WO2022170989A1

WO2022170989A1 - Developable instrument and surgical robot system

Info

Publication number: WO2022170989A1
Application number: PCT/CN2022/074246
Authority: WO
Inventors: 徐凯; 唐奥林
Original assignee: 北京术锐技术有限公司
Priority date: 2021-02-09
Filing date: 2022-01-27
Publication date: 2022-08-18
Also published as: CN114903538A

Abstract

A developable instrument (100) and a surgical robot system. The developable instrument comprises: a developable tube (110, 210, 310, 510). The developable tube (110, 210, 310, 510) comprises an inner layer (111, 211, 311, 511), an outer layer (112, 212, 312, 512), and a fluid lumen (113, 213, 313, 513) located between the inner layer (111, 211, 311, 511) and the outer layer (112, 212, 312, 512), the fluid lumen (113, 213, 313, 513) being used for accommodating a fluid. The developable tube (110, 210, 310, 510) further comprises a flippable region (114, 214, 314, 514) at the distal end, and the inner layer (111, 211, 311, 511) and the outer layer (112, 212, 312, 512) are connected to each other and can flip at the flippable region (114, 214, 314, 514). The developable instrument (100) can better adapt to a complex orifice so as to reduce or avoid contact and friction with the orifice.

Description

Growing instruments and surgical robotic systems

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 2021101759423, filed on February 9, 2021, and the invention title is "Growthable Instrument and Surgical Robot System", the full text of which is hereby incorporated by reference in its entirety.

technical field

The present disclosure relates to the field of instruments, and in particular, to a growable instrument and a surgical robot system.

Background technique

Traditional disease diagnosis and surgical treatment are mainly divided into open diagnosis and surgery and endovascular interventional diagnosis and treatment. Endovascular intervention diagnosis or treatment is to make an incision on blood vessels and skin to form a channel without exposing the lesion, or to reach the target position through the original cavity of the human body under the guidance of imaging equipment to diagnose the local lesion. Or treatment, with the characteristics of less trauma.

Traditional endovascular interventional surgery is mainly performed manually by doctors. In order to reduce the burden on doctors and improve the efficiency and safety of endovascular intervention, the method of using endovascular interventional instruments to assist in interventional diagnosis or surgery has gradually become a research hotspot in the industry. Endovascular interventional instruments have the advantages of precise movement, high repeatability, and remote control. At the same time, they can also eliminate the doctor's physiological tremors during manual operation and the danger of misoperation caused by fatigue.

However, the currently used methods of instrument-assisted interventional diagnosis or surgery have the following problems: 1. The volume of interventional instruments is large, which limits the further promotion of instrument-assisted endovascular interventional diagnosis or surgery; 2. The flexibility of interventional instruments is relatively poor and cannot be adapted to It bends the complex human orifice, and can cause damage to the orifice.

SUMMARY OF THE INVENTION

Based on the above problems, the present disclosure provides a growable instrument and a surgical robot system, which has good flexibility, can achieve controllable growth and extension, and can be well adapted to complex cavities.

In some embodiments, the present disclosure provides a growable apparatus comprising: a growable tube comprising an inner layer, an outer layer, and a fluid chamber between the inner layer and the outer layer, the fluid chamber for containing a fluid ; the growable tube includes an expandable region at the distal end, and the inner and outer layers are connected and expandable in the expandable region.

In some embodiments, the present disclosure provides a surgical robotic system including a system controller and a growable instrument as described above, the system controller being configured to control movement of the growable instrument.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present disclosure more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present disclosure. Obviously, the accompanying drawings in the following description only illustrate some implementations of the present disclosure. For example, for those of ordinary skill in the art, other embodiments can also be obtained according to the contents of the embodiments of the present disclosure and these drawings without creative efforts.

FIG. 1 shows a schematic structural diagram of a distal end portion of a growable device according to some embodiments of the present disclosure;

FIG. 2 shows a schematic structural diagram of a distal end portion of a growable device located in a lumen of a body according to some embodiments of the present disclosure;

Figure 3(a) shows a cross-sectional view of a growable tube according to some embodiments of the present disclosure;

Figure 3(b) illustrates another cross-sectional view of a growable tube according to some embodiments of the present disclosure;

FIG. 4( a ) shows a schematic diagram of a distal end structure of a graded growable tube according to some embodiments of the present disclosure;

Figure 4(b) shows a schematic diagram of a distal end structure of another graded growable tube according to some embodiments of the present disclosure;

FIG. 5( a ) shows a schematic diagram of a distal end structure of a step-type growable tube according to some embodiments of the present disclosure;

Fig. 5(b) shows a schematic diagram of the distal end structure of another step-type growable tube according to some embodiments of the present disclosure;

FIG. 6( a ) shows a partial structural schematic diagram of a tube driving mechanism according to some embodiments of the present disclosure;

Fig. 6(b) shows a partial structural schematic diagram of another tube driving mechanism according to some embodiments of the present disclosure;

FIG. 7 shows a schematic structural diagram of a growable device according to some embodiments of the present disclosure;

8 shows a schematic structural diagram of another growable device according to some embodiments of the present disclosure;

FIG. 9 shows a schematic structural diagram of a guide according to some embodiments of the present disclosure;

Fig. 10(a) shows a schematic structural diagram of an introducer driving mechanism according to some embodiments of the present disclosure;

Figure 10(b) shows a schematic structural diagram of another guide drive mechanism according to some embodiments of the present disclosure;

FIG. 11 shows a schematic structural diagram of another guide according to some embodiments of the present disclosure;

FIG. 12 shows a schematic structural diagram of another guide according to some embodiments of the present disclosure;

13 shows a schematic structural diagram of a turning member of a guide according to some embodiments of the present disclosure;

FIG. 14 shows a schematic structural diagram of a turning unit according to some embodiments of the present disclosure;

15 shows a schematic structural diagram of another turning member of the guide according to some embodiments of the present disclosure;

16 shows a schematic structural diagram of a slit unit according to some embodiments of the present disclosure;

17 illustrates a longitudinal cross-sectional view of another turn member of an introducer according to some embodiments of the present disclosure.

Detailed ways

In order to make the technical problems solved by the present disclosure, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present disclosure will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only the present disclosure. Some examples, but not all examples. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present disclosure.

In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the present disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. In the description of the present disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected" and "coupled" should be understood in a broad sense, for example, it may be a fixed connection, or It can be a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood in specific situations.

In the present disclosure, the end close to the operator (eg doctor) is defined as proximal, proximal or posterior, posterior, and the end close to the surgical patient is defined as distal, distal or anterior, anterior. Those skilled in the art can understand that the growable device according to the embodiments of the present disclosure can be used in the medical field and also in other non-medical fields.

FIG. 1 shows a schematic diagram of a distal end portion of a growable device 100 according to some embodiments of the present disclosure, and FIG. 2 shows a lumen 115 of the growable device 100 in a body (eg, a human body or an animal body) according to some embodiments of the present disclosure. (eg blood vessels, trachea, esophagus, vagina, intestines, etc.) The growable device 100 may enter the lumen 115 through an opening (eg, an incision or natural opening). As shown in FIGS. 1 and 2 , the growable device 100 may include a growable tube 110 . The growable tube 110 may comprise a flexible material. The growable tube 110 includes an inner layer 111 , an outer layer 112 , and a fluid cavity 113 between the inner layer 111 and the outer layer 112 . Fluid chamber 113 is used to contain fluid 140 . The growable tube 110 also includes an expandable region 114 at the distal end in which the inner layer 111 and the outer layer 112 are connected and expandable. In some embodiments, the radial dimension of the proximal end of the outer layer 112 is larger than the radial dimension of the distal end of the outer layer 112, as shown in FIG. 1, to accommodate the narrowing lumen. Those skilled in the art will appreciate that, in some embodiments, the radial dimension of the proximal end of the outer layer 112 may be equal to or smaller than the radial dimension of the distal end of the outer layer 112 . The inner layer 111 may be turned inside out at the expandable area 114 to form the outer layer 112 , or the outer layer 112 may be turned inside out at the expandable area 114 to form the inner layer 111 . By unfolding between the inner layer 111 and the outer layer 112, the growable tube 110 may grow distally (eg, extend or stretch) or withdraw to facilitate the growth of the growable device 100 within the lumen 115 to a target location or from The channel 115 is withdrawn. For example, the inner layer 111 is moved distally by a length L, the inner layer 111 of the length L is everted in the expandable region 114 to form the outer layer 112, and the fluid 140 fills the fluid cavity 113 grown by the eversion of the inner layer 111, Thereby the growable tube 110 can grow forward. The inner layer 111 is moved proximally by the length L', and the outer layer 112 of the length L' is inverted in the expandable region 114 to form the inner layer 111 so that the growable tube 110 can be retracted.

In some embodiments, the growable device 100 may also include a guide 170 that is bendable in at least one degree of freedom at the distal end. The inner layer 111 of the growable tube 110 surrounds and forms a channel 1111 , the guide 170 is disposed in the channel 1111 , and the distal end of the guide 170 can drive the growable tube 110 to bend when bending. The steering of the growable tube 110 can be achieved to adapt to the complicatedly curved lumen 115 through the turning guidance of the guide 170 . Thus, the growable tube 110 can grow distally, through the lumen 115, to the target location. In some embodiments, the radial dimension of the proximal end of the outer layer 112 may be greater than the radial dimension of the distal end of the outer layer 112 . In this way, the growable device 100 can accommodate the narrowing lumen 115 to reduce or avoid contact and friction with the lumen 115 . In some embodiments, the introducer 170 may include a distally located endoscope, surgical implement, applicator, or the like.

3(a) and 3(b) respectively illustrate cross-sectional views of a growable tube 110 according to some embodiments of the present disclosure. In some embodiments, as shown in FIG. 3( a ), the cross-section of the growable tube 110 may be circular. In some embodiments, as shown in FIG. 3( b ), the cross-section of the growable tube 110 may be elliptical. It should be understood that the cross-section of the growable tube 110 includes, but is not limited to, the structures of the above-described embodiments, and may include other shapes, such as rectangles, polygons, and the like. In some embodiments, the growable tube 110 includes a flexible material including, but not limited to, plastic, rubber, and the like, such as low density polyethylene, silicon-containing polymers, or fluoropolymers, and the like. The flexible growable tube 110 can avoid damage to the lumen 115 .

FIGS. 4( a ) and 4 ( b ) respectively illustrate schematic structural views of distal portions of graded

growable tubes

110 and 210 according to some embodiments of the present disclosure. As shown in FIG. 4( a ), in some embodiments, the radial dimension of the outer layer 112 may gradually decrease from the proximal end to the distal extension direction. The contour of the outer layer 112 may be straight, curved, or a combination thereof. It can be understood that the morphology of the

growable tubes

110 and 210 shown in FIGS. 4( a ) and 4 ( b ) may be the morphology during the growth process or the morphology when the growth is stopped. The inner layer 111 of the growable tube 110 may remain substantially unchanged from the proximal end to the distal end. In the state where the unfolding is stopped (eg, in a fully grown state, or when approaching the location of the lesion), the thickness of the fluid cavity 113 increases from the proximal end. It gradually decreases in the direction of distal extension. The inner layer 111 surrounds and forms a channel 1111 , the radial dimension of the channel 1111 extending from the proximal end to the distal end remains substantially unchanged, and the channel 1111 can be used to accommodate the introducer 170 . Either the inner layer 111 or the outer layer 112 can be driven to move distally or proximally. For example, the inner layer 111 is moved distally by a length L, the inner layer 111 of the length L is everted in the expandable region 114 to form the outer layer 112, and the fluid 140 fills the fluid cavity 113 grown by the eversion of the inner layer 111, Thereby the growable tube 110 can grow forward. The inner layer 111 is moved proximally by the length L', and the outer layer 112 of the length L' is inverted in the expandable region 114 to form the inner layer 111 so that the growable tube 110 can be retracted.

As shown in FIG. 4(b), the radial dimension of the outer layer 212 may gradually decrease from the proximal end to the distal extension direction. The contour of the outer layer 212 may be straight, curved, or a combination thereof. The inner layer 211 of the growable tube 210 may gradually decrease from the proximal end to the distal end, and in a state where the unfolding is stopped (eg, a fully grown state, or when approaching the location of the lesion), so that the thickness of the fluid cavity 213 increases from the proximal end. The direction of distal extension remains substantially unchanged or gradually decreases. The inner layer 211 surrounds and forms the channel 2111, and the radial dimension of the channel 2111 gradually decreases from the proximal end to the distal end. Channel 2111 may be used to accommodate guide 170 . Either the inner layer 111 or the outer layer 112 can be driven to move distally or proximally such that the inner layer 211 can be everted at the expandable area 214 to form the outer layer 212, or the outer layer 212 can be turned inside out at the expandable area 214 The inner layer 211 is formed.

FIGS. 5( a ) and 5 ( b ) respectively illustrate schematic structural views of the distal end portions of the step-type

growable tubes

310 and 510 according to some embodiments of the present disclosure. In some embodiments, as shown in FIGS. 5( a ) and 5 ( b ), the radial dimensions of the

outer layers

312 and 512 may decrease in steps from the proximal end to the distal extension direction. In the present disclosure, stepped means that the profile slope of the layer changes significantly at the stepped region. It is understood that the morphology of the

growable tubes

310 and 510 shown in 5(a) and 5(b) may be the morphology during growth or the morphology when growth is stopped. In some embodiments, as shown in FIG. 5( a ), the outer layer 312 may include a proximal section 3121 and a distal section 3122 , the radial dimension of the proximal section 3121 gradually decreases from the proximal end to the distal extension direction, and the distal section 3122 The radial dimension of the 3121 gradually decreases from the proximal end to the distal extension direction, and the contour slope of the proximal section 3121 is different at the connection and the contour slope of the distal section 3122 at the connection, so as to form a stepped profile. The inner layer 311 of the growable tube 310 may remain substantially unchanged from the proximal end to the distal end. In a state where the unfolding is stopped (eg, in a state of complete growth, or when it is close to the lesion), the thickness of the fluid cavity 313 decreases in a stepwise manner from the proximal end to the distal extension direction. The inner layer 311 surrounds and forms a channel 3111 , the radial dimension of the channel 3111 extending from the proximal end to the distal end remains substantially unchanged, and the channel 3111 is used for accommodating the introducer 170 . Either the inner layer 311 or the outer layer 312 can be driven to move distally or proximally. For example, the inner layer 311 is moved distally by a length L, the inner layer 311 of the length L is everted in the expandable region 314 to form the outer layer 312, and the fluid 340 fills the fluid cavity 313 grown by the eversion of the inner layer 311, Thereby the growable tube 310 can grow forward. The inner layer 311 is moved proximally by the length L', and the outer layer 312 of the length L' is inverted in the expandable region 314 to form the inner layer 311 so that the growable tube 310 can be retracted.

In some embodiments, as shown in FIG. 5(b), the outer layer 512 may comprise a stepped profile composed of multiple segments with different radial dimensions. As shown in FIG. 5(b), the outer layer 512 may sequentially include a proximal segment 5121a, a proximal segment 5121b, a distal segment 5122a, and a distal segment 5122b with different radial dimensions, the radial dimensions of the proximal segment 5121a and the distal segment 5122a remaining substantially different The radial dimensions of the variable, proximal segment 5121b and distal segment 5122b, respectively, gradually decrease from the proximal end to the distal extension direction. The proximal segment 5121a and the proximal segment 5121b may be a gradual or abrupt connection at the connection region, the proximal segment 5121b and the distal segment 5122a may be a gradual or abrupt connection at the connection region, and the distal segment 5122a and the distal segment 5122b may be a gradual connection at the connection region Or mutated connections to form multi-step stepped profiles. The radial dimension of the inner layer 511 of the growable tube 510 may remain substantially constant or gradually decrease in a direction extending from the proximal end to the distal end. In a state where the unfolding is stopped (eg, in a fully grown state, or near the location of the lesion), the thickness of the fluid lumen 513 decreases from the extending direction of the proximal segment 5121a, the proximal segment 5121b, the distal segment 5122a, and the distal segment 5122b. The inner layer 511 surrounds and forms the channel 5111 , the radial dimension of the channel 5111 extending from the proximal end to the distal end remains substantially unchanged, and the channel 5111 is used for accommodating the introducer 170 . Either the inner layer 511 or the outer layer 512 can be driven to move distally or proximally such that the inner layer 511 can be everted at the expandable region 514 to form the outer layer 512, or the outer layer 512 can be inverted at the expandable region 514 The inner layer 511 is formed.

The growable device 100 may include one of the

growable tubes

110 , 210 , 310 , 510 . In some embodiments, the growable device 100 may also include a tube drive mechanism 120 . FIG. 6( a ) shows a partial structural schematic diagram of the tube driving mechanism 120 according to some embodiments of the present disclosure. As shown in FIG. 6( a ), the tube driving mechanism 120 is connected to the growable tube 110 (or 210 , 310 , 510 ), and the tube drive mechanism 120 can move linearly for driving the outer layer 112 or the inner layer of the growable tube 110 111 Movement. In some embodiments, the tube drive mechanism 120 may be coupled with the outer layer 112 of the growable tube 110 to drive the outer layer 112 of the growable tube 110 in motion. In some embodiments, as shown in FIG. 6( a ), the tube driving mechanism 120 may be connected with the inner layer 111 of the growable tube 110 to drive the inner layer 111 of the growable tube 110 to move.

In some embodiments, as shown in FIG. 6(a), the tube drive mechanism 120 may include two

rollers

121a and 121b arranged side by side, a moving rod 122 arranged between the two rollers 121a-b, and two rollers 121a-b. The rollers 121a-b are respectively connected to the drive units (not shown in the figure). The inner layer 111 of the growable tube 110 (or 210 , 310 , 510 ) is sealingly attached to the distal periphery of the travel rod 122 . The driving unit respectively drives the two rollers 121a-b to rotate synchronously and in opposite directions at a constant speed to drive the moving rod 122 to move linearly, so as to drive the inner layer 111 of the growable tube 110 to move through the moving rod 122. The moving rod 122 drives the inner layer 111 to move distally. In the unfoldable area 114 , the inner layer 111 is everted to form the outer layer 112 , so that the fluid 140 fills the fluid cavity 113 growing with the eversion of the inner layer 111 . In some embodiments, the distance that the growable tube 110 is extended by the unfolding of the inner layer 111 is approximately equal to the distance that the moving rod 122 is moved. In some embodiments, the distance that the growable tube 110 is extended by the unfolding of the inner layer 111 is less than the distance that the moving rod 122 is moved.

In some embodiments, as shown in FIG. 6(a), the guide 170 is disposed in the channel 1111, the proximal end of the guide 170 passes through the lumen of the moving rod 122, and is connected with the guide driving mechanism (not shown in the figure) ) is connected, and the guide 170 is moved distally by the guide drive mechanism, synchronizing with the growth of the growable tube 110. The distal end of the guide 170 can bend under the drive of the guide driving mechanism, so as to drive the growable tube 110 to bend. Steering of the growable tube 110 to accommodate the complex curvature of the lumen 115 can be achieved by the guide 170 .

The growable device 200 may include one of the

growable tubes

110 , 210 , 310 , 510 , and a tube drive mechanism 220 . FIG. 6( b ) shows a partial structural schematic diagram of the tube driving mechanism 220 according to some embodiments of the present disclosure. In some embodiments, as shown in FIG. 6( b ), the tube driving mechanism 220 may include a lead screw slider module 221 and a moving rod 222 driven by the lead screw slider module 221 . The lead screw slider module 221 may include a lead screw 223 and a slider 224 connected by threads, a moving rod 222 fixedly connected to the slider 224 , and a drive unit (not shown in the figure) connected to the lead screw 223 . In some embodiments, the lead screw slider module 221 may further include a guide rod 225 slidably penetrated on the slider 224 . The outer layer 112 or the inner layer 111 of the growable tube 110 (or 210 - 610 ) is sealingly connected to the moving rod 222 . The driving unit drives the screw 223 to rotate, the slider 224 can move linearly along the guide rod 225, and drives the moving rod 222 fixedly connected to the slider 224 to move linearly, thereby driving the outer layer 112 or the inner layer 111 of the growable tube 110 to move.

It should be understood that the pipe driving mechanism of the present disclosure includes, but is not limited to, the structures of the above embodiments, as long as the driving mechanism capable of realizing linear motion does not depart from the scope of the present disclosure.

FIG. 7 shows a schematic structural diagram of a growable device 100 (or 200 ) according to some embodiments of the present disclosure. As shown in FIG. 7 , in some embodiments, the growable device 100 (or 200 ) further includes a fluid controller 130 . The fluid controller 130 is used to pressurize the fluid 140 to drive the fluid 140 to gradually fill the fluid cavity 113 between the outer layer 112 and the inner layer 111 . In some embodiments, the fluid 140 may be a liquid fluid, such as physiological saline, or a gaseous fluid, such as air, carbon dioxide gas, or other inert gas. In some embodiments, the fluid controller 130 may include a gas pump or a liquid pump, or the like.

In some embodiments, as shown in FIG. 7 , the growable device 100 (or 200 ) may also include a fluid tank 150 . The fluid box 150 may include a fluid outlet channel 151 and a fluid control channel 152 through which the fluid controller 130 communicates with the fluid box 150 . Control channel 152 may include fluid conduits, switches, and the like. In some embodiments, the outer layer 112 of the growable tube 110 may be sealingly connected to the periphery of the fluid outlet channel 151, and the inner layer 111 of the growable tube 110 may extend through the fluid outlet channel 151 toward the proximal end of the fluid box 150 and communicate with the tube The travel rod 122 of the drive mechanism 120 is connected sealingly. The tube driving mechanism 120 may drive the inner layer 111 of the growable tube 110 to move distally or proximally. The fluid controller 130 may control the fluid pressure in the fluid tank 150 and the fluid chamber 113, eg, maintain the pressure in the fluid tank 150 and the fluid chamber 113 at a predetermined value or a predetermined interval. In some embodiments, when the outer layer 112 or the inner layer 111 is driven by the tube drive mechanism 120 to unfold in the unfoldable region 114, the fluid controller 130 can control the fluid 140 to fill the growing fluid cavity 113 or withdraw from the The fluid chamber 113 is retracted. For example, the tube driving mechanism 120 drives the inner layer 111 of the growable tube 110 to move distally by the length L, and the inner layer 111 is everted by the length L in the expandable region 114 to form the outer layer 112, so that the fluid cavity 113 grows distally. Fluid controller 130 pressurizes (eg, injects fluid) into fluid tank 150 , causing fluid 140 to fill fluid cavity 113 of growable tube 110 , thereby filling fluid cavity 113 grown in expandable region 114 . For another example, the tube driving mechanism 120 drives the inner layer 111 of the growable tube 110 to move the length L' toward the proximal end, and the outer layer 112 inverts the length L' in the expandable region 114 to form the inner layer 111, so that the fluid cavity 113 moves closer end retraction. The fluid controller 130 depressurizes (eg, withdraws fluid) within the fluid tank 150 to withdraw the fluid 140 from the fluid lumen 113 of the growable tube 110 into the fluid tank 150, thereby withdrawing the growable tube 110 proximally. In some embodiments, the distance that the flap grows or retracts is substantially equal to the distance that the tube drive mechanism 120 travels. In some embodiments, the distance that the flap grows or retracts is less than the distance that the tube drive mechanism 120 travels.

In some embodiments, the tube driving mechanism 120 may be disposed outside the fluid box 150 , and the inner layer 111 of the growable tube 110 may extend through the fluid box 150 to connect with the tube driving mechanism 120 . In some embodiments, as shown in FIG. 7 , at least a portion of the moving rod 122 of the tube driving mechanism 120 may be disposed inside the fluid tank 150 to connect with the inner layer 111 of the growable tube 110 .

In some embodiments, the guide 170 is disposed in the channel 1111, and the proximal end of the guide 170 is connected to the guide drive mechanism (not shown) through the lumen of the moving rod 122 of the tube drive mechanism 120. The distal end is bent under the drive of the introducer driving mechanism, so that the growable tube 110 can be driven to bend.

In some embodiments, the growable device 100 further includes a system controller (not shown in the figure), through which the movement distance of the tube driving mechanism 120 and the pressure applied by the fluid controller 130 in the fluid chamber 113 are controlled by the system controller, so that the The growable device 100 can be controllably grown. In some embodiments, the system controller may control the fluid controller 130 , eg, send pressurization, depressurization commands to the fluid controller 130 . In some embodiments, the system controller may also control the deflection of the guide 270 for growth direction control of the growable instrument 200.

As shown in FIG. 7 , in some embodiments, the growable device 100 further includes a pressure sensor 160 . A pressure sensor 160 may be provided on the fluid tank 150 for detecting the pressure in the fluid tank 150 . Pressure sensor 160 may be connected to fluid controller 130 to signal fluid pressure within fluid tank 150 to fluid controller 130 . The fluid controller 130 may control the fluid pressure in the fluid chamber 150 and the fluid chamber 113 according to the fluid pressure signal.

FIG. 8 shows a schematic structural diagram of a growable device 200 (or 100 ) according to some embodiments of the present disclosure. In some embodiments, as shown in FIG. 8 , the growable device 200 (or 100 ) may further include a fluid tank 250 including a fluid outlet channel 251 and a fluid control channel 252 through which the fluid controller 230 passes. In communication with fluid tank 250 . At least one sealing ring 253 may be provided in the fluid box 250 , and the outer periphery of the sealing ring 253 is in sealing contact with the inner wall of the fluid box 250 . The fluid outlet channel 251 is annular, the inner layer 211 of the growable tube 210 is sealed and connected to the inner or outer side of the inner ring wall of the fluid outlet channel 251 , and the outer layer 212 of the growable tube 210 passes through the fluid outlet channel 251 to the fluid tank 250 The proximal extension is in sealing connection with the sealing ring 253 , and the sealing ring 253 and the moving rod 222 of the tube driving mechanism 220 are tightly connected by at least one connecting rod 226 . At least a part of the moving rod 222 of the tube driving mechanism 220 is disposed inside the fluid tank 250 and is connected with the sealing ring 253 to drive the sealing ring 253 to linearly move along the length direction of the fluid tank 250 . The sealing ring 253 can prevent the fluid 240 in the fluid tank 250 from leaking from the gap between the outer layer 212 of the growable tube 210 and the inner layer of the fluid tank 250 . For example, the tube driving mechanism 220 drives the outer layer 212 of the growable tube 210 to move the length L to the distal end, and the outer layer 212 of the length L is inverted in the expandable region 214 to form the inner layer 211, and the fluid 240 is filled by the outer layer. The fluid cavity 213 grows inwardly 212 so that the growable tube 210 can grow forward. The outer layer 212 moves proximally by the length L', and the inner layer 211 of the length L' is everted in the expandable region 214 to form the outer layer 212 so that the growable tube 210 can be retracted. In some embodiments, as shown in FIG. 8 , a pressure sensor 260 is provided on the fluid tank 250 for detecting the pressure within the fluid tank 250 . Pressure sensor 260 may be connected to fluid controller 230 to signal fluid pressure within fluid tank 250 to fluid controller 230 . The fluid controller 230 may control the fluid pressure in the fluid tank 250 and the fluid chamber 213 according to the fluid pressure signal.

In some embodiments, the guide 270 is disposed in the channel 2111, and the proximal end of the guide 270 is connected to the guide drive mechanism (not shown) through the lumen of the moving rod 222 of the tube drive mechanism 220. The distal end is bent under the driving of the introducer driving mechanism, so that the growable tube 210 can be driven to bend. In some embodiments, the growable device 200 further includes a system controller (not shown in the figure), through which the system controller controls the moving distance of the tube driving mechanism 220 and the pressure applied by the fluid controller 230 in the fluid chamber 213, so that the The growable device 200 can work with precision. In some embodiments, the system controller may control the fluid controller 230 , eg, send pressurization, depressurization commands to the fluid controller 230 . In some embodiments, the system controller may also control the deflection of the guide 270 for growth direction control of the growable instrument 200.

FIG. 9 shows a schematic structural diagram of the guide 170 according to some embodiments of the present disclosure. In some embodiments, as shown in FIG. 9 , the introducer 170 can include at least one distal continuum 172 . The distal continuum 172 includes a distal base 1721, a distal stop 1722, and a plurality of first structural bones 1723. The distal base plate 1721 and the distal stop plate 1722 are arranged at intervals, the distal ends of the plurality of first structural bones 1723 are fastened to the distal stop plate 1722, and the proximal ends of the plurality of first structural bones 1723 pass through the distal base plate 1721. In some embodiments, the distal ends of the plurality of first structural bones 1723 are secured on the distal stop 1722 at circumferential intervals. For example, the plurality of first structural bones 1723 may be evenly spaced or regularly symmetrical. In some embodiments, the plurality of first structural bones 1723 may be nitinol wires, steel wires, or the like. In some embodiments, the number of the first structural bones 1723 may be four, and the two correspondingly arranged structural bones can be pushed and pulled cooperatively, so that the distal continuum 172 can be bent in the direction of the first degree of freedom, and the correspondingly arranged structural bones can be pushed and pulled cooperatively. For the other two structural bones, the distal continuum 172 can be bent in the direction of the second degree of freedom, so that the guide 170 has at least one degree of freedom. In some embodiments, the number of the first structural bones 1723 may also be 6, 8, 12, and so on. The number of the first structural bones 1723 may include, but is not limited to, the number in the above embodiments.

As shown in FIG. 9, in some embodiments, the introducer 170 may include a series of distal continuums 172, 172'. The distal base 1721 of the distal continuum 172 at the distal end becomes the distal stop 1722' of the distal continuum 172' at the proximal end. Providing two or more distal continuums 172 may increase the bending flexibility of the introducer 170 .

In some embodiments, as shown in FIG. 9, the distal continuum 172, 172' may further include a distal base 1721' and a distal stop disposed between the distal base 1721 and the distal stop 1722 At least one distal spacer disk 1724, 1724' between 1722', the proximal ends of the plurality of first structural bones 1723 pass through the at least one distal spacer disk 1724, the distal base disk 1721, the distal spacer disk 1724' and The distal base plate 1721', the proximal ends of the plurality of first structural bones 1723' pass through the at least one distal spacer plate 1724' and the distal base plate 1721' in sequence. Disposing the distal spacer discs 1724, 1724' can enhance the stability of the plurality of first structural bones 1723, 1723' during the pushing and pulling process.

In some embodiments, the growable apparatus 100 (or 200) may further include an introducer drive mechanism, and the introducer drive mechanism may be connected with the plurality of first structural bones 1723, 1723' by pushing and pulling the first structural bones 1723, 1723' In order to drive the distal continuum 172, 172' to bend in different directions in space. FIG. 10( a ) shows a schematic structural diagram of an introducer driving mechanism 180 according to some embodiments of the present disclosure. As shown in FIG. 10( a ), in some embodiments, the introducer driving mechanism 180 may include at least one set of double-ended screw modules 181 , and the double-ended screw modules 181 may include a double-ended screw 182 , and a double-ended screw 182 A pair of sliding

blocks

183a and 183b which are threadedly connected, and a driving unit (not shown) connected with the double-ended screw 182 . In some embodiments, the double-ended screw module 181 may include

guide rods

184a and 184b slidably passed through the

sliders

183a and 183b, respectively. At least a pair of first

structural bones

1723a and 1723b are fixedly connected to the

sliders

183a and 183b, respectively. The driving unit drives the double-ended screw 182 to rotate, and the sliding

blocks

183a and 183b are respectively driven to move linearly in opposite directions (eg, along the

guide rods

184a and 184b), so as to cooperatively push and pull the first

structural bones

1723a and 1723b. The plurality of first structural bones 1723 can be cooperatively pushed and pulled through at least one set of double-ended screw modules 181, so as to realize the bending of the distal continuum 172 or 172'.

In some embodiments, the growable device 100 (or 200) may also include an introducer drive mechanism. FIG. 10( b ) shows a schematic structural diagram of an introducer driving mechanism 280 according to some embodiments of the present disclosure. As shown in FIG. 10( b ), the guide drive mechanism 280 may include at least one set of lead screw nut modules 281 , and the lead screw nut module 281 may include a threaded lead screw 282 and a nut 283 , which are slidably penetrated through the nut 283 The guide rod 284 and the drive unit connected with the screw rod 282 (not shown in the figure). At least one first structural bone 1723 or 1723' is fixedly connected with the nut 283. The drive unit drives the lead screw 282 to rotate, and the drive nut 283 moves linearly (eg, along the guide rod 284), thereby pushing or pulling the first structural bone 1723 or 1723'. The plurality of first structural bones 1723 or 1723' are cooperatively pushed and pulled through at least one set of screw nut modules 281, so as to realize the bending of the distal continuum 172. It should be understood that the introducer driving mechanism of the present disclosure includes, but is not limited to, the structures in the above embodiments, and as long as the driving mechanism for pushing and pulling the structural bone can be implemented, it will not depart from the scope of the present disclosure.

In some embodiments, as shown in FIG. 11 , the introducer 170 can also include at least one proximal continuum 173 including a proximal base 1731 , a proximal stop 1732 and a plurality of second structural bones 1733 . The proximal base plate 1731 and the proximal stop plate 1732 are arranged at intervals, the proximal base plate 1731 is adjacent to the distal base plate 1721, the proximal ends of the plurality of second structural bones 1733 are fastened to the proximal stop plate 1732, and the multiple The distal ends of the second structural bones 1733 can be respectively fixedly connected or integrally formed with the proximal ends of the plurality of first structural bones 1723 through the proximal base plate 1731 . In some embodiments, the plurality of second structural bones 1733 may be nitinol wires, steel wires, or the like.

In some embodiments, as shown in FIG. 11 , the proximal continuum 173 may further include at least one proximal spacer disk 1734 disposed between the proximal base disk 1731 and the proximal stop disk 1732, a plurality of second structural bones The proximal end of 1733 passes through at least one proximal spacer disc 1734 and proximal base disc 1731 in sequence. The provision of the proximal spacer disc 1734 can enhance the stability of the plurality of second structural bones 1733 during the pushing and pulling process.

In some embodiments, as shown in FIG. 11 , the guide drive mechanism 380 can be connected with the proximal end stop 1732 to drive the proximal end stop 1732 to move and turn over, so as to push and pull the first stop plate arranged on the proximal stop plate 1732 The second structural bone 1733 pushes and pulls the first structural bone 1723 through the second structural bone 1733 to drive the distal continuum 172 to bend in different directions in space. In some embodiments, the second structural bone 1733 and the first structural bone 1723 may be the same structural bone that is fixedly connected or integrally formed. In some embodiments, the proximal ends of the plurality of second structural bones 1733 are fastened to and pass through the proximal end stop 1732, and the introducer drive mechanism 180 (or 280) can be connected to the plurality of second structural bones. 1733 is connected, and the plurality of second structural bones 1733 are pushed and pulled together to drive the distal continuum 172 to bend in different directions in space.

FIG. 12 shows a schematic structural diagram of a guide 270 according to some embodiments of the present disclosure. In some embodiments, as shown in FIG. 12, the introducer 270 can also include at least one proximal continuum 273 including a proximal base 2731, a first proximal stop 2732a, a second proximal stop 2732b, and multiple Root second structural bone 2733. The proximal base plate 2731, the first proximal end stop plate 2732a and the second proximal end stop plate 2732b are arranged at intervals, the proximal end base plate 2731 is adjacent to the distal base plate 2721, and the proximal ends of the plurality of second structural bones 2733 are adjacent to the first base plate 2733. The two proximal stop discs 2732b are fastened and connected, and the distal ends can pass through the first proximal stop disc 2732a to be fastened to the proximal base plate 2731, and the proximal ends of the plurality of first structural bones 2723 pass through the proximal base plate 2731 and are connected to the proximal base plate 2731. The first proximal stop 2732a is securely attached.

In some embodiments, the introducer driving mechanism 480 can be connected with the second proximal stop 2732b for driving the second proximal stop 2732b to move and turn over, so as to generate the proximal base 2731 and the second proximal stop 2732b Displacement, so that the plurality of second structural bones 2733 are bent, and the first proximal stop plate 2732a is driven to turn over together, so as to align the plurality of first structural bones whose ends are fixed on the first proximal stop plate 2732a. The 2723 pushes and pulls, thereby driving the distal continuum 272 to bend in different directions in space. In some embodiments, the proximal ends of the plurality of second structural bones 2733 are securely connected to the second proximal stop 2732b and pass through the second proximal stop 2732b, and are connected to the introducer drive mechanism 180 (or 280) through the second proximal stop 2732b. The second structural bone 2733 is pushed and pulled to cause the first proximal stop plate 2732a to be flipped cooperatively, thereby pushing and pulling the plurality of first structural bones 2723 to drive the distal continuum 272 to bend in different directions in space.

In some embodiments, the introducer may include a turn member and a drive wire connected to the turn member. FIG. 13 shows a schematic structural diagram of the turning member 371 of the guide 370 according to some embodiments of the present disclosure. As shown in FIG. 13 , the distal end of the driving wire 373 is fastened to the distal end of the turning member 371 , and the driving wire 373 can drive the turning member 371 to rotate under the driving of the introducer driving mechanism (eg, the introducer driving mechanism 180 or 280 ). Bending in at least one degree of freedom direction, thereby driving the growable tube 110 (or 210 , 310 , 510 ) to turn, so as to adapt to the complicatedly curved lumen 115 .

In some embodiments, as shown in FIG. 13 , the turning member 371 may include a serpentine structure 372 . FIG. 14 shows a schematic structural diagram of the turning unit 3721 according to some embodiments of the present disclosure. As shown in FIG. 13 and FIG. 14 , the snake-bone structure 372 may include a plurality of hollow bamboo-shaped bending units 3721 connected end to end, and two adjacent bending units 3721 may be connected by nested connecting grooves 3722 The connecting protrusion 3723 forms a radially bendable kinematic pair. The driving wire 373 can be arranged through each bending unit 3721 or through the tube wall of each bending unit 3721 (refer to FIG. 13 ). The distal end of the driving wire 373 is fixedly arranged at the distal end of the snake bone structure 372. The guide driving mechanism pushes or pulls the driving wire 373 to drive the serpentine structure 372 to bend, thereby driving the growable tube 110 to bend. In some embodiments, the number of the driving wires 373 may be multiple, which are distributed at intervals along the circumferential direction. By pushing, pulling, or cooperatively pushing and pulling the multiple driving wires 373, the bending direction of the snake bone structure 372 can be adjusted, so as to achieve growth. Bending of the tube 110 in multiple degrees of freedom directions.

In some embodiments, the turning member may be a flexible sleeve. FIG. 15 shows a schematic structural diagram of the turning member 471 of the guide 470 according to some embodiments of the present disclosure, and FIG. 16 shows a structural schematic diagram of the slit unit 473 according to some embodiments of the present disclosure. As shown in FIGS. 15 and 16 , the flexible sleeve 472 may be provided with a plurality of slit units 473 at intervals along the extending direction thereof, and each slit unit 473 may include at least one slit 4731 extending along the circumferential direction of the flexible sleeve 472 . In some embodiments, the slit unit 473 may include a plurality of slits 4731 , the plurality of slits 4731 are arranged at intervals along the axial direction of the flexible sleeve 472 , and the plurality of slits 4731 are sequentially displaced along the circumferential direction of the flexible sleeve 472 set up. The driving wire 474 can be disposed through the flexible sleeve 472 or through the tube wall of the flexible sleeve 472 (refer to FIG. 15 ), and the distal end of the driving wire 474 is fixedly disposed at the distal end of the flexible sleeve 472 . The guide driving mechanism (eg, the guide driving mechanism 180 or 280 ) pushes and pulls the driving wire 474 to drive the flexible sleeve 472 to bend, thereby driving the growable tube 110 to bend. In some embodiments, the number of the driving wires 474 may be multiple, which are distributed at intervals along the circumferential direction, and the bending direction of the flexible sleeve 472 can be adjusted by pushing, pulling or cooperatively pushing and pulling the multiple driving wires 474 . In some embodiments, the flexible sleeve 472 can be rotated about the axial direction, so that the bending direction of the flexible sleeve 472 can be adjusted to realize the bending of the growable tube 110 in multiple degrees of freedom directions.

17 illustrates a longitudinal cross-sectional view of the turning member 571 of the guide 570 according to some embodiments of the present disclosure. As shown in FIG. 17 , in some embodiments, the turning member 571 may further include a corrugated tube 572 , and the driving wire 573 may be disposed through the corrugated tube 572 or through the wall of the corrugated tube 572 (refer to FIG. 17 ) , the distal end of the driving wire 573 is fixedly arranged at the distal end of the corrugated tube 572, and the guide driving mechanism (eg, the guiding driving mechanism 180 or 280) pushes or pulls the driving wire 573 to drive the corrugated tube 572 to bend, thereby driving the growing Tube 110 (or 210, 310, 510) bends. It should be understood that the turning member includes but is not limited to the above-mentioned structures, and any structure that can be turned falls within the protection scope of the present disclosure.

The growable device 100 (or 200) may include any of the introducers 170-570. In some embodiments, as shown in FIG. 7, the introducer 170 (or 270-570) may further include a medical instrument 171, and the medical instrument 171 may be fixedly disposed at the distal end of the introducer 170, including, for example, an endoscope, a terminal surgery Actuators, ultrasonic probes, probes, etc. In some embodiments, the medical instrument 171 may be disposed in the internal channel of the introducer 170, such as a drug delivery device or the like.

The present disclosure also provides a surgical robotic system (not shown) that may include a system controller and the above-mentioned growable instrument 100 (or 200 ), the system controller being configured to control the movement of the growable instrument, for example, to control the growable instrument. The growth or retraction of the growth tube 100, or the advancement, turning or retraction of the guide 170, etc. are controlled. Due to the good flexibility of the growable device, it can grow and extend in real time, so it can be well adapted to the complex curved cavities, and can be widely used in the interventional diagnosis and treatment of various cavities.

The present disclosure also discloses the following:

1. A growable device comprising:

a growable tube comprising an inner layer, an outer layer, and a fluid cavity between the inner layer and the outer layer, the fluid cavity for containing a fluid;

The growable tube includes an expandable region at the distal end where the inner and outer layers are connected and expandable.

2. The growable device of clause 1, wherein the radial dimension of the proximal end of the outer layer is greater than or equal to the radial dimension of the distal end of the outer layer.

3. The growable device of item 1, wherein the radial dimension of the outer layer remains constant, decreases gradually, or decreases in steps extending from the proximal end to the distal end.

4. The growable device of item 1, wherein the radial dimension of the inner layer remains constant or gradually decreases from the proximal end to the distal extension direction.

5. The growable device of any one of items 1-4, wherein the outer layer is unfolded in the expandable region or the inner layer is unfolded outward at the expandable region .

6. The growable apparatus of any one of items 1-4, further comprising: a tube drive mechanism connected to the growable tube for driving the growable tube Either the outer layer or the inner layer moves.

7. The growable apparatus according to item 6, the tube driving mechanism comprising: a driving unit, a moving rod, and a transmission unit connected with the driving unit and the moving rod, the moving rod being connected with the growable The inner layer or the outer layer of the tube is sealed and connected, and the transmission unit is used for converting the rotational motion of the driving unit into a linear motion, so as to drive the moving rod to drive the growth or retraction of the growable tube.

8. The growable apparatus according to item 7, the transmission unit comprising: first and second rollers arranged side by side;

The proximal end of the moving rod is disposed between the first and second rollers and abuts against the first and second rollers, and the distal end of the moving rod is in contact with the inner layer or the inner layer of the growable tube. Outer sealing connection;

The driving units are respectively connected with the first and second rollers, and are used to drive the first and second rollers to rotate in opposite directions at a constant speed synchronously to drive the moving rod to move linearly.

9. The growable device according to item 7, wherein the transmission unit comprises: a screw-slider module, comprising a screw and a slider connected by a thread;

The proximal end of the moving rod is fixedly connected to the slider, and the distal end of the moving rod is sealingly connected to the inner or outer layer of the growable tube; and

The driving unit is connected with the screw rod, and is used for driving the screw rod to rotate so as to drive the moving rod to move linearly.

10. The growable device of item 6, further comprising a fluid controller;

The fluid controller is used to pressurize or depressurize the fluid to drive the fluid to fill the fluid cavity of the expandable region or to drive the fluid to withdraw from the fluid cavity.

11. The growable apparatus of item 10, further comprising: a fluid box including a fluid outlet channel, the outer layer of the growable tube being sealingly connected to the outer or inner perimeter of the fluid outlet channel , the inner layer of the growable tube extends toward the proximal end of the fluid tank through the fluid outlet channel for connection with the tube drive mechanism.

12. The growable apparatus of item 10, further comprising: a fluid tank including an annular fluid outlet channel, with at least one sealing ring disposed therein, the outer periphery of the sealing ring being in contact with the fluid. The inner wall of the box is sealingly fitted, the inner layer of the growable tube is sealingly connected to the annular wall of the inner ring of the fluid outlet channel, and the outer layer of the growable tube passes through the fluid outlet channel Extending to the proximal end of the fluid tank and being fastened to the sealing ring, the sealing ring is fastened to the tube driving mechanism, and the tube driving mechanism is used to drive the sealing ring to move linearly to drive the adjustable ring. Growth tubes grow or withdraw.

13. The growable apparatus of item 10, the tube drive mechanism being disposed outside the fluid tank or at least partially inside the fluid tank.

14. The growable apparatus of item 11 or 12, the fluid tank comprising a pressurized channel, the fluid controller in communication with the pressurized channel for pressurizing or depressurizing the fluid tank .

15. The growable apparatus of item 14, further comprising a pressure sensor for sensing pressure within the fluid tank.

16. The growable apparatus of any of items 1-4, the fluid being a liquid fluid or a gaseous fluid.

17. The growable device of any of items 1-4, the growable tube being made of a flexible material.

18. The growable device of any one of items 1-4, wherein the growable tube is circular or oval in cross section.

19. A surgical robotic system comprising a system controller and the growable instrument of any of items 1-18, the system controller being configured to control movement of the growable instrument.

Note that the above are merely exemplary embodiments of the present disclosure and applied technical principles. Those skilled in the art will understand that the present disclosure is not limited to the specific embodiments herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present disclosure. Therefore, although the present disclosure has been described in detail through the above embodiments, the present disclosure is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present disclosure. The scope is determined by the scope of the appended claims.

Claims

A growable device comprising:

a growable tube comprising an inner layer, an outer layer, and a fluid cavity between the inner layer and the outer layer, the fluid cavity for containing a fluid;

The growable tube includes an expandable region at the distal end where the inner and outer layers are connected and expandable.
The growable device of claim 1, wherein the proximal end of the outer layer has a radial dimension greater than or equal to the radial dimension of the distal end of the outer layer.
The growable device of claim 1, wherein the radial dimension of the outer layer remains constant, decreases gradually, or decreases in steps in a direction extending from the proximal end to the distal end.
The growable device of claim 1 , wherein the radial dimension of the inner layer remains constant or gradually decreases in a direction extending from the proximal end to the distal end.
The growable apparatus of claim 1, wherein the outer layer is inwardly unfolded at the unfoldable region or the inner layer is unfolded outwardly in the unfoldable region.
The growable apparatus according to claim 1, further comprising: a tube driving mechanism connected to the growable tube for driving the outer layer or the outer layer of the growable tube the inner movement.
The growable apparatus according to claim 6, wherein the tube driving mechanism comprises: a driving unit, a moving rod, and a transmission unit connected with the driving unit and the moving rod, and the moving rod is connected with the The inner layer or the outer layer of the growable tube is sealed and connected, and the transmission unit is used for converting the rotational motion of the driving unit into a linear motion, so as to drive the moving rod to drive the growable tube to grow or withdraw.
The growable apparatus according to claim 7, wherein the transmission unit comprises: first and second rollers arranged in parallel;

The proximal end of the moving rod is disposed between the first and second rollers and abuts against the first and second rollers, and the distal end of the moving rod is in contact with the inner layer or the inner layer of the growable tube. Outer sealing connection;

The driving units are respectively connected with the first and second rollers, and are used to drive the first and second rollers to rotate in opposite directions at a constant speed synchronously to drive the moving rod to move linearly.
The growable device according to claim 7, wherein the transmission unit comprises: a screw-slider module, comprising a screw and a slider connected by threads;

The proximal end of the moving rod is fixedly connected to the slider, and the distal end of the moving rod is sealingly connected to the inner or outer layer of the growable tube; and

The driving unit is connected with the screw rod, and is used for driving the screw rod to rotate to drive the moving rod to move linearly.
The growable device of claim 6, further comprising a fluid controller;

The fluid controller is used to pressurize or depressurize the fluid to drive the fluid to fill the fluid cavity of the expandable region or to drive the fluid to withdraw from the fluid cavity.
11. The growable apparatus of claim 10, further comprising: a fluid box, the fluid box including a fluid outlet channel, the outer layer of the growable tube being hermetically connected at the periphery of the fluid outlet channel or On the inner periphery, the inner layer of the growable tube extends through the fluid outlet channel toward the proximal end of the fluid tank for connection with the tube drive mechanism.
The growable device according to claim 10, further comprising: a fluid box, the fluid box comprising an annular fluid outlet channel, and at least one sealing ring is provided in the fluid box, the outer periphery of the sealing ring is connected to the surrounding fluid. The inner wall of the fluid box is sealed and fitted, the inner layer of the growable tube is sealingly connected to the annular wall of the inner ring of the fluid outlet channel, and the outer layer of the growable tube passes through the fluid The outlet channel extends toward the proximal end of the fluid tank and is fastened to the sealing ring, and the sealing ring is fastened to the tube driving mechanism, and the tube driving mechanism is used to drive the sealing ring to move linearly to drive the sealing ring. described growable tube growth or withdrawal.
11. The growable apparatus of claim 10, wherein the tube drive mechanism is disposed outside the fluid tank or at least partially disposed inside the fluid tank.
The growable apparatus of claim 11, wherein the fluid tank includes a pressurized channel, the fluid controller communicates with the pressurized channel for pressurizing or depressurizing the fluid tank .
15. The growable apparatus of claim 14, further comprising a pressure sensor for sensing pressure within the fluid tank.
The growable apparatus of claim 1, wherein the fluid is a liquid fluid or a gaseous fluid.
The growable apparatus of claim 1, wherein the growable tube is made of a flexible material.
The growable apparatus according to claim 1, wherein the cross section of the growable tube is circular or oval.
A surgical robot system, comprising:

Growable devices, including:

a growable tube comprising an inner layer, an outer layer, and a fluid cavity between the inner layer and the outer layer, the fluid cavity for containing a fluid;

the growable tube includes an expandable region at the distal end, the inner layer and the outer layer are connected and expandable at the expandable region; and

A system controller configured to control movement of the growable apparatus.