CN219661775U - Biopsy rotary cutting device - Google Patents

Abstract

The utility model discloses a biopsy rotary cutting device, and relates to the technical field of medical instruments. The technical scheme is characterized by comprising an outer tube, an inner tube, a handheld driving assembly and an outer tube fixing assembly; the outer tube and the inner tube respectively comprise an outer cutting edge of a saw tooth shape and an inner cutting edge of a flat blade shape; the external cutting window comprises an external cutting edge in the shape of a saw tooth; the handheld driving assembly comprises a first tube shell and a fixed tube which extends into the first tube shell and is clamped with the first tube shell; the outer tube fixing assembly comprises a second tube shell fixedly sleeved on the fixing tube, a supporting sleeve fixedly sleeved on the proximal end of the outer tube and a knob sleeve fixedly sleeved on the supporting sleeve; the utility model can better cut out tissues which are convenient for biopsy analysis, has simple structure, is convenient to assemble, can reduce cost and improves production efficiency.

Description

Biopsy rotary cutting device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a biopsy rotating device.

Background

In minimally invasive surgery, tissue resectors are often used in conjunction with endoscopes to resect diseased tissue within hollow organs, such as endometrial polyps, nasal polyps, and the like. Tissue resectors come in a variety of forms, including manual rotary resectors.

The manual rotary cutter comprises a cutting inner tube and a cutting outer tube, the distal ends of the cutting inner tube and the cutting outer tube are respectively provided with a cutting window, and the cutting inner tube is connected with the suction device. The outer cutting tube is kept still, the inner cutting tube is driven to rotate, then the lesion tissues can be resected by matching the inner cutting window with the outer cutting window, and the resected lesion tissues are sucked and discharged after entering the inner cutting tube. For example, a manual re-use router and planing system is disclosed in chinese patent publication No. CN217366007U, and a tissue resector and resecting system is disclosed in chinese patent publication No. CN 217338740U.

The existing manual rotary cutter is mainly used for cutting tissues, so that the cutting window usually selects inner saw teeth and outer saw teeth, but the cutting window of the inner saw teeth and the outer saw teeth can hardly keep the integrity of the tissues, that is, the resected pathological tissues are difficult to use for biopsy. Meanwhile, the assembly structure of the existing manual rotary cutter is complex, and the production cost is high.

Therefore, designing a manual rotary cutter which has a simple assembly structure and low production cost and can be used for biopsy of resected lesion tissues is a problem to be solved urgently.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a biopsy rotary cutting device which can better cut out tissues which are convenient to carry out biopsy analysis, has a simple structure, is convenient to assemble, can reduce the cost and improves the production efficiency.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a biopsy rotational atherectomy device, comprising:

an outer tube, the distal end of which is provided with an outer cutting window comprising an outer cutting edge in the form of a saw tooth;

the inner tube extends into the outer tube, an inner cutting window matched with the outer cutting window is arranged at the distal end of the inner tube, and the inner cutting window comprises a flat-blade inner cutting edge;

the handheld driving assembly comprises a first tube shell, a fixed tube which extends into the first tube shell and is clamped with the first tube shell, a rotating assembly arranged in the fixed tube, a fixed handle arranged on the outer side wall of the first tube shell and a movable handle hinged with the fixed handle; the rotating assembly comprises a screw fixedly sleeved on the inner tube, a screw sleeve sleeved on the screw, and a reset spring sleeved on the screw; the movable handle is connected with the screw sleeve and used for driving the screw sleeve to axially move; the proximal end of the first tube shell is provided with an attraction joint, and the proximal end of the inner tube is communicated into the attraction joint; the method comprises the steps of,

the outer tube fixing assembly comprises a second tube shell fixedly sleeved on the fixing tube, a supporting sleeve fixedly sleeved on the proximal end of the outer tube and a knob sleeve fixedly sleeved on the supporting sleeve; the distal end inside wall of second tube shell is provided with the flange, support sleeve's proximal end is provided with the interior sleeve pipe that is located the second tube shell, interior sleeve pipe and knob sleeve pipe press from both sides the flange in it.

Further, a first fixing ring plate which is clamped with the fixing pipe is arranged in the first pipe shell.

Further, the end face of the fixed pipe is provided with one or more back-off buckles, a limiting groove matched with a first fixed ring plate is formed between the back-off buckles and the end face of the fixed pipe, and a buckling hole matched with the back-off buckles is formed in the first fixed ring plate.

Further, a through groove is formed in the back-off, and the back-off is divided into two parts by the through groove.

Further, the proximal end of the inner tube extends into the suction joint, and a sealing ring in contact fit with the outer wall of the inner tube is arranged in the suction joint;

or the near end of the inner tube is fixedly sleeved with a transition tube which extends into the suction joint, and the outer wall of the transition tube is in clearance fit with the inner wall of the suction joint.

Further, the distal end inside wall of fixed pipe is provided with the fixed annular plate of second, first fixed annular plate and the fixed annular plate of second carry out axial spacing to the screw rod respectively.

Further, the proximal end of the screw rod passes through the first fixed ring plate, and the distal end of the screw rod passes through the second fixed ring plate; the distal end fixed sleeve of screw rod is equipped with the stop collar that is located the fixed pipe outside, be clearance fit along the axial between stop collar and the fixed annular plate of second.

Further, an auxiliary sealing tube is fixedly arranged between the outer tube and the support sleeve, and extends out of the knob sleeve.

Further, a key groove component extending along the axial direction is arranged between the knob sleeve and the support sleeve; the knob sleeve, the support sleeve and the outer tube can synchronously rotate relative to the second tube shell.

Further, an inner spigot matched with the fixed pipe is arranged in the second pipe shell.

In summary, the utility model has the following beneficial effects:

1. compared with other combination forms of cutting edges, the flat-blade type biopsy device has the advantages that the inner cutting edge is matched with the outer cutting edge of the saw tooth type, and tissues which are convenient for biopsy analysis can be better cut;

2. the handheld driving assembly and the outer tube fixing assembly can be assembled conveniently, and the outer tube fixing assembly and the handheld driving assembly can be assembled conveniently, so that the cost can be reduced, and the production efficiency can be improved;

3. the flange is clamped in the inner sleeve and the knob sleeve, so that the outer tube and the outer tube fixing assembly can be conveniently assembled; meanwhile, the knob sleeve is clamped and fixed, so that the support sleeve and the outer tube can be driven to synchronously rotate, the circumferential position of the external cutting window can be conveniently adjusted, and visual positioning is facilitated to hook target tissues.

4. The auxiliary sealing tube is matched with the sealing element on the endoscope, so that the sealing effect is improved, and the outer tube can keep a smaller outer diameter.

Drawings

FIG. 1 is a schematic view of a biopsy rotary cutting device according to an embodiment;

FIG. 2 is a schematic structural view of a biopsy rotational atherectomy device according to a second embodiment;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

FIG. 4 is an enlarged schematic view of portion B of FIG. 2;

FIG. 5 is a schematic structural view of a first fixing ring plate according to an embodiment;

FIG. 6 is a schematic view of a stationary tube and a rotating assembly according to an embodiment;

FIG. 7 is a schematic view of the structure of the screw sleeve according to the embodiment;

FIG. 8 is a schematic view of the structure of the outer cutting window in the embodiment;

FIG. 9 is a schematic view showing the structure of an inner cutting window in the embodiment;

FIG. 10 is a schematic diagram of an implementation of an internal cutting window in an embodiment;

FIG. 11 is a schematic view of another implementation structure of the inner cutting window in the embodiment;

fig. 12 is a schematic view showing the structure of the inner tube, the suction connector and the seal ring in the embodiment.

In the figure: 1. an outer tube; 11. a window is externally cut; 2. an inner tube; 21. cutting a window internally; 31. a first cartridge; 32. a fixed handle; 33. extending the support plate; 34. a movable handle; 341. a driving plate; 342. a drive hole; 35. a suction joint; 36. a first fixed ring plate; 361. a button hole; 4. a fixed tube; 41. reversing; 42. a limit groove; 43. a through groove; 44. a guide groove; 45. a second fixed ring plate; 51. a screw; 52. a screw sleeve; 521. a driving rod; 522. a driving groove; 53. a return spring; 54. a limit sleeve; 61. a second cartridge; 611. a flange; 62. a support sleeve; 621. an inner sleeve; 63. a knob sleeve; 64. an auxiliary sealing tube; 71. a transition pipe; 72. and (3) sealing rings.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

Examples

A biopsy rotational atherectomy device, referring to fig. 1-12, comprising an outer tube 1, an inner tube 2, a hand-held drive assembly, and an outer tube securing assembly; the distal end of the outer tube 1 is provided with an outer cutting window 11, and the outer cutting window 11 comprises a saw-tooth-shaped outer cutting edge; the inner tube 2 extends into the outer tube 1, the distal end of the inner tube 2 is provided with an inner cutting window 21 matched with the outer cutting window 11, and the inner cutting window 21 comprises a flat-blade inner cutting edge; the handheld driving assembly comprises a first tube shell 31, a fixed tube 4 extending into the first tube shell 31 and being clamped with the first tube shell, a rotating assembly arranged in the fixed tube 4, a fixed handle 32 arranged on the outer side wall of the first tube shell 31 and a movable handle 34 hinged with the fixed handle 32; the rotating assembly comprises a screw rod 51 fixedly sleeved on the inner tube 2, a screw sleeve 52 sleeved on the screw rod 51 and a reset spring 53 sleeved on the screw rod 51; the movable handle 34 is connected with the screw sleeve 52 and is used for driving the screw sleeve 52 to move axially; the proximal end of the first tube shell 31 is provided with a suction joint 35, and the proximal end of the inner tube 2 is communicated into the suction joint 35; the outer tube fixing assembly comprises a second tube shell 61 fixedly sleeved on the fixing tube 4, a supporting sleeve 62 fixedly sleeved on the proximal end of the outer tube 1 and a knob sleeve 63 fixedly sleeved on the supporting sleeve 62; the distal inner sidewall of the second cartridge 61 is provided with a flange 611, and the proximal end of the support sleeve 62 is provided with an inner sleeve 621 located within the second cartridge 61, the inner sleeve 621 and knob sleeve 63 sandwiching the flange 611.

Referring to fig. 1 to 12, an outer tube 1 is fixed, an inner tube 2 is rotated, and the two are matched to realize a cutting function; therefore, in the present embodiment, the inner cutting edge of the inner cutting window 21 is set to be a flat blade, which is beneficial to cutting out more complete tissues, thereby facilitating biopsy analysis; the outer cutting edge of the outer cutting window 11 is set to be a saw tooth shape, so that the tissue is hooked conveniently, and more complete tissue is cut conveniently; the suction connector 35 is connected with the suction device through a suction tube, so that the cut tissue enters the inner tube 2 from the inner cutting window 21 and then enters the suction tube, and then the tissue can be taken out for biopsy; that is, the flat-blade type inner cutting edge in the present embodiment is matched with the saw-tooth type outer cutting edge, so that tissue which is convenient for biopsy analysis can be cut better than other cutting edge combinations; specifically, in the present embodiment, the distal ends of the outer tube 1 and the inner tube 2 are both closed, the outer cutting window 11 is provided on the side wall of the outer tube 1, the inner cutting window 21 is provided on the side wall of the inner tube 2, and the inner tube 2 rotates relative to the outer tube 1 to perform the cutting action, so that two sides of the outer cutting window 11 extending in the axial direction are outer cutting sides, and two sides of the inner cutting window 21 extending in the axial direction are inner cutting sides; wherein, interior cutting edge includes the sword plane, and the sword plane can link up with the inside wall of inner tube, also can link up with the lateral wall of inner tube, and preferably, the sword plane of interior cutting edge links up with the lateral wall of inner tube, can reach better cutting effect like this.

Referring to fig. 1 to 12, in the present embodiment, the rotary assembly carrying the inner tube 2 is installed into the fixed tube 4, and then the fixed tube 4 is inserted into the first tube housing 31 and is clamped with the first tube housing 31, so that the assembly of the hand-held driving assembly can be conveniently realized; the second tube shell 61 of the outer tube fixing assembly is sleeved on the fixing tube 4, so that the outer tube fixing assembly and the handheld driving assembly can be conveniently assembled; meanwhile, in this embodiment, the inner tube 2 and the outer tube 1 may be assembled separately, that is, the inner tube 2 and the hand-held driving assembly may be assembled as one independent process, the outer tube 1 and the outer tube fixing assembly may be assembled as another independent process, the two independent processes may not interfere with each other, and finally the outer tube fixing assembly and the hand-held driving assembly may be connected to complete the assembly of the whole device; therefore, the biopsy rotary cutting device in the embodiment has a simple structure, is convenient to assemble, is beneficial to reducing the production cost and improving the production efficiency.

Referring to fig. 1 to 5, in this embodiment, the fixing tube 4 and the first tube shell 31 are connected by adopting a clamping manner, so that the connection is convenient, and the axial positioning and the circumferential positioning are facilitated to be simultaneously realized; that is, the structure can be simplified and the assembly is convenient by adopting the clamping connection; preferably, a first fixing ring plate 36 clamped with the fixing tube 4 is arranged in the first tube shell 31, and a clamping structure can be conveniently arranged by adopting the first fixing ring plate 36; specifically, the end surface of the fixed pipe 4 is provided with one or more back-off buckles 41, a limit groove 42 matched with the first fixed ring plate 36 is formed between the back-off buckles 41 and the end surface of the fixed pipe 4, and a buckle hole 361 matched with the back-off buckles 41 is formed in the first fixed ring plate 36; the fixed pipe 4 is extended into the first pipe shell 31 until the back-off 41 passes through the buckling hole 361, so that the first fixed ring plate 36 is embedded into the limit groove 42; the first fixed ring plate 36 is matched with the limiting groove 42, so that not only the axial limiting of the fixed pipe 4 and the first pipe shell 31, but also the circumferential limiting of the fixed pipe 4 and the first pipe shell 31 can be realized; specifically, in this embodiment, the end surface of the fixing tube 4 is provided with two inverted buckles 41 that are arranged oppositely, so that the connection stability can be improved; preferably, the back-off 41 is provided with a through groove 43, the through groove 43 divides the back-off 41 into two parts, at this time, each part of the back-off 41 has deformation capability, when the back-off 41 passes through the back-off hole 361, the two parts of the back-off 41 are close to each other, so that the back-off 41 can conveniently pass through the back-off hole 361; of course, in other alternative embodiments, other clamping structures may be used between the fixed tube 4 and the first tube shell 31, or between the fixed tube 4 and the first fixed ring plate 36, which are not limited herein.

Referring to fig. 1 to 3, in the present embodiment, the outer tube 1 is fixedly disposed in the support sleeve 62, then the support sleeve 62 is inserted into the second tube shell 61, and then the knob sleeve 63 is fixedly sleeved on the support sleeve 62; the assembly of the outer tube 1 and the outer tube fixing assembly can be conveniently realized by applying axial force so that the inner sleeve 621 and the knob sleeve 63 clamp the flange 611 therein; meanwhile, because the outer tube is clamped and fixed, the knob sleeve 63 is driven, so that the support sleeve 62 and the outer tube 1 can be driven to synchronously rotate, and the circumferential position of the outer cutting window 11 can be conveniently adjusted; preferably, a key slot assembly extending along the axial direction is arranged between the knob sleeve 63 and the support sleeve 62, so that the stability of the circumferential linkage of the knob sleeve 63 and the support sleeve 62 can be improved; preferably, an auxiliary sealing tube 64 is fixedly arranged between the outer tube 1 and the support sleeve 62, and the auxiliary sealing tube 64 extends out of the knob sleeve 63; the biopsy rotary cutting device of this embodiment is typically used with an endoscope, that is, the outer tube 1 needs to be passed through an instrument channel on the endoscope; therefore, the outer diameter of the outer tube 1 is designed to be small, but this may result in insufficient sealability between the outer tube 1 and the endoscope; the auxiliary sealing tube 64 is adopted to be matched with the sealing element on the endoscope in the embodiment, so that the sealing effect is improved, and the outer tube 1 can keep a smaller outer diameter; the length of the auxiliary sealing tube 64 extending from the knob sleeve 63 can be adjusted as required, and is not limited herein; in this embodiment, the second tube shell 61 is sleeved on the fixed tube 4 at one end far away from the first tube shell 31, preferably, an inner spigot matched with the fixed tube 4 is arranged in the second tube shell 61, and axial limit between the second tube shell 61 and the fixed tube 4 can be realized by adopting the inner spigot; in this embodiment, the second tube shell 61 and the fixed tube 4 are in transition fit, so that the connection stability can be improved by matching with an adhesive, thereby facilitating connection and reducing production cost.

Referring to fig. 1 to 12, the proximal end of the inner tube 2 extends into the suction fitting 35, and a seal ring 72 is provided in the suction fitting 35 in contact engagement with the outer wall of the inner tube 2, as shown in fig. 12; alternatively, the proximal end of the inner tube 2 is fixedly sleeved with a transition tube 71 extending into the suction joint 35, and the outer wall of the transition tube 71 is in clearance fit with the inner wall of the suction joint 35, as shown in fig. 4; preferably, in this embodiment, the sealing manner of the inner tube 2 and the sealing ring 72 is adopted, so that the sealing effect is better, and the sealing ring 72 causes resistance to the rotation of the inner tube 2, but has less influence.

Referring to fig. 1 to 7, specifically, the distal inner sidewall of the fixed tube 4 is provided with a second fixed ring plate 45, and the first fixed ring plate 36 and the second fixed ring plate 45 respectively axially limit the screw 51; one end of the return spring 53 is in contact with the first fixed ring plate 36, and the other end is in contact with the screw sleeve 52; the second fixed ring plate 45 can also play a limiting role on the threaded sleeve 52; preferably, a play for the screw rod 51 to move axially is formed between the first fixed ring plate 36 and the second fixed ring plate 45, that is, the screw rod 51 can move axially, so that the screw rod 51 can be prevented from being blocked; the proximal end of the screw rod 51 in this embodiment passes through the first fixed ring plate 36, and the distal end passes through the second fixed ring plate 45; the first fixed ring plate 36 plays a radial limiting role on the proximal end of the screw rod 51, and the second fixed ring plate 45 plays a radial limiting role on the distal end of the screw rod 51, so that the stability of the screw rod 51 can be improved; the distal end of the screw rod 51 is fixedly sleeved with a limit sleeve 54 positioned at the outer side of the fixed pipe 4, and the limit sleeve 54 is in clearance fit with the second fixed ring plate 45 along the axial direction; during installation, the screw rod 51 penetrates into the fixed pipe 4, and then the limiting sleeve 54 is sleeved at the end part of the screw rod 51, so that the screw rod 51 can be prevented from being separated from the fixed pipe 4, and subsequent assembly is facilitated; after the fixed pipe 4 is connected with the first pipe shell 31, the limiting sleeve 54 can also axially limit the screw rod 51, and the limiting sleeve 54 and the second fixed ring plate 45 are in clearance fit, so that the screw rod 51 can axially move.

Referring to fig. 1 to 7, in particular, an end of the fixed handle 32 remote from the first tube housing 31 is provided with an extension support plate 33, the extension support plate 33 being arranged parallel to the fixed tube 4; one end of the extension support 33 far away from the fixed handle 32 is hinged with the movable handle 34, so that the movable handle 34 can deflect around the hinge point; the outer side wall of the screw sleeve 52 is symmetrically provided with a driving rod 521, the driving rod 521 penetrates through the fixed tube 4, the fixed tube 4 is provided with a guide groove 44 extending along the axial direction, and the proximal end of the guide groove 44 is provided with an opening; the driving rod 521 is provided with a driving groove 522 positioned at the outer side of the fixed pipe 4; two symmetrically arranged driving plates 341 are arranged at one end, far away from the extension support plate 33, of the movable handle 34, and the two driving plates 341 clamp the fixed tube 4 in the driving plates; the driving plate 341 is provided with a driving hole 342, and the driving hole 342 is sleeved in the driving groove 522; when the movable handle 34 is pressed to rotate, the driving plate 341 can drive the threaded sleeve 52 to move along the axial direction because of the movable gap between the driving hole 342 and the driving groove 522; when the screw sleeve 52 moves along the axial direction, the screw rod 51 is driven to rotate forward, so that the inner tube 2 is driven to rotate forward; when the screw sleeve 52 moves proximally, the reset spring 53 is compressed, and after the movable handle 34 is released, the screw sleeve 52 moves distally under the elastic force of the reset spring 53, so that the screw rod 51 is driven to rotate reversely, and the inner tube 2 is driven to rotate reversely.

Claims (10)

1. A biopsy rotational atherectomy device, comprising:

an outer tube, the distal end of which is provided with an outer cutting window comprising an outer cutting edge in the form of a saw tooth;

the inner tube extends into the outer tube, an inner cutting window matched with the outer cutting window is arranged at the distal end of the inner tube, and the inner cutting window comprises a flat-blade inner cutting edge;

the handheld driving assembly comprises a first tube shell, a fixed tube which extends into the first tube shell and is clamped with the first tube shell, a rotating assembly arranged in the fixed tube, a fixed handle arranged on the outer side wall of the first tube shell and a movable handle hinged with the fixed handle; the rotating assembly comprises a screw fixedly sleeved on the inner tube, a screw sleeve sleeved on the screw, and a reset spring sleeved on the screw; the movable handle is connected with the screw sleeve and used for driving the screw sleeve to axially move; the proximal end of the first tube shell is provided with an attraction joint, and the proximal end of the inner tube is communicated into the attraction joint; the method comprises the steps of,

the outer tube fixing assembly comprises a second tube shell fixedly sleeved on the fixing tube, a supporting sleeve fixedly sleeved on the proximal end of the outer tube and a knob sleeve fixedly sleeved on the supporting sleeve; the distal end inside wall of second tube shell is provided with the flange, support sleeve's proximal end is provided with the interior sleeve pipe that is located the second tube shell, interior sleeve pipe and knob sleeve pipe press from both sides the flange in it.

2. The biopsy rotational atherectomy device of claim 1, wherein: a first fixing ring plate which is clamped with the fixing pipe is arranged in the first pipe shell.

3. The biopsy rotational atherectomy device of claim 1, wherein: the end face of the fixed pipe is provided with one or more back-off buckles, a limiting groove matched with a first fixed ring plate is formed between the back-off buckles and the end face of the fixed pipe, and a buckling hole matched with the back-off buckles is formed in the first fixed ring plate.

4. The biopsy rotational atherectomy device of claim 3, wherein: the back-off is provided with a through groove which divides the back-off into two parts.

5. The biopsy rotational atherectomy device of claim 1, wherein: the proximal end of the inner tube extends into the suction joint, and a sealing ring in contact fit with the outer wall of the inner tube is arranged in the suction joint;

or the near end of the inner tube is fixedly sleeved with a transition tube which extends into the suction joint, and the outer wall of the transition tube is in clearance fit with the inner wall of the suction joint.

6. The biopsy rotational atherectomy device of claim 2, wherein: the distal end inside wall of fixed pipe is provided with the fixed annular plate of second, first fixed annular plate and the fixed annular plate of second carry out axial spacing to the screw rod respectively.

7. The biopsy rotational atherectomy device of claim 6, wherein: the proximal end of the screw rod passes through the first fixed ring plate, and the distal end of the screw rod passes through the second fixed ring plate; the distal end fixed sleeve of screw rod is equipped with the stop collar that is located the fixed pipe outside, be clearance fit along the axial between stop collar and the fixed annular plate of second.

8. The biopsy rotational atherectomy device of claim 1, wherein: an auxiliary sealing tube is fixedly arranged between the outer tube and the support sleeve, and extends out of the knob sleeve.

9. The biopsy rotational atherectomy device of claim 1, wherein: a key groove component extending along the axial direction is arranged between the knob sleeve and the support sleeve; the knob sleeve, the support sleeve and the outer tube can synchronously rotate relative to the second tube shell.

10. The biopsy rotational atherectomy device of claim 1, wherein: an inner spigot matched with the fixed pipe is arranged in the second pipe shell.