CN112869919B

CN112869919B - Medical measuring device and lung volume reduction system

Info

Publication number: CN112869919B
Application number: CN201911206925.0A
Authority: CN
Inventors: 陈泉; 李思漪; 李安宁
Original assignee: Shenzhen Lifetech Respiration Scientific Co Ltd
Current assignee: Shenzhen Lifetech Respiration Scientific Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2023-06-20
Anticipated expiration: 2039-11-29
Also published as: CN112869919A

Abstract

The invention relates to a medical measuring device and a lung volume reduction system, wherein the medical measuring device comprises a measuring tube assembly and a movable guide wire penetrating through the measuring tube assembly, the measuring tube assembly comprises a measuring tube and a sleeve nested outside the measuring tube, a measuring scale section is arranged on the outer surface of the measuring tube, and the guide wire drives the sleeve to slide on the measuring tube when moving. The invention has the beneficial effects that: the medical measuring device of application not only can make the length measurement of bronchus more convenient, the precision is higher, need not moreover to set up a plurality of metal development marks in the distal end of seal wire and can carry out length measurement to the bronchus, has avoided the risk that metal development mark drops in the organ, has improved medical measuring device's maneuverability and security.

Description

Medical measuring device and lung volume reduction system

Technical Field

The invention relates to the technical field of interventional medical instruments, in particular to a medical measuring device and a lung volume reduction system.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

At present, aiming at the treatment mode of emphysema, a lung volume reduction elastic coil is used as an implant body to be implanted into a lesion position of the lung of a human body. The lung volume-reducing elastic coil is designed and manufactured by nickel-titanium memory alloy wires and can elastically deform under the action of external force. The lung volume-reducing elastic coil can be implanted into the lung in a straight strip shape through the bronchoscope working channel under the constraint of the loading system (sheath), when the coil is conveyed into the bronchus of the emphysema area, the coil loses the constraint of the loading system, and resumes deformation to be changed into a natural shape (namely, the shape when the coil is not subjected to external force), meanwhile, the emphysema area is extruded under the traction action of the lung volume-reducing elastic coil, the gas in the bronchus is discharged, and the lung tissue volume of the emphysema area is reduced, so that the lung tissue with relatively healthy periphery can better exert physiological functions.

To select a suitable gauge of the lung volume-reducing elastic coil, a measurement guidewire is used to measure the bronchial length of the emphysema area prior to implantation. Fig. 1 shows a schematic structure of a prior art measuring guide wire 10', wherein a series of developing marks 11' are arranged at the distal end of the guide wire 10', the developing marks 11' are made of a material which is visible in X-ray transmission, such as Pt/Ir, and each group of developing marks 11' is 20mm apart, and an operator directly determines the distance measured by the measuring guide wire 11' according to the number of developing marks 11' exposed from the distal end of a pushing device (catheter). In use, the position of the guidewire 10' in the trachea is determined by monitoring the developed marker 11' on the guidewire 10' with a fluoroscopic imaging system. Fig. 2 shows that the prior art guidewire 10' is prone to perspective interference and ghosting when passing through the curved bronchi, and the smaller the radius of curvature, the more serious the interference, resulting in an operator's inability to accurately determine the number of exposed development marks 11' by the fluoroscopic imaging system.

Disclosure of Invention

The invention aims to solve the technical problem that an operator cannot accurately judge the number of developing marks on a guide wire in a lesion bronchus through an X-ray perspective imaging system in the prior art, and provides a medical measuring device and a lung volume reduction system capable of accurately measuring the length of the lesion bronchus.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a medical measuring device, including measuring the pipe subassembly, and mobilizable follow the seal wire that wears to establish in the pipe subassembly, the pipe subassembly includes measuring pipe and nest and be in the outside sleeve pipe of measuring pipe, the surface of measuring pipe is provided with the measurement scale section, the seal wire drives when removing the sleeve pipe is in slide on the measuring pipe.

In the medical measuring device of the present invention, the sleeve is provided with a mark for reading data of the measurement scale section.

In the medical measuring device of the invention, the proximal end of the measuring tube is provided with at least two elastic sheets which are distributed at intervals, and in a natural state, the elastic sheets incline in a direction away from the central line of the measuring tube along the direction from the distal end to the proximal end.

In the medical measuring device of the present invention, an anti-drop structure is provided between the sleeve and the measuring tube.

In the medical measuring device of the invention, the measuring tube comprises at least two measuring tube units which are nested with each other and can be movably connected, and each measuring tube unit is provided with a measuring scale section.

In the medical measuring device of the invention, the measuring tube comprises a first measuring tube unit and a second measuring tube unit which are adjacent, the second measuring tube unit is nested outside the first measuring tube unit, and when the first measuring tube unit and the second measuring tube unit are completely extended, the proximal end of the measuring scale section of the first measuring tube unit is aligned with the distal end of the measuring scale section of the second measuring tube unit.

In the medical measuring device, a limiting structure is arranged on the inner wall of a lumen of the sleeve, the sleeve is nested outside the second measuring tube unit, and when the proximal end of the second measuring tube unit is abutted to the limiting structure, the mark on the sleeve is aligned with the distal end of the measuring scale section of the second measuring tube unit.

In the medical measuring device of the invention, the guide wire comprises a handle and a main body section which are connected, the handle is connected with the sleeve, and the main body section is penetrated from the measuring tube assembly.

In the medical measuring device of the present invention, the medical measuring device further comprises a catheter, the measuring tube is detachably connected with the catheter, and the guide wire is penetrated from the catheter.

The invention also provides a lung volume reduction system comprising a medical measuring device as described above.

In summary, the medical measuring device and the lung volume reduction system provided by the invention have the following beneficial effects: the medical measuring device of this application not only can make the length measurement of bronchus more convenient, the precision is higher, need not moreover to set up a plurality of metal development marks in the distal end of seal wire and can carry out length measurement to the bronchus, has avoided the risk that the metal development mark drops in the organ, has improved medical measuring device's maneuverability and security.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic view of a prior art measuring guidewire;

FIG. 2 is a perspective view of a prior art measuring guidewire in a bent state;

FIG. 3 shows a medical measuring device according to an embodiment of the present invention;

FIG. 4 is a schematic view of a guidewire of a medical measurement device according to an embodiment of the present invention;

FIG. 5 is a schematic illustration of a measurement tube assembly according to one embodiment of the present invention;

FIG. 6 is a schematic view showing a partial structure of a measuring tube according to an embodiment of the present invention;

FIG. 7 is a partial A schematic view of a measurement scale segment on the measurement tube assembly shown in FIG. 5;

FIG. 8 is a schematic view of a partial B configuration of the measuring tube assembly shown in FIG. 5;

FIG. 9 is a partial schematic view of the sleeve of the measuring tube assembly shown in FIG. 5;

FIG. 10 is a partial schematic view of the sleeve of the measuring tube assembly shown in FIG. 5;

FIG. 11 is a schematic view of a plurality of measuring tubes in a contracted state according to an embodiment of the present invention;

FIG. 12 is a schematic view of a plurality of measuring tubes according to an embodiment of the present invention in an unfolded state;

FIG. 13 is a schematic view of a catheter according to an embodiment of the present invention;

FIG. 14 is a schematic view of a medical measurement device implanted in a bronchoscope according to an embodiment of the present invention;

fig. 15 is a schematic view showing a structure of a medical measuring device according to an embodiment of the present invention implanted in a bronchus.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "same", "outer", "inner", "left", "right" and the like are used herein for illustrative purposes only and do not represent the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the field of interventional medicine, it is common to define the end of the instrument proximal to the operator as the proximal end and the end distal to the operator as the distal end.

Example 1

As shown in fig. 3, the medical measuring device 100 of the present invention includes a guidewire 10, a measurement tube assembly 20, and a catheter 30.

Fig. 4 shows a schematic structural view of a guide wire 10, the guide wire 10 comprising a handle 11, a main body section 12, and a guide section 13.

The proximal end of the guide wire 10 is provided with a handle 11 which is convenient to push and hold, and the distal end of the handle 11 is provided with a section of external thread 111 which can form threaded connection with the internal thread of the sleeve 22 in the measuring tube assembly 20, so that the sleeve 22 can be driven to move on the measuring tube 21 when the guide wire 10 moves towards the bronchus waiting measuring body. It should be noted that the threaded connection between the handle 11 and the sleeve 22 is only a preferred embodiment, and is not limited to the connection between the handle 11 and the sleeve 22, for example, the handle 11 and the sleeve 22 may be connected by a snap connection, and such adjustment falls within the protection scope of the connection between the handle 11 and the sleeve 22 in this embodiment. It should be noted that, in other embodiments, the handle 11 and the sleeve 22 may not be connected, and when the handle 11 abuts against the sleeve 22, the handle 11 pushes the sleeve 22 to move on the measuring tube 21.

The main body section 12 of the guide wire 10 is formed by processing a metal wire with good elasticity and flexibility, and meanwhile, the pushing performance is good, wherein the pushing performance means that the main body section 12 has certain rigidity, when the guide wire 10 is pushed through the catheter 30, the guide wire 10 can be pushed along the hollow channel of the catheter 30, and the phenomenon that the push cannot be continuously carried out due to bending in a tube or human tissues caused by excessive bending in the pushing process due to excessively soft main body section 12 is avoided.

The guide section 13 is a soft section made of a polymer material having biocompatibility, such as silica gel, polytetrafluoroethylene, PEBA material, or other polymer materials. The head end of the guide section 13 is embedded with a developing structural member 14, when the guide wire 10 stretches into tissues such as bronchus in a human body, the guide section 13 can touch the inner wall of human tissues such as bronchus wall, and the like, because the guide section 13 is softer, bending deformation can occur, when an operator observes that the guide section 13 is bent and deformed according to X rays, the operator can judge that the guide wire 10 reaches a preset position. In addition, since the guide section 13 is relatively soft, any part of the guide section 13 does not bend sharply in the body, and thus, damage to human tissues such as bronchi due to sharp edges of the guide section 13 during bending deformation can be avoided. The guide section 13 and the main body section 10 may be connected by welding, bonding, splicing, or the like.

Fig. 5 shows a schematic structural view of a measuring tube assembly 20 in a medical measuring device 100, wherein the measuring tube assembly 20 comprises a measuring tube 21, a sleeve 22 and a connecting part 23, the sleeve 22 is movably nested outside the measuring tube 21, and the connecting part 23 is arranged at the distal end of the measuring tube 21.

As shown in fig. 5 and 6, the measuring tube 21 is of a hollow tube structure, the outer surface of the measuring tube 21 is provided with a measuring scale section 211, and the proximal end of the measuring tube 21 is provided with an elastic piece 212. The measuring tube 21 forms a nested structure with the sleeve 22, and the measuring tube 21 and the sleeve 22 are preferably in a clearance fit of 0.02-0.05, so that the sleeve 22 can slide freely on the measuring tube 21 in the axial direction.

As shown in fig. 7, the measurement scale section 211 is pre-engraved with a plurality of measurement mark lines, and the measurement accuracy of the medical measurement device 100 depends on the spacing between the plurality of measurement mark lines, and the plurality of measurement mark lines are preferably marked with equal spacing of 0.2cm or 0.5cm or 1cm, and the total length of the measurement scale section 211 is approximately 1.2-1.5 times the length of the waiting measurement body of the bronchus. A plurality of measurement mark lines may be provided on the measurement scale segment 211 using laser marking or other coating processes. Further, the plurality of measurement mark lines may be provided as a plurality of graduation lines at equal intervals or different color graduation lines provided at a certain interval. When the operator delivers the guide wire 10 into the lesion bronchus through the handle 11, the handle 11 pushes the sleeve 22 to slide on the measuring tube 21, and the operator can determine the delivery length of the guide wire 10 according to the sliding distance of the sleeve 22 on the measuring tube 21, so as to judge the length of the lesion bronchus.

As shown in fig. 6, the proximal end of the measuring tube 21 is provided with at least two elastic tabs 212, said at least two elastic tabs 212 being formed by cutting the tubing into two or more halves or similar cut at intervals, the elastic tabs 212 having a certain elasticity in the radial direction, which facilitates the fitting of the proximal end of the measuring tube 21 between the sleeve 22 and the main body section 12 of the guidewire 10. Meanwhile, the elastic sheet 212 is provided with a certain inclination angle a along the axial direction, preferably 3-5 degrees, that is, in a natural state, the elastic sheet 212 is in a horn shape, and the elastic sheet 212 is inclined along the direction from the far end to the near end, so that the near end of the elastic sheet 212 can be kept in contact with the inner wall of the sleeve 22, the sleeve 22 has damping sense in the sliding process of the sleeve 22 relative to the measuring tube 21, and an operator can conveniently operate the measuring tube assembly 20. Preferably, the proximal end of the elastic piece 212 is provided with a first protrusion 213, the first protrusion 213 being abutted to the inner wall of the sleeve 22, avoiding that the end of the measuring tube 21 damages the inner wall of the sleeve 22 during the relative sliding of the sleeve 22 and the measuring tube 21. The first protrusion 213 may be made of an elastic material such as silicone.

As shown in fig. 8 to 10, the sleeve 22 is also a hollow tube, and an anti-drop structure is provided between the sleeve 22 and the measuring tube 21 to prevent the measuring tube 21 from sliding off the sleeve 22. The drop-off prevention structure includes a second protrusion 221 provided at the distal end of the sleeve 22, and a first protrusion 213 provided on the measurement pipe 21. When the measuring tube 21 is embedded into the sleeve 22 during assembly, when the measuring tube 21 and the sleeve 22 relatively move to the position where the second protrusion 221 is abutted against the first protrusion 213, the second protrusion 221 and the first protrusion 213 cooperate to limit the measuring tube 21, so that the measuring tube 21 is prevented from sliding off from the sleeve 22. Specifically, the second protrusion 221 may be a plurality of protrusion points (see fig. 9) spaced apart, or may be an annular structure (see fig. 10) continuously disposed on the distal inner wall of the sleeve 22. In addition, the proximal end of sleeve 22, which mates with handle 11, is provided with a length of internal threads (as shown in FIG. 5) that threadably engage the distal external threads of handle 11.

It should be understood that the specific structure of the anti-falling structure is not limited in this embodiment, for example, in other embodiments, a clamping groove matched with the second protrusion 213 is provided on the measuring tube 21, and when the second protrusion 213 moves into the clamping groove, the measuring tube 21 and the sleeve 22 do not move relatively; alternatively, a third protrusion is provided on the measuring tube 21 at a location other than the proximal end, and when the second protrusion 221 abuts against the third protrusion, the measuring tube 21 and the sleeve 22 are not moved relatively.

As shown in fig. 11 and 12, the measuring tube 21 may also comprise two or more measuring tube units 201,202,203, in which case the total length of the measuring graduation segments 211 on the measuring tube 21 is equal to the sum of the measuring graduation segments on the two or more measuring tube units. By splitting the measuring tube 21 into a plurality of measuring tube units, the length of a single measuring tube unit can be reduced without reducing the effective measuring length, and the overall length of the measuring tube 21 can be adjusted by telescoping the plurality of measuring tube units. That is, the measuring tube 21 can measure both the bronchi in the longer emphysema region and the bronchi in the shorter emphysema region, thereby improving the adaptability of the measuring tube 21. And, when a plurality of measuring tube units are nested together, the overall length of the measuring tube 21 can be reduced, facilitating packaging and transportation of the product.

Specifically, the plurality of measuring pipe units are connected in sequence in a nested manner, the sleeve 22 is movably sleeved outside the outermost measuring pipe unit among the plurality of measuring pipe units, and the innermost measuring unit among the plurality of measuring pipe units is fixedly connected with the connecting portion 23.

In the embodiment shown in fig. 11 and 12, the measurement pipe 21 includes a first measurement pipe unit 201, a second measurement pipe unit 202, and a third measurement pipe unit 203. The first measuring tube unit 201 is connected to the connecting portion 23, the second measuring tube unit 202 is sleeved outside the first measuring tube 201, the third measuring tube unit 203 is sleeved outside the second measuring tube unit 202, and the third measuring tube unit 203 is embedded into the sleeve 22. Wherein the sleeve 22 is provided with a marking for reading the data of the measurement scale section 211, which marking may be a marking line imprinted on the sleeve 22 or an end of the sleeve 22, in this embodiment the marking is the distal end of the sleeve 22. When the plurality of measuring tube units are fully extended, i.e. the measuring tube 21 is no longer extendable, the proximal end of the measuring graduation segments of the first measuring tube unit 201 are aligned with the distal ends of the measuring graduation segments of the second measuring tube unit 202, and the proximal end of the measuring graduation segments of the second measuring tube unit 202 are aligned with the distal ends of the measuring graduation segments of the third measuring tube unit 203.

Further, the sleeve 22 and the inner wall of the lumen of each measuring tube unit are provided with a limiting structure (not shown). When the markings on the sleeve 22 are aligned with the distal ends of the measurement scale segments of the third measurement tube unit 203, the proximal end of the third measurement tube unit 203 abuts a stop structure within the sleeve 22 and the third measurement tube unit 203 and the sleeve 22 no longer continue to move relative to each other. Similarly, when the distal end of the measurement scale section of the third measurement pipe unit 203 is aligned with the distal end of the measurement scale section of the second measurement pipe unit 202, the proximal end of the second measurement pipe unit 202 abuts against the limiting structure in the third measurement pipe unit 203, and the second measurement pipe unit 202 and the third measurement pipe unit 203 do not continue to move relatively.

When measuring, the measuring tube units are fully extended until the measuring tube 21 cannot be extended any more, the handle 11 on the guide wire 10 pushes the sleeve 22 to slide on the third measuring tube 203, when the mark of the sleeve 22 slides to the distal end of the measuring scale section of the third measuring tube 203, the proximal end of the third measuring tube unit 203 is abutted to the limiting structure in the sleeve 22, and the third measuring tube unit 203 and the sleeve 22 do not move relatively any more; then, the sleeve 22 pushes the third measuring tube 203 to slide on the second measuring tube 202, when the distal end of the measuring graduation segment of the third measuring tube 203 is aligned with the distal end of the measuring graduation segment of the second measuring tube 202, the proximal end of the second measuring tube unit 202 abuts against the stopper structure within the third measuring tube unit 203, the second measuring tube unit 202 and the third measuring tube unit 203 no longer continue to move relatively, and then, the sleeve 22 pushes the third measuring tube 203 to slide on the first measuring tube 201 together with the second measuring tube 202. At this time, the conveying length of the guide wire 10 in the direction of the body to be measured such as the bronchus is the sum of the sliding distance of the sleeve 22 on the third measuring tube 203, the sliding distance of the third measuring tube 203 on the second measuring tube 202, and the sliding distance of the second measuring tube 202 on the first measuring tube 201, that is, the conveying length of the guide wire 10 is measured by the measuring tube assembly 20 in a cumulative manner.

Referring to fig. 5, 11 and 12 again, a screw structure with a certain length is provided on the connection portion 23, and when the measurement is performed, the connection portion 23 can be fastened with the catheter 30 through screw threads, so as to ensure that the end of the measurement tube 21 and the end of the catheter 30 keep a fitting state, so that the sliding distance of the sleeve 22 on the measurement tube 21 can accurately represent the conveying length of the guide wire 10 in the bronchus.

Fig. 13 shows a schematic structural view of a catheter 30, the proximal end of the catheter 30 being provided with a sleeve 31 and the distal end of the catheter 30 being provided with a developing mark 32. The catheter 30 is a hollow tube body with a single-layer or multi-layer structure, and the catheter 30 has good softness, self-lubricating performance and bending resistance. The proximal end of the sleeve 31 is provided with a length of internal thread which forms a detachable threaded connection with the external thread on the connection part 23 of the measuring tube 21. The visualization mark 32 at the distal end of the catheter 30 is an X-ray opaque metallic material such as gold, platinum, tantalum or the like. After the medical measuring device 100 completes the measurement, the connection between the sleeve 31 and the connection portion 23 is first released, the guide wire 10 is withdrawn from the body together with the measuring tube assembly 20, and then the lung volume-reducing elastic implant is delivered to the target site of the bronchus 300 through the catheter 30. Since the elastic implant for reducing the volume of the lung is necessarily implanted through the catheter during the subsequent implantation, the medical measuring device 100 of the embodiment directly conveys the catheter 30 to the target position during the measurement, and the catheter 30 does not need additional conveying operation, thereby simplifying the operation flow.

It should be noted that the threaded connection between the sleeve 31 and the connecting portion 23 is only a preferred embodiment, and is not limited to the detachable connection between the sleeve 31 and the connecting portion 23, for example, the sleeve 31 and the connecting portion 23 may be connected by a snap connection, and such adjustment falls within the protection scope of the connection between the sleeve 31 and the connecting portion 23 in this embodiment.

Fig. 14 shows a medical measurement device 100 for taking measurements within a bronchus 300. Before the measurement, the medical measuring device 100 is assembled, the guide wire 10 sequentially passes through the hollow tube cavities of the measuring tube assembly 20 and the catheter 30, then the external thread section on the connecting part 23 of the measuring tube assembly 20 is screwed into the sleeve 31 of the catheter 30, the relative movement between the catheter 30 and the measuring tube 21 on the measuring tube assembly 20 is avoided, and the proximal thread section of the sleeve 22 is screwed onto the distal external thread of the handle 11 on the guide wire 10 (at this time, the purpose of pushing the sleeve 22 can be realized by pushing the handle 11 of the guide wire 10). After the medical measuring device 100 is assembled, the bronchoscope 200 is delivered to the target site of the bronchus 300, and the catheter 30 and the guidewire 10 are delivered through the working channel 210 of the bronchoscope 200. When the distal end of the guidewire 10 reaches the distal end 220 of the bronchoscope 200 under observation with the aid of the visualization device, the first graduation mark a on the measuring tube 21 that is aligned with the marking of the cannula 22 at this time is read (the direction indicated by the arrow in the figure is the reading direction of the graduation mark).

As shown in fig. 15, the position of the catheter 30 is maintained and the guidewire 10 is then advanced. Since the guide wire 10 is inserted into the tissue such as the bronchus 300 in the human body, the guide section 13 touches the inner wall of the human tissue such as the bronchus wall, when the guide section 13 on the guide wire 10 is observed to start bending, which indicates that the guide wire 10 has reached the most distal position of the diseased bronchus 300, the second scale mark B aligned with the mark of the sleeve 22 on the measuring tube 21 is read again, and the length of the diseased bronchus 300 is obtained as B-ase:Sub>A, and the implant with the appropriate length is selected to be implanted into the diseased bronchus 300. After the measurement is completed, the catheter 30 is passed along the channel established by the guidewire 10 to the distal end of the guidewire 10, and then the guidewire 10 is withdrawn, and a lung volume-reducing elastic implant is implanted through the catheter 30 into the bronchi 300.

In the medical measuring device 100 of the embodiment, the guide wire 10 drives the sleeve 22 to slide on the measuring tube 21 in the process of moving towards the body to be measured, and the length of the guide wire 10 extending into the body to be measured is determined by the sliding distance of the sleeve 22 on the measuring tube 21, so that the purpose of measuring the length of the body to be measured is achieved. Because the measuring component (namely measuring tube assembly 20) of the medical measuring device is located outside the body, an operator can intuitively measure the length of the bronchus 300 outside the body, the length measurement of the bronchus 300 is more convenient and has higher precision, the implant with proper specification length can be selected more conveniently, the length measurement of the bronchus 300 can be carried out without arranging a plurality of metal developing marks at the far end of the guide wire 10, the risk that the metal developing marks fall off in an organ is avoided, the operability and the safety of the medical measuring device 100 are improved, meanwhile, the medical measuring device of the application conveys the guide wire 10 and the guide tube 30 to a target position, the operation flow is simplified, the manufacturing cost of the medical measuring device 100 is reduced, and the manufacturing process is simplified.

The invention also provides a lung volume reduction system comprising a lung volume reduction elastic implant, a delivery device matched with the lung volume reduction elastic implant, and the medical measurement device 100.

Example two

It should be noted that, in the first embodiment, the catheter 30 mainly has the function of implanting the lung volume-reducing elastic implant into the bronchus 300, but the catheter 30 has a small function when the medical measuring device 100 performs the length measurement on the diseased bronchus 300.

Thus, in the second embodiment, the medical measuring device 100 may also include only the guide wire 10 and the measuring tube assembly 20. The structure and operation of the guide wire 10 and the measuring tube assembly 20 of the medical measuring device 100 are similar to those of the embodiment, and will not be described in detail herein.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The utility model provides a medical measuring device, its characterized in that, medical measuring device includes the survey pipe subassembly, and movable follow wear to establish in the survey pipe subassembly the seal wire, the survey pipe subassembly includes survey pipe and nestification be in the outer sleeve pipe of survey pipe, the surface of survey pipe is provided with the measurement scale section, the seal wire drives when removing the sleeve pipe slides on the survey pipe, medical measuring device still includes the pipe, the distal end of survey pipe with the detachable connection of proximal end of pipe, the seal wire is followed wear to establish in the pipe.

2. The medical measurement device according to claim 1, wherein the cannula is provided with markings for reading the data of the measurement scale segments.

3. The medical measuring device according to claim 1, wherein the proximal end of the measuring tube is provided with at least two spaced apart resilient tabs which in a natural state are inclined in a distal to proximal direction away from the centre line of the measuring tube.

4. The medical measurement device according to claim 1, wherein an anti-slip structure is provided between the sleeve and the measurement tube.

5. The medical measuring device according to claim 1, characterized in that the measuring tube comprises at least two mutually nested and movably connected measuring tube units, each of which is provided with a measuring scale section.

6. The medical measurement device of claim 5, wherein the measurement tube comprises adjacent first and second measurement tube units, the second measurement tube unit nested outside the first measurement tube unit, a proximal end of a measurement scale segment of the first measurement tube unit aligned with a distal end of a measurement scale segment of the second measurement tube unit when the first and second measurement tube units are fully extended.

7. The medical measurement device according to claim 6, wherein the inner wall of the lumen of the cannula is provided with a limiting structure, the cannula being nested outside the second measurement tube unit, the markings on the cannula being aligned with the distal end of the measurement scale section of the second measurement tube unit when the proximal end of the second measurement tube unit is abutted to the limiting structure.

8. The medical measurement device of claim 1, wherein the guidewire comprises a handle connected to a body segment, the handle connected to the cannula, the body segment extending through the measurement tube assembly.

9. A lung volume reduction system comprising a medical measurement device according to any one of claims 1 to 8.