CN112869919A

CN112869919A - Medical measuring device and lung volume reduction system

Info

Publication number: CN112869919A
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: 2021-06-01
Anticipated expiration: 2039-11-29
Also published as: CN112869919B

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 which penetrates through the measuring tube assembly, the measuring tube assembly comprises a measuring tube and a sleeve which is embedded 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 to set up a plurality of metal development marks in the distal end of seal wire moreover and can carry out length measurement to the bronchus, has avoided the metal to develop the risk that the 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 background information related to the present disclosure only 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 to be implanted into the pathological change position of the lung of a human body. The lung volume-reducing elastic coil is made of nickel-titanium memory alloy metal wires and can be elastically deformed under the action of external force. The lung volume-reducing elastic coil can be implanted into the lung in a straight strip shape through a bronchoscope working channel under the constraint of a loading system (sheath tube), when the coil is conveyed into a bronchus of an emphysema area, the coil loses the constraint of the loading system, the coil recovers deformation and becomes a natural shape (namely the shape without external force), meanwhile, an emphysema area is extruded under the traction action of the lung volume-reducing elastic coil, gas in the bronchus is discharged, the volume of lung tissues in the emphysema area is reduced, and therefore the peripheral relatively healthy lung tissues can better play physiological functions.

In order to select a lung volume-reducing elastic coil with a proper specification, before implantation, a measuring guide wire is adopted to measure the length of a bronchus in an emphysema area. Fig. 1 shows a schematic diagram of a prior art measuring guide wire 10 ', a series of visualization marks 11 ' are arranged at the distal end of the guide wire 10 ', the visualization marks 11 ' are made of a material visible through X-ray transmission, such as Pt/Ir, each set of visualization marks 11 ' is spaced apart by 20mm, and the operator directly determines the distance measured by the measuring guide wire 11 ' according to the number of visualization marks 11 ' exposed from the distal end of the pushing device (catheter). In use, the visualization marker 11 ' on the guidewire 10 ' is monitored by the radiographic imaging system to determine the position of the guidewire 10 ' in the trachea. Fig. 2 shows that when the guidewire 10 ' of the prior art passes through a bent bronchus, the visualization mark 11 ' arranged at the distal end is easy to generate interference and ghost images in perspective, and the interference is more serious when the bending radius is smaller, so that an operator cannot accurately judge the number of the exposed visualization marks 11 ' by an X-ray perspective 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 diseased bronchus through an X-ray perspective imaging system in the prior art, and provides a medical measuring device capable of accurately measuring the length of the diseased bronchus and a lung volume reduction system.

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

the utility model provides a medical measuring device, including survey buret subassembly to and mobilizable follow the seal wire of wearing to establish in the buret subassembly, survey buret subassembly includes survey buret and nests and is in survey the outside sleeve pipe of pipe, the surface of surveying buret is provided with measures the scale section, the seal wire drives when removing the sleeve pipe is in slide on the survey buret.

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 the elastic sheets are inclined to a direction far away from the central line of the measuring tube along the direction from the distal end to the proximal end under the natural state.

In the medical measuring device of the present invention, an anti-separation 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 mutually nested and movably connected measuring tube units, and each measuring tube unit is provided with a measuring scale section.

In the medical measuring device according to the invention, the measuring tube comprises a first measuring tube unit and a second measuring tube unit which are adjacent to each other, 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 fully 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, the inner wall of the lumen of the sleeve is provided with a limiting structure, 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, 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 penetrates through the measuring tube assembly.

In the medical measuring device of the present invention, the measuring tube is detachably connected to the catheter, and the guide wire is inserted through 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 of the present invention have the following advantages: the medical measuring device not only can enable the length measurement of the bronchus to be more convenient and have higher precision, but also can carry out the length measurement on the bronchus without arranging a plurality of metal developing marks at the far end of the guide wire, avoids the risk that the metal developing marks fall off in organs, and improves the operability and the safety of the medical measuring device.

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 refer to like parts throughout the drawings. In the drawings:

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

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

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

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

FIG. 5 is a schematic view of a gage tube assembly according to one embodiment of the invention;

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

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

FIG. 8 is a schematic view of a portion B of the gage tube assembly shown in FIG. 5;

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

FIG. 10 is a partial structural illustration of a casing in the measuring tube assembly shown in FIG. 5;

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

FIG. 12 is a schematic illustration of a plurality of measurement tubes in an expanded configuration according to an embodiment of the present invention;

FIG. 13 is a schematic structural 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 of a medical measurement device implanted in a bronchus according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" 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 as used herein are for illustrative purposes only and do not denote a unique 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. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the field of interventional medicine, it is generally defined that the end of the instrument proximal to the operator is the proximal end and the end distal to the operator is the distal end.

Example one

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

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

The proximal end of seal wire 10 is provided with handle 11 that the convenience was pushed, was held, and the distal end of handle 11 is provided with one section external screw thread 111, can form threaded connection with the internal thread of sleeve pipe 22 in surveying buret subassembly 20 to make seal wire 10 when waiting to measure body department to remove to the bronchus, can drive sleeve pipe 22 and remove on surveying buret 21. 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 also be connected in a snap-fit manner, and such an adjustment belongs to the protection scope of the connection between the handle 11 and the sleeve 22 in this embodiment. It should also be noted that in other embodiments, handle 11 may not be connected to sleeve 22, and when handle 11 abuts sleeve 22, handle 11 pushes sleeve 22 to move on measurement tube 21.

The main body section 12 of the guide wire 10 is formed by processing metal wires with good elasticity and flexibility, and meanwhile, the main body section 12 has good pushing performance, 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 a hollow channel of the catheter 30, and the phenomenon that the main body section 12 is too soft to cause excessive bending in the pushing process, so that the main body section is bent in a pipe or human tissues, and the continuous pushing cannot be performed is avoided.

The guiding section 13 is a flexible section made of a biocompatible polymer material, such as silicone, teflon, PEBA material, or other polymer materials. The developing structural member 14 is embedded in the head end of the guiding section 13, when the guide wire 10 extends into tissues such as bronchus in a human body, the guiding section 13 can touch the inner wall of the tissues such as the bronchus wall, and the like, and the guiding section 13 is relatively soft and can be bent and deformed, so that when an operator observes the bending and deformation of the guiding section 13 according to X-rays, the operator can judge that the guide wire 10 reaches a preset position. In addition, because the guide section 13 is relatively soft, any part of the guide section 13 does not bend sharply in the body, so that damage to human tissues such as bronchus and the like due to sharp edges and corners generated when the guide section 13 is bent and deformed can be avoided. The guide section 13 and the main body section 10 can be connected by welding, bonding, splicing, etc.

Fig. 5 shows a schematic view of a measurement tube assembly 20 of the medical measurement apparatus 100, the measurement tube assembly 20 includes a measurement tube 21, a sleeve 22 and a connecting portion 23, the sleeve 22 is movably nested outside the measurement tube 21, and the connecting portion 23 is disposed at a distal end of the measurement tube 21.

As shown in fig. 5 and 6, the measuring tube 21 is 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 and the sleeve 22 form a nested structure, and the measuring tube 21 and the sleeve 22 are preferably in clearance fit of 0.02-0.05, so that the sleeve 22 can freely slide on the measuring tube 21 along the axial direction.

As shown in fig. 7, a plurality of measurement mark lines are pre-engraved on the measurement scale section 211, the measurement accuracy of the medical measurement device 100 depends on the distance between the plurality of measurement mark lines, the plurality of measurement mark lines are preferably marked with equal intervals of 0.2cm, 0.5cm or 1cm, and the total length of the measurement scale section 211 is approximately 1.2-1.5 times of the length of the bronchial waiting measurement body. A plurality of measurement mark lines may be disposed on the measurement scale section 211 using a laser marking or other coating process. Further, the plurality of measurement mark lines may be provided as a plurality of scale lines at equal intervals or scale lines of different colors provided at certain intervals. When an operator conveys the guide wire 10 into a diseased 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 conveying 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 diseased bronchus.

As shown in fig. 6, the proximal end of the measurement tube 21 is provided with at least two elastic pieces 212, the at least two elastic pieces 212 are formed by cutting the tube into two or more pieces or similar spaced-apart cuts, and the elastic pieces 212 have a certain elasticity in the radial direction, which facilitates the fitting of the proximal end of the measurement tube 21 between the sleeve 22 and the main body segment 12 of the guide wire 10. Meanwhile, the elastic sheet 212 is provided with a certain inclination angle a along the axial direction, preferably 3-5 °, that is, in a natural state, the elastic sheet 212 is in a horn shape, and along the direction from the far end to the near end, the elastic sheet 212 inclines towards the direction far away from the central line of the measuring tube 21, so that the near end of the elastic sheet 212 can be ensured to be in contact with the inner wall of the sleeve 22, the sleeve 22 has damping feeling in the process of sliding 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, and the first protrusion 213 abuts against the inner wall of the sleeve 22 to prevent the end of the measuring tube 21 from damaging the inner wall of the sleeve 22 during the relative sliding between the sleeve 22 and the measuring tube 21. The first protrusion 213 may be made of an elastic material such as silicon.

As shown in fig. 8 to 10, the sleeve 22 is also a hollow tube, and a separation preventing structure is provided between the sleeve 22 and the measurement pipe 21 to prevent the measurement pipe 21 from sliding off the sleeve 22. The retaining structure includes a second protrusion 221 provided at the distal end of the sleeve 22, and a first protrusion 213 provided on the measurement tube 21. During the equipment, will survey buret 21 and imbed to sleeve pipe 22 in, when surveying buret 21 and sleeve pipe 22 relative movement to the protruding 221 of second and first protruding 213 looks butt, the protruding 221 of second and the cooperation of first protruding 213 can play limiting displacement to surveying buret 21, avoid surveying buret 21 landing in following sleeve pipe 22. Specifically, the second protrusion 221 may be a plurality of protrusion points distributed at intervals (see fig. 9), and may also be a ring-shaped structure continuously disposed on the inner wall of the distal end of the sleeve 22 (see fig. 10). In addition, the proximal end of the sleeve 22 that engages the handle 11 is provided with a length of internal threads (as shown in FIG. 5) that threadably engage the distal external threads of the handle 11.

It is understood that the embodiment does not limit the specific structure of the anti-slip structure, for example, in other embodiments, the measuring pipe 21 is provided with a slot cooperating with the second protrusion 213, when the second protrusion 213 moves into the slot, the measuring pipe 21 and the sleeve 22 do not move relatively; alternatively, the measurement tube 21 may be provided with a third protrusion at a position other than the proximal end, and when the second protrusion 221 abuts against the third protrusion, the measurement tube 21 and the sleeve 22 do not move 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. Through surveying buret 21 split into a plurality of survey buret units, a plurality of survey buret units can reduce the length of single survey buret unit under the condition that does not reduce effective measurement length, through the whole length of the mode adjustment survey buret 21 of a plurality of survey buret units of stretching out and drawing back. That is, measurement tube 21 can measure a bronchus in a long emphysema region and a bronchus in a short emphysema region, thereby improving the adaptability of measurement tube 21. Moreover, 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 measuring tube units are connected in series in a nested manner, the sleeve 22 is movably sleeved outside the outermost measuring tube unit of the measuring tube units, and the innermost measuring tube unit of the measuring tube units is fixedly connected with the connecting portion 23.

In the exemplary embodiment shown in fig. 11 and 12, the measuring tube 21 comprises a first measuring tube unit 201, a second measuring tube unit 202 and a third measuring tube unit 203. Wherein, first survey buret unit 201 is connected with connecting portion 23, and outside first survey buret 201 was located to second survey buret unit 202 cover, outside second survey buret unit 202 was located to third survey buret unit 203 cover, third survey buret unit 203 imbeds to the sleeve pipe 22 in. The sleeve 22 is provided with a mark for reading data of the measurement scale section 211, and the mark may be a mark line marked on the sleeve 22 or an end of the sleeve 22, and in this embodiment, the mark is a distal end of the sleeve 22. When the plurality of measurement tube units are fully extended, i.e. the measurement tube 21 is no longer extendable, the proximal end of the measurement scale section of the first measurement tube unit 201 is aligned with the distal end of the measurement scale section of the second measurement tube unit 202, and the proximal end of the measurement scale section of the second measurement tube unit 202 is aligned with the distal end of the measurement scale section of the third measurement 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 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 against a stop in sleeve 22 and the third measurement tube unit 203 and sleeve 22 no longer continue to move relative to each other. Similarly, when the distal end of the measurement scale segment of the third measurement tube unit 203 is aligned with the distal end of the measurement scale segment of the second measurement tube unit 202, the proximal end of the second measurement tube unit 202 abuts against the stop structure in the third measurement tube unit 203, and the second measurement tube unit 202 and the third measurement tube unit 203 no longer continue to move relative to each other.

During measurement, the plurality of measuring tube units are completely extended until the measuring tube 21 can not extend any more, the handle 11 on the guide wire 10 firstly pushes the sleeve 22 to slide on the third measuring tube 203, when the mark of the sleeve 22 slides to the far end of the measuring scale section of the third measuring tube 203, the near end of the third measuring tube unit 203 is abutted to the limit structure in the sleeve 22, and the third measuring tube unit 203 and the sleeve 22 can not move continuously; then, the sleeve 22 pushes the third measurement tube 203 to slide on the second measurement tube 202, when the distal end of the measurement scale section of the third measurement tube 203 is aligned with the distal end of the measurement scale section of the second measurement tube 202, the proximal end of the second measurement tube unit 202 abuts against the stop structure in the third measurement tube unit 203, the second measurement tube unit 202 and the third measurement tube unit 203 no longer continue to move relative to each other, and then the sleeve 22 pushes the third measurement tube 203 to slide together with the second measurement tube 202 on the first measurement tube 201. At this time, the conveying length of the guide wire 10 to the bronchial waiting measuring body direction 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 measuring tube assembly 20 achieves the purpose of measuring the conveying length of the guide wire 10 in an accumulative manner.

Referring to fig. 5, 11 and 12 again, the connecting portion 23 is provided with a threaded structure with a certain length, and when measurement is performed, the connecting portion 23 can be fastened and connected with the guide tube 30 through threads, so that the end of the measuring tube 21 and the end of the guide tube 30 are kept in a fit state, and thus the sliding distance of the sleeve 22 on the measuring 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 visualization marker 32. The guide tube 30 is a hollow tube body having a single-layer or multi-layer structure, and the guide tube 30 has good softness, self-lubricating property and anti-bending property. The proximal end of the sleeve 31 is provided with a length of internal thread for detachable threaded connection with an external thread on the connecting portion 23 of the measuring tube 21. The visualization marker 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 sleeve 31 is first disconnected from the connecting portion 23, and the guide wire 10 is withdrawn out of the body together with the measuring tube assembly 20, and then the lung volume-reducing elastic implant is delivered to the target position of the bronchus 300 through the catheter 30. Since the lung volume-reducing elastic implant must be implanted through a catheter during subsequent implantation, the medical measuring device 100 of the embodiment directly conveys the catheter 30 to the target position during measurement, and the catheter 30 does not need additional conveying operation, thereby simplifying the operation process.

It should be noted that, the screwing of the sleeve 31 and the connecting portion 23 is only a preferred embodiment, and the detachable connection manner of the sleeve 31 and the connecting portion 23 is not limited, for example, the sleeve 31 and the connecting portion 23 may also be connected in a snap-fit manner, and such an adjustment belongs to the protection scope of the connection manner of the sleeve 31 and the connecting portion 23 in this embodiment.

Fig. 14 shows a medical measurement device 100 that makes measurements in a bronchus 300. Before measurement, the medical measuring device 100 is assembled, the guide wire 10 sequentially passes through the hollow lumens of the measuring tube assembly 20 and the catheter 30, then the external thread section on the connecting portion 23 of the measuring tube assembly 20 is screwed into the sleeve 31 of the catheter 30, so that 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 achieved 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 position of the bronchus 300, and the catheter 30 and the guide wire 10 are delivered through the working channel 210 of the bronchoscope 200. When the distal end of the guide wire 10 reaches the distal end 220 of the bronchoscope 200 under observation with the aid of a visualization device, a first graduation mark a on the measurement tube 21, which is aligned with the mark of the sleeve 22 at that 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 then the guidewire 10 is advanced further. When 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 body 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 at this time is read again, so that the length of the diseased bronchus 300 is obtained as B-a, and thus an implant with a proper length is selected to be implanted into the diseased bronchus 300. After the measurement is completed, the catheter 30 is guided along the channel established by the guide wire 10 to the distal end of the guide wire 10, then the guide wire 10 is withdrawn, and the lung volume-reducing elastic implant is implanted into the bronchus 300 through the catheter 30.

In the measurement process of the medical measurement device 100 of the embodiment, the guide wire 10 drives the sleeve 22 to slide on the measurement tube 21 in the process of moving to the body to be measured, and the length of the guide wire 10 extending to the body to be measured is determined by the sliding distance of the sleeve 22 on the measurement tube 21, so that the purpose of measuring the length of the body to be measured is achieved. Because the measuring component (namely the measuring tube component 20) of the medical measuring device is positioned outside the body, an operator can visually measure the length of the bronchus 300 outside the body, the length measurement of the bronchus 300 can be more convenient, the precision is higher, the selection of an implant with a proper specification length is more facilitated, the length measurement of the bronchus 300 can be realized 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 organs is avoided, the operability and the safety of the medical measuring device 100 are improved, and meanwhile, the guide wire 10 and the catheter 30 are conveyed to a target position by the medical measuring device, 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 associated with the lung volume reduction elastic implant, and a medical measuring device 100 as described above.

Example two

It should be noted that the catheter 30 of the first embodiment mainly functions to implant the lung volume-reducing elastic implant into the bronchus 300, but the catheter 30 does not function much when the medical measuring device 100 measures the length of the diseased bronchus 300.

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

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to 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 to and mobilizable follow the seal wire of wearing to establish in the survey pipe subassembly, the survey pipe subassembly is including surveying buret and nestification measure the outside sleeve pipe of pipe, the surface of surveying buret is provided with measures the scale section, the seal wire drives when removing the sleeve pipe is in slide on the survey buret.

2. The medical measuring device of claim 1, wherein the sleeve is provided with indicia for reading data of the measuring scale segments.

3. The medical measuring device as defined in claim 1, wherein the proximal end of the measuring tube is provided with at least two elastic pieces spaced apart, the elastic pieces being inclined away from the center line of the measuring tube in a distal to proximal direction in a natural state.

4. The medical measuring device of claim 1, wherein a retaining structure is provided between the sleeve and the measurement tube.

5. The medical measuring device as defined in claim 1, wherein said measuring tube comprises at least two measuring tube units nested and movably connected to each other, each of said measuring tube units being provided with a measuring scale section.

6. The medical measuring device as defined in claim 5, wherein the measuring tube includes adjacent first and second measuring tube units, the second measuring tube unit being nested outside the first measuring tube unit, the proximal end of the measuring scale section of the first measuring tube unit being aligned with the distal end of the measuring scale section of the second measuring tube unit when the first measuring tube unit and the second measuring tube unit are fully extended.

7. The medical measuring device of claim 6 wherein the inner wall of the lumen of the sleeve is provided with a stop structure, the sleeve being nested outside the second measuring tube unit, the markings on the sleeve being aligned with the distal end of the measuring scale section of the second measuring tube unit when the proximal end of the second measuring tube unit abuts the stop structure.

8. The medical measurement device of claim 1, wherein the guidewire includes a handle and a body segment connected, the handle being connected to the cannula, the body segment being threaded from the measurement tube assembly.

9. The medical measurement device of claim 1, further comprising a catheter, wherein the measurement tube is removably coupled to the catheter, and wherein the guidewire is threaded through the catheter.

10. A lung volume reduction system comprising a medical measuring device according to any of claims 1 to 9.