Measuring device

Abstract

The present invention provides a measuring device, comprising a hollow catheter and a guide wire that can be inserted into the hollow catheter, a catheter developing structure is provided on the catheter, the distance between the catheter developing structure and the distal end of the catheter is less than the length of the diseased tissue, a guide wire developing structure is provided on the distal end of the guide wire, a scale marking area is provided on the guide wire, the proximal end of the catheter can fall into the scale marking area, and the scale marking area is used to directly or indirectly measure the distance between the proximal end of the catheter and the end of the guide wire. The measuring device of the present invention can be used to directly or indirectly measure the distance between the proximal end of the catheter and the end of the guide wire according to the scale marking area, and then measure the length of the diseased tissue.

Description

Technical Field

[0001] The invention belongs to the field of medical instruments, and in particular relates to a measuring device. Background Art

[0002] At present, a newer treatment method is used for emphysema, that is, an elastic coil (such as a lung volume reduction elastic coil) is implanted as an implant into the lesion site of the human lung. The lung volume reduction elastic coil is designed and made of nickel-titanium memory alloy wire, which is in a curved shape in the natural state. The lung volume reduction elastic coil can undergo elastic deformation under the action of external force. For example, under the constraint of the loading system, the lung volume reduction elastic coil can be in a straight strip shape, so as to be implanted into the lung through the working channel of the bronchoscope. When the lung volume reduction elastic coil is delivered to the bronchus in the emphysema area, the lung volume reduction elastic coil loses the constraint of the loading system and recovers the deformation to a natural shape (i.e., the shape when not subject to external force) of the curved shape. At the same time, the emphysema area is squeezed under the pulling action of the lung volume reduction elastic coil, the gas in the bronchus is discharged, and the volume of the lung tissue in the emphysema area is reduced, so that the surrounding relatively healthy lung tissue can better perform its physiological function.

[0003] Before implantation, a measuring guide wire is used to measure the length of the bronchus in the emphysema area to determine the specifications of the lung volume reduction elastic coil. Summary of the invention

[0004] The object of the present invention is to provide a measuring device, aiming to solve the problem in the prior art that a measuring device is needed to determine the specifications of an implant.

[0005] The present invention is implemented as follows: a measuring device is provided for measuring the length of diseased tissue to determine the specifications of an implant, the measuring device comprising a catheter and a guide wire, the catheter being a hollow tube structure, a catheter developing structure being provided on the catheter, the length between the catheter developing structure and the distal end of the catheter not exceeding the axial length corresponding to the minimum specification of the implant; the guide wire can be inserted into the catheter, a guide wire developing structure is provided on the distal end of the guide wire, a scale marking area is provided on the guide wire, the proximal end of the catheter can fall into the scale marking area, the scale marking area is used to directly or indirectly measure the length between the catheter developing structure and the guide wire developing structure to determine the specifications of the implant.

[0006] In one embodiment, the length of the catheter is a, and the scale marking area is used to measure the length between the catheter developing structure and the guide wire developing structure. A plurality of scales are provided in the scale marking area. The one located at the farthest end in the scale marking area among the plurality of scales is a reference marking point, and the scale farthest from the reference marking point among the plurality of scales is a terminal marking point. The length between the reference marking point and the guide wire developing structure is b, and the length between the reference marking point and the terminal marking point is f, and a≤b+f.

[0007] In one embodiment, the catheter visualization structure is located at the distal end of the catheter, and b=a.

[0008] In one embodiment, the minimum size of the implant corresponds to an axial length c, a≥bc.

[0009] In one embodiment, the length between the reference mark and its nearest scale mark is equal to the axial length corresponding to the smallest size implant.

[0010] In one embodiment, the length between any scale among the multiple scales except the reference mark point and the reference mark point is equal to the axial length of an implant of one specification.

[0011] In one embodiment, a plurality of scales are arranged at equal intervals.

[0012] In one embodiment, the catheter visualization structure is located at the distal end of the catheter.

[0013] In one embodiment, the length from the proximal end of the catheter to the catheter developing structure is a, and the size range of a is 900 mm to 950 mm.

[0014] In one embodiment, when the measuring device measures the diseased tissue, the guidewire developing structure is aligned with the distal end of the diseased tissue, and the catheter developing structure is aligned with the proximal end of the diseased tissue, the proximal end of the catheter can fall into the scale mark area.

[0015] When the measuring device provided by the present invention is used for measurement, the guide wire is inserted into the catheter and then implanted as a whole into the tubular channel of the diseased tissue. The guide wire is pushed so that the guide wire development structure is aligned with the distal end of the diseased tissue, and the catheter is pushed so that the catheter development structure is aligned with the proximal end of the diseased tissue. In this way, the length between the guide wire development structure and the catheter development structure is directly or indirectly converted into the length of the diseased tissue through the scale markings, thereby determining the specifications of the implant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional schematic diagram of a measuring device provided by an embodiment of the present invention;

[0017] Figure 2 is a three-dimensional schematic diagram of a catheter of a measuring device provided in an embodiment of the present invention;

[0018] Figure 3 is a three-dimensional schematic diagram of a first embodiment of a guide wire of a measuring device provided in an embodiment of the present invention;

[0019] Figure 4 yes Figure 3 An enlarged schematic diagram of the S part;

[0020] Figure 5 is a schematic structural diagram of a guide wire of a measuring device provided in an embodiment of the present invention;

[0021] Figure 6 is a three-dimensional schematic diagram of another embodiment of a guide wire of a measuring device provided in an embodiment of the present invention;

[0022] Figure 7 yes Figure 6 An enlarged schematic diagram of part G;

[0023] Figure 8 is a schematic diagram of the guide wire reaching the distal end of the bronchus when the measuring device provided in an embodiment of the present invention is performing measurement;

[0024] Fig. 9 yes Figure 8 An enlarged schematic diagram of part A;

[0025] Fig.10 yes Figure 8 An enlarged schematic diagram of part B;

[0026] Fig.11 A schematic diagram of the case where the catheter reaches the distal end of the working channel of the bronchoscope when the measuring device provided in an embodiment of the present invention is measuring;

[0027] Fig.12 yes Fig.11 An enlarged schematic diagram of part C;

[0028] Fig.13 yes Fig.11 An enlarged schematic diagram of part D;

[0029] Fig.14 is a schematic diagram of a situation in which the end cap of the catheter of the measuring device provided by an embodiment of the present invention is located in the corresponding scale mark area of ​​the guide wire;

[0030] Fig.15 is a measurement principle diagram of a measurement device provided by an embodiment of the present invention;

[0031] Fig.16 A schematic diagram of the case where the distal end of the catheter reaches the distal end of the guide wire and is flush with the distal end of the guide wire when the measuring device provided in an embodiment of the present invention is measuring;

[0032] Fig.17 yes Fig.16 An enlarged schematic diagram of part E of FIG.

[0033] Fig.18 yes Fig.16 An enlarged schematic diagram of part F. Specific embodiments

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0036] It should also be noted that the directional terms such as left, right, up, and down in this embodiment are merely relative concepts or are based on the normal use status of the product and should not be considered as restrictive.

[0037] like Figures 1 to 16 1 and 2 are schematic diagrams of a measuring device provided in an embodiment of the present invention and various related schematic diagrams of measuring the length of diseased tissue using the measuring device.

[0038] Specifically, Figure 1 FIG. 1 is a schematic diagram of a measuring device 100 provided in an embodiment of the present invention. The measuring device 100 is used to measure the length of the diseased tissue to determine the specifications of the implant. Figure 8 As shown in the figure, the medical tube mirror 3 can be a bronchoscope) and an X-ray development device (the X-ray development device is not shown in the figure, and the X-ray development device can be a DSA device) are used together to measure the length of the diseased tissue in the tubular channel (such as the bronchus), thereby determining the specifications of the implant.

[0039] The measuring device 100 comprises a catheter 1 and a guide wire 2 which can be inserted into the catheter 1 , wherein the guide wire 2 is used to guide the catheter 1 to be pushed in the body.

[0040] like Figure 2 As shown, the catheter 1 is a hollow tube structure, and the catheter 1 includes a catheter body 12 located at the distal end thereof, and an end cap 13 provided at the proximal end of the catheter body 12, and the catheter body 12 is fixedly connected to the end cap 13. The catheter body 12 is a hollow tube body with a single-layer or multi-layer structure, and is fastened to the end cap 13 by gluing or other means. The catheter 1 has good softness, self-lubricating properties and anti-bending properties. In order to ensure that the catheter 1 can be pushed freely in the bronchoscope, the maximum outer diameter of the catheter body 12 needs to be smaller than the inner diameter of the working channel of the bronchoscope.

[0041] The catheter 1 is provided with a catheter developing structure 11 to facilitate observation of the position of the catheter 1 in human tissue by an X-ray developing device. In this embodiment, the catheter developing structure 11 is provided at the distal end of the catheter body 12 (i.e., the distal end of the catheter 1). When the catheter developing structure 11 is provided at the distal end of the catheter body 12, the position of the catheter developing structure 11 can be simultaneously observed when observing the end of the catheter body 12, so that the position of the catheter developing structure 11 in the human tissue can be more conveniently checked and the length of the diseased tissue can be more conveniently measured. During measurement, the catheter developing structure 11 is aligned with the proximal end of the diseased tissue.

[0042] Of course, in other embodiments, the catheter development structure 11 can also be set at a position with a certain length away from the distal end of the catheter 1, as long as the length between the catheter development structure 11 and the distal end of the catheter 1 does not exceed the axial length corresponding to the minimum size of the implant. In this way, it can be avoided that the distal end of the catheter 1 conflicts with the inner wall of the human tissue before the catheter development structure 11 reaches the target position to be measured. The implant in this embodiment is a lung volume reduction elastic coil, which has a curled natural form and a straight delivery form. The axial length corresponding to the minimum size in this embodiment refers to the axial length of the lung volume reduction elastic coil with the minimum size when it is in a straight delivery form.

[0043] See also Figure 2 , the length between the proximal end surface of the end cap 13 of the catheter 1 and the catheter developing structure 11 is defined as a, that is, the length of the catheter 1 is a, and the length a is a known data after the manufacturing is completed. As a preferred embodiment, the size range of a can be 900mm to 950mm.

[0044] like Figure 3 and Figure 4 As shown, the guidewire 2 includes a guidewire body 20 located at the distal end thereof and a handle 21 provided at the proximal end of the guidewire body 20 , and the guidewire body 20 and the handle 21 are fixedly connected.

[0045] Specifically, the handle 21 has the performance of being convenient to push and hold, and can be generally made of stainless steel or medical plastic.

[0046] The distal end of the guide wire body 20 is provided with a guide wire development structure 201 to facilitate observation of the position of the guide wire 2 in the human tissue by an X-ray development device. During measurement, the guide wire development structure 201 is aligned with the distal end of the diseased tissue. It should be noted that due to the insufficient processing accuracy of the existing process, processing errors may occur, such as the guide wire development structure 201 not being at the distal end of the guide wire body 20. Therefore, if the length between the guide wire development member 201 and the distal end of the guide wire body 20 does not exceed 3 mm, the guide wire development member 201 should be regarded as being arranged at the distal end of the guide wire body 20.

[0047] A scale marking area S is provided on the proximal side of the guidewire body 20 , and the scale marking area S is used to directly or indirectly measure the length between the catheter development structure 11 and the end of the guidewire development structure 201 .

[0048] The guidewire development structure 201 and the catheter development structure 11 may be made of metal materials that are opaque to X-rays, such as gold, platinum, tantalum and the like.

[0049] refer to Figures 3 to 5 When the measuring device 100 is in use, the guidewire developing structure 201 is aligned with one end (i.e., the distal end) of the diseased tissue, and the catheter developing structure 11 is aligned with the other end (i.e., the proximal end) of the diseased tissue, the proximal end of the catheter 1 can fall into the scale mark area S, and the scale mark area S is located outside the patient's body during measurement.

[0050] Specifically, since the catheter developing structure 11 in this embodiment is disposed at the distal end of the catheter 1, the measuring device of this embodiment only needs to calculate the length between the two developing structures (the guidewire developing structure 201 and the catheter developing structure 11) by subtracting the length of the catheter 1 from the length between the proximal end of the catheter 1 and the guidewire developing structure 201. The length between the two developing structures is equal to the length of the diseased tissue, so that the appropriate implant specifications can be selected to perform treatment, such as treating emphysema. It should be noted that, since the length between the position of the scale mark area S and the guidewire developing structure 201 is known data when the guidewire is manufactured, the length between the proximal end of the catheter 1 and the guidewire developing structure 201 can be obtained based on the reading of the scale mark area S.

[0051] Of course, if the catheter developing structure 11 is arranged at a position with a certain length from the distal end of the catheter 1, since the distance L between the proximal end of the catheter and the catheter developing structure 11 is known after the catheter 1 is manufactured (not shown in the figure, the distance L is a known data when the catheter is manufactured at the factory), when measuring, it is only necessary to subtract the distance L from the proximal end of the catheter 1 to the guide wire developing structure 201 to calculate the distance between the two developing structures (the guide wire developing structure 201 and the catheter developing structure 11).

[0052] Here, the use of the measuring device 100 to measure the length of the bronchial lesion tissue is described as an example. First, the medical bronchoscope 3 is pushed along the trachea to the proximal end of the bronchial lesion tissue. Specifically, the distal end of the bronchoscope 3 is delivered to the opening of the subsegmental bronchus (i.e., the proximal end of the lesion site), and the guide wire 2 is inserted into the catheter 1 in vitro to form an assembly. Place the component into the working channel of the bronchoscope 3, keep the position of the catheter 1, push the guide wire 2 toward the distal end and make the guide wire development structure 201 contact the bronchial wall (that is, the guide wire development structure 201 is flush with the distal end of the diseased tissue), then keep the position of the guide wire 2, push the catheter 1 toward the distal end along the guide wire 2, so that the catheter development knot 11 on the catheter 1 is flush with the proximal end of the diseased tissue (because the distal end of the bronchoscope 3 is flush with the proximal end of the diseased tissue, it is only necessary to flush the catheter development knot 11 with the distal end of the bronchoscope 3), at this time, the proximal end of the catheter 1 falls into the scale mark area S, and then the distance between the two development structures is calculated based on the above-mentioned known length data.

[0053] Since the measuring device 100 provided by the present invention does not arrange a large number of imaging structures at equal intervals at the distal end of the guide wire body 20 of the guide wire 2, the problem of measurement failure or inaccurate measurement caused by interference of multiple imaging structures when the guide wire is bent can be avoided. Moreover, since the imaging structures are relatively few compared with the prior art, the risk of metal imaging structures falling off in the organ can be greatly reduced, thereby improving the operability and safety of the operation.

[0054] In this embodiment, the scale marking area S is used to directly or indirectly measure the distance between the catheter development structure 11 and the guidewire development structure 201, and the distance is the length of the diseased tissue. A plurality of scales are provided in the scale marking area S. Among the plurality of scales in this embodiment, the one located at the farthest end in the scale marking area S is the reference mark point 22. Among the plurality of scales, the scale farthest from the reference mark point 22 is the final mark point 24. The length between the reference mark point 22 and the final mark point 24 is f. The portion of the guidewire body 20 from the distal end of the guidewire body 20 to the reference mark point 22 is the main section 202. The guidewire development structure 201 is provided at the distal end of the main section 202, so as to observe the position of the guidewire development structure 201 and measure the length of the diseased tissue.

[0055] The main body section 202 can be made of a metal wire with good elasticity and flexibility, and also has good pushing properties. The pushing properties here refer to: the main body section 202 has a certain rigidity. When the guide wire 2 is pushed through the catheter 1, the guide wire 2 can be pushed along the hollow channel of the catheter 1. It will not be excessively bent during the pushing process due to the main body section 202 being too soft, causing bending in the tube or in human tissue, and being unable to continue to be pushed.

[0056] The distal end of the main body segment 202 is made of a biocompatible polymer material, such as silicone, polytetrafluoroethylene, PEBA material or other polymer materials. The main body segment 202 can be made harder from the distal end to the proximal end by adjusting the manufacturing process.

[0057] In one embodiment, the guidewire imaging structure 201 can be embedded in the distal end of the main section 202. When the guidewire 2 is inserted into the bronchus and other tissues in the human body, the distal end of the main section 202 of the guidewire 2 touches the inner wall of the bronchial wall and other human tissues. Since the distal end is relatively soft, it will bend first, while the proximal end will bend less. The operator can more intuitively observe the bending degree of the distal end of the main section 202 with the X-ray imaging device, and then judge whether the guidewire 2 has reached the predetermined position. Similarly, the catheter imaging structure 11 can also be arranged in this way.

[0058] In this embodiment, the length dimension between the guidewire development structure 201 and the reference mark point 22 is b. After manufacturing, the length b is a known length, and the size range of b is 850mm to 1050mm. The length between the reference mark point 22 and the distal end of the guidewire development structure 201 is less than or equal to the length of the catheter 1 (i.e., b≤a), and the length between the final mark point 24 and the distal end of the guidewire development structure 201 is greater than the length of the catheter 1. It should be noted that the catheter 1 and the guidewire 2 located in the body may be in a curved state due to the need to adapt to the shape of the human body's lumen channel. If the catheter 1 and the guidewire 2 are in a straight state, the "length" referred to in this article is the straight-line distance. If the catheter 1 and the guidewire 2 are in a curved arc state, the "length" referred to in this article refers to the arc length, and in this application, the guidewire 1 is inserted into the catheter 2, and the two can be regarded as having the same shape.

[0059] In another embodiment, the multiple scales are arranged at equal intervals, so that the value on the scale mark area S can be read quickly and the subsequent measurement can be performed quickly. Further, in order to facilitate the reading of the data of the scale mark area S outside the human body, the reference mark point 22 and the multiple scales are arranged on the side of the guide wire body 20 close to the proximal end, and the scale mark area S is located outside the patient's body. More specifically, during measurement, the scale mark area S is exposed outside the working channel of the medical tube mirror, which is convenient for naked eye observation.

[0060] See also Figure 4, the distance between the reference mark point 22 and the first measurement mark point 23 is equal to the axial length c corresponding to the minimum specification of the implant. According to the specifications of the implant (such as the lung volume reduction elastic coil) in the prior art and the anatomy and physiology of the lung, the size of c can be the minimum specification size of the lung implant, and c is data determined according to the type of implant (i.e., known data). For example, if the specifications of a group of lung volume reduction elastic coils are 90mm, 110mm, 130mm, and 150mm, the size of c can be set to 90mm. In one embodiment, the size range of c can be 90mm to 110mm. The measurement mark point closest to the reference mark point 22 among the multiple scales is the first measurement mark point 23. The distance between the first mark point 23 and the reference mark point 22 is the smallest, and the distance is equal to the minimum specification size of the implant. The minimum specification size can refer to the minimum axial length size of the lung volume reduction elastic coil when it is in a straight state.

[0061] Define the spacing between two adjacent scales in the multiple scales as d, where the size of d is also the length difference between implants of different specifications, and d is data determined according to the type of implant (i.e., known data). Make the distance between any scale in the multiple scales except the reference mark point 22 and the reference mark point 22 equal to the axial length of an implant device of one specification, so that the measuring device 100 can more quickly assist in selecting the specifications of the implant device. For example, the specifications of a group of lung implants are 90mm, 110mm, 130mm, and 150mm, and the value of d is 20mm. As a preferred embodiment, the size range of d can be 10mm to 20mm. As a specific embodiment, see Figure 3 and Figure 4 The scale can be set to five, that is, there are four equidistant measurement units between the five scales, and the length between each unit is 10mm to 20mm. The corresponding size reading can be marked next to each scale to facilitate reading the size. For example, the first measurement mark point 23 to the last measurement mark point 24 can be marked as 0, 1, 2, 3, and 4 in sequence.

[0062] As a specific embodiment, the dimensions of a, b, c, and f satisfy a≥bc and a≤b+f, so that the specifications of the implant can be quickly determined.

[0063] In one embodiment, the catheter display structure 11 is located at the distal end of the catheter 1 , and b=a.

[0064] As a specific embodiment, Figure 5 and Figure 6 As shown, the reference mark point 22 and each scale on the guide wire body 20 can be set by directly laser marking and engraving on the guide wire body 20, or as shown in FIG. Figure 6 and Figure 7As shown, by marking a reference mark point 22 at the distal end of the heat shrinkable tube W, marking a terminal mark point 24 at the proximal end of the heat shrinkable tube W, and marking corresponding intermediate scales in the middle, the heat shrinkable tube W is then sleeved on the guide wire body 20.

[0065] See also Figures 8 to 18 An embodiment of the present invention further provides a method for measuring diseased tissue in a lumen channel, providing a medical tube mirror 3, an X-ray development device (not shown) and the above-mentioned measuring device, which includes the following steps:

[0066] A. Figures 8 to 10 As shown, the bronchoscope 3 is deployed to the target lumen channel of the human tissue, and the distal end 32 of the medical bronchoscope 3 is aligned with the proximal end of the diseased tissue 4;

[0067] B. Insert the guide wire 2 into the hollow inner cavity of the catheter 1 in vitro and assemble them together. Deliver the assembled guide wire 2 of the measuring device through the working channel 31 of the medical tube mirror 3 and extend it into the airway of the bronchus 4 to be implanted. When the guide wire body 20 extends into the bronchus 4 and other human tissues in the human body, observe the guide wire development structure 201 at the distal end of the guide wire 2 through an X-ray development device. When the X-ray development device observes that the distal end of the guide wire development structure 201 has reached the most distal position of the diseased tissue 4, the delivery of the guide wire 2 can be stopped at this time.

[0068] C. See Figures 11 to 15 , keep the guide wire 2 in position, start pushing the catheter 1 to the distal end, and observe the position of the catheter development structure 11 through the X-ray development equipment, such as Fig.11 and Fig.12 As shown, when the catheter imaging structure 11 reaches the opening of the subsegmental bronchus and is flush with it (i.e., reaches the distal end 32 of the medical tube mirror 3, i.e., reaches the nearest end of the diseased tissue 4), the delivery of the catheter 1 is stopped. At this time, the proximal end of the catheter 1 corresponds to the scale mark area S located on the guide wire body 20. The length between the catheter imaging structure 11 and the guide wire imaging structure 201 is defined as x. This x value is the length of the target bronchial lesion tissue that needs to be measured, and is also the basis for selecting the size of the implant. Fig.12 and Fig.13 , define the end surface distance from the reference mark point 22 to the proximal end of the catheter 1 (i.e., the proximal end of the end cap 13) as e, estimate the value of e according to the scale mark area S corresponding to the proximal end of the catheter 1 (i.e., the end of the end cap 13), and then calculate the value of x. The value of x can be specifically calculated by the following formula:

[0069] x = e + ba;

[0070] The corresponding implant specifications are selected according to the calculated x value. Fig.15 It is used to illustrate the relative axial position relationship between the catheter 1 and the guide wire 2 in the patient's body. In order to facilitate the display of the scale mark area S, the catheter 2 is decomposed and moved in parallel along the radial direction. In addition, it should be noted that Fig.15 The interval corresponding to X is the length of the diseased tissue. In this embodiment, for the convenience of explanation, this part is illustrated in a straight line.

[0071] For example, assuming that the length specifications of the lung implant are 90mm, 110mm, 130mm, and 150mm, the corresponding size c in the present invention is 90mm and d is 20mm. When the size a=b, the length x of the target bronchus 4 is equal to the value of e, as shown in the formula: Fig.14 and Fig.15 As shown, the end cap 13 of the catheter 1 is between the mark 1 and the mark 2, and the dimension e is 110mm-130mm, that is, the length of the target bronchus 4 (i.e., x) is 110mm-130mm. To ensure that the implant will not be at the edge of the lung for a long time after implantation (prone to pneumothorax), an implant with a length of 110mm can be selected for implantation. According to this method, if the end cap 13 is located between the mark 0 and the mark 1, an implant with a length of 90mm is selected; if the end cap 13 is located between the mark 2 and the mark 3, an implant with a length of 130mm is selected; if the end cap 13 is located between the mark 3 and the mark 4, an implant with a length of 150mm is selected.

[0072] The measuring method provided by the present invention for measuring the length of diseased tissue using the above-mentioned measuring device can measure the length in a more convenient and intuitive manner through equivalent measurement of the length, because its scale mark area S is set at the proximal end, which is conducive to the rapid selection of implants of suitable specifications. Moreover, since it uses relatively few developing structures, it can avoid the problem of inaccurate measurement caused by mutual interference of too many developing structures when the guide wire is bent, and can also greatly reduce the risk of metal developing structures falling off in the organ, thereby improving the operability and safety of the operation.

[0073] The measuring device and the measuring method provided by the present invention also have the following beneficial effects: Figures 16 to 18After selecting an implant of appropriate specifications according to the x value, when the catheter 1 is subsequently pushed to the distal end as the implantation channel of the implant (the position of the guide wire 2 is kept unchanged at this time), it is possible to observe in vitro that the proximal end of the catheter 1 (i.e., the end cap 13) is flush with the reference mark 22 of the guide wire 2 without the aid of an X-ray developing device, and then stop delivering the catheter 1 (at this time, the catheter 1 reaches the farthest end of the diseased bronchus 4), withdraw the guide wire 2, and push the implant selected in step d through the hollow inner cavity of the catheter 1 to the distal end of the catheter 1, thus completing the implantation. That is, in the subsequent pushing stage of the catheter 1, the catheter 1 can be observed and pushed through in vitro observation without the aid of an X-ray developing device, which can effectively shorten the radiation time of the radiation workers and the examinees being irradiated by X-rays, thereby better protecting the health of the workers and the examinees.

[0074] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A measuring device for measuring the length of a diseased tissue to determine the specifications of an implant, characterized in that: The measuring device comprises: A catheter, wherein the catheter is a hollow tube structure, and a catheter developing structure is provided on the catheter, and the length between the catheter developing structure and the distal end of the catheter does not exceed the axial length corresponding to the minimum specification of the implant; A guidewire, the guidewire can be inserted into the catheter, a guidewire developing structure is provided on the distal end of the guidewire, a scale mark area is provided on the proximal side of the guidewire, the proximal end of the catheter can fall into the scale mark area, the scale mark area is located outside the patient's body during measurement, and is used to directly or indirectly measure the length between the catheter developing structure and the guidewire developing structure to determine the specifications of the implant; The measuring device measures the diseased tissue, and when the guidewire developing structure is aligned with the distal end of the diseased tissue, and the catheter developing structure is aligned with the proximal end of the diseased tissue, the proximal end of the catheter can fall into the scale mark area.

2. The measuring device according to claim 1, characterized in that: The length of the catheter is a, and the scale marking area is used to measure the length between the catheter developing structure and the guide wire developing structure. A plurality of scales are provided in the scale marking area, and the one located at the farthest end in the scale marking area among the plurality of scales is a reference marking point, and the scale farthest from the reference marking point among the plurality of scales is a final marking point, the length between the reference marking point and the guide wire developing structure is b, and the length between the reference marking point and the final marking point is f, and a≤b+f.

3. The measuring device according to claim 2, characterized in that: The catheter visualization structure is located at the distal end of the catheter, and b=a.

4. The measuring device according to claim 2, characterized in that: The minimum size of the implant corresponds to an axial length of c, a≥bc.

5. The measuring device according to claim 4, characterized in that: The length between the reference mark point and the nearest scale is equal to the axial length corresponding to the smallest size of the implant.

6. The measuring device according to claim 5, characterized in that: The length between any scale among the multiple scales except the reference mark point and the reference mark point is equal to the axial length of the implant of one specification.

7. The measuring device according to any one of claims 2 to 4, characterized in that: The multiple scales are arranged at equal intervals.

8. The measuring device according to any one of claims 1 to 6, characterized in that: The catheter developing structure is located at the distal end of the catheter.

9. The measuring device according to any one of claims 1 to 6, characterized in that: The length from the proximal end of the catheter to the catheter developing structure is a, and the size range of a is 900 mm to 950 mm.

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