Bronchus occluder recovery device

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a bronchus occluder recovery device which comprises a first handle and a second handle, the second handle is located at one end of the first handle, a supporting guide wire is fixed to one end of the first handle, a sheathing canal is fixed to one end of the second handle, and the sheathing canal is fixed to the other end of the second handle. The supporting guide wire is in sliding connection with the sheathing canal, the supporting guide wire is located in the sheathing canal, and a plurality of guide wire buckles are fixed to the end, away from the first handle, of the sheathing canal; wherein the sheath tube and the plurality of guide wire buckles form a barb structure. The supporting guide wire and the sheathing canal are placed in the bronchial occluder, the supporting guide wire is used for limiting the tail end of the occluder, the sheathing canal is withdrawn to enable the barb to hook the woven wire, the occluder is promoted to be subjected to in-situ deformation and is changed into the initial state from the working state, and finally the supporting guide wire, the sheathing canal and the occluder are taken out together. And secondary damage to new tissues caused by directly pulling the plugging device is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a bronchial occluder recovery device. Background Art

[0002] Currently, the number of patients undergoing lung surgery is increasing year by year. After lobectomy or segmentectomy, about 1% to 2% of patients will develop bronchopleural fistula, an abnormal channel formed between the bronchus and the pleura, which is one of the most serious complications after lung resection.

[0003] Clinically, occluders are often used to block fistulas. However, the occluders used clinically are occluders for congenital atrial septal defect, ventricular septal defect, and unclosed ductus arteriosus. Since these occluders are designed for congenital heart disease, they are not designed according to the shape, structure, or function of bronchial occluders, and are prone to the risk of incomplete occlusion and displacement. If bronchopleural fistulas are not treated promptly and effectively, they may infect the healthy lung of the patient after infection. And as the fistula heals, the occluder of the appropriate size needs to be replaced. Therefore, clinically, the occluder will be withdrawn and a new one will be replaced.

[0004] In the prior art, when withdrawing the occluder, the occluder is mostly pulled directly with forceps. During the pulling process, the newly formed tissue at the fistula is easily pulled, thereby causing secondary damage. In order to solve this clinical pain point, the present application document proposes a bronchial occluder recovery device to effectively reduce the damage to the fistula during the occluder recovery process. Summary of the invention

[0005] The purpose of the present invention is to provide a bronchial occluder recovery device, which places a supporting guide wire and a sheath into the bronchial occluder, uses the supporting guide wire to limit the end of the occluder, withdraws the sheath to allow the barbs to hook the braided wire, prompts the occluder to deform in situ, and changes from a working shape to an initial shape. Finally, the supporting guide wire, the sheath and the occluder are taken out together, avoiding secondary damage to the new tissue caused by directly pulling the occluder.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A bronchial occluder recovery device comprises a first handle and a second handle, wherein the second handle is located at one end of the first handle, a support guide wire is fixed to one end of the first handle, a sheath is fixed to one end of the second handle, the support guide wire and the sheath are slidably connected, and the support guide wire is located inside the sheath, and a plurality of guide wire buckles are fixed to one end of the sheath away from the first handle;

[0008] The sheath and the plurality of guide wire buckles form a barb structure, and the barb structure can drive the bronchial occluder to transform from a working form to an initial form.

[0009] In a preferred embodiment, a developing ring is provided at one end of the supporting guide wire away from the first handle.

[0010] In a preferred embodiment, a plurality of scale marks are provided on the outer end of the support guide wire close to the first handle.

[0011] In a preferred embodiment, the support guide wire is made of alloy guide wire.

[0012] In a preferred embodiment, the sheath tube is made of a composite tube with a metal layer.

[0013] A method for using a bronchial occluder recovery device, applicable to any one of the bronchial occluder recovery devices described above, characterized in that it comprises the following steps:

[0014] Step 1: Use forceps to break the biofilm at the front end of the bronchial occluder and expand the gap of the braided wire;

[0015] Step 2: insert the sheath into the bronchial occluder, and insert the support guide wire into the bronchial occluder through the sheath until the support guide wire forms a limit on the end of the occluder;

[0016] Step 3: Keep the support guide wire still, withdraw the sheath, hook the braided wire at the front end of the bronchial occluder through the barb structure, and continue to withdraw the sheath to deform the bronchial occluder in situ until the bronchial occluder changes from the working shape to the initial shape;

[0017] Step 4: Synchronously withdraw the support guidewire, sheath, and initial bronchial occluder

[0018] The technical effects achieved by the present invention are:

[0019] The present invention places the support guide wire and the sheath tube inside the bronchial occluder respectively, limits the end of the bronchial occluder by the support guide wire, withdraws the sheath tube, and makes the barb structure hook the braided wire, so that the occluder is deformed in situ, and changes from the working form to the initial form, and then the support guide wire, the sheath tube and the bronchial occluder in the initial form are taken out synchronously through the bronchoscope forceps channel. Compared with the technical means in the prior art that directly relies on the forceps to pull out the bronchial occluder, the present invention avoids pulling the newly formed tissue at the fistula, thereby avoiding secondary damage to the newly formed tissue;

[0020] The present invention respectively arranges a developing ring and a scale mark on the outside of the supporting guide wire. Under the guidance of the imaging device, the setting of the developing ring makes it easy for medical personnel to distinguish whether the end of the supporting guide wire away from the first handle is in contact with the end of the occluder to form a limit. The setting of the scale mark makes it easy for medical personnel to calculate the stretching length of the occluder when the occluder is deformed in situ, and further distinguish whether the occluder is transformed from a working shape to an initial shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0022] Figure 2 is a cross-sectional view of the overall structure in Embodiment 1 of the present invention;

[0023] Figure 3 It is an exploded schematic diagram of the overall structure in the first embodiment of the present invention;

[0024] Figure 4 The present invention Figure 3 A local enlarged schematic diagram of the middle A;

[0025] Figure 5 is a schematic diagram of the morphology of the bronchial occluder in the first embodiment of the present invention;

[0026] Figure 6 It is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0027] Figure 7 is an exploded schematic diagram of the overall structure in the second embodiment of the present invention;

[0028] Figure 8 is an enlarged schematic diagram of a local structure of the sheath tube in the second embodiment of the present invention;

[0029] Fig. 9 It is a schematic structural diagram of a thread guide in the second embodiment of the present invention;

[0030] Fig.10 is a radial structural cross-sectional view of the sheath tube and the guide wire buckle in the second embodiment of the present invention;

[0031] Fig.11 It is an axial structural cross-sectional view of the sheath tube and the guide wire buckle in the second embodiment of the present invention.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 10. First handle; 11. Support guide wire; 12. Development ring; 13. Scale mark; 20. Second handle; 21. Sheath; 22. Guide wire buckle; 23. Avoidance groove; 24. Card slot; 25. Locking section; 26. Limiting groove. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0037] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0038] Embodiment 1

[0039] Please refer to the attached Figures 1 to 4 As shown, it is the first embodiment of the present invention, which provides a bronchial occluder recovery device, including a first handle 10 and a second handle 20, the second handle 20 is located at one end of the first handle 10, a support guide wire 11 is fixed to the end of the first handle 10 close to the second handle 20, a sheath tube 21 is fixed to the end of the second handle 20 away from the first handle 10, the support guide wire 11 and the sheath tube 21 are slidably connected, and the support guide wire 11 is located inside the sheath tube 21, a plurality of guide wire buckles 22 are fixed to the end of the sheath tube 21 away from the first handle 10, and the plurality of guide wire buckles 22 are distributed in a circular array on the outer side of the sheath tube 21 away from the first handle 10;

[0040] The sheath tube 21 and the plurality of guide wire buckles 22 form a barb structure, and the barb structure can drive the bronchial occluder to transform from a working form to an initial form.

[0041] It should be noted that the working form of the bronchial occluder refers to the form of the bronchial occluder when it is placed inside the human body and has a blocking effect on the fistula. The initial form refers to the initial form of the bronchus. The occluder in the initial form is a thin strip and can move inside the bronchoscope channel.

[0042] Here, the bronchial occluder (i.e., the occluder) is a mesh hollow structure composed of multiple metal braided wires (such as nickel-titanium alloy) connected to each other, and its outer side is covered with a polymer biological film. In order to better describe the working process of the present device, when the occluder is recovered by a recovery device, the end of the occluder that preferentially contacts the recovery device is recorded as the front end, and the end of the occluder away from the front end is recorded as the end (i.e., the end of the occluder that last contacts the recovery device is recorded as the end). Of course, the front end and the end are only for distinguishing the two ends of the occluder, and do not constitute a specific limitation here.

[0043] In this embodiment, under the guidance of the bronchoscope field of view, the forceps are inserted through the bronchoscope forceps channel, and the biological film at the front end of the bronchial occluder is broken by the forceps and the gap of the braided wire is enlarged until the barb structure can smoothly enter the interior of the occluder, and the forceps are withdrawn. Under the guidance of the bronchoscope field of view, the second handle 20 is held, and the sheath 21 is inserted into the interior of the bronchial occluder through the bronchoscope forceps channel. Then the first handle 10 is held, and the support guide wire 11 is inserted into the interior of the bronchial occluder through the sheath 21 until the end of the support guide wire 11 away from the first handle 10 contacts the end inside the bronchial occluder (such as Figure 5 As shown in a), hold the second handle 20, withdraw the sheath 21, hook the braided wire at the front end of the bronchial occluder through the barb structure (that is, the guide wire buckle 22 is buckled on the braided wire), keep the support guide wire 11 stationary, continue to withdraw the sheath 21, and drive the front end of the occluder to move through the sheath 21. At this time, the support guide wire 11 forms a limit on the end inside the occluder, and the front end of the occluder is moved through the barb structure, so that the occluder is stretched in the axial direction and radially contracted and thinned, so that the occluder is transformed from the working shape to the initial shape (as shown in a). Figure 5 As shown in b), finally, the support guide wire 11, the sheath 21 and the initial form of the occluder are withdrawn synchronously. Through the above scheme, during the process of recovering the occluder, the occluder can be deformed in situ. Compared with the technical means in the prior art that directly relies on the forceps to pull out the bronchial occluder, it avoids pulling the newly formed tissue at the fistula, thereby avoiding secondary damage to the newly formed tissue.

[0044] Next, please refer to Figure 1 and Figure 3 As shown, a developing ring 12 is provided at one end of the supporting guide wire 11 away from the first handle 10 , and a plurality of scale marks 13 are provided at one end of the outer side of the supporting guide wire 11 close to the first handle 10 .

[0045] Here, the developing ring 12 is fixed to the outer side of the supporting wire 11 by crimping.

[0046] In this embodiment, when the support guide wire 11 is inserted into the occluder through the sheath 21, the setting of the developing ring 12 can quickly identify whether the end of the support guide wire 11 away from the first handle 10 is in contact with the end of the occluder through the imaging device, and position the end of the occluder. The setting of the scale mark 13 facilitates the quick identification of the stretching state of the occluder during the withdrawal process.

[0047] In a specific embodiment, see Figure 5 As shown, in this embodiment, three scale marks 13 are arranged on the outside of the support guide wire 11, and the three scale marks 13 are numbered A, B, and C in sequence from the end close to the first handle 10 to the end away from the first handle 10. When the occluder is recovered, the braided wire at the front end of the occluder is hooked by the barb structure, and the end of the support guide wire 11 away from the first handle 10 is made to fit with the end of the occluder (that is, the end of the support guide wire 11 away from the first handle 10 forms a limit on the end of the occluder). At this time, the end of the second handle 20 close to the first handle 10 corresponds to the scale mark 13 numbered C. After the sheath 21 is withdrawn, the end of the second handle 20 close to the first handle 10 corresponds to the scale mark 13 numbered A. The distance between two adjacent scale marks 13 can be used to calculate the stretched length of the occluder (denoted as L1), obtain the length of the working form of the occluder (denoted as L2), and then obtain the total length of the occluder after stretching (denoted as L3), wherein L3=L1+L2.

[0048] In a preferred embodiment, the material of the support guide wire 11 is preferably an alloy guide wire, the material of the sheath tube 21 is preferably a composite tube with a metal layer, the material of the composite tube is preferably: PTFE, PI or other biocompatible polymer materials, and the material of the guide wire buckle 22 is preferably nickel-titanium alloy.

[0049] In this embodiment, the biocompatible material usually does not cause immune rejection in the human body, thereby reducing the risk of infection.

[0050] A method for using a bronchial occluder recovery device, applicable to any of the above-mentioned bronchial occluder recovery devices, comprising the following steps:

[0051] Step 1: Insert forceps through the bronchoscope channel, use the forceps to break the biofilm at the front end of the occluder and expand the gap of the braided wire until the barb structure can smoothly enter the interior of the occluder;

[0052] Step 2: Hold the second handle 20, insert the sheath 21 into the bronchial occluder through the bronchoscope channel, hold the first handle 10, and insert the support guide wire 11 into the bronchial occluder through the sheath 21 until the support guide wire 11 limits the end of the occluder;

[0053] Step 3: Keep the support guide wire 11 stationary, withdraw the sheath 21, hook the braided wire at the front end of the bronchial occluder through the barb structure, and continue to withdraw the sheath 21, so that the bronchial occluder is deformed in situ until the bronchial occluder is transformed from the working shape to the initial shape;

[0054] Step 4: synchronously withdraw the support guide wire 11, the sheath tube 21 and the bronchial occluder in its initial form.

[0055] Embodiment 2

[0056] This embodiment is a further optimization based on the first embodiment, specifically:

[0057] See also Figures 6 to 11 A plurality of avoidance grooves 23 and a plurality of card slots 24 are provided at one end of the outer side of the sheath tube 21, and the plurality of avoidance grooves 23 and the plurality of card slots 24 correspond to each other one by one. A locking segment 25 is provided at one end of the wire guide buckle 22 away from the developing ring 12, and a limiting groove 26 is provided at the lower end of the outer side of the locking segment 25. The locking segment 25 and the avoidance groove 23 as well as the limiting groove 26 and the card slot 24 are adapted to each other, wherein when the locking segment 25 is subjected to force, the locking segment 25 can be elastically bent relative to the wire guide buckle 22.

[0058] Furthermore, in the present embodiment, the cross-sectional shape of the guide wire buckle 22 is similar to a U-shape, and a locking structure is formed by the cooperation of the sheath 21, the guide wire buckle 22, the card slot 24 and the limit slot 26. When the braided wire on the occluder is located inside the locking structure formed by the sheath 21 and the guide wire buckle 22, the locking structure limits the braided wire.

[0059] In this embodiment, when removing the bronchial occluder, under the guidance of the bronchoscope field of view, forceps are inserted through the bronchoscope forceps channel, and the biological film at the front end of the occluder is broken by the forceps and the gap of the braided wire is enlarged until the barb structure can smoothly enter the occluder. The forceps are withdrawn, and the second handle 20 is held, and the sheath 21 is inserted into the bronchial occluder through the bronchoscope forceps channel. Then, the first handle 10 is held, and the support guide wire 11 is inserted into the bronchial occluder through the sheath 21 until the support guide wire 11 is away from the first handle. The end of 10 is in contact with the end inside the bronchial occluder, and the end of the occluder is limited by the support guide wire 11. The second handle 20 is held and the sheath 21 is withdrawn. During the withdrawal process, when the braided wire on the occluder contacts the locking segment 25, the braided wire drives the locking segment 25 to elastically deform relative to the guide wire buckle 22 until the braided wire moves to the inside of the locking structure. The braided wire is limited by the locking structure, and the sheath 21 is continued to be withdrawn. The occluder and the new tissue will gradually separate, and the new tissue will exert a reverse pulling force on the occluder. When the braided wire inside the locking structure contacts the wire guide buckle 22, the reverse pulling force is transmitted to the wire guide buckle 22 through the braided wire, which may cause the wire guide buckle 22 to deform (here, the deformation of the wire guide buckle 22 under the reverse pulling force can be referred to as the scene of an umbrella turning over in windy weather). When the wire guide buckle 22 is deformed, the limiting groove 26 and the card slot 24 cooperate to limit the wire guide buckle 22 to prevent the wire guide buckle 22 from further deformation, thereby preventing the wire guide buckle 22 from being deformed. The braided wire at the end is separated from the guide wire buckle 22, making it impossible to remove the occluder. The sheath 21 is further withdrawn, so that the occluder and the new tissue are separated and transformed from the working form to the initial form. Finally, the supporting guide wire 11, the sheath 21 and the occluder in the initial form are simultaneously withdrawn. Through the above scheme, during the process of recovering the occluder, the occluder can be deformed in situ, and the braided wire inside it can be limited by the locking structure, so as to avoid the occluder and the hook structure from separating and the developing ring 12 from being deformed by force.

[0060] The working principle of the present invention is:

[0061] Insert the forceps through the bronchoscope forceps channel, use the forceps to break the biological film at the front end of the occluder and expand the gap of the braided wire until the hook structure can smoothly enter the interior of the occluder, hold the second handle 20, and insert the sheath 21 into the bronchial occluder through the bronchoscope forceps channel, hold the first handle 10, and insert the supporting guide wire 11 into the bronchial occluder through the sheath 21 until the supporting guide wire 11 limits the end of the occluder, keep the supporting guide wire 11 stationary, withdraw the sheath 21, hook the braided wire at the front end of the bronchial occluder with the barb structure, continue to withdraw the sheath 21, so that the bronchial occluder is deformed in situ, until the bronchial occluder is transformed from the working form to the initial form, finally, withdraw the supporting guide wire 11, the sheath 21 and the bronchial occluder in the initial form simultaneously, and take out the bronchial occluder.

[0062] The above are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the art unless otherwise specified and limited.

Claims

1. A bronchial occluder recovery device, characterized in that: The invention comprises a first handle (10) and a second handle (20), wherein the second handle (20) is located at one end of the first handle (10), a supporting guide wire (11) is fixed to one end of the first handle (10), a sheath tube (21) is fixed to one end of the second handle (20), the supporting guide wire (11) and the sheath tube (21) are slidably connected, and the supporting guide wire (11) is located inside the sheath tube (21), and a plurality of guide wire buckles (22) are fixed to one end of the sheath tube (21) away from the first handle (10); The sheath tube (21) and the plurality of guide wire buckles (22) form a barb structure, and the barb structure can drive the bronchial occluder to transform from a working form to an initial form.

2. The bronchial occluder recovery device according to claim 1, characterized in that: A developing ring (12) is provided at one end of the supporting guide wire (11) away from the first handle (10).

3. The bronchial occluder recovery device according to claim 1, characterized in that: A plurality of scale marks (13) are arranged on one end of the outer side of the support guide wire (11) close to the first handle (10).

4. The bronchial occluder recovery device according to claim 1, characterized in that: The support guide wire (11) is made of alloy guide wire.

5. The bronchial occluder recovery device according to claim 1, characterized in that: The sheath tube (21) is made of a composite tube with a metal layer.

6. A method for using a bronchial occluder recovery device, applicable to a bronchial occluder recovery device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Use forceps to break the biofilm at the front end of the bronchial occluder and expand the gap of the braided wire; Step 2: inserting the sheath tube (21) into the bronchial occluder, and inserting the support guide wire (11) into the bronchial occluder through the sheath tube (21), until the support guide wire (11) forms a limit on the end of the occluder; Step 3: Keep the support guide wire (11) stationary, withdraw the sheath (21), hook the braided wire at the front end of the bronchial occluder through the barb structure, and continue to withdraw the sheath (21), so that the bronchial occluder is deformed in situ until the bronchial occluder is transformed from the working shape to the initial shape; Step 4: synchronously withdraw the support guide wire (11), the sheath (21) and the bronchial occluder in its initial form.

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