A guide device for delivering an implant
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANSTAR MEDICAL TECHNOLOGY (SHENZHEN) CO LTD
- Filing Date
- 2025-04-26
- Publication Date
- 2026-07-14
Smart Images
Figure CN224484235U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a guide device for delivering implants. Background Technology
[0002] With declining air quality and an aging population, obstructive pulmonary disease has become the leading chronic respiratory disease in my country, with high morbidity and mortality rates. In particular, drug treatment is often ineffective in patients with severe emphysema phenotype. In this case, bronchoscopic lung volume reduction surgery has become an effective treatment method that can improve patients' lung function to a certain extent.
[0003] Bronchoscopic lung volume reduction surgery involves inserting an implant into the diseased area through a bronchoscope. The implant reduces the volume of gas flowing into the distal airway while allowing gas to flow out normally from the distal airway, thereby achieving a partial lung volume reduction effect. This volume reduction effect helps improve the patient's respiratory function and quality of life.
[0004] In existing intrabronchial implant delivery techniques with a central channel, biopsy forceps are typically used to clamp and deliver the implant to the target airway through the instrument channel of a bronchoscope. This process involves first using the endoscope for positioning to ensure the implant carried by the forceps accurately reaches the intended location, and then releasing the implant by adjusting the forceps' push knob, completing the implantation process. However, this traditional method has several limitations, mainly in the following aspects: First, because the biopsy forceps are located within the instrument channel of the endoscope, the endoscope's bending capability is limited; second, the forceps can easily cause physical damage to the implant during clamping; third, the forceps only clamp a portion of the implant, resulting in uneven force distribution and making the implant prone to deformation or damage.
[0005] Therefore, in order to overcome the above-mentioned shortcomings of biopsy forceps, a guide structure was invented, which pre-extends into the bronchus, and then the implant is implanted into the target position through the guide structure. However, the existing guide structure has poor stability and cannot smoothly extend into the curved part of the bronchus, affecting its effectiveness. Utility Model Content
[0006] In order to overcome the above-mentioned technical problems, this utility model provides a guiding device for delivering implants that can solve the above-mentioned technical problems.
[0007] Based on the above concept, the technical solution adopted by this utility model is as follows:
[0008] A guide device for delivering an implant includes a catheter and an expansion fixation member disposed at the distal end of the catheter, the distal end of the catheter communicating with the expansion fixation member to inject fluid into the interior of the expansion fixation member through the catheter, the expansion fixation member being inserted into a bronchus and fixed within the bronchus after expansion upon injection of fluid, the catheter being used to pass through the interior of an implant to allow the implant to be inserted along the catheter into a target location within the bronchus, wherein: the catheter includes a first portion at a distal end, a second portion at a proximal end, and a first bend connecting the first portion and the second portion; and / or, at least a portion of the expansion fixation member is bendable.
[0009] Preferably, in its natural state, the bending angle α of the first bending portion satisfies 5°≤a≤70°; and / or, the bending radius of the first bending portion is greater than 1mm; and / or, the distance h1 between the first bending portion and the distal end face of the conduit satisfies 3mm≤h1≤30mm; and / or, the outer surface of the inner side of the first bending portion is provided with a marking portion.
[0010] Preferably, the second part has a second curved portion.
[0011] Preferably, the second curved portion has multiple portions; and / or, the first curved portion is in the shape of a broken line or a curve; and / or, the second curved portion is in the shape of a broken line or a curve.
[0012] Preferably, in its natural state, the bending angle b of the second bend satisfies 5°≤b≤70°; and / or, the bending radius of the second bend is greater than 1mm; and / or, the distance h2 between the second bend and the distal end face of the conduit satisfies 10mm≤h2≤70mm.
[0013] Preferably, the maximum outer diameter of the catheter is less than 2 mm; and / or, the radial support force of the catheter is greater than 5 N.
[0014] Preferably, the minimum bending radius of the conduit is less than 80 mm; and / or, the coefficient of friction of the outer surface of the conduit is less than 0.1; and / or, the length of the conduit is greater than 0.6 m.
[0015] Preferably, the outer surface of the catheter is provided with graduations.
[0016] Preferably, the conduit and the expansion fastener are connected by adhesive bonding, wire binding, or ultrasonic welding.
[0017] Preferably, at least one end of the expansion fixing member is provided with a developing element.
[0018] This utility model has at least the following beneficial effects:
[0019] The guide device for delivering the implant of this utility model can securely fix the distal end of the catheter to the bronchus through an expansion fixation component, and then the proximal end of the catheter extends out of the body. Thus, after the catheter passes through the implant, the implant is quickly and accurately pushed into the bronchus along the catheter, improving the success rate of the operation, reducing the patient's pain, and reducing the difficulty of the operation. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the guide device and pusher for delivering the implant according to this utility model;
[0021] Figure 2 yes Figure 1 The diagram shown is a schematic diagram of the first embodiment of the guide device for delivering implants according to this utility model;
[0022] Figure 3 yes Figure 1 The diagram shown is a schematic diagram of a second embodiment of the guide device for delivering implants according to this utility model;
[0023] Figure 4 yes Figure 1 The diagram shown is a schematic diagram of the third embodiment of the guide device for transporting implants according to this utility model;
[0024] Figure 5 yes Figure 1 The diagram shown is a schematic diagram of the fourth embodiment of the guide device for delivering implants according to this utility model;
[0025] Figure 6 yes Figure 1 The diagram shown is a fifth embodiment of the guiding device for transporting implants according to this utility model;
[0026] Figure 7 yes Figure 1 The diagram shown is a schematic diagram of the sixth embodiment of the guide device for transporting implants according to this utility model;
[0027] Figure 8 yes Figure 1 The diagram shown is a schematic diagram of the seventh embodiment of the guide device for transporting implants according to this utility model;
[0028] Figure 9 yes Figure 1 The diagram shown is an eighth embodiment of the guiding device for transporting implants according to this utility model;
[0029] Figure 10 yes Figure 1 A schematic diagram of the pushing section of the pusher shown;
[0030] Figure 11 yes Figure 1 A schematic diagram of the contact portion of the pusher shown;
[0031] Figure 12 yes Figure 11 The cross-sectional view of the abutment portion is shown below;
[0032] Figure 13 yes Figure 1 A schematic diagram of the pusher shown;
[0033] Figure 14 yes Figure 1 A schematic diagram of another embodiment of the pusher shown;
[0034] Figure 15 This is a schematic diagram of another embodiment of the guide device and pusher for delivering the implant according to this utility model;
[0035] Figure 16 This is a schematic diagram of another embodiment of the guide device and pusher for delivering the implant of this utility model;
[0036] Figure 17 This is a schematic diagram of the guide device for delivering the implant of this utility model when used in the bronchus.
[0037] Explanation of icon numbers:
[0038] 1-Guiding device for delivering the implant; 11-Catheter; 111-First bend; 112-Second bend; 12-Expansion fixation element; 13-Illuminating element; 2-Pushing element; 21-Pushing part; 211-Main body; 2111-Through hole; 2112-Notch; 212-Connecting part; 22-Abutting part; 221-Main body; 222-Distal end; 223-Proximal end; 224-Through hole; 24-Handle part; 3-Bronchi; 4-Implant. Detailed Implementation
[0039] The guiding device for delivering implants provided by the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some embodiments of the present invention, not all embodiments, and the present invention can be implemented in many other ways different from those described herein.
[0040] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.
[0041] It should be noted that all directional indications in the embodiments of this specification are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0042] In one embodiment, a guide device 1 for delivering an implant includes a catheter 11 and an expansion fixation member 12 disposed at the distal end of the catheter 11. The distal end of the catheter 11 communicates with the expansion fixation member 12 to inject fluid into the expansion fixation member 12 through the catheter 11. Figures 1 to 17 As shown.
[0043] Preferably, the conduit 11 is a hollow tubular structure with an internal cavity connecting both ends, so that fluid can be injected into the inside of the conduit 11 from the proximal end.
[0044] It should be noted that the above-mentioned injection fluid can be gas or liquid, etc., which can be set as needed, and no specific limitation is made here.
[0045] More preferably, the catheter 11 is elongated, with the distal end of the catheter 11 inserted into the bronchus and the proximal end of the catheter 11 outside the body, so that fluids can be injected outside the body through the proximal end of the catheter 11.
[0046] It should be noted that the "proximal end" mentioned above refers to the end closer to the operator, and the "distal end" refers to the end farther away from the operator.
[0047] More preferably, the cross-section of the conduit 11 can be circular, rectangular, or other geometric shapes, etc., without specific limitations.
[0048] Preferably, the expansion fixation member 12 is disposed at the distal end of the catheter 11 so as to extend into the patient's bronchus along with the distal end of the catheter 11 and to be fixed in the bronchus.
[0049] More preferably, the expansion fastener 12 is connected to the distal end of the conduit 11, that is, the interior of the conduit 11 is connected to the interior of the expansion fastener 12, so that fluid is injected into the interior of the expansion fastener 12 through the conduit 11.
[0050] Furthermore, the expansion fastener 12 can expand when fluid is injected, increasing its volume so that the outer surface of the expansion fastener 12 abuts against the inner wall of the bronchus, thereby achieving the purpose of fixing the expansion fastener 12 inside the bronchus; and when the fluid inside the expansion fastener 12 is withdrawn, it will contract and return to its circular shape, so that it can be removed from the bronchus.
[0051] Furthermore, the expansion fixing element 12 is preferably a balloon or the like.
[0052] Furthermore, the expansion fixation component 12 can be a conventional balloon or an irregularly shaped balloon. For example, the expansion fixation component 12 may have multiple protrusions 121, such as... Figure 3 As shown, the irregularly shaped balloon significantly increases the anchoring force of the inflatable fixation element 12 in the bronchus, making its stabilizing effect more ideal.
[0053] It should be noted that there may be one expansion fastener 12 or multiple expansion fasteners, which can be set as needed and are not specifically limited here.
[0054] It should also be noted that when the expansion fastener 12 expands, it can expand completely or only partially, and no specific limitation is made here.
[0055] In one embodiment, the expansion fixation member 12 is used to extend into the bronchus 3 and be fixed within the bronchus 3 after expansion following fluid injection, and the catheter 11 is used to pass through the interior of the implant 4 so that the implant is inserted along the catheter 11 to a target location within the bronchus, such as... Figures 1 to 17 As shown.
[0056] Preferably, the target location is the location within the bronchus where the implant needs to be placed, such as the location of a lesion within the bronchus, which can be selected and set as needed.
[0057] More preferably, the expansion fixation member 12 extends into the bronchus 3 along with the distal end of the catheter 11 and is used to fix it in the bronchus 3 so as to fix the distal end of the catheter 11 in the bronchus 3.
[0058] More preferably, after the expansion fixation member 12 is inserted into the bronchus 3, fluid is injected into the proximal end of the catheter 11 to transfer the fluid to the expansion fixation member 12, causing the expansion fixation member 1 to expand until the outer surface of the expansion fixation member 1 abuts against the inner wall of the bronchus 3, thereby achieving the purpose of fixing the expansion fixation member 1 into the bronchus 3.
[0059] Preferably, the catheter 11 passes through the interior of the implant 4, allowing the implant 4 to slide on the conductor 11, thereby allowing the implant 4 to slide from the proximal end to the distal end on the catheter 11 until it slides into the bronchus 3, thus achieving the purpose of implantation. The operation is simple and convenient to use.
[0060] It should be noted that, due to the aforementioned limitations, after the distal end of the catheter 11 is pre-fixed in the bronchus 3 by the expansion fixation member 12, the implant can be accurately and quickly inserted into the target position in the bronchus 3 along the catheter 11. This not only reduces the difficulty of operation but also improves the success rate and efficiency of the surgery, effectively alleviating patient pain and reducing the harm caused to the patient.
[0061] More preferably, the catheter 11 can pass through the entire implant 4 or through a part of the implant 4, and can be selected as needed, without specific limitation here.
[0062] Furthermore, after the catheter 11 passes through the implant 4 and fits with it in a gap, that is, there is a gap between the outer surface of the catheter 11 and the inner surface of the implant 4, so that the implant 4 can slide smoothly on the catheter 11 and be implanted into the target position.
[0063] In one embodiment, the catheter 11 includes a first portion 114 at a distal end, a second portion 113 at a proximal end, and a first bend 111 connecting the first portion 114 and the second portion 113, such as... Figure 4 and Figure 5 As shown.
[0064] Preferably, the first part 114 is the distal end of the catheter 11, which is used to extend into the bronchus 3.
[0065] More preferably, the second part 113 is the proximal end of the catheter 11, which may be entirely outside the body after the expansion fixation member 12 is fixed inside the bronchus 3, or it may be partially outside the body and partially inside the body, etc., without specific limitation here.
[0066] More preferably, the lengths of the first part 114 and the second part 113 can be set as needed, and no specific limitation is made here.
[0067] Preferably, the first curved portion 111 is disposed between the first portion 114 and the second portion 113, with the distal end of the first curved portion 111 connected to the first portion 114 and the proximal end of the first curved portion 111 connected to the second portion 113, thereby making the catheter 11 curved to meet the requirement of introducing the implant into the curved bronchus.
[0068] More preferably, the first bent portion 111 is fixedly connected to the first part 114, such as by bonding, welding, or integral molding, etc., without specific limitations. Furthermore, the first bent portion 111 is fixedly connected to the second part 113, such as by bonding, welding, or integral molding, etc., without specific limitations.
[0069] Furthermore, when multiple first curved portions 111 are provided, the multiple first curved portions 111 may be in the same plane or may not be in the same plane. Furthermore, the bending directions of the multiple first curved portions 111 may be in the same direction or in different directions, etc., which can be set as needed, and no specific limitation is made here.
[0070] Furthermore, the bending angle of the first curved part 111 can be an acute angle or an obtuse angle, etc., which the user can set as needed, and no specific limitation is made here.
[0071] Furthermore, the outer diameters of the first part 114, the second part 113, and the first curved part 111 can be the same or different. Users can set them according to their needs, and no specific limitation is made here.
[0072] In one embodiment, at least a portion of the expansion fastener 12 is curved, such as... Figure 5 As shown.
[0073] Preferably, when the expansion fastener 12 is curved, it can be curved at the distal end, the proximal end, or the middle part, etc. The user can set it according to needs, and no specific limitation is made here.
[0074] More preferably, when the expansion fastener 12 is curved, the length of the curved part can be one-tenth, one-ninth, one-eighth, one-seventh, one-sixth, one-fifth, one-quarter, one-third, one-half, etc. of the expansion fastener 12. Users can set it according to their needs, and no specific limitation is made here.
[0075] More preferably, the expansion fastener 12 can also be entirely curved, such as... Figure 5 As shown, this design meets the needs of bronchi with large curvatures, significantly expanding its application range.
[0076] In one embodiment, under natural conditions, the bending angle α of the first curved portion 111 satisfies 5° ≤ α ≤ 70°, such as... Figure 4 As shown.
[0077] Preferably, the bending angle of the first bending portion 111 is the included angle α between its two ends extending in the same direction. The included angle α can be 5°, 6°, 7°, 8°, 9°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, etc. The specific value can be set as needed and is not specifically limited here.
[0078] It should be noted that the above-mentioned limitation on the range of included angle α enables the implantation of bronchus 3 at different angles, thus significantly expanding the scope of application of this utility model.
[0079] More preferably, the bending angle α of the first bending portion 111 is preferably 10° to 60°, so as to meet the needs of most intrabronchial implantation of the implant 4.
[0080] It should be noted that when the included angle α is less than 5°, this invention cannot meet the implant delivery requirements; when the included angle α is greater than 70°, the outer diameter of the catheter in the curved part will be significantly increased, which will affect the implant delivery result, increase patient pain and reduce the success rate of surgery.
[0081] In one embodiment, the bending radius of the first bent portion 111 is greater than 1 mm, such as... Figure 4 As shown.
[0082] Preferably, the bending radius of the first bending portion 111 is greater than 1mm, such as 1.1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc. The user can set it according to needs, and no specific limitation is made here.
[0083] It should be noted that when the bending radius of the first bending portion 111 is less than or equal to 1 mm, the outer diameter of the catheter 11 will increase, which will affect the effect of implantation into the bronchus 3. Therefore, by limiting the bending radius range of the first bending portion 111 as described above, the outer diameter of the first bending portion 111 is significantly reduced, so that the distal end of the catheter 11 can be successfully implanted into the bronchus 3.
[0084] More preferably, the bending radius of the first bending portion 111 is greater than 2mm, thereby meeting the needs of implanting the implant 4 into the vast majority of bronchi 3, with a wide range of applications and significant effects.
[0085] In one embodiment, the distance h1 between the first curved portion 111 and the distal end face of the conduit 11 satisfies 3mm ≤ h1 ≤ 30mm, such as... Figure 4 As shown.
[0086] Preferably, the distance h1 between the first bend 111 and the distal surface of the catheter 11 is the same as the distance between the distal surface of the first bend 111 and the distal surface of the catheter 11, such as... Figure 4 As shown.
[0087] More preferably, the distance h1 can be 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 15mm, 20mm, 25mm, 30mm, etc., and its specific value can be set as needed, without being specifically limited here.
[0088] It should be noted that the above-mentioned limitation on h1 enables the present invention to be implanted in a deeper position, thereby expanding the implantation range and making the anchoring effect more secure, which is more conducive to the implantation of the implant 4 along the catheter 11.
[0089] More preferably, the distance h1 is preferably 5mm to 30mm, thereby meeting most of the requirements for deep implantation and significantly enhancing the anchoring force, so that the distal end of the catheter 11 can be firmly fixed in the bronchus 3.
[0090] In one embodiment, the outer surface of the inner side of the first curved portion 111 is provided with a marking portion, such as... Figure 4 As shown.
[0091] Preferably, the marking part is disposed on the outer surface of the inner side of the first curved part 111. It can be a marking that can be identified under the endoscopic field of view, such as lines, patterns, colors, etc., or it can be a marking that can be identified by the detection equipment, such as a rough surface with a roughness of 10um to 40um that can be detected by ultrasound, or a radiopaque marking that can be detected by X-rays, etc. It can be selected and set as needed, and no specific limitation is made here.
[0092] More preferably, when the marking part is a rough surface, the roughness of the outer surface of the inner side of the first curved part 111 is greater than that of other areas, so that its accurate position and direction can be obtained by ultrasound, which is beneficial to understanding the depth of the first curved part 111 implantation and its bending direction, thus facilitating the user's operation.
[0093] More preferably, the roughness of the rough surface can be 10um, 11um, 12um, 13um, 14um, 15um, 16um, 17um, 18um, 19um, 20um, 25um, 30um, 35um, 40um, etc., and the specific value can be set as needed, without being specifically limited here.
[0094] It should be noted that the aforementioned limitation on the roughness of the outer surface of the inner side of the first curved portion 111 not only facilitates the acquisition of its position and bending direction by ultrasound, but also facilitates production and processing, and improves the convenience of operation.
[0095] In one embodiment, the second portion 113 is provided with a second curved portion 112, such as... Figure 9 As shown.
[0096] Preferably, one or more second bends 112 may be provided. Multiple second bends 112 are arranged sequentially at intervals along the axial direction of the conduit 11, and their specific number can be set as needed, without being specifically limited here.
[0097] It should be noted that after the catheter 11 is inserted into the bronchus 3, the second bend 112 corresponds to the bend that the catheter 11 experiences when it is inserted into the bronchus 3, so that it can not only pass through the bend smoothly, but also enhance the anchoring effect, making it more stable during use.
[0098] More preferably, the length of the second curved portion 112 can be selected and set as needed, and is not specifically limited here.
[0099] More preferably, when there are multiple second curved portions 112, the multiple second curved portions 112 may be in one plane or may not be in one plane; furthermore, the bending directions of the multiple second curved portions 112 may be the same or opposite, etc., without specific limitation here.
[0100] It should be noted that the first curved portion 111 and the second curved portion 112 may or may not be in the same plane; furthermore, the bending directions of the first curved portion 111 and the second curved portion 112 may be the same or opposite, etc., without specific limitations here.
[0101] In one embodiment, the second curved portion 112 is provided with multiple portions, such as... Figure 9 As shown.
[0102] Preferably, the second bend 112 is provided in multiple ways to accommodate the need for multiple bends within the bronchus 3, which not only allows the distal end of the catheter 11 to be smoothly implanted into the bronchus 3, but also enhances the anchoring force and provides more ideal stability during use.
[0103] More preferably, the plurality of second curved portions 112 can be arranged at equal intervals or at non-equal intervals, and can be selected and set as needed, without being specifically limited here.
[0104] More preferably, the bending angles of the plurality of second curved portions 112 may be the same or different, and no specific limitation is made here.
[0105] Preferably, the bending radii of the plurality of second curved portions 112 may be the same or different, and no specific limitation is made here.
[0106] In one embodiment, the first curved portion 111 is in the shape of a broken line or a curve, such as... Figure 4 As shown.
[0107] Preferably, the first bend 111 is in the shape of a broken line, which facilitates processing and manufacturing while meeting the requirements for implantation and anchoring of the bent bronchus 3, thus simplifying the structure.
[0108] More preferably, the first bend 111 is curved, so that the catheter 11 can pass through the curved bronchus 3 better, reducing damage to the bronchus 3 and making it safer.
[0109] More preferably, the first curved portion 111 can also be a combination of curves and broken lines, which can be set as needed and is not specifically limited here.
[0110] In one embodiment, the second curved portion 112 is in the shape of a broken line or a curve, such as... Figure 9 As shown.
[0111] Preferably, the second curved portion 112 is in the shape of a broken line, which facilitates processing and manufacturing while meeting the requirements for the implantation and anchoring of the curved bronchus 3, thus simplifying the structure.
[0112] More preferably, the second bend 112 is curved, so that the catheter 11 can pass through the curved bronchus 3 better, reducing damage to the bronchus 3 and making it safer.
[0113] More preferably, the second curved portion 112 can also be a combination of curves and broken lines, which can be set as needed and is not specifically limited here.
[0114] In one embodiment, under natural conditions, the bending angle b of the second curved portion 112 satisfies 5° ≤ b ≤ 70°, such as... Figure 9 As shown.
[0115] It should be noted that the above natural state refers to the state when the second curved part 112 is not under stress.
[0116] Preferably, the bending angle of the second curved portion 112 is the included angle b between the extending directions of its two ends. The included angle b can be 5°, 6°, 7°, 8°, 9°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, etc. The specific value can be set as needed and is not specifically limited here.
[0117] It should be noted that the above-mentioned limitation on the range of included angle b enables the implantation of bronchus 3 at different angles, thus significantly expanding the scope of application of this utility model.
[0118] More preferably, the bending angle α of the second bending portion 112 is preferably 10° to 60°, so as to meet the needs of most intrabronchial implantation of the implant 4.
[0119] It should be noted that when the included angle b is less than 5°, this invention cannot meet the implant delivery requirements; when the included angle b is greater than 70°, the outer diameter of the catheter in the curved section will be significantly increased, thus affecting the implant delivery result, increasing patient discomfort and reducing the success rate of the surgery.
[0120] In one embodiment, the bending radius of the second bent portion 112 is greater than 1 mm, such as... Figure 9 As shown.
[0121] Preferably, the bending radius of the second bending portion 112 is greater than 1 mm, such as 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc. The user can set it according to needs, and no specific limitation is made here.
[0122] It should be noted that when the bending radius of the second bending portion 112 is less than or equal to 1 mm, the outer diameter of the catheter 11 will increase, which will affect the effect of implantation into the bronchus 3. Therefore, by limiting the bending radius range of the second bending portion 112 as described above, the outer diameter of the second bending portion 112 is significantly reduced, so that the distal end of the catheter 11 can be successfully implanted into the bronchus 3.
[0123] More preferably, the bending radius of the second bending portion 112 is greater than 2 mm, thereby meeting the needs of implanting the implant 4 into the vast majority of bronchi 3, with a wide range of applications and significant effects.
[0124] In one embodiment, the distance h2 between the second curved portion 112 and the distal end face of the conduit 11 satisfies 10mm ≤ h2 ≤ 70mm, such as... Figure 9 As shown.
[0125] Preferably, the distance h2 between the second bend 112 and the distal surface of the catheter 11 is the distance between the distal surface of the second bend 112 and the distal surface of the catheter 11, such as... Figure 9 As shown.
[0126] More preferably, the distance h2 can be 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, etc., and its specific value can be set as needed, without being specifically limited here.
[0127] It should be noted that the above-mentioned limitation on h2 enables the present invention to be implanted in a deeper position, thereby expanding the implantation range and making the anchoring effect more secure, which is more conducive to the implantation of the implant 4 along the catheter 11.
[0128] More preferably, the distance h2 is 20mm to 60mm, thereby meeting the needs of most deep implantation and significantly enhancing the anchoring force, so that the distal end of the catheter 11 can be firmly fixed in the bronchus 3.
[0129] In one embodiment, the maximum outer diameter of the catheter 11 is less than 2 mm.
[0130] Preferably, the maximum outer diameter of the catheter 11 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, etc., and the specific value can be set as needed, without being specifically limited here.
[0131] It should be noted that it is precisely the limitation on the maximum outer diameter of the catheter 11 mentioned above that allows the implant 4 to be smoothly pushed on the catheter 11, thereby enabling the implant 4 to slide stably on the catheter 11 and move the implant 4 to the target position.
[0132] More preferably, the maximum outer diameter of the catheter 11 is less than 1.5 mm, so that the catheter 11 can easily pass through the channel of the curved endoscopic instrument and can be smoothly withdrawn from the central channel of the implant 4 without causing unnecessary interference or displacement to the implanted implant 4.
[0133] In one embodiment, the radial support force of the conduit 11 is greater than 5N.
[0134] Preferably, the radial support force of the conduit 11 can be 5.1N, 5.2N, 5.3N, 5.4N, 5.5N, 5.6N, 5.7N, 5.8N, 5.9N, 6N, 7N, 8N, 9N, 10N, etc., and the specific value can be set as needed, without being specifically limited here.
[0135] It should be noted that it is precisely the limitation of the radial support force of the catheter 11 mentioned above that ensures that the expansion fixation member 12 will not shift during the process of pushing the implant 4, so that the implant 4 can be successfully implanted into the target position.
[0136] It should also be noted that the radial support force of the catheter 11 is preferably greater than 7N, which provides a more significant support effect on the expansion fixation element 12 and is more conducive to the implant 4 being successfully implanted into the target position.
[0137] In one embodiment, the minimum bending radius of the conduit 11 is less than 80 mm.
[0138] Preferably, the minimum bending radius of the conduit 11 is less than 80mm, such as 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, etc. The specific value can be set as needed and is not specifically limited here.
[0139] It should be noted that the aforementioned limitation on the minimum bending radius of the catheter 11 enables this invention to adapt to the bending structure of the bronchus 3 without affecting the bending performance of the endoscope.
[0140] More preferably, the minimum bending radius of the catheter 11 is less than 50 mm, so as to better adapt to the bending structure of the bronchus 3 and reduce the impact on the bending performance of the endoscope.
[0141] In one embodiment, the coefficient of friction of the outer surface of the conduit 11 is less than 0.1.
[0142] Preferably, the coefficient of friction of the outer surface of the conduit 11 can be 0.09, 0.008, 0.007, 0.006, 0.005, 0.004, 0.003, 0.002, 0.001, etc., and its specific value can be set as needed, without being specifically limited here.
[0143] It should be noted that the aforementioned limitation on the friction coefficient of the outer surface of the catheter 11 makes the outer surface smoother, reduces damage to the inner wall of the bronchus 3, and makes it easier to implant into the bronchus 3.
[0144] More preferably, the coefficient of friction of different regions on the outer surface of the conduit 11 may be the same or different, and the specific value can be set as needed, without being specifically limited here.
[0145] Preferably, the friction coefficient of the distal outer surface of the catheter 11 is less than that of the proximal outer surface, making the distal outer surface of the catheter 11 smoother. This not only reduces damage to the inner wall of the bronchus 3 when the distal end of the catheter 11 is implanted into the bronchus 3, but also makes it easier to guide into the bronchus 3, reducing the difficulty of operation and improving the implantation efficiency.
[0146] Preferably, the coefficient of friction of the outer surface of the proximal end of the conduit 11 can be set to a relatively large value, such as close to 0.1, so as to facilitate the user's grip, increase the friction between the conduit and the hand, and prevent it from falling from the hand during use.
[0147] In one embodiment, the length of the catheter 11 is greater than 0.6m, such as... Figures 1 to 17 As shown.
[0148] Preferably, the length of the catheter 11 is the distance between its proximal end face and its distal end face. The length of the catheter 11 can be 0.61m, 0.62m, 0.63m, 0.64m, 0.65m, 0.66m, 0.67m, 0.68m, 0.69m, 0.7m, 0.8m, 0.9m, 1m, 2m, etc. The specific value can be set as needed and is not specifically limited here.
[0149] It should be noted that the aforementioned limitation on the length of catheter 11 allows it to be suitable for the lung implantation needs of most people, and leaves room for operation outside the body so that it can be removed from the endoscope.
[0150] More preferably, the length of the catheter 11 is greater than 0.8m, so as to meet the implantation needs of most people, expand its applicability, and reduce the cost of use.
[0151] In one embodiment, the outer surface of the catheter 11 is provided with graduations, such as... Figure 8 As shown.
[0152] Preferably, the outer surface of the catheter 11 is provided with graduations, so that the position of the distal end of the catheter 11 and how far it is from the target position in the bronchus 3 can be determined by the endoscope, thereby facilitating daily use and improving ease of use.
[0153] More preferably, the scale extends along the axis of the catheter 11 from its proximal end toward its distal end, thereby making it easy to visually determine the position of the distal end of the catheter 11 from the external portion of the catheter 11, which is simple to operate and convenient to use.
[0154] More preferably, the scale can be in millimeter, centimeter, decimeter, etc., which can be set as needed, and no specific limitation is made here.
[0155] Preferably, the starting point of the scale can be from the expansion fixing member 12 or from the distal end face of the conduit 11, etc., without specific limitation here.
[0156] In one embodiment, the conduit 11 and the expansion fixation member 12 are fixedly connected by adhesive bonding, wire binding, or ultrasonic welding, such as... Figure 7 As shown.
[0157] Preferably, the conduit 11 is fixedly connected to the expansion fixing member 12, thereby achieving stability between the two and enabling effective communication between their interiors.
[0158] More preferably, the connection between the conduit 11 and the expansion fastener 12 can be achieved by adhesive bonding, wire binding, ultrasonic welding, steel sleeve fixing, etc., and no specific limitation is made here.
[0159] It should be noted that: such as Figure 7 As shown, when the conduit 11 and the expansion fastener 12 are connected by binding and fixing through the line 14, the binding and fixing of the expansion fastener 12 with the conduit 11 can be achieved through the lines on both sides of the expansion fastener 12, making it more secure.
[0160] In one embodiment, at least one end of the expansion fixing member 12 is provided with a developing member 13, such as... Figure 6 As shown.
[0161] Preferably, the developing element 13 is disposed at one end of the expansion fixing element 12, or it can be disposed at both ends of the expansion fixing element 12, etc., which can be disposed as needed, and no specific limitation is made here.
[0162] More preferably, the developing element 13 can be in the shape of a ring or an arc, etc., and the user can set it according to his or her needs. No specific limitation is made here.
[0163] More preferably, the developing element 13 can be made of conventional developing materials, etc., and the user can set it according to needs, without making specific limitations here.
[0164] It should be noted that the position of the expansion fixing member 12 can be determined by the image through the setting of the developing member 13, and at the same time, the expansion fixing member 12 is reinforced.
[0165] In one embodiment, the distal end of the catheter 11 has a lower hardness than its proximal end.
[0166] Preferably, the hardness of the distal end of the catheter 11 is less than that of its proximal end, that is, the distal end of the catheter 11 is more flexible, so that the distal end of the catheter 11 will not damage the inner wall of the bronchus 3 when it is implanted into the bronchus 3, reducing the patient's pain and making it easier to implant into the curved bronchus 3.
[0167] In one embodiment, after the catheter 11 passes through the interior of the implant 4, the catheter 11 is provided with a pusher 2 to push the implant 4 on the catheter 11 to the target position in the bronchus 3.
[0168] It should be noted that after the expansion fixation member 12 is implanted and fixed in the bronchus 3 and the catheter 11 passes through the inside of the implant 4, the implant 4 often cannot slide smoothly down the catheter 11 to the target position in the bronchus 3 and is subject to resistance in the bronchus 3. Therefore, it is necessary to use the pusher 2 to push the implant 4 on the catheter 11 to the target position.
[0169] Preferably, the catheter 11 passes through at least a portion of the pusher 2 so that the pusher 2 can slide on the catheter 11, and the implant 4 is located at the distal end of the pusher 2 so that the implant 4 can be smoothly implanted into the target location in the bronchus 3 by pushing the pusher 2 along the catheter 11.
[0170] In one embodiment, the pusher 2 includes a pushing portion 21 and an abutting portion 22 fixed to the distal end of the pushing portion 21. A conduit 11 passes through the interior of the pushing portion 21 and the abutting portion 22 so that the pusher 2 can slide on the conduit 2. Figure 1 , Figure 15 and Figure 16 As shown.
[0171] Preferably, the pushing part 21 is a hollow tubular structure, but it can also be other structures, as long as the inside is hollow, so that the conduit 11 can pass through.
[0172] More preferably, the abutting part 22 is provided with a through hole 224 extending along the axial direction. The through hole 224 penetrates both ends of the abutting part 22 along the axial direction. The distal end of the pushing part 21 extends into the through hole 224 and is fixedly connected to it, such as by interference fit, so as to realize the fixed connection between the pushing part 21 and the abutting part 22 and prevent them from separating during use.
[0173] More preferably, when the conduit 11 passes through the pusher 2, the proximal end of the conduit 11 passes through the through hole 224 and the interior of the pusher 21 in sequence, and extends out from the proximal end of the pusher 21 or other areas.
[0174] Preferably, the pushing part 21 includes a main body part 211 and a connecting part 212, such as Figure 10 , Figure 13 and Figure 14 As shown, the main body 211 is a hollow elongated strip with an internal cavity. The connecting part 212 is fixed to the distal end of the main body 211, such as by bonding, welding, or integral molding, to achieve a fixed connection between the two. The outer diameter of the connecting part 212 is larger than the outer diameter of the main body 211 and larger than the outer diameter of the through hole 224, so that when the connecting part 212 extends into the through hole 224, it can have an interference fit with the abutment part 22 to achieve a stable connection. In other embodiments, an adhesive can also be added between the connecting part 212 and the inner wall of the through hole 224 to enhance the stability of the connection.
[0175] More preferably, the shape of the connecting part 212 can be conical, hemispherical, etc., and its specific shape can be set as needed, without being specifically limited here.
[0176] Furthermore, the contact portion 22 includes a main body portion 221, a distal end portion 222 disposed at the far end of the main body portion 221, and a proximal end portion 223 disposed at the near end of the main body portion 221. The main body portion 221, the distal end portion 222, and the proximal end portion 223 are fixedly connected, such as by bonding, welding, or integral molding, thereby enhancing the stability of the connection between the three.
[0177] It should be noted that the distal end 222 can be conical, hemispherical, or similar in shape, which not only allows the implant 4 to be pushed to the target position but also reduces damage to the inner wall of the bronchus 3 during the pushing process, ensuring safety and effectiveness. The proximal end 223 can also be conical or hemispherical, which not only reduces damage to the inner wall of the bronchus 3 when removing the pusher 2 but also reduces material usage to achieve cost reduction.
[0178] It should also be noted that the through hole 224 extends axially through the distal end 222, the body 221 and the proximal end 223, thereby facilitating the passage of the conduit 11.
[0179] Furthermore, when the conduit 11 passes through the pusher 2, it can pass entirely through the pusher 2, such as... Figure 1 and Figure 16 As shown, it can also partially pass through pusher 2, such as Figure 15 As shown, the following are detailed explanations:
[0180] When the conduit 11 has completely passed through the pusher 2: the conduit 11 penetrates the proximal and distal surfaces of the pusher 21 and passes through the through hole 224, thereby allowing the pusher 2 to slide more stably on the conduit 11, such as Figure 1 As shown; in other embodiments, a notch 2112 may also be provided on the pushing part 21, which not only facilitates the passage of the catheter 11, but also improves the efficiency of the pushing part 21 sliding on the catheter 11, so as to quickly push the implant 4 to the target position.
[0181] When the conduit 11 passes through the pusher 2: the pusher 21 is provided with a through hole 2111, which penetrates the inner and outer surfaces of the pusher 21 so that the conduit 11 passes through the through hole 2111 and extends into the interior of the pusher 21, thereby allowing the conduit 11 to pass through part of the inner cavity of the pusher 21. The position of the through hole 2111 can be set as needed, and no specific limitation is made here.
[0182] Furthermore, a handle portion 24 is provided at the proximal end of the main body portion 211. The handle portion 24 is fitted onto the proximal end of the main body portion 211 and fixedly connected thereto. Since the outer surface of the handle portion 24 has a large coefficient of friction, the friction between it and the operator's hand can be increased, preventing slippage during use and ensuring stability during use.
Claims
1. A guiding device for delivering an implant, characterized in that, The device includes a catheter and an expansion fixation member disposed at the distal end of the catheter. The distal end of the catheter communicates with the expansion fixation member to allow fluid to be injected into the expansion fixation member through the catheter. The expansion fixation member is used to extend into a bronchus and is fixed within the bronchus after expansion due to fluid injection. The catheter is used to pass through the interior of an implant so that the implant is inserted along the catheter to a target location within the bronchus. The catheter includes a first portion at a distal end, a second portion at a proximal end, and a first bend connecting the first portion and the second portion; and / or, At least a portion of the expansion fastener is curved.
2. The guide device for delivering the implant according to claim 1, characterized in that, In its natural state, the bending angle α of the first curved portion satisfies 5° ≤ α ≤ 70°; and / or, The bending radius of the first bent portion is greater than 1 mm; and / or, The distance h1 between the first curved portion and the distal end face of the conduit satisfies 3mm ≤ h1 ≤ 30mm; and / or, The outer surface of the inner side of the first curved portion is provided with a marking portion.
3. The guide device for delivering the implant according to claim 1, characterized in that, The second part is provided with a second curved portion.
4. The guide device for delivering the implant according to claim 3, characterized in that, The second curved portion is provided with multiple portions; and / or, The first curved portion is in the shape of a broken line or a curve; and / or, The second curved portion is in the shape of a broken line or a curve.
5. The guide device for delivering the implant according to claim 4, characterized in that, In its natural state, the bending angle b of the second curved portion satisfies 5° ≤ b ≤ 70°; and / or, The bending radius of the second bend is greater than 1 mm; and / or, The distance h2 between the second bend and the distal end face of the conduit satisfies 10mm≤h2≤70mm.
6. The guide device for delivering the implant according to claim 1, characterized in that, The maximum outer diameter of the catheter is less than 2 mm; and / or, The radial support force of the catheter is greater than 5N.
7. The guide device for delivering the implant according to claim 1, characterized in that, The minimum bending radius of the catheter is less than 80 mm; and / or, The coefficient of friction of the outer surface of the conduit is less than 0.1; and / or, The length of the conduit is greater than 0.6m.
8. The guide device for delivering the implant according to claim 1, characterized in that, The outer surface of the catheter is marked with graduations.
9. The guide device for delivering the implant according to claim 1, characterized in that, The conduit and the expansion fastener are connected by adhesive bonding, wire binding, or ultrasonic welding.
10. The guide device for delivering the implant according to claim 1, characterized in that, At least one end of the expansion fixing member is provided with a developing element.