Tendon pullback catheter and method of use thereof

Abstract

The present invention belongs to the field of medical technology, and in particular to a tendon pullback guide tube and a method for using the same. The present invention provides a tendon pullback guide tube, comprising: a tube body, which is a flexible member; a connecting ring, one end of which is arranged on the end wall of the tube body and is hollow; a buffer tube, which is sleeved on the other end of the connecting ring and is suitable for sliding relative to the connecting ring; a plurality of limiting strips, one end of which is arranged on the inner wall of the connecting ring and passes through the buffer tube; wherein the tendon is inserted into the buffer tube to be wound and fixed on the inner ring of the connecting ring; when the tube body is pulled back outward, the connecting ring moves outward relative to the buffer tube, and one end of the limiting strip close to the tendon moves toward the tendon to squeeze the limiting tendon. Through the cooperation of the limiting strip and the buffer tube, the limiting strip clamps the limiting tendon when the tube body is pulled back outward, which not only avoids the formation of a bulge between the end of the tendon and the outer wall of the tube body, but also avoids the situation where the tendon falls off from the tube body.

Description

Technical Field

[0001] The invention belongs to the field of medical technology, and specifically relates to surgical instruments, and in particular to a tendon pullback guide tube and a use method thereof. Background Art

[0002] In ligament reconstruction surgery, two windows are generally opened in the patient's skin, and a catheter is passed through the window to tie the retracted tendon to the outer wall of the catheter, and the catheter is pulled back outward to stretch the tendon;

[0003] In the related art, the tendon is tied to the outer wall of the guide tube with sutures. Although the guide tube is a flexible tube, after the tendon is fixed to the outer wall of the guide tube, the binding point of the guide tube and the tendon will be locally bulged compared with other positions of the guide tube. When the guide tube is pulled back outward, the guide tube drives the tendon to move outward, and the bulge will increase the opened channel, thereby increasing the patient's later healing time. Moreover, if the binding is not firm enough, the tendon may loosen from the outer wall of the guide tube.

[0004] Therefore, how to avoid local bulges at the binding site of the drainage tube and the tendon is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0006] The disclosed embodiments at least provide a tendon pullback guide tube and a method for using the same.

[0007] In a first aspect, an embodiment of the present disclosure provides a tendon pullback guide tube, comprising:

[0008] a pipe body, which is a flexible member;

[0009] A connecting ring, one end of which is arranged on the end wall of the pipe body;

[0010] A buffer tube, which is sleeved on the other end of the connecting ring and is suitable for sliding relative to the connecting ring;

[0011] A plurality of limit bars, one end of which is arranged on the inner wall of the connecting ring and penetrates the inner wall of the buffer tube, and the plurality of limit bars are arranged circumferentially around the inner wall of the buffer tube at equal intervals;

[0012] The tendon is inserted into the buffer tube, which is wound and fixed on the inner circle of the connecting ring;

[0013] When the tube body is pulled back outward, the connecting ring moves outward relative to the buffer tube, and the end of the limiting strip close to the tendon moves toward the tendon to squeeze the limiting tendon.

[0014] In an optional embodiment, the buffer tube is provided with an annular groove along the axial direction, the connecting ring is slidably disposed in the annular groove, and a gap is provided between the end wall of the buffer tube and the end wall of the tube body.

[0015] In an optional embodiment, the buffer tube is provided with a plurality of positioning holes in a radial direction, and the positioning holes are communicated with the annular groove;

[0016] The limiting bar is slidably arranged in the positioning hole, and after the limiting bar passes through the positioning hole, two ends of the limiting bar are parallel to the inner wall of the buffer tube respectively.

[0017] In an optional embodiment, a limiting block is disposed at the inner end of the limiting strip, and the limiting block protrudes from the end wall of the buffer tube;

[0018] The limiting block is triangular in shape, and the inclined surface of the limiting block is suitable for abutting against the end wall of the buffer tube;

[0019] When the connecting ring moves outward, the outer end of the limiting strip is pulled outward, and the limiting strip pulls the limiting block to move toward the positioning hole, so that the limiting block squeezes the tendon from the outside to the inside.

[0020] In an optional embodiment, the inner diameter of the connecting ring is larger than the inner diameter of the pipe body;

[0021] The outer diameter of the connecting ring is smaller than the outer diameter of the pipe body.

[0022] In an optional embodiment, the tube body is a flexible member;

[0023] A connecting ring, one end of which is arranged on the end wall of the tube body and is hollow;

[0024] A buffer tube, which is sleeved on the other end of the connecting ring and is suitable for sliding relative to the connecting ring;

[0025] A plurality of limit strips, one end of which is arranged on the inner wall of the connecting ring and passes through the buffer tube;

[0026] A limiting block is disposed at the inner end of the limiting strip, and the limiting block protrudes out of the end wall of the buffer tube;

[0027] The limiting block is triangular in shape, and the inclined surface of the limiting block is suitable for abutting against the end wall of the buffer tube;

[0028] The tendon is inserted into the buffer tube, which is wound and fixed on the inner circle of the connecting ring;

[0029] When the tube body is pulled back outward, the outer end of the limit strip is pulled outward, and the limit strip pulls the limit block to move toward the positioning hole, so that the limit block squeezes the tendon from outside to inside.

[0030] In an optional embodiment, the buffer tube is provided with an annular groove along the axial direction, the connecting ring is slidably disposed in the annular groove, and a gap is provided between the end wall of the buffer tube and the end wall of the tube body.

[0031] In an optional embodiment, the buffer tube is provided with a plurality of positioning holes along the radial direction, and the positioning holes are communicated with the annular groove;

[0032] The limiting bar is slidably arranged in the positioning hole, and after the limiting bar passes through the positioning hole, two ends of the limiting bar are parallel to the inner wall of the buffer tube respectively.

[0033] In a second aspect, the present disclosure also provides a method for using a flow guide tube, the method comprising:

[0034] The tube body drives the buffer tube through the skin to the tendon contraction stop point, inserts the tendon into the buffer tube, and winds it around the inner circle of the connecting ring to fix it;

[0035] The tube body is pulled back outward, the connecting ring moves outward relative to the buffer tube, and the end of the limiting strip close to the tendon moves toward the tendon. Several of the limiting strips are suitable for moving from outside to inside to squeeze the limiting tendon and prevent it from falling off from the buffer tube.

[0036] The beneficial effect of the present invention is that the tendon pull-back guide tube and the use method thereof of the present invention, through the cooperation of the connecting ring, the buffer tube and a plurality of limiting strips, after the tendon is inserted into the buffer tube, it is tied inside the connecting ring, avoiding the bulge formed by the tendon being tied to the outer wall of the tube body. When the tube body is pulled back outward, the end wall of the buffer tube is blocked, and in the process of the connecting ring being pulled back outward relative to the buffer tube, each limiting strip squeezes the tendon from the outside to the inside, so as to improve the stability of the connection between the tendon and the connecting ring, and avoid the tendon from being separated from the connecting ring when the binding is loose.

[0037] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A stereoscopic view of a tendon pullback guide tube provided in an embodiment of the present disclosure;

[0041] Figure 2 A sectional perspective view of the interior of a tube body provided in an embodiment of the present disclosure;

[0042] Figure 3 This is a schematic diagram of the state of the limit block squeezing the tendon provided in an embodiment of the present disclosure.

[0043] In the figure:

[0044] 1. Tube body; 2. Connecting ring; 3. Buffer tube; 30. Ring groove; 31. Positioning hole; 4. Limiting strip; 40. Limiting block; 5. Tendon. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In this article, when it is mentioned that the first component is located on the second component, this may mean that the first component may be directly formed on the second component, or the third component may be interposed between the first component and the second component. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components may be exaggerated or reduced.

[0047] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0048] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "comprise", "include" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0049] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0050] The research found that the disadvantages of the existing technology are: in ligament reconstruction surgery, two windows are generally opened in the patient's skin, and the guide tube passes through the windows to bind the retracted tendon to the outer wall of the guide tube, and the guide tube is pulled back outward to stretch the tendon;

[0051] In the related art, the tendon is tied to the outer wall of the guide tube with sutures. Although the guide tube is a flexible tube, after the tendon is fixed to the outer wall of the guide tube, the binding point of the guide tube and the tendon will be locally bulged compared with other positions of the guide tube. When the guide tube is pulled back outward, the guide tube drives the tendon to move outward, and the bulge will increase the opened channel, thereby increasing the patient's later healing time. Moreover, if the binding is not firm enough, the tendon may loosen from the outer wall of the guide tube.

[0052] Therefore, how to avoid local protrusion at the binding site of the guide tube and the tendon is a technical problem that urgently needs to be solved in the art.

[0053] The defects existing in the above solutions are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present invention in this article for the above problems should be the contributions made by the inventor to the present invention during the disclosure process.

[0054] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0055] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0056] like Figures 1 to 3 As shown, some embodiments provide a tendon 5 pull-back guide tube, including:

[0057] The pipe body 1 is a flexible part; the connecting ring 2 has one end arranged on the end wall of the pipe body and is hollow; the connecting ring 2 has a certain elasticity, and after the end of the tendon 5 is inserted into the connecting ring 2, a suture is used to pass through the connecting ring 2 to wrap and fix the tendon 5 inside the connecting ring 2. The buffer tube 3 is sleeved on the other end of the connecting ring 2 and is suitable for sliding relative to the connecting ring 2; the buffer tube 3 is a flexible part, and the inner and outer diameters of the buffer tube 3 are consistent with the connecting ring 2. A plurality of limit strips 4, one end of which is arranged on the inner wall of the connecting ring 2 and penetrates the inner wall of the buffer tube 3, and a plurality of limit strips 4 are arranged circumferentially around the inner wall of the buffer tube 3 at equal intervals; wherein the tendon 5 is inserted into the buffer tube 3 and is wrapped and fixed on the inner ring of the connecting ring 2; when the pipe body 1 is pulled back outward, the connecting ring 2 moves outward relative to the buffer tube 3, and the end of the limit strip 4 close to the tendon 5 is deformed and convexed toward the tendon 5 to squeeze and limit the tendon 5. Through the cooperation of the connecting ring 2, the buffer tube 3 and the plurality of limiting strips 4, after the tendon 5 is inserted into the buffer tube 3, it is bound inside the connecting ring 2, thereby avoiding the bulge formed by the tendon 5 being bound to the outer wall of the tube body 1. When the tube body 1 is pulled back outward, the end wall of the buffer tube 3 is blocked, and when the connecting ring 2 is pulled back outward relative to the buffer tube 3, the limiting strips 4 squeeze the tendon 5 from the outside to the inside, so as to improve the stability of the connection between the tendon 5 and the connecting ring 2, thereby avoiding the tendon 5 from being separated from the connecting ring 2 when the binding is loosened.

[0058] Reference Figure 2 The buffer tube 3 is provided with an annular groove 30 along the axial direction, the connecting ring 2 is slidably arranged in the annular groove 30, and a gap is provided between the end wall of the buffer tube 3 and the end wall of the pipe body 1. A positioning block is provided on the inner wall of the annular groove 30 close to the pipe body 1, and a limiting groove matched with the positioning block is provided on the outer wall of the connecting ring 2, and the positioning block is suitable for sliding in the limiting groove; the positioning block is suitable for blocking the connecting ring 2 to prevent it from being separated from the annular groove 30.

[0059] Furthermore, the buffer tube 3 is provided with a plurality of positioning holes 31 in the radial direction, and the positioning holes 31 are connected to the annular groove 30; one positioning hole 31 corresponds to one limiting strip 4. The limiting strip 4 is suitable for sliding in the positioning hole 31, and after the limiting strip 4 passes through the positioning hole 31, its inner end is parallel to the inner wall of the buffer tube 3. The outer end of the limiting strip 4 is fixed to the inner wall of the connecting ring 2, and the inner end of the limiting strip 4 is arranged on the inner ring of the buffer tube 3.

[0060] Reference Figure 2 The inner end of the limit strip 4 is provided with a limit block 40, and the limit block 40 protrudes from the end wall of the buffer tube 3; the limit strip 4 is in a "U" shape, and when the connecting ring 2 moves outward relative to the buffer tube 3, the connecting ring 2 pulls the inner end of the limit strip 4 to slide outward, and the linkage bar pulls the limit block 40 to slide in the direction of the positioning hole 31. The limit block 40 is triangular, and the inclined surface of the limit block 40 is suitable for abutting against the end wall of the buffer tube 3; wherein, when the connecting ring 2 moves outward, the outer end of the limit strip 4 is pulled outward, and the limit strip 4 pulls the limit block 40 to move in the direction of the positioning hole 31, so that the limit block 40 squeezes the tendon 5 from the outside to the inside.

[0061] Furthermore, the inner diameter of the connecting ring 2 is larger than the inner diameter of the pipe body 1;

[0062] The outer diameter of the connecting ring 2 is smaller than the outer diameter of the pipe body 1 .

[0063] Some embodiments provide a tendon 5 pull-back guide tube, characterized in that it includes:

[0064] The pipe body 1 is a flexible member;

[0065] A connecting ring 2, one end of which is arranged on the end wall of the tube body and is hollow;

[0066] A buffer tube 3, which is sleeved on the other end of the connecting ring 2 and is suitable for sliding relative to the connecting ring 2;

[0067] A plurality of limit strips 4, one end of which is arranged on the inner wall of the connecting ring 2 and passes through the buffer tube 3;

[0068] A limiting block 40 is disposed at the inner end of the limiting strip 4, and the limiting block 40 protrudes from the end wall of the buffer tube 3;

[0069] The limiting block 40 is triangular in shape, and the inclined surface of the limiting block 40 is suitable for abutting against the end wall of the buffer tube 3;

[0070] The tendon 5 is inserted into the buffer tube 3 and is wound and fixed on the inner ring of the connecting ring 2;

[0071] When the tube body 1 is pulled back outward, the outer end of the limiting strip 4 is pulled outward, and the limiting strip 4 pulls the limiting block 40 to move toward the positioning hole 31, so that the limiting block 40 squeezes the tendon 5 from the outside to the inside.

[0072] Furthermore, the buffer tube 3 is provided with an annular groove 30 along the axial direction, the connecting ring 2 is slidably disposed in the annular groove 30 , and a gap is provided between the end wall of the buffer tube 3 and the end wall of the tube body 1 .

[0073] Furthermore, the buffer tube 3 is provided with a plurality of positioning holes 31 along the radial direction, and the positioning holes 31 are connected with the annular groove 30;

[0074] The limiting strip 4 is slidably disposed in the positioning hole 31 , and after the limiting strip 4 passes through the positioning hole 31 , two ends thereof are parallel to the inner wall of the buffer tube 3 .

[0075] Some embodiments provide a method for using a flow guide tube, the method comprising:

[0076] The tube body 1 drives the buffer tube 3 through the skin to the contraction stop of the tendon 5, inserts the tendon 5 into the buffer tube 3, and winds and fixes it on the inner circle of the connecting ring 2;

[0077] The tube body 1 is pulled back outward, the connecting ring 2 moves outward relative to the buffer tube 3, and the end of the limiting strip 4 close to the tendon 5 moves toward the tendon 5. Several of the limiting strips 4 are suitable for moving from outside to inside to squeeze the limiting tendon 5 to prevent it from falling off from the buffer tube 3.

[0078] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in this document unless explicitly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0080] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A tendon pullback guide tube, characterized in that: include: a pipe body, which is a flexible member; A connecting ring, one end of which is arranged on the end wall of the tube body and is hollow; A buffer tube, which is sleeved on the other end of the connecting ring and is suitable for sliding relative to the connecting ring; A plurality of limit strips, one end of which is arranged on the inner wall of the connecting ring and passes through the buffer tube; A limiting block is arranged at the inner end of the limiting strip, and the limiting block protrudes from the end wall of the buffer tube; The limiting block is triangular in shape, and the inclined surface of the limiting block is suitable for abutting against the end wall of the buffer tube; The tendon is inserted into the buffer tube and is wound around and fixed to the inner circle of the connecting ring; When the tube body is pulled back outward, the outer end of the limit strip is pulled outward, and the limit strip pulls the limit block to move toward the positioning hole, so that the limit block squeezes the tendon from the outside to the inside; The buffer tube is provided with an annular groove along the axial direction, the connecting ring is slidably arranged in the annular groove, and a gap is arranged between the end wall of the buffer tube and the end wall of the tube body.

2. The tendon pullback catheter according to claim 1, characterized in that: The buffer tube is provided with a plurality of positioning holes along the radial direction, and the positioning holes are connected with the annular groove; The limiting strip is slidably arranged in the positioning hole, and after the limiting strip passes through the positioning hole, two ends of the limiting strip are respectively parallel to the inner wall of the buffer tube.

3. A tendon pullback guide tube, characterized in that: include: a pipe body, which is a flexible member; A connecting ring, one end of which is arranged on the end wall of the pipe body; A buffer tube, which is sleeved on the other end of the connecting ring and is suitable for sliding relative to the connecting ring; A plurality of limit bars, one end of which is arranged on the inner wall of the connecting ring and penetrates the inner wall of the buffer tube, and the plurality of limit bars are arranged circumferentially around the inner wall of the buffer tube at equal intervals; The tendon is inserted into the buffer tube and is wound around and fixed to the inner circle of the connecting ring; When the tube body is pulled back outward, the connecting ring moves outward relative to the buffer tube, and the end of the limiting strip close to the tendon is deformed and bulged toward the tendon to squeeze the limiting tendon; The buffer tube is provided with an annular groove along the axial direction, the connecting ring is slidably arranged in the annular groove, and a gap is provided between the end wall of the buffer tube and the end wall of the tube body; The buffer tube is provided with a plurality of positioning holes along the radial direction, and the positioning holes are connected with the annular groove; The limiting strip is suitable for sliding in the positioning hole, and after the limiting strip passes through the positioning hole, the inner end thereof is parallel to the inner wall of the buffer tube; A limiting block is arranged at the inner end of the limiting strip, and the limiting block protrudes from the end wall of the buffer tube; The limiting block is triangular in shape, and the inclined surface of the limiting block is suitable for abutting against the end wall of the buffer tube; When the connecting ring moves outward, the outer end of the limiting strip is pulled outward, and the limiting strip pulls the limiting block to move toward the direction of the positioning hole, so that the limiting block squeezes the tendon from the outside to the inside.

4. The tendon pullback catheter according to claim 3, characterized in that: The inner diameter of the connecting ring is larger than the inner diameter of the pipe body; The outer diameter of the connecting ring is smaller than the outer diameter of the pipe body.

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