Tendon broken end traction device based on negative pressure

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a tendon broken end traction device based on negative pressure, which comprises a tendon sheath positioning structure, a tendon sheath positioning structure and a tendon sheath positioning structure, the tendon sheath positioning structure comprises a positioning sleeve and an inflatable balloon, the positioning sleeve is used for creating a working channel in a tendon sheath, and the inflatable balloon is used for filling and plugging an outlet of the tendon sheath and is fixed on the outer wall of the positioning sleeve; the traction mechanism comprises a function conversion structure, a hyaluronic acid injection structure and a negative pressure suction structure, the function conversion structure is provided with three ports which are connected with the hyaluronic acid injection structure, the negative pressure suction structure and the functional catheter respectively, and the free end of the functional catheter enters the tendon sheath through the positioning sleeve and searches for the broken end of the tendon. The tendon broken end is dragged to reset through negative pressure suction, the non-invasive, accurate, efficient and convenient purposes are achieved, and the risks of tendon and tendon sheath damage and additional incision making can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a tendon stump traction device based on negative pressure. Background Art

[0002] Among hand injuries, flexor tendon injury and rupture are one of the most common injuries. For hand surgeons, flexor tendon repair is a challenging problem that requires carefully planned management to achieve effective results. When the flexor tendon is ruptured, the proximal flexor tendon will retract toward the palm (proximal end of injury) as the muscle contracts. At this time, exploring the tendon and repositioning the ruptured tendon are the biggest challenges facing hand surgeons. The tendon stump should be handled in a non-traumatic manner, because any micro-damage to the sheath and tendon may lead to poor functional outcomes and cause scarring and adhesions, leading to poor postoperative recovery.

[0003] Traditional methods for exploring the retracted tendon stump include: flexing the wrist joint and metacarpophalangeal joint, and the surgeon pushes or spirally wraps the tendon from proximal to distal with his hands or elastic tape, so that the proximal end of the ruptured tendon is gradually pushed out, and then clamped with a vascular clamp and pulled to the distal end for fixation, and then sutured. If it does not work, it is necessary to determine the position of the proximal stump according to the level of tendon rupture and other conditions, make another incision to find the tendon stump, assist in its reduction and fixation, and then suture. The defects of the traditional method are: 1. The tendon or tendon sheath may be damaged during the operation; 2. Another incision needs to be made at the proximal end of the palm, which increases trauma. At present, many methods have been reported. For example: (1) Morris et al. used skin retractors to explore the tendon stump (1993); (2) Pennington used a negative pressure suction catheter, but the success rate was poor, and failure was common in the thumb area (1977); (3) Kilgore et al. (1971), Weeks and Wray (1973), Ersek et al. (1985), Sourmelis et al. (1987), Titley (1996), Ozturk et al. (2013), etc. used various types of catheters or silicone rods or flexible tendon retrievers to reposition the retracted flexor tendon. Although the above three methods are improved over the traditional methods and have the advantages of convenience and speed, they still have the risk of damaging the tendon stump or tendon sheath, and some methods inevitably require another incision at the proximal end. (4) Hill et al. (1997), Shen Xiangqian et al. (2003), and Kucukguven, A. et al. (2019) all reported on locating and repositioning the tendon ends under direct endoscopic vision and proved that the method was effective. This method is effective and avoids damage to the tendon and tendon sheath, but its operation requires the preparation of corresponding endoscopes, display screens and other instruments, which is not convenient and quick.

[0004] Therefore, based on these problems, it is of great practical significance to design a convenient, fast, safe, and non-traumatic tendon end traction device. Utility Model Content

[0005] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a tendon stump traction device based on negative pressure which can achieve the purposes of being non-invasive, precise, efficient and convenient, and can also avoid the risks of damaging the tendon, tendon sheath and making another incision.

[0006] The technical solution adopted by the utility model to solve this problem is:

[0007] A tendon stump traction device based on negative pressure, comprising:

[0008] A tendon sheath positioning structure, comprising a positioning sleeve for creating a working channel in the tendon sheath and an inflatable balloon for filling and blocking the tendon sheath outlet, wherein the inflatable balloon is fixed on the outer wall of the positioning sleeve;

[0009] The traction mechanism includes a function conversion structure, a hyaluronic acid injection structure and a negative pressure suction structure. The function conversion structure has three ports, which are respectively connected to the hyaluronic acid injection structure, the negative pressure suction structure and the functional catheter. The free end of the functional catheter enters the tendon sheath through a positioning sleeve and explores the tendon stump.

[0010] Preferably, the positioning sleeve is a bent sleeve with a certain bending angle, and the positioning sleeve comprises a straight tube front portion, a bent portion and a straight tube rear portion which are connected in sequence.

[0011] Further preferably, the inflatable balloon is fixed on the outer wall of the front part of the straight tube on one side close to the bending part, the inflatable balloon is connected to an inflation tube, and the inflation tube is connected to an inflation nozzle.

[0012] Further preferably, the function conversion structure is a three-way valve structure, the first port of the function conversion structure is connected to a functional catheter, the second port is connected to a liquid injection connector, and the third port is connected to a negative pressure suction connector.

[0013] Further preferably, the hyaluronic acid injection structure comprises a syringe filled with hyaluronic acid liquid, and the injection end of the syringe is detachably mounted on the liquid injection connector.

[0014] Further preferably, the negative pressure suction structure includes a negative pressure suction device and a negative pressure suction pipeline, one end of the negative pressure suction pipeline is connected to the negative pressure suction device, and the other end is detachably mounted on the negative pressure suction connector.

[0015] Further preferably, an ultrasonic imaging ring for positioning is provided on the outer wall of the insertion end of the functional catheter.

[0016] Further preferably, an ultrasonic imaging mark for positioning is provided on the outer wall of the inflatable balloon.

[0017] Further preferably, the bending portion is a folded tube structure connected between the front portion of the straight tube and the rear portion of the straight tube.

[0018] Further preferably, an internal thread is provided on the inner wall of the free end of the rear portion of the straight tube, and the internal thread of the free end of the rear portion of the straight tube is connected to a threaded locking cap plug, and a through channel for a functional catheter to pass through is opened on the threaded locking cap plug, and the threaded locking cap plug includes a small cylindrical portion, a locking frustum portion, and a large cylindrical portion which are connected in sequence, and a compression seam connected to the through channel is opened on the threaded locking cap plug.

[0019] Further preferably, the functional catheter is a telescopic tube structure, including a thick tube portion and a thin tube portion inserted together, one end of the thick tube portion is connected to the port of the functional conversion structure, and the other end is formed with a truncated cone-shaped threaded tube with a gradually decreasing diameter, a compression seam is opened on the truncated cone-shaped threaded tube, and a locking nut is threadedly connected to the truncated cone-shaped threaded tube.

[0020] The advantages and positive effects of the utility model are:

[0021] 1. In the utility model, a positioning sleeve with an inflatable balloon is placed in the tendon sheath, and then the inflatable balloon is inflated to fill the outlet of the tendon sheath. Subsequently, a functional catheter is placed in the positioning sleeve 1, and under the guidance of ultrasound, the tendon stump is explored along the tendon sheath. Then, hyaluronic acid or sodium hyaluronate is injected into the catheter through the hyaluronic acid injection structure. After the sodium hyaluronate fills the tendon sheath, negative pressure is applied to the functional catheter through the negative pressure suction structure, so that the tendon is adsorbed on the functional catheter under the action of negative pressure. The functional catheter is withdrawn while maintaining the negative pressure, and finally the tendon stump is repositioned by traction through negative pressure suction, thereby achieving the purposes of non-invasive, precise, efficient and convenient, and also avoiding the risks of damaging the tendon and tendon sheath and making another incision.

[0022] 2. The utility model combines the advantages of ultrasound being non-invasive, convenient and fast, and utilizes ultrasound positioning to achieve an effect similar to that of direct endoscopy.

[0023] 3. The positioning sleeve with an inflatable balloon used in the utility model is small and convenient. After the inflatable balloon is inflated, it can block the tendon sheath outlet, provide space for subsequent positioning catheter operations, and avoid the possibility of surrounding air leakage during negative pressure.

[0024] 4. In the utility model, sodium hyaluronate is injected into the tendon sheath to protect and lubricate the tendon sheath. Afterwards, negative pressure is applied to the functional catheter through the negative pressure suction structure, so that the tendon is adsorbed on the functional catheter under the action of negative pressure. The functional catheter is withdrawn while maintaining the negative pressure, so that the tendon can be withdrawn along with the functional catheter, thereby ultimately achieving the purpose of reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The technical solution of the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for the purpose of explanation and are not intended to limit the scope of the utility model. In addition, unless otherwise specified, these drawings are only intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0026] Figure 1 This is a schematic diagram of the structure of Example 1 Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of Example 1 Figure 2 ;

[0028] Figure 3 is a front view of Example 1;

[0029] Figure 4 is a top view of Example 1;

[0030] Figure 5 This is a schematic diagram of the tendon sheath positioning structure. Figure 1 ;

[0031] Figure 6 This is a schematic diagram of the tendon sheath positioning structure. Figure 2 ;

[0032] Figure 7 It is the front view of the tendon sheath positioning structure;

[0033] Figure 8 It is a cross-sectional view of the tendon sheath positioning structure;

[0034] Fig. 9 This is a schematic diagram of the traction mechanism. Figure 1 ;

[0035] Fig.10 This is a schematic diagram of the traction mechanism. Figure 2 ;

[0036] Fig.11 It is the front view of the traction mechanism;

[0037] Fig.12 This is a schematic diagram of the structure of Example 2 Figure 1 ;

[0038] Fig.13 yes Fig.12 Exploded diagram of

[0039] Fig.14 This is a schematic diagram of the structure of Example 2 Figure 2 ;

[0040] Fig.15 yes Fig.14 Exploded diagram of

[0041] Fig.16 is a front view of Example 2;

[0042] Fig.17 yes Fig.16 Exploded diagram of

[0043] Fig.18 This is a top view of Example 2.

[0044] In the figure: 1-positioning sleeve; 101-front part of the straight tube; 102-bending part; 103-rear part of the straight tube; 2-inflatable balloon; 3-function conversion structure; 4-functional catheter; 401-thick tube part; 402-thin tube part; 403-truncated cone threaded tube; 404-locking nut; 5-inflating tube; 6-liquid injection connector; 7-negative pressure suction connector; 8-syringe; 9-ultrasound development ring; 10-ultrasound development mark; 11-threaded locking cap. DETAILED DESCRIPTION

[0045] First of all, it should be noted that the specific structure, features and advantages of the present invention will be specifically described below by way of example, but all descriptions are only for illustration and should not be understood as limiting the present invention in any way. In addition, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature displayed or implied in the drawings, can still be combined or deleted between these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned in this document. In addition, in order to simplify the drawings, the same or similar technical features may be marked in only one place in the same drawing.

[0046] In the present utility model, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "fixation", "screwing" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. The present utility model is described in detail below in conjunction with the accompanying drawings.

[0047] Embodiment 1:

[0048] A tendon stump traction device based on negative pressure comprises: a tendon sheath positioning structure, which comprises a positioning sleeve 1 for creating a working channel in the tendon sheath and an inflatable balloon 2 for filling and blocking the tendon sheath outlet, wherein the inflatable balloon 2 is fixed on the outer wall of the positioning sleeve 1; a traction mechanism, which comprises a function conversion structure 3, a hyaluronic acid injection structure and a negative pressure suction structure, wherein the function conversion structure 3 has three ports, which are respectively connected to the hyaluronic acid injection structure, the negative pressure suction structure and a functional catheter 4, wherein the free end of the functional catheter 4 enters the tendon sheath through the positioning sleeve 1 and searches for the tendon stump.

[0049] In this embodiment, Figure 1-11 As shown, after the tendon sheath is detected, a positioning sleeve with an inflatable balloon is placed in the tendon sheath. The positioning sleeve has different angles of 30°, 45°, 60°, 90°, etc., which can be used in various situations. After the positioning sleeve is placed, the inflatable balloon is inflated to fill the tendon sheath outlet, and then an 8F suction catheter, 8F negative pressure sleeve or other similar catheter is placed in the positioning sleeve 1 as a functional catheter. Taking this embodiment as an example, the functional catheter uses an 8F negative pressure catheter, and under the guidance of ultrasound (ultrasound has been proven to be able to detect the retracted flexor tendon stump and can be used to guide tendon repair), it enters along the tendon sheath to explore the tendon stump. When exploring the tendon stump, hyaluronic acid or sodium hyaluronate is injected into the catheter through the hyaluronic acid injection structure (sodium hyaluronate is widely distributed and is an important component of the extracellular matrix of cartilage, synovial fluid, skin and aqueous humor. Intra-articular injection of sodium hyaluronate for local treatment of osteoarthritis has been used in humans for more than 30 years. It was initially mainly used for knee osteoarthritis. Now it is increasingly used in other joints. Its safety and effectiveness are worthy of recognition. Sodium hyaluronate injected into the tendon sheath can protect and lubricate the tendon sheath). After the tendon sheath is filled with sodium hyaluronate, negative pressure is given to the functional catheter through the negative pressure suction structure, so that the tendon is adsorbed on the functional catheter under the action of negative pressure. The functional catheter is withdrawn while maintaining the negative pressure, so that the tendon can be withdrawn along with the functional catheter, ultimately achieving the purpose of reduction.

[0050] This device combines ultrasound guidance with the use of tools or materials such as a small cannula with an inflatable balloon, an 8F negative pressure cannula, and sodium hyaluronate. It can quickly, accurately, and effectively detect the broken end of the flexor tendon and reposition it non-invasively, providing a guarantee for the subsequent suture repair of the ruptured tendon. While ensuring convenience and speed, it also avoids the risk of damaging the tendon, tendon sheath, and making another incision. Among them, ultrasound machines are widely used in general surgery, can be equipped in operating rooms, and can be easily obtained; small cannulas with balloons have simple principles, are small in size, and are easy to make; 8F negative pressure catheters or other similar catheters are easily available in operating rooms, and sodium hyaluronate is a commonly used material for the treatment of osteoarthritis and is easy to obtain. The instruments and materials used in this device can be easily made or obtained, and are worthy of recognition in terms of practicality.

[0051] This device has the following advantages:

[0052] (1) Combining the advantages of ultrasound being non-invasive, convenient and fast, ultrasound positioning can achieve an effect similar to that of direct endoscopy;

[0053] (2) The positioning cannula with an inflatable balloon is small and convenient. After the inflatable balloon is inflated, it can block the tendon sheath outlet, provide space for subsequent positioning catheter operation, and avoid the possibility of peripheral air leakage during negative pressure.

[0054] (3) 8F negative pressure cannula can be quickly obtained in the operating room. Sodium hyaluronate is a commonly used material for the treatment of osteoarthritis and can also be quickly obtained. The use of sodium hyaluronate can avoid damaging the tendon sheath during the negative pressure process.

[0055] (4) Compared with the old catheters, the new negative pressure catheter has significantly improved inertness, lubricity and biocompatibility, and can also avoid damage to the tendon sheath and tendon ends during operation.

[0056] Furthermore, it can also be considered in this embodiment that the positioning sleeve 1 is a bending sleeve with a certain bending angle, and the positioning sleeve 1 includes a straight tube front part 101, a bending part 102 and a straight tube rear part 103 connected in sequence. The positioning sleeve has different angles such as 30°, 45°, 60°, 90°, etc., which can be used in various situations. The total length of the sleeve is about 1-2cm, and the length is adjusted according to different angles. The inner diameter of the sleeve itself is divided into three specifications of 2mm, 2.5mm and 3mm. The part inserted into the tendon sheath is designed to have an air bag, which plays the role of filling the tendon sheath outlet after inflation. Specifically: After the tendon sheath is explored, a positioning sleeve with an inflatable balloon is placed in the tendon sheath. After the positioning sleeve is placed, the inflatable balloon is inflated to fill the tendon sheath outlet, and then a functional catheter is placed in the positioning sleeve. The tendon stump is located under ultrasound guidance, and the functional catheter is guided to the vicinity of the tendon stump. Finally, the tendon stump is repositioned by negative pressure suction traction, so as to achieve the purpose of non-invasive, precise, efficient and convenient.

[0057] Furthermore, in this embodiment, it can also be considered that the inflatable balloon 2 is fixed on the outer wall of the front portion 101 of the straight tube near the bending portion 102, and the inflatable balloon 2 is connected to an inflation tube 5, and the inflation tube 5 is connected to an inflation nozzle.

[0058] Furthermore, in the present embodiment, it can also be considered that the function conversion structure 3 is a three-way valve structure, the first port of the function conversion structure 3 is connected to a function catheter 4, the second port is connected to a liquid injection connector 6, and the third port is connected to a negative pressure suction connector 7. A three-way valve is installed at the tail of the 8F negative pressure catheter. After the three-way valve is installed, one end of the three-way valve is connected to a hyaluronic acid injection structure, such as a syringe or other similar injection device, which contains sodium hyaluronate for lubricating and protecting the tendon sheath and the tendon end, and is used to inject sodium hyaluronate into the tendon sheath; the other end of the three-way valve is connected to a negative pressure suction structure, which can be a negative pressure suction device commonly used in operating rooms, to play the role of negative pressure traction to reset the tendon end.

[0059] Furthermore, in this embodiment, it can also be considered that the hyaluronic acid injection structure includes a syringe 8 filled with hyaluronic acid liquid, and the injection end of the syringe 8 is detachably mounted on the liquid injection connector 6.

[0060] Furthermore, in this embodiment, it can also be considered that the negative pressure suction structure includes a negative pressure suction device and a negative pressure suction pipeline, one end of the negative pressure suction pipeline is connected to the negative pressure suction device, and the other end is detachably mounted on the negative pressure suction connector 7.

[0061] Embodiment 2:

[0062] Embodiment 2 of the present invention is further improved on the basis of embodiment 1 so as to give full play to the technical advantages of the present invention, which is described below by way of example.

[0063] For example: Figure 12-18 As shown, an ultrasonic imaging ring 9 for positioning is provided on the outer wall of the insertion end of the functional catheter 4. Combined with ultrasound-guided positioning, the functional catheter is guided to the vicinity of the tendon stump, achieving the purpose of accuracy, efficiency and convenience, and greatly improving the therapeutic effect.

[0064] Furthermore, in this embodiment, it can also be considered that an ultrasonic imaging mark 10 for positioning is provided on the outer wall of the inflatable balloon 2. Combined with ultrasound-guided positioning, the inflatable balloon is inflated when located at the exit of the tendon sheath to achieve accurate blocking, provide space for subsequent positioning catheter operations, and avoid the possibility of surrounding air leakage during negative pressure.

[0065] Furthermore, in the present embodiment, it can also be considered that the bending portion 102 is a folding tube structure connected between the straight tube front portion 101 and the straight tube rear portion 103. The folding tube can adjust the angle between the straight tube front portion 101 and the straight tube rear portion 103 through a folding operation, so that it can be used in various situations.

[0066] Furthermore, in the present embodiment, it is also possible to consider that an internal thread is provided on the inner wall of the free end of the straight tube rear portion 103, and the internal thread of the free end of the straight tube rear portion 103 is connected to a threaded locking cap plug 11, and a through channel for the functional catheter 4 to pass through is opened on the threaded locking cap plug 11, and the threaded locking cap plug 11 includes a small cylindrical portion, a locking frustum portion, and a large cylindrical portion connected in sequence, and a compression seam connected to the through channel is opened on the threaded locking cap plug 11, and the threaded locking cap plug 11 is sleeved on the functional catheter. When it is necessary to lock the position of the functional catheter and seal the gap between the functional catheter and the positioning sleeve, the threaded locking cap plug 11 is rotated to rotate it in the direction of the positioning sleeve, and the compression seam is compressed accordingly, so as to achieve locking and sealing between the functional catheter and the positioning sleeve, and when it is necessary to remove the functional catheter, the threaded locking cap plug can be rotated in the opposite direction.

[0067] Furthermore, in this embodiment, it can also be considered that the functional conduit 4 is a telescopic tube structure, and the total length of the functional conduit can be adjusted according to demand.

[0068] Furthermore, in the present embodiment, it can also be considered that the functional conduit 4 includes a thick tube portion 401 and a thin tube portion 402 which are inserted together, one end of the thick tube portion 401 is connected to the port of the function conversion structure 3, and the other end is formed with a truncated cone-shaped threaded tube 403 with a gradually decreasing diameter, a compression seam is opened on the truncated cone-shaped threaded tube 403, and a locking nut 404 is threadedly connected to the truncated cone-shaped threaded tube 403. When it is necessary to adjust the length of the functional conduit, the locking nut 404 is rotated to move toward the direction of the thin tube portion 402, and when it is necessary to lock the length of the functional conduit, the locking nut 404 is rotated in the opposite direction, and the compression seam is compressed accordingly, thereby achieving locking and sealing between the thick tube portion 401 and the thin tube portion 402.

[0069] It should be noted that this technology has been previously operated on experimental animals and gross specimens to prove the feasibility and advantages of the device, avoiding the need to make another incision at the proximal end of the ruptured tendon during surgery. Among hand injuries, finger flexor tendon injury and rupture are one of the most common injuries. For hand surgeons, the repair of the flexor tendon is a challenging problem, which requires carefully planned management to achieve effective results. When the flexor tendon is ruptured, the proximal end of the flexor tendon will contract toward the palm (proximal end of the injury) as the muscle contracts. At this time, exploring the tendon and resetting the ruptured tendon is the biggest challenge facing hand surgeons. The tendon stump should be handled in a non-traumatic manner, because any micro-damage to the sheath and tendon may lead to poor functional results, and cause scars and adhesions, leading to poor postoperative recovery. This device has a high practical value for emergency surgery of hand trauma tendon rupture, and largely avoids secondary damage to the tendon and tendon sheath, providing a guarantee for a good prognosis of surgery and recovery of hand function.

[0070] The above embodiments describe the present invention in detail, but the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of application of the present invention shall still fall within the scope of the patent coverage of the present invention.

Claims

1. A tendon stump traction device based on negative pressure, characterized in that: include: A tendon sheath positioning structure, comprising a positioning sleeve (1) for creating a working channel in the tendon sheath and an inflatable balloon (2) for filling and blocking the outlet of the tendon sheath, wherein the inflatable balloon (2) is fixed on the outer wall of the positioning sleeve (1); The traction mechanism comprises a function conversion structure (3), a hyaluronic acid injection structure and a negative pressure suction structure. The function conversion structure (3) has three ports, which are respectively connected to the hyaluronic acid injection structure, the negative pressure suction structure and a functional catheter (4). The free end of the functional catheter (4) enters the tendon sheath through a positioning sleeve (1) and searches for the tendon stump.

2. A tendon stump traction device based on negative pressure according to claim 1, characterized in that: The positioning sleeve (1) is a bent sleeve with a certain bending angle, and comprises a straight tube front portion (101), a bent portion (102) and a straight tube rear portion (103) which are connected in sequence.

3. A tendon stump traction device based on negative pressure according to claim 2, characterized in that: The inflatable balloon (2) is fixed on the outer wall of the front portion (101) of the straight tube on one side close to the bent portion (102), the inflatable balloon (2) is connected to an inflatable tube (5), and the inflatable tube (5) is connected to an inflatable nozzle.

4. A tendon stump traction device based on negative pressure according to claim 1, characterized in that: The function conversion structure (3) is a three-way valve structure, the first port of the function conversion structure (3) is connected to a function catheter (4), the second port is connected to a liquid injection connector (6), and the third port is connected to a negative pressure suction connector (7).

5. A tendon stump traction device based on negative pressure according to claim 4, characterized in that: The hyaluronic acid injection structure comprises a syringe (8) filled with hyaluronic acid liquid, and the injection end of the syringe (8) is detachably mounted on the liquid injection connector (6).

6. A tendon stump traction device based on negative pressure according to claim 4, characterized in that: The negative pressure suction structure comprises a negative pressure suction device and a negative pressure suction pipeline. One end of the negative pressure suction pipeline is connected to the negative pressure suction device, and the other end is detachably mounted on the negative pressure suction connector (7).

7. A tendon stump traction device based on negative pressure according to claim 1, characterized in that: An ultrasonic imaging ring (9) for positioning is provided on the outer wall of the insertion end of the functional catheter (4).

8. A tendon stump traction device based on negative pressure according to claim 1, characterized in that: An ultrasonic imaging mark (10) for positioning is provided on the outer wall of the inflatable balloon (2).

9. A tendon stump traction device based on negative pressure according to claim 2 or 3, characterized in that: The bending portion (102) is a folded tube structure connected between the straight tube front portion (101) and the straight tube rear portion (103).

10. A tendon stump traction device based on negative pressure according to any one of claims 1 to 8, characterized in that: The functional conduit (4) is a telescopic tube structure.

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