Novel tendon taking device

Abstract

The utility model discloses a novel tendon taking device which comprises a device head, a connecting rod and a gun-shaped handle, the device head is composed of a traction part and a stripping head, the traction part is of a hollow structure, the stripping head is provided with a stripping blunt blade, and a positioning rod is arranged at the rear end of the stripping head; the connecting rod is composed of an inner rod and an outer rod, a positioning cavity matched with the positioning rod is formed in the front end of the inner rod, the positioning rod is placed in the positioning cavity, a spring is arranged between the positioning rod and the positioning cavity, and the outer rod is connected with the traction part; the gun-shaped handle is composed of a handle body and a trigger, the outer rod is fixed at the front end of the handle body, and the inner rod is connected with the trigger and can be pushed forwards under the action of the trigger. The novel tendon taking device provided by the utility model is convenient to operate, can reduce additional damage to donor muscular tissues and muscle attachment amount on tendons during tendon taking, and accelerates the speed of preparing the tendons.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a novel tendon remover. Background Art

[0002] A tendon retriever is a medical device used in tendon transplantation and ligament reconstruction surgery. It is generally a push rod type with a closed or open ring structure at the head end. When in use, the tendon is first inserted into the head end of the closed or open ring structure, the tendon is pulled to push the tendon retriever to the proximal end of the tendon, and then the sharp blade at the head end is used to cut the tendon.

[0003] Patent CN201922135332 discloses a new type of gun-type tendon retriever, which consists of a tendon retriever body with a scale and an open front end, and a tendon retriever handle. The serrated cutter head is connected to the tendon retriever with a scale, and the lower end is a tendon retriever connecting rod. The right side of the cutter push handle is connected to the tendon retriever handle through an elastic sheet. The tendon retriever head with an open front end can be used to determine the required tendon thickness and select the appropriate tendon for cutting. However, this solution can easily cause the serrated head in the front section to cause tendon rupture in the middle when taking the tendon, affecting the length of the tendon, and causing more muscle tissue loss and a large area of ​​trauma, resulting in pain in the donor area after surgery. At the same time, a large amount of tendon-attached muscle is removed, which increases the time for tendon braiding during surgery and affects the progress of the operation. Utility Model Content

[0004] The utility model aims to solve the above-mentioned deficiencies in the prior art and to provide a new tendon remover which is simple to operate, avoids tendon rupture and reduces the amount of muscle loss in the donor area.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted is: it includes an instrument head, a connecting rod and a gun-shaped handle, the instrument head consists of a traction part and a stripping head, the traction part is a hollow structure, used to pass through the tendon, the stripping head is provided with a blunt stripping blade, used to strip the tendon from the muscle, and a positioning rod is provided at the rear end of the stripping head; the connecting rod consists of an inner rod and an outer rod, the front end of the inner rod is provided with a positioning cavity matching the positioning rod, the positioning rod is placed in the positioning cavity, a spring is provided between the positioning rod and the positioning cavity, and the outer rod is connected to the traction part; the gun-shaped handle consists of a handle body and a trigger, the outer rod is fixed at the front end of the handle body, the inner rod is connected to the trigger, and can be pushed forward under the action of the trigger. When the tendon passes through the front end of the traction part, the stripping head presses forward against the tendon under the action of the trigger and the inner rod, and then the tendon remover is pushed forward in a direction parallel to the tendon, and the tendon and muscle are separated under the action of the stripping blunt blade. A spring is provided between the positioning rod and the positioning cavity to provide an elastic external force so that the separation force of the stripping blunt blade meets the physiological force of the tendon-muscle attachment, thereby avoiding tendon rupture and large-scale damage to muscle tissue during the tendon removal process, thereby reducing the amount of muscle loss attached to the tendon.

[0006] As another preferred embodiment of the present invention, the front end of the traction part is a hollow truncated cone structure, the middle part is a semi-open structure, and the rear end is provided with an internal thread; the stripping head is arranged inside the traction part, and the front end is a conical structure that matches the inner cavity of the traction part, and a ring-shaped stripping blunt blade is arranged on the surface. When the tendon is taken, the tendon is squeezed into a shape that fits the inner cavity shape of the front end of the traction part by the stripping head, thereby increasing the contact area between the stripping blunt blade and the tendon, thereby reducing additional damage to the muscle tissue in the donor area and the amount of muscle attachment on the tendon; the outer rod is provided with an external thread, which is detachably connected to the traction part through the thread, and the head can be replaced according to different tendon sizes.

[0007] As another preferred embodiment of the present invention, the traction part is provided with an elliptical release hole, and a limiting groove and a semicircular mounting buckle are provided inside to match the bottom of the stripping head; the stripping head is arranged above the traction part, and a stripping blunt blade is provided at the front end; the outer rod is provided with a mounting groove matching the mounting buckle, and the detachable connection between the traction part and the outer rod is realized by buckling the mounting buckle into the mounting groove.

[0008] As another preferred embodiment of the present invention, the diameter of the inner cavity at the front end of the traction part is 0.6 cm to 1.2 cm, which conforms to the anatomical shape of the tendon.

[0009] As another preferred solution of the present invention, the length of the connecting rod is 20 cm to 30 cm.

[0010] Compared with the prior art, the new tendon remover provided by the utility model has a simple structure and is easy to operate. By arranging a spring inside the head of the device, the separation force of the blunt stripping blade during tendon removal is consistent with the physiological force of tendon-muscle attachment, thereby avoiding tendon rupture and large-scale damage to muscle tissue, thereby shortening the processing time required for tendon trimming and accelerating the speed of tendon preparation; when removing the tendon, the tendon is squeezed into a shape that fits the inner cavity of the front end of the traction part through the stripping head, thereby increasing the contact area between the blunt stripping blade and the tendon, thereby reducing additional damage to the muscle tissue in the donor area and the amount of muscle attachment on the tendon. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the appearance of embodiment 1 of the utility model, Figure 2 It is a front view schematic diagram of embodiment 1 of the utility model, Figure 3 This is a schematic cross-sectional view of the head and the connecting rod of Embodiment 1 of the utility model. Figure 4 This is a schematic diagram of the structure of the traction unit of Embodiment 1 of the utility model. Figure 5 This is a schematic diagram of the structure of the stripping head of Embodiment 1 of the utility model. Figure 6 This is a schematic diagram of the structure of the connecting rod of Embodiment 1 of the utility model. Figure 7This is a schematic diagram of the structure of the inner rod of Embodiment 1 of the utility model. Figure 8 This is a schematic diagram of the structure of the outer rod of Embodiment 1 of the utility model. Fig. 9 This is a schematic cross-sectional view of the head and the connecting rod of Embodiment 2 of the present utility model. Fig.10 This is a schematic diagram of the structure of the traction unit of Embodiment 2 of the utility model. Fig.11 This is a schematic diagram of the structure of the stripping head of Embodiment 2 of the utility model. Fig.12 It is a schematic structural diagram of the outer rod of Example 2 of the utility model.

[0012] Among them: 11-traction part; 111-limiting groove; 112-installing buckle; 12-peeling head; 121-peeling blunt blade; 122-positioning rod; 123-spring; 21-inner rod; 211-positioning cavity; 22-outer rod; 221-installing groove; 31-handle body; 32-trigger. DETAILED DESCRIPTION

[0013] In order to better understand the present invention, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0014] Example 1

[0015] As attached Figure 1-8 As shown, a new type of tendon remover includes an instrument head, a connecting rod and a gun-shaped handle. The instrument head consists of a traction part 11 and a stripping head 12. The inner cavity at the front end of the traction part 11 is a hollow truncated cone structure with a diameter of 0.8 cm at the widest point, a semi-open structure in the middle, and an internal thread is arranged at the rear end; the front end of the stripping head 12 is a conical structure matched with the front end of the traction part 11, and a ring-shaped stripping blunt blade 121 is arranged on the surface, and a positioning rod 122 and a spring 123 are arranged at the rear end; the connecting rod is 25 cm long and consists of an inner rod 21 and an outer rod 22. The inner rod 21 A positioning cavity 211 cooperating with the positioning rod 122 is provided at the front end. After the stripping head 12 passes through the rear end of the traction part 11 and is inserted into the outer rod 22, it is connected to the positioning cavity 211 through the positioning rod 122. The spring 123 is arranged between the positioning rod 122 and the positioning cavity 211; the outer rod 22 is provided with an external thread connected to the internal thread at the rear end of the traction part 11; the gun-shaped handle is composed of a handle body 31 and a trigger 32. The outer rod 22 is fixed at the front end of the handle body 31, and the inner rod 21 is connected to the trigger 32, and can be pushed forward under the action of the trigger 32.

[0016] When removing the tendon, first pass the end of the tendon through the front end inner cavity of the traction part 11 and lead it out from the semi-open structure in the middle of the traction part 11. Clamp the end of the tendon with a vascular clamp, hold the trigger 32, so that the inner rod 21 pushes the stripping head 12 against the tendon, and squeezes the tendon into a shape that fits the front end inner cavity of the traction part 11, thereby increasing the contact area between the stripping blunt blade 121 and the tendon. Then, hold the tendon remover and advance it forward in parallel to the direction of the tendon. Under the action of the stripping blunt blade 121 of the stripping head 12, the tendon and muscle are separated. The increase in the contact area between the stripping blunt blade 121 and the tendon reduces additional damage to the muscle tissue in the donor area and the amount of muscle attachment on the tendon. After reaching a suitable length, the tendon is cut. Since a spring 123 is provided between the inner rod 21 and the stripping head 12, it will be compressed and deformed after encountering a large resistance, so that the separation force of the stripping blunt blade 121 when removing the tendon is consistent with the physiological force of tendon-muscle attachment, and will not generate excessive pressure to cause tendon rupture, and the amount of muscle loss attached to the tendon is reduced, thereby reducing additional trauma, alleviating inflammatory response and pain at the tendon removal site, and shortening the tendon preparation time.

[0017] Example 2

[0018] As attached Figure 9-12 As shown, the traction part 11 is provided with an elliptical release hole, and a limiting groove 111 and a semicircular mounting buckle 112 are provided inside thereof to match the bottom of the stripping head 12; the stripping head 12 is arranged above the traction part 11, and a stripping blunt blade 121 is provided at the front end; the outer rod 22 is provided with a mounting groove 221 matching the mounting buckle 112, and the detachable connection between the traction part 11 and the outer rod 22 is achieved by buckling the mounting buckle 112 into the mounting groove 221. The inner rod 21 and the gun-shaped handle are the same as those in the first embodiment.

[0019] When removing the tendon, first pass the end of the tendon through the release hole of the traction part 11, clamp the end of the tendon with a vascular clamp, hold the trigger 32, let the inner rod 21 drive the stripping head 12 to press against the tendon, then hold the tendon remover and advance it forward parallel to the tendon direction, separate the tendon and muscle under the action of the stripping blunt blade 121 of the stripping head 12, and cut the tendon after reaching the appropriate length.

[0020] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A new tendon remover, characterized in that: It includes the head, connecting rod and gun-shaped handle. The device head is composed of a traction part and a stripping head, the traction part is a hollow structure, the stripping head is provided with a stripping blunt blade, and a positioning rod is provided at the rear end of the stripping head; The connecting rod is composed of an inner rod and an outer rod, the front end of the inner rod is provided with a positioning cavity matched with the positioning rod, the positioning rod is placed in the positioning cavity, a spring is provided between the positioning rod and the positioning cavity, and the outer rod is connected to the traction part; The gun-shaped handle is composed of a handle body and a trigger. The outer rod is fixed to the front end of the handle body, and the inner rod is connected to the trigger and can be pushed forward under the action of the trigger.

2. The new tendon remover as claimed in claim 1, characterized in that: The front end of the traction part is a hollow truncated cone structure, the middle part is a semi-open structure, and the rear end is provided with an internal thread; The stripping head is arranged inside the traction part, the front end of which is a conical structure matched with the inner cavity of the traction part, and the surface of which is provided with an annular stripping blunt blade; The outer rod is provided with an external thread and is detachably connected to the traction part through the thread.

3. The new tendon remover as claimed in claim 1, characterized in that: The traction part is provided with an elliptical release hole, and a limiting groove and a semicircular mounting buckle matching with the bottom of the stripping head are provided inside; The stripping head is arranged above the traction part, and a stripping blunt blade is arranged at the front end; The outer rod is provided with a mounting groove matched with the mounting buckle, and the detachable connection between the traction part and the outer rod is achieved by buckling the mounting buckle into the mounting groove.

4. The new tendon remover as claimed in claim 1, characterized in that: The inner cavity diameter of the traction part is 0.6 cm to 1.2 cm.

5. The new tendon remover as claimed in claim 1, characterized in that: The length of the connecting rod is 20cm to 30cm.

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