Special scalpel assembly for tendon sheath release

Abstract

The invention discloses a scalpel assembly special for tendon sheath release. The scalpel assembly comprises a grip and a scalpel body. The front end of the grip is rotationally connected with the cutter body; the upper portion of the knife body is provided with a covering end, the lower portion is provided with a tendon end, and the middle of the rear end is provided with a connecting rod rotationally connected with the handle. The front end of the tendon end is fusiform, and a binding surface is arranged on one surface far away from the knife body; the binding face is arranged to be an inwards-concave curved face. In the tendon sheath release operation, the binding face can be tightly attached to the surface of the tendon, the situation that due to the fact that a traditional scalpel is difficult to be tightly attached to the tendon, the tendon is cut by mistake due to slight deviation in the operation process is effectively avoided, the operation risk is greatly reduced, and the occurrence probability of postoperative tendon dysfunction and other serious complications is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of surgical knives, and in particular relates to a surgical knife component specially used for releasing the tendon sheath. Background Art

[0002] The tendon sheath, a vital structure protecting the tendon, is frequently used in daily activities and is susceptible to tendon sheath diseases due to strain, inflammation, and other factors. Common tendon sheath diseases, such as stenosing tenosynovitis, often cause patients to experience symptoms such as pain and limited mobility, severely impacting their quality of life and work ability. Currently, surgical treatment is one of the most important means of alleviating the symptoms of tendon sheath diseases and restoring the normal function of the tendon sheath, with tenolysis being the most widely used procedure. In the prior art, the blade design of traditional scalpels is relatively simple. When performing tenolysis surgery, it is difficult to fit closely with the tendon to achieve precise cutting. The tendon sheath is closely adjacent to the tendon and has a complex anatomical structure. If a traditional scalpel deviates slightly during operation, it is very easy to accidentally cut the tendon, which not only increases the risk of surgery, but may also cause serious complications such as postoperative tendon dysfunction. At the same time, the distribution position and direction of the tendon sheath in the human body vary. When performing tenolysis, the doctor needs to adjust the contact angle between the blade and the tendon sheath according to the actual situation. However, the blade and handle of the traditional scalpel are fixedly connected, and the angle cannot be adjusted. As a result, when facing complex anatomical structures, the doctor cannot flexibly adjust the blade angle to achieve the optimal operating state, which seriously affects the surgical effect and may even cause unnecessary damage to surrounding tissues due to poor angles. Therefore, in response to the above-mentioned existing technical problems, the present invention proposes a surgical knife assembly specifically for tendon sheath release. Summary of the Invention

[0003] In order to solve the above-mentioned problems of the prior art, the present invention designs a surgical knife assembly specifically for tendon sheath release. By providing a concave tendon end at the bottom of the knife body, the tendon end is attached to the tendon surface when cutting the tendon sheath, limiting the cutting depth, avoiding accidental injury to the tendon, and ensuring complete removal of the tendon sheath. At the same time, by providing a connector at the front end of the handle to rotatably connect the knife body, the device can adjust the angle of the knife body in real time according to needs during actual use, thereby improving the applicability of the device. In order to achieve the above technical effects, the present invention is implemented through the following technical solutions: a surgical knife assembly specifically for tendon sheath release, comprising: a handle, a knife body; The front end of the handle is rotatably connected to the blade body; The upper part of the blade is provided with a covering end, the lower part is provided with a tendon end, and the middle part of the rear end is provided with a connecting rod for rotationally connecting to the handle; the front end of the tendon end is spindle-shaped, and the side away from the blade body is provided with a fitting surface; the fitting surface is provided as an inwardly concave curved surface; Furthermore, the length of the covering end is shorter than the tendon end, and the widths of the covering end and the tendon end are greater than the thickness of the blade body; Furthermore, the blade edge portion of the blade body is configured as a relatively rounded and gentle arc, and as the blade edge extends toward the tendon end, the arc gradually becomes sharper and the radius of curvature decreases; Furthermore, one end of the connecting rod is rotatably connected to the handle, and the other end is provided with a limit head; limit keys are symmetrically provided on the upper and lower sides of the limit head, and a spring is provided near one end of the connecting rod; Furthermore, a pressing block is sleeved on the outside of the limit head; an adjusting gear is provided at one end of the pressing block, and limit grooves are symmetrically provided on both sides of the inside to be slidably connected to the limit keys; Furthermore, the pressing block is fixedly connected to a spring on an end surface close to the adjusting gear; Furthermore, the handle is provided with an anti-slip coating on the outside, a storage slot is provided in the middle, a connector is provided at the front end, a connecting hole is provided in the middle of the connector for rotating the connecting rod, and a limiting gear is provided at the outer end of the connecting hole; Furthermore, the front end of the storage slot is connected to the head and is divided into an upper and lower through-set arrangement, and the rear end passes through the bottom of the handle.

[0004] The beneficial effects of the present invention are: The present invention provides a fusiform-shaped front end of the tendon end at the lower portion of the blade, and a concave fitting surface on the side away from the blade. During tenothenolysis surgery, the fitting surface can closely fit the tendon surface, effectively avoiding the situation in which a traditional scalpel, which has difficulty in closely fitting the tendon, may accidentally cut the tendon due to a slight deviation during the operation. This greatly reduces surgical risks and the probability of serious complications such as postoperative tendon dysfunction. At the same time, by rotating the connecting head at the front end of the handle to connect the blade, the doctor can flexibly adjust the blade angle in real time according to the complex and changeable distribution position and direction of the human tendon sheath during the operation, so that the doctor can adjust the blade to the optimal operating state when facing complex anatomical structures, significantly improving the accuracy and smoothness of the surgical operation and enhancing the surgical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0006] Figure 1 The figure is a schematic diagram of the overall structure of a surgical knife assembly specially used for tendon sheath release; Figure 2 A schematic diagram of the handle structure of a scalpel assembly specifically for tendon sheath release; Figure 3 The present invention is a schematic diagram of a connecting rod structure of a scalpel assembly specially used for tendon sheath release; Figure 4 This is a schematic diagram of the pressing block structure of a scalpel assembly specifically for tendon sheath release; Figure 5The present invention is a front view of a blade body of a surgical knife assembly specially used for tenothenolysis; Figure 6 The present invention is a front view of a blade body of a surgical knife assembly specially used for tenothenolysis; In the accompanying drawings, the components represented by the reference numerals are as follows: 1-handle, 2-anti-slip coating, 3-connecting head, 4-connecting hole, 5-limiting gear, 6-connecting rod, 7-limiting head, 8-limiting key, 9-spring, 10-limiting slot, 11-pressing block, 12-adjusting gear, 13-knife body, 14-covering end, 15-tendon end, 16-fitting surface, 17-storage slot. DETAILED DESCRIPTION

[0007] The present invention discloses a surgical knife assembly specially used for tendon sheath release, comprising: a handle 1 and a blade body 13; the front end of the handle 1 is rotatably connected to the blade body 13; a covering end 14 is provided on the upper part of the blade body 13, a tendon end 15 is provided on the lower part, and a connecting rod 6 is provided at the middle part of the rear end to be rotatably connected to the handle 1; the front end of the tendon end 15 is spindle-shaped, and a fitting surface 16 is provided on the side away from the blade body 13; the fitting surface 16 is configured as a concave curved surface; in a tendon sheath release operation, the fitting surface 16 can closely fit the surface of the tendon, effectively avoiding the situation in which a traditional surgical knife is difficult to closely fit the tendon and accidentally cuts the tendon due to a slight deviation during operation, thereby greatly reducing the risk of surgery and the probability of serious complications such as postoperative tendon dysfunction.

[0008] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0009] Example 1 like Figure 1-6 As shown, the front end of the handle 1 is rotatably connected to the blade body 13; The upper part of the blade body 13 is provided with a covering end 14, the lower part is provided with a tendon end 15, and the middle part of the rear end is provided with a connecting rod 6 for rotatably connecting to the handle 1; the front end of the tendon end 15 is spindle-shaped, and the side away from the blade body 13 is provided with a fitting surface 16; the fitting surface 16 is provided as a concave curved surface; The length of the covering end 14 is smaller than the tendon end 15, and the widths of the covering end 14 and the tendon end 15 are greater than the thickness of the blade body 13; The cutting edge of the blade 13 is configured as a relatively smooth and gentle arc. As the cutting edge extends toward the tendon end 15, the arc gradually becomes sharper and the radius of curvature decreases. One end of the connecting rod 6 is rotatably connected to the handle 1, and the other end is provided with a limit head 7; limit keys 8 are symmetrically provided on the upper and lower sides of the limit head 7, and a spring 9 is provided near one end of the connecting rod 6; The outer portion of the limit head 7 is provided with a pressing block 11; an adjusting gear 12 is provided at one end of the pressing block 11, and limit grooves 10 are symmetrically provided on both sides of the inner portion for sliding connection with the limit key 8; The end surface of the pressing block 11 close to the adjusting gear 12 is fixedly connected to the spring 9; The handle 1 is provided with an anti-slip coating 2 on the outside and a storage slot 17 in the middle; a connector 3 is provided at the front end; a connecting hole 4 is provided in the middle of the connector 3 for rotatably connecting to a connecting rod 6; a limit gear 5 is provided at the outer end of the connecting hole 4; The front end connecting head 3 of the receiving slot 17 is vertically penetrated, and the rear end penetrates the bottom of the handle 1; In this embodiment, when the angle of the blade body 13 needs to be adjusted, the pressing block 11 at the outer end is pressed to drive the adjusting gear 12 to slide inward along the limit head 7 and the limit key 8. At this time, the spring 9 is compressed, and the adjusting gear 12 is disengaged from the limit gear 5. At this time, the blade body 13 can be rotated to adjust the angle. After adjusting to the appropriate angle, the pressing block 11 is released. Under the elastic reset action of the spring 9, the pressing block 11 is pushed outward, so that the adjusting gear 12 is re-engaged with the limit gear 5, and the blade body 13 is locked at the current angle. In this embodiment, since there is no transmission requirement between the adjusting gear 12 and the limiting gear 5, in order to prevent the adjusting gear 12 from getting stuck during the actual adjustment process, the following optimization can be performed: First, the gear tooth profile was optimized, changing from the traditional involute tooth profile to a 15° trapezoidal tooth profile with a tooth top width of 0.3mm and a tooth root width of 0.5mm. This creates a wedge-shaped guide during meshing, reducing the risk of radial seizure. The tooth surface roughness was also reduced, lowering the micro-friction coefficient. A DLC (diamond-like carbon) film was applied to the gears to keep the dynamic friction coefficient below 0.08. Secondly, the meshing tolerance is optimized, with the clearance on the meshing side of the gear set to 0.02mm and the clearance on the non-meshing side set to 0.05mm, which not only ensures the locking stiffness but also reduces the disengagement resistance. Finally, by spraying epoxy coating on the surface of the limit gear 5, the lubricant is released at a certain pressure to achieve dynamic lubrication; In this embodiment, the above data are hypothetical data, and the actual size and parameters are set according to actual needs.

[0010] Example 2 In this embodiment, the blade body 13 is made of titanium alloy material in actual manufacturing, which has good biocompatibility and good fatigue resistance. The total length is set to 120 mm, which can adapt to deep tendon sheath operations. The thickness is 2 mm, which has good flexibility while ensuring rigidity. The widest point in the middle is set to 8 mm, and gradually narrows to 5 mm at both ends. The tendon end 15 is made of a titanium alloy base material with a high wear resistance and low friction coefficient coating. The length is set to 25mm. The maximum width of the front end of the fusiform is 4.5mm, narrowing to 1.8mm to avoid damage to deep tissues. The curvature of the fitting surface 16 is set to R8mm to match the natural curvature of the human tendon. The covering end 14 is made of a titanium alloy base material and a layer with a high visible light reflectivity. The layer with a high visible light reflectivity can enhance the recognition of the surgical field during surgery. The length is set to 18 mm, which is shorter than the tendon end 15 to form a cutting gradient. In this embodiment, the blade is relatively small in size, taking into account the actual size. Therefore, in order to ensure the stability of the connection and the convenience of adjusting the angle in actual manufacturing and use, the size of the handle portion can be increased, thereby increasing the volume of the pressing block portion, which not only ensures the structural strength of the device but also improves the convenience of operation. In this embodiment, tendon ends 15 of various specifications can be provided to adapt to tendon curvatures in different anatomical parts.

[0011] Example 3 This embodiment provides a preferred connection method between the covering end 14 and the tendon end 15 and the blade body 13; In this embodiment, since the front of the covering end 14 and the tendon end 15 blocks the cutting edge of the blade 13, the covering end 14 and the tendon end 15 can be respectively set to be slidably connected to the upper and lower surfaces of the blade body 13. In actual use, when facing congenital tendon sheath stenosis or scar contracture after burns, it is difficult to directly insert the device to perform cutting in the tendon sheath. By sliding the covering ends 14 and tendon ends 15 on both sides backward to expose the cutting edge of the blade, the tendon sheath can be slid and cut, which can improve the applicability of the device.

[0012] In summary, the present invention provides a fusiform front end of the tendon end 15 at the lower portion of the blade body 13, and provides a concavely curved fitting surface 16 on a side away from the blade body 13. During tenolysis surgery, the fitting surface 16 can closely fit the tendon surface, effectively avoiding the situation in which a traditional scalpel, which is difficult to closely fit the tendon, may accidentally cut the tendon due to a slight deviation during the operation. This greatly reduces surgical risks and the probability of serious complications such as postoperative tendon dysfunction. At the same time, by rotating the connecting head 3 at the front end of the handle 1, the doctor can flexibly adjust the angle of the blade 13 in real time according to the complex and changeable distribution position and direction of the human tendon sheath during the operation, so that the doctor can adjust the blade 13 to the optimal operating state when facing complex anatomical structures, significantly improving the accuracy and fluency of the surgical operation and enhancing the surgical effect.

[0013] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the invention to only the specific implementation methods described.

Claims

1. A surgical knife assembly for tenolysis, characterized in that: include: Grip, knife body; The front end of the handle is rotatably connected to the blade body; The upper part of the knife body is provided with a covering end, the lower part is provided with a tendon end, and the middle part of the rear end is provided with a connecting rod for rotationally connecting to a handle; the front end of the tendon end is spindle-shaped, and a fitting surface is provided on the side away from the knife body; the fitting surface is provided as an inwardly concave curved surface.

2. A surgical knife assembly for tenolysis according to claim 1, characterized in that: The length of the covering end is shorter than the tendon end, and the widths of the covering end and the tendon end are greater than the thickness of the blade body.

3. A surgical knife assembly for tenolysis according to claim 1, characterized in that: The cutting edge of the blade body is configured as a relatively smooth and gentle arc. As the cutting edge extends toward the tendon end, the arc gradually becomes sharper and the radius of curvature decreases.

4. A surgical knife assembly for tenolysis according to claim 1, characterized in that: One end of the connecting rod is rotatably connected to the handle, and the other end is provided with a limit head; limit keys are symmetrically provided on the upper and lower sides of the limit head, and a spring is provided near one end of the connecting rod.

5. A surgical knife assembly for tenolysis according to claim 4, characterized in that: A pressing block is sleeved on the outside of the limit head; an adjusting gear is provided at one end of the pressing block, and limit grooves are symmetrically provided on both sides of the inside for sliding connection with limit keys.

6. A surgical knife assembly for tenolysis according to claim 5, characterized in that: The pressing block is fixedly connected to a spring on an end surface close to the adjusting gear.

7. A surgical knife assembly for tenolysis according to claim 1, characterized in that: The outside of the handle is provided with an anti-slip coating, and a storage groove is provided in the middle; a connecting head is provided at the front end; a connecting hole is provided in the middle of the connecting head for rotating the connecting rod; and a limiting gear is provided at the outer end of the connecting hole.

8. A surgical knife assembly for tenolysis according to claim 7, characterized in that: The front end of the storage slot is connected to the head and is divided into an upper and lower through-set, and the rear end passes through the bottom of the handle.

Images