A shaving head for minimally invasive surgery

Abstract

This utility model discloses a minimally invasive surgical shaving head, relating to the field of medical device technology. To address the problems of easy clogging of the shaving tube during the removal of diseased tissue and the increased risk of accidental injury during pressure cutting in existing technologies, the following technical solution is proposed: This utility model includes an inner shaving seat, an outer shaving seat, an outer shaving tube, an inner shaving tube, a cutting window, and a cutting edge. A cutting window is provided on the side of the end of the outer shaving tube, consisting of two waist-shaped holes arranged in an "X" shape. The outer shaving seat is fixedly located at the end of the outer shaving tube away from the cutting window. The inner shaving tube is located inside the outer shaving tube, and a cutting edge is provided at the position corresponding to the cutting window on the inner shaving tube. The inner shaving seat is fixedly located on the inner shaving tube away from the cutting edge. This utility model, through the cooperation of the "X"-shaped cutting window and the inclined blade, uses a segmented cutting stroke to preferentially aspirate the cut tissue fragments under continuous negative pressure, effectively avoiding the problem of excessive accumulation of loose tissue in the inner shaving tube cavity, thus preventing clogging.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a shaving head for minimally invasive surgery. Background Technology

[0002] A dowager's hump is an abnormally protruding mass located at the junction of the neck and chest, mainly composed of loose connective tissue, blood vessels, and fat. It not only affects physical appearance but also exacerbates neck pain and hinders the recovery from cervical spondylosis. Accessory breasts, as an abnormal development of breast tissue, are often asymptomatic, but surgical intervention is necessary when accompanied by pain, masses, or significant impact on appearance. Currently, minimally invasive resection is commonly performed clinically using a shaving system. Its core component, the shaving blade, consists of coaxially arranged inner and outer blade tubes. The tail end of the inner blade tube is connected to a negative pressure system, and tissue cutting is achieved through a reciprocating rotating serrated blade edge combined with a large-sized window (as shown in CN117530752A).

[0003] However, existing shaving blade designs have significant drawbacks: Firstly, due to the loose structure and high viscosity of the tissue in the dowager's hump and accessory breast tissue, the large cutting window combined with the high-speed rotating serrated blade can easily lead to excessive accumulation of tissue debris within the inner blade lumen, causing blockage and interrupting the surgery. Secondly, the necessary pressure applied to the surgical site during the procedure makes the large cutting window more prone to sucking up excessive normal tissue, especially when the window spans the circumference of the blade head; the lack of selective suction significantly increases the risk of accidental injury. These problems severely restrict surgical efficiency and safety. Utility Model Content

[0004] The purpose of this invention is to provide a shaving head for minimally invasive surgery to solve the problems of easy blockage of the blade tube when removing diseased tissue and the increased risk of accidental injury when pressing and cutting in the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A minimally invasive surgical shaving head includes an inner blade holder, an outer blade holder, an outer blade tube, an inner blade tube, a cutting window, and a cutting edge. The outer blade tube has a cutting window on its side end, which consists of two waist-shaped holes arranged in an "X" shape. The outer blade holder is fixedly located at the end of the outer blade tube away from the cutting window. The inner blade tube is located inside the outer blade tube. The inner blade is located at the position corresponding to the cutting window on the inner blade tube. The inner blade holder is fixedly located on the inner blade tube away from the cutting edge.

[0007] Furthermore, the cutting window and the cutting edge are closely fitted together, and a cutting action is formed between them.

[0008] Furthermore, the cutting window edge is provided with a cutting edge that slopes outward from the inner surface.

[0009] Furthermore, the cutting edge is a waist-shaped hole, and the edge of the cutting edge is provided with a cutting edge that slopes inward from the outer surface.

[0010] Furthermore, the cutting window and the cutting edge are designed with an angle difference during cutting.

[0011] Furthermore, it also includes a water inlet hole that penetrates the outer tool holder and the outer tool tube.

[0012] Furthermore, a locking groove is provided at the end of the inner tool holder away from the cutting edge.

[0013] This utility model has the following beneficial effects:

[0014] This invention utilizes an "X"-shaped cutting window in conjunction with an inclined blade. Based on a segmented cutting stroke and a small-volume suction mechanism, the segmented cutting stroke allows for the preferential suction of severed tissue fragments under continuous negative pressure, while uncut portions are stretched and cut to form a finer tissue flow. This effectively avoids the problem of excessive accumulation of loose tissue in the inner blade lumen, which could lead to blockage. Furthermore, the "X"-shaped cutting window ensures that when the blade operates close to the boundary between the subcutaneous fat layer and the dermis / muscle layer, it can only suction target tissue to a limited depth. Even with intraoperative pressure, the amount of adjacent normal tissue suctioned by the window is strictly limited, thus avoiding dermal tearing or accidental muscle layer cutting caused by excessive suction in traditional large-window structures, significantly reducing the risk of surgical complications. Attached Figure Description

[0015] Figure 1 A front view of a planer head used in minimally invasive surgery;

[0016] Figure 2 Rear view of a shaving head used in minimally invasive surgery;

[0017] Figure 3 A cross-sectional view of a planer head used in minimally invasive surgery;

[0018] Figure 4 A schematic diagram of the cutting window structure of a planer head for minimally invasive surgery;

[0019] Figure 5 A schematic diagram of the internal blade tube structure of a minimally invasive surgical planer head;

[0020] Figure 6 This is a schematic diagram of the outer blade of a planer head used in minimally invasive surgery.

[0021] Figures 1 to 6 The reference numerals in the attached drawings are respectively: 1-inner tool holder, 2-outer tool holder, 3-outer tool tube, 4-inner tool tube, 5-cutting window, 6-cutting edge, 7-water inlet hole. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Please refer to Figure 1-3 :

[0024] A minimally invasive surgical shaving head includes an inner blade holder 1, an outer blade holder 2, an outer blade tube 3, an inner blade tube 4, a cutting window 5, and a cutting edge 6. The outer blade tube 3 has a cutting window 5 on its side end. The outer blade holder 2 is fixedly located at the end of the outer blade tube 3 away from the cutting window 5. The inner blade tube 4 is located inside the outer blade tube 3. The inner blade tube 4 has a cutting edge 6 at a position corresponding to the cutting window 5. The inner blade holder 1 is fixedly located on the inner blade tube 4 away from the cutting edge 6. The inner blade holder 1 and the outer blade holder 2 fix the inner blade tube 4 and the outer blade tube 3 respectively. They are connected to the power handle through a snap-fit ​​groove to ensure that the motor torque is efficiently transmitted to the inner blade tube 4 and achieve stable cutting.

[0025] Furthermore, the end of the inner blade holder 1 away from the cutting edge 6 is provided with a locking groove. The groove at the end of the inner blade holder 1 is adapted to a standard handle, such as the patent CN219962986U, which improves the compatibility of the blade with different surgical equipment.

[0026] In addition, the cutting window 5 and the cutting edge 6 are closely fitted together, and the relative movement between the two creates a cutting action, thereby cutting the inhaled tissue.

[0027] As attached Figure 4 As shown, the cutting window 5 consists of two waist-shaped holes arranged in an "X" shape. The edge of the cutting window 5 has a cutting edge that slopes outward from the inner surface. The cutting blade 6 is a waist-shaped hole, and the edge of the cutting blade 6 has a cutting edge that slopes inward from the outer surface. The two cutting windows 5 are arranged in a cross pattern with an included angle of 60-90°. This expands the tissue aspiration range while limiting the volume of a single aspiration through the cross structure to prevent excessive tissue from clogging the inner blade tube. By limiting the amount of aspiration per aspiration, when cutting critical tissues such as subcutaneous fat, it avoids the accidental aspiration of deep muscles or the dermis due to excessive negative pressure, thus improving surgical safety.

[0028] Secondly, the cutting window 5 and the cutting edge 6 are designed with an angle difference during cutting. The edge of the cutting edge 6 is inclined along the axial direction, forming a complementary angle difference with the cutting edge of the cutting window 5, thereby generating a progressive shearing force, reducing cutting resistance, and realizing segmented cutting. When the inner blade tube 4 rotates, the long axis of the cutting edge 6 is misaligned with the cutting window 5, so that the cutting process is carried out in segments. The time difference of segmented cutting allows the negative pressure system to adsorb the cut tissue debris in stages, avoiding large pieces of tissue from clogging at the same time.

[0029] It also includes a water inlet 7, which penetrates the outer blade holder 2 and the outer blade tube 3. Physiological saline is injected through the water inlet 7 of the outer blade holder 2 to rinse the cutting area, maintain a clear field of vision, and cool the blade tip to prevent high temperature burns to the tissue.

[0030] The specific workflow of this utility model is as follows:

[0031] During surgery, the blade is connected to the power handle by engaging the inner blade holder 1 in the locking groove. After startup:

[0032] (1) The negative pressure system of the power handle generates negative pressure through the inner blade tube 1 channel, so that the target tissue is sucked in through the cutting window 5;

[0033] (2) The motor of the power handle drives the inner blade tube 4 to rotate. When the cutting edge 6 contacts the left edge of the cutting window 5, it cuts the tissue first.

[0034] (3) The cutting edge 6 contacts the right edge of the cutting window 5 to complete the cutting of the remaining tissue.

[0035] (4) The cut debris is sucked out through the inner blade tube 4, while physiological saline is used to rinse the surgical area through the water inlet 7.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shaving head for minimally invasive surgery, characterized in that, The device includes an inner tool holder (1), an outer tool holder (2), an outer tool tube (3), an inner tool tube (4), a cutting window (5), and a cutting edge (6). The outer tool tube (3) has a cutting window (5) on its side end. The cutting window (5) consists of two waist-shaped holes arranged in an "X" shape. The outer tool holder (2) is fixedly located at the end of the outer tool tube (3) away from the cutting window (5). The inner tool tube (4) is located inside the outer tool tube (3). The inner tool tube (4) has a cutting edge (6) at the position corresponding to the cutting window (5). The inner tool holder (1) is fixedly located on the inner tool tube (4) away from the cutting edge (6). The cutting window (5) is in close contact with the cutting edge (6), and a cutting action is formed between them.

2. The minimally invasive surgical shaving head according to claim 1, characterized in that, The cutting window (5) has a cutting edge that slopes outward from the inner surface.

3. The minimally invasive surgical shaving head according to claim 1, characterized in that, The cutting edge (6) is a waist-shaped hole, and the edge of the cutting edge (6) is provided with a cutting edge that is inclined inward from the outer surface.

4. The minimally invasive surgical shaving head according to claim 1, characterized in that, The cutting window (5) and the cutting edge (6) are provided with an angle difference when cutting.

5. The minimally invasive surgical shaving head according to claim 1, characterized in that, It also includes a water inlet (7), which penetrates the outer knife holder (2) and the outer knife tube (3).

6. The minimally invasive surgical shaving head according to claim 1, characterized in that, The inner tool holder (1) is provided with a snap-fit ​​groove at the end away from the cutting edge (6).

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