Plasma debridement knife

Abstract

The plasma debridement knife comprises a knife head, a knife rod, a handle, a connector, an instillation tube and a suction tube, the knife head comprises an insulation head, a suction hole, a second electrode wire, an instillation hole, a first electrode wire and a return electrode, the suction hole, the second electrode wire, the instillation hole, the first electrode wire and the return electrode are arranged on the insulation head and sequentially arranged from top to bottom, and the return electrode is connected with a first wire arranged in the handle. The first electrode wire and the second electrode wire extend out or retract back along the insulating head under the action of the telescopic driving assembly, the first electrode wire is connected with a first connecting pipe, the second electrode wire is connected with a second connecting pipe, and the first connecting pipe and the second connecting pipe are respectively in alternate contact with an electric energy contact piece arranged in the handle. According to the debridement knife, through the two telescopic electrode wires with different widths, the debridement knife can conduct large-range cleaning work, deeper necrotic tissue can be carefully cleaned, unnecessary tissue damage can be avoided while efficient debridement is achieved, and the debridement effect is good.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a plasma debridement knife. Background Technology

[0002] Debridement is a basic surgical procedure. The quality of the initial wound treatment plays a decisive role in wound healing and the restoration of the function and morphology of the injured tissue. During debridement, it is necessary to thoroughly remove the tissue that has lost its vitality, while trying to protect and preserve the surviving tissue as much as possible. This is the only way to avoid wound infection, promote healing, and preserve function.

[0003] Traditional debridement methods include surgical debridement, biochemical debridement, and mechanical debridement. Surgical debridement uses surgical methods to remove necrotic tissue from the wound, resulting in a relatively thorough debridement, but it may cause bleeding, damage to normal tissue, and pain that patients may not tolerate. Biochemical debridement uses water-activated dressings and enzyme preparations applied to the wound to remove contaminated tissue, but it requires repeated and regular debridement over a long period, often necessitating consideration of skin protection measures, and some enzyme preparations are expensive. Mechanical debridement mainly uses hydrotherapy irrigation, which cleans the wound surface with saline or cleaning agents using vortex or rinsing methods. It is simple and convenient to operate, but low-pressure irrigation is less effective, and high pressure may damage living tissue.

[0004] Surgical instruments utilizing low-temperature plasma principles for wound cleaning already exist. Compared to traditional debridement methods, they offer higher efficiency and more thorough cleaning. Furthermore, because the temperature of low-temperature plasma is between 40°C and 70°C, it causes minimal thermal damage to human tissue. The plasma layer also possesses a high oxidizing effect, killing bacteria on the wound surface and providing effective sterilization for wounds in areas where medication is difficult to reach. However, there is still room for improvement. For example, the depth of tissue necrosis within a wound is often inconsistent, but current plasma debridement instruments typically use one or more wide electrode wires as active electrodes. This inevitably leads to the scraping away of healthy tissue at shallower necrotic areas when cleaning deeper necrotic tissue, causing unnecessary tissue damage. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a plasma debridement knife.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a plasma debridement knife, including a blade head, a blade handle, a handle, a connector, an infusion tube, and a suction tube, wherein the blade head and the handle are located at the two ends of the blade handle respectively;

[0007] The blade includes an insulating head, a suction hole arranged from top to bottom on the insulating head, a second electrode wire, a drip hole, a first electrode wire, and a return electrode. The return electrode is connected to a first wire arranged inside the handle. The drip tube extends from the rear end of the handle and communicates with the drip hole. The suction tube extends from the rear end of the handle and communicates with the suction hole.

[0008] The first electrode wire and the second electrode wire extend or retract along the insulating head through the action of the telescopic drive assembly. The widths of the first electrode wire and the second electrode wire are not the same. The first electrode wire is connected to a first connecting tube, and the second electrode wire is connected to a second connecting tube. The first connecting tube and the second connecting tube are in alternating contact with the power contact piece provided in the handle. The power contact piece is connected to a second wire. The first wire and the second wire are respectively connected to the connector.

[0009] Furthermore, the telescopic drive assembly includes a rotating shaft that extends laterally through the handle housing, adjustment discs respectively disposed at both ends of the rotating shaft and located outside the handle housing, an adjustment handle disposed on the adjustment discs, a gear disposed on the rotating shaft, and racks respectively disposed on the first connecting pipe and the second connecting pipe, the two racks being located above and below the gear respectively, and the racks meshing with the gear.

[0010] Furthermore, a locking post is provided on the side of the adjustment disc opposite to the handle housing, and locking grooves are provided on both sides of the handle housing to engage with the locking post.

[0011] Furthermore, the slot has an arc-shaped structure, and anti-retraction mechanisms are provided at both ends of the arc-shaped structure, so that the locking pin can be fixed at the two end positions of the slot without external force.

[0012] Furthermore, the return electrode is sheet-shaped, with its front end curving upwards and facing the first electrode wire.

[0013] Furthermore, the width of the first electrode wire is greater than the width of the second electrode wire.

[0014] Furthermore, the width of the suction hole is greater than the width of the first electrode wire or the second electrode wire.

[0015] Furthermore, the exterior of the first connecting pipe and the second connecting pipe are respectively provided with an insulating layer.

[0016] This invention offers the following advantages: The plasma debridement scalpel provided by this invention has a reliable structure and excellent performance. Using two retractable electrode wires of unequal width, the wider electrode wire extends to clean necrotic tissue within the wound over a large area. For deeper necrotic tissue, the narrower electrode wire can be extended (while the wider wire retracts) to perform the remaining cleaning. Therefore, this debridement scalpel can perform both large-scale cleaning and meticulous cleaning of deeper necrotic tissue, achieving efficient debridement while avoiding unnecessary tissue damage, resulting in excellent debridement effects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is an enlarged schematic diagram of the cutter head structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the handle in this utility model;

[0020] Figure 4 This is a schematic diagram of the handle shell structure in this utility model;

[0021] Figures 1 to 4 The reference numerals in the accompanying drawings are as follows: 1-blade head, 2-blade bar, 3-handle, 4-connector, 5-drip tube, 6-suction tube, 10-insulating head, 11-suction hole, 12-second electrode wire, 13-drip hole, 14-first electrode wire, 15-return electrode, 16-first wire, 17-first connecting tube, 18-second connecting tube, 30-rotating shaft, 31-adjusting disc, 32-adjusting handle, 33-gear, 34-rack, 35-clamping post, 36-slot. Detailed Implementation

[0022] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0023] like Figures 1 to 4 As shown, a plasma debridement knife includes a blade head 1, a blade handle 2, a handle 3, a connector 4, an infusion tube 5, and a suction tube 6. The blade head 1 and the handle are located at both ends of the blade handle 2, respectively.

[0024] The cutting head 1 includes an insulating head 10, a suction hole 11, a second electrode wire 12, a drip hole 13, a first electrode wire 14, and a return electrode 15 arranged sequentially from top to bottom on the insulating head 10. The return electrode 15 is connected to a first lead wire 16 disposed within the handle 3 to form a current circuit. The return electrode 15 is plate-shaped, with its front end curving upwards and facing the first electrode wire 14. A drip tube 5 extends from the rear end of the handle 3 and communicates with the drip hole 13, used to drip physiological saline or other solutions onto the surgical site, helping to keep the tissue moist and reduce thermal damage. Furthermore, the drip hole 13 can also be located between the return electrode 15 and the first electrode wire 14, near the return electrode 15, and its shape is not limited to a circular hole; it can also be a narrow groove. A suction tube 6 extends from the rear end of the handle 3 and communicates with the suction hole 11, used to remove smoke, blood, or other liquids generated during surgery, maintaining a clear surgical field. The width of the suction hole 11 is greater than the width of the first electrode wire 14 or the second electrode wire 12.

[0025] The first electrode wire 14 and the second electrode wire 12 extend or retract along the insulating head 10 through the action of the telescopic drive assembly. The widths of the first electrode wire 14 and the second electrode wire 12 are not the same; preferably, the width of the first electrode wire 14 is greater than the width of the second electrode wire 12. The first electrode wire 14 is connected to a first connecting tube 17, and the second electrode wire 12 is connected to a second connecting tube 18. The first connecting tube 17 and the second connecting tube 18 are in alternating contact with the power contact piece 7 disposed in the handle 3. The power contact piece 7 is connected to a second wire 8. The first wire 16 and the second wire 8 are respectively connected to the connector 4. Both the first connecting tube 17 and the second connecting tube 18 are made of steel pipe, and an insulating layer is provided on the outside of the first connecting tube 17 and the second connecting tube 18 to ensure insulation between them. The telescopic drive assembly drives two electrode wires of different widths to extend and retract. When cleaning necrotic tissue in a large area of ​​the wound, the wider electrode wire extends to clean the tissue. For the remaining, deeper necrotic tissue, the narrower electrode wire can be extended and retracted to clean the remaining tissue.

[0026] Specifically, the telescopic drive assembly includes a rotating shaft 30 extending laterally within the handle 3 housing, adjustment discs 31 positioned at both ends of the rotating shaft 30 and located outside the handle 3 housing, an adjustment handle 32 on the adjustment discs 31, a gear 33 on the rotating shaft 30, and racks 34 on the first connecting tube 17 and the second connecting tube 18, respectively. The two racks 34 are located above and below the gear 33, and mesh with the gear 33. The rotating shaft 30 serves as the axis for driving the rotation of the gear 33, transmitting external rotational force to the gear 33. The adjustment discs 31 provide the doctor with an operating handle 3, allowing the doctor to drive the rotation of the rotating shaft 30 and the gear 33 by rotating the adjustment discs 31. By rotating the adjustment handle 32, the doctor can easily control the rotation direction and speed of the adjustment discs 31. The racks 34 mesh with the gears 33; when the gears 33 rotate, the racks 34 move along the tooth grooves of the gears 33, thereby extending or retracting the connecting tubes and electrode wires.

[0027] A locking pin is provided on the side of the adjustment disc 31 opposite to the handle 3 housing. The handle 3 housing has locking grooves 36 on both sides that engage with the locking pin. The locking grooves 36 are arc-shaped, and anti-retraction mechanisms are provided at both ends of the arc-shaped structure, so that the locking pin can be fixed at the two ends of the locking groove 36 without external force.

[0028] The working process of this plasma debridement knife is as follows:

[0029] In the initial state, the locking pin is inserted into the rear end of the locking slot 36. At this time, the first electrode wire 14 extends from the front end of the insulating head 10, and the end of the first steel tube contacts the first power contact piece 7. At the same time, the second electrode wire 12 retracts into the insulating head 10, and the end of the second steel tube separates from the second power contact piece 7. That is, no current passes through the second electrode wire 12. Connect the connector 4 to the plasma host, and saline solution flows out through the drip hole 13. A large amount of plasma is generated at the first electrode to clean the wound over a wide area. After the wound has been cleaned, if there is still some deep necrotic tissue that has not been cleaned, since the area of ​​necrotic tissue to be cleaned is small, in order to avoid damaging the normal tissue, the adjustment handle 32 can be moved forward until the front end of the locking pin is engaged in the locking slot 36. The gear 33 rotates counterclockwise, driving the lower rack 34 to move backward and simultaneously driving the upper rack 34 to move forward. At this time, the first connecting tube 17 moves backward, driving the first electrode wire 14 to retract into the insulating head 10 and the end of the first steel tube to separate from the first power contact piece 7. The second connecting tube 18 moves forward, pushing out the second electrode wire 12 and the end of the second steel tube to contact the second power contact piece 7. At this time, after being energized, plasma can be generated on the second electrode wire 12 to clean the remaining deep necrotic tissue. Since the second electrode wire 12 is narrow, it will basically not damage the surrounding normal tissue.

[0030] The above are merely preferred embodiments of the present utility model and are 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 shall be included within the protection scope of the present utility model.

Claims

1. A plasma debrider comprising: It includes a blade (1), a blade (2), a handle (3), a connector (4), a drip tube (5), and a suction tube (6), wherein the blade (1) and the handle are located at the two ends of the blade (2); The blade (1) includes an insulating head (10), a suction hole (11), a second electrode wire (12), a drip hole (13), a first electrode wire (14), and a return electrode (15) arranged sequentially from top to bottom on the insulating head (10). The return electrode (15) is connected to a first wire (16) arranged in the handle (3). The drip tube (5) extends from the rear end of the handle (3) and communicates with the drip hole (13). The suction tube (6) extends from the rear end of the handle (3) and communicates with the suction hole (11). The first electrode wire (14) and the second electrode wire (12) extend or retract along the insulating head (10) by means of the telescopic drive assembly. The width of the first electrode wire (14) and the width of the second electrode wire (12) are not the same. The first electrode wire (14) is connected to a first connecting tube (17), and the second electrode wire (12) is connected to a second connecting tube (18). The first connecting tube (17) and the second connecting tube (18) are in alternating contact with the power contact piece (7) provided in the handle (3). The power contact piece (7) is connected to a second wire (8). The first wire (16) and the second wire (8) are respectively connected to the connector (4).

2. The plasma debrider of claim 1 wherein, The telescopic drive assembly includes a rotating shaft (30) that extends laterally through the handle (3) housing, an adjustment disc (31) that is respectively disposed at both ends of the rotating shaft (30) and located outside the handle (3) housing, an adjustment handle (32) disposed on the adjustment disc (31), a gear (33) disposed on the rotating shaft (30), and racks (34) disposed on the first connecting pipe (17) and the second connecting pipe (18), respectively. The two racks (34) are respectively located above and below the gear (33), and the racks (34) mesh with the gear (33).

3. The plasma debrider of claim 2 wherein, The adjustment disc (31) is provided with a locking post on the side opposite to the handle (3) housing, and the handle (3) housing is provided with a locking groove (36) on both sides for engaging with the locking post.

4. The plasma debrider of claim 3 wherein, The slot (36) has an arc-shaped structure, and anti-retraction mechanisms are provided at both ends of the arc-shaped structure, so that the pin can be fixed at the two end positions of the slot (36) without external force.

5. The plasma debrider of claim 1 wherein, The return electrode (15) is sheet-shaped, with its front end curving upwards and facing the first electrode wire (14).

6. The plasma debrider of claim 1 wherein, The width of the first electrode wire (14) is greater than the width of the second electrode wire (12).

7. The plasma debrider of claim 1 wherein, The width of the suction hole (11) is greater than the width of the first electrode wire (14) or the second electrode wire (12).

8. The plasma debrider of claim 1 wherein, The first connecting pipe (17) and the second connecting pipe (18) are respectively provided with an insulating layer on their exterior.

Images