Plasma knife with replaceable knife head

Abstract

The utility model relates to a plasma knife with a replaceable knife head, which comprises a handle part, an electrode part, a first connecting piece arranged on the handle part, a second connecting piece arranged on the electrode part, a liquid injection tube and a suction tube, and the first connecting piece is matched with the second connecting piece. A first channel, a second channel and a third channel are arranged in the second connecting piece, one end of the first channel, one end of the second channel and one end of the third channel extend to the outer surface of the second connecting piece, and the second channel and the third channel communicate with the first channel. A fourth channel penetrating through the electrode part is arranged in the electrode part, the liquid injection tube sequentially penetrates through the second channel and the first channel and then enters the fourth channel, and the suction tube sequentially penetrates through the third channel and the first channel and then enters the fourth channel. The liquid injection tube and the suction tube are arranged on the electrode part, so that the cutter head can be conveniently and quickly replaced.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a plasma knife with a replaceable blade. Background Technology

[0002] Currently, plasma scalpels are commonly used in surgical procedures to cut human tissue. The tip of the plasma scalpel is equipped with electrodes that convert electrical energy into heat energy. A thin plasma layer is formed between the electrodes and the human tissue. Ions in the plasma layer are accelerated by the electric field and transfer energy to the tissue. At low temperatures, the molecular bonds between cells are broken, causing the cells in the human tissue to decompose into carbohydrates and oxides, thus achieving the effect of cutting human tissue.

[0003] Existing plasma scalpels often integrate blade replacement and aspiration / injection functions, allowing for the replacement of different blade models when facing different surgical sites during surgery, and the continuous injection of physiological saline into the surgical site during the operation.

[0004] However, in existing plasma knives, the integrated mechanism of the plasma knife tip replacement device and the suction and injection tube is relatively complex, which makes it inconvenient to quickly replace the tip. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a plasma knife with a replaceable blade, which facilitates quick blade replacement.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A plasma scalpel with a replaceable tip includes a handle, an electrode, a first connector on the handle, a second connector on the electrode, an injection tube, and a suction tube. The first connector mates with the second connector. The second connector has a first channel, a second channel, and a third channel, one end of each of the first, second, and third channels extending to the outer surface of the second connector. The second and third channels are respectively connected to the first channel. The electrode has a fourth channel penetrating the electrode and connected to the first channel. The injection tube passes through the second and first channels sequentially and enters the fourth channel. The suction tube passes through the third and first channels sequentially and enters the fourth channel.

[0008] Furthermore, the second channel and the third channel are disposed opposite to each other on both sides of the second connector.

[0009] Furthermore, the sidewall of the injection tube located in the fourth channel is interconnected with the sidewall of the suction tube located in the fourth channel.

[0010] Furthermore, both the injection tube and the suction tube extend to the outer surface of the electrode portion, and a sieve plate is provided at one end of the injection tube near the fourth channel.

[0011] Furthermore, the first connector includes a first connecting rod, and the second connector includes a first connecting groove that mates with the first connecting rod.

[0012] Furthermore, a second connecting rod is provided in the first connecting groove, and the first connecting rod is provided with a connecting hole that cooperates with the second connecting rod.

[0013] Furthermore, the first connecting rod is cylindrical, a limiting block is provided on the inner wall of the first connecting groove, an annular groove and a straight groove communicating with the annular groove are provided on the side wall of the first connecting rod, and the straight groove extends to the end of the first connecting rod facing the second connecting member; the limiting block enters the annular groove through the straight groove.

[0014] Furthermore, the first connecting rod is interference-fitted with the first connecting groove.

[0015] Furthermore, the fourth channel is provided with an installation tube, and both the injection tube and the suction tube located in the fourth channel are disposed in the installation tube.

[0016] Furthermore, the injection tube and the suction tube located in the fourth channel are respectively symmetrically arranged around the axis of the mounting tube.

[0017] Compared with the prior art, the advantages of this utility model are as follows: by setting a detachable first connector and a second connector, and by integrating the injection tube and the suction tube on the second connector, it is convenient to integrate the blade replacement device with the suction and injection tubes. The structure is simple and the blade can be replaced quickly. Attached Figure Description

[0018] Figure 1 This is a front view of the plasma knife with replaceable blade of this utility model;

[0019] Figure 2 yes Figure 1 Enlarged diagram of section A in the middle;

[0020] Figure 3 This is a partial cross-sectional view of the plasma knife with replaceable blade of this utility model;

[0021] Figure 4 yes Figure 3 Enlarged diagram of section B;

[0022] Figure 5This is a three-dimensional schematic diagram of the second connecting member of this utility model;

[0023] Figure 6 This is a three-dimensional schematic diagram of the first connecting member of this utility model;

[0024] Figure 7 This is a top view of the injection tube, suction tube, and installation tube of this utility model;

[0025] Figure 8 yes Figure 7 Cross-sectional view of the C-C plane;

[0026] Figure 9 yes Figure 8 Enlarged schematic diagram of section D in the middle;

[0027] Figure 10 This is a left view of the injection tube, suction tube, and installation tube of this utility model;

[0028] Figure 11 yes Figure 10 Enlarged schematic diagram of section E in the middle.

[0029] In the picture:

[0030] 1 – Handle; 2 – Electrode; 3 – First connector; 3a – First connecting rod; 3b – Connecting hole; 3c – Connecting base; 4 – Second connector; 4a – First connecting groove; 4b – Second connecting rod; 5 – Injection tube; 6 – Suction tube; 7 – Second channel; 8 – Sieve plate; 9 – Limiting block; 10 – Straight groove; 11 – Mounting tube; 12 – Injection connector; 13 – Suction connector. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figures 1 to 6 As shown, this utility model discloses a plasma scalpel with a replaceable blade for use in surgical procedures. Specifically, as... Figure 1 and Figure 2 As shown, the plasma scalpel with replaceable blade of this utility model includes a handle part 1, an electrode part 2, a first connecting member 3 disposed on the handle part 1, a second connecting member 4 disposed on the electrode part 2, a liquid injection tube 5, and a suction tube 6. The electrode part 2 is provided with an electrode for cutting human tissue. The first connecting member 3 and the second connecting member 4 cooperate in a detachable connection manner, that is, the handle part 1 and the electrode part 2 are detachably connected. The difference between this utility model and the prior art is that, as Figures 1 to 6As shown, the second connector 4 has a first channel, a second channel 7, and a third channel. One end of the first channel, one end of the second channel 7, and one end of the third channel all extend to the outer surface of the second connector 4. The electrode part 2 has a fourth channel that penetrates the electrode part 2 and is connected to the first channel. The second channel 7 and the third channel are both connected to the first channel. Therefore, when the injection tube 5 and the suction tube 6 are assembled with the second connector 4, one end of the injection tube 5 passes through the second channel 7 from the outer surface of the second connector 4, then passes through the first channel, and finally exits from the first channel and enters the fourth channel. The other end of the injection tube 5 extends out of the outer surface of the second connector 4. Similarly, one end of the suction tube 6 passes through the third channel from the outer surface of the second connector 4, then passes through the first channel, and finally exits from the first channel and enters the fourth channel. The other end of the suction tube 6 extends out of the outer surface of the second connector 4. In this replaceable-head plasma scalpel, the electrode part 2, the second connector 4, the injection tube 5, and the suction tube 6 constitute a scalpel head assembly. Several scalpel head assemblies can be provided. The difference between each scalpel head assembly lies in the different electrodes in each electrode part 2, but the shape of the second connector 4 in each scalpel head assembly is the same. Therefore, when the replaceable-head plasma scalpel of this invention needs to replace the scalpel head, the first connector 3 and the second connector 4 are separated, and then the required scalpel head assembly is taken out. The first connector 3 and the second connector 4 are then connected accordingly to complete the scalpel head replacement. After the injection tube 5 and the suction tube 6 are connected to their respective external devices, the function of providing physiological saline can be achieved simultaneously with the electrode cutting human tissue. This invention facilitates scalpel head replacement by providing a detachable first connector 3 and second connector 4; and by integrating the injection tube 5 and the suction tube 6 onto the second connector 4, it facilitates the integration of the scalpel head replacement device with the suction and injection tubes, resulting in a simple structure.

[0035] The replaceable-tip plasma knife of this utility model has many embodiments, including the form in which the first connecting member 3 and the second connecting member 4 cooperate, and the positional relationship between the injection tube 5 and the suction tube 6. The following describes in detail one embodiment of each of these features, such as the form in which the first connecting member 3 and the second connecting member 4 cooperate. This embodiment is referred to as the present embodiment. Other embodiments of these features are referred to as other embodiments, which are briefly described below.

[0036] In this embodiment, as Figure 2 and Figure 5As shown, the second channel 7 and the third channel are arranged opposite each other on both sides of the second connector 4. The end of the injection tube 5 near the second channel 7 is connected to an injection connector 12, and the end of the suction tube 6 near the third channel is connected to a suction connector 13. In use, the plasma scalpel with replaceable blade of this invention connects the injection connector 12 to the saline supply device and the suction connector 13 to the saline suction device, enabling the supply and aspiration of saline. Furthermore, by arranging the second channel 7 and the third channel opposite each other on both sides of the second connector 4, the injection connector 12 and the suction connector 13 are respectively located on both sides of the second connector 4, symmetrically arranged about the axis of the second connector 4. This facilitates connection of the injection connector 12 and the suction connector 13 to external devices, and the separate design of the injection connector 12 and the suction connector 13 prevents incorrect connection. In other embodiments, when the operating room space is small, and the saline supply device and the suction device are placed on one side of the operating table, the second channel 7 and the third channel can also be arranged close together.

[0037] In this embodiment, as Figure 2 and Figure 8 As shown, the sidewalls of the injection tube 5 and the suction tube 6 are partially connected. Specifically, the sidewall of the injection tube 5, located in the fourth channel, is connected to the sidewall of the suction tube 6, located in the fourth channel. The injection tube 5 and the suction tube 6 form a connection as shown in the diagram. Figure 8 The diagram shows a Y-shaped integrated injection and suction tube. The injection tube 5 and suction tube 6, with their sidewalls interconnected, form a single unit, facilitating their insertion into the fourth channel. In other embodiments, the fourth channel may consist of a fifth channel and a sixth channel, with their sidewalls interconnected. The fifth channel is used for the injection tube 5, and the sixth channel is used for the suction tube 6. Therefore, during the insertion of the injection tube 5 and suction tube 6 into the fourth channel, they are less prone to twisting, further facilitating their insertion.

[0038] In this embodiment, as Figures 8 to 11 As shown, both the injection tube 5 and the suction tube 6 extend to the outer surface of the electrode part 2. A sieve plate 8 is provided at the end of the injection tube 5 near the fourth channel, i.e., at the outlet of the injection tube 5. The sieve plate 8 is sprinkler-shaped, and physiological saline is sprayed out from the small washing holes of the sieve plate 8. Because the outlet of the injection tube 5 and the suction port of the suction tube 6 are close together, when the suction tube 6 draws in physiological saline, a portion of the physiological saline, along with human tissue debris, is drawn into the injection tube 5. The sieve plate 8 effectively prevents human tissue debris from being drawn into the injection tube 5, preventing blockage. In other embodiments, a one-way valve can be used instead of the sieve plate 8, and the suction tube 6 is provided with the sieve plate 8 at the end near the fourth channel.

[0039] In this embodiment, as Figure 5 and Figure 6 As shown, the first connector 3 includes a first connecting rod 3a and a connecting base 3c connected to the first connecting rod 3a. The connecting base 3c is connected to the handle part 1. The second connector 4 includes a first connecting groove 4a that mates with the first connecting rod 3a. When the handle part 1 needs to be connected to the electrode part 2, the first connecting rod 3a is inserted into the first connecting groove 4a to complete the connection between the handle part 1 and the electrode part 2. This invention achieves a detachable connection between the handle part 1 and the electrode part 2 through the provision of the first connecting rod 3a and the first connecting groove 4a. In other embodiments, the first connector 3 and the second connector 4 can be connected by magnetic attraction, using a magnetic component and a metal component to achieve a detachable connection.

[0040] However, using only the first connecting rod 3a and the first connecting groove 4a for connection, without any limiting force in the direction in which the first connecting rod 3a is inserted into the first connecting groove 4a, results in insufficient stability of the connection between the first connecting rod 3a and the first connecting groove 4a. Therefore, in this embodiment, as... Figure 5 and Figure 6 As shown, a limiting block 9 is provided to prevent the first connecting rod 3a from easily dislodging from the first connecting groove 4a. Specifically, both the first connecting rod 3a and the first connecting groove 4a are cylindrical. A limiting block 9 is provided on the inner wall of the first connecting groove 4a, and an annular groove and a straight groove 10 communicating with the annular groove are provided on the side wall of the first connecting rod 3a. The straight groove 10 extends to the end of the first connecting rod 3a facing the second connecting member 4. During the process of connecting the first connecting rod 3a and the first connecting groove 4a, the limiting block 9 is aligned with the straight groove 10, so that the limiting block 9 enters the straight groove 10. As the second connecting member 4 slowly moves towards the first connecting member 3, the limiting block 9 moves within the straight groove 10 until the limiting block 9 enters the annular groove. At this time, the first connecting rod 3a also enters the first connecting groove 4a, realizing the connection between the first connecting member 3 and the second connecting member 4. Then, the first connecting member 3 is rotated, causing the first connecting rod 3a to rotate. The limiting block 9 moves within the annular groove until it is misaligned with the straight groove 10. Since the limiting block 9 cannot enter the straight groove 10, it achieves the limitation in the direction in which the first connecting rod 3a inserts into the first connecting groove 4a. In other embodiments, the limiting block 9 may not be provided; instead, the first connecting rod 3a and the first connecting groove 4a may be provided with an interference fit. This makes it difficult for the first connecting rod 3a to disengage from the first connecting groove 4a.

[0041] In this embodiment, as Figure 5 and Figure 6As shown, a second connecting rod 4b is provided in the first connecting groove 4a, and a connecting hole 3b is provided on the first connecting rod 3a to mate with the second connecting rod 4b. The connecting hole 3b extends through the connecting base 3c. The connection between the second connecting rod 4b and the connecting hole 3b makes the connection between the first connecting member 3 and the second connecting member 4 more stable. Simultaneously, the second connecting rod 4b is made of metal and is electrically connected to the electrode in the electrode part 2. The handle part 1 includes a contact member that can be electrically connected to the second connecting rod 4b. When the second connecting rod 4b passes through the connecting hole 3b, it is released from the contact member, realizing the electrical connection between the contact member and the second connecting rod 4b, and thus the electrical connection between the contact member and the electrode. The contact member can be electrically connected to the control element of the plasma knife of this invention. Furthermore, when the second connecting rod 4b is inserted into the connecting hole 3b and contacts the contact member, the circuit in the handle part 1 and the circuit in the electrode part 2 are connected. In other embodiments, the second connecting rod 4b and the connecting hole 3b may be omitted, and a connector may be provided on the outer wall of the first connecting member 3 and the second connecting member 4 to realize the electrical connection between the first connecting member 3 and the second connecting member 4.

[0042] In this embodiment, as Figures 7 to 11 As shown, an installation tube 11 is provided in the fourth channel, and both the injection tube 5 and the suction tube 6 located in the fourth channel are disposed within the installation tube 11. This invention, through the installation tube 11, integrates the injection tube 5 and the suction tube 6 entering the fourth channel with the installation tube 11, facilitating the assembly of the electrode part 2, the injection tube 5, and the suction tube 6. In other embodiments, the installation tube 11 may be omitted, and the cross-sections of the injection tube 5 and the suction tube 6 entering the fourth channel may both be semi-circular. The sidewalls of the injection tube 5 and the suction tube 6 entering the fourth channel are interconnected, resulting in circular cross-sections for the injection tube 5 and the suction tube 6 entering the fourth channel.

[0043] In this embodiment, as Figure 10 and Figure 11 As shown, the injection tube 5 and the suction tube 6 located in the fourth channel are symmetrically arranged around the axis of the mounting tube 11. Therefore, the injection tube 5 and the suction tube 6 are relatively evenly distributed within the mounting tube 11, facilitating their operation. In other embodiments, to reduce the impact of the suction tube 6 on the injection tube 5 during liquid aspiration, the injection tube 5 and the suction tube 6 can also be spaced at maximum distance.

[0044] In summary, the plasma knife with replaceable blade of this utility model facilitates blade replacement by providing a detachable connection between the first connector 3 and the second connector 4. Integrating the injection tube 5 and the suction tube 6 onto the second connector 4 facilitates the integration of the blade replacement device with the suction and injection tubes, resulting in a simple structure. The second channel 7 and the third channel are positioned opposite each other on both sides of the second connector 4, facilitating connection of the injection connector 12 and the suction connector 13 to external equipment. Connecting the sidewall of the injection tube 5 in the fourth channel to the sidewall of the suction tube 6 located in the fourth channel facilitates the insertion of the injection tube 5 and the suction tube 6 into the fourth channel. The sieve plate 8 effectively prevents the inhalation of human tissue debris into the injection tube 5, preventing blockage. The first connecting rod 3a and the first connecting groove 4a enable a detachable connection between the handle part 1 and the electrode part 2. The limiting block 9, the straight groove 10, and the annular groove prevent the first connecting rod 3a from easily detaching from the first connecting groove 4a. The second connecting rod 4b and the connecting hole 3b make the connection between the first connecting member 3 and the second connecting member 4 more stable, and facilitate the circuit connection between the circuit in the handle part 1 and the electrode in the electrode part 2. The mounting tube 11 facilitates the assembly of the electrode part 2, the injection tube 5, and the suction tube 6. By defining the positions of the injection tube 5 and the suction tube 6 within the mounting tube 11, the operation of the injection tube 5 and the suction tube 6 is ensured.

[0045] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A replaceable electrode type plasma knife comprising a handle portion (1), an electrode portion (2), a first connecting member (3) provided on the handle portion (1), a second connecting member (4) provided on the electrode portion (2), a liquid injection tube (5) and a suction tube (6), the first connecting member (3) being engaged with the second connecting member (4), characterized in that, The second connecting piece (4) is internally provided with a first channel, a second channel (7) and a third channel, one end of the first channel, the second channel (7) and the third channel extends to the outer surface of the second connecting piece (4), the second channel (7) and the third channel are respectively communicated with the first channel, the electrode part (2) is internally provided with a fourth channel penetrating the electrode part (2), the fourth channel is communicated with the first channel, the liquid injection pipe (5) sequentially passes through the second channel (7) and the first channel and then enters the fourth channel, the suction pipe (6) sequentially passes through the third channel and the first channel and then enters the fourth channel.

2. The replaceable blade tip of the plasma blade according to claim 1, wherein, The second channel (7) and the third channel are oppositely arranged on both sides of the second connecting piece (4).

3. The replaceable blade tip of the plasma blade according to claim 1, wherein, The side wall of the liquid injection pipe (5) located in the fourth channel is connected with the side wall of the suction pipe (6) located in the fourth channel.

4. The replaceable blade tip of the plasma blade according to claim 1, wherein, The liquid injection pipe (5) and the suction pipe (6) extend to the outer surface of the electrode part (2), and the liquid injection pipe (5) is provided with a sieve plate (8) near one end of the fourth channel.

5. The replaceable blade tip of the plasma blade according to claim 1, wherein, The first connecting piece (3) comprises a first connecting rod (3a), and the second connecting piece (4) comprises a first connecting groove (4a) matched with the first connecting rod (3a).

6. The replaceable blade bit of claim 5, wherein, The first connecting groove (4a) is internally provided with a second connecting rod (4b), and the first connecting rod (3a) is provided with a connecting hole (3b) matched with the second connecting rod (4b).

7. The replaceable blade tip of the plasma blade according to claim 5, wherein, The first connecting rod (3a) is in a cylindrical shape, the inner wall of the first connecting groove (4a) is provided with a limiting block (9), the side wall of the first connecting rod (3a) is provided with a ring groove and a straight groove (10) communicated with the ring groove, the straight groove (10) extends to one end of the first connecting rod (3a) facing the second connecting piece (4), and the limiting block (9) enters the ring groove through the straight groove (10).

8. The replaceable blade tip of the plasma blade according to claim 5, wherein, The first connecting rod (3a) is in interference fit with the first connecting groove (4a).

9. The replaceable blade bit of claim 3, wherein, The fourth channel is internally provided with a mounting pipe (11), and the liquid injection pipe (5) located in the fourth channel and the suction pipe (6) located in the fourth channel are arranged in the mounting pipe (11).

10. The replaceable blade bit of claim 9, wherein, The liquid injection pipe (5) located in the fourth channel and the suction pipe (6) located in the fourth channel are respectively arranged in axial symmetry around the axis of the mounting pipe (11).

Images