Scalable minimally invasive dissection needle

Abstract

The present invention provides a retractable minimally invasive dissection needle, which includes a needle-shaped cutter head, a hollow rod-shaped insulating control handle, a switch button and a retractable member. The insulating control handle includes a hand-held outer shell, a rotating outer shell and a clamping member disposed between the rotating outer shell and the retractable member. The retractable member is provided with first teeth, and the clamping member is provided with an opening. One side of the opening is provided with a first slot, a second slot and a third slot. When the first teeth are located in the first slot, the front end of the needle-shaped cutter head is located inside the front end of the hand-held outer shell. By pushing the retractable member, the first teeth move forward and are engaged in the second slot, and the needle-shaped cutter head extends out by a short needle-shaped cutter head length. Continuing to push the retractable member forward and engaging it in the third slot, the needle-shaped cutter head extends out by a long needle-shaped cutter head length, realizing the adjustable length of the cutter head of the dissection needle and reducing the risk of accidentally injuring non-operative areas. After use, the front end of the needle-shaped cutter head can be retracted inside the front end of the hand-held outer shell by rotating the rotating outer shell.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a retractable minimally invasive dissection needle. Background Art

[0002] The minimally invasive dissection needle, also known as a micro high-frequency needle-shaped electrode, is an electrosurgical instrument that replaces a mechanical scalpel for tissue cutting. When the high-frequency high-voltage current generated by the effective electrode tip contacts the body, it heats the tissue to achieve the separation and coagulation of the body tissue, thereby achieving the purpose of cutting and hemostasis, and is more applied to minimally invasive surgeries. Generally, the lengths of the dissection needles required for different tissue sites are often different, but the existing minimally invasive dissection needles all have the problem that the length of the knife head of the dissection needle cannot be adjusted. An overly long knife head will accidentally injure non-operative areas during the operation and needs to be improved. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a retractable minimally invasive dissection needle with an adjustable length of the knife head, which can reduce the risk of accidentally injuring non-operative areas.

[0004] The technical solution of the present invention is realized as follows:

[0005] A retractable minimally invasive dissection needle includes a needle-shaped knife head, a hollow rod-shaped insulating control handle, a switch button, and a telescopic member. The rear end of the needle-shaped knife head is connected to the front end of the telescopic member. The insulating control handle is wrapped around the outside of the needle-shaped knife head and the telescopic member. The rear end of the telescopic member is exposed outside the insulating control handle. The switch button is arranged on the outer side of the front part of the insulating control handle.

[0006] The insulating control handle includes a hand-held outer shell, a rotatable outer shell relative to the hand-held outer shell, and a clamping member. The hand-held outer shell, the rotatable outer shell, and the clamping member are coaxially arranged. The rotatable outer shell is connected to the rear end of the hand-held outer shell. The clamping member is arranged between the rotatable outer shell and the telescopic member, and the clamping member is fixedly connected to the rotatable outer shell.

[0007] The telescopic member is provided with first teeth. The front-facing surface of the first teeth is an inclined surface. The clamping member is axially provided with an opening. On one side of the opening, a first slot, a second slot, and a third slot are arranged in sequence from back to front. The first slot is arranged at the rear end of the opening, and the third slot is arranged at the front end of the opening. When the first teeth are located in the first slot, the front end of the needle-shaped knife head is located inside the front end of the hand-held outer shell.

[0008] Preferably, the outer surface of the rotatable outer shell is provided with a mark indicating the rotation direction of the rotatable outer shell.

[0009] Preferably, the rear end of the hand-held outer shell is provided with a clamping block, and the front end of the rotatable outer shell is circumferentially provided with a rotation groove. The clamping block is clamped with the rotation groove.

[0010] Preferably, the inner surface of the rotating outer shell is provided with convex strips, and the clamping member is provided with a connection port adapted to the convex strips.

[0011] Preferably, a supporting member is arranged inside the insulating operating handle. The supporting member includes a cutter head supporting portion and a clamping member connecting portion located at the rear end of the cutter head supporting portion. The longitudinal section of the cutter head supporting portion is semi-circular. The clamping member connecting portion is clamped with the clamping member. A button connecting portion is arranged above the cutter head supporting portion. The button connecting portion is connected to the lower end of the switch button. A limiting block is arranged in the middle of the cutter head supporting portion.

[0012] Preferably, the needle-shaped cutter head includes a metal part and an insulating part. The metal part includes a cutter tip part and a cutter body part. The cutter tip part is conical. The insulating part is coated on the outside of the cutter body part, and the cutter tip part is exposed outside the insulating part.

[0013] Preferably, the metal part is made of pure tungsten or tungsten alloy. The material of the insulating part is medical Teflon or medical fluorinated ethylene propylene copolymer. The material of the insulating operating handle is polyolefin resin or fluoropolymer.

[0014] Preferably, a second tooth is arranged in front of the first tooth, and the distance between the first tooth and the second tooth is greater than the distance between the first slot and the third slot.

[0015] Preferably, it further includes a power cord and a connector. The telescopic member has a hollow cavity. The rear end of the needle-shaped cutter head is located in the hollow cavity. One end of the power cord is located in the hollow cavity and is electrically connected to the rear end of the needle-shaped cutter head, and the other end is electrically connected to the connector.

[0016] Preferably, the number of the switch buttons is two, one of which is a cutting button and the other is an ablation button.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The retractable minimally invasive dissection needle includes a needle-shaped cutter head, a hollow rod-shaped insulating operating handle, a switch button and a telescopic member. The insulating operating handle includes a hand-held outer shell, a rotating outer shell and a clamping member provided with an opening. The opening side of the clamping member is provided with a first slot, a second slot and a third slot. The telescopic member is provided with a first tooth. When the first tooth is located in the first slot, the front end of the needle-shaped cutter head is located inside the front end of the hand-held outer shell. By pushing the telescopic member, the first tooth moves forward and is clamped into the second slot or the third slot. When the first tooth is located in the second slot, the needle-shaped cutter head extends out a short needle-shaped cutter head length. When the first tooth is located in the third slot, the needle-shaped cutter head extends out a long needle-shaped cutter head length, realizing that the length of the cutter head of the dissection needle can be adjusted, and reducing the risk of accidentally injuring non-surgical areas. After use, the rotating outer shell can be rotated to drive the clamping member to rotate, and the first tooth located in the second slot or the third slot moves to the rear end of the opening, so that the front end of the needle-shaped cutter head retracts inside the front end of the hand-held outer shell. Brief Description of the Drawings

[0019] Figure 1 is a perspective view of the present invention;

[0020] Figure 2 is an exploded view of the present invention;

[0021] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0022] Figure 4 is a front view of the rotating housing in the present invention;

[0023] Figure 5 is Figure 4 a sectional structure schematic view along line B-B in

[0024] Figure 6 is a top view of the rotating housing in the present invention;

[0025] Figure 7 is a structural schematic view of the clamping member in the present invention;

[0026] Figure 8 is a structural schematic view of the telescopic member, the clamping member and the needle-shaped cutter head in the initial state of the present invention;

[0027] Figure 9 is a structural schematic view of the telescopic member, the clamping member and the needle-shaped cutter head when the needle-shaped cutter head with a short extension length is extended in the present invention;

[0028] Figure 10 is a structural schematic view of the telescopic member, the clamping member and the needle-shaped cutter head when the needle-shaped cutter head with a long extension length is extended in the present invention;

[0029] Figure 11 is a structural schematic view of the supporting member in the present invention;

[0030] Figure 12 is a sectional structural schematic view of the needle-shaped cutter head in the present invention.

[0031] Reference Signs in the Drawings:

[0032] 1 - Needle-shaped cutter head; 11 - Metal part; 111 - Tip part; 112 - Cutter body part; 12 - Insulating part;

[0033] 2 - Insulating control handle; 21 - Hand-held housing; 211 - Clamping block; 22 - Rotating housing; 221 - Rotating groove; 222 - Rib; 223 - Mark; 23 - Clamping member; 231 - First card slot; 232 - Second card slot; 233 - Third card slot; 234 - Opening; 235 - Connection port; 24 - Supporting member; 241 - Cutter head supporting part; 242 - Limiting block; 243 - Button connection part; 244 - Clamping member connection part;

[0034] 3 - Switch button;

[0035] 4 - Power cord;

[0036] 5 - Connector;

[0037] 6 - Telescopic member; 61 - First engaging tooth; 62 - Second engaging tooth. Detailed implementation manner

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] See Figures 1 to 10 , a retractable minimally invasive dissection needle, including a needle - shaped cutter head 1, a hollow rod - shaped insulating control handle 2, a switch button 3 and a telescopic member 6. The rear end of the needle - shaped cutter head 1 is connected to the front end of the telescopic member 6. The insulating control handle 2 is wrapped outside the needle - shaped cutter head 1 and the telescopic member 6. The rear end of the telescopic member 6 is exposed outside the insulating control handle 2. The switch button 3 is arranged on the outer side of the front part of the insulating control handle 2;

[0040] The insulating control handle 2 includes a hand - held outer shell 21, a rotatable outer shell 22 relative to the hand - held outer shell 21 and a clamping member 23. The hand - held outer shell 21, the rotatable outer shell 22 and the clamping member 23 are coaxially arranged. The rotatable outer shell 22 is connected to the rear end of the hand - held outer shell 21. The clamping member 23 is arranged between the rotatable outer shell 22 and the telescopic member 6, and the clamping member 23 is fixedly connected to the rotatable outer shell 22;

[0041] The telescopic member 6 is provided with a first engaging tooth 61. The front - facing surface of the first engaging tooth 61 is an inclined surface. The clamping member 23 is axially provided with an opening 234. On one side of the opening 234, a first engaging groove 231, a second engaging groove 232 and a third engaging groove 233 are arranged in sequence from back to front. The first engaging groove 231 is arranged at the rear end of the opening 234, and the third engaging groove 233 is arranged at the front end of the opening 234. When the first engaging tooth 61 is located in the first engaging groove 231, the front end of the needle - shaped cutter head 1 is located inside the front end of the hand - held outer shell 21, and the inclined surface enables the first engaging tooth 61 to move forward.

[0042] See Figure 8 , Figure 9 and Figure 10 , in the initial state, the first engaging tooth 61 is located in the first engaging groove 231. At this time, the front end of the needle - shaped cutter head 1 is located inside the front end of the hand - held outer shell 21; when performing an operation, the operator can select the length of the front - end extension of the short or long needle - shaped cutter head 1 according to needs:

[0043] When it is necessary to extend the length of the short needle-shaped cutter head, the operator holds the hand-held housing 21 with one hand and pushes the rear end of the telescopic member 6 with the other hand, so that the telescopic member 6 moves forward and drives the needle-shaped cutter head 1 to move forward. The first engaging teeth 61 on the telescopic member 6 move forward through its inclined surface and are engaged with the second card slot 232. At this time, the front end of the needle-shaped cutter head 1 extends out of the front end of the hand-held housing 21, and the length of the short needle-shaped cutter head is extended, which can reduce the risk of accidentally injuring the non-operative area;

[0044] When it is necessary to extend the length of the long needle-shaped cutter head, the rear end of the telescopic member 6 is pushed again, so that the telescopic member 6 continues to move forward and drives the needle-shaped cutter head 1 to move forward. The first engaging teeth 61 on the telescopic member 6 move forward through its inclined surface and are engaged with the third card slot 233. At this time, the front end of the needle-shaped cutter head 1 extends out of the front end of the hand-held housing 21 by a longer length. The distance between the first card slot 231 and the second card slot 232 and the distance between the second card slot 232 and the third card slot 233 can be set according to the extension length of the needle-shaped cutter head;

[0045] After use, the operator holds the hand-held housing 21 with one hand and holds the rotating housing 22 with the other hand and rotates it to the side away from the opening 234 of the first card slot 231. When the rotating housing 22 rotates, it drives the positioning member 23 to rotate, and the first engaging teeth 61 located in the second card slot 232 or the third card slot 233 move to the rear end of the opening 234. At this time, the front end of the needle-shaped cutter head 1 retracts into the front end interior of the hand-held housing 21. If it is necessary to extend the front end of the needle-shaped cutter head 1 again, it is necessary to first rotate the rotating housing 22 to the side close to the opening 234 of the first card slot 231 to move the first engaging teeth 61 into the first card slot 231 to restore the initial state.

[0046] Preferably, referring to Figure 6 , a mark 223 indicating the rotation direction of the rotating housing 22 is provided on the outer surface of the rotating housing 22 to remind the operator of the rotation direction of the rotating housing 22 so that the front end of the needle-shaped cutter head 1 retracts into the front end interior of the hand-held housing 21.

[0047] Preferably, referring to Figure 2 、 Figure 3 and Figure 4 , a clamping block 211 is provided at the rear end of the hand-held housing 21, and a rotating groove 221 is circumferentially provided at the front end of the rotating housing 22. The clamping block 211 is clamped with the rotating groove 221, and the clamping block 211 can move circumferentially along the rotating housing 22 in the rotating groove 221 to realize the rotation of the rotating housing 22.

[0048] Preferably, referring to Figure 4 、 Figure 5 and Figure 7, the inner surface of the rotating housing 22 is provided with a rib 222, and the positioning member 23 is provided with a connection port 235 adapted to the rib 222. The positioning member 23 is fixedly connected to the rotating housing 22 through the cooperation of the rib 222 and the connection port 235. When the rotating housing 22 rotates, the positioning member 23 is driven to rotate.

[0049] Preferably, referring to Figure 1 and Figure 2 , a supporting member 24 is arranged inside the insulating control handle 2. The supporting member 24 includes a cutter head supporting portion 241 and a positioning member connecting portion 244 located at the rear end of the cutter head supporting portion 241. The longitudinal section of the cutter head supporting portion 241 is semicircular. The cutter head supporting portion 241 is used to support the needle-shaped cutter head 1. The positioning member connecting portion 244 is clamped with the positioning member 23. A button connecting portion 243 is arranged above the cutter head supporting portion 241. The button connecting portion 243 is connected to the lower end of the switch button 3. A limiting block 242 is arranged in the middle of the cutter head supporting portion 241. The limiting block 242 is used to limit the needle-shaped cutter head 1 to move forward or backward within the cutter head supporting portion 241, so that the extension or retraction of the needle-shaped cutter head 1 is smoother.

[0050] Preferably, referring to Figure 10 , the needle-shaped cutter head 1 includes a metal part 11 and an insulating part 12. The metal part 11 includes a cutter tip part 111 and a cutter body part 112. The cutter tip part 111 is conical. The insulating part 12 is coated on the outside of the cutter body part 112. The cutter tip part 111 is exposed outside the insulating part 12.

[0051] Preferably, the metal part 11 is made of pure tungsten or tungsten alloy, the material of the insulating part 12 is medical Teflon or medical fluorinated ethylene propylene copolymer, and the material of the insulating control handle 2 is polyolefin resin or fluoropolymer.

[0052] Preferably, a second tooth 62 is arranged in front of the first tooth 61. The distance between the first tooth 61 and the second tooth 62 is greater than the distance between the first slot 231 and the third slot 233. The arrangement of the two teeth can prevent the telescopic member 6 from disengaging from the insulating control handle 2.

[0053] Preferably, referring to Figure 1 and Figure 2 , the retractable minimally invasive dissection needle further includes a power cord 4 and a connector 5. The telescopic member 6 has a hollow cavity. The rear end of the needle-shaped cutter head 1 is located in the hollow cavity. One end of the power cord 4 is located in the hollow cavity and is electrically connected to the rear end of the needle-shaped cutter head 1, and the other end is electrically connected to the connector 5.

[0054] Preferably, the number of the switch buttons 3 is two. One is a cutting button and the other is an ablation button. During the operation, according to the need, press the cutting button or the ablation button to switch the electrocoagulation or electrocision function.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A retractable minimally invasive dissection needle, characterized in that: It includes a needle-shaped cutter head (1), a hollow rod-shaped insulating control handle (2), a switch button (3), and a telescopic member (6). The rear end of the needle-shaped cutter head (1) is connected to the front end of the telescopic member (6). The insulating control handle (2) covers the outside of the needle-shaped cutter head (1) and the telescopic member (6). The rear end of the telescopic member (6) is exposed outside the insulating control handle (2). The switch button (3) is arranged on the outer side of the front part of the insulating control handle (2). The insulating control handle (2) includes a hand-held outer shell (21), a rotatable outer shell (22) relative to the hand-held outer shell (21), and a clamping member (23). The hand-held outer shell (21), the rotatable outer shell (22), and the clamping member (23) are coaxially arranged. The rotatable outer shell (22) is connected to the rear end of the hand-held outer shell (21). The clamping member (23) is arranged between the rotatable outer shell (22) and the telescopic member (6), and the clamping member (23) is fixedly connected to the rotatable outer shell (22). The telescopic member (6) is provided with a first tooth (61). The front-facing side of the first tooth (61) is an inclined surface. The clamping member (23) is axially provided with an opening (234). One side of the opening (234) is successively provided with a first slot (231), a second slot (232), and a third slot (233) from back to front. The first slot (231) is arranged at the rear end of the opening (234). The third slot (233) is arranged at the front end of the opening (234). When the first tooth (61) is located in the first slot (231), the front end of the needle-shaped cutter head (1) is located inside the front end of the hand-held outer shell (21). The number of the switch buttons (3) is two. One is a cutting button and the other is an ablation button. The outer surface of the rotatable outer shell (22) is provided with a mark (223) indicating the rotation direction of the rotatable outer shell (22), or the inner surface of the rotatable outer shell (22) is provided with a rib (222). The clamping member (23) is provided with a connection port (235) adapted to the rib (222).

2. The retractable minimally invasive dissection needle according to claim 1, wherein: The rear end of the hand-held outer shell (21) is provided with a clamping block (211). The front end of the rotatable outer shell (22) is circumferentially provided with a rotation groove (221). The clamping block (211) is clamped with the rotation groove (221).

3. The telescopic minimally invasive dissection needle according to claim 1, characterized in that: An abutting member (24) is arranged inside the insulating control handle (2). The abutting member (24) includes a cutter head abutting portion (241) and a clamping member connection portion (244) located at the rear end of the cutter head abutting portion (241). The longitudinal section of the cutter head abutting portion (241) is semicircular. The clamping member connection portion (244) is clamped with the clamping member (23). Above the cutter head abutting portion (241), there is a button connection portion (243). The button connection portion (243) is connected to the lower end of the switch button (3). A limiting block (242) is arranged in the middle of the cutter head abutting portion (241).

4. The retractable minimally invasive dissection needle according to claim 1, wherein: The needle-shaped cutter head (1) includes a metal part (11) and an insulating part (12). The metal part (11) includes a tip part (111) and a cutter body part (112). The tip part (111) is conical. The insulating part (12) covers the outside of the cutter body part (112), and the tip part (111) is exposed outside the insulating part (12).

5. The retractable minimally invasive dissection needle according to claim 4, wherein: The metal part (11) is made of pure tungsten or tungsten alloy. The material of the insulating part (12) is medical Teflon or medical ethylene-propylene fluoride copolymer. The material of the insulating control handle (2) is polyolefin resin or fluoropolymer.

6. The retractable minimally invasive dissection needle according to claim 1, characterized in that: A second tooth (62) is provided in front of the first tooth (61). The distance between the first tooth (61) and the second tooth (62) is greater than the distance between the first slot (231) and the third slot (233).

7. The retractable minimally invasive dissection needle according to claim 1, wherein: It further includes a power cord (4) and a connector (5). The telescopic member (6) has a hollow cavity. The rear end of the needle-shaped cutter head (1) is located in the hollow cavity. One end of the power cord (4) is located in the hollow cavity and is electrically connected to the rear end of the needle-shaped cutter head (1), and the other end is electrically connected to the connector (5).

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