Ultrasonic knife for laparoscope

Abstract

An ultrasonic scalpel for a laparoscope comprises a handle, a scalpel rod and a scalpel head. The tool bit is combined at the first end of the tool bar, and the handle is combined at the second end of the tool bar. A flushing and sucking sleeve is mounted on the cutter bar; the flushing and sucking sleeve comprises an outer sleeve and an inner sleeve, an upper partition plate and a lower partition plate are formed between the outer sleeve and the inner sleeve, and the space between the inner sleeve and the outer sleeve is divided into a first pipeline and a second pipeline which are independent from each other; the first pipeline is used as a flushing pipeline, and the second pipeline is used as a suction pipeline; a first connecting pipe and a second connecting pipe are integrally formed on the outer side of the second end of the outer sleeve; the first connecting pipe is communicated with the first pipeline and is used for connecting a fluid source for flushing; the second connecting pipe is communicated with the second pipeline and is used for being connected with a negative pressure source for suction; the flushing and sucking sleeve is arranged on the cutter bar in a sliding manner through the inner sleeve; when the flushing and sucking sleeve is in a retreating state, the tool bit is exposed out of one end of the flushing and sucking sleeve; when the flushing and sucking sleeve is in a pushing state, the tool bit is contained in the inner sleeve of the flushing and sucking sleeve.

Description

Technical Field

[0001] The present application relates to a medical device, and particularly to a harmonic scalpel for laparoscopy. Background Art

[0002] Existing harmonic scalpels for laparoscopy, as Figure 1 shown, include a knife head 3, a knife rod 2, and a handle 1; the knife head is combined at the first end of the knife rod, and the handle is combined at the second end of the knife rod. During a surgery under laparoscopy, the knife rod and the knife head are inserted into the patient's abdominal cavity through the instrument channel of the laparoscope, and the clamping of the knife head is achieved by pressing the operating rod on the handle held outside the laparoscope, so as to clamp the tissue to be cut for ultrasonic cutting. During the process of cutting tissue with the harmonic scalpel, fog, blood, and pus are easily generated, and if not cleared in time, it is likely to affect the operation of the surgery. CN209137792 U proposes a harmonic scalpel, in which channels for suction and cleaning are respectively formed on the knife rod, so as to facilitate the realization of the flushing and suction functions without pulling out the harmonic scalpel. However, in this structure, hindered by the knife head, the flushing and suction pipes cannot reach close to the tissue. Taking suction as an example, only when the knife head can be immersed in the liquid can the liquid be pumped out; when the knife head cannot be immersed in the liquid, the suction pipe on the knife rod cannot be inserted into the liquid either, and suction cannot be completed. Therefore, the harmonic scalpel in CN209137792 U is not very ideal in terms of suction and flushing. Summary of the Utility Model

[0003] In view of the above problems, the present application aims to propose a harmonic scalpel for laparoscopy, which can reach close to a predetermined target for flushing or suction.

[0004] The harmonic scalpel for laparoscopy of the present application includes a handle, a knife rod, and a knife head; the knife head is combined at the first end of the knife rod, and the handle is combined at the second end of the knife rod;

[0005] A flushing and suction sleeve is installed on the knife rod;

[0006] The flushing and suction sleeve includes an outer sleeve and an inner sleeve; a predetermined interval is formed between the inner sleeve and the outer sleeve; an upper partition and a lower partition are formed between the inner sleeve and the outer sleeve; the upper partition and the lower partition divide the space between the inner sleeve and the outer sleeve into a first pipe and a second pipe that are independent of each other; the first pipe is used as a flushing pipe, and the second pipe is used as a suction pipe; near the second end of the outer sleeve, a first connecting pipe and a second connecting pipe are integrally formed on the outside of the outer sleeve; the first connecting pipe is communicated with the first pipe; the second connecting pipe is communicated with the second pipe; the first connecting pipe is used to connect a fluid source for flushing; the second connecting pipe is used to connect a negative pressure source for suction;

[0007] The aspiration and irrigation cannula is slidably mounted on the outer periphery of the cutter bar through the inner cannula; when the aspiration and irrigation cannula is in the retracted state, the cutter head is exposed outside one end of the aspiration and irrigation cannula; when the aspiration and irrigation cannula is in the advanced state, the clamped cutter head is received in the inner cannula of the aspiration and irrigation cannula, and the first end of the aspiration and irrigation cannula extends beyond the cutter head.

[0008] Preferably, a bonding ring is mounted on the inner periphery of the inner cannula; the inner periphery of the bonding ring is bonded to the outer periphery of the cutter bar.

[0009] Preferably, a plurality of the bonding rings are formed and distributed along the length direction of the inner cannula.

[0010] Preferably, one of the bonding rings is formed at the second end of the inner cannula.

[0011] Preferably, the first pipe and the second pipe are symmetrically arranged on the left and right sides of the aspiration and irrigation cannula.

[0012] For the ultrasonic scalpel of the present application, the aspiration and irrigation cannula can be slidably mounted on the cutter bar. When the cutter head needs to work, the aspiration and irrigation cannula is retracted to expose the cutter head to facilitate the work of the cutter head; when flushing or aspiration is required, the aspiration and irrigation cannula is advanced so that the cutter head is received in the inner cannula, so that the first ends of the first pipe and the second pipe can be as close as possible to the predetermined target and flushing or aspiration can be carried out as thoroughly as possible. Description of the Drawings

[0013] Figure 1 is a perspective structural schematic diagram of an ultrasonic scalpel for laparoscopy in the prior art.

[0014] Figure 2 is a schematic diagram of the aspiration and irrigation cannula of the ultrasonic scalpel for laparoscopy of the present application in the advanced state.

[0015] Figure 3 is a perspective structural schematic diagram of the aspiration and irrigation cannula of the ultrasonic scalpel for laparoscopy of the present application.

[0016] Figure 4 is Figure 3 a schematic cross-sectional structural diagram of the aspiration and irrigation cannula.

[0017] Figure 5 is Figure 3 a schematic cross-sectional structure diagram of the aspiration and irrigation cannula.

[0018] Figure 6 is a schematic diagram of the aspiration and irrigation cannula of the ultrasonic scalpel for laparoscopy of the present application in the retracted state. Detailed Description of the Embodiment

[0019] Next, the ultrasonic scalpel for laparoscopy of the present application will be described in detail with reference to the drawings.

[0020] The ultrasonic scalpel for laparoscopy of the present application includes a handle 1, a knife rod 2, and a knife head 3; the knife head 3 is coupled to the first end of the knife rod 2, and the handle 1 is coupled to the second end of the knife rod 2. These are the same as the prior art.

[0021] The difference of the present application is that a flushing and suction cannula 4 is installed on the knife rod 2.

[0022] The flushing and suction cannula 4 includes an outer cannula 41e and an inner cannula 41b; a predetermined interval is formed between the inner cannula 41b and the outer cannula 41e. An upper partition 41a1 and a lower partition 41a2 are formed between the inner cannula 41b and the outer cannula 41e. The upper partition 41a1 and the lower partition 41a2 divide the space between the inner cannula 41b and the outer cannula 41e into a first pipeline 41c and a second pipeline 41d that are independent of each other. The first pipeline 41c is used as a flushing pipeline, and the second pipeline 41d is used as a suction pipeline; near the second end of the outer cannula 41e, a first connection pipe 42 and a second connection pipe 43 are integrally formed on the outside of the outer cannula 41e; the first connection pipe 42 communicates with the first pipeline 41c; the second connection pipe 43 communicates with the second pipeline 41d; the first connection pipe 42 is used to connect a fluid source for flushing, such as normal saline; the second connection pipe 43 is used to connect a negative pressure source for suction, such as a suction pump.

[0023] The flushing and suction cannula 4 is slidably installed on the outer periphery of the knife rod 2 through the inner cannula 41b; when the flushing and suction cannula 4 is in the retracted state, the knife head 3 is exposed outside one end of the flushing and suction cannula 4; when the flushing and suction cannula 4 is in the advanced state, the knife head 3 in the clamped state is accommodated in the inner cannula 41b of the flushing and suction cannula 4, and the first end of the flushing and suction cannula 4 extends beyond the knife head 3.

[0024] A bonding ring 44 is installed on the inner periphery of the inner cannula 41b. The bonding ring 44 can be formed of plastic or rubber; the inner periphery of the bonding ring 44 is bonded to the outer periphery of the knife rod 2 to form a predetermined frictional force with the knife rod 2 to hold the flushing and suction cannula 4 on the knife rod 2.

[0025] The bonding rings 44 are formed in a plurality and are distributed along the length direction of the inner cannula 41b.

[0026] One of the bonding rings 44 is formed at the second end of the inner cannula 41b.

[0027] The first pipeline 41c and the second pipeline 41d are symmetrically arranged on the left and right sides of the flushing and suction cannula 4.

[0028] Figure 2 Shown is a schematic diagram of the flushing and suction cannula 4 in the advanced state. At this time, the first end of the flushing and suction cannula 4 extends beyond the knife head, so that suction or flushing can be performed as close as possible to the target area. Figure 6It is a schematic diagram of the aspiration cannula 4 in the retracted state when the cutter head is working. At this time, the cutter head 3 is completely exposed and can cut and work like an ordinary ultrasonic scalpel.

Claims

1. An ultrasonic scalpel for laparoscopy, which comprises a handle, a cutter bar, and a cutter head; the cutter head is coupled to the first end of the cutter bar, and the handle is coupled to the second end of the cutter bar; characterized in that: A flushing and suction cannula is mounted on the cutter bar; The flushing and suction cannula includes an outer cannula and an inner cannula; a predetermined interval is formed between the inner cannula and the outer cannula; an upper partition and a lower partition are formed between the inner cannula and the outer cannula; the upper partition and the lower partition divide the space between the inner cannula and the outer cannula into a first pipe and a second pipe that are independent of each other; the first pipe is used as a flushing pipe, and the second pipe is used as a suction pipe; near the second end of the outer cannula, a first connecting pipe and a second connecting pipe are integrally formed on the outside of the outer cannula; the first connecting pipe communicates with the first pipe; the second connecting pipe communicates with the second pipe; the first connecting pipe is used to connect a fluid source for flushing; the second connecting pipe is used to connect a negative pressure source for suction; The flushing and suction cannula is slidably mounted on the outer periphery of the cutter bar through the inner cannula; when the flushing and suction cannula is in a retracted state, the cutter head is exposed outside one end of the flushing and suction cannula; when the flushing and suction cannula is in a pushed state, the clamped cutter head is received in the inner cannula of the flushing and suction cannula, and the first end of the flushing and suction cannula extends beyond the cutter head.

2. The ultrasonic scalpel for laparoscopy according to claim 1, characterized in that: A bonding ring is mounted on the inner periphery of the inner cannula; the inner periphery of the bonding ring is bonded to the outer periphery of the cutter bar.

3. The ultrasonic scalpel for laparoscopy according to claim 2, characterized in that: The bonding rings are formed in multiple numbers and are distributed along the length direction of the inner cannula.

4. The ultrasonic scalpel for laparoscopy according to claim 3, characterized in that: One of the bonding rings is formed at the second end of the inner cannula.

5. The ultrasonic scalpel for laparoscopy according to claim 1, characterized in that: The first pipe and the second pipe are symmetrically arranged on the left and right sides of the flushing and suction cannula.

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