CN211511987U

CN211511987U - Puncture cannula

Info

Publication number: CN211511987U
Application number: CN201922385830.1U
Authority: CN
Inventors: 龚烨; 唐波; 印建新
Original assignee: Jiangsu Kangsai Medical Equipment Technology Co ltd
Current assignee: Jiangsu Kangsai Medical Equipment Technology Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-09-18
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to a puncture cannula, which comprises a cannula body and a head fixed on the upper end of the cannula body, wherein the head comprises a cylindrical shell, an inflation valve, a one-way sealing valve and a detachable conversion cap, and the inflation valve is fixed on the outer side of the cylindrical shell; the one-way sealing valve is arranged between the cylindrical shell and the sleeve body; the detachable conversion cap is mounted at the end of the cylindrical shell. The puncture cannula can enlarge the range of the rod diameter passing through the instrument by matching the detachable conversion caps with different specifications with the cannula body; the one-way sealing valve is matched with the elastic sealing sleeve in the detachable conversion cap, and the one-way sealing valve has a simple structure and a good sealing effect. The one-way sealing valve has self-sealing performance under the action of external pressure, and the overall sealing performance of the puncture cannula is further improved.

Description

Puncture cannula

Technical Field

The utility model relates to the field of medical equipment, specifically a puncture cannula.

Background

With the development of medical technology, medical puncture outfits are more and more widely applied, are suitable for minimally invasive procedures of abdomen, chest and obstetrics and gynecology, provide a passage for the entry of endoscopic instruments, and can provide CO2 gas during the operation.

In a minimally invasive human medical operation, once a disease is found in a human body, an operation or a resection is needed, in the operation process, a puncture outfit is firstly needed to be applied, and the puncture outfit is an operation instrument which punctures the abdominal wall and enters a body cavity channel for other operation instruments, and belongs to a minimally invasive operation instrument. A penetrator typically includes a sleeve assembly that serves as an access channel for other surgical instruments and a penetration rod extending through the sleeve assembly. Firstly, in order to penetrate the skin, firstly, the skin epidermis is cut by a scalpel, then the puncture rod penetrates the skin and enters a body cavity together with a sleeve component, then the puncture rod is drawn out, the sleeve component can be used as a channel for introducing various instruments and tools into the abdominal cavity and providing a gas filling chamber, the abdominal wall is lifted to the upper part of an organ, in order to prevent gas leakage in the abdominal cavity when various instruments and tools are inserted into the abdominal cavity in the operation process, a sealing component is required to be arranged in the sleeve component, the common sealing component generally comprises a mounting seat, a plurality of sealing gaskets which are distributed in a braided shape or are arranged in a circumferentially staggered and superposed mode are arranged on the mounting seat, and the instruments penetrate through the center of the sealing component consisting of the plurality of sealing gaskets. However, the sealing assembly of the puncture sleeve of the existing puncture outfit has poor sealing effect, has poor adaptability to surgical instruments with different sizes, cannot obtain better balance between the whole air tightness and the passing easiness of the surgical instruments, is easy to leak air for the surgical instruments with smaller sizes, can generate great instrument extraction force for the surgical instruments with larger sizes, and even can cause the puncture outfit to fall off from the abdominal wall to lose abdominal pressure, thereby influencing the progress of the operation.

However, in order to meet the requirements of sealing and effective passing of instruments, the puncture outfit for laparoscope in the existing domestic market has a very complicated sleeve part structure, and for example, the sealing device of the disposable puncture outfit disclosed in the Chinese patent CN201620105103 and the puncture outfit disclosed in the Chinese patent CN201610850381 have high production cost and narrow application range.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of overcoming the defects of the prior art and provide a puncture cannula, which can expand the diameter range of instruments by utilizing a detachable conversion cap; the one-way sealing valve is matched with the elastic sealing sleeve in the detachable conversion cap, and the one-way sealing valve has a simple structure and a good sealing effect.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a puncture cannula comprises a cannula body and a sealing head fixed at the upper end of the cannula body, wherein the sealing head comprises a cylindrical shell, an inflation valve, a one-way sealing valve and a detachable conversion cap, and the inflation valve is fixed at the outer side of the cylindrical shell; the one-way sealing valve is arranged between the cylindrical shell and the sleeve body; the detachable conversion cap is mounted at the end of the cylindrical shell.

The detachable conversion cap comprises a cap body, a cap cover, an elastic sealing sleeve, a pressing sleeve ring and a support ring, and the support ring is fixed on the inner wall of the cap body; the elastic sealing sleeve is arranged on the support ring; the pressing sleeve ring is screwed on the inner wall of the cap body through threads and is tightly pressed on the one-way sealing valve; the cap is pressed on the elastic sealing sleeve; the middle of the elastic sealing sleeve is provided with a hole.

The cap is of a hollow structure, the outer side of the cap is provided with an external thread, and the external thread is a sealing pipe thread.

And sealing grooves are formed in the cylindrical shell and the supporting ring.

The one-way sealing valve is in a semi-spiral shape with an open upper end, the total length of the one-way sealing valve is not less than 10mm, a circular branch hanging ring and a positioning bulge are arranged at the upper end of the one-way sealing valve, the positioning bulge is positioned at the lower side of the circular branch hanging ring, and the outer diameter of the positioning bulge is larger than that of the circular branch hanging ring; the lower end of the inner side of the circular supporting and hanging ring is provided with two parallel membranes which are connected end to end, and the cross section of a hollow channel formed by the membranes is spirally and gradually reduced from top to bottom; the thickness of the membrane is 2 mm-3 mm.

The lower end opening of the one-way sealing valve is egg-shaped.

And the outer side surface of the lower half part of the sleeve body is provided with a fixed external thread, and the section of the fixed external thread is semicircular.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

the rod diameter range of the instrument can be enlarged by matching the detachable conversion caps with different specifications with the sleeve body; the one-way sealing valve is matched with the elastic sealing sleeve in the detachable conversion cap, and the one-way sealing valve has a simple structure and a good sealing effect. The one-way sealing valve has self-sealing performance under the action of external pressure, and the overall sealing performance of the puncture cannula is further improved.

Drawings

The technical scheme of the utility model is further explained by combining the attached drawings as follows:

FIG. 1 is a schematic diagram of the appearance structure of the utility model;

FIG. 2 is a schematic sectional view of the present invention;

FIG. 3 is a schematic view of the structure of the one-way sealing valve of the present invention;

FIG. 4 is a schematic cross-sectional view of the one-way sealing valve of the present invention;

FIG. 5 is a schematic cross-sectional view of the cylindrical housing of the present invention;

fig. 6 is the utility model discloses a can dismantle conversion cap sectional structure schematic diagram.

In the figure: 1. a detachable conversion cap; 1-1, covering cap; 1-2, a cap body; 1-2-1, a support ring; 1-2-2, sealing groove A; 1-2-3, internal sealing pipe threads; 1-3, elastic sealing sleeve; 2. a cylindrical housing; 2-1, sealing groove B; 3. a cannula body; 4. fixing the external thread; 5. an inflation valve; 6. a one-way sealing valve; 6-1, a hollow channel; 6-2, positioning protrusions; 6-3, circular supporting rings; 7. and pressing the lantern ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The puncture cannula shown in fig. 1 to 6 comprises a cannula body 1 and a sealing head fixed at the upper end of the cannula body 1, wherein the lower end surfaces of the cannula body 1 and the sealing head, namely the lower end surface of the cylindrical shell 2, are connected in an injection molding mode, so that the sealing performance is ensured.

The end socket comprises a cylindrical shell 2, an inflation valve 5, a one-way sealing valve 6 and a detachable conversion cap 1, wherein the inflation valve 5 directly adopts an outsourcing part, can be connected with an inflation tube for inflation, and also can be deflated after the inflation tube is detached, and the type of the end socket is XN-033 type produced by precision switch screw factories in southwest of city Yuyao.

The inflation valve 5 is fixed on the outer side of the cylindrical shell 2; the one-way sealing valve 6 is arranged between the cylindrical shell 2 and the sleeve body 3; a removable conversion cap 1 is mounted on the end of a cylindrical housing 2.

The one-way sealing valve 6 has self-sealing performance, and when gas enters the cylindrical shell 2 from the inflation valve 5, the lower end opening of the one-way sealing valve 6 is automatically closed under the action of gas pressure. When an appliance passes through the one-way sealing valve 6, the membrane of the one-way sealing valve 6 is tightly attached to the outer wall of the appliance under the action of gas pressure, so that gas is prevented from overflowing.

When the instrument enters the one-way sealing valve 6, the front end structure of the smooth instrument can conveniently pass through the instrument under the condition of ensuring air tightness because the membrane of the one-way sealing valve 6 is made of elastic soft materials.

The membrane of the one-way sealing valve 6 is made of rubber.

The detachable conversion cap 1 comprises a cap body 1-2, a cap cover 1-1, an elastic sealing sleeve 1-3, a pressing sleeve ring 7 and a support ring 1-2-1, wherein the support ring 1-2-1 is fixed on the inner wall of the cap body 1-2; the elastic sealing sleeve 1-3 is arranged on the support ring 1-2-1; the pressing sleeve ring 7 is screwed on the inner wall of the cap body 1-2 through threads, and the pressing sleeve ring 7 is tightly pressed on the one-way sealing valve 6; the cap 1-1 is pressed on the elastic sealing sleeve 1-3; the middle of the elastic sealing sleeve 1-3 is provided with a hole.

The cap 1-1 is a hollow structure, the outer side of the cap is provided with an external thread, and the external thread is a sealing pipe thread and is matched with the internal sealing pipe thread 1-2-3 so as to enhance the sealing performance.

The elastic sealing sleeve 1-3 can be provided with a plurality of layers according to the requirement to enhance the sealing property. The elastic sealing sleeves 1-3 are made of rubber materials, and holes are formed in the middle of the elastic sealing sleeves for facilitating the passing of instruments. Due to different specifications (diameters) of the instruments, the hole diameters of the middle holes of the elastic sealing sleeves 1-3 need to be changed in a matching mode, the range of the diameter of the passing rod of the instrument can be effectively expanded by the aid of the elastic sealing sleeves 1-3 with different middle hole diameters which are stacked in a multi-layer mode, operation efficiency is improved, and use cost is reduced.

Sealing grooves are formed in the cylindrical shell 2 and the supporting ring 1-2-1, wherein the sealing grooves 1-2-2 are formed in the supporting ring 1-2-1 and matched with protrusions on the elastic sealing sleeve 1-3, and the elastic sealing sleeve 1-3 is convenient to install.

The sealing groove 2-1 on the cylindrical shell 2 and the positioning bulge 6-2 on the one-way sealing valve 6 are equipped, so that the one-way sealing valve 6 is convenient to install and seal.

The one-way sealing valve 6 is in a semi-spiral shape with an open upper end, the total length of the one-way sealing valve is not less than 10mm, a circular supporting hanging ring 6-3 and a positioning bulge 6-2 are arranged at the upper end of the one-way sealing valve, the positioning bulge 6-2 is positioned at the lower side of the circular supporting hanging ring 6-3, and the outer diameter of the positioning bulge is larger than that of the circular supporting hanging ring 6-3; the lower end of the inner side of the circular supporting and hanging ring 6-3 is provided with two parallel membranes which are connected end to end, and the cross section of a hollow channel 6-1 formed by the membranes is spirally and gradually reduced from top to bottom; the thickness of the membrane is 2 mm-3 mm.

The lower end opening of the one-way sealing valve 6 is egg-shaped and is open under the non-working state.

The outer side surface of the lower half part of the sleeve body 3 is provided with a fixed external thread 4, and the section of the fixed external thread 4 is semicircular to enhance the connection strength with human tissues.

The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims

1. A puncture cannula, characterized in that: the sealing head comprises a cylindrical shell, an inflation valve, a one-way sealing valve and a detachable conversion cap, wherein the inflation valve is fixed on the outer side of the cylindrical shell; the one-way sealing valve is arranged between the cylindrical shell and the sleeve body; the detachable conversion cap is mounted at the end of the cylindrical shell.

2. The puncture cannula of claim 1, wherein: the detachable conversion cap comprises a cap body, a cap cover, an elastic sealing sleeve, a pressing sleeve ring and a support ring, and the support ring is fixed on the inner wall of the cap body; the elastic sealing sleeve is arranged on the support ring; the pressing sleeve ring is screwed on the inner wall of the cap body through threads and is tightly pressed on the one-way sealing valve; the cap is pressed on the elastic sealing sleeve; the middle of the elastic sealing sleeve is provided with a hole.

3. The puncture cannula of claim 2, wherein: the cap is of a hollow structure, and external threads are arranged on the outer side of the cap and are sealing pipe threads.

4. The puncture cannula of claim 2, wherein: and sealing grooves are formed in the cylindrical shell and the supporting ring.

5. The puncture cannula of claim 1, wherein: the one-way sealing valve is in a semi-spiral shape with an open upper end, the total length of the one-way sealing valve is not less than 10mm, a circular branch hanging ring and a positioning bulge are arranged at the upper end of the one-way sealing valve, the positioning bulge is positioned at the lower side of the circular branch hanging ring, and the outer diameter of the positioning bulge is larger than that of the circular branch hanging ring; the lower end of the inner side of the circular supporting and hanging ring is provided with two parallel membranes which are connected end to end, and the cross section of a hollow channel formed by the membranes is spirally and gradually reduced from top to bottom; the thickness of the membrane is 2 mm-3 mm.

6. The puncture cannula of claim 5, wherein: the lower end opening of the one-way sealing valve is egg-shaped.

7. The puncture cannula of claim 1, wherein: and the outer side surface of the lower half part of the sleeve body is provided with a fixed external thread, and the section of the fixed external thread is semicircular.