CN-224220197-U - Suction catheter and suction system

CN224220197UCN 224220197 UCN224220197 UCN 224220197UCN-224220197-U

Abstract

The application provides a suction catheter and a suction system, and relates to the technical field of medical appliances. The suction catheter can keep the outer diameter of the suction catheter smaller, and is beneficial to fully utilizing the larger lumen of the guide catheter to improve the suction flow rate and suction force. The suction catheter comprises a catheter part, an expansion part, a fluid component and a developing part, wherein the catheter part is provided with a suction flow channel, the expansion part is arranged on the outer wall of the proximal end of the catheter part, the expansion part is connected with the outer wall of the catheter part in a sealing way and surrounds to form an expansion cavity, the expansion part is elastic, the fluid component is connected with the wall of the catheter part and extends to a position corresponding to the expansion cavity, the fluid component is provided with a fluid channel, the fluid channel is communicated with the expansion cavity, the developing part is arranged on the portion of the distal end of the catheter part, and the developing part is used for displaying the position of the portion of the distal end of the catheter part.

Inventors

TAN RUIZHE
HUANG LIN
LIU CHAOSHENG
ZHANG ZHIJUN

Assignees

广东博迈元通医疗科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (12)

1. A suction catheter, comprising: A conduit member having a suction flow path; The expansion piece is arranged on the outer wall of the proximal end of the catheter piece, is in sealing connection with the outer wall of the catheter piece and encloses to form an expansion cavity, and has elasticity; A fluid assembly connected to a wall of the conduit member and extending to a position corresponding to the expansion chamber, the fluid assembly having a fluid passage in communication with the expansion chamber; And the developing piece is arranged on the part of the distal end of the catheter piece and is used for displaying the position of the part of the distal end of the catheter piece.
2. The aspiration catheter of claim 1, wherein the catheter member comprises an anti-snag layer surrounding the aspiration flow path, a retention layer surrounding the anti-snag layer to limit radial movement of the anti-snag layer, and a conditioning layer surrounding the retention layer.
3. The aspiration catheter of claim 2, wherein the retention layer has a strength greater than the strength of the adjustment layer and/or the retention layer has a strength greater than the strength of the anti-snag layer.
4. The aspiration catheter of claim 2, wherein said adjustment layer comprises at least two adjustment sections, at least two of said adjustment sections being sequentially disposed axially of said catheter member, wherein the hardness of said adjustment section adjacent to the proximal end of said catheter member is greater than the hardness of said adjustment section distal to the proximal end of said catheter member.
5. A suction catheter according to any of claims 1 to 4, wherein the portion of the fluid assembly that is connected to the tube wall extends within the tube wall in the axial direction of the catheter member.
6. The aspiration catheter of any one of claims 1 to 4, wherein said fluid assembly comprises an extension member and a connector member, each of said extension member and said connector member extending axially of said catheter member, a proximal end of said connector member being sealingly connected to a distal end of said extension member, each of said extension member and said connector member having said fluid passageway, said tube wall having an inflation port through which said fluid passageway and said inflation lumen communicate, said extension member having a hardness greater than a hardness of said connector member.
7. The aspiration catheter of claim 6, wherein the distal portion of the extension member is an insertion section and the proximal portion of the extension member is an extension section, the extension section being adapted to be coupled to a delivery device, the connector being in socket engagement with the insertion section, the insertion section and the connector being in sealing engagement with the wall of the catheter member.
8. The aspiration catheter of claim 7, wherein the cross-sections of the insertion section and the connector are each in a flat ring shape, the length of the minor axis of the flat ring shape is smaller than the length of the major axis of the flat ring shape, and the length of the major axis is greater than the thickness of the wall of the catheter member, the extending direction of the major axis is directed to the circumferential direction of the catheter member, and the minor axis and the radial direction of the catheter member satisfy a parallel relationship.
9. The aspiration catheter of claim 8, wherein the short axis has a length less than or equal to 0.15mm and/or the long axis has a length less than or equal to 0.6mm.
10. The aspiration catheter of claim 7, wherein the extension has an outer diameter greater than an outer diameter of the insertion section, and/or wherein the extension has an outer diameter greater than or equal to 0.5mm and the insertion section has an outer diameter less than or equal to 0.4mm.
11. The aspiration catheter of claim 6, wherein the proximal end of the connector is sleeved on and bonded to the distal end of the elongate member.
12. A suction system, comprising: A guide catheter, a delivery device, a suction apparatus and a suction catheter according to any one of claims 1 to 11; the guide catheter is provided with a guide channel, the inner diameter of the guide channel is larger than the outer diameter of the catheter part, the conveying device is connected with the fluid assembly, the conveying device is filled with fluid into the expansion cavity through the fluid assembly, the expansion part can fill a gap between the catheter part and the guide catheter, the suction flow channel is communicated with the guide channel, and the suction device sucks clotting at the distal end of the catheter part through the suction flow channel and the guide channel.

Description

Suction catheter and suction system Technical Field The application relates to the technical field of medical instruments, in particular to a suction catheter and a suction system. Background Percutaneous coronary intervention (percutaneous transluminal coronary intervention, PCI) is an interventional procedure for dredging stenosed or blocked coronary arteries and improving the blood supply of the heart by a minimally invasive catheter technology, and is commonly used for treating diseases such as coronary heart disease, acute myocardial infarction and the like. The core steps of PCI include puncture of blood vessel, guiding of catheter, balloon expansion, implantation of stent, etc., and PCI has the characteristics of small wound and quick recovery. In performing PCI surgery, thrombus is typically removed from the vessel by aspiration catheter. In the related art, the size of the aspiration catheter is large, particularly the outer diameter of the aspiration catheter is large, so that the aspiration catheter is not easy to enter into the blood vessel with small size. Disclosure of utility model The application provides a suction catheter and a suction system, which can keep the smaller outer diameter of the suction catheter, and is beneficial to fully utilizing the larger lumen of a guide catheter to improve the suction flow rate and suction force. The application provides a suction catheter which comprises a catheter part, an expansion part, a fluid component and a developing part, wherein the catheter part is provided with a suction flow passage, the expansion part is arranged on the outer wall of the proximal end of the catheter part, the expansion part is in sealing connection with the outer wall of the catheter part and surrounds the outer wall of the catheter part to form an expansion cavity, the expansion part is elastic, the fluid component is connected with the wall of the catheter part and extends to a position corresponding to the expansion cavity, the fluid component is provided with a fluid passage, the fluid passage is communicated with the expansion cavity, the developing part is arranged on the portion of the distal end of the catheter part, and the developing part is used for displaying the position of the portion of the distal end of the catheter part. According to the suction catheter provided by the embodiment of the application, as the expansion piece is arranged on the outer wall of the catheter piece, the volume of the expansion piece can be changed by conveying fluid into the expansion cavity formed by the expansion piece and the catheter piece, so that a gap between the catheter piece and the guide catheter can be filled by the expansion piece, and when the guide catheter is sucked, negative pressure with larger pressure is generated in the catheter piece. And the distal end of the catheter member is provided with the developing member, and the specific position of the distal end of the catheter member in the blood vessel can be rapidly determined in real time through the developing member, so that a doctor can conveniently confirm whether the distal end of the catheter member is close to thrombus. And simultaneously, the fluid component is connected with the pipe wall of the pipe guide piece, and extends to a position corresponding to the expansion cavity, so that the fluid can be conveyed into the expansion cavity through the fluid channel of the fluid component. The structure is arranged, the pipe wall of the guide pipe piece can be utilized to provide an installation position for the fluid component, the fluid component is not required to be attached to the inner wall or the outer wall of the guide pipe piece, so that the fluid component is not required to be completely protruded on the outer wall of the guide pipe piece, the whole radial dimension of the suction pipe is not required to be changed, the suction pipe can be kept to be smaller in outer diameter, and the large pipe cavity of the guide pipe is beneficial to being fully utilized to improve the suction flow rate and suction force. In one possible implementation of the application, the conduit member includes an anti-drag layer, a retaining layer, and an adjustment layer, the anti-drag layer surrounding the suction flow path, the retaining layer coating the anti-drag layer to limit radial movement of the anti-drag layer, the adjustment layer coating the retaining layer. In one possible implementation of the application, the strength of the retaining layer is greater than the strength of the adjustment layer and/or the strength of the retaining layer is greater than the strength of the anti-blocking layer. In one possible implementation of the application, the adjustment layer comprises at least two adjustment sections, which are distributed in sequence along the axial direction of the catheter member, and of the adjacent two adjustment sections, the hardness of the adjustment section near the proximal end of the cathe