Title:
INTRAVASCULAR PUNCTURING SYSTEM USING SHAPE MEMORY ALLOY AND APPLICATION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/019310
Kind Code:
A1
Abstract:
An intravascular puncturing system using a shape memory alloy and an application method thereof. The puncturing system comprises a hollow guiding tube (103) and a head portion, wherein the guiding tube (103) is a helical structure made of metal and comprising a plurality of turns of coil, the head portion comprises a petaloid structure (1) capable of opening and closing and a hollow metal helical tube (2) having a plurality of turns of coil, wherein the petaloid structure (1) and the metal helical tube (2) are both made of a shape memory alloy, and the petaloid structure (1) is formed of a plurality of conical segments (100); when the temperature is T1, the pitch between the adjacent two turns of coil of the metal helical tube (2) decreases, and the conical segments (100) of the petaloid structure (1) close; when the temperature is T0, the pitch between the adjacent two turns of coil of the metal helical tube (2) increases, and the conical segments (100) of the petaloid structure (1) open. All components of the puncturing system cooperate with one another, such that the system can travel well in a blood vessel and enables accurate puncturing of a blood vessel wall, realizing effective sampling for biopsy.
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Inventors:
SHANG HUA (CN)
Application Number:
PCT/CN2018/097465
Publication Date:
January 30, 2020
Filing Date:
July 27, 2018
Export Citation:
Assignee:
SHANG HUA (CN)
International Classes:
A61B10/02; A61B17/34
Domestic Patent References:
| WO2016098082A1 | 2016-06-23 |
Foreign References:
| CN103153201A | 2013-06-12 | |||
| CN202843727U | 2013-04-03 | |||
| CN104013468A | 2014-09-03 | |||
| CN107773274A | 2018-03-09 | |||
| CN104968287A | 2015-10-07 | |||
| US20150039008A1 | 2015-02-05 |
Attorney, Agent or Firm:
BEIJING YESTAR PATENT AGENCY CO., LTD (CN)
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