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COAXIAL CANNULA WITH SEALING ELEMENT
专利权人:
C.R. BARD; INC.
发明人:
HESKE, NORBERT F.,HESKE, THOMAS
申请号:
CA2520607
公开号:
CA2520607C
申请日:
2004.03.29
申请国别(地区):
CA
年份:
2012
代理人:
摘要:
The invention relates to a coaxial cannula (1) for extracting samples fromtissue comprising abiopsy needle unit (9) provided with a space for sample extraction and asample separation unit(21) which coaxially encompasses the biopsy needle (9) on an external wall andis longitudinallymovable. The inventive coaxial cannula (1) comprises a sealing element (3)which is arranged onthe proximal end thereof and closes the space between the internal wall of thecoaxial cannulaand the external wall of the sample separation unit. Said coaxial cannula (1)is characterised inthat the sealing element (3) opens an air outlet when the biopsy needle unit(9) is inserted, andprevents air intake when the biopsy needle unit (9) is positioned and vacuumis produced in theinternal chamber of the biopsy needle.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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