发明名称 |
Double-lumen follicle-biopsy cannula |
摘要 |
Double-lumen biopsy cannula, especially for follicle biopsy as part of extracorporeal fertilisation, the biopsy cannula having a suction channel (4) with a larger lumen for aspirating the follicle contents, and a rinsing channel (3) with a smaller lumen for supplying rinsing liquid into the interior of the follicle, and the suction and rinsing channels terminating in a sharpened piercing tip. The biopsy cannula is designed as a double-walled tube comprising two coaxial tubes fitted tightly into one another: an outer tube (1) having an essentially circular cross-section and an inner tube (2) which is at a distance from the inner circumference (1.1) of the outer tube (1) with its wall, at least over a part-section of its circumference whose angle at circumference ( alpha ) is smaller than pi /2. The spacing (3) formed as a result between the inner tube and the outer tube having the radial width (a) and the middle chord length (b) is intended as a rinsing channel, whereas the remaining channel cross-section (4) of the inner tube (2) is intended as the suction channel. <IMAGE>
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申请公布号 |
DE3522782(A1) |
申请公布日期 |
1987.01.15 |
申请号 |
DE19853522782 |
申请日期 |
1985.06.26 |
申请人 |
PETER BREHM CHIR.-MECHANIK-WERKZEUGBAU |
发明人 |
TROTNOW,SIEGFRIED,DR.MED.;BREHM,PETER |
分类号 |
A61B10/00;A61B10/02;A61B17/435;(IPC1-7):A61B17/42;A61M1/00 |
主分类号 |
A61B10/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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