| 摘要 |
<p>A double cannula system especially for oocyte retrieval is described. The double cannula system has an outer (1) and an inner (2) cannula, the inner cannula can operate freely within the outer cannula, the inner cannula can be removed from the outer cannula, and both cannulas have a tip which is sharp and bevelled. The tip of the inner cannula of the double cannula system is in front when introduced into an individual, and the inner cannula is used to locate one or more portions of anaesthesia when the inner cannula stepwise is introduced into the individual. The tip of the outer cannula follows behind the tip of the inner cannula. The inner cannula is removed before cells and/or body liquid is retrieved through the outer cannula.</p> |
