| 摘要 |
<p>The present invention is an aspiration needle apparatus (11) for collecting cell samples from tissue comprising a vacuum container (13) having an enclosed evacuated space evacuated to a subambient pressure, and sealed by a penetrable diaphragm (39). An adapter (14, 242) has a recess to receive the vacuum container. A needle (16, 222) is carried by the adapter that has a distal extremity serving as an aspiration needle to collect the cell sample, has a proximal extremity disposed in the recess, and is capable of penetrating the diaphragm of the vacuum container to couple the evacuated space to the flow passage of the needle to supply a subambient pressure to the distal extremity of the needle. An on/off mechanism (261) carried by the adapter includes yieldable means (276), and a member (284) mounted in the recess actuatable by axial movement of the vacuum container into the recess against the force of the yielding means disposed within the recess.</p> |
