| 摘要 |
A sampling catheter having an outer tube of resilient material with a normally closed distal end and an inner flexible tube which is longer than the outer tube and which is normally held in retracted position with respect to the distal end of the outer tube by means of a loop of the inner tube which is fastened to the outer tube. The assembled catheter is disposed in a sealed package with the inner tube in such retracted position.
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