| 摘要 |
A soft cannula including a flexible exosheath having a flexible, shape retainable annular member attached at one end. In one preferred embodiment the soft cannula includes a retrieval suture attached to the annular member. One end of the soft cannula is positioned within the patient's body cavity so that medical instruments may be inserted into the other and giving access to the patient's body cavity. The present invention also includes at least two preferred methods for inserting the soft cannula.
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