| 摘要 |
A method and apparatus for catheterization of a body cavity, the catheterization apparatus having a sheath, a cannula with a blunt end and a stylet with a sharp end. To use the apparatus the three elements are initially arranged with the stylet leading the apparatus. The apparatus is advanced a distance into the flesh of a patient. The apparatus is readjusted leaving the cannula in a leading position. The apparatus is then advanced further into the flesh of the patient and into communication with a body cavity. The apparatus is again readjusted, leaving the sheath in communication with the body cavity.
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