Shielded trocar and trocar shield
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United States of America Patent
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Aug 25, 1998
Issued Date -
N/A
app pub date -
Mar 3, 1997
filing date -
May 6, 1994
priority date (Note) -
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Abstract
A trocar is formed from a cannula and an interfitting obturator for penetrating body cavity walls in laparoscopic and endoscopic surgery. The obturator is provided with an improved piercing tip having a pointed blade and an improved double locking blunt nosed shield design. Hydrophilic coatings or components are also employed on the shield and cannula to facilitate quicker shield action covering the pointed blade and ease of entry of the cannula tube through the body cavity wall. The improved shielded trocar is provided with an improved shield having a dolphin-nose shape at its distal end.
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