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Trocar with floating septum seal

DC
  • US 5,385,553 A
  • Filed: 06/15/1993
  • Issued: 01/31/1995
  • Est. Priority Date: 07/18/1991
  • Status: Expired due to Term
First Claim
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1. A trocar adapted to form an access channel across a body wall, and configured to receive a surgical instrument, the trocar comprising:

  • a cannula having an axis extending between a proximal end and a distal end of the trocar;

    a seal housing disposed at the distal end of the cannula and forming with the cannula the access channel of the trocar;

    a flexible valve disposed relative to the housing and across the access channel, the valve having elastomeric properties for forming a seal with the instrument when the instrument is disposed in the access channel;

    first portions of the valve defining an orifice which is normally concentric with the axis of the cannula, the first portions being sized and configured to receive the instrument and form the seal with an outer surface of the instrument; and

    second portions of the valve disposed circumferentially outwardly of the first portions of the valve for facilitating movement of the orifice from a first position generally concentric with the axis of the cannula to a second position generally removed from the axis of the cannula, in response to insertion of the instrument along a line removed from the axis of the cannula.

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