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Selectively detachable outer cannula hub

  • US 7,883,476 B2
  • Filed: 02/28/2006
  • Issued: 02/08/2011
  • Est. Priority Date: 11/06/2000
  • Status: Expired due to Fees
First Claim
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1. A medical device for attaching to a handpiece defined by a distal end and having an inner cutting element including an inner cannula that has an open distal end, said medical device comprising:

  • an outer cannula having a proximal end and a distal end, said outer cannula being sized to accept the inner cutting element including the inner cannula; and

    a cannula hub having a bore therethrough, said cannula hub being fixedly attached to said proximal end of said outer cannula and supporting said outer cannula, wherein said cannula hub further comprises a cooperating fitting member that is configured for selective positive engagement with a mating fitting disposed on the distal end of the handpiece so as to selectively and removably secure said cannula hub to said handpiece, the cooperating fitting member including a flange having a plurality of wings separated by a plurality of recessed regions, at least one of the wings having a larger circumferential length than at least one of the remaining wings;

    wherein an instrument is selectively insertable through said bore and into said outer cannula.

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