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Cannula and method for liposuction

  • US 5,181,907 A
  • Filed: 10/31/1991
  • Issued: 01/26/1993
  • Est. Priority Date: 03/20/1990
  • Status: Expired due to Term
First Claim
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1. The combination of a cannula for aspirating fat from a patient comprising an elongated tubular member having proximal and distal ends wherein said distal end is adapted for insertion into a patient'"'"'s fatty tissue through an incision in the patient'"'"'s body and for being reciprocally inserted into and out of the fatty tissue by a surgeon, said elongated tubular member defining an opening near its distal end, said opening encompassing essentially the entire circumference of the tubular member and means forming a closed rounded or bullet-shaped end portion forwardly of the opening for facilitating its insertion into fatty tissue and passage therethrough, said tubular member further defining means including a plurality of longitudinally extending members projecting radially outwardly from the opening beyond the surface of said tubular member and extending longitudinally in the direction of said tubular member and connecting said tubular member to said bullet-shaped end portion, said longitudinally extending members having relatively thin rounded edges which are adapted to break down fat cells without damaging nerves and/or blood vessels and an annular member transverse of and connecting said longitudinal members for breaking down the fatty tissue and for preventing the area immediately adjacent the opening from coming into contact with the inner surface of a patient'"'"'s skin, said elongated tubular members having a smoothly-contoured outer surface which is substantially symmetrical about its longitudinal axis between said proximal end and said opening, and vacuum means connected to the proximal end of said tubular member so that fat tissue, which is broken down by reciprocating movements of the cannula, is drawn out of the patient and through the tubular member for disposal thereof.

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