Patent ID: 9089361
Filing Date: 2015-07-28
Classification: A61B,A61M

Abstract:
1. An apparatus for removing tissue from a subject, the apparatus comprising: a cannula configured for insertion into a subject's body, the cannula having a longitudinal axis that runs in a proximal-to-distal direction, the cannula having sidewalls that define an interior cavity, wherein the cavity has a closed distal end, and wherein the sidewalls have at least one orifice that is substantially parallel to the longitudinal axis and is configured to permit material to enter the cavity; a suction source configured to generate a negative pressure within the cavity so that (a) the negative pressure draws a portion of the tissue into the at least one orifice in a direction that is perpendicular to the longitudinal axis and (b) loose material that is located in the cavity is drawn away; a delivery tube having an exit port that is located within the cavity, wherein the delivery tube and the exit port are configured so that fluid that exits the delivery tube will impinge against the portion of the tissue that is drawn into the orifice by the suction source; a container configured to hold fluid; a temperature control system configured to maintain the fluid at a temperature between 100° F. and 140° F.; a pump configured to pump the temperature-controlled fluid through the delivery tube so that the temperature-controlled fluid is delivered in pulses at a pressure between 600 and 1300 psi; and wherein the cavity in which the negative pressure is generated has a closed distal end, wherein at least a portion of the cavity in which the negative pressure is generated extends distally beyond the orifice, and wherein the fluid is delivered fluid in pulses at a pulse rate of 20-150 pulses per second.