Patent ID: 6027502
Filing Date: 2000-02-22
Classification: A61B,A61M

Abstract:
A surgical instrument comprising:(a) a probe assembly including(i) an elongated probe for insertion into a patient's body interior, said probe having at least one bore therethrough;(ii) irrigation means providing passage of fluids for irrigating said body interior; and(iii) evacuation means providing passage for evacuating matter from said body interior;(b) a pump remotely located from said probe assembly for pumping irrigation fluid from a source of said fluid through said irrigation means into said body interior, said pump including(i) a replaceable pump cartridge assembly including(a) a cartridge housing assembly having(i) a cavity with an opening with a perimeter defined by a first annular rim;(ii) a one way fluid inlet to said cavity;(iii) a one way fluid outlet from said cavity;(iv) a second annular rim surrounding said first annular rim forming an annular channel therebetween;(v) at least two tabs extending from said second annular rim and;(vi) a flexible diaphragm for covering said opening, said diaphragm having a protruding rim portion for seating in said channel;(ii) a motor drive assembly including(a) a motor drive housing;(b) a motor and reciprocating drive for actuating a piston to drive said diaphragm; and(iii) a plug including(a) a flange for attachment to said motor drive housing;(b) an annular hole through said flange for passage of said pistson;(c) an annular ridge surrounding said hole; and(d) at least two clips for securely engaoing said tabs to engage said pump cartridge assembly with said plug and causing said diaphragm to be compressed between said annular ridge and said first annular rim.