A fluid management system and method

摘要

C:WNRPonh[lDCC/CiW/3 1935_ I.DOC-22/11/291 A surgical system includes a first instrument defining a first channel and a second instrument receivable by the first channel. The second instrument defines a second 5 channel. A valve coupled to the first instrument controls fluid flow through the first channel, such that impedance of fluid flow through the first channel is substantially the same without the second instrument received in the first channel and with the first channel partially blocked by the second instrument. In another aspect, a surgical apparatus includes an outer member and an inner member received within the outer member to 10 define a first channel therebetween. The inner member houses an optical lens and defines a second channel for receiving a surgical instrument. The first and second channels are configured such that a pump having an inflow rate of up to about 0.7 L/min connected to the second channel can maintain fluid pressure inside an organ. -20 60 30 -52 22300 5) 400 70 56 116 310 38 33 230 25 - 1123 32 34 74200 10 10 220 . 42 r= 10 '201 34215