Patent ID: 8062214
Filing Date: 2011-11-22
Classification: A61B

Abstract:
1. A surgical system comprising: a first instrument defining a fluid flow channel; a second instrument receivable by the first instrument fluid flow channel; and a valve coupled to the first instrument and configured to control fluid flow through the first instrument channel, wherein the valve is configured such that impedance to fluid flowing through the valve and the first instrument channel is substantially the same without the second instrument received in the first instrument channel and with the first instrument channel partially blocked by the second instrument such that the first instrument channel is limited to a region between the first and second instruments, and wherein the valve comprises a housing and a body within the housing, the body defining an opening therein and being moveable relative to the housing between a first position in which the opening and the first instrument channel define a first fluid flow path having a first impedance and a second position in which the opening is arranged to receive the second instrument therethrough such that the opening and the first instrument channel define a second fluid flow path that has a second impedance substantially equal to the first impedance.