Patent ID: 7744573

Claim:
A medical system for fluid sampling and pressure monitoring of a fluid system of a patient, comprising: a conduit line with a proximal segment adapted to be supplied with a physiological fluid and a distal segment adapted to be in communication with a fluid system of a patient; a control valve with a manifold defining an interior chamber, the manifold having a proximal port fluidly connected to the proximal segment, a distal port fluidly connected to the distal segment, and at least one reservoir port, wherein each of the manifold ports opens to the interior chamber, a pressure transducer connected to the conduit line for sensing the pressure of the fluid therein; a fluid sampling port in the medical system; a reservoir in fluid communication with the at least one reservoir port of the control valve manifold; the control valve further including a valve member movable within the interior chamber and having a plurality of channels therein that selectively communicate with the manifold ports, wherein the plurality of channels comprises a first fluid path and a second fluid path, wherein the first fluid path is separate from the second fluid path, the valve member being movable into at least two positions: a first position that provides open fluid communication from the proximal segment to the patient through the control valve so as to eliminate any dead spaces therein, wherein the first fluid path provides an open fluid passage from the proximal port to one of the at least one reservoir ports, wherein the second fluid path provides an open fluid passage from the distal port to one of the at least one reservoir ports, and wherein reduced pressure within the reservoir pulls fluid from the distal segment through the control valve and into the reservoir sufficient to draw fluid from the fluid system of the patient past the sampling port, and a second position that provides open fluid communication from the proximal segment to the proximal port and through the first fluid path in the valve member to the distal segment, and wherein the proximal segment and distal segment are not in fluid contact with the reservoir and second fluid path and sampling port, such that the pressure of fluid within the conduit line exclusive of the reservoir can be sensed by the pressure transducer.