Patent ID: 8215157
Filing Date: 2012-07-10
Classification: A61M,G01N

Abstract:
1. A medical fluid delivery system for determining viscosity of a fluid, the system comprising: a fluid flow path for communicating between a source and a patient: a fixed flow restriction in the fluid flow path; a flow valve operatively associated with the fluid flow path upstream of the fixed flow restriction, such valve being movable between a first position, which allows fluid flow through the path, and a second position, which limits fluid flow through the fluid flow path; and a control module operatively associated with the fluid flow path for sensing a fluid pressure difference within the fluid flow path at a selected location upstream of the flow restriction when the valve moves from the first position to the second position and for determining viscosity of the fluid based at least in part on such fluid pressure difference; and wherein the fluid pressure difference is measured during movement of the valve from the first position to the second position, and the second position includes stopping fluid flow through the fluid flow path upstream of such selected location.