Patent ID: 8702620

Claim:
A monitoring system for use with a body of a subject, the system comprising: a medical device, having a portion thereof configured to be placed inside the subjects body, said portion of the medical device being configured to be propelled by fluid pressure through a body lumen; at least first and second pressure sensors configured to be accommodated remotely from the subjects body at two different spaced-apart positions outside the subjects body and configured and operable to detect pressure at the two spaced-apart remote positions, respectively; said pressure sensors configured to be in fluid communication with at least one site inside the subject's body; at least one tubular member having a distal end connected to the first pressure sensor and a proximal end connected to the second pressure sensor; said tubular member being configured and operable as a flow resistor and selected to have a first characteristic resistance to fluid flow; first and second pressure sensors measuring a pressure gradient across the tubular member; a distal flow path extending between the tubular member and the medical device and exhibiting a second characteristic resistance to fluid flow; and a control unit for monitoring and regulating fluid pressure at said at least one site, said control unit utilizing a model based upon a ratio between the first characteristic resistance and the second characteristic resistance to generate an output indicative of the pressure at the at least one site.