NON-INVASIVE CARDIOVASCULAR MONITORING DEVICE

摘要

A cardiovascular monitoring system includes a sensor assembly and a controller. The sensor assembly includes a membrane enclosing a viscous fluid, a substrate immersed in the viscous fluid, and at least one strain gauge mounted with the substrate. The strain gauge is configured to detect bending of the substrate due to changes in capillary blood pressure of a person in contact with the membrane at less than 50 mmHg contact pressure and to output a signal indicative of the changes. The controller may be configured to output a change in mean arterial pressure of the person based on a profile of the signal that is associated with a heartbeat of the person. Also, the controller may be configured to output the mean arterial pressure based on a weight signal indicative of a weight of the person and the profile of the signal associated with the heartbeat.

主权项

1. A blood pressure sensor assembly comprising:
a membrane having a surface configured for contact with a body of a patient; a liquid surrounded by the membrane and having a viscosity greater than 0.008 Poise; a substrate immersed in the liquid; and a strain gauge mounted with the substrate such that changes in a contact pressure between the membrane and body due to changes in blood pressure associated with the body result in flexion of the substrate and changes in an output signal of the strain gauge.