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1. (WO2018042366) SYSTEMS AND METHODS FOR NON-INVASIVE MEASUREMENT OF CASSETTE PRESSURE

Pub. No.:    WO/2018/042366    International Application No.:    PCT/IB2017/055243
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Fri Sep 01 01:59:59 CEST 2017
IPC: A61M 1/00
G01L 9/00
Applicants: NOVARTIS AG
Inventors: EKVALL, Johan
ESSEX, Paul J.
TODD, Kirk
Title: SYSTEMS AND METHODS FOR NON-INVASIVE MEASUREMENT OF CASSETTE PRESSURE
Abstract:
A method and system provide a surgical system including a cassette, a console and an interferometric pressure sensing system coupled with the console. The cassette is for exchanging material with a patient and includes a wall and a reflector. The wall undergoes a deflection in response to a nonambient internal cassette pressure. The console is coupled with the cassette. The interferometric pressure sensing system is coupled with the console. The interferometric pressure sensing system includes a light source and a detector. The light source provides a first portion of light that is reflected off of the reflector and a second portion of light that bypasses the reflector. The first portion and the second portion of light are recombined to form an interference pattern. The deflection corresponds to a shift in the interference pattern detectable by the detector.