Title:
DRIFT COMPENSATION FOR IMPLANTED CAPACITANCE-BASED PRESSURE TRANSDUCER
Document Type and Number:
WIPO Patent Application WO/2014/076620
Kind Code:
A3
Abstract:
A method includes, in a living organ (28) in which an ambient pressure varies as a function of time, sensing the ambient pressure using a pressure sensor (36, 90, 174), which has a capacitance that varies in response to the ambient pressure, so as to produce a time-varying waveform. A calibration voltage, which modifies the capacitance and thus the time-varying waveform, is applied to the pressure sensor. The time-varying waveform is processed so as to isolate and measure a contribution of the calibration voltage to the waveform. A dependence of the capacitance on the ambient pressure is calibrated using the measured contribution of the calibration voltage.
More Like This:
| WO/1995/012351 | FETAL PROBE |
| JP2019534767 | Modular ultrasound-enabled artificial cranial prosthesis |
| WO/2001/050951 | APPARATUS AND METHOD FOR CONTINUOUS MEASUREMENT OF PORTAL BLOOD PRESSURE |
Inventors:
GOLDSHTEIN OREN (IL)
LIVNE SHMUEL (IL)
LIVNE SHMUEL (IL)
Application Number:
PCT/IB2013/060038
Publication Date:
July 24, 2014
Filing Date:
November 10, 2013
Export Citation:
Assignee:
VECTORIOUS MEDICAL TECHNOLOGIES LTD (IL)
International Classes:
A61B5/03; A61B5/0215; G01L7/00; G01L9/12; G01L25/00
Domestic Patent References:
| WO2012078861A2 | 2012-06-14 |
Foreign References:
| US20110040206A1 | 2011-02-17 | |||
| US20090036754A1 | 2009-02-05 | |||
| US20050088184A1 | 2005-04-28 | |||
| US20110021887A1 | 2011-01-27 | |||
| US20020045921A1 | 2002-04-18 | |||
| US20090013791A1 | 2009-01-15 | |||
| US20130233086A1 | 2013-09-12 | |||
| US5493470A | 1996-02-20 |
Other References:
DAI ET AL.: "Capacitive Micro Pressure Sensor Integrated with a Ring Oscillator Circuit on Chip", SENSORS, vol. 9, 1 January 2009 (2009-01-01), pages 10158 - 10170, XP055263500
Attorney, Agent or Firm:
D. KLIGLER I.P. SERVICES LTD. (61576 Tel Aviv, IL)
Download PDF: