Improved pressure sensor for blood pressure measurement
The described pressure sensor package with a flat-topped housing and flexible gel medium addresses the inaccuracy of MEMS sensors by ensuring accurate pressure transmission from fingers, enabling precise cuffless blood pressure monitoring.
WO2026117732A1PCT designated stage Publication Date: 2026-06-04LMD IP LLC
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- LMD IP LLC
- Filing Date
- 2025-11-26
- Publication Date
- 2026-06-04
AI Technical Summary
Technical Problem
Existing MEMS pressure sensors are not suitable for accurate cuffless blood pressure monitoring due to their concave profile, which leads to inaccurate pressure readings when measuring solid objects like fingers, as they deform and misrepresent arterial pressure.
Method used
A pressure sensor package with a flat-topped housing and a pressure transmitting medium, such as a flexible gel, that ensures accurate transmission of pressure from the finger to the detector, protected by a biocompatible coating, and a MEMS-based pressure detector.
Benefits of technology
Enables precise and durable measurement of blood pressure through direct contact with the finger, providing accurate oscillometric curves and reliable blood pressure estimation.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure US2025057347_04062026_PF_FP_ABST
Abstract
A sensor assembly for measuring blood pressure, the sensor assembly includes one or more photoemitters, one or more photoreceptors, and a pressure sensor module. The pressure sensor module includes a housing that includes a top surface, a well within the housing, a force detector inside the well and a pressure transmitting medium surrounding the force detector in the well. The pressure transmitting medium is filled to a level that is approximately flush with the top surface of the housing.
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