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Fingerstall with decoupled sensor and capsule and associated method

A technology of optical sensors and capsules, which is applied in the fields of sensors, medical science, and diagnosis, and can solve problems such as unstable contact and lower potential accuracy of blood pressure measurement

Pending Publication Date: 2022-06-07
EDWARDS LIFESCIENCES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the current finger cuff design, under the current light source and sensor pair and capsule design structure, will lead to unstable contact between the light source and sensor pair and the patient's finger, requiring frequent calibration, and reducing volume-based Potential Accuracy of Blood Pressure Measurements in Patient with Blomograph

Method used

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  • Fingerstall with decoupled sensor and capsule and associated method
  • Fingerstall with decoupled sensor and capsule and associated method
  • Fingerstall with decoupled sensor and capsule and associated method

Examples

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Embodiment Construction

[0016] Examples of the present disclosure relate to a finger cuff in which a capsule is decoupled from a light source and sensor pair. As mentioned earlier, one problem with today's cuffs is that the capsule is structurally connected to the light source and sensor pair such that as pressure is applied and the capsule is inflated, the light source and sensor pair (eg, LED-PD pair) ) is pushed away from the finger, loses close contact with the finger, and changes position from the initial finger contact position, and then requires calibration. Because of this, calibration algorithms (eg, Physiocal algorithms) are often used to obtain better plethysmography by gradually increasing the pressure on the balloon and measuring the plethysmograph signal strength, and then applying this optimal pressure to the balloon device signal. Unfortunately, the current finger cuff design, with the current light source and sensor pair and capsule design structure, can result in unstable contact b...

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Abstract

A fingerstall connectable to a finger of a patient is disclosed for measuring blood pressure of the patient by a blood pressure measurement system using a volumetric forceps method. The fingerstall may include: a plethysmographic oversleeve; a capsule oversleeve; a pair of light sources and optical sensors mounted in the plethysmographic oversleeve, wherein the pair of light sources and optical sensors generates plethysmographic signals from the patient's finger; the capsule body can be arranged in the capsule body oversleeve, and the fingers of the patient abut against the capsule body of the capsule body oversleeve; and a controller. The controller controls the pressure applied by the balloon to the finger of the patient based on measuring the plethysmographic signal received from the light source and the sensor to maintain the plethysmographic signal substantially constant, thereby replicating the blood pressure of the patient to implement the volumetric forceps method and to measure the blood pressure of the patient.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims the benefit of US Provisional Patent Application No. 62 / 926,852, filed October 28, 2019, the entire contents of which are incorporated herein by reference. technical field [0003] Embodiments of the present invention generally relate to non-invasive blood pressure measurement. More specifically, embodiments relate to a finger cuff for measuring a patient's blood pressure by a blood pressure measurement system utilizing a volume clamp method, wherein the finger cuff utilizes a sensor and a balloon that are decoupled from each other. Background technique [0004] Volume clamp is a technique for non-invasively measuring blood pressure in which pressure is applied to the patient's finger in such a way that the arterial pressure can be balanced by a time-varying pressure to keep the arterial volume constant. In a properly installed and calibrated system, the time-varying pressure applied is approxim...

Claims

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Application Information

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IPC IPC(8): A61B5/022A61B5/0225A61B5/024A61B5/00
CPCA61B5/02241A61B5/02255A61B5/02422A61B5/6826A61B5/6831A61B5/6832
Inventor J·S·李
Owner EDWARDS LIFESCIENCES CORP
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