Thermal Cover for Cuff Blood Pressure Accuracy
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Solution Overview
Problem
Cuff blood pressure measurements are prone to inaccuracies due to various factors including patient habits, measurement conditions, equipment issues, and administrative errors, leading to inappropriate management decisions and the white-coat effect, which can result in significant blood pressure classification errors.
Innovation Solution
The use of a cover for the BP measurement cuff and/or the person's upper extremity, made of flexible materials such as fabric blankets or thermo-regulated materials, to maintain thermal comfort during measurements, thereby stabilizing cuff BP readings by reducing thermoregulation responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the patient's upper extremity is exposed to low ambient temperature during cuff BP measurement, then the measurement procedure can be performed, but thermal discomfort triggers thermoregulation responses that cause BP measurement inaccuracy
Solution Approach 1:
A cover made of thermally insulating material is introduced as an intermediary between the patient's upper extremity and the cold ambient environment. This cover maintains thermal comfort during the measurement procedure, preventing thermoregulation responses that would otherwise cause BP measurement inaccuracy, while allowing the measurement to proceed normally
2Measurement precision
If the measurement duration is extended to accommodate multiple BP measurements, then more accurate average BP can be obtained, but prolonged exposure to cold temperature increases thermal discomfort and measurement error
Solution Approach 1:
The thermally insulating cover is applied before the measurement sequence begins, providing preemptive thermal protection. This beforehand cushioning against cold temperature exposure allows the measurement procedure to be extended for multiple readings without increasing thermal discomfort or measurement error
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The thermal comfort provided by the cover reduces the magnitude and speed of thermoregulation responses, leading to more accurate and stable cuff blood pressure measurements, thereby improving the accuracy of systolic, diastolic, and mean arterial pressure readings.
Implementation Method 1
The embodiments of the present invention use a cover for a BP measurement cuff and/or a person's upper extremity that wears the BP measurement cuff to improve the person's thermal comfort during a cuff BP measurement
Implementation Method 2
The thermal comfort provided by the cover reduces the magnitude and speed of thermoregulation responses, leading to more accurate and stable cuff blood pressure measurements
Data Source
AI summary
An inaccurate blood pressure (BP) measurement can result if a person is not thermally comfortable during a cuff BP measurement. For example, an inaccurate BP measurement can result if a person feels cold when his or her upper extremity that wears the BP measurement cuff is exposed to a low ambient temperature during a BP measurement. Although a person can wear thermally comfortable clothing, the person's upper extremity must be exposed to the ambient temperature during a cuff BP measurement. A cover, such as a fabric blanket, thermo-regulated blanket, electric blanket, plastic tube, etc., for a BP measurement cuff and/or for a person's upper extremity that wears the BP measurement cuff can improve the person's thermal comfort and can stabilize cuff BP measurements. In addition, warm or cool conditioned air with an appropriate level of humidity can be introduced into the cover to make the person even more thermally comfortable.