Wrist Blood Pressure Cuff Alignment Using Belt Position Marks
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Solution Overview
Problem
Existing integral-type blood pressure measurement devices face challenges in aligning the sensing cuff with the desired position on the wrist due to variations in wrist thickness and shape, especially when the device body is positioned on the backhand side.
Innovation Solution
A blood pressure measurement device with a curler that follows the wrist's circumference, a device body on the backhand side, a sensing cuff on the palm-side, and a mark portion on the belt to guide alignment, along with a buckle system for adjustable fit and a resilient insert to maintain cuff alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the device body is disposed on the backhand side of the wrist to reduce size and improve wearability, then the sensing cuff becomes separated from the device body, but it becomes difficult to align the sensing cuff at the desired position facing the artery
Solution Approach 1:
A mark portion is introduced as an intermediary element on the belt to indicate the correct positioning of the sensing cuff. This mark serves as a visual guide that mediates between the separated device body and the sensing cuff, enabling accurate alignment despite their spatial separation on the wrist.
Solution Approach 2:
The mark portion is pre-positioned on the belt at a specific location that corresponds to the desired sensing cuff position. This preliminary marking allows the user to align the sensing cuff correctly before taking the measurement, eliminating the need for complex real-time adjustment.
2Adaptability or versatility
If the sensing cuff is disposed at a position separated from the device body to accommodate wrist thickness variations, then wearability is improved, but alignment precision deteriorates
Solution Approach 1:
The mark portion on the belt acts as a mediator that translates the adaptable positioning of the belt around different wrist thicknesses into precise positioning of the sensing cuff. Regardless of wrist size, the mark indicates where the sensing cuff should be placed to ensure accurate artery coverage.
Solution Approach 2:
The mark portion uses visual contrast (different color or pattern) to clearly indicate the correct positioning area. This visual cue ensures that users can accurately identify and align the sensing cuff position on the belt, maintaining positioning precision across different wrist sizes and shapes.
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
Facilitates easy and accurate alignment of the sensing cuff over the radial and ulnar arteries, ensuring consistent positioning despite wrist thickness variations, enhancing wearability and durability.
Implementation Method 1
detecting the pressure of the cuff using a pressure sensor
Implementation Method 2
detects vibration of the artery wall to measure blood pressure
Data Source
AI summary
A blood pressure measurement device attachable to the wrist includes a curler that curves along a circumferential direction of the wrist from a backhand side of the wrist along one side of the wrist to a region on a palm-side of the wrist where at least an artery resides, a device body provided on the curler on the backhand-side of the wrist, a sensing cuff provided on the curler on the palm-side of the wrist and covers the region where the artery of the wrist resides, a belt configured to cover the curler including a first belt provided on a first side of the device body, a second belt provided on a second side of the device body, and a connector to connect the first belt and the second belt, and a mark portion provided on the belt being configured to guide to a position of the sensing cuff.