Kinking-Proof Blood Pressure Cuff Shell for Accurate Sensing
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Solution Overview
Problem
Blood pressure measuring systems suffer from wrinkles or kinks at the compression acting surface of the fluid bag, leading to subcutaneous bleeding and negatively affecting measurement accuracy.
Innovation Solution
A kinking-proof shell is positioned between the pressurization means and the body part, preventing wrinkles and ensuring sufficient stiffness without additional stiffening elements, allowing the pressure sensor unit to measure with high accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a cushion material is accommodated between the compression acting surface of the fluid bag and the measuring site to prevent subcutaneous bleeding, then subcutaneous bleeding is avoided, but measurement accuracy deteriorates due to absorption and attenuation of arterial pressure
Solution Approach 1:
The patent introduces a kinking-proof shell as an intermediary component positioned between the fluid bag and the body part. This shell prevents direct contact between the fluid bag and skin, eliminating the need for cushion materials that would attenuate pressure signals. The shell acts as a mediator that protects the skin from wrinkles and kinks while allowing accurate pressure transmission to the measuring site.
Solution Approach 2:
The system is segmented into distinct functional components: the fluid bag for pressure generation, the kinking-proof shell for structural support and skin protection, and the measuring site for signal detection. This segmentation allows each component to perform its specific function optimally without interfering with others, particularly preventing the cushion material from absorbing pressure signals.
2Device complexity
If wrinkles or kinks are formed at the compression acting surface of the fluid bag during blood pressure measurement, then the system structure is simple, but subcutaneous bleeding occurs and measurement accuracy deteriorates
Solution Approach 1:
The kinking-proof shell serves as a pre-established protective structure that prevents wrinkles and kinks from forming in the first place. By providing this rigid protective layer before measurement, the system avoids skin damage and signal attenuation without requiring complex active control mechanisms during measurement.
Solution Approach 2:
The patent changes the structural parameter of the system by introducing a rigid kinking-proof shell with specific mechanical properties (high stiffness, resistance to deformation). This parameter change transforms the fluid bag from a flexible structure prone to wrinkling into a supported structure that maintains its shape and prevents skin damage while preserving pressure signal integrity.
3Measurement precision
If a kinking-proof shell is positioned between the pressurization means and the body part to prevent wrinkles, then measurement accuracy is enhanced and subcutaneous bleeding is avoided, but device complexity increases
Solution Approach 1:
The kinking-proof shell performs multiple functions simultaneously: it provides structural support to prevent wrinkles and kinks, protects the skin from direct contact with the fluid bag, maintains the geometric shape of the pressure cuff, and enables accurate pressure transmission. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in overall device complexity.
Solution Approach 2:
The kinking-proof shell is designed as a thin-walled rigid structure that provides necessary mechanical support while remaining relatively lightweight and compact. This design approach minimizes the added complexity and bulk of the shell, making it an efficient addition to the blood pressure measurement system.
Data Source
AI summary
The present invention refers to a blood pressure measuring system (10) configured to surround a patient's body part (E), comprising pressurization means (12, 14) for applying pressure to the body part (E), and comprising a kinking-proof shell (20; 30), wherein the kinking-proof shell (20; 30) is arranged so as to be located between the pressurization means (12, 14) and the body part (E), when the blood pressure measuring system (10) surrounds the body part (E). The present invention further refers to a method of applying a blood pressure measuring system (10).