Blood Pressure Cuff Electrode Contact Control
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Solution Overview
Problem
Existing blood pressure measurement devices often fail to obtain reliable electrocardiographic measurements due to improper contact between electrodes and the measurement site, leading to suboptimal results.
Innovation Solution
A measurement device that includes a pressure acquisition unit, a cuff pressure control unit to maintain pressure during specific steps, a blood pressure calculation unit, and an electrocardiographic measurement unit, which ensures proper contact of electrodes with the skin by maintaining pressure in the cuff during the pressurized state maintaining step, allowing for accurate electrocardiogram measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pair of electrodes is provided for electrocardiographic measurement, then electrocardiogram measurement capability is added, but reliable measurement cannot be obtained when electrodes are not in proper contact with the skin
Solution Approach 1:
The pressing cuff is pressurized before electrocardiogram measurement to ensure proper contact between electrodes and skin. The cuff is inflated to a predetermined pressure level that applies sufficient force to press the electrodes against the skin surface, establishing reliable electrical contact before the measurement process begins.
Solution Approach 2:
The pressure parameter of the pressing cuff is changed and maintained at a specific level during electrocardiogram measurement. By controlling the cuff pressure to be maintained at a predetermined value, the system ensures consistent electrode-skin contact pressure, which is critical for obtaining reliable electrocardiographic signals.
2Reliability
If the pressing cuff is pressurized to ensure electrode contact, then electrode contact reliability is improved, but blood pressure measurement requires pressurizing and depressurizing cycles
Solution Approach 1:
The electrocardiogram measurement is merged with the pressurized state maintaining step of the blood pressure measurement process. By performing electrocardiogram measurement during the period when the cuff pressure is being maintained, the system utilizes the same pressurized state for both ensuring electrode contact and enabling blood pressure measurement, thereby eliminating the need for separate measurement time.
3Measurement precision
If the pressurized state maintaining step duration is extended to ensure proper electrode contact, then electrocardiogram measurement quality is improved, but the overall measurement process takes longer
Solution Approach 1:
The cuff pressure parameter is optimized to a predetermined level that provides sufficient contact force for reliable electrocardiogram measurement within a reasonable time frame. By carefully selecting and maintaining the pressure at this optimal value, the system achieves high measurement quality without requiring excessive duration of the pressurized state maintaining step.
Data Source
AI summary
A measurement device includes a pressure acquisition unit configured to acquire pressure information representing pressure in a pressing cuff, a cuff pressure control unit configured to control, based on the pressure information, the pressure in the pressing cuff during each of a pressurizing step of pressurizing the pressing cuff, a pressurized state maintaining step of maintaining the pressing cuff in a pressurized state after end of the pressurizing step, and a depressurizing step of depressurizing the pressing cuff after end of the pressurized state maintaining step, a blood pressure calculation unit configured to calculate a blood pressure of a user based on the pressure information, and an electrocardiographic measurement unit configured to measure an electrocardiogram of the user during the pressurized state maintaining step.