Sphygmomanometer Variable Remeasurement Timing for Nighttime Monitoring
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Solution Overview
Problem
Conventional sphygmomanometers face challenges in accurately measuring nighttime blood pressure due to phenomena like changes in sleep state, irregular pulse waves, posture changes, and body motion, leading to potential measurement errors and either unnecessary delays or incorrect readings when remeasuring blood pressure.
Innovation Solution
A sphygmomanometer with a nighttime blood pressure measurement mode that automatically starts measurements according to a schedule, includes a storage unit for past blood pressure values, a difference determination unit to assess measurement errors, a phenomenon discrimination unit to identify affecting factors, and a schedule resetting unit to adjust remeasurement times based on detected phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed setting time is used for remeasurement after detecting measurement error, then the measurement process is simple, but the remeasurement timing may be too long or too short depending on the phenomenon occurring in the subject
Solution Approach 1:
The patent applies dynamics by making the remeasurement setting time variable rather than fixed. The schedule resetting unit dynamically adjusts the remeasurement timing based on the type of phenomenon detected in the subject. Different phenomena (body motion, posture change, sleep state change, irregular pulse wave) have different predetermined setting times, allowing the system to adapt the measurement schedule to the specific physiological condition.
2Stability of the object's composition
If the setting time is too long for the phenomenon that has occurred, then the measurement process is stable, but the blood pressure is measured again at a time unnecessarily greatly deviated from the appropriate measurement time
Solution Approach 1:
The patent applies parameter changes by modifying the remeasurement setting time parameter based on the detected phenomenon type. Instead of using a single fixed time value, the system selects from multiple predetermined time parameters (5 minutes for body motion, 10 minutes for posture change, 15 minutes for sleep state change, 20 minutes for irregular pulse wave) to optimize the balance between stability and timing accuracy.
3Productivity
If the setting time is too short for the phenomenon that has occurred, then the remeasurement is performed quickly, but the phenomenon is still continuing and a correct blood pressure value cannot be obtained
Solution Approach 1:
The patent applies feedback by using the phenomenon discrimination unit to detect the type of phenomenon occurring in the subject, then feeding this information back to the schedule resetting unit to adjust the remeasurement timing. This closed-loop feedback mechanism ensures that the remeasurement is scheduled at an appropriate time after the phenomenon has subsided, guaranteeing measurement accuracy while maintaining efficient productivity.
Data Source
AI summary
A sphygmomanometer includes a storage unit that stores a measured blood pressure value. In a nighttime blood pressure measurement mode, blood pressure measurement is automatically started according to a schedule, and a blood pressure is measured when a blood pressure measuring cuff is in a pressurization process or a depressurization process. Further, it is determined whether or not a current blood pressure value measured is different from a past blood pressure value stored in the storage unit beyond an allowable range. When the current blood pressure value is different from the past blood pressure value beyond the allowable range, it is discriminated which phenomenon among a plurality of predetermined types of phenomena has occurred in the subject. A time of remeasurement with respect to a measurement time of the current blood pressure value is variably set according to which phenomenon among the plurality of types of phenomena has occurred.