Blood Pressure Monitor Pulse Period Threshold
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Solution Overview
Problem
Existing blood pressure measurement devices fail to accurately determine whether a patient is in a rest condition during measurement due to individual variations in pulse rate and pulse period, and do not adequately consider environmental and temporal factors, leading to potentially inaccurate readings.
Innovation Solution
A blood pressure measurement device that measures and compares the patient's current pulse period with past measurements, using a threshold value calculated based on individual data and accounting for time zone, day of week, season, and environmental temperature, to determine if the patient was in a rest or unrest condition during measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the patient's pulse period is compared with a general or standard value to determine rest condition, then the determination process is simple, but the accuracy is low due to individual variations in pulse period
Solution Approach 1:
The patent creates a personalized reference profile by copying and storing the patient's historical pulse period data in memory. Instead of using a general standard value, the system compares current pulse period measurements against the patient's own historical data pattern, effectively creating an individualized baseline that accounts for their unique physiological characteristics.
Solution Approach 2:
The system continuously monitors and stores pulse period data from previous measurements, using this historical feedback to establish a personalized reference range. The current measurement is then compared against this accumulated feedback data, allowing the system to adapt to the patient's normal variations over time and improve determination accuracy.
2Ease of operation
If the pulse period is measured to determine rest condition, then the measurement process is straightforward, but the reliability is reduced due to influences from time zone, day of week, season, and environmental temperature
Solution Approach 1:
The system performs preliminary actions by recording and storing various environmental and temporal parameters (time zone, day of week, season, temperature) along with the pulse period measurements. This preliminary data collection allows the system to later compare current conditions against historical patterns, accounting for known external influences before making the rest condition determination.
Solution Approach 2:
The patent acknowledges and accommodates parameter changes by storing pulse period data across different environmental and temporal conditions. The system understands that pulse period naturally varies with time zone, day of week, season, and temperature, and uses this knowledge to properly interpret measurements within the context of these changing parameters.
3Productivity
If a fixed threshold value is used to determine rest/unrest condition, then the determination is quick and simple, but the accuracy decreases because it does not account for individual variations and environmental factors
Solution Approach 1:
The system transitions from a static, fixed threshold approach to a dynamic determination method. Instead of using a constant value, the system calculates a personalized threshold range based on the patient's historical pulse period data and current environmental conditions. This dynamic threshold adapts to each patient's unique physiological baseline and external influences, maintaining both speed and accuracy.
Solution Approach 2:
The patent implements parameter changes by calculating the threshold value dynamically based on stored historical pulse period data and current environmental parameters. The threshold is not fixed but is adjusted according to the patient's individual patterns and the specific measurement conditions, thereby improving accuracy without significantly increasing the time required for determination.
Data Source
AI summary
A blood pressure measurement device measures a pulse period of a patient and includes a memory, a threshold calculation section, a rest/unrest condition determination section, and a display unit. The memory stores data of the measured pulse period and data of a pulse period of past measurement of the patient. The threshold calculation section calculates a threshold value range based on the data of the pulse period of the past measurement of the patient. The rest/unrest condition determination section determines whether the patient was under the rest condition or the unrest condition during blood pressure measurement by comparing the measured pulse period with the threshold value range. The display unit displays the blood pressure measured and whether the blood pressure was measured when the patient was in the rest condition or the unrest condition.