scholarly journals Uncertainty in Blood Pressure Measurement Estimated Using Ensemble-Based Recursive Methodology

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2108
Author(s):  
Soojeong Lee ◽  
Hilmi R Dajani ◽  
Sreeraman Rajan ◽  
Gangseong Lee ◽  
Voicu Z Groza
Keyword(s):  
Blood Pressure ◽  
Blood Pressure Measurement ◽  
Measured Quantity ◽  
Home Office ◽  
Medical Centers ◽  
Measure Blood Pressure ◽  
Third Stage ◽  
Blood Pressure Monitors ◽  
A New Technique ◽  
Fine Tune

Automated oscillometric blood pressure monitors are commonly used to measure blood pressure for many patients at home, office, and medical centers, and they have been actively studied recently. These devices usually provide a single blood pressure point and they are not able to indicate the uncertainty of the measured quantity. We propose a new technique using an ensemble-based recursive methodology to measure uncertainty for oscillometric blood pressure measurements. There are three stages we consider: the first stage is pre-learning to initialize good parameters using the bagging technique. In the second stage, we fine-tune the parameters using the ensemble-based recursive methodology that is used to accurately estimate blood pressure and then measure the uncertainty for the systolic blood pressure and diastolic blood pressure in the third stage.

scholarly journals Support Vector Regression-Based Recursive Ensemble Methodology for Confidence Interval Estimation in Blood Pressure Measurements

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Soojeong Lee ◽  
Gangseong Lee
Keyword(s):  
Blood Pressure ◽  
Support Vector Machine ◽  
Confidence Interval ◽  
Interval Estimation ◽  
Absolute Error ◽  
Support Vector ◽  
Measured Quantity ◽  
Pressure Measurements ◽  
Measure Blood Pressure ◽  
A New Technique

The monitors of oscillometry blood pressure measurements are generally utilized to measure blood pressure for many subjects at hospitals, homes, and office, and they are actively studied. These monitors usually provide a single blood pressure point, and they are not able to indicate the confidence interval of the measured quantity. In this paper, we propose a new technique using a recursive ensemble based on a support vector machine to estimate a confidence interval for oscillometry blood pressure measurements. The recursive ensemble is based on a support vector machine that is used to effectively estimate blood pressure and then measure the confidence interval for the systolic blood pressure and diastolic blood pressure. The recursive ensemble methodology provides a lower standard deviation of error, mean error, and mean absolute error for the blood pressure as compared to those of the conventional techniques.

Study on Cuff-Less Blood Pressure Measurement Based on Electrocardiography and Photoplethysmography Signal

2019 ◽  
Vol 2 (3) ◽  
pp. 206-214
Author(s):  
Putri Indes Oktabriani ◽  
Fuad Ughi ◽  
Aulia Arif Iskandar
Keyword(s):  
Blood Pressure ◽  
Pressure Measurement ◽  
Blood Pressure Monitoring ◽  
Blood Pressure Measurement ◽  
Ecg Signal ◽  
Optimum Location ◽  
Blood Pressure Monitor ◽  
Pressure Monitor ◽  
Left Hand ◽  
Measure Blood Pressure

The continuous blood pressure measurement research is widely known for helpingthe development of ambulatory blood pressure monitoring where it measures blood pressureevery 15 to 30 minutes throughout the day. The cuff is a problem for the patient withAmbulatory Blood Pressure Monitor. It can make a person feel uncomfortable and must staystill when the cuff starts to inflate. It is limiting and disturbing their daily activity when thedevice is starting to measure the blood pressure. Blood pressure measurement without cuff isbeing proposed in this research, called cuff-less blood pressure measurement. It will be based onPhotoplethysmography (PPG) and Electrocardiography (ECG) signal analysis. ECG (Lead 1,Lead 2, and Lead 3) with PPG signal produced from index finger on the left hand are comparedand analyzed. Then the relation of PPG and ECG signal and the optimum location for daily usecan be obtained. The optimum location will be based on the electrode’s position that producedthe optimum ECG lead Signal to measure blood pressure. Based on the result, PPG and ECGsignal have a linear relation with Blood Pressure Measurement and Lead 1 is more stable inproducing the ECG signal. The equation from Lead 1 appeared as one of the optimum equationsfor measuring Systolic Blood Pressure (SBP) or Diastolic Blood Pressure (DBP).

scholarly journals How should we measure blood pressure? Implications of the fourth blood pressure measurement in office blood pressure

2020 ◽  
Author(s):  
Annina S. Vischer ◽  
Thenral Socrates ◽  
Clemens Winterhalder ◽  
Jens Eckstein ◽  
Michael Mayr ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Pressure Measurement ◽  
Blood Pressure Measurement ◽  
Office Blood Pressure ◽  
Measure Blood Pressure

Blood Pressure Measurement Error in Children: Lessons in Measurement Reliability

2019 ◽  
Vol 27 (1) ◽  
pp. 114-125 ◽  
Author(s):  
Esther J. Varney ◽  
Ashley M. Van Drunen ◽  
Emily F. Moore ◽  
Kristen Carlin ◽  
Karen Thomas
Keyword(s):  
Blood Pressure ◽  
Measurement Error ◽  
Pressure Measurement ◽  
Blood Pressure Measurement ◽  
Pressure Measurements ◽  
Noninvasive Blood Pressure ◽  
Measure Blood Pressure ◽  
Noninvasive Blood Pressure Measurement ◽  
Manual Blood Pressure ◽  
Acceptable Agreement

Background and PurposeBlood pressure measurement represents the pressure exerted during heart ejection and filling. There are several ways to measure blood pressure and a valid measure is essential. The purpose of this study was to evaluate the approach to noninvasive blood pressure measurement in children.MethodsBlood pressure measurements were taken using the automatic Phillips MP30 monitor and compared against Welch Allyn blood pressure cuffs with Medline manual sphygmomanometers.ResultsA total of 492 measurements were taken on 82 subjects, and they demonstrated comparability between automatic and manual devices.ConclusionsAlthough our study indicated acceptable agreement between automatic and manual blood pressure measurement, it also revealed measurement error remains a concern, with sample size, study protocol, training, and environment all playing a role.

scholarly journals Physiological Impact of Vibration and Noise in an Open-Air Magnetic Resonance Imager: Analysis of a PPG Signal of an Examined Person

Proceedings ◽  
2019 ◽  
Vol 42 (1) ◽  
pp. 14
Author(s):  
Jiří Přibil ◽  
Anna Přibilová ◽  
Ivan Frollo
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Magnetic Resonance ◽  
Acoustic Noise ◽  
Blood Pressure Measurement ◽  
Psychological Impact ◽  
Blood Pressure Monitors ◽  
Instantaneous Heart Rate ◽  
Magnetic Resonance Imaging Mri ◽  
Physiological Impact

The paper represents a preliminary analysis of the physiological and psychological impact of vibration and acoustic noise on a person examined by a low-field magnetic resonance imaging (MRI) tomograph. First, a methodology for the measurement of different signals of a tested person was found. The main investigation consists of a parallel heart rate and blood pressure measurement using a photoplethysmographic (PPG) optical sensor and standard portable blood pressure monitors. The recorded PPG signal is filtered and processed to obtain a clean waveform used to determine an instantaneous heart rate. Different types of portable blood pressure monitors are tested and compared to choose the best one for further experiments.

scholarly journals Comparison of blood pressure in shoulder and femoral area

2021 ◽  
Vol 16 (7-8) ◽  
pp. 57-59
Author(s):  
I.I. Titov ◽  
M.O. Pryjma ◽  
O.Ya. Lukashevskyj
Keyword(s):  
Blood Pressure ◽  
Brachial Artery ◽  
Blood Pressure Measurement ◽  
Significant Discrepancy ◽  
Non Invasive ◽  
Statistical Validity ◽  
Measure Blood Pressure ◽  
Average Blood Pressure ◽  
Promising Area ◽  
The Relationship

Failure to measure blood pressure on the brachial artery forces us to look for other areas to obtain values with non-invasive blood pressure measurement. The femoral area can be regarded as such an alternative. Therefore, establishing the reliability of the relationship between blood pressure values measured in the shoulder and femoral areas is a promising area of research. In this study, blood pressure measurements were carried out at rest in 100 soma-tically healthy students aged 21.0 ± 1.2 years by means of a patient monitor UM-300 (Ukraine) using two standard cuffs for shoulder (25–35 cm) and femoral areas (38–50 cm). The statistical validity of the relationship was determined using the Bland-Altman me-thod, and elements of regression analysis were used. The results of the study showed no significant discrepancy in the data, especially when it came to average blood pressure. A regression model has also been developed, which can serve as valuable information for the algorithmic development of programs for predicting blood pressure in the brachial artery when measuring it in the femoral area. Thus, measuring blood pressure in the femoral artery can be considered an alternative to measuring blood pressure in the shoulder area.

scholarly journals Development of non-occlusive blood pressure monitor with height correction for home used application

2019 ◽  
Vol 14 (2) ◽  
pp. 921
Author(s):  
Agung W. Setiawan ◽  
Nur A. Heryanto ◽  
Fadel M. Putra ◽  
Febri Suyitno ◽  
M. Andre Martin ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Standard Deviation ◽  
Pressure Measurement ◽  
Blood Pressure Measurement ◽  
Pulse Transit Time ◽  
Average Error ◽  
Blood Pressure Monitor ◽  
Pressure Monitor ◽  
Left Hand ◽  
Measure Blood Pressure

<span>Non-occlusive blood pressure measurement method is developed to avoid the use of discontinuous and uncomfortable cuff-based methods. In this research, Pulse Transit Time (PTT) and Photoplethysmogram Intensity Ratio (PIR) is used to measure blood pressure. Two photoplethysmogram (PPG) sensors that are placed on the wrist and one of the finger joints both on the left hand is used to get the PTT and PIR. The name of the device is ARTSEN. During measurement, there is a measurement error caused by the hydrostatic effect when the device position is not inline with the heart. To minimize this error, this research proposes an automatic continuous blood pressure monitor. The device will conduct measurement only when the height of the device is inline with the heart. Accelerometer and gyroscope are used to detect the height of the device. There are 30 subjects that are involved in this research. To evaluate the performance of the device, there are two measurement conditions, during lying in the bed and sit down position. The blood pressure measurement is conducted using ARTSEN and sphygmomanometer (as the gold standard of blood pressure measurement). The average error of systolic blood pressure is 8 mmHg with standard deviation 5 mmHg, and average error of diastolic blood pressure is 8 mmHg with standard deviation 4 mmHg.</span>

scholarly journals Different measures of blood pressure in primary health care in Saudi Arabia

2020 ◽  
Vol 7 (11) ◽  
pp. 4307
Author(s):  
Khaled M. Hassan ◽  
Hadil E. Rahali ◽  
Hisham M. Balamash ◽  
Reem K. Alanazi ◽  
Naief S. Almatroudi ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Primary Care ◽  
Saudi Arabia ◽  
Rural Areas ◽  
Electronic Device ◽  
Blood Pressure Measurement ◽  
Electronic Devices ◽  
Kingdom Of Saudi Arabia ◽  
Cross Sectional ◽  
Measure Blood Pressure

Background: Objective of the study was to be able to know various measurement or devices for blood pressure (BP) used in primary care (PC).Methods: Cross-sectional multicenter study, sample is consecutive cases, study done in kingdom of Saudi Arabia in health institution of Primary care that treat patients who already diagnosed with hypertension aged more than 18 years old, the method used in the study is observation of devices which measure blood pressure through two following BP measurements.Results: Blood pressure was measured for 14,137 from 3,592 PC physicians, blood pressured measured by a mercury sphygmomanometer, in 69.8% of the patients, while it is measured by electronic device in 16.5% but measured by aneroid manometer in 11.8% while 1.9% measured by more of a measurement method. Electronic devices and aneroid manometers were the most used measurement of blood pressure in rural areas. Also, there were differences in the BP values between different methods of the measurement.  Conclusions: The best methods of blood pressure measurement between medical staff is mercury sphygmomanometers and aneroid devices in primary care and to avoid biases in the measurement we encourage to use electronic devices to measure BP.

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