scholarly journals Development of equations for converting random-zero to automated oscillometric blood pressure values

2019 ◽  
Vol 4 ◽  
pp. 146
Author(s):  
Li Yan ◽  
Xiaoxiao Wen ◽  
Alan R. Dyer ◽  
Haiyan Chen ◽  
Long Zhou ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Linear Regression ◽  
Blood Pressure Measurement ◽  
The Other ◽  
Pressure Measurements ◽  
Age And Gender ◽  
Several Variables ◽  
Oscillometric Device ◽  
And Gender ◽  
Over Time

Background: This study aimed to collect data to compare blood pressure values between random-zero sphygmomanometers and automated oscillometric devices and generate equations to convert blood pressure values from one device to the other. Methods: Omron HEM-907, a widely used automated oscillometric device in many epidemiologic surveys and cohort studies, was compared here with random-zero sphygmomanometers. In total, 201 participants aged 40-79 years (37% men) were enrolled and randomly assigned to one of two groups, with blood pressure measurement first taken by automated oscillometric devices or by random-zero sphygmomanometers. The study design enabled comparisons of blood pressure values between random-zero sphygmomanometers and two modes of this automated oscillometric device (automated and manual), and assessment of effects of measurement order on blood pressure values. Results: Among all participants, mean blood pressure levels were the lowest when measured with random-zero sphygmomanometers compared with both modes of automated oscillometric devices. Several variables, including age and gender, were found to contribute to the blood pressure differences between random-zero sphygmomanometers and automated oscillometric devices. Equations were developed using multiple linear regression after taking those variables into account to convert blood pressure values by random-zero sphygmomanometers to automated oscillometric devices. Conclusions: Equations developed in this study could be used to compare blood pressure values between epidemiologic and clinical studies or identify shift of blood pressure distribution over time using different devices for blood pressure measurements.

scholarly journals Development of equations for converting random-zero to automated oscillometric blood pressure values

2019 ◽  
Author(s):  
Li Yan ◽  
Xiaoxiao Wen ◽  
Alan R Dyer ◽  
Haiyan Chen ◽  
Long Zhou ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Linear Regression ◽  
Blood Pressure Measurement ◽  
The Other ◽  
Pressure Measurements ◽  
Age And Gender ◽  
Several Variables ◽  
Oscillometric Device ◽  
And Gender ◽  
Over Time

AbstractObjectiveThis study aimed to collect data to compare blood pressure values between random-zero sphygmomanometers and automated oscillometric devices and generate equations to convert blood pressure values from one device to the other.MethodsOmron HEM-907, a widely used automated oscillometric device in many epidemiologic surveys and cohort studies, was compared here with random-zero sphygmomanometers. Two hundred and one participants aged 40-79 years (37% men) were enrolled and randomly assigned to one of two groups with blood pressure measurement first taken by automated oscillometric devices or by random-zero sphygmomanometers. The study design enabled comparisons of blood pressure values between random-zero sphygmomanometers and two modes of this automated oscillometric device – automated and manual, and assessment of effects of measurement order on blood pressure values.ResultsAmong all participants, mean blood pressure levels were lowest when measured with random-zero sphygmomanometers compared with both modes of automated oscillometric devices. Several variables, including age and gender, were found to contribute to the blood pressure differences between random-zero sphygmomanometers and automated oscillometric devices. Equations were developed using multiple linear regression after taking those variables into account to convert blood pressure values by random-zero sphygmomanometers to automated oscillometric devices.ConclusionEquations developed in this study could be used to compare blood pressure values between epidemiologic and clinical studies or identify shift of blood pressure distribution over time using different devices for blood pressure measurements.

Abstract P333: National Trends in the Quality of Office Blood Pressure Measurements, 2014-2019

Circulation ◽  
2020 ◽  
Vol 141 (Suppl_1) ◽  
Author(s):  
Kathryn Foti ◽  
Lawrence J Appel ◽  
Kunihiro Matsushita ◽  
Josef Coresh ◽  
G Caleb Alexander ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Clinical Practice ◽  
Pressure Measurement ◽  
Blood Pressure Measurement ◽  
Pressure Measurements ◽  
Hypertension Treatment ◽  
Digit Preference ◽  
Provider Characteristics ◽  
Over Time

Introduction: Clinical practice guidelines emphasize the importance of accurate blood pressure measurement and recording to diagnose and treat hypertension. Trends in terminal digit preference (typically manifest by a terminal digit of ‘0’) have not been examined nationally. The growing use of automated blood pressure devices may have reduced terminal digit preference and improved accuracy over time. Objective: To evaluate trends in terminal digit preference in office blood pressure measurements among adults with hypertension by patient and provider characteristics. Methods: We used IQVIA National Disease and Therapeutic Index (NDTI) data from January 2014 through June 2019. The NDTI is designed to be nationally-representative of all patient visits to office-based physicians and uses a two-stage stratified sampling design to sample ~4,000 physicians per quarter who report information on all patient visits on 2 random workdays. We included all hypertension treatment visits (~60M/year) among adults aged ≥18. We examined trends in the proportion of hypertension treatment visits with recorded systolic (SBP) and diastolic (DBP) blood pressure measurements with a terminal digit ‘0’. The expected percent of blood pressures with ‘0’ is 10% for automated and 20% for manual readings. Results: There was a decrease in the percent of visits with SBP (43.0% to 37.4%) or DBP (44.3% to 38.1%) recordings ending in zero ( Table ). The decrease in percent of SBPs with a terminal zero was similar by patient and provider characteristics, though the percentage of SBPs with a terminal ‘0’ was consistently higher among patients aged ≥60, when SBP ≥140 mmHg, and among cardiologists. Conclusions: Terminal digit preference is common indicating systematic error in blood pressure measurement and recording, despite some improvement over time. This may lead to under- and overtreatment of patients with hypertension. Improving the quality of blood pressure measurement is central to improving hypertension diagnosis and control in clinical practice.

A comparison of CAT Doppler and oscillometric Memoprint machines for non-invasive blood pressure measurement in conscious cats

2005 ◽  
Vol 7 (3) ◽  
pp. 147-152 ◽  
Author(s):  
Rosanne E. Jepson ◽  
Vivien Hartley ◽  
Michael Mendl ◽  
Sarah ME Caney ◽  
David J Gould
Keyword(s):  
Blood Pressure ◽  
Systolic Blood Pressure ◽  
Diastolic Blood Pressure ◽  
Blood Pressure Measurement ◽  
Systemic Hypertension ◽  
Pressure Measurements ◽  
Non Invasive ◽  
Measuring Devices ◽  
Oscillometric Device ◽  
Significant Difference

Indirect blood pressure measurements were compared in 28 conscious cats using Doppler and oscillometric blood pressure-measuring devices. Ten cats were used to compare Doppler measurements between two examiners and 18 cats were used to compare Doppler and oscillometric measurements. The Doppler machine obtained systolic and diastolic blood pressure readings in 100% and 51% of attempts, respectively. With the oscillometric machine, systolic and diastolic blood pressure readings were obtained in 52% of the attempts. With the Doppler, measures of mean systolic blood pressure between two examiners were positively correlated, but there was no correlation for diastolic blood pressure measures. When comparing the results obtained by Doppler and oscillometric machines there was no significant difference between mean systolic blood pressure readings, but the oscillometric machine produced significantly higher estimates of diastolic blood pressure. In both cases, the standard deviations for the oscillometric machine were considerably larger than those for the Doppler machine. The first reading of systolic blood pressure obtained with the Doppler machine was an excellent predictor of the mean of five readings, but this was not so for the oscillometric machine. It took less than 5 min to obtain five readings in 37.5% of cases with the Doppler machine but this was true for only 5% of cases with the oscillometric machine. Two cats with ophthalmological lesions consistent with systemic hypertension were identified. In these two patients, systolic blood pressure measurements were between 200 and 225 mmHg when measured by Doppler, and between 140 and 150 mmHg when measured by the oscillometric machine. This suggests that a lower reference range for normal systolic blood pressure values should be used for the oscillometric device.

Impact of 30- Versus 60-Second Time Intervals Between Automated Office Blood Pressure Measurements on Measured Blood Pressure

Hypertension ◽  
2021 ◽  
Vol 78 (5) ◽  
pp. 1502-1510
Author(s):  
Stephen P. Juraschek ◽  
Anthony M. Ishak ◽  
Kenneth J. Mukamal ◽  
Julia M. Wood ◽  
Timothy S. Anderson ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Clinical Practice ◽  
Linear Regression ◽  
Ambulatory Blood Pressure ◽  
The Other ◽  
Pressure Measurements ◽  
Time Intervals ◽  
Interaction Term ◽  
Automated Office Blood Pressure ◽  
The Relationship

Guidelines recommend 1 to 2 minutes between repeated, automated office-based blood pressure (AOBP) measures, which is a barrier to broader adoption. Patients from a single hypertension center underwent a 3-day evaluation that included a 24-hour ambulatory blood pressure (BP) monitor (ABPM) and one of two nonrandomized, unattended AOBP protocols. Half of the patients underwent 3 AOBP measurements separated by 30 seconds, and the other half underwent 3 BP measurements separated by 60 seconds. All measurements were compared with the average awake-time BP from ABPM and the first AOBP measurement. We used linear regression to assess whether the 30-second protocol was associated with individual or average AOBP measurements or awake-time ABPM and used an interaction term to determine whether interval modified the relationship between AOBP measurements (individual and mean) with awake-time ABPM. Among 102 patients (mean age, 59.2±16.2 years; 64% women; 24% Black), the average awake-time BP was 132.5±15.6/77.7±12.2 mm Hg among those who underwent the 60-second protocol and 128.6±13.6/76.5±12.5 mm Hg for the 30-second protocol. Mean systolic/diastolic BP was lower with the second and third AOBP measurement by −0.5/−1.7 mm Hg and −1.0/−2.3 mm Hg for the 60-second protocol versus −0.8/−2.0 mm Hg and −0.7/−2.7 mm Hg for the 30-second protocol; protocol did not significantly modify these differences. Differences between AOBP measurements (first, second, or third) and awake-time ABPM were nearly identical across protocols. In conclusion, a 30-second interval between AOBP measurements was as accurate and reliable as a 60-second interval. These findings support shorter time intervals between BP measurements, which would make AOBP more feasible in clinical practice.

Abstract P007: Age and Gender Differences in Response to Repeat Blood Pressure Measurement After Brief Rest Period

Circulation ◽  
2019 ◽  
Vol 139 (Suppl_1) ◽  
Author(s):  
Sarina Sachdev ◽  
Hassan Tahir ◽  
Landai Nguyen ◽  
Bassam Omar ◽  
Christopher Malozzi ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Gender Differences ◽  
Pressure Measurement ◽  
Blood Pressure Measurement ◽  
Rest Period ◽  
Age And Gender ◽  
Age And Gender Differences ◽  
And Gender

Abstract P338: Age and Gender Differences in Response to Repeat Blood Pressure Measurement after Brief Patient Rest Period

Circulation ◽  
2013 ◽  
Vol 127 (suppl_12) ◽  
Author(s):  
Keerthana Karumbaiah ◽  
Bassam A Omar
Keyword(s):  
Blood Pressure ◽  
Pressure Measurement ◽  
Blood Pressure Measurement ◽  
Measurement Data ◽  
Rest Period ◽  
The Elderly ◽  
Age And Gender ◽  
Significant Difference ◽  
Cardiology Clinic ◽  
And Gender

Background: Office-based blood pressure (BP) measurement is a snapshot of a patient’s ambulatory BP, and is subject to variations which may influence management. Objective: To assess the effect of age and gender on repeat BP measurement after a brief rest period in an outpatient cardiology clinic. Methods: Patient charts reviewed in University-based cardiology clinic identified 170 encounters which contained BP re-measurement data due to elevated initial BP of > 130/80 mmHg. BP was measured initially by a nurse, with the patient in a sitting position and the arm resting at the level of the heart. If BP was > 130/80 mmHg, it was repeated by physician after resting the patient for 15 minutes. There were 86 males (51%) and 84 females (49%); 113 (66%) elderly patients ≥ 60 years of age and 57 (34%) younger patients < 60 years of age. Results: Among all encounters, after a brief rest period, initial systolic BP (SBP) of 153 ± 27 mmHg decreased to 145 ± 27 mmHg (decrease of 8 mmHg; P = 0.003), and initial diastolic BP (DBP) of 87 ± 16 mmHg decreased to 83 ± 15 mmHg (decrease of 4 mmHg; P = 0.04). SBP decreased by 8 mmHg in both males (from 156 ± 30 to 148 ± 27 mmHg) and females (from 151 ± 23 to 143 ± 14) (NS, males versus females). DBP decreased by 5 mmHg in males (from 91 ± 18 to 86 ± 18 mmHg) and by 2 mmHg in females (from 83 ± 12 to 81 ± 12 mmHg) (P = 0.04, males versus females). SBP decreased by 11 mmHg in elderly (from 154 ± 23 to 143 ± 15 mmHg) and 2 mmHg in the young (from 153 ± 33 to 151 ± 30 mmHg) (P=0.02, old versus young). DBP decreased by 3 mmHg in elderly (from 82 ± 12 to 79 ± 12 mmHg) and 4 mmHg in the young (from 97 ± 18 to 93 ± 17 mmHg) (NS, old versus young). Discussion: Hypertension is a challenging public health problem. JNC 7 guidelines recommend that prior to BP measurement, patient should be seated quietly for at least 5 minutes in a chair, with feet on the floor, and arm supported at heart level. This resulted in a significant decrease in BP in our patients. In this study we show that while males and females decrease their systolic BP to the same extent after a brief rest period, males have a greater drop in their diastolic BP than females. Moreover, after the rest period, patients ≥ 60 years of age drop their systolic BP greater than patients < 60 years of age, while there was no significant difference in the drop of their diastolic BP. Given the high reported prevalence of White-coat hypertension in the elderly, between 15% and 25%, this is a clinically significant observation that reinforces that physicians should remeasure the blood pressure, especially the subset of males and the elderly, in whom a bigger decrement may be detected in blood pressure measurement after a brief rest period.

scholarly journals Blood pressure measurement by oscillometric and auscultatory methods in normotensive pregnant women

2019 ◽  
Vol 72 (suppl 3) ◽  
pp. 162-169
Author(s):  
Estefanie Siqueira Vigato ◽  
José Luiz Tatagiba Lamas
Keyword(s):  
Blood Pressure ◽  
Pregnant Women ◽  
Diastolic Blood Pressure ◽  
Blood Pressure Measurement ◽  
Ethics Committee ◽  
Pressure Measurements ◽  
Cross Sectional ◽  
Oscillometric Device ◽  
Quasi Experimental ◽  
Cuff Width

ABSTRACT Objective: to compare blood pressure values obtained by auscultatory and oscillometric methods in different gestational periods, considering cuff width. Method: it is a cross-sectional and quasi-experimental study approved by the Research Ethics Committee. The sample consisted of 108 low-risk pregnant women. Blood pressure measurements were performed in gestational periods of 10-14, 19-22 and 27-30 weeks. Results: The oscillometric device presented values similar to the auscultatory method in systolic blood pressure, but overestimated diastolic blood pressure. Underestimation of blood pressure occurred when using the standard width cuff rather than the correct width cuff in both measuring methods. Conclusion: Verification of brachial circumference and use of adequate cuffs in both methods are indispensable to obtain reliable blood pressure values in pregnant women. We recommend performance of additional studies to evaluate diastolic blood pressure overestimation by the Microlife 3BTO-A.

Developing waist circumference, waist-to-height ratio percentile curves for Pakistani children and adolescents aged 2–18 years using Lambda-Mu-Sigma (LMS) method

2020 ◽  
Vol 33 (8) ◽  
pp. 983-993 ◽  
Author(s):  
Muhammad Asif ◽  
Muhammad Aslam ◽  
Saima Altaf ◽  
Sajid Mustafa
Keyword(s):  
Waist Circumference ◽  
Central Obesity ◽  
The Other ◽  
Height Ratio ◽  
Age And Gender ◽  
Percentile Curves ◽  
Lms Method ◽  
Waist To Height Ratio ◽  
And Gender ◽  
Gender Specific

AbstractObjectivesChildren from different countries and with different ethnic backgrounds have a distinct pattern of central fat deposition. Therefore, it is essential to develop population-specific percentiles of waist circumference (WC), waist-to-height ratio (WHtR) and waist-to-height ratio exponent (WHtR (exp)) for the evaluation of central obesity. The objective of this study was to develop age-and-gender-specific smoothed WC and WHtR percentile curves for the Pakistani children and adolescents aged 2–18 years.MethodsA cross-sectional data-set from a multi-ethnic anthropometric survey was considered. A sample of 10,668 healthy subjects (boys = 51.92%; and girls = 48.08%), aged 2–18 years was studied. Height (cm) and WC (cm) of each subject was measured under standard procedure and WHtR & WHtR (exp) were calculated. Age-and-gender-specific smoothed curves were obtained using the lambda-mu-sigma (LMS) method and compared with percentile curves obtained from different countries.ResultsExcept few early ages, the WC values increased with age in both sexes. Both boys and girls had approximately similar WC during 6–11 years of age and after age of 11, the boys had larger WC than the girls had. For WHtR, the centile curves showed a continuous decrease by 16 years of age and then increased gradually. WHtR of the girls in various ages were having similar or higher than those of the boys. In comparison of WC 50th and 90th percentiles with other countries, it was found that except few ages, the Pakistani children had larger WC than the other reference populations and the results of WHtR were also comparable to the other nations.ConclusionsWe present new reference data of WC, WHtR and WHtR (exp) using a representative sample of the Pakistani children aged 2–18 years. These reference values can be used provisionally for early detection of central obesity and its associated risks in the Pakistani children.

scholarly journals Heritability of the metabolic syndrome and its components in the Tehran Lipid and Glucose Study (TLGS)

2012 ◽  
Vol 94 (6) ◽  
pp. 331-337 ◽  
Author(s):  
MARYAM ZARKESH ◽  
MARYAM SADAT DANESHPOUR ◽  
BITA FAAM ◽  
MOHAMMAD SADEGH FALLAH ◽  
NIMA HOSSEINZADEH ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Hdl Cholesterol ◽  
Age And Gender ◽  
The Metabolic Syndrome ◽  
Biological Parents ◽  
Heritability Estimation ◽  
Low Hdl ◽  
And Gender ◽  
Continuous Traits

SummaryGrowing evidence suggests that metabolic syndrome (MetS) has both genetic and environmental bases. We estimated the heritability of the MetS and its components in the families from the Tehran Lipid and Glucose Study (TLGS). We investigated 904 nuclear families in TLGS with two biological parents and at least one offspring (1565 parents and 2448 children), aged 3–90 years, for whom MetS information was available and had at least two members of family with MetS. Variance component methods were used to estimate age and sex adjusted heritability of metabolic syndrome score (MSS) and MetS components using SOLAR software. The heritability of waist circumference (WC), HDL-cholesterol (HDL-C), triglycerides (TGs), fasting blood sugar (FBS), systolic blood pressure (SBP) and diastolic blood pressure (DBP) as continuous traits after adjusting for age and gender were 27, 46, 36, 29, 25, 26 and 15%, respectively, and MSS had a heritability of 15%. When MetS components were analysed as discrete traits, the estimates of age and gender adjusted heritability for MetS, abdominal obesity, low HDL-C, high TG, high FBS and high blood pressure (BP) were 22, 40, 34, 38 and 23%, respectively (P < 0·05). Three factors were extracted from the six continuous traits of the MetS including factor I (BP), factor II (lipids) and factor III (obesity and FBS). Heritability estimation for these three factors were 7, 13 (P < 0·05) and 2%, respectively. The highest heritability was for HDL-C and TG. The results strongly encourage efforts to identify the underlying susceptibility genes.

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