Accuracy of the London School of Hygiene and Remler M2000 sphygmomanometers

1981 ◽  
Vol 61 (s7) ◽  
pp. 399s-401s ◽  
Author(s):  
D. J. Fitzgerald ◽  
W. G. O'Callaghan ◽  
K. O'Malley ◽  
E. T. O'Brien
Keyword(s):  
Blood Pressure ◽  
Pressure Measurement ◽  
Blood Pressure Measurement ◽  
Calibration Error ◽  
London School ◽  
Lower Blood ◽  
Significant Difference ◽  
Blood Pressures ◽  
The Mean ◽  
Selection Of

1. The accuracy of the Remler M2000, a semiautomatic portable blood pressure recorder, was assessed with the London School of Hygiene (LSH) and Hawkesley random-zero sphygmomanometers used as reference standards. 2. The Remler gave higher recordings than the LSH sphygmomanometer, the mean systolic and diastolic differences being 5.9 mmHg (P < 0.001) and 4.7 mmHg (P < 0.001) respectively. No significant difference was demonstrated between paired Remler and Hawkesley recordings. 3. When simultaneous paired LSH and Hawkesley sphygmomanometer recordings were compared, the LSH gave lower blood pressures: 7.1 mmHg (P < 0.001) for systolic and 3.6 mmHg (P < 0.001) for diastolic recordings. 4. The LSH sphygmomanometer underestimates blood pressure, partly due to a calibration error but also because the selection of end points for this device differs from other methods of blood pressure measurement.

Abstract 2742: The Comparison Of Direct Measurement Of Central Blood Pressure And Noninvasive Evaluation By Radial Artery Tonometry.

Circulation ◽  
2007 ◽  
Vol 116 (suppl_16) ◽  
Author(s):  
Kenji Takazawa ◽  
hiroshi kobayashi ◽  
mineko kino ◽  
akira aizawa
Keyword(s):  
Blood Pressure ◽  
Pressure Measurement ◽  
Guide Wire ◽  
Blood Pressure Measurement ◽  
Regression Line ◽  
Aortic Pressure ◽  
Applanation Tonometry ◽  
Central Blood Pressure ◽  
Medical Systems ◽  
Significant Difference

Background and objectives: New devices including radial applanation tonometer have been developed for central blood pressure measurement. The devices can noninvasively calculate the central blood pressure. To investigate the accuracy of estimated central blood pressure, this study demonstrates the comparison of catheter based central blood pressure and radial applatnation tonometer based central blood pressure. Materials and Methods: Seventy two patients (64 ± 10 years old) underwent cardiac catheterization were recruited for this study. Ascending aortic pressure was measured using a pressure guide wire (RADI Medical Systems), and recorded on a laptop personal computer through a SEIREG polygraph (Siemens). Radial arterial pulse waves were simultaneously measured noninvasively using applanation tonometry technique by HEM-9000AI (Omron Healthcare Co.,Ltd.) and SphygmoCor (AtCor Medical Pty Ltd.). The measurements were performed before and after administration of vasodilator (nicorandil or glycerol trinitrate) or antihypertensive (nicardipine hydrochloride) drugs. The central blood pressure calculated by HEM-9000AI (cSBP) and SphygmoCor (aSBP Sphy) was compared respectively with that by catheter (aSBP). Results: cSBP and aSBP Sphy indicated significant correlation with aSBP (r=0.94, 0.93, respectively, p=0.001). The regression line slope of cSBP to aSBP was 0.92 and that of aSBP Sphy to aSBP was 0.76. A significant difference was observed between aSBP and aSBP Sphy, but was not observed between aSBP and cSBP. Bland-Altman test showed that the difference of cSBP to aSBP was - 0.4 ± 9.6 mmHg and that of aSBP Sphy to aSBP was -9.0 ± 10.3 mmHg. It shows significant difference between cSBP to aSBP error and aSBP Sphy to aSBP error (p<0.05). Conclusion: The central blood pressure measured by HEM-9000AI is very close to that by catheter. These findings indicate that noninvasive central blood pressure measurement by radial applanation tonometry is accurate enough for clinical applications.

Use of the common carotid artery in blood pressure measurement in rats. A possible source of error

1980 ◽  
Vol 58 (9) ◽  
pp. 1126-1127 ◽  
Author(s):  
S. C. Pang ◽  
T. M. Scott
Keyword(s):  
Blood Pressure ◽  
Carotid Artery ◽  
Common Carotid Artery ◽  
Pressure Measurement ◽  
Blood Pressure Measurement ◽  
Neck Surgery ◽  
Artery Cannulation ◽  
Blood Pressures ◽  
The Common ◽  
Source Of Error

Comparison of blood pressures obtained by femoral and common carotid artery cannulation has shown that in the rat anaesthetized with Nembutal an increase in blood pressure occurs after neck surgery and common carotid artery cannulation.

scholarly journals COMPARISON OF ANXIETY LEVEL, BLOOD PRESSURE AND PULSE PARAMETERS OF PATIENTS WITH AND WITHOUT CORONARY ANGIOGRAPHY EXPERIENCE: A CROSS-SECTIONAL STUDY

2021 ◽  
Vol 54 (1) ◽  
pp. 107-115
Author(s):  
Yasemin Altınbaş ◽  
Emine Derya Derya Ister
Keyword(s):  
Blood Pressure ◽  
Coronary Angiography ◽  
Trait Anxiety ◽  
Blood Pressure Measurement ◽  
Cross Sectional Study ◽  
Study Data ◽  
Cross Sectional ◽  
Significant Difference ◽  
State And Trait Anxiety ◽  
The Mean

Objective: The study aimed to compare state and trait anxiety, blood pressure, and heart rate of patients with and without coronary angiography experience who undergo coronary angiography intervention. Methodology: This study is cross-sectional comparative research. A total of 160 patients, including 80 patients undergo for the first time coronary angiography and 80 patients with at least one experience of coronary angiography were included in the sample of the study. In the study, data were collected using 'Patient Information Form' and 'State-Trait Anxiety Inventory', blood pressure measurement device, and pulse oximeter. Results: The mean of state anxiety scores of the patients with and without CA experience were 39.35±5.31 and 39.98±4.04, respectively; (p=0.395). The mean of trait anxiety scores of the patients with and without CA experience were 44.73±6.84 and 44.51±6.05, respectively (p=0.826).  There was no statistically significant difference observed in state and trait anxiety between two groups. Before the CA procedure, the systolic and diastolic blood pressure average of the patients with CA experience were statistically higher than those without CA experience (p<0.05). Conclusion: The anxiety levels of the patients before the CA were observed to be similar and moderate, regardless of their CA experience. It was observed that patients with CA experience before CA procedure had higher systolic and diastolic blood pressures compared to the group without experience.

A study of blood pressure in school children between the age of 6-12 years in Chennai, India: a cross sectional study

2017 ◽  
Vol 4 (6) ◽  
pp. 2205
Author(s):  
Madhivanan S. ◽  
Harikrishnan E. ◽  
Kumarasamy K.
Keyword(s):  
Blood Pressure ◽  
Clinical Examination ◽  
Economic Status ◽  
Blood Pressure Measurement ◽  
Cross Sectional Study ◽  
P Value ◽  
Sectional Study ◽  
Cross Sectional ◽  
Significant Difference ◽  
The Mean

Background: Blood pressure measurements in childhood are an important clinical examination. Present study was done to evaluate the normal range of blood pressure (BP) in children aged 6-12 years and to find its relationship with regard to age, sex, height and weight criteria and comparing the values with the available standards.Methods: This prospective cross-sectional study was done in primary and middle schools of Chennai from January 2016 to May 2017. Three readings of blood pressure were recorded for each subject and were correlated with age, gender, socioeconomic status and anthropometry. Data was analysed on SPSS 20.0. P value of <0.05 was considered significantResults: A total of 2002 children (1026 boys, 976 girls) of age between 6-12 years were examined over 18 months. There was an upward trend in both systolic (r = 0.437, P<0.001) and diastolic BP (r = 0.386, P <0.001) with age. There was no statistically significant difference in mean systolic and diastolic BP with gender (P = 0.10), weight (P = 0.10) and height (P = 0.10). There was a statistically significant difference between the mean systolic and diastolic BP between low and high socio-economic groups (P <0.0001). The proportion of children with hypertension was 9.54% with a slight female preponderance.Conclusions: Blood pressure measurement in children is pivotal in clinical examination. It shows a linear relationship with age and varies across socio-economic status. Periodic recording of BP would enable identify hypertension at an early age.

A Prospective Multicenter Clinical Trial of Chinese Herbal Formula JZQG (Jiangzhuoqinggan) for Hypertension

2013 ◽  
Vol 41 (01) ◽  
pp. 33-42 ◽  
Author(s):  
Xiao-Lin Tong ◽  
Feng-Mei Lian ◽  
Qiang Zhou ◽  
Li-Peng Xu ◽  
Hang-Yu Ji ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Clinical Trial ◽  
Waist Circumference ◽  
Ambulatory Blood Pressure ◽  
Blood Pressure Measurement ◽  
Multicenter Clinical Trial ◽  
Beneficial Effects ◽  
Chinese Herbal ◽  
Significant Difference ◽  
Blood Pressures

A prospective multicenter clinical trial was conducted to compare the beneficial effects of a Chinese herbal medicine formula Jiangzhuoqinggan (JZQG) and western antihypertension drug irbesartan. JZQG is mainly composed of rhubarb, coptis, cassia, and uncaria. A total of 240 patients with mild to moderate hypertension were enrolled in the trial. Patients were assigned into two groups after screening: JZQG group and the irbesartan group. After four weeks of treatment, we compared the changes in routine blood pressure, 24 h ambulatory blood pressure, and waist circumference. There was a significant reduction in systolic blood pressure and diastolic blood pressure in the JZQG group (both p < 0.01). There were no significant differences between the reduction of systolic and diastolic blood pressures in the two treatment groups. From the 24 h ambulatory blood pressure measurement, the JZQG group showed a greater reduction in both systolic and diastolic blood pressures (in both daytime and nighttime) than the irbesartan group. Furthermore, there was a significant difference in waist circumference in the JZQG group (1.51 cm reduction; P < 0.05) but not the irbesartan group (0.42 cm). Thus, the JZQG formula may have therapeutic value in patients with both hypertension and metabolic syndrome.

scholarly journals Automated Versus Manual Blood Pressure Measurement: A Randomized Crossover Trial in the Emergency Department of a Tertiary Care Hospital in Karachi, Pakistan: Are Third World Countries Ready for the Change?

2016 ◽  
Vol 4 (3) ◽  
pp. 404-409 ◽  
Author(s):  
Kanaan Mansoor ◽  
Saba Shahnawaz ◽  
Mariam Rasool ◽  
Huwad Chaudhry ◽  
Gul Ahuja ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Pressure Measurement ◽  
Blood Pressure Measurement ◽  
P Value ◽  
Care Hospital ◽  
Pressure Measurements ◽  
The Mean ◽  
The Difference ◽  
Manual Blood Pressure ◽  
Mercury Sphygmomanometer

BACKGROUND: Hypertension has proven to be a strong liability with 13.5% of all mortality worldwide being attributed to elevated blood pressures in 2001. An accurate blood pressure measurement lies at the crux of an appropriate diagnosis. Despite the mercury sphygmomanometer being the gold standard, the ongoing deliberation as to whether mercury sphygmomanometers should be replaced with the automated oscillometric devices stems from the risk mercury poses to the environment.AIM: This study was performed to check the validity of automated oscillometric blood pressure measurements as compared to the manual blood pressure measurements in Karachi, Pakistan.MATERIAL AND METHODS: Blood pressure was recorded in 200 individuals aged 15 and above using both, an automated oscillometric blood pressure device (Dinamap Procare 100) and a manual mercury sphygmomanometer concomitantly. Two nurses were assigned to each patient and the device, arm for taking the reading and nurses were randomly determined. SPSS version 20 was used for analysis. Mean and standard deviation of the systolic and diastolic measurements from each modality were compared to each other and P values of 0.05 or less were considered to be significant. Validation criteria of British Hypertension Society (BHS) and the US Association for the Advancement of Medical Instrumentation (AAMI) were used. RESULTS: Two hundred patients were included. The mean of the difference of systolic was 8.54 ± 9.38 while the mean of the difference of diastolic was 4.21 ± 7.88. Patients were further divided into three groups of different systolic blood pressure <= 120, > 120 to = 150 and > 150, their means were 6.27 ± 8.39 (p-value 0.175), 8.91 ± 8.96 (p-value 0.004) and 10.98 ± 10.49 (p-value 0.001) respectively. In our study 89 patients were previously diagnosed with hypertension; their difference of mean systolic was 9.43 ± 9.89 (p-value 0.000) and difference of mean diastolic was 4.26 ± 7.35 (p-value 0.000).CONCLUSIONS: Systolic readings from a previously validated device are not reliable when used in the ER and they show a higher degree of incongruency and inaccuracy when they are used outside validation settings. Also, readings from the right arm tend to be more precise.

Orthostatic Circulatory Control in the Elderly Evaluated by Non-Invasive Continuous Blood Pressure Measurement

1990 ◽  
Vol 79 (1) ◽  
pp. 73-79 ◽  
Author(s):  
B. P. M. Imholz ◽  
J. H. A. Dambrink ◽  
J. M. Karemaker ◽  
W. Wieling
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Systolic Blood Pressure ◽  
Time Course ◽  
Blood Pressure Measurement ◽  
Elderly Subjects ◽  
Postural Changes ◽  
Significant Difference ◽  
Head Up Tilt ◽  
Blood Pressures

1. Continuous orthostatic responses of blood pressure and heart rate were measured in 40 healthy and active elderly subjects over 70 years of age in order to assess the time course and rapidity of orthostatic cardiovascular adaptation in old age. 2. During the first 30 s (initial phase) the effects of active standing and passive head-up tilt closely resembled those observed earlier in younger age groups. Standing up was accompanied by a drop (mean ± SD) in systolic and diastolic blood pressures of 26 ± 13 mmHg and 12 ± 18 mmHg, respectively, at around 10 s, and a subsequent rise up to 11 ± 17 mmHg and 8 ± 6 mmHg above supine values at around 20 s. The drop in blood pressure upon standing was accompanied by a transient increase in heart rate with a maximum of 13 beats/min, followed by a gradual decrease to 7 beats/min above supine levels. These characteristic transient changes were absent upon a passive head-up tilt. 3. After 1–2 min of standing (early steady-state phase) diastolic blood pressure and heart rate increased significantly after active and passive postural changes. On average, for all subjects systolic blood pressure tended to increase from control during 5–10 min standing, reaching a significant difference at 10 min. During standing, the largest increases in systolic blood pressure were found in subjects with the lowest supine blood pressures. 4. In conclusion, for the investigation of orthostatic circulatory responses in elderly subjects the following factors have to be taken into account: active versus passive changes in posture, the timing of the blood pressure reading, and the level of supine blood pressure.

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