Non-invasive measurement of systolic blood pressure on the arm utilising photoplethysmography: development of the methodology

2005 ◽  
Vol 43 (1) ◽  
pp. 131-135 ◽  
Author(s):  
C. Laurent ◽  
B. Jönsson ◽  
M. Vegfors ◽  
L. -G. Lindberg
Author(s):  
Konstantinos Markakis ◽  
Nikolaos Pagonas ◽  
Eleni Georgianou ◽  
Panagiota Zgoura ◽  
Benjamin J. Rohn ◽  
...  

2005 ◽  
Vol 7 (3) ◽  
pp. 147-152 ◽  
Author(s):  
Rosanne E. Jepson ◽  
Vivien Hartley ◽  
Michael Mendl ◽  
Sarah ME Caney ◽  
David J Gould

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.


2012 ◽  
Vol 14 (9) ◽  
pp. 575-579 ◽  
Author(s):  
Christian Ott ◽  
Siegberto Haetinger ◽  
Markus P. Schneider ◽  
Matthias Pauschinger ◽  
Roland E. Schmieder

1984 ◽  
Vol 79 (5) ◽  
pp. 598-609 ◽  
Author(s):  
G. P. Molhoek ◽  
K. H. Wesseling ◽  
J. J. M. Settels ◽  
E. Vollenhoven ◽  
H. W. H. Weeda ◽  
...  

Author(s):  
Aisa Dinda Mitra ◽  
Helmi Arifin ◽  
Harrizul Rivai

The most commonly used antihypertensives in Indonesia vary according to the age of the patient. At the age of 40-60 years, angiotensin-converting enzyme inhibitor (ACEi) and calcium channel blockers (CCBs) are usually given to older patients. All age groups were treated with a combination of CCB and angiotensin receptor blocker (ARB). Captopril is one of the ACE inhibitor classes, and captopril can lower blood pressure, improve renal impairment, and suppress kidney inflammation through the inactivation of NF-κB in hypertensive mice. Hypertension is closely related to renal dysfunction, requiring blood pressure to be lowered to the normotensive range to prevent progressive kidney damage. In the acute reperfusion stage, captopril prevents excessive angiotensin II synthesis, improves renal dysfunction, inhibited intrarenal inflammation, and better histopathologic findings. Most of the renoprotective effects of captopril occur in the acute reperfusion stage. At the same time, captopril significantly reduces NO availability, exacerbates intrarenal hypoxia, and exacerbates oxidative stress. This study aims to determine the effect of captopril on systolic blood pressure and diastolic blood pressure. In this study, all experimental animals were made hypertensive first by inducing 8% NaCl for 21 days given orally. Then the group with renal complications was induced by administering gentamicin for seven days provided intraperitoneally. Blood creatinine levels were measured using a Photometer5010V5 +. Measurement of systolic blood pressure and diastolic blood pressure using the Non-Invasive Blood Pressure (NIBP) instrument. The data from this study were analyzed using two-way ANOVA. The results showed that complications of renal dysfunction in hypertensive rats had a significant effect on reducing systolic blood pressure and diastolic blood pressure (p ˂ 0.05). The administration of captopril at doses of 1.25 mg, 2.5 mg, and 5 mg significantly affected decreased systolic blood pressure and diastolic blood pressure (p ˂ 0.05). Captopril 5 mg dose was the most effective in lowering systolic blood pressure and diastolic blood pressure.


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