A Novel Method Reflecting Arterial Blood Pressure Changes Based on FFT Analysis for Single Pulse Waveform

2008 ◽  
Author(s):  
Ke Xu ◽  
Qi Zhou ◽  
Huifeng Yang
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Single Pulse ◽  
Pulse Waveform ◽  
Arterial Blood ◽  
Novel Method ◽  
Pressure Changes ◽  
Fft Analysis

Ouabain prevents loss of autoregulation in rat pial arterioles caused by reoxygenation after a brief hypoxic episode

1989 ◽  
Vol 67 (5) ◽  
pp. 423-427 ◽  
Author(s):  
J. Kettler ◽  
B. Y. Ong ◽  
D. Bose
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Protective Effects ◽  
Cranial Window ◽  
Arterial Blood ◽  
Hypoxic Episode ◽  
Electrogenic Sodium Pump ◽  
Before And After ◽  
Pressure Changes ◽  
Arteriolar Diameter

Pial arteriolar diameter changes inversely with changes in systemic arterial blood pressure. Such changes are consistent with autoregulatory functions. These responses are reduced by a brief period of hypoxia followed by reoxygenation. By using an open cranial window preparation we assessed the changes in pial arteriolar diameters during blood pressure changes in rats induced by hemorrhage and reinfusion of blood, before and after a brief period of hypoxia. The slopes of the changes in pial arteriolar diameter as a function of mean arterial blood pressure were −0.47 ± 0.26 μm/mmHg (mean ± SD; 1 mmHg = 133.3 Pa) before hypoxia and −0.11 ± 0.23 μm/mmHg after hypoxia in the untreated rats. In ouabain-treated rats, corresponding slopes were −0.42 ± 0.24 and −0.46 ± 0.22 μm/mmHg. The observed protective effects of ouabain might be a blockade of the Na–K pump in the sarcolemma of the vascular smooth muscle.Key words: vascular smooth muscle, electrogenic sodium pump, metabolic inhibition.

scholarly journals Mechanisms of Inhaled Fine Particulate Air Pollution–Induced Arterial Blood Pressure Changes

2009 ◽  
Vol 117 (3) ◽  
pp. 361-366 ◽  
Author(s):  
Carlo R. Bartoli ◽  
Gregory A. Wellenius ◽  
Edgar A. Diaz ◽  
Joy Lawrence ◽  
Brent A. Coull ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Air Pollution ◽  
Arterial Blood Pressure ◽  
Particulate Air Pollution ◽  
Arterial Blood ◽  
Fine Particulate ◽  
Pressure Changes

Carotid Blood Pressure in Normal and Tumor-Bearing Mice

1956 ◽  
Vol 184 (3) ◽  
pp. 599-604 ◽  
Author(s):  
Sachindra N. Pradhan ◽  
Betty Achinstein ◽  
Murray J. Shear
Keyword(s):  
Blood Pressure ◽  
Carotid Artery ◽  
Arterial Blood Pressure ◽  
Mean Blood Pressure ◽  
Tumor Bearing ◽  
Arterial Blood ◽  
Intraperitoneal Dose ◽  
Sarcoma 37 ◽  
The Mean ◽  
Pressure Changes

Blood pressure was measured directly in mice after cannulation of the carotid artery. The anesthetic was urethan in a single intraperitoneal dose of 1.4–1.6 mg/gm. The apparatus was a Technitrol Lilly manometer, or a Statham physiological transducer (Model P 23 D) with a Brush ‘Universal analyzer.’ The blood pressure was continuously recorded in some 400 CAF1 mice, both normal and bearers of Sarcoma 37. In 166 mice without tumor, the mean blood pressure varied from 35–110 mm of mercury; the average was 71 with a S.E. of ± 1. In 233 mice bearing 6-day-old implants of Sarcoma 37, the pressure varied from 40–110 mm.; the average was 78 ± 1 mm. Under these conditions of continuous recording of arterial blood pressure, about 40% of the animals lived for 2 hours; a few survived as long as 6 hours. The various patterns of blood pressure changes are described and illustrated.

Arterial Blood Pressure - The Pattern of Change in Twin Pregnancies

1985 ◽  
Vol 34 (3-4) ◽  
pp. 217-223 ◽  
Author(s):  
D.M. Campbell ◽  
A.J. Campbell
Keyword(s):  
Blood Pressure ◽  
Body Size ◽  
Weight Gain ◽  
Diastolic Blood Pressure ◽  
Arterial Blood Pressure ◽  
Diastolic Pressure ◽  
Arterial Blood ◽  
Pressure Changes ◽  
Twin Pregnancies ◽  
Weight Gain During Pregnancy

AbstractAn epidemiological study of all primigravid twin pregnancies delivered in Aberdeen between 1950 and 1969 was performed to determine the pattern of arterial blood pressure changes. There is a greater fall from non-pregnant levels in diastolic blood pressure by mid pregnancy and a greater rise of diastolic pressure by delivery. These changes are independent of age, body size and rate of weight gain during pregnancy. The expected increased incidence of proteinuric pre-eclampsia is also independent of rate of weight gain when defined for twin pregnancies.

scholarly journals Tracking blood pressure changes by means of non-invasive intermittent blood pressure measurements in clinical application

2021 ◽  
Vol 7 (2) ◽  
pp. 815-818
Author(s):  
Robert Huhle ◽  
Thorsten Richter ◽  
Marcelo Gama de Abreu
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Pressure Range ◽  
Tracking Error ◽  
Correlation Coefficients ◽  
Non Invasive ◽  
Arterial Blood ◽  
The Mean ◽  
Blood Pressure Range ◽  
Pressure Changes

Abstract Considering accuracy/precision cut-offs of 5 ± 8 mmHg and cut-off values for inter-class correlation coefficients (ICC=0.37...1, from DIN EN ISO 81060-2), absolute and relative errors in time independent measurement of blood pressure changes with non-invasive intermittent devices (NiBP) are derived mathematically for mean arterial blood pressure range of 40-180 mmHg. As a clinically relevant value for change of arterial blood pressure 20% of the baseline blood pressure is considered. The mean ratio between the change of BP measured by the NiBP and measured by the invasive reference device (TE%) were proposed as quality measure for the evaluation of NiBP device tracking capability. The proposed measure TE%is theoretically independent of absolute accuracy but depends on precision and ICC of a device. NiBP devices show considerable maximum TE% of 41% in tracking mean blood pressure changes respectively. In 10% of the measurements in the low blood pressure range TE% exceeding 100%. The mean 50th/90th TE% percentile over the whole blood pressure range were 25/61%, respectively. Furthermore, TE% was relatively insensitive to assumed blood pressure range but sensitive to ICC. NiBP devices have high relative error in tracking blood pressure changes that make those devices not well-suited for tracking blood pressure changes. The proposed tracking error allows the definition of reasonable accuracy/precision requirements of NBP devices.

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