Continuous systolic blood pressure monitoring by the difference in electrocardiogram and pulse oximetry in near-term, exteriorized goat fetuses

Journal of the Society for Gynecologic Investigation
Hiroshi SameshimaHiroshi Sakamoto

Abstract

Our purpose was to determine whether systolic arterial pressure, as predicted from the delay time from the electrocardiogram to pulse oximeter waveform, correlates with directly measured systolic blood pressure. Six Japanese Saanen goats at 120-125 days' gestation were used. Experiments were conducted in acutely operated animals under anesthesia. We placed catheters in the carotid artery and jugular vein, electrodes on the chest, and a pulse oximeter probe on the tongue. Systolic blood pressure (Psm), fetal heart rate (FHR), delay time (Td), and pulse oximeter waveform were monitored continuously, and the data were stored. Systolic blood pressure was estimated (Pse) by the simple linear equation of Td. Fetal blood pressure was decreased 10% by hydralazine and blood withdrawal. Correlation coefficients and the agreement between Psm and Pse were determined. A significant correlation (P <.01) with good bias values (< 8 mmHg) and precision values (< 5 mmHg) was obtained between Psm and Pse in all animals. There was also a significant correlation between Psm and Pse with high coefficients for hydralazine (r(2) = 0.82 +/- 0.12) and for withdrawal (r(2) = 0.85 +/- 0.15). The correlations became slightly scattered in acidemia (pH < 7.2...Continue Reading

Citations

Feb 21, 2007·Telemedicine Journal and E-health : the Official Journal of the American Telemedicine Association·Jungsoo KimKwangsuk Park
Apr 6, 2006·The Journal of Obstetrics and Gynaecology Research·Yasuyuki FujitaHitoo Nakano
May 8, 2008·Physiological Measurement·Jung Soo KimKwang Suk Park
Jun 16, 2009·Physiological Measurement·Jae Hyuk ShinKwang Suk Park
Jan 10, 2006·Physiological Measurement·Jung Soo KimKwang Suk Park

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