Search

Your search keyword '"Oja R"' showing total 3 results
Start Over Author "Oja R" Publisher elsevier
3 results on '"Oja R"'

1. Contributors

Author

Abels, T, primary, Abu-Osba, Y K, additional, Ahmad, M S, additional, Al-Habbal, A M, additional, Albin, N A, additional, Alexander, D P, additional, Alexander, S, additional, Alverson, D C, additional, Andrews, D C, additional, Antila, K J, additional, Arnold, J M, additional, Bekedam, D J, additional, Benthin, M, additional, Berec, A, additional, Berman, W, additional, Bernard, N, additional, Blomquist, T, additional, Britton, H G, additional, Burns, P N, additional, Cantraine, F, additional, Carter, M C, additional, Castle, B, additional, Cooper, M, additional, Dahl, P, additional, Dawes, G S, additional, Dawson, A J, additional, De Bakker, O, additional, De Toffoli Konishi, G, additional, Dillon, T, additional, Dodgson, M S, additional, Doyle, A T, additional, Dunn, P M, additional, Eldridge, M, additional, Elzouki, A, additional, Eriksen, P S, additional, Evans, J M, additional, Fallenstein, F, additional, Faquih, A, additional, Fazary, A L, additional, Gennser, G, additional, Gill, R W, additional, Gough, N A J, additional, Grella, P, additional, Martino, V, additional, Hoogland, H J, additional, Huch, A, additional, Huch, R, additional, Jansen, T C, additional, Jensen, O, additional, Johnson, P, additional, Jorgensen, N-P, additional, Kariniemi, V, additional, Kishan, J, additional, Kuzniar, J, additional, Leblanc, R, additional, Lindstrom, K, additional, Lingman, G, additional, Lubbers, D W, additional, Maarof, H M, additional, Mackenzie Nuffield, I Z, additional, Magne, P H, additional, Marsal, K, additional, Martino, R, additional, Melchior, J, additional, Mir, N A, additional, Morgenstern, J, additional, Murrills Wessex Regional, A J, additional, Nagel, J H, additional, Naumann, U, additional, Nickelsen, C, additional, Niermeijer, M F, additional, Oja, R T, additional, Parsons, R J, additional, Piela, A, additional, Redman, Nuffield, C W G, additional, Redstone, D, additional, Rolfe, P, additional, Ryan, G D, additional, Sa'di, A R, additional, Schettler, H, additional, Schmidt, S, additional, Schwers, J, additional, Sharp, F, additional, Sheddon, J, additional, Siimes, A S I, additional, Skret, A, additional, Smith, N C, additional, Somville, T, additional, Soni, A, additional, Southall, D P, additional, Soutter, W P, additional, Spencer, J A D, additional, Stewart, P A, additional, Svenningsen, L, additional, Szmigiel, Z, additional, Talbert, D G, additional, Thalji, A A, additional, Thomsen, S G, additional, Tonge, H M, additional, Uttendorfsky, O Th, additional, Valimaki, I A, additional, Van der Wiel, A R, additional, Veersema, D, additional, Velussi, C, additional, Verhoeff, A, additional, Vetter, K, additional, Visser, G H A, additional, Vossen, M, additional, Wallenburg, H C S, additional, Weber, T, additional, Wheeler, T, additional, Wilmshurst, T H, additional, Wladmiroff, J W, additional, Wolf Biomedical, P, additional, Wollner, J C, additional, Wolton, R S, additional, and Zaczek, T, additional

Published
1986
Full Text
View/download PDF

2. Transcutaneous PO2, PCO2 and heart rate patterns during normal postnatal adaptation and respiratory distress.

Author

Aarimaa T and Oja R

Subjects
Adaptation, Physiological, Humans, Respiratory Distress Syndrome, Newborn blood, Blood Gas Monitoring, Transcutaneous, Heart Rate, Infant, Newborn physiology, Infant, Premature physiology, Respiratory Distress Syndrome, Newborn physiopathology
Abstract

Three groups of neonates were observed during their first 5 days of postnatal life. Healthy term babies (N = 22) did not differ in their heart rate variability (HRV) nor heart rate (HR) from the healthy preterm babies (N = 21) during the first 3 days. On day 5 beat-to-beat variability of term babies was greater. In healthy term and preterm infants HRV increased between days 1 and 3. HRV of the babies with respiratory distress syndrome (RDS) (N = 1) remained low throughout the study period. HR of the babies with RDS was significantly higher compared to the other groups on the days 1 and 3. Transcutaneous PO2 was high in healthy preterm infants compared to the other groups. The correlation between PaCO2 and PtcO2 in RDS was insufficient to make clinical judgement. PtcCO2 of all neonates tended to rise on the day 5 but the rise was most prominent in the infants with RDS. The correlation of PaCO2 and PtcCO2 was good. In RDS high HR, low HRV and elevated PtcCO2 were the typical findings and present throughout the study period.

Published
1988
Full Text
View/download PDF

3. Impact of thermal vasomotor control on the heart rate variability of newborn infants.

Author

Lindqvist A, Oja R, Hellman O, and Välimäki I

Subjects
Capillaries physiology, Hot Temperature, Humans, Infant, Newborn, Periodicity, Physical Stimulation, Regional Blood Flow, Body Temperature Regulation, Heart Rate, Vasomotor System physiology
Abstract

The reactivity of the periodic heart rate variability (HRV) to the thermal vasomotor control was studied during quiet sleep in a total of 20 neonates which were classified in 5 groups according to their maturity. Thermal stimulation on the peripheral skin was applied by an air blower at the rates of 5, 2.5 and 1.5 cycles/min. The oscillation of successive R-R intervals of the ECG was determined by a hybrid computer technique during thermal stimulations and compared to spontaneous HRV activity. The indices of the HRV and the total power of the periodic HRV remained unchanged during thermal stimulations. The response of the periodic HRV was selective at the spectral band corresponding to the frequency of stimulation. It was maximal at 5 cycles/min. The relative response was highly significant (P less than 0.001) and it increased with increasing maturity. The state of SGA (small for gestational age) seemed to decrease the vasomotor response of the HRV. The results suggested that the thermal vasomotor control was functional already in small preterm infants and it tended to increase with increasing maturity as does the autonomic cardiac control in general.

Published
1983
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results