منابع مشابه
Coronary flow and myocardial oxygen metabolism in the newborn lamb.
Analysis of factors which may influence oxygen metabolism of the heart has received much attention since the early part of this century (1). Quantitative measurements of coronary blood flow and myocardial oxygen consumption (MVO,) have been accumulated from both human and animal studies (2, 3). These studies were uniformily concerned with adults, however, and virtually no information is availab...
متن کاملInfluence of norepinephrine and digitalis on myocardial oxygen consumption in the newborn lamb.
The relationships between cardiac performance and oxygen usage were explored in 19 newborn lambs (5 hours to 8 days old), and the influence of inotropic stimulation was studied. A preparation was developed to measure coronary sinus flow and myocardial oxygen consumption (MVo2) under controlled hemodynamic conditions. Using a gelatin injection technique, we determined that more than 905? of the ...
متن کاملMyocardial lactate metabolism in fetal and newborn lambs.
BACKGROUND Around birth, myocardial substrate supply changes from carbohydrates before birth to primarily fatty acids after birth. Parallel to these changes, the myocardium is expected to switch from the use of primarily lactate before birth to fatty acids thereafter. However, myocardial lactate uptake and oxidation around birth has not been measured in vivo. METHODS AND RESULTS We measured m...
متن کاملThe Ultrastructure of Taste Buds in the Newborn Lamb
Tichy F.: The ultrastructure of Taste Buds in the Newborn Lamb. Acta vet. Brno, 61, 1992: 83-91. The ultrastructure of taste buds on circumvallate papillae collected from the tongues of three lambs on the day of birth was studied. Of special concern were the composition of the bud from dark, light and receptor cells, formation of the taste pore and the presence and nature of contacts of intrage...
متن کاملMathematical modeling of respiratory system mechanics in the newborn lamb.
In this paper, a mathematical model of the respiratory mechanics is used to reproduce experimental signal waveforms acquired from three newborn lambs. As the main challenge is to determine specific lamb parameters, a sensitivity analysis has been realized to find the most influent parameters, which are identified using an evolutionary algorithm. Results show a close match between experimental a...
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ژورنال
عنوان ژورنال: Pediatric Research
سال: 1974
ISSN: 0031-3998,1530-0447
DOI: 10.1203/00006450-197402000-00082