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A&P OB 3

PRINCIPLES II PLANCENTER CIRCULATION

QuestionAnswer
UTERINE BLOOD FLOW IS AT WHAT RATE 500 - 700 ML/MIN
IS UBF AUTOREGULATED NO IT IS NOT AUTOREGULATED
UBF IS DIRECTLY PROPORTIONAL TO MEAN PERFUSION PRESSURE ACCROSS THE UTERUS AND INVERSELY PROPORTIONAL TO UTERINE VASCULAR RESISTANCE
WHAT DOES HYPOTENSION DO TO UBF IT DECREASES UBF
WHAT DOES EPIDURAL OR SPINAL ANESTHESIA DO TO UBF IT DOES NOT ALTERED UBF IF MATERNAL HYPOTENSION IS AVOIDED.
WHAT DOES UTERINE VASCUCLAR RESISTANCE (UVR) DO TO UTERINE UVR CAUSES UTERINE CONTRACTIONS AND IT DECREASE UTERINE BLOOD FLOW. IT ALSO CAUSES ENDOGENOUS RELEASE OF CATECHOLAMINES R/T MATERNAL STRESS & PAIN
WHAT IS ANESTHESIA CONSIDERATION EPHEDRINE IS NOT ASSOCIATED WITH SIGNIFICANT DECREASES IN UBF
PLACENTAL EXCHANGE OCCURS PRIMARILY BY DIFFUSION
WHAT DOES THE DIFFUSION DEPEND ON THE DIFFUSION DEPENDS ON MATERNAL-TO-FETAL CONCENTRATION GRADIENTS, MATERNAL PROTEIN BINDING, MOLECULAR WEIGHT, LIPID SOLUBILITY, AND DEGRESS OF IONIZATION OF SPECIFIC SUBSTANCE
WHAT DRUGS DO NOT CROSSES THE PLANCENTA BARBS, OPIATE, LA, DO NOT READILY CROSSES THE PLACENTA BECAUSE THEY ARE (LOW MW). NDNM AGENT ARE (HIGH MW, POORLY LIPOID SOLUBLE) AND SUCC (HIGHLY IONIZED) DON NOT READILY CROSS THE PLANCENTA
DUCTUS VENOSUS SHUNTS BLOOD FROM THE UMBILICAL VEIN TO THE INFERIOR VC (BYPASSING THE LIVER)
FORAMEN OVALE SHUNTS BLOOD FROM THE RA TO LA
DUCTUS ARTERIOSUS SHUNTS BLOOD FROM THE PULMONARY ARTERY TO DESCENDING AORTA (BYPASSING LUNGS). BRAIN AND UPPER BODY RECEIVE WELL OXYGENATED BLOOD ABDOMEN AND LOWER BODY RECEIVE LESS WELL OXYGENATED BLOOD
HOW DOES THE FETUS GET OXYGENATED BLOOD WELL OXYGENATED BLOOD ENTERS THE FETUS FROM THE PLANCENTA VIA THE UMBILICAL VEIN
HOW MANY SOURCES DOES IVC HAS IT HAS THRESS SOURCES
BLOOD ENTERS THE RA FROM THE IVC; BETTER SATURATED BLOOD ENTERS THE LA VIA THE FORAMEN OVALE (SHUNT BETWEEN RIGHT AND LEFT ATRIA) (TRUE OR FALSE) TRUE
FROM WHEN DOES THE BLOOD ENTER THE ASCENDING AORTA. BLOOD ENTER THE LV AND IS EJECTED INTO THE ASCENDING AORTA
BLOOD RETURNS TO THE HEART VIA WHAT? BLOOD RETURNS TO THE HEART VIA THE SVC AND COMBINES WITH BLOOD IN THE RA
FROM THE RA WHEN DOES THE BLOOD GOES TO IT ENTERS THE RV AND IS EJECTED INTO THE PULMONARY ARTERY; SMALL AMOUNT GOES TO THELUNGS REMAINDER SHUNTED ACROSS THE DUCTUS ARTERIOUSUS (PULM ARTERY TO AORTA)
Created by: eonaodow
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