Fetal placental blood flow after uterine artery ligation in the guinea-pig

Placenta ◽  
1989 ◽  
Vol 10 (5) ◽  
pp. 471
Author(s):  
A.M. Carter ◽  
A. Detmer
Keyword(s):  
Blood Flow ◽  
Guinea Pig ◽  
Uterine Artery ◽  
Artery Ligation ◽  
Uterine Artery Ligation ◽  
Placental Blood ◽  
Placental Blood Flow

Placental Blood Flow and Fetal Weight following Uterine Artery Ligation

Neonatology ◽  
1986 ◽  
Vol 49 (3) ◽  
pp. 172-180 ◽  
Author(s):  
Thomas Jansson ◽  
Magnus Thordstein ◽  
Ingemar Kjellmer
Keyword(s):  
Blood Flow ◽  
Uterine Artery ◽  
Fetal Weight ◽  
Artery Ligation ◽  
Uterine Artery Ligation ◽  
Placental Blood ◽  
Placental Blood Flow

Effect of terbutaline sulphate on ovarian, uterine and maternal placental blood flow in the anaesthetized guinea pig

1978 ◽  
Vol 53 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Lena Mårtensson ◽  
Per-Ove B. Sjöquist ◽  
Leif Bjellin ◽  
Anthony M. Carter
Keyword(s):  
Blood Flow ◽  
Guinea Pig ◽  
Terbutaline Sulphate ◽  
Placental Blood ◽  
Placental Blood Flow

Relationship between placental blood flow and placental and fetal size in guinea pig

1982 ◽  
Vol 243 (3) ◽  
pp. H404-H409 ◽  
Author(s):  
S. A. Myers ◽  
J. W. Sparks ◽  
E. L. Makowski ◽  
G. Meschia ◽  
F. C. Battaglia
Keyword(s):  
Blood Flow ◽  
Guinea Pig ◽  
Gestational Age ◽  
Allometric Equation ◽  
Radioactive Microspheres ◽  
Flow Measurements ◽  
Placental Blood ◽  
Fetal Size ◽  
Blood Flow Measurements ◽  
Placental Blood Flow

Blood flow measurements were made using radioactive microspheres in 14 unstressed, conscious, pregnant guinea pigs with gestational age ranging between 34 and 67 days. Within each litter placental blood flow (PBF) was positively correlated to fetal weight (FW), even after correcting for placental weight differences. Although the largest littermate was, on the average, only 30% larger than the smallest, its material placental blood flow was 95% greater. The PBF vs. FW relationship could be described by the allometric equation: PBF = Ai FW2.89 where Ai is a litter-specific coefficient. This study demonstrates that the placenta of the largest littermate is "hyperperfused" compared with its smaller siblings.

Effect of exercise on uterine blood flow in the pregnant Pygmy goat

1984 ◽  
Vol 246 (2) ◽  
pp. H207-H212 ◽  
Author(s):  
A. R. Hohimer ◽  
J. M. Bissonnette ◽  
J. Metcalfe ◽  
T. A. McKean
Keyword(s):  
Blood Flow ◽  
Uterine Artery ◽  
Artery Blood Flow ◽  
Normal Birth Weight ◽  
Uterine Blood Flow ◽  
Normal Birth ◽  
Radioactive Microsphere ◽  
Radioactive Microsphere Technique ◽  
Placental Blood ◽  
Placental Blood Flow

Pygmy goats in the last third of pregnancy were trained to walk on a treadmill at rates up to 2.0 mph and up an inclination of 0-15 degrees. Electromagnetic flowmeters were placed unilaterally on a uterine artery, and measurements were made while the goats were standing quietly on the treadmill and during 5 min of exercise. Blood flow fell during exercise in all five animals studied, and this reduction was proportional to the level of exertion. At the highest level of exercise that these animals would voluntarily perform, uterine artery blood flow fell by 32 +/- 3 (SE) % (P less than 0.001) from control. In four additional animals the radioactive microsphere technique was used to measure uterine blood flow at rest and after 5-7 min of exercise. In these animals, exercise caused total uterine blood flow to fall by 18 +/- 10%; cotyledonary (placental) blood flow fell by 8 +/- 13%, while myoendometrial blood flow decreased by 52 +/- 12% (P less than 0.05). Thus nonplacental portions of the pregnant Pygmy goat uterus suffer major reductions in blood flow during exercise. This vasoconstriction may be due to exercise per se or to concomitant hypocapnia or hyperthermia. Singleton and twin kids born to animals that exercised were of normal birth weight.

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