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Biomedical subjects

D R Cyr

Publications and source records attributed to D R Cyr.

42 records · Page 3Linked to original sources
PubMed1985

Sonography of gallbladder duplication and differential considerations.

With the routine use of sonography in the evaluation of suspected gallbladder disease, the familiarity of gallbladder duplication and its differential considerations are essential. Three cases are presented: one surgically proven duplication of the gallbladder, one case in which the sonographic findings were compatible with duplication of the gallbladder, and one surgically proven intraperitoneal fibrous band mimicking a gallbladder duplication. Gallstones were present in all cases and were confined to only one of the two lobes identified in each case. The gallstones did not communicate between individual gallbladder lobes despite multiple patient positions. Contraction of the non-stone-containing lobe was present in one nonfasting patient, which is probably the best indirect sign of a double gallbladder.

Adult↗
PubMed1985

Genetic amniocentesis: significance of intraamniotic bleeding and placental location.

Simultaneous ultrasound was used to determine if there was a correlation between visualized intraamniotic bleeding, placental location, and fetal-maternal hemorrhage. It was hoped to then determine which Rh-negative patients should receive Rh immunoglobulin. Visualized intraamniotic bleeding showed no correlation to fetal-maternal hemorrhage. Intraamniotic bleeding was commonly associated with needle insertion through an anterior placenta, but also occurred regardless of placental location and in the absence of placental needle traversal. No correlation was found between placental location and fetal-maternal hemorrhage as evidenced by evaluation of maternal serum alpha-fetoprotein. The Kleihauer test was not as sensitive as alpha-fetoprotein.

Amniocentesis↗
PubMed1985

Hydrops from reciprocating atrioventricular tachycardia in a 27-week fetus requiring quinidine for conversion.

A 27-week fetus with severe nonimmune hydrops was found to have a reciprocating atrioventricular tachycardia with the rate of 275 beats per minute. Maternal digitalization produced improvement without conversion. Large doses of propranolol were without effect. Twelve days later quinidine was added, and conversion to sinus rhythm occurred after only two hours and persisted to term. The infant has no heart disease. Literature review confirms digoxin as the first choice for treatment of fetal reciprocating tachycardia, with excellent transplacental passage. Propranolol has not been demonstrably effective, and has poor placental passage. Verapamil also produced poor cord blood levels in two trials. Placental passage for procainamide is uncertain, but long-term use has been unsatisfactory. Quinidine is recommended as the second drug for treatment of resistant fetal tachyrhythmias.

Adult↗
PubMed1984

Estimating fetal weights less than 2000 g: an accurate and simple method.

An accurate estimated fetal weight in the low-birth-weight infant can provide valuable information for the obstetrician faced with a decision concerning mode and time of delivery. Four existing equations for calculating fetal weight were analyzed and compared with data consisting entirely of infants with birth weights of 500-2000 g. A new formula, birth weight-grams = 10.1 (abdominal circumference-cm X biparietal diameter-cm) - 481, is proposed as a simple yet accurate alternative. This equation has a standard deviation of 99 g/kg.

Birth Weight↗