Biomaterial Database

Amniotic fluid transfer of meperidine from maternal plasma in early pregnancy. 1978

H H Szeto, and I A Zervoudakis, and L L Cederqvist, and C E Inturrisi

Concurrent samples of maternal plasma and amniotic fluid were collected from 40 subjects during the second trimester of pregnancy following a single intramuscular dose of meperidine (100 mg). Maternal meperidine plasma levels were highest in samples collected from 15 to 50 minutes after drug administration. Thereafter the level declined during the next 2 hours. Meperidine was not detected in amniotic fluid until 30 minutes after the intramuscular dose. We estimated that an apparent equilibrium was reached between plasma and amniotic fluid at 120 to 155 minutes after the drug was given to the mother. Normeperidine was not detected in either maternal plasma or amniotic fluid during the time course of this study.

UI	MeSH Term	Description	Entries
D008431	Maternal-Fetal Exchange	Exchange of substances between the maternal blood and the fetal blood at the PLACENTA via PLACENTAL CIRCULATION. The placental barrier excludes microbial or viral transmission.	Transplacental Exposure,Exchange, Maternal-Fetal,Exposure, Transplacental,Maternal Fetal Exchange
D008614	Meperidine	A narcotic analgesic that can be used for the relief of most types of moderate to severe pain, including postoperative pain and the pain of labor. Prolonged use may lead to dependence of the morphine type; withdrawal symptoms appear more rapidly than with morphine and are of shorter duration.	Isonipecain,Pethidine,Demerol,Dolantin,Dolargan,Dolcontral,Dolin,Dolosal,Dolsin,Lidol,Lydol,Meperidine Hydrochloride,Operidine EPJ-I,Operidine EPJ I
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D011262	Pregnancy Trimester, Second	The middle third of a human PREGNANCY, from the beginning of the 15th through the 28th completed week (99 to 196 days) of gestation.	Midtrimester,Pregnancy, Second Trimester,Trimester, Second,Midtrimesters,Pregnancies, Second Trimester,Pregnancy Trimesters, Second,Second Pregnancy Trimester,Second Pregnancy Trimesters,Second Trimester,Second Trimester Pregnancies,Second Trimester Pregnancy,Second Trimesters,Trimesters, Second
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000653	Amniotic Fluid	A clear, yellowish liquid that envelopes the FETUS inside the sac of AMNION. In the first trimester, it is likely a transudate of maternal or fetal plasma. In the second trimester, amniotic fluid derives primarily from fetal lung and kidney. Cells or substances in this fluid can be removed for prenatal diagnostic tests (AMNIOCENTESIS).	Amniotic Fluid Index,Amniotic Fluid Indices,Amniotic Fluids,Fluid Index, Amniotic,Fluid Indices, Amniotic,Fluid, Amniotic,Fluids, Amniotic,Index, Amniotic Fluid,Indices, Amniotic Fluid
D013997	Time Factors	Elements of limited time intervals, contributing to particular results or situations.	Time Series,Factor, Time,Time Factor