Biomaterial Database

Placental transfer of midazolam and its metabolite 1-hydroxymethylmidazolam in the pregnant ewe. 1984

T B Vree, and J J Reekers-Ketting, and R J Fragen, and T H Arts

Plasma concentrations of midazolam and its metabolites were measured in maternal and fetal blood after intravenous administration of 90 mg of midazolam to seven pregnant ewes in whom sampling catheters had been chronically implanted. Midazolam and its metabolite 1-hydroxymethylmidazolam crossed the placenta of the pregnant ewe. The fetal/maternal plasma concentration ratio of midazolam and the metabolite was 0.15. The distribution and elimination half-lives of midazolam and the metabolite were identical in both maternal and fetal circulations. The major compound found in the urine was the metabolite 1-hydroxymethylmidazolam glucuronide.

UI	MeSH Term	Description	Entries
D007700	Kinetics	The rate dynamics in chemical or physical systems.
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
D008874	Midazolam	A short-acting hypnotic-sedative drug with anxiolytic and amnestic properties. It is used in dentistry, cardiac surgery, endoscopic procedures, as preanesthetic medication, and as an adjunct to local anesthesia. The short duration and cardiorespiratory stability makes it useful in poor-risk, elderly, and cardiac patients. It is water-soluble at pH less than 4 and lipid-soluble at physiological pH.	Dormicum,Midazolam Hydrochloride,Midazolam Maleate,Ro 21-3981,Versed,Hydrochloride, Midazolam,Maleate, Midazolam,Ro 21 3981,Ro 213981
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
D005260	Female		Females
D005312	Fetal Blood	Blood of the fetus. Exchange of nutrients and waste between the fetal and maternal blood occurs via the PLACENTA. The cord blood is blood contained in the umbilical vessels (UMBILICAL CORD) at the time of delivery.	Cord Blood,Umbilical Cord Blood,Blood, Cord,Blood, Fetal,Blood, Umbilical Cord,Bloods, Cord,Bloods, Fetal,Bloods, Umbilical Cord,Cord Blood, Umbilical,Cord Bloods,Cord Bloods, Umbilical,Fetal Bloods,Umbilical Cord Bloods
D006207	Half-Life	The time it takes for a substance (drug, radioactive nuclide, or other) to lose half of its pharmacologic, physiologic, or radiologic activity.	Halflife,Half Life,Half-Lifes,Halflifes
D000773	Anesthesia, Obstetrical	A variety of anesthetic methods such as EPIDURAL ANESTHESIA used to control the pain of childbirth.	Anesthesia, Gynecological,Anesthesia, Obstetric,Gynecologic Anesthesia,Paracervical Block,Anesthesia, Gynecologic,Block, Paracervical,Blocks, Paracervical,Gynecological Anesthesia,Obstetric Anesthesia,Obstetrical Anesthesia,Paracervical Blocks
D000777	Anesthetics	Agents capable of inducing a total or partial loss of sensation, especially tactile sensation and pain. They may act to induce general ANESTHESIA, in which an unconscious state is achieved, or may act locally to induce numbness or lack of sensation at a targeted site.	Anesthetic,Anesthetic Agents,Anesthetic Drugs,Anesthetic Effect,Anesthetic Effects,Agents, Anesthetic,Drugs, Anesthetic,Effect, Anesthetic,Effects, Anesthetic
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia