The Effect Of Various Anesthetics Upon The Strength Of Uterine Contractions M Pierce Rucker (Va Usa Richmond) Affiliation: Richmond, Va. Usa

In-8° broché, 12 pages. Résumé: It is important that the obstetrician know of an anesthetic, not only its safety in regard to both mother and child, but also the effect upon uterine contractions, in order that he may choose intelligently the proper anesthetic for any given case. The effect of an anesthetic upon the uterus not only influences the progress of labor, but also the ease of intrauterine manipulations, and the likelihood of atonic postpartum bleeding. The behavior of the uterus is often inconstant, and this fact must constantly be borne in mind. It would seem, however, that all anesthetics with the possible exception of ethylene, have a tendency to diminish the force and frequency of uterine contractions in proportion to the amount given. This effect is less marked with nitrous oxide-oxygen, and most marked with chloroform. Sacral anesthesia with novocaine belongs in a class by itself. Its usual effect is to stop all contractions soon after it is administered, but the contractions return with unimpaired force before the effect of the drug wears off.