Biomaterial Database

Potentiation of succinylcholine phase II block with isoflurane. 1983

F Donati, and D R Bevan

To determine the effect of isoflurane upon phase II block 20 patients were given succinylcholine by infusion at a rate which maintained the twitch tension of the adductor pollicis muscle at 10% of control for 2 to 4 h. The patients were assigned randomly to either nitrous-oxide-isoflurane (0.75-1.5% inspired) or nitrous-oxide-fentanyl for maintenance of anesthesia, and neuromuscular activity was monitored using train-of-four stimulation. Tachyphylaxis to succinylcholine was observed in both groups but this was followed, in the isoflurane group but not in the fentanyl group, by a decrease in succinylcholine requirement. This decrease was related to the extent of phase II block present. It is concluded that isoflurane potentiates succinylcholine phase II block although the mechanisms involved are not necessarily the same as in the potentiation of nondepolarizing neuromuscular blocking drugs.

UI	MeSH Term	Description	Entries
D007263	Infusions, Parenteral	The administration of liquid medication, nutrient, or other fluid through some other route than the alimentary canal, usually over minutes or hours, either by gravity flow or often by infusion pumping.	Intra-Abdominal Infusions,Intraperitoneal Infusions,Parenteral Infusions,Peritoneal Infusions,Infusion, Intra-Abdominal,Infusion, Intraperitoneal,Infusion, Parenteral,Infusion, Peritoneal,Infusions, Intra-Abdominal,Infusions, Intraperitoneal,Infusions, Peritoneal,Intra Abdominal Infusions,Intra-Abdominal Infusion,Intraperitoneal Infusion,Parenteral Infusion,Peritoneal Infusion
D007530	Isoflurane	A stable, non-explosive inhalation anesthetic, relatively free from significant side effects.
D008297	Male		Males
D008738	Methyl Ethers	A group of compounds that contain the general formula R-OCH3.	Ethers, Methyl
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009119	Muscle Contraction	A process leading to shortening and/or development of tension in muscle tissue. Muscle contraction occurs by a sliding filament mechanism whereby actin filaments slide inward among the myosin filaments.	Inotropism,Muscular Contraction,Contraction, Muscle,Contraction, Muscular,Contractions, Muscle,Contractions, Muscular,Inotropisms,Muscle Contractions,Muscular Contractions
D009609	Nitrous Oxide	Nitrogen oxide (N2O). A colorless, odorless gas that is used as an anesthetic and analgesic. High concentrations cause a narcotic effect and may replace oxygen, causing death by asphyxia. It is also used as a food aerosol in the preparation of whipping cream.	Laughing Gas,Nitrogen Protoxide,Gas, Laughing,Oxide, Nitrous
D004357	Drug Synergism	The action of a drug in promoting or enhancing the effectiveness of another drug.	Drug Potentiation,Drug Augmentation,Augmentation, Drug,Augmentations, Drug,Drug Augmentations,Drug Potentiations,Drug Synergisms,Potentiation, Drug,Potentiations, Drug,Synergism, Drug,Synergisms, Drug
D005260	Female		Females
D005283	Fentanyl	A potent narcotic analgesic, abuse of which leads to habituation or addiction. It is primarily a mu-opioid agonist. Fentanyl is also used as an adjunct to general anesthetics, and as an anesthetic for induction and maintenance. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1078)	Phentanyl,Duragesic,Durogesic,Fentanest,Fentanyl Citrate,Fentora,R-4263,Sublimaze,Transmucosal Oral Fentanyl Citrate,R 4263,R4263