Güitrón-Cantú, A [Effect of different doses of fentanyl and butylhyoscine on the rabbit's sphincter of Oddi]. [electronic resource] - Revista de gastroenterologia de Mexico - 89-96 p. digital Publication Type: Journal Article ISSN: 0375-0906 Subjects--Topical Terms: Analgesics, Opioid--administration & dosageAnimalsConscious Sedation--methodsDose-Response Relationship, DrugFentanyl--administration & dosageManometry--methodsMuscarinic Antagonists--administration & dosageMuscle Relaxation--drug effectsRabbitsScopolamine--administration & dosageSphincter of Oddi--drug effects