title: Effect of demand frequency on lockout period. The Abbott Provider 5500 Patient-Controlled Analgesia machine.
abstract: An Abbott Provider 5500 Patient Controlled Analgesia machine was noticed to have developed a prolonged lockout period when frequent analgesic demands were being made. This study tested five other machines and demonstrated that the duration of the lockout period was influenced by the frequency of analgesic demands. This finding could have clinical implications and we recommend that the duration of the lockout period should be specifically examined during the testing of patient-controlled machines.
authors.affiliation: Department of Anaesthesia, Nottingham City Hospital.
authors.forename: A R
authors.initials: AR
authors.lastname: Milner
authors.forename: R J
authors.initials: RJ
authors.lastname: Harwood
authors.forename: J
authors.initials: J
authors.lastname: Millard
authors.forename: D G
authors.initials: DG
authors.lastname: Bogod
authors.forename: J P
authors.initials: JP
authors.lastname: Curran
mesh_terms: D016058:Analgesia, Patient-Controlled / Q000295:instrumentation* / Q000592:standards; D004334:Drug Administration Schedule; D006801:Humans; D009020:Morphine / Q000008:administration & dosage*; D011897:Random Allocation; D013997:Time Factors
chemical_list: D009020:Morphine