Ar. Milner et al., EFFECT OF DEMAND FREQUENCY ON LOCKOUT PERIOD - THE ABBOTT-PROVIDER-5500 PATIENT-CONTROLLED ANALGESIA MACHINE, Anaesthesia, 50(6), 1995, pp. 526-528
An Abbott Provider 5500 Patient Controlled Analgesia machine was notic
ed to have developed a prolonged lockout period when frequent analgesi
c demands were being made. This study tested five other machines and d
emonstrated that the duration of the lockout period was influenced by
the frequency of analgesic demands. This finding could have clinical i
mplications and we recommend that the duration of the lockout period s
hould be specifically examined during the testing of patient-controlle
d machines.