lockout interval


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lockout interval

In patient-controlled analgesia (PCA), the number of minutes a patient must wait between demanded doses of pain relievers. During the lockout interval, no medications are delivered to the patient no matter how many times a dose is requested. Typical lockout intervals in PCA are between 5 and 15 min.
See also: interval
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References in periodicals archive ?
Based on PCoA Acute log files, no pills were dispensed within the safety lockout interval and all patients attempts to obtain a pill during the lockout time failed (data not shown).
Lim et al [13] studied 300 nulliparous parturients with demand-only PCEA and PCEA with background infusion, the demand-only PCEA with a 5-mL bolus, 15-mins lockout interval resulted in less local anaesthetic consumption, but an increased incidence of breakthrough pain, higher pain scores, shorter duration of effective analgesia and lower maternal satisfaction when compared with PCEA with background infusion.
If the VAS score was more than 30, the physician incharge could give 2cc bolus via PCA, without changing the bolus dose and lockout interval. Time to first analgesia requirement and side-effects like pruritus, nausea and vomiting were recorded: 0= no episode; 1= at least one episode.