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Desflurane improves the throughput of patients in the PACU. A cost-effectiveness comparison with isoflurane

[L’usage du desflurane permet de réduire l’occupation de la SDR : étude de rentabilité comparée avec l’isoflurane]

Marc Beaussier, MD^*, Anne Decorps, PharmD, Patrick Tilleul, PharmD PhD, Alexandre Megnigbeto, PharmD, Pierre Balladur, MD PhD and André Lienhart, MD PhD^*

^* From the Department of Anesthesia and Intensive Care,
the Department of Pharmacy, and
the Department of Surgery, St Antoine University Hospital, and
the University Paris XIII, Paris, France.

Purpose: In a pharmacoeconomic approach of anesthesia, postanesthesia care unit (PACU) occupancy can be chosen as a criteria of effectiveness to compare two anesthetic drugs with different rates of elimination and different costs of administration. Our objective was to develop a cost-effectiveness approach for the comparison of isoflurane (I) and desflurane (D).

Method: In this prospective observational study, 68 patients aged 18–70 received either D or I for maintenance of anesthesia for inpatient abdominal procedures. Length of stay (LOS) in PACU was collected by a blinded observer. After the relationship between duration of surgery and LOS in PACU had been established in the 68 observed patients, we estimated the PACU occupancy according to duration of surgery and time of admission in PACU using a computer model of 204 consecutive patients, based on the hypothesis of an exclusive use of either D or I. Outcome measures were direct costs of the anesthesia procedure and occupancy of the PACU.

Results: The direct cost of the anesthetic was significantly higher with D than with I. This represents an increase of CAN$ 2 708 for the 204 patients. PACU occupancy was reduced by at least one patient (out of five beds) during 26.1% of the time with D (P <0.01).

Discussion: Improving the throughput of patients in PACU by using new halogenated anesthetic agents with faster rates of elimination may outweigh the incremental cost of this strategy. This becomes particularly meaningful in operating theatres experiencing frequent overcrowded periods.

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