Extended piperacillin-tazobactam infusion with smart pump improves clinical outcomes

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“With the help of smart pump technology, our institution successfully completed a conversion to 4-hour extended infusion P-TZ. Through this conversion, pharmacy expenditure of P-TZ was reduced by 38%; the total cost savings was $387,980.62 for the 24-month postintervention phase.“ Maddox et al (2014).

Reference:

Maddox, M.L., DeBoer, E.C. and Hammerquist, R.J. (2014) Administration of Extended Infusion Piperacillin-Tazobactam With the Use of Smart Pump Technology. Hospital Pharmacy. 49(5), p.444-8.

Abstract:

BACKGROUND: For beta-lactams, the parameter that best predicts bacterial killing is the length of time the antibiotic concentration exceeds the minimum inhibitory concentration (MIC). Studies have demonstrated improved outcomes with extended infusion (4-hour) piperacillin-tazobactam (P-TZ) compared with traditional immediate infusions.

OBJECTIVES: To describe how one institution made the conversion from immediate infusion of P-TZ to a 4-hour extended infusion utilizing an approved automatic therapeutic substitution, staff education, and smart pump technology, and to examine the impact of this conversion on patient length of stay and pharmacy costs.

METHODS: With approval from the Pharmacy and Therapeutics (P&T), Antimicrobial Stewardship, and Medical Executive Committees, the decision was made to automatically convert all P-TZ orders to a standardized 4-hour infusion given every 8 to 12 hours depending on renal function. The medical records of all adult patients receiving P-TZ during 12 months pre implementation and 24 months post implementation of a 4-hour extended infusion of P-TZ were retrospectively analyzed for length of stay and mortality. The cost of P-TZ was also assessed during these time periods.

RESULTS: With the help of smart pump technology, our institution successfully completed a conversion to 4-hour extended infusion P-TZ. Through this conversion, pharmacy expenditure of P-TZ was reduced by 38%; the total cost savings was $387,980.62 for the 24-month postintervention phase. Extended infusion P-TZ reduced hospital length of stay by 0.6 days (P < .05), resulting in an additional cost savings of $1,689,480 for the 24-month postintervention phase. A conservative estimate of total cost savings to the hospital in the first 24 months, including the reduction in P-TZ expenditures, was $2,077,460.

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