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Aim: Parenteral nutrition is a high‐cost but essential support service in contemporary health care, yet no model exists to determine the total cost. This study aimed to create a cost analysis model identifying both direct and indirect costs of parenteral nutrition inpatient care.
Methods: A health economics analysis model was constructed and used to create an audit tool for measuring parenteral nutrition costs in seven predefined categories. This tool was piloted on a cohort of 21 consecutive patients commencing parenteral nutrition at a large city hospital between March and April 2008. These patients were prospectively audited for a maximum 12 days or until parenteral nutrition cessation (192 patient days). Costs and adherence to evidence‐based guidelines were compared across the seven categories and between patient subgroups determined by ward locality upon commencement.
Results: The mean total cost for all parenteral nutrition patients was $1579(NZD)/day, of which non‐parenteral hospital costs comprised 85%. For patients treated solely outside the intensive care unit, cost was $1045 per day, of which 24% was directly attributed to provision of parenteral nutrition. Formula accounted for nearly two‐thirds (63%) of parenteral nutrition direct costs and 8.5% of that prescribed was wasted. Return to oral or enteral nutrition was achieved in 57% patients within 12 days of commencing parenteral nutrition.
Conclusions: Direct costs involved in providing parenteral nutrition appear to be less than previously reported, and represent a relatively small proportion of the total cost of care. This cost category analysis may have application in measuring and comparing parenteral nutrition service delivery in other institutions.