JOURNAL ARTICLE

Utilisation and outcome of renal replacement therapy in an Asian tertiary intensive care unit

Gordon Y S Choi, Gavin M Joynt, Charles D Gomersall, H Y So
Hong Kong Medical Journal 2011, 17 (6): 446-52
22147313

OBJECTIVES: To determine the period prevalence, demographic characteristics, cost of treatment, and outcomes of patients admitted to the intensive care unit for continuous renal replacement therapy.

DESIGN: Descriptive case series.

SETTING: Intensive Care Unit in a Hong Kong tertiary referral, teaching hospital.

PATIENTS: All patients admitted to the Intensive Care Unit from January to December 2007 who underwent continuous renal replacement therapy.

MAIN OUTCOME MEASURES: Period prevalence of continuous renal replacement therapy, patient demographic data, referral sources by specialty and hospital location, diagnosis, daily cost of disposable items, duration of renal replacement therapy, intensive care unit length of stay, and hospital mortality.

RESULTS: Of 1652 patients admitted to the intensive care unit over a 12-month period, 131 (8%) underwent continuous renal replacement therapy, of whom 56% were admitted from general wards (the department of medicine being the source of 59% of referrals). The median age of these continuous renal replacement therapy patients was 67 (interquartile range, 55-76) years, with a slight male predominance (66%). The mean APACHE II score of the patients was 29 (standard deviation, 7). Chronic renal failure requiring either haemodialysis or peritoneal dialysis was present in 20/131 (15%) patients. Sepsis was the diagnosis most commonly associated with renal failure deemed to warrant continuous renal replacement therapy (43%). The median duration of such continuous therapy was 55 (interquartile range, 25-93) hours and the median intensive care unit length of stay was 120 (interquartile range, 51-289) hours. The mean daily cost of disposables for the provision of continuous renal replacement therapy was HK$3510. The overall intensive care unit mortality of patients having continuous renal replacement therapy was 38% and the hospital mortality was 53%. The corresponding rates for patients with acute renal failure were 45% and 56%, respectively. Patients undergoing continuous renal replacement therapy had prolonged intensive care unit stays (120 vs 24 hours; P<0.05) and higher corresponding hospital mortality rates (53% vs 20%; P<0.001) compared to those not having such therapy.

CONCLUSION: The 8% period prevalence of patients admitted to the intensive care unit undergoing continuous renal replacement therapy was somewhat higher than in recently published reports in the international literature. However intensive care unit and hospital mortality rates for such patients were lower than previously reported. The corresponding total daily cost of relevant disposables was similar to costs reported internationally, whilst the length of intensive care unit stays for our cohort were relatively short.

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