• Acta Anaesthesiol Scand · Nov 1992

    Therapeutic intervention scoring system (TISS)--a method for measuring workload and calculating costs in the ICU.

    • J Mälstam and L Lind.
    • Department of Anaesthesiology, County Hospital Gävle, Sweden.
    • Acta Anaesthesiol Scand. 1992 Nov 1;36(8):758-63.

    AbstractThe Therapeutic Intervention Scoring System (TISS) is an easily applicable method for measurement of workload in the intensive care unit (ICU). In the present study a modified TISS-scoring (mTISS) was performed daily during 1988-1989 on 2693 patients in a general ICU. Of these, 900 could be classified as 'true' ICU-patients (ICU-stay > or = 24 h or TISS > or = 20 points), whereas the rest were postoperative. In ICU-patients the average length of stay was 4.5 +/- 8.9 days and the average workload 114 +/- 218 mTISS-points. The workload was not significantly related to age or type of admission (scheduled vs unscheduled). Hospital non-survivors (13.6%) showed a significantly increased mean total mTISS-score (239 +/- 364, P < 0.001). Critically ill (TISS Class IV) patients (14% of the sample), with an average workload of 437 +/- 401 mTISS-points, consumed 53% of the total resources. Patients categorized (ICD-9) to respiratory and infectious diseases showed the greatest average workload (207 +/- 315 and 208 +/- 355 mTISS-points, respectively). A workload-index was also developed relating the actual workload to the ICU personnel. The cost of each mTISS-point was calculated. In conclusion, the present study showed that mTISS is a valuable tool when evaluating resource utilization in the ICU. Together with the proposed workload-index and calculation of costs, mTISS could be used for ICU management control.

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