• Int J Qual Health Care · Aug 2000

    Clinical Trial Controlled Clinical Trial

    Improving time-sensitive processes in the intensive care unit: the example of 'door-to-needle time' in acute myocardial infarction.

    • P O Bonetti, A Waeckerlin, G Schuepfer, and A Frutiger.
    • Interdisziplinäre Intensivstauon, Kantonsspital, Chur, Switzerland.
    • Int J Qual Health Care. 2000 Aug 1;12(4):311-7.

    ObjectiveTo assess and reduce delays in coronary thrombolysis in patients with acute myocardial infarction.DesignProspective, descriptive study using statistical process control.SettingInterdisciplinary intensive care unit of a 300-bed community hospital.SubjectsThirty-seven consecutive patients with acute myocardial infarction who were receiving thrombolytic therapy.InterventionsTo perform an interdisciplinary formal process analysis aimed at detecting delay-causing factors, review of existing house rules, generation and implementation of new practice guidelines.Main Outcome MeasuresComparison of 'door-to-needle times' of patients admitted before, during and after formal process analysis and implementation of new guidelines.ResultsMean 'door-to-needle time' fell significantly from 57 minutes (+/-25.4) in 16 patients studied before, to 32 minutes (+/-9.0) in 16 patients studied after the formal process analysis and the implementation of new guidelines (P < 0.002). An even more pronounced but transient decrease to 24 minutes (+/-3.8) was observed in five patients studied during the phase of formal process analysis (P < 0.004). Delay-causing factors were identified in the areas 'communication', 'people' and 'methods/rules/guidelines'. Equipment failure was never responsible for delays.ConclusionsFormal process analysis, followed by implementation of revised guidelines resulted in a significant reduction of 'door-to-needle time'. An initial dramatic but transient reduction of 'door-to-needle time' was considered observational and must not be mistaken as the definite new level of performance. We conclude that formal process analysis techniques are suited to improve processes in the intensive care unit.

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