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      Pro/con clinical debate: Tracheostomy is ideal for withdrawal of mechanical ventilation in severe neurological impairment

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          Abstract

          Most clinical trials on the topic of extubation have involved patients outside the neurological intensive care unit. As a result, in this area clinicians are left with little evidence on which to base their decision making. Although tracheostomies are increasingly common procedures, they are not without complications and costs, and hence a decision to perform them should not be taken lightly. In this issue of Critical Care two groups debate the merits of tracheostomy before extubation in a patient with neurological impairment. What becomes very clear is the need for more high quality data for this common clinical problem.

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          Most cited references22

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          Implications of extubation delay in brain-injured patients meeting standard weaning criteria.

          We hypothesized that variation in extubating brain injured patients would affect the incidence of nosocomial pneumonia, length of stay, and hospital charges. In a prospective cohort of consecutive, intubated brain-injured patients, we evaluated daily: intubation status, spontaneous ventilatory parameters, gas exchange, neurologic status, and specific outcomes listed above. Of 136 patients, 99 (73%) were extubated within 48 h of meeting defined readiness criteria. The other 37 patients (27%) remained intubated for a median 3 d (range, 2 to 19). Patients with delayed extubation developed more pneumonias (38 versus 21%, p < 0.05) and had longer intensive care unit (median, 8.6 versus 3.8 d; p < 0.001) and hospital (median, 19.9 versus 13.2 d; p = 0.009) stays. Practice variation existed after stratifying for differences in Glasgow Coma Scale scores (10 versus 7, p < 0.001) at time of meeting readiness criteria, particularly for comatose patients. There was a similar reintubation rate. Median hospital charges were $29,057.00 higher for extubation delay patients (p < 0.001). This study does not support delaying extubating patients when impaired neurologic status is the only concern prolonging intubation. A randomized trial of extubation at the time brain-injured patients fulfill standard weaning criteria is justifiable.
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            Predictors of successful extubation in neurosurgical patients.

            A respiratory therapist-driven weaning protocol incorporating daily screens, spontaneous breathing trials (SBT), and prompts to caregivers has been associated with superior outcomes in mechanically ventilated medical patients. To determine the effectiveness of this approach in neurosurgical (NSY) patients, we conducted a randomized controlled trial involving 100 patients over a 14-mo period. All had daily screens of weaning parameters. If these were passed, a 2-h SBT was performed in the Intervention group. Study physicians communicated positive SBT results, and the decision to extubate was made by the primary NSY team. Patients in the Intervention (n = 49) and Control (n = 51) groups had similar demographic characteristics, illness severity, and neurologic injuries. Among all patients, 87 (45 in the Control and 42 in the Intervention group) passed at least one daily screen. Forty (82%) patients in the Intervention group passed SBT, but a median of 2 d passed before attempted extubation, primarily because of concerns about the patient's sensorium (84%). Of 167 successful SBT, 126 (75%) did not lead to attempted extubation on the same day. The median time of mechanical ventilation was 6 d in both study groups, and there were no differences in outcomes. Overall complications included death (36%), reintubation (16%), and pneumonia (9%). Tracheostomies were created in 29% of patients. Multivariate analysis showed that Glasgow Coma Scale (GCS) score (p or = 8 at extubation was associated with success in 75% of cases, versus 33% for a GCS score < 8 (p < 0.0001). Implementation of a weaning protocol based on traditional respiratory physiologic parameters had practical limitations in NSY patients, owing to concerns about neurologic impairment. Whether protocols combining respiratory parameters with neurologic measures lead to superior outcomes in this population requires further investigation.
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              Evidence-Based Guidelines for Weaning and Discontinuing Ventilatory Support

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                Author and article information

                Journal
                Crit Care
                Critical Care
                BioMed Central (London )
                1364-8535
                1466-609X
                2004
                13 May 2004
                : 8
                : 5
                : 327-330
                Affiliations
                [1 ]Assistant Professor, Dipartimento di Discipline Medico Chirurgiche, Sezione di Anestesiologia e Rianimazione, University of Turin, Turin, Italy
                [2 ]Resident, Dipartimento di Discipline Medico Chirurgiche, Sezione di Anestesiologia e Rianimazione, University of Turin, Turin, Italy
                [3 ]Staff Physician, Dipartimento di Discipline Medico Chirurgiche, Sezione di Anestesiologia e Rianimazione, University of Turin, Turin, Italy
                [4 ]Fellow, Respirology and Critical Care Medicine, University of Toronto, Toronto, Canada
                [5 ]Assistant Professor, Department of Medicine, Division of Respirology, and the Interdepartmental Division of Critical Care Medicine, University Health Network and Mount Sinai Hospital, University of Toronto, Toronto, Canada
                Article
                cc2864
                10.1186/cc2864
                1065006
                15469593
                bdf74278-ea6d-43d9-8632-e55087d8c37d
                Copyright © BioMed Central Ltd
                History
                Categories
                Review

                Emergency medicine & Trauma
                weaning,brain injury,intubation,tracheostomy,neurosurgical intensive care

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