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Letters |1 March 1994

Weaning Patients from Mechanical Ventilation Using Gastric pH

Dudley F. Rochester, MD

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  • University of Virginia Health Schiences Center; Charlottesville, VA 22908
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TO THE EDITOR:
Mohsenifar and colleagues [1] reported that tissue acidosis, as reflected by a very low gastric intramural pH, accurately predicted failure to wean patients from mechanical ventilation.
The authors used the HCO3, PCO2, and pH from arterial blood gas analysis plus gastric PCO2 (PgCO2) and the PCO2 factor in the Henderson-Hasselbach equation to calculate gastric intramural pH [1]. Substitution and rearrangement permit cancellation of the HCO3 and PCO2 factor terms. The simpler revised formula is: gastric intramural pH = arterial...
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Rochester DF. Weaning Patients from Mechanical Ventilation Using Gastric pH. Ann Intern Med. 1994;120:438–439. doi: https://doi.org/10.7326/0003-4819-120-5-199403010-00020

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Published: Ann Intern Med. 1994;120(5):438-439.

DOI: 10.7326/0003-4819-120-5-199403010-00020

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Print ISSN: 0003-4819 | Online ISSN: 1539-3704

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