Demonstrates that mechanical ventilation readings predict hemodynamic changes in patients, suggesting better accuracy in monitoring cardiopulmonary status.
A study of 168 central venous pressure measurements obtained during mechanical ventilation (MV) and spontaneous breathing (SB) was undertaken to determine the existence and magnitude of systematic differences. The results show that MV readings were followed closely by predictable changes in SB readings, with a mean difference of 1.8 cm H20. Both MV and SB protocols were sensitive to hemodynamic changes when taken serially. We feel that, based on these results, the MV protocol will more accurately reflect the patient's cardiopulmonary status during mechanical ventilatory support.
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Cordy et al. (1979) studied this question.
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