Intraocular-Pressure And Mechanical Ventilation

    Authors

    D. S. Johnson;D. J. Crittenden

    Comments

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    Abbreviated Journal Title

    Optom. Vis. Sci.

    Keywords

    Ventilation; Respirator; Peak Inspiratory Pressure; Valsalva Maneuver; Tidal Volume; Hyperventilation; Intraocular Pressure; Tonometer; Ophthalmology

    Abstract

    Mechanical ventilation increases superior vena cava pressure and should theoretically increase episcleral venous pressure and intraocular pressure (IOP). A Keeler Pulsair Non Contact Tonometer was used to measure the IOP's of six subjects with no history of glaucoma or ocular hypertension. At 30 min of supine mechanical ventilation of tidal volume with low (7 to 15 cm H2O) peak inspiratory pressures, the IOP's were no different than at the end of a 30-min control period of supine spontaneous ventilation. However, using high (60 cm H2O) peak inspiratory pressures for 1 min after tidal volume ventilation, IOP's were 32.7% higher than at the end of the supine spontaneous ventilation control period (p < 0.05). Patients requiring long-term mechanical ventilation at high peak inspiratory pressures may be at increased risk of vision impairment secondary to machine-induced increase of IOP.

    Journal Title

    Optometry and Vision Science

    Volume

    70

    Issue/Number

    7

    Publication Date

    1-1-1993

    Document Type

    Article

    Language

    English

    First Page

    523

    Last Page

    527

    WOS Identifier

    WOS:A1993LM11200001

    ISSN

    1040-5488

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