Title

Intraocular-Pressure And Mechanical Ventilation

Title - Alternative

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.

Publication 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

Share

COinS