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Intraocular pressure after cardiopulmonary bypass surgery
1Department of Ophthalmology, University of California, Davis, Sacramento 95816.
American Journal of Ophthalmology
|January 15, 1989
Summary
Cardiopulmonary bypass surgery temporarily increases intraocular pressure in patients, though visual acuity remains unaffected. This ocular pressure change may be linked to the surgery itself, not fluid shifts or blood dilution.
Area of Science:
- Ophthalmology
- Cardiovascular Surgery
Background:
- Cardiopulmonary bypass (CPB) is a critical procedure in cardiac surgery.
- Potential ocular complications following CPB require thorough investigation.
Purpose of the Study:
- To prospectively evaluate the ocular effects of cardiopulmonary bypass surgery.
- To assess changes in intraocular pressure (IOP) and visual acuity post-surgery.
Main Methods:
- Prospective study of 46 patients undergoing CPB.
- Measurements included visual acuity, IOP, body weight, fluid balance, hematocrit, and CPB duration.
- Preoperative and postoperative assessments were conducted.
Main Results:
- Mean IOP increased by 2.1 mm Hg on postoperative day 1 (P = .003), affecting 63% of patients.
- IOP returned to baseline by postoperative day 3.
- No significant visual dysfunction or decrease in visual acuity was reported.
- IOP changes did not correlate with weight gain or hemodilution.
Conclusions:
- CPB surgery can lead to transient increases in intraocular pressure.
- Ocular pressure dynamics during CPB may be a significant factor in postoperative eye issues.
- Postoperative medications may confound findings and warrant further study.