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Intraocular pressure development after cataract surgery: a prospective study in 50 dogs (1998-2000)
Sabine Chahory1, Bernard Clerc, Julie Guez
1Ophthalmology Unit, National Veterinary College of Alfort, 7 avenue du Général De Gaulle, 94700 Maisons-Alfort, France. schahory@aol.com
Objective:
To study the course of intraocular pressure (IOP) after cataract surgery in 50 dogs.
Design:
Prospective study.
Animals:
Fifty dogs without preoperative ocular hypertension were selected for cataract surgery.
Methods:
All dogs underwent cataract surgery: 25 by manual extracapsular extraction and 25 by phacoemulsification. For each dog, intraocular pressure was measured before surgery, and 1, 3, 5, 18 h, 1 week and 1 month post surgery.
Results:
No significant difference of mean intraocular pressure between the two surgical methods was observed for each time measurement. Nine dogs had postoperative hypertension (IOP > 25 mmHg) during the first 5 hours post surgery. Incidence of postoperative hypertension was not significantly different with manual extracapsular extraction (16%) vs. phacoemulsification (20%). A decrease of mean IOP was observed 1 h after surgery (8.49 mmHg vs. 10.91 mmHg), then an increase 3 and 5 h post surgery (12.3 and 13.32 mmHg, respectively). At 18 h, 1 week and 1 month post surgery, mean IOP decreased. Mean IOP was 10.38, 10.38 and 8.84 mmHg, respectively.
Conclusion:
In this study incidence of POH is not high. However, a follow-up of IOP in the first hours after cataract surgery is required to avoid complications of the retina and optic nerve and to administer hypotensive treatment if necessary.
