Ocular hypertension following cataract surgery in dogs: 139 cases (1992-1993)

Patricia Joan Smith From the Department of Small Animal Clinical Sciences, College of Veterinary Medicine (Smith, Brooks, Gelatt, Lazarus), and the Division of Biostatistics, Health Science Center (Kubilis), University of Florida, Gainesville, FL 32610.

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Dennis Eugene Brooks From the Department of Small Animal Clinical Sciences, College of Veterinary Medicine (Smith, Brooks, Gelatt, Lazarus), and the Division of Biostatistics, Health Science Center (Kubilis), University of Florida, Gainesville, FL 32610.

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Jarrod Andrew Lazarus From the Department of Small Animal Clinical Sciences, College of Veterinary Medicine (Smith, Brooks, Gelatt, Lazarus), and the Division of Biostatistics, Health Science Center (Kubilis), University of Florida, Gainesville, FL 32610.

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Paul Scott Kubilis From the Department of Small Animal Clinical Sciences, College of Veterinary Medicine (Smith, Brooks, Gelatt, Lazarus), and the Division of Biostatistics, Health Science Center (Kubilis), University of Florida, Gainesville, FL 32610.

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Kirk Norman Gelatt From the Department of Small Animal Clinical Sciences, College of Veterinary Medicine (Smith, Brooks, Gelatt, Lazarus), and the Division of Biostatistics, Health Science Center (Kubilis), University of Florida, Gainesville, FL 32610.

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Objective

To document the incidence of postoperative ocular hypertension (POH) after cataract surgery in dogs.

Design

Retrospective analysis of medical records.

Sample Population

88 dogs that had had cataract surgery.

Procedure

The effect of several categorical variables on the development of POH was evaluated statistically. Postoperative ocular hypertension was defined as intraocular pressure > 25 and > 30 mm of Hg.

Results

The incidence of POH > 25 mm of Hg was 48.9%; > 30 mm of Hg, 33.8%; > 40 mm of Hg, 20.1%; and > 50 mm of Hg, 5.8%. Mean onset of POH > 25 mm of Hg was 4.9 hours. The incidence of POH was not affected by the type of surgery. Eyes that had phacoemulsification developed POH significantly more rapidly (mean, 3.9 hours), compared with those that had extracapsular lens extraction (8.4 hours). Mean phacoemulsification duration was greater in eyes that developed POH, and older dogs were more likely to develop POH. Development of POH was not correlated with sex, stage of cataract, type of surgical procedure performed, intraocular lens placement, preoperative lens-induced uveitis, or posterior lens capsule tears and vitrectomy. However, eyes that received intraocular lens implants developed POH more rapidly, compared with eyes without implants.

Clinical Implications

The high incidence and early onset of POH after cataract surgery suggests that routine use of antiglaucoma medications in the first 12 hours after surgery is warranted. (J Am Vet Med Assoc 1996;209:105–111)

Objective

To document the incidence of postoperative ocular hypertension (POH) after cataract surgery in dogs.

Design

Retrospective analysis of medical records.

Sample Population

88 dogs that had had cataract surgery.

Procedure

The effect of several categorical variables on the development of POH was evaluated statistically. Postoperative ocular hypertension was defined as intraocular pressure > 25 and > 30 mm of Hg.

Results

The incidence of POH > 25 mm of Hg was 48.9%; > 30 mm of Hg, 33.8%; > 40 mm of Hg, 20.1%; and > 50 mm of Hg, 5.8%. Mean onset of POH > 25 mm of Hg was 4.9 hours. The incidence of POH was not affected by the type of surgery. Eyes that had phacoemulsification developed POH significantly more rapidly (mean, 3.9 hours), compared with those that had extracapsular lens extraction (8.4 hours). Mean phacoemulsification duration was greater in eyes that developed POH, and older dogs were more likely to develop POH. Development of POH was not correlated with sex, stage of cataract, type of surgical procedure performed, intraocular lens placement, preoperative lens-induced uveitis, or posterior lens capsule tears and vitrectomy. However, eyes that received intraocular lens implants developed POH more rapidly, compared with eyes without implants.

Clinical Implications

The high incidence and early onset of POH after cataract surgery suggests that routine use of antiglaucoma medications in the first 12 hours after surgery is warranted. (J Am Vet Med Assoc 1996;209:105–111)

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