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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...

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Hypotony after 25-gauge vitrectomy.

Giulio Bamonte1, Marco Mura, H Stevie Tan

  • 1Department of Ophthalmology, Academic Medical Center, University of Amsterdam, The Netherlands.

American Journal of Ophthalmology
|October 26, 2010
PubMed
Summary

Transient hypotony is common after 25-gauge vitrectomy, affecting 13.1% of patients. Factors like tamponade and reoperation influence its occurrence, but it typically resolves without permanent damage.

Area of Science:

  • Ophthalmology
  • Surgical Techniques

Background:

  • 25-gauge vitrectomy is a widely used surgical technique.
  • Hypotony, or low intraocular pressure (IOP), is a potential complication following ocular surgery.

Purpose of the Study:

  • To determine the incidence of hypotony after 25-gauge vitrectomy.
  • To identify preoperative and intraoperative factors associated with hypotony development.

Main Methods:

  • Retrospective analysis of 122 consecutive 25-gauge vitrectomy cases.
  • Intraocular pressure (IOP) measured by Goldmann tonometry on postoperative day 1.
  • Evaluation of clinical signs of hypotony and other complications.

Main Results:

  • Hypotony (IOP ≤ 5 mm Hg) occurred in 13.1% of cases on postoperative day 1.

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  • Lower risk of hypotony with air/gas tamponade (3.3%) vs. no tamponade (22.4%).
  • Higher risk in reoperations (29.9%) vs. primary (9.2%), with intravitreal triamcinolone (35.3%) vs. none (10.3%), and in pseudophakic (15.6%) or combined surgery (25.0%) eyes vs. phakic (6.7%).

    • Conclusions:

    • Transient hypotony is a common occurrence after 25-gauge vitrectomy.
    • Tamponade, reoperation, lens status, and triamcinolone use significantly influence hypotony risk.
    • While hypotony typically resolves spontaneously, strategies to mitigate its risk are needed to enhance surgical safety.