Raised Intraocular Pressure After Pneumatic Retinopexy with Cryotherapy

Introduction to Risk Factors

• Driving to or ascending to altitudes more than 1000 feet above the surgical site can cause gas expansion and increased IOP, potentially resulting in arterial occlusion, wound dehiscence, or gas leakage 1, 2
• The use of nitrous oxide anesthesia in patients with intraocular gas may result in a dangerous rise in IOP, and patients should wear a wristband warning that their eye contains intraocular gas and that nitrous oxide must be avoided 1, 2

Postoperative Care and Follow-up

• IOP measurement should be performed at 1-2 days postoperatively and again at 1-2 weeks as part of routine follow-up 1, 2

Critical Pitfalls to Avoid

• Failure to warn patients about altitude restrictions can result in catastrophic vision loss from central retinal artery occlusion 1, 2
• Patients must avoid air travel and ascending to altitudes >1000 feet above the surgical site until complete gas absorption 1, 2, 3
• Anesthesiologists must be informed about intraocular gas presence to avoid nitrous oxide use 1, 2
• The duration of gas persistence varies: SF6 typically lasts 2-3 weeks, while C3F8 can persist for 6-8 weeks 3