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[Blindness after nitrous oxide anesthesia and internal gas tamponade]
L Kodjikian1, J Fleury, J Garweg
1Service d'Ophtalmologie, Hôpital de la Croix-Rousse, 103, Grande rue de la Croix-Rousse, Lyon 69004, France.
Journal Francais D'Ophtalmologie
|November 25, 2003
Summary
Nitrous oxide anesthesia can cause severe vision loss in patients with intraocular gas bubbles, leading to retinal artery occlusion. Patients with gas tamponade should avoid nitrous oxide to prevent permanent visual damage.
Area of Science:
- Ophthalmology
- Anesthesiology
Background:
- Retinal detachment surgery often involves intraocular gas tamponades like sulfur hexafluoride (SF6) or perfluoropropane (C3F8) for healing.
- General anesthesia, commonly using nitrous oxide, is frequently employed during ophthalmic procedures.
Observation:
- A patient undergoing surgery for bilateral retinal detachment experienced sudden, severe vision loss in the previously operated eye.
- This occurred immediately after anesthesia with nitrous oxide for the second eye, despite a 2-week-old, stable C3F8 gas bubble in the first eye.
Findings:
- Nitrous oxide rapidly diffused into the intraocular C3F8 gas bubble, causing significant expansion.
- This expansion led to a dangerous increase in intraocular pressure, resulting in central retinal artery occlusion and irreversible ischemic damage.
Implications:
- Nitrous oxide is contraindicated in patients with intraocular gas tamponades due to the risk of severe visual compromise.
- Medical alert bracelets or cards for patients with intraocular gas are recommended to inform healthcare providers and prevent adverse events.
- Awareness among anesthesiologists and ophthalmologists regarding this critical interaction is essential to safeguard patient vision.