Ophthalmic Safety Alert – detachment of cannulas during ophthalmic surgery
The NHS Improvement national patient safety team have informed the College of the continued trend of incidents involving issues with detachment of cannulas during ophthalmic surgery (cannula-associated ocular injury, COI). The cannula is usually attached to either a saline or a viscoelastic syringe. The combination of a small lumen and plunger pressure can result in significant hydraulic force. If the cannula does detach, it can cause extensive damage to the globe with resultant visual impairment.