Gas bubble injected into the vitreous cavity?

Gas bubble injected into the vitreous cavity?

• A. Pneumatic Retinopexy
• B. Vitrectomy
• C. Cryopexy
• D. Scleral Buckling

Answer: (A)

Gas tamponade is used to press a retinal tear against the eye’s wall so that the tear can seal and the retina reattach. In pneumatic retinopexy, a small amount of air or expansile gas is injected into the vitreous cavity to form a bubble. This bubble floats and presses against the tear, allowing laser photocoagulation or cryopexy to create a firm chorioretinal adhesion around the break. The patient is then positioned so the bubble remains in contact with the tear during healing. The other procedures don’t rely on an intravitreal gas bubble as the primary maneuver. Cryopexy uses freezing to induce adhesion without injecting gas, scleral buckling relies on external indentation of the eye, and vitrectomy is the removal of the vitreous (often followed by gas tamponade postoperatively, but not defined by an initial intravitreal gas bubble injection to seal a tear).

Gas tamponade is used to press a retinal tear against the eye’s wall so that the tear can seal and the retina reattach. In pneumatic retinopexy, a small amount of air or expansile gas is injected into the vitreous cavity to form a bubble. This bubble floats and presses against the tear, allowing laser photocoagulation or cryopexy to create a firm chorioretinal adhesion around the break. The patient is then positioned so the bubble remains in contact with the tear during healing.

The other procedures don’t rely on an intravitreal gas bubble as the primary maneuver. Cryopexy uses freezing to induce adhesion without injecting gas, scleral buckling relies on external indentation of the eye, and vitrectomy is the removal of the vitreous (often followed by gas tamponade postoperatively, but not defined by an initial intravitreal gas bubble injection to seal a tear).