Original articleComparison of Face-Down and Seated Position After Idiopathic Macular Hole Surgery: A Randomized Clinical Trial
Section snippets
Methods
A prospective, interventional, comparative and randomized clinical trial was conducted in 150 eyes of 144 consecutive patients undergoing MH surgery in two academic centers between July 1, 2004 and January 31, 2006. Patients had complete information about the study and the risks of the surgical procedure, especially retinal detachment (RD), and gave their written consent before surgery.
Patients with stage 2, 3, and 4 idiopathic MHs according to Gass1 and confirmed by optical coherence
Results
One hundred and fifty eyes were included in this prospective series; patient characteristics are given in Table 1. The intraocular gases used are given in Table 2. The minimum follow-up was six months (mean, 15 months; range, six to 25). Overall, 92.7% of the MHs were closed with one operation (139 anatomic successes out of 150 idiopathic MH surgeries). For the P0 group, the anatomic success rate was 87.5% (63/72) vs 97.4% (76/78) for the P1 group. The difference between P0 and P1 was
Discussion
Proper idiopathic MH management requires that the edges of the hole be kept dry with the gas tamponade and the closure of the hole be achieved within a few days.
Intraocular gas tamponade has two main properties: surface tension and buoyancy.22, 25 Buoyancy is related to density and surface tension is related to the viscosity of the tamponade product. The surface tension is constant around the entire interface with the retina. The buoyant force is maximal at the apex of the bubble depending on
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