Abstract：
PURPOSE:To explore the impact of intracameral air tamponade pressure and duration on graft attachment and rebubbling rates. DESIGN:A prospective, interventional, nonrandomized study. METHODS:setting: Department of Ophthalmology, Charité - Universitätsmedizin Berlin. STUDY POPULATION:One hundred seventeen patients who underwent Descemet membrane endothelial keratoplasty (DMEK). OBSERVATION:Intraocular pressure (IOP) at the end of the surgery, immediately after filling the anterior chamber with air, categorized into low (<10 mm Hg), normal (10-20 mm Hg), and high (>20 mm Hg), and the time until partial removal of the air. MAIN OUTCOME MEASURES:Rebubbling rates and endothelial cell density over a 3-month follow-up period analyzed by a multivariable Cox regression model and an analysis of covariance model. RESULTS:Thirty-two patients required a rebubbling (27% [95% CI 19%-35%]). Nine patients required more than 1 rebubbling (7% [95% CI 3%-12%]). Compared with normal IOP, lower (HR 8.98 [95% CI 1.07-75.41]) and higher IOP (HR 10.63 [95% CI 1.44-78.27]) increased the risk of requiring a rebubbling (P = .006). Independent of the IOP, an air tamponade duration beyond 2 hours reduced the risk of rebubbling (HR 0.36 [95% CI 0.18-0.71, P = .003]). One month after surgery, the mean endothelial cell loss was 13% (95% CI 2%-25%) and 23% (95% CI 17%-29%) in the group with air tamponade duration of below and above 2 hours, respectively (P = .126). At 3 months after surgery, it was 31% (95% CI 17%-42%) and 42% (95% CI 32%-52%) in the respective groups (P = .229). CONCLUSIONS:A postsurgical air tamponade of at least 2 hours with an IOP within the physiological range could help to reduce rebubbling rates.
journal_name
Am J Ophthalmoljournal_title
American journal of ophthalmologyauthors
Pilger D,Wilkemeyer I,Schroeter J,Maier AB,Torun Ndoi
10.1016/j.ajo.2017.03.021subject
Has Abstractpub_date
2017-06-01 00:00:00pages
122-128eissn
0002-9394issn
1879-1891pii
S0002-9394(17)30129-0journal_volume
178pub_type
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