Pneumatic trabecular bypass (PTB): pilot study.
OBJECTIVE
To evaluate the initial efficacy of Pneumatic trabecular bypass (PTB) for open angle glaucoma patients.


METHODS
Prospective case series study.


METHODS
Ten eyes of 10 patients meeting the inclusion criteria had been operated for PTB. Patients were evaluated regarding to their intraocular pressure (IOP) and glaucoma medication score. They underwent regular follow-up starting with 1 day, reducing to 1 week, 1 month, and finally monthly for 6 months.


RESULTS
Preoperative IOP ranged from 25 to 38 mm Hg with mean 30.9 mm Hg (SD 3.78) and medication score was 2.6 (SD 0.52). After 6 months, the mean IOP was 16.6 mm Hg (SD 4.43) and medication score decreased to 0.5 (SD 0.97). The percentage of IOP reduction ranged from 20% to 57.6%, mean 43.46% (SD 13.92). A rise in IOP was recorded in all cases between weeks 2 and 6. Total success was achieved in 70%, whereas qualified success was in 20%.


CONCLUSIONS
There is an initial effectiveness for the procedure. The Schlemm canal rupturing pressure needs more detailed analysis.
Faculty of Medicine, Ophthalmology Department, Cairo University, Cairo, Egypt. eldaly_mohamed@yahoo.com
Mohamed A
MA
Eldaly
D000328:Adult; D000368:Aged; D000388:Air; D005260:Female; D005902:Glaucoma, Open-Angle / Q000503:physiopathology / Q000601:surgery*; D006068:Gonioscopy; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D011312:Pressure; D011446:Prospective Studies; D014065:Tonometry, Ocular; D014129:Trabecular Meshwork / Q000601:surgery*; D014130:Trabeculectomy / Q000379:methods*; D016896:Treatment Outcome