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[Microtrebeculectomy in glaucoma].

OBJECT
To study the clinical effectiveness of microtrabeculectomy.


METHODS
Of 80 patients (80 eyes) with various types of glaucoma, 40 (40 eyes) underwent microtrabeculectomy. The scleral flap measures 2 mm x 2 mm. The rectangular resection of trabeculum measures 1 mm x 1 mm. And 40(40 eyes) underwent standard trabeculectomy with the scleral flap measuring 3 mm x 4 mm and the resection of trebeculum measuring 1.0 mm x 3.0 mm. Vision acuity, intraocular pressure (IOP) measurements, slit lamp examinations and opthalmicroscope examinations were performed before surgery and after surgery at one, two, eight and 15 days, and one, two, three, six, nine, 12, and 18 months.


RESULTS
The mean preoperative IOP was 44.11 +/- 14.86 mmHg(1 mmHg = 0.133 kPa) for microtrabeculectomy and 46.45 +/- 11.27 mmHg for standard trabeculectomy. The mean postoperative IOP and operative complications were similar between the two groups. The mean postoperative IOP was 12.94 +/- 4.13 mmHg for the group with microtrabeculectomy and 13.51 +/- 3.56 mmHg for the group with standard trabeculectomy at the end of follow-up (12-18 months). The incidence of shallow anterior chamber was 16% (6/40) in micro group, while it was 2.6% (1/40) in the other group. There was no significant difference between the two groups(X2 = 1.59 < 3.84, P > 0.05).


CONCLUSION
Microtrabeculectomy appears to provide reasonable control of IOP.