PubMed · 9499766
The source did not provide an abstract. Follow the original record for more information.
Explore connections, maps & timelines
T W Perkins, M Fisher. 1998. When is "final"?. https://doi.org/10.1016/s0161-6420(98)93017-2
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
Explore the source record for details and available documents.
PURPOSE: To examine the effect of digital ocular pressure (DOP) on the intraocular pressure (IOP) of eyes 3 months or longer after successful glaucoma filtering surgery. METHODS: Fifteen patients participated in this study. Each had one eye with a successful filtering operation (IOP < or = 21 mmHg without medications) and a fellow eye that was not operated on, which served as a control. The authors measured IOP in both eyes before and serially after DOP until return to baseline or for 3 hours to determine the amounts and durations of reductions. The authors monitored changes of bleb morphology and searched for complications. RESULTS: Digital ocular pressure 3 months or more after successful filtering surgery reduced IOP by approximately 50% of baseline. The time after DOP for 50% of eyes to have intraocular pressure return to within 2 mmHg of baseline was 95 minutes; 40% recovered within 20 minutes and 30% had not recovered by 3 hours. Eyes with localized blebs recovered faster than did eyes with diffuse blebs. Transient shallowing of the anterior chamber developed in one eye. Otherwise, there were no adverse effects. Time since surgery and baseline IOP were not correlated with response. Fellow eyes had minimal response to DOP and recovered within 30 minutes. CONCLUSION: This study shows that a substantial, transient decrease of IOP after DOP occurs in glaucomatous eyes with a well-functioning bleb 3 months to 6 years after filtering surgery. The duration exceeds 90 minutes in more than 50% of the eyes tested and 180 minutes in more than 30% of the eyes tested.
PURPOSE: To examine the management and possible causes of primary valve malfunction of the Krupin eye valve with disk. METHODS: The authors reviewed the results of 113 patients undergoing implantation of the Krupin eye valve with disk and identified eight patients with primary valve malfunction requiring surgical revision. RESULTS: Valve revision involved manipulation (n = 1 case), explantation of the malfunctioning valve and implantation of a new valve (n = 2), and amputation of the valve (n = 5). Six of eight patients had final intraocular pressures of < 21 mmHg on one or no medications at a mean interval of 15.9 months (range 5-36) after surgical revision. Transient postoperative hypotony was noted in three patients and chronic hypotony with loss of light perception in one patient. One explanted valve was examined and found to have partially fused leaflets. CONCLUSIONS: Surgical revision in cases of primary valve malfunction of the Krupin eye valve with disk may be accomplished relatively safely with an acceptable level of postoperative complications. The etiology of primary valve malfunction may be related to the sterilization process and prolonged storage before implantation.