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Niall Patton

Publications and source records attributed to Niall Patton.

22 records · Page 2Linked to original sources
PubMed2004

Complete occlusion of the anterior capsular opening by fibrocellular membrane associated with retained silicone oil: a clinicopathologic correlation.

BACKGROUND: To report the clinicopathologic features of a fibrocellular membrane in a pseudophakic eye with retained silicone oil in the absence of any capsular contraction syndrome, necessitating repeat anterior capsulorhexis. METHODS: Clinicopathologic report of a case. RESULTS: Histopathologic study of the membrane showed absence of any true periodic acid Schiff-positive capsule within the specimen. Clinically, there was no evidence of any anterior capsular contraction. The fibrocellular membrane may have occurred as a result of inflammatory and mechanical effects of silicone oil in the anterior chamber or as a result of the intraocular lens design. CONCLUSION: The authors report the clinicopathologic features of a fibrocellular membrane occluding the anterior capsular opening in a pseudophakic eye with retained silicone oil, in the absence of any capsular contraction. The stimulus for its formation may have been the inflammatory and mechanical effects of retained silicone oil in the anterior chamber.

Adult↗
PubMed2004

Effect of volume used in sub-Tenon's anaesthesia on efficacy and intraocular pressure: a randomized clinical trial of 3 mL versus 5 mL.

PURPOSE: To compare the effect of volume used in sub-Tenon's anaesthesia on efficacy and intraocular pressure (IOP). METHODS: A prospective, randomised clinical trial was conducted on 52 eyes of 52 consecutive patients undergoing sub-Tenon's anaesthetic for cataract surgery. Eyes were randomly assigned to either 3 mL or 5 mL volume of anaesthetic solution (0.5% bupivacaine/2% lidocaine in a 50:50 mixture). The main outcome measures were akinesia 5 min post-administration of anaesthetic, changes in IOP immediately after and 5 min after anaesthetic administration, and patient pain perception during procedure. RESULTS: The level of kinesia was greater in the 3 mL group (n = 25) compared to the 5 mL group (n = 27) (P = 0.001, Mann-;Whitney U-test). There was no significant difference in pain perception between the two groups (P = 0.464, student t-test). Although there was great variation in IOP changes following sub-Tenon's anaesthetic, there was a trend for a larger rise in mean IOP immediately after anaesthetic administration in the 5 mL group (mean +/- SD +5.6 +/- 4.2 mmHg) compared to the 3 mL group (+4.3 +/- 3.8 mmHg), but this did not reach statistical significance (P = 0.25, student t-test). CONCLUSIONS: A 5 mL volume of anaesthetic provides akinesia superior to a 3 mL volume in sub-Tenon's anaesthesia for cataract surgery.

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