The British journal of ophthalmology
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Randomized Controlled Trial Comparative Study Clinical Trial
Ramosetron compared with granisetron for the prevention of vomiting following strabismus surgery in children.
Postoperative vomiting occurs frequently after strabismus surgery in children. Granisetron, a selective 5-hydroxytryptamine type 3 receptor antagonist, is effective for the prevention of vomiting following paediatric strabismus surgery. Ramosetron, another new antagonist of 5-hydroxytryptamine type 3 receptor, has more potent and longer acting properties than granisetron against cisplatin induced emesis. This study was undertaken to compare the efficacy and safety of granisetron and ramosetron for the prevention of vomiting following strabismus surgery in children. ⋯ Prophylactic antiemetic therapy with ramosetron is comparable with granisetron for the prevention of vomiting during 0-24 hours after anaesthesia in children undergoing strabismus surgery. During 24-48 hours after anaesthesia, ramosetron is more effective than granisetron for prophylaxis against postoperative vomiting.
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To investigate the predictive value of the cone b-wave implicit time in the photopic compared with the scotopic 30 Hz flicker ERG for rubeosis in central retinal vein occlusion. ⋯ The photopic cone b-wave implicit time in the 30 Hz flicker ERG is a good predictor for rubeosis.
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Randomized Controlled Trial Clinical Trial
Sub-Tenon's local anaesthesia: the effect of hyaluronidase.
A prospective, randomised, double blind study was used to investigate the effect of hyaluronidase on the quality of block achieved with sub-Tenon's local anaesthesia. ⋯ The addition of hyaluronidase significantly improves the quality of the motor blockade achieved with sub-Tenon's local anaesthesia, but has no effect on the sensory blockade.
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Randomized Controlled Trial Clinical Trial
Oxygen application by a nasal probe prevents hypoxia but not rebreathing of carbon dioxide in patients undergoing eye surgery under local anaesthesia.
Hypoxia and carbon dioxide rebreathing are potential problems during eye surgery in spontaneously breathing patients. The aim of the present study was to determine effectiveness of nasal application of oxygen to prevent hypoxia and carbon dioxide accumulation in spontaneously breathing patients undergoing cataract surgery. ⋯ Nasal application of oxygen prevented hypoxia but did not prevent carbon dioxide accumulation in patients undergoing eye surgery under retrobulbar anaesthesia. Additionally, as a side effect when using nasal probes, irritation of the nose was described in half of the patients investigated.
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Clinical Trial Controlled Clinical Trial
Prevention of visual field defects after macular hole surgery.
The pathogenesis of visual field loss associated with macular hole surgery is uncertain but a number of explanations have been proposed, the most convincing of which is the effect of peeling of the posterior hyaloid, causing either direct damage to the nerve fibre layer or to its blood supply at the optic nerve head. The purpose of this preliminary prospective study was to determine the incidence of visual field defects following macular hole surgery in cases in which peeling of the posterior hyaloid was confined only to the area of the macula. ⋯ The results from this preliminary study suggest that the complication of visual field loss after macular surgery may be reduced if peeling of the posterior hyaloid is confined to the area of the macula so that the hyaloid remains attached at the optic nerve head. The postoperative clinical course does not appear to differ from eyes in which a complete posterior vitreous detachment has been effected during surgery.