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ORIGINAL ARTICLE
Year : 1999  |  Volume : 47  |  Issue : 4  |  Page : 237-240

Retained viscoat and intraocular pressure after phaceomulsification


Department of Ophthalmology, Singleton Hospital, Swansea, UK

Correspondence Address:
P Watts
Department of Ophthalmology, Singleton Hospital, Swansea, UK

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Source of Support: None, Conflict of Interest: None


PMID: 10892480

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Purpose: A single blind prospective randomised study to determine the effect of Viscoat retained in the eye on intraocular pressure (IOP) after phacoemulsification. Methods: 82 patients were randomly selected to receive either Viscoat, a viscoelastic composed of 3% sodium hyaluronate (mol wt 500,000 daltons), and 4% chondroitin sulfate (mol wt 25,000 daltons) or Provisc, a viscoelastic compound composed of 1% sodium hyaluronate (mol wt 4,00,000 daltons) during phacoemulsification. In those patients receiving Viscoat the viscoelastic in the anterior chamber only was removed, whereas in those receiving Provisc attempts were made to remove the material entirely. The IOP was measured on the first postoperative day, 16-20 hours after surgery. Results: The mean postoperative IOP in the Viscoat group was 22.37 9.0 mmHg and in the Provisc group was 19.67 6.95 mmHg. Five patients in the Viscoat group had pressure elevations above 30 mmHg as opposed to three in the Provisc group. Conclusions: The two viscoelastics cause equivalent pressure elevations postoperatively. In the Viscoat group there were five patients with IOPs above 30 mmHg. We recommend that Viscoat should be aspirated from both the anterior chamber and the capsular bag following routine phacoemulsification.


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