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Biomedical subjects

S P Percival

Publications and source records attributed to S P Percival.

At least 37 records · Page 2Linked to original sources
PubMed1985

Glaucoma triple procedure of extracapsular cataract extraction, posterior chamber lens implantation, and trabeculectomy.

Thirty-four consecutive glaucoma triple procedures with a minimum follow up of six months have been shown to be effective and safe. Satisfactory control of the glaucoma was achieved in each case, and 91% of eyes were returned to an acuity of 6/12 or better. 1% sodium hyaluronate was found to be beneficial by preventing scleral or corneal collapse during surgery and ensuring an even filtration postoperatively without hypotony.

Aged↗
PubMed1985

Long term complications from extracapsular cataract surgery.

Long term follow up of extracapsular extraction showed visual results superior to those previously reported for intracapsular extraction. Ninety-six per cent of 197 eyes examined five years after extracapsular extraction with capsule supported lens implantation had a visual acuity of 6/12 or better. Of the 498 cases examined three years after surgery, including eyes without implants, 93 per cent had a visual acuity of 6/12 or better. Complications were rare provided the posterior capsule remained intact. Forty-five per cent of eyes without implants had required secondary capsulotomy within three years of surgery, compared with 11 per cent of eyes in which Binkhorst lenses had been used. Only 27 per cent of the eyes with Binkhorst lenses examined seven years after surgery were found to have required secondary capsulotomy. Opening of the capsule was seen to increase the risk of sight threatening complications, in particular of retinal detachment in high myopes. Implantation of posterior chamber lenses appeared to reduce the need for capsulotomy even further and it is suggested that their use in high myopia may help to lessen the chance of retinal detachment.

Adult↗
PubMed1985

Sodium hyaluronate in perspective: experiences from a four-year clinical trial.

Analysis of the safety from the use of 1 per cent sodium hyaluronate (Healonid) is presented in terms of postoperative ocular hypertension, uveitis, visual acuity and endothelial cell loss. The results of a four-year clinical trial confirm that this product is safe and effective. There was no significant difference in the short term visual results from its use, however on assessment of comparative endothelial cell studies, it was found that incidences of severe cell loss tend to be excluded by the use of Healonid so improving the surgeons confidence in difficult surgical situations.

Adult↗
PubMed1983

Sodium hyaluronate in cataract and intraocular lens surgery.

The use of sodium hyaluronate in 383 cases of Cataract extraction with primary lens implantation has been to be effective, non-toxic and safe. Chief uses are to protect the corneal endothelium during nucleus extraction and to maintain the anterior chamber depth during lens implantation and during iris suturing. It is important not to use excessive amounts and to dilute with miochol or salt solution during wound closure. Using these techniques sodium hyaluronate was found to be free from side effects and when timolol maleate was used b.d. from the close of surgery the incidence of postoperative ocular hypertension was found to be no different from that in a control group. Endothelial cell studies showed a cell loss of 13 per cent to be within the range previously established for intracapsular cataract surgery without lens implantation, and support a widening conviction that lens implantation may now be regarded as a safe procedure.

Adult↗
PubMed1977

Results after intracapsular extraction: the atonic pupil.

Satisfactory visual results are reported in a series of 80 consecutive patients who underwent intracapsular cataract extraction with a four- or three-loop Binkhorst lens replacement. Nearly 50% of patients could see 20/30 or better unaided. However, results in the under 70 age group tend to be marred by macular edema, and in the over 80 age group by corneal edema, the latter occasionally being the result of lens instability because of an atonic pupil.

Aged↗