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R N Baker

Publications and source records attributed to R N Baker.

18 recordsLinked to original sources
PubMed1995

The effect of redeepening incisions on radial keratotomy outcome.

BACKGROUND: Patients scheduled to undergo radial keratotomy in both eyes received redeepening incisions in one eye and single pass incisions in the other. Eye and order of surgery were assigned randomly and surgical parameters were otherwise identical in the two eyes. METHODS: This study was designed to measured the improvements in myopia obtained by radial keratotomy, with and without redeepening incisions. RESULTS: There was a greater decrease in spherical equivalent manifest refraction in the redeepening group than in the control group at 1 week (0.41 D) and 1 month (0.36 D) after surgery, as measured by keratometry. The difference in change between groups was 0.41 D at one week, 0.36 D at 1 month, and 0.26 D at 3 months. Change in spherical equivalent was significantly more in the redeepened group at 3 months after surgery (0.37 D); however, the improvement constituted only 8.8 percent of the decrease in myopia achieved by radial keratotomy without redeepening (3.87 D). CONCLUSIONS: Although redeepening yields an incremental effect in the correction of myopia, the technical difficulties of redeepening and the increased chance of perforation of the cornea with redeepening outweigh the benefits of the procedure.

Adult↗
PubMed1967

Management of transient cerebral ischemic attacks.

Transient ischemic attacks (TIAs) are brief reversible episodes of neurological dysfunction due to temporary focal cerebral ischemia. Angiography should be performed only when operation is indicated or when the diagnosis is in doubt. Surgical treatment is recommended when the patient is a good surgical risk, when the stenosis is more than 70 per cent in the appropriate vessel and in certain patients with less severe stenotic lesions that appear to be a probable source of emboli. Anticoagulant therapy is indicated when there are recurrent TIAs, when the patient is not a good surgical candidate and when no appropriate surgically remediable lesion is found by angiography. If there is any significant contraindication to anticoagulants they should not be given. Discontinuance of anticoagulant therapy when the patient has been symptom-free for six months is recommended. In the experience of the authors the TIA syndrome is more benign in its course than was originally suspected and a conservative approach to surgical and anticoagulant therapy is recommended.

Aged↗