Biomedical subjects
Publications and source records attributed to A D Steele.
An account is presented of the early experiences with the use of visco elastic materials in keratoplasty. Materials used have been sodium hyaluronate ('Healonid') and 1 per cent and 2 per cent solutions of hydroxypropyl methylcellulose. The surgical methods and the initial results have been outlined. The freedom from any short term or intermediate complications is noteworthy.
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We designed and successfully used a new headrest for ophthalmic microsurgery. The symmetrical instrument has a U-shaped frame and is designed to be clamped to an operating table as a projecting extension. The headrest has been satisfactory for patients having either general or local anesthesia, and particularly useful for vitreous surgery with the Zeiss Mark VI microscope; this headrest gives excellent control over the visual field and eliminates all extraneous movement.
In recognition of the many inexactitudes involved in cutting donor corneal discs, a new instrument is here described which should help to eliminate many of then, and its mode of use is outlined. For a long time instruments available to assist the corneal surgeon in his management of donor material have been inadequate. Many devices are awkward to use, or give rise to donor discs of an unreliable or uneven edge profile. In an attempt to overcome these difficulties we have designed, produced and tested a new instrument which we feel represents an advance. Because different surgeons use fresh or stored material, and because some prefer to trephine from the epithelial surface while others opt to punch from the endothelium, we have endeavoured to meet all these requirements.
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