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Biomedical subjects

J H Sheets

Publications and source records attributed to J H Sheets.

At least 19 recordsLinked to original sources

Retrobulbar block using pentothal as a sedative for ambulatory cataract surgery.

Cataract surgery comprises 80% to 85% of the surgical procedures performed at our ambulatory surgical center. We have developed a safe and effective method of sedation and amnesia for performing a retrobulbar block. We use sodium thiopental, administered intravenously, just prior to the block. We encourage the anesthesia departments of other facilities to consider this relatively simple blocking procedure for the comfort and safety of the patient.

Adjuvants, Anesthesia

A model intraocular lens.

With so many different kinds of intraocular lenses from which to choose, the cataract surgeon is often faced with a difficult decision--which is the best lens for the patient. Although, there is no perfect intraocular lens, we attempt to delineate several desirable features. These include pliability, inert ultraviolet-filtering lens material, compact design, and posterior concavity to facilitate laser surgery. Successful blending of these features can make a well-tolerated intraocular lens.

Elasticity

The collagen eye patch: a preliminary report.

This study is a preliminary report on the use of freeze-dried-collagen eye patches in the treatment of a selected group of inflammatory eye conditions. The early responses to treatment have been encouraging in cases of allergic conjunctivitis, blepharitis, and pterygium. In addition, the collagen patches have exhibited a significant beneficial effect in the resolution of ectropion.

Adult

Neodymium: YAG laser posterior capsulotomy.

Posterior capsule opacification, caused by pearl formation or fibrosis, occurs commonly following cataract surgery. This paper presents results of a study of 367 Nd:YAG laser posterior capsulotomies and discusses both risks and benefits. Specific attention has been given to intraocular pressure (IOP), corneal endothelial cell integrity, and visual acuities. The average maximum induced IOP rise was 1.4 mm Hg and this occurred within one hour of the capsulotomy. The average corneal endothelial cell change was a loss of 7% or 115 cells/mm2. Visual acuity improved to better than 20/30 in 87.5% of patients.

Cataract Extraction

Vitreous wick syndrome following discission of the posterior capsule.

Discission of the posterior capsule frequently is performed by surgeons doing extracapsular cataract extraction and phacoemulsification. Two cases of the vitreous wick syndrome were noted six days and two weeks, respectively, after discission of the posterior capsule, and immediate surgical repair was done. It is important to be aware of the vitreous wick syndrome as a complication of posterior capsule discission because prompt diagnosis and surgical repair may prevent the development of bacterial endophthalmitis or epithelial downgrowth.

Aged

External application of an irrigating lens loop for extracapsular cataract extraction.

A modified irrigating lens loop applied externally to the eye may be used to express the nucleus in an extracapsular cataract extraction. No skill is required in subluxating the nucleus into the anterior chamber, as this maneuver is not necessary. The danger of posterior capsule rupture is diminished because no counter-pressure is applied and the lens loop is not placed in the eye. It is occasionally necessary to peak the pupil with forceps if it is not well dilated. We recommend this technique to simplify extracapsular cataract extraction and to markedly reduce the surgeon's risk of rupturing the posterior capsule.

Cataract Extraction

Pseudophakia in children: a review of results of eighteen implant surgeons.

Intraocular lenses are a wise choice in a limited number of traumatic cataracts. It is necessary, however, to evaluate the patient very closely preoperatively to be assured that preoperative problems associated with increased postoperative complication are not present. In the proper patient, these authors feel that implant surgery is indicated. It offers a satisfactory alternative to the occasional patient that would have a functionless or amblyopic eye with a contact lens. Although the patient with a contact lens may see well with the contact in place, many are not able to wear the contact lens long enough during the day to consider it a functional success. These authors stress the use of a lightweight two-loop iridocapsular lens with one stage surgery and a short interval between the development of the cataract and the operation. Contact lenses or aphakic glasses are safe and will suffice with bilateral congenital cataracts. At the present time, further experimentation is necessary to determine if intraocular lens placement in the two-month-old infant with a unilateral congenital cataract will be safe and wil restore vision.

Adolescent

Lens glide in implant surgery.

The lens glide is a disposable, sterile piece of Silastic that is designed to make insertion of intraocular lenses safer and simpler. Since the use of the lens glide has become part of our routine surgical procedure in implant surgery, there has been a notable reduction in vitreous loss and in postoperative corneal problems.

Cataract Extraction

A step beyond ECCE.

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Cataract Extraction