PubMed Health⌕ Search

Biomedical subjects

S A Perkins

Publications and source records attributed to S A Perkins.

7 recordsLinked to original sources
PubMed1999

The laser-assisted capsular shift procedure on an intercollegiate volleyball player: a case report.

OBJECTIVE: To present a new arthroscopic technique, the laser-assisted capsular shift (LACS), which decreases glenohumeral instability and reduces recovery time over traditional surgical procedures. BACKGROUND: A student-athlete hyperabducted her right shoulder while diving for a ball during a volleyball match. She complained of pain, weakness, and inability to raise her arm above shoulder height in any plane. DIFFERENTIAL DIAGNOSIS: Capsular sprain, subluxation, rotator cuff strain, glenoid labral lesion. TREATMENT: The student-athlete was unable to play due to pain and dysfunction and so elected to have the LACS procedure performed. UNIQUENESS: The LACS procedure is a relatively new procedure for tightening the capsule and decreasing glenohumeral instability. Immobilization and recovery time are reduced when compared with traditional treatment methods. CONCLUSIONS: The LACS procedure appears to be a good alternative to some of the traditional methods used to treat glenohumeral instability.

Journal Article↗
PubMed1998

Laser in situ keratomileusis for myopia and astigmatism: 6 month results.

PURPOSE: To evaluate the visual and refractive results of laser in situ keratomileusis (LASIK) for mild to moderate myopia with or without astigmatism. SETTING: Barnet-Dulaney Eye Center, Phoenix, Arizona, USA. METHODS: Data were prospectively collected on 124 consecutive eyes having LASIK over 12 weeks. Eyes with a preoperative spherical equivalent (SE) from -1.35 to -10.00 diopters (D) (mean -4.81 D +/- 2.21 [SD]) and cylinder from 0 to 5.00 D (mean 1.12 +/- 1.12 D) were entered in the study. Thirty-one eyes had spherical corrections. Ninety-three eyes had spherocylinder corrections; preoperative astigmatism in these eyes ranged from 0.50 to 5.00 D (mean 1.47 +/- 1.09 D). Surgery included creation of a corneal flap using an automated microkeratome with a 160 microns plate followed by photoablation on the exposed stromal bed. Photoablation was performed using five zones varying from 5.0 to 6.6 mm in eyes with 6.25 D of myopia or less and with five passes at a 5.0 mm zone in eyes with 6.50 D of myopia or more. Astigmatism was corrected using a single-pass ablation through a 6.0 mm slit of varying diameter. RESULTS: Six month follow-up was obtained in 89 eyes (72%). All eyes were completely re-epithelialized by the first postoperative day. Uncorrected visual acuity was 20/40 or better in 81% of eyes at 1 day and in 91% at 6 months. At 6 months, the mean SE was -0.35 +/- 0.77 D; 83% were within +/- 1.00 D of plano. Postoperative astigmatism in the 93 eyes having cylinder correction ranged from 0 to 1.22 D (mean 0.38 +/- 0.42 D). No eye lost more than two lines of best spectacle-corrected visual acuity. Three eyes (2%) required surgical intervention for cap problems. Visually significant corneal haze was not observed. CONCLUSION: In eyes with myopia with or without astigmatism, LASIK provided rapid visual recovery with satisfactory visual and refractive outcomes. The effect of LASIK on visual function (night glare, contrast sensitivity) awaits further study.

Adult↗
PubMed1988

Resolved incomplete central retinal-artery obstruction simulating ischemic optic neuropathy.

To our knowledge, this is the first reported case of an embolic three-fourths central retinal-artery obstruction with isolated sparing of the superior temporal branch artery. Multiple nonfoveolar-sparing cilioretinal arteries were also present. As a result of the unusual obstruction distribution, ischemic optic neuropathy was simulated after a five-month interval. Patients who are not seen acutely after a retinal-artery obstruction may be diagnosed and managed incorrectly if this variation from the usual condition is not recognized.

Aged↗
PubMed1987

The idling retina: reversible visual loss in central retinal artery obstruction.

Based on experimental studies, sustained total central retinal artery obstruction (CRAO) lasting more than one and one-half hours has been considered to cause irreversible retinal damage. We have seen five cases of patients with pure CRAO that lasted longer than one and one-half hours who regained significant visual acuity. Three of the patients had a completely spontaneous improvement in visual acuity to 20/50 or better. In addition, the other two patients regained significant vision to 20/80 or better with a modified treatment regimen of acetazolamide, inhalation of 5% CO2 and 95% O2, and aspirin. No foveola-sparing cilioretinal arteries were present in any of the cases. We introduce the concept of reversible retinal ischemia following unsustained CRAO to account for these unexpected improvements in visual acuity.

Acetazolamide↗
PubMed1985

Arteriovenous malformations of the iris.

This is the first report in the American literature elaborating on the clinical and angiographic characteristics of an iris arteriovenous malformation. Iris vascular abnormalities that do not leak fluorescein have previously been described only in association with underlying disorders. Iris arteriovenous malformations must be differentiated from neovascularization and other diseases affecting iris vasculature in which treatment is necessary in order to prevent further sequelae.

Arteriovenous Malformations↗