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Biomedical subjects

M J Cartwright

Publications and source records attributed to M J Cartwright.

31 records · Page 2Linked to original sources
PubMed1992

Orbital diagnosis and imaging.

A myriad of imaging modalities now exists to aid in the diagnosis of orbital disease. Most of the recent advances in orbital diagnosis are based on refinements of established techniques, although several represent the application of new technology. Invasive techniques, such as orbital arteriography and venography, have been supplanted with computed tomography, which has become the mainstay of orbital diagnosis. The use of magnetic resonance imaging in the assessment of orbital pathology has also increased. Color Doppler, a recent development in ultrasonography, has now been applied to the eye and orbit.

Biopsy↗
PubMed1992

Tension pneumocephalus associated with rupture of a middle fossa encephalocele. Case report.

Acquired nontraumatic (spontaneous) encephaloceles of the middle fossa are not common. Rupture of an encephalocele frequently leads to a cerebrospinal fluid fistula. Tension pneumocephalus consequent to rupture of an encephalocele has not been previously reported, but conceivably occurs by means of a ball-valve mechanism in the ensuing fistulous tract. An unusual case is presented of an elderly man who suffered acute life-threatening neurological symptoms from a tension pneumocephalus that likely developed from rupture of an acquired nontraumatic encephalocele of the left middle fossa. The symptoms correlated with the location of the intracranial abnormalities. The literature is reviewed and the pathophysiology of the lesion is discussed.

Aged↗
PubMed1992

Oculocardiac reflex in the anophthalmic socket.

The oculocardiac reflex occurred in a patient with an anophthalmic socket undergoing surgery for inferior fornix shortening and laxity of the lower lid. This reflex occurs only rarely in anophthalmia; it has not been previously reported during socket surgery.

Aged↗
PubMed1991

Acute retinal necrosis: an unusual presentation.

Acute retinal necrosis (ARN) is a visually devastating disease consisting of necrotizing retinitis in healthy patients. The retinitis usually begins in the midperiphery to periphery and may spread to the posterior pole. Milder cases of ARN involving the posterior pole have been described. However, these cases never progress to full-blown ARN and have relatively good visual outcomes. A case is reported of a young, white woman with ARN that originally presented in the posterior pole. Unlike mild cases, spread to the midperiphery and periphery ensued until full-blown ARN occurred. This disease may present not only as an acute mid-peripheral to peripheral retinitis, but it also must be considered in the differential diagnosis of patients with multifocal, punctate areas of retinitis in the posterior pole.

Adult↗
PubMed1991

Leber's idiopathic stellate neuroretinitis.

Leber's idiopathic stellate neuroretinitis, originally known as Leber's stellate maculopathy, is an uncommon syndrome characterized by unilateral optic disc swelling followed by the development of a macular star due to leakage of capillaries within the optic disc. It is seen in patients 50 years of age or younger and usually resolves spontaneously without visual sequelae. This entity should be recognized and distinguished from more serious diseases causing septic neuroretinitis or papillitis. We present a case which was initially thought to be septic retinitis.

Adult↗
PubMed1990

Krypton laser-induced lens opacity as a complication of retinal photocoagulation.

Lens opacification is a well-documented complication of argon laser photocoagulation, particularly in eyes with preexisting cataracts. In eyes with media opacity, the krypton laser is frequently used for its superior penetrating qualities. To date, lens opacification from krypton application has not been documented. We report such a case in a cataractous eye with a vitreous hemorrhage undergoing panretinal photocoagulation. Factors previously implicated in the etiology of laser-induced lens damage were not present. The opacities were similar to those produced by the argon laser. We present a mechanism for understanding laser-induced lens damage and speculate on the difference between the interaction of argon versus krypton laser energy with lens constituents.

Cataract↗
PubMed1990

Anterior segment ischemia: a complication of retinal detachment repair in a patient with sickle cell trait.

Anterior segment ischemia (ASI) is a dreaded complication of retinal detachment surgery particularly in patients with predisposing factors such as sickle cell disease. We report a case of ASI after scleral buckling in an otherwise healthy black patient with sickle cell trait. Conditions of relative hypoxia intraoperatively from either anesthesia or surgical manipulation may precipitate vasoocclusive phenomena in these normally asymptomatic patients. Since the incidence of sickle cell trait in the black population in the United States is 8.5%, we recommend these patients have a preoperative sickle test followed by hemoglobin electrophoresis with quantification if positive. The presence of sickle cell trait should alert the surgeon to the risk of ASI, and factors predisposing to hypoxia should be minimized when possible.

Anterior Eye Segment↗
PubMed1988

Correlation of asymmetric damage with asymmetric intraocular pressure in normal-tension glaucoma (low-tension glaucoma).

If intraocular pressure plays a role in producing visual field loss in normal-tension glaucoma, there may be a possible benefit from therapeutic efforts to lower the pressure. To see whether pressure plays a role in the production of damage, we studied 14 cases of normal-tension glaucoma with asymmetric intraocular pressure (1- to 6-mm Hg interocular difference in pressure). In 12 of these 14 cases, we found that glaucomatous cupping and field loss (damage) was greater in the eye with higher pressure. This statistically significant correspondence of the higher pressure with the greater visual damage suggests that the level of pressure is a factor in producing optic nerve damage. Other factors also must contribute to account for the few instances in which damage asymmetry did not reflect interocular pressure-difference and for the occurrence of injury at such low levels of pressure in the first place. Although benefit may be expected from therapeutic lowering of pressure in this condition, the degree of benefit, as well as the side effects from treatment required for successful lowering of pressure, remains to be documented by a future clinical trial.

Glaucoma↗
PubMed1985

Synovial cyst of a cervical facet joint: case report.

Intraspinal synovial cysts are rare. Those reported have occurred in the lumbar region. We report a case of an extradural true synovial cyst of the cervical spine causing spastic paraparesis. The cyst occurred after a cervical spine fracture and, hence, was probably related to trauma. Surgical therapy resulted in a satisfactory recovery.

Adult↗