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Biomedical subjects

E Wilkinson

Publications and source records attributed to E Wilkinson.

50 records · Page 3Linked to original sources
PubMed1986

Microsurgical endarterectomy under barbiturate protection: a prospective study.

Carotid endarterectomy has the potential to improve on the natural history of untreated carotid artery disease with respect to subsequent infarction in symptomatic patients with causative angiographic lesions. This benefit of a reduced risk of stroke can be realized only if the perioperative morbidity and mortality rates are kept low. An approach to symptomatic carotid artery bifurcation disease is outlined, with a defined protocol of microsurgical endarterectomy utilizing barbiturate protection during the period of potential focal temporary cerebral ischemia. This protocol includes preoperative antiplatelet therapy, barbiturate anesthesia, the avoidance of an internal shunt, the use of the operating microscope, and strict control of postoperative hypertension. A series of 200 consecutive endarterectomies performed within this protocol in 180 patients and the resultant combined permanent morbidity and mortality rate of 1.5% are reported.

Adult↗
PubMed1985

24-Hour urine protein/creatinine ratio in dogs with protein-losing nephropathies.

The 24-hour urine protein/creatinine (U[P/C]) ratio was examined in 19 healthy dogs and in 38 dogs with protein-losing nephropathies. A positive correlation existed between the U(P/C) ratio and the 24-hour urine protein output per kilogram of body weight. The U(P/C) ratio in 18 of 19 healthy dogs was less than 0.2; one dog had a ratio of 0.38. The median U(P/C) ratio in dogs with glomerulonephritis (n = 26) and amyloidosis (n = 6) was 5.73 and 22.50, respectively. The median U(P/C) ratio in dogs with chronic interstitial nephritis (n = 6) was 2.89. In the presence of hypoalbuminemia (albumin less than or equal to 1.5 g/dl), a U/(P/C) ratio greater than 1 indicated a nephrotic syndrome. Severe protein-losing nephropathies (ie, severe glomerulonephritis and amyloidosis) were characterized by U(P/C) ratios greater than 10 and urine protein values exceeding 159 mg/kg/day. The 24-hour U/(P/C) may be more sensitive than the 24-hour urine protein output per kilogram of body weight in the detection of mild glomerular disease. Abnormal U(P/C) ratios were present in 5 dogs, 2 with glomerulonephritis and 3 with chronic interstitial nephritis; that had normal or mildly increased 24-hour urine protein output.

Amyloidosis↗
PubMed1983

Interviews with parents of boys suffering from Duchenne muscular dystrophy.

Parents from 53 families of boys with Duchenne muscular dystrophy were interviewed to explore their reactions to the diagnosis and the effects of the disease on family life. The findings are discussed in terms of the problems reported by the parents, their experiences at the time of diagnosis, their views on neonatal screening, the effects on the marital relationship, on siblings and on the affected boys themselves, and the parents' need for better information about the disorder.

Adolescent↗
PubMed1980

Mammography at reduced doses: present performance and future possibilities.

Reduced dose mammography is assessed with the aid of very recent work. It is concluded that there are technical and clinical reasons for believing that the reduced dose systems and their interpreters should perform more effectively than their predecessors. Review of known technologic achievements suggests a possible 6 to 7 reduction factor from present screen-film mammography dose levels without sacrificing image quality. Reasonable estimates of representative doses presently achieved by both xeroradiography and screen-film systems are given. The screen-film value is about 3 times higher than some previous estimates for these systems.

Adult↗
PubMed1978

Optimization of electrostatic imaging systems for minimum patient dose or minimum exposure in mammography.

The x-ray photon energies that give the highest signal-to-noise ratios per unit of exposure or average dose in mammography are significantly greater than those used in current film/screen systems. Optimum photon energies for detection of calcifications in a range of thicknesses of water and fat were calculated. Soft-tissue targets were also considered. Comparison of the theoretical results and those obtained experimentally with the Stanton mammography phantom indicate that operation at less than optimum photon energies is a major cause of inefficiency in film/screen mammography. On the other hand, electrostatic imaging systems, because of their processing flexibility, can operate at the optimum photon energy levels, thus minimizing either dose or exposure.

Elementary Particles↗
PubMed1978

Resolution of muscle calcification in rhabdomyolysis and acute renal failure.

We studied four patients with acute renal failure associated with nontraumatic rhabdomyolysis to evaluate the presence and progression of calcium deposits in damaged muscle tissue. Conventional and electron radiography and technetium-99m diphosphonate (TcDP) scans were done during the oliguric phase of acute renal failure and repeated after renal function returned to normal. Three patients showed deposits of calcium by conventional radiography and all by electron radiography and TcDP during the oliguric period. When the patients recovered renal function and muscle injuries healed, calcium deposits disappeared. The results show that calcium deposits in damaged muscle occur during the oliguric phase of acute renal failure due to rhabdomyolysis and the calcification disappears with recovery of renal failure; and TcDP scans are the most sensitive method of detecting calcium deposits in these patients.

Acute Kidney Injury↗
PubMed1977

Preliminary studies using electron radiography for mammography.

An electron radiography mammography system was used for phantom studies and to obtain 230 craniocaudal view patient studies, of which 140 were compared to xeroradiographs for their ability to visualize 7 features of diagnostic importance. The average exposure of the electron radiographs was 89 mR. The technique was considered equal or superior to xeroradiography in 58% of the compared diagnostic features, while patient dose was reduced.

Breast Neoplasms↗
PubMed1976

Pathogenesis of microglandular hyperplasia of the cervix uteri.

Microglandular hyperplasia of the cervix has commonly been associated with pregnancy and oral contraceptive use. In a review of 22 cases seen over the last 10 years, 6 of the cases were not associated with hormonal changes. The idiopathic presentation of this lesion is reviewed. Microglandular hyperplasia of the cervix mimicking clear cell carcinoma of the cervix occurred in a 26-year-old woman with a history of in utero stilbestrol exposure who was taking an oral contraceptive. The differentiation of these two unusual lesions of the cervix is discussed.

Adenocarcinoma↗