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Biomedical subjects

J M Lyons

Publications and source records attributed to J M Lyons.

59 records · Page 4Linked to original sources
PubMedDate not supplied

Home parenteral nutrition with full-time home care nurses.

A group of patients exists who cannot manage home parenteral nutrition (HPN) due to debilitating conditions and/or lack of family resources. They are limited to either nursing home placement or extended hospitalization unless home nursing care is provided. A 58-year-old single female with malabsorption secondary to scleroderma was sent home on cyclic HPN under the supervision of full-time home care nurses. A comprehensive patient-centered nurse training program was designed to teach nursing personnel from a private nursing service the theory and practice of HPN. Each nurse must achieve at least 80% in the theory posttest and demonstrate the competent performance of central venous catheter care, mixing of parenteral nutrition solutions, use of infusion pump, and application of the heparin lock. The results of the pre- and posttests have shown that the home care nurses have been able to learn the theory necessary for implementing HPN. The mean pretest value was 46% while the mean posttest value was 90% (n = 12, p = 0.01). The patient has been doing very well at home for 5 months in this psychologically, medically, and financially effective program covered by third party payers. To the best of our knowledge, this program has never before been accomplished.

Education, Nursing↗
PubMedDate not supplied

Polyvinylpyrrolidone storage disease: a source of error in the diagnosis of signet ring cell gastric adenocarcinoma.

False-positive and false-negative diagnoses of cancer seldom occur during evaluation of gastric mucosal biopsy specimens obtained during flexible fiberoptic endoscopy of the stomach. When they do occur, false-negative diagnoses are usually the result of undersampling of the lesion, whereas false-positive diagnoses are the result of overinterpretation of benign histologic lesions. The diagnosis of diffuse signet ring cell adenocarcinoma is associated with both false-positive and false-negative diagnoses of cancer. The signet ring cell can be easily overlooked. Mucicarminophilic cells can be overinterpreted as diffuse signet ring cell adenocarcinoma. Polyvinylpyrrolidone is an unusual cause of this type of false-positive diagnosis of gastric adenocarcinoma. Judicious use of histochemical stains, immunohistochemistry, and electron microscopy plays a significant role in avoiding the false-positive diagnosis of diffuse signet ring cell adenocarcinoma.

Biopsy↗