1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced lipid peroxidation and DNA damage in mouse bone marrow and blood

1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is a neurotoxin that induces Parkinsonism in humans, monkeys, and mice and oxidative stress in mammalian cells and tissues. In the present study, the relationship between the generation of lipid peroxidation products and DNA damage was studied in mice treated with MPTP. The frequency of micronucleated polychromatic erythrocytes (MN-PCE) and the concentrations of malonaldehyde and 4-hydroxyalkenals were determined in the bone marrow and peripheral blood of mice 0, 24, 48, 72, and 96 hr after treatment with MPTP, cyclophosphamide as a positive control, or diluent. Both MN-PCE and the lipid peroxidation products increased in MPTP-treated mice, with significant levels being detected in bone marrow starting at 24 hr after treatment and in blood starting at 48 hr after treatment. These results suggest that the generation of oxidative products is related to the DNA damage produced by MPTP in mice.     

Phlegmonous enterocolitis

Eight cases of phlegmonous enterocolitis which involved the small intestine exclusively in 5 patients, colon exclusively in 2, and both small intestine and colon in one are reported. Seven of the cases were studied at autopsy. The intestinal lesion was clearly the cause of death in 3 patients and was probably a secondary finding in 4 others. In one case, the cecum was involved and this segment was surgically resected. Five of the patients gave a history of alcoholism. The livers of the 7 patients studied at autopsy were all abnormal; cirrhosis was present in 4, severe fatty metamorphosis in 2, and moderate fatty metamorphosis in 1. The clinical, morphological, and bacteriological aspects of phlegmonous gastritis and phlegmonous enterocolitis are similar, and these two conditions are thought to represent the same infectious disease involving different levels of the gastrointestinal tract. In most patients the factor(s) predisposing to infection of the gastric and intestinal wall are unknown. In some patients mucosal injury of varied type and septicemia appear to have been the forerunners of the phlegmonous lesion. The possible relationships of ischemic bowel injury, alcoholis, and liver disease to phlegmonous inflammation of the gastrointestinal tract are discussed.     

Improving blood transfusion practice: role of a computerized hospital information system

The recent focus on medical risk and financial cost has prompted a need for better guidelines for prescribing the transfusion of blood components. In 1987, to respond to the issues of quality transfusion practice and accurate evaluation, LDS Hospital (Salt Lake City, UT) began using a computerized, knowledge-based blood-ordering system. Each transfusion request was reviewed and flagged by the computer when it did not meet the criteria established by the medical staff. The study reviewed the use of red cells, platelets, and fresh-frozen plasma in 13,082 transfusion orders for 5847 consecutive patients from July 1, 1988, through June 30, 1989. The evaluation assessed, first, the adherence of physicians to computerized criteria and, second, their adherence to the quality of transfusion practice. A high percentage of the blood units ordered met the established criteria: 91.2 percent for the red cell transfusions, 72.9 percent for platelets, and 81.7 percent for fresh-frozen plasma. From the July 1, 1987, implementation date through June 1989, the mean hematocrit of persons being transfused dropped from 28.6 to 27.7 percent (0.29 = 0.28) (p less than 0.005) and the number of orders requiring review by the quality assurance department dropped from 100 to 14 percent; moreover, there was a true-exception rate of only 0.37 percent. The use of the computer system effected the implementation of the following measures: 1) identification of the indications and establishment of clear clinical and biologic parameters for every transfusion, and 2) measurement and improvement of institutional transfusion practice. These results demonstrated the efficacy of a computerized hospital information system in implementing continuous quality improvement for transfusion practice.(ABSTRACT TRUNCATED AT 250 WORDS)     

The dignity in advanced dementia (diadem) study: Developing an integrated geriatric palliative homecare program

Background: The prevalence of dementia is rising globally. Many patients suffer from the burdensome complications of advanced dementia as they are still poorly addressed. Aims: To describe the development of an interdisciplinary palliative homecare program for patients with advanced dementia and to develop a workflow that delineates the seamless continuation of care between the hospital and community with the homecare program. Design: Palliative care needs of patients and caregivers were established through a qualitative review of the literature. Appraisal tools were chosen based on their validity and feasibility in the homecare setting. Gaps in the healthcare system were identified and addressed as part of the integration of care between the hospital and the community. Setting/participants: Patients at Functional Assessment Staging (FAST) 7 with pneumonia, albumin level <35?g/L and/or enteral feeding were enrolled from a tertiary care hospital into the homecare program. Results: Patients’ symptom burden and quality of life were assessed. Caregivers were engaged in the planning of patients’ care. With the homecare program, patients and caregivers received support at home. Two physicians, seven nurses, and three social work professionals were educated about advanced dementia palliative care and medical information was communicated between different healthcare sites. Preliminary analysis of 306 patients revealed the presence of pain and neuropsychiatric behaviors. Impact of caregiving was mild to moderately severe. Conclusion: Advanced dementia is under-recognized as a terminal illness requiring specialized palliative intervention. Integrating a homecare palliative program into advanced dementia care is the first step towards palliating suffering at the end-of-life.