Biomedical subjects

R Kradin

Publications and source records attributed to R Kradin.

22 records · Page 2Linked to original sources

PubMed1977

The relationship between Parkinson syndrome and vascular siderosis: an electron microprobe study.

Vascular siderosis (VS) refers to the presence of mineralized small and medium-sized arteries in the globus pallidus, usually regarded as reflecting an aging process. The electron probe analysis of deposits in vascular siderosis in 10 patients dying of parkinsonism and in 8 other patients without parkinsonism is reported here. The microprobes identified a total of 11 elements in the VS in these 18 patients. Five elements--lead, aluminum, sulfur, manganese, and barium--were present only in VS associated with parkinsonism. Statistically, the association of lead was highly significant while that of aluminum and sulfur in 4. The significance of the presence of sulfur is difficult to assess since its compounds are normally present in large quantities in the brain. These findings raise the question whether lead and aluminum may be associated in some way with the pathogenesis of certain forms of Parkinson disease.

Aged↗

PubMed1975

Inclusions in the sural nerve in metachromatic leukodystrophy.

A 2 year old girl develops a fever, anorexia and a cough which last three weeks. Following this event, she presented with intention tremor and increasing difficulty with crawling. At the age of 3, a nerve biopsy was done which made the diagnosis of metachromatic leukodystrophy. EM examination of the nerve biopsy revealed large quantitites of abnormal structures in the cytoplasm of Schwann and phagocytic cells. Virus like spheroid bodies were present in a few axons and cytoplasm of Schwann cells.

Child, Preschool↗

PubMedDate not supplied

Phenotype of blood lymphocytes in PTSD suggests chronic immune activation.

Patients with posttraumatic stress disorder (PTSD) have a past history of extremely stressful experience and often present with somatic complaints. Peripheral blood lymphocytes (PBL) of patients with PTSD associated with a history of childhood sexual abuse were examined for changes in immune phenotype. The ratio of CD45RO-positive to CD45RA-positive lymphocytes (CD45RO/CD45RA), an index of lymphocyte activation, was higher (P = 0.04) in the PTSD subjects than in the normal subjects. No differences were observed for the number of PBL or the representation of major T, B, or NK lymphocyte subsets. These findings suggest the presence of increased lymphocyte activation in the PBL of patients with PTSD.

Adult↗

PubMedDate not supplied

Venovenous bypass with a membrane lung to support bilateral lung lavage.

Partial venovenous cardiopulmonary bypass with a membrane oxygenator was used to exchange respiratory gases during and after bilateral lung lavage in a patient with severe hypoxemia caused by pulmonary alveolar proteinosis. The patient was unable to tolerate an attempt at lung lavage without bypass. Therefore, extracorporeal perfusion safely supported the patient's respiration for 32 hours, buying time to lavage each lung separately and to enable sufficient recovery of transpulmonary gas exchanging capacity.

Cardiopulmonary Bypass↗