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Biomedical subjects

E Pittermann

Publications and source records attributed to E Pittermann.

At least 37 records · Page 2Linked to original sources
PubMed1985

[Plasma exchange therapy in hematology].

Plasma exchange (PE) is the treatment of choice in emergencies arising in patients suffering from the hyperviscosity syndrome, factor VIII antibody haemophilia, autoimmune haemolytic anaemia or post-transfusion purpura. Apart from these clear indications, the efficacy of PE in other hematological disorders such as thrombotic thrombocytopenic purpura, immune thrombocytopenia, cryoglobulinaemia, rhesus incompatibility, autoimmune cytopenia and AB0 incompatibility with bone-marrow transplantation is less well defined. In such disorders PE can be performed when conventional treatment has failed.

Anemia, Hemolytic, Autoimmune↗
PubMed1982

[Current status of thrombocyte and granulocyte substitution].

The present situation in thrombocyte and granulocyte substitution is presented. First, the different methods of producing thrombocyte and granulocyte concentrates are discussed. Differential centrifugation and cell separators with continuous or intermittent flow are used for gaining thrombocytes, whereas cell separators with continuous or intermittent flow as well as filtration and gravitation leucapheresis may be used for producing granulocyte concentrates. Then, the indications for substituting granulocytes and thrombocytes are discussed. For thrombocyte substitution, thrombocyte numbers below 20 X 10(9)/1 and haemorrhagic diathesis are considered as an absolute indication. Granulocyte concentrates should only be administered to patients with transitory marked granulocytopenia, with granulocytes being less than 0.2 X 10(9)/1 and ensured bacterial infection. Finally, future basic developments of thrombocyte and granulocyte substitution are discussed.

Blood Transfusion↗
PubMed1981

[An unusual case of repeated self mutilation (author's transl)].

An unusual case is presented of repeated, life-threatening self mutilation, elicited by the topical application of sodium hydroxide, which necessitated several operations, including amputation of the left lower leg. Histological examination revealed colliquation necrosis and a striking eosinophilia. The latter feature, which was not reproducible in an animal experiment, may be related to a defect of leucocyte locomotion in the present case.

Adolescent↗
PubMed1980

[Replacement therapy with blood components in bone-marrow depression due to cytostatic drugs (author's transl)].

Intensive cytostatic treatment is associated with severe depression of bone-marrow function, which requires treatment with specific replacement of blood components. Erythrocyte concentrates should be given "pure", without leucocytes and platelets, to prevent rapid alloimmunisation. Different separation techniques (intermittent flow and continuous flow centrifugation, double-bag platelet pheresis) provide platelet concentrates containing 2.0 to 10.0 X 10(11) platelets from a single donor. Immunization against HLA and specific antigens can be minimised by careful donor selection. Effective granulocyte support in granulocytic patients requires large doses of granulocytes given daily to compensate the deficit.

Adolescent↗
PubMed1980

[Granulocyte and thrombocyte substitution].

The high rate of production makes it necessary to provide large amounts of platelets or granulocytes to support patients with bone marrow failure. With cell separators up to 10 X 10(11) platelets and more than 2 X 10(10) granulocytes can be withdrawn from a single donor. Therefore the selection of HLA-compatible donor-recipient pairs is possible. Platelets should be given in patients with hämorrhage and low platelet values due to decreased production. The substitution with granulocytes should be restricted to patients suffering from severe granulocytopenia (less than 500 granulocytes/microliter) and life threatening infection and when bone marrow recovery can be assumed.

ABO Blood-Group System↗
PubMed1977

[Manufacture and transfusion of leukocyte and thrombocyte concentrates with special reference to hematological problems].

Great quantities of granulocytes or platelets can be removed from a single donor by following methods: 1) Continuous flow cellseparation 2) Intermittent flow cellseparation 3) Filtration leukapheresis. Using one of the methods mentioned above 1.0 X 10(10)--5.0 X 10(10) granulocytes can be obtained during a four hours procedure. The yield of platelets is more than 5.0 X 10(11) cells. The procedure itself is well tolerated and no severe side effects were seen.

Blood Group Antigens↗
PubMed1976

[New polymerase gene in pancytopenia (author's transl)].

Increasing evidence has accumulated that the direct assay of reverse transcriptase in human blood cells is of value in the diagnosis of leukaemia. The isolation and characterization of this enzyme has shown that it possesses remarkable similarities to the DNA-polymerase of the RNA-tumour virus of simian sarcoma. Hence, leukaemic cells in humans are thought to possess a virus-related gene, namely, reverse transcriptase. Various clinical reports have established the presence of this enzyme in blood cells, not only in the case of morphologically-proven malignant change, but also in cases classified as non-leukaemic from the morphological picture, such as acute leukaemia in remission and in the pre-leukaemic state. In confirmation and augmentation of earlier views we now report on the presence of reverse transcriptase in a patient with pancytopenia, who subsequently developed acute leukaemia i.e. isolation of the enzyme occurred in the pre-leukaemic state.

Clinical Enzyme Tests↗
PubMed1975

[The use of the cell separator in the treatment of leukemia].

In order to provide leukemic patients during the critical granulocytopenic stage with a sufficient amount of granulocytes a blood cell separator with a continuous extracorporeal circulation was developed. This permits to obtain up to 3.0-10(10) leukocytes during a 4---5 hours period from a single donor. According to our own experiences with 20 leukophereses performed in 13 healthy donors by the use of the AMINCO cell separator an average of 1.17-10(10) leukocytes with a granulocytic portion of 61% was collected per run. In two cases of agranulocytosis and septic fever (one case of pseudomonas septicaemia) the repeated administration of leukocyte concentrates, while specific antibiotic therapy was continued, led to a marked improvement over a longer period of time. Furthermore thrombocyte concentrates up to 7.0-10(10) platelets can be obtained by the cell separator. Applied as depletory method in the treatment of CML and CLL leukopheresis may rapidly diminish the peripheral leucocyte count while spleen and lymphomas decrease in size at the same time. A 20% reduction in cell count may be achieved by a serie of 3---4 leukophereses. Also the use of the cell separator in the treatment of makroglobulinemia by plasmapheresis is discussed.

Adolescent↗