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Biomedical subjects

F Stratton

Publications and source records attributed to F Stratton.

At least 37 records · Page 2Linked to original sources
PubMed1974

Asymptomatic liver disease in hepatitis B antigen carriers.

Thirty-four healthy blood donors, found to be persistent HBAg carriers, have been investigated by means of serial liver function tests, bromsulphthalein (BSP) retention, and liver biopsy. Thirty-one of the donors had histological abnormalities including one with cirrhosis, three with chronic aggressive hepatitis, and 11 with chronic persistent hepatitis. In 13 biopsies there were focal areas of necrosis in the liver parenchyma. Serial liver function tests revealed abnormalities in each of the donors with cirrhosis or with chronic aggressive hepatitis, in seven of the 11 donors with chronic persistent hepatitis, and in seven of the 13 with focal parenchymal necrosis. The degree of BSP retention was greatest (>11%) in the donors with chronic aggressive hepatitis. The severity of the histological changes was related neither to the titre of the antigen in the serum nor to the presence of autoantibodies.

Alanine Transaminase↗
PubMed1974

The effect of ambient temperature on the anti-D assay using the Auto-Analyzer.

Using the AutoAnalyzer, the percentage agglutination effected by the anti-D antisera studied showed a varied dependence on the ambient temperature over the manifold subsequent to the incubation period at 37 degrees C. This leads to assays which are a function of the ambient temperature. It is suggested that the entry of a relatively large volume of rouleaux-dispersing agent results in an elution of bound antibody to a new position of equilibrium, the shift being dependent on the particular equilibrium constant of the antibody and the rate of its attainment on the ambient temperature. A constant ambient temperature will lead to greater accuracy of anti-D assay.

Autoanalysis↗
PubMed1974

Preparation of test cells for the antiglobulin test.

Erythrocytes may be coated with blood group antibodies with or without reacting complement or sometimes apparently with complement alone. This may occur in vivo in such conditions as autoimmune acquired haemolytic anaemia, haemolytic disease of the newborn, or after transfusions of incompatible blood. It may occur in vitro also by the deliberate sensitization of erythrocytes during laboratory serological investigations. Blood group antibodies may be of immunoglobulin types gammaM, gammaA, or gammaG; we have never seen gammaD antibodies. The presence of these antibodies on the erythrocyte surface, together with complement components or the presence of complement components alone, may be detected by the direct antiglobulin test where sensitization occurs in vivo or by the indirect antiglobulin test where there is sensitization in vitro.

Adsorption↗
PubMed1972

Manipulative and inherent errors in anti-D quantitation using the AutoAnalyzer.

The limits of accuracy for the quantitation of anti-D using the AutoAnalyzer have been reduced from +/- 26% with manually prepared dilutions to +/- 14% using an automatic pipette, as expressed by the 95% confidence limits. The error inherent in the AutoAnalyzer was estimated to contribute +/- 10% to the overall error. Problems associated with the reproducibility of this method for anti-D quantitation have been investigated, namely, the effect of the age of a given test cell, the use of different test cells, loss of sensitivity of the machine over a given day, and the reproducibility of results obtained at different positions on the standard graph.

Analysis of Variance↗
PubMed1972

The adverse effect of bromelin in anti-D quantitation using the AutoAnalyzer.

With eight of 32 sera significantly higher estimations of anti-D concentration were obtained when test cells premodified with bromelin were used instead of bromelin as a reagent added to the reaction manifold. With one serum the difference in estimation, using the two techniques, revealed a ten-fold discrepancy. The consequences of these findings are discussed in relation to the use of the AutoAnalyzer for the quantitation of anti-D.

Autoanalysis↗
PubMed1970

Primary immunization of Rh-negative volunteers.

To determine the best method for the production of high-titre anti-D serum primary immunization was carried out in two groups of Rh-negative male volunteers with washed group O R(2)R(2) cells. The first group of six men were given 5 ml. of packed cells, and the second group of five men were given 0.5 ml. of packed cells, in each instance by intravenous injection. Only one individual in each group failed to develop anti-D following the primary inoculation, and it has been concluded that 0.5 ml. of packed R(2)R(2) cells is probably a satisfactory dose for this purpose.There was a delay of several weeks before anti-D could be shown to have developed. The initial antibodies which appeared in the serum comprised 7S gammaG immunoglobulins, with, in about half the cases, a minor 19S gammaM component.

Antibody Formation↗
PubMed1969

Haemolytic disease of the newborn caused by anti-Lan antibody.

The first recorded example of anti-Lan associated with haemolytic disease of the newborn is reported. This emphasizes the importance of screening for atypical antibodies early in pregnancy, even though prophylactic use of anti-D immunoglobulin will eventually reduce the incidence of haemolytic disease due to anti-D antibody.

Adult↗