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Biomedical subjects

B Schellmann

Publications and source records attributed to B Schellmann.

41 records · Page 3Linked to original sources
PubMed1975

[Determination of fluoride in bone samples from human iliac crest with an ion-specific electrode (author's transl)].

A simple potentiometric method for the determination of fluoirde ion in human bones is described. The bone samples were taken from a definite position in the iliac crest. The samples are prepared for analysis by ashing at 550 degrees C, dissolving in HNO3 (4 mol/1) and adjusting the pH with NaOH (4 mol/1) and Total Ion Strength Adjustment Buffer, Absolute values are derived from a calibration curve based on aqueous NaF-buffer solutions. The calibration curve is linear in the range 5.2-10(-3)-1.0-10(-5) mol/1F-. The minimum limit of measurement is 5.2 X 10(-6) mol/1F-. The method has an accuracy of 96.1 % or 92.3% with a series precision based on the Pearson variability coefficient of 1.68%. The normal mass fraction of fluoride in human bones was found to be between 69 and 1740 - 10(-6) F-/ash.

Bone and Bones↗
PubMedDate not supplied

The syndrome of absent pulmonary valve and ventricular septal defect--anatomical features and embryological implications.

Four cases of absent pulmonary valve in combination with ventricular septal defect are reported. In this syndrome hypo- and dysplasia of the pulmonary valve is constantly associated with a big ventricular septal defect, formation of a huge pulmonary artery aneurysm and absence of the ductus arteriosus. Presence or absence of a right ventricular outflow tract obstruction is the criteria for classification into two forms. Absence of the pulmonary valve, right ventricular outflow tract obstruction and a malalignment-type ventricular septal defect produced by a conotruncal malseptation process represent the primary complex of malformations. Consecutive intrauterine cardiac failure is most probably prevented by prenatal closure of the ductus arteriosus. Pulmonary artery aneurysm and also dilatation of the right ventricular outflow tract as well as a whole lot of other coexisting deformities can be explained by a cascade of hemodynamical sequelae started by this ductus closure in utero. An embryological scheme explaining the genesis of this syndrome is derived from a morphological analysis of the constituting incoherent-appearing anatomical features.

Angiocardiography↗
PubMedDate not supplied

[A new examination program for forensic assessment: performance of computers in medicine].

Computerizing of medicine is expected to increase very rapidly in the next few years. This will bear new questions for forensic judgement. We report a case and our expert opinion concerning the use of a very simple computer program at a private hospital to obtain comments on laboratory findings. Furthermore we discuss questions we consider to be of importance for forensic judgement in this field.

Clinical Laboratory Information Systems↗