IMPLEMENTATION OF THE DECISION TREE METHOD IN EXPERT ANALYSIS OF THE MEDICAL ERRORS IN OBSTETRIC PRACTICE.

OBJECTIVE: Aim: To identify expert patterns in cases of improper medical care in obstetric practice based on the analysis of the materials of judicial and investigative cases initiated against obstetrician-gynaecologists in cases of improper performance of their professional duties, using the decision tree method. PATIENTS AND METHODS: Materials and methods: A retrospective review of all alleged medical malpractice cases (a total 350) between 2007 and 2016 handled at Ternopil Regional Bu¬reau of Forensic Medical Examination, Chernivtsi Regional Bureau of Forensic Medical Examination and Zhytomir Regional Bureau of Forensic Medical Examination (Ukraine) was performed. RESULTS: Results: Expert commissions confirmed various shortcomings and omissions in provision of medical care in 232 (72.0%) of the investigated cases. Obstetricians were involved in claims in 82 (23.4%) cases. Application of intelligent data processing technology "Data Mining" with the use of the decision tree method revealed that inadequacies with regard to the medical records (attribute usage 100%) were the most informative attribute in the expert assessment of inappropriate medical care in obstetrics. Defects in the provision of obstetric care with a probability (P = 0.71) occur simultaneously both at pre-hospital and hospital levels and with a high probability (P = 0.83) result in severe consequences. CONCLUSION: Conclusions: The use of modern technologies for data analysis and processing contributes to the formulation of mathematically substantiated statements that significantly enhance the reliability of expert opinions in cases of forensic medical examination attached to dereliction of duties by the medical practitioners.

Peculiarities of morphological changes of endotheliocytes and remodeling of the arteries under the experimental hypercholesterolemia.

OBJECTIVE: Introduction: Under the conditions of experimental hypercholesterolemia, endothelial dysfunction develops with the morphological marker which is an increase in the number of blood-circulating desquamated endothelial cells (DEC), but this situation needs to be clarified in the development of this pathology in the age aspect. The aim: To find out the features of remodeling of endothelial cells and arteries of the hind limbs in the rats of pre-repopductive and reproductive age with experimental hypercholesterolemia. PATIENTS AND METHODS: Materials and methods: The experimental group consisted of 16 animals with biochemically confirmed hypercholesterolemia, which were divided into 2 groups: group 1 - 8 animals, aged 2-3 months, weighing 150-170 grams and group 2 - 8 rats aged from 11 to 11 months weighing 230-250 gram. The control group consisted of rats of the same age of 8 animals in each. RESULTS: Results: Hypercholesterolemia causes damage to the vascular endothelium of the arteries, which is characterized by an increase in the number of desquamated endothelial cells in the peripheral blood. The most circulating blood in desquamated endothelial cells was detected in 45 days of study in animals of reproductive age, where the number of desquamated endothelial cells increased by 2.56 times, and in animals of pre-reproductive age - 2.35 times. Morphological changes were characterized by thickening of the intima of the arteries of the femur, knee and tibia due to swelling of the endothelial cells, their desquamation and proliferative changes in places of preserved vascular endothelium. In response to the deposition of lipids and PAS-positive substrates, cellular reactions appeared as weak lymphocytic infiltration. In addition to hyperlastosis, fragmentation of elastic fibers was revealed. Correlation of intima contributed to the narrowing of vascular lumen. Lipids, xanthoma cells and sour mucopolysaccharides were accumulated in the inner membrane of the arteries. In addition to lymphocytic infiltrates, the amount of collagen fibers in adventitia increased. CONCLUSION: Conclusions: Under conditions of hypercholesterolemia the number of desquamated endothelial cells in the blood increases, and arterial remodeling is characterized by manifestations of hypertrophic-neoplastic remodeling in rats of pre-reproductive age, and in reproductive animals there were sclerotic and inflammatory changes.