Biomedical subjects
Publications and source records attributed to Ts Tsvetkov.
The aim of the present review is to study the significance of the COX-2 expression for unfavourable prognosis and aggressive clinicopathological parameters in certain malignancies. The main directions for future research on COX-2 as a prognostic factor of decreased survival and predictive factor of chemotherapy resistance in ovarian cancer are discussed.
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The authors reported the results from a retrospective investigation of 10121 deliveries for a three-year period (1981-1983) as well as from a prospective study of 6239 child-births during a three-year period after a 20-year-long time lag, i.e., in 2000-2002. The cases with early post-partum hemorrhages (EPH) and with accomplished laparotomy were examined. The causes for EPH, the obstetric therapeutic measures and manipulations prior to the laparotomy as well as the surgical interventions after opening the abdomen were considered. The authors emphasized that 20 years ago three uteri only could be "saved" by means of ligation of the uterine vessels. A hysterectomy was carried out in 21 cases with massive EPH after the laparotomy. After two decades the situation changed dramatically. The hysterectomies amounted to only 22.22% of the cases (n = 4) while in the rest females (n = 14) the copying of the massive hemorrhages was performed by means either of stepwise ligation of the uterine vessels, or of ligation of the hypogastric ones in 3 cases with additional vaginal lacerations. It was outlined that mother's mortality rate was zero during these two periods. The conclusion has been drawn that the ligation of the uterine vessels represents an alternative to the hysterectomy when copying the EPH and preserves the child-bearing functions of some females because of the subsequent vascular recanalization.
The authors examined 273 newborns weighing less than 1500 g. Their birth weight was very low (1001-1500 g) in 179 but extremely low (< 1000 g) in 94 newborns. Neurological damage was proved in 101 cases (36.99%). The probable reasons for intra- (peri-) ventricular and cerebral hemorrhages in these newborns were the following: respiratory distress syndrome (in 11 cases or 10.89%), mother-fetal infection (in 16 cases or 15.84%), and combination of asphyxia and infection (in 10 cases or 9.9%). The severe degree of prematurity (and immaturity) remained the only causative factor in the rest 64 premature newborns (63.37% of the cases). The results from the distribution of the neurological lesions according to the gestational age were also considered. Usage of monofactorial regression models detected statistically significant differences between asphyxia, infection and brain damage in the newborns of different gestational age.
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The authors analyzed the microbiological findings in 39 female patients with tubo-ovarian abscesses and intrauterine devices (IUD). An anaerobic microflora was isolated in 66.67% of the aspirates after puncture of cavum Douglasi (CD) as well as in 41.67% of the abdominal exudates or abscesses during laparotomy. Eikenella corrodens was isolated from CD in three patients while in two of them the same bacterium was intraoperatively isolated from the abdominal exudate, too. All the three patients had IUD and regular sexual intercourses, orogenital inclusive, with a lot of partners. Eikenella corrodens is an opportunistic pathogenic agent. It causes infection in case of disturbed local and general immunity under the conditions of traumatic mucosal lesions. It is resistant to numerous antibiotics.
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Magnesium sulphate (MgSO4) is with a proved effectiveness in cases of praeclampsia/eclampsia, but its use as a tocolytic is discussed in the last few years. That is why we had for an object to study its effect as a tocolytic in cases of abortions and premature labours. The study is prospective and if is made in I-st obstetric clinic of High Medical School--Pleven. Treatment with Cormagnesin was carried out to pregnant women for suppressing the uterine activity. Cormagnesin 200 (1 amp-10 ml) contains 1000 mg MgSO4, and Cormagnesin 400 (1 amp-10 ml) contains 2000 mg MgSO4. The medicine was administered in dosage of 4 or 5 g for 30 min, and after that if there were any uterine contractions the infusion was carried on with additional 5 g MgSO4 for 6 to 12 h. The total dosage was from 4 to 60 g MgSO4. The authors reported on very good effect in cases with pains and increased uterine tone--18 (36.73%), as well as in cases with pains and irregular uterine contractions 5 (10.21%), while the treatment was without any effect in cases with uterine contractions on 15-20 min, increased uterine tone, bleeding and Pelvic score 1-3 points in spite of high dosages of MgSO4 and longer duration of treatment. The authors made the conclusion, that the subjective complaints should not be accepted as an indication for administration of MgSO4, and MgSO4 should be administered in cases with increased uterine tone and irregular uterine contractions. Every genital bleeding and suspicion for placental abruption should be defined more precisely, because lately diagnosed placental abruption and unjustified expectation for suppression of uterine activity by MgSO4, may lead to increase of perinatal morbidity and mortality. In spite of the controversial data about MgSO4 as a tocolytic, its administration is justified and necessary.
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Explore the source record for details and available documents.
Explore the source record for details and available documents.