Biomedical subjects

D Stojanović

Publications and source records attributed to D Stojanović.

At least 19 recordsLinked to original sources

PubMed2005

Cadmium in urine of children and adults from industrial areas.

Various human activities result in the release of significant quantity of cadmium to the environment. The study population included adults (230) and children (100) residing near the tobacco plant and a control group, unexposed to elevated cadmium concentrations, living in unpolluted area in the same city. Biomonitoring methods were used to assess the effects of contaminated air on the health of the public (urine samples). Ambient air samples were collected near the cadmium-related plant and in unpolluted area during the last ten years. Values of cadmium concentrations in urine found in polluted area were in range of 0.05-0.42 microg/g creatinine for children and 0.15-1.96 microg/g creatinine for adults. The results indicated statistical significant age-dependent differences in urine cadmium concentration between polluted and unpolluted area for adults. Boys and men had significantly higher urine cadmium levels than girls and women, but in children there were no significant gender-dependent differences in cadmium excretion found out. In conclusion, the results from the present study indicate that cadmium urine concentration in polluted area are very high, particularly in children.

Adolescent↗

PubMed2004

The level of nickel in smoker's blood and urine.

General population is exposed to nickel from various sources. Smoking presents a significant form of exposure. The research was conducted in period 2000--2003 in Institute of Public Health in Nis. The samples of tobacco and cigarettes (127 samples) were both domestic and imported, and samples of biological material (123 blood samples and 147 urine samples) were taken from occupationally unexposed persons (smokers and non-smokers). The analyses were performed by electrothermal atomization technique, by Perkin Elmer AAS M-1100. The results obtained, revealed a high content of nickel in cigarettes (2.32-4.20 mg/kg) and in tobacco (2.20-4.91 mg/kg) regardless of the kind and the origin of tobacco. Nickel content in the blood of smokers (0.01-0.42 microg/l, median 0.07 microg/l) was higher than in the blood of non-smokers (0.01-0.26 microg/l, median 0.06 microg/l) although this difference was not statistically significant (p>0.05). In the urine of smokers (<0.01-8.20 microg/l, median 1.20 microg/l) there was a significantly higher concentration of nickel than in the urine of non-smokers (<0.01-4.60 microg/l, median 0.50 microg/l), p<0.05. The exposure of smokers to nickel through tobacco smoke was high regardless of the kind and the origin of tobacco and cigarettes. The content of nickel in tissue fluids established by biomonitoring shows that smokers can be far more exposed to this carcinogenic substance than non-smokers and that health risks for smokers are higher in this context.

Case-Control Studies↗

PubMed2003

Cytokines in patients with lung cancer.

Lung cancer is one of the most common malignant diseases and is amongst the leading causes of death. Cell-mediated immune response and cytokines could play an important role in antitumour immunity. The aim of the study was to evaluate the cytokines', tumour necrosis factor-alpha (TNF-alpha), interleukin-1beta (IL-1beta) and IL-6, releasing capacity in patients with lung carcinoma and benign lung disease. A group of 41 patients were tested for the production of TNF-alpha, IL-1beta and IL-6 in bronchoalveolar lavage (BAL) and blood. The levels of cytokines in the lung cancer patients were: (1) in BAL - IL-6, 173 +/- 85 pg/ml; TNF-alpha, 170 +/- 116 pg/ml; and IL-1beta, 473 +/- 440 pg/ml; (2) in the blood - IL-6, 197 +/- 53 pg/ml; TNF-alpha, 311 +/- 202 pg/ml; and IL-1beta, 915 +/- 239 pg/ml. Alveolar macrophages of the patients with a lung cancer secreted significantly more cytokines, IL-6 (P = 0.0004) and IL-1beta (P = 0.0047), than alveolar macrophages of the patients with a nonmalignant lung cancer. However, significantly lower levels of cytokine production by the BAL cells were found in patients with small cell lung cancer. This production decreased further in phase IV of nonsmall cell lung cancer.

Adenocarcinoma↗

PubMed2002

[Combined use of internal mammary and right gastroepiploic arteries in myocardial revascularization with and without extracorporeal circulation].

Use of arterial grafts represent the new approach in coronary artery bypass grafting (CABG) surgery these days. This article represents our experience in use of two or more arterial grafts in combination (internal mammary artery--IMA and right gastroepiploic artery--RGEA). Between March 2000 February 2002, 10 patients underwent CABG with exclusive use of left or both IMAs and RGEA, with or without extracorporal circulation (ECC). In the group without ECC fast truck anesthesia was used. Post CABG catheterization was performed in three patients. There were no 30 day mortality or morbidity. Post CABG catheterization in two patients showed excellent graft patency. One patient continued to have chest pain and after the catheterization we found ostial narrowing of the celiac trunck which was successfully dilated. One of participants had abdominal hernia repair. Our opinion is that use of arterial grafts in CABG surgery has much lower risk, excellent patency and good long term prognosis.

Aged↗

PubMed1999

Roundness of epithelial nuclei in bronchial mucosa.

OBJECTIVE: To estimate the shape of epithelial nuclei in bronchial mucosa. STUDY DESIGN: Bronchoscopic mucosal samples from 12 patients with chronic bronchitis and 14 patients with squamous cell bronchial carcinoma were routinely processed and stained with the hematoxylin and eosin method. Fields with stratification and squamous metaplasia were selected. The roundness of epithelial nuclei was estimated using Lucia, version 3.51 ab, with an objective of 40:1 (NA = 0.65) and final magnification of 1,900:1. The images were manually edited. Roundness was calculated from area and perimeter. RESULTS: The mean roundness in stratification and squamous metaplasia in bronchial mucosa from carcinoma patients (0.90 +/- 0.04) was significantly greater than in bronchial mucosa from chronic bronchitis patients (0.80 +/- 0.006) (P < .05). CONCLUSION: Our results indicate that cell nuclei in stratification and squamous metaplasia in patients without bronchial cancer are more elongated than nuclei found under the same conditions in patients with squamous cell carcinoma.

Bronchi↗

PubMed1995

[Hemorrhagic stress lesions in the gastroduodenal mucosa. Incidence and therapy].

We have observed 428 patients with hemorrhages of the upper gastrointestinal tract; 7% of patients with stress lesions of the gastroduodenal mucosa being the cause of hemorrhages (4.9% were erosional stress hemorrhages and 2.1% were stress ulcera). Surgery is the most common cause of stress hemorrhages of the stomach and duodenum. They occur during the first 5 days after the surgery, whereas 70.59% (n = 12) occur during the first 72 hours. The localization of erosional hemorrhages of the stomach mucosa is mostly diffuse and that is why they are numerous (78.6% of the third degree) and hemorrhages are mostly heavy (the case with stress hemorrhages). Chronic peptic ulcera, especially duodenal (62.5% duodenal ulcera and 37.5% stomach ulcera) present an expressed risk factor for the occurrence of hemorrhagic erosions under the influence of the stress factor. The most common localization of the stress hemorrhagic ulcus is duodenum (66.7%) which is a potential danger for occurrence of the heaviest arterial hemorrhages. After major surgeries and during postoperative periods patients must be preventively protected by "antiulcus therapy" (especially patients with ulcera).

Acute Disease↗

PubMed1995

[Diagnosis of solitary thyroid gland nodules].

Solitary thyroid gland nodes have presented an entity in thyroid surgery and endocrinology for a long period of years mostly due to frequent occurrence of malignomas and other changes of thyroid gland as well as to insufficient and uncertain clinical diagnostics. The only certain diagnostics is still the intraoperative exploration and ex tempore biopsy of the change, which means that surgery presents both a diagnostic and therapeutic procedure. At the Clinical-Hospital Center "Dr Dragisa Milosevic" in Belgrade, Department of Surgery, 100 patients with preoperatively diagnosed solitary thyroid gland nodes underwent surgery during a 4 year period. In all patients a uniform clinical diagnostics was performed, and then, on the basis of intraoperative findings and ex tempore biopsy, gathered results were compared and reliability of certain preoperative diagnostic procedures was considered in regard to intraoperative findings. The aim of this study was to point to necessity of application of all relevant indexes in diagnostics with a special review on the intraoperative finding as the most relevant in making the decision about the range of surgery and further postoperative treatment.

Adult↗

PubMed1995

[Therapeutic modalities in upper gastrointestinal tract hemorrhage].

During the observed 5 year period 428 patients were hospitalized because of upper digestive tract hemorrhages. The commonest cause of hemorrhage was the peptic ulcer (46.5%). The bleeding duodenal ulcer occurs more often than the stomach ulcer (55.2% to 44.8%). These patients are usually of older age (more than 50% of men and 46% women in whom duodenal ulcer bleeding occurs are older than 60 years of age). In about half of ulcers (40%) acute bleeding occurs during the urgent endoscopic procedure. Oozing type of bleeding occurs most frequently (82.5%), while the most serious type of bleeding, aortic pulse, is much less frequent (7%). Fibrinous coagulum recidives in bleeding in about one fifth of cases. Active pulse bleeding is the cause of surgery in 66.7% as well as two thirds (75%) of recidivant bleedings. More than 80% of patients in whom gastroduodenal bleeding occurs are being conservatively treated and this percentage may be taken as an adequate choice of the therapy modality.

Adolescent↗

PubMed1982

Cysticercosis cerebri involving the lateral ventricle.

Cysticercosis cerebri involving the lateral ventricle is very rare. Two cases with such localization are presented. One of the patients, with occlusion of the foramen of Monro, was successfully treated by operation. A larval form in the lateral ventricle was revealed incidentally at autopsy in the second patient after rupture of a large basilar artery aneurysm.

Adult↗

PubMed1976