Browsing by Author "Vukčević, Miodrag (6602095465)"

The data that episodes and sequels of venous thromboembolism (VTE) are recorded in a significant percentage of patients receiving standard anticoagulants as VTE prophylaxis (unfractionated, low-molecular-weight heparin and vitamin K inhibitors) as well as the fact that these drugs have significant limitations and that they may cause serious side-effects in some patients indicate the need for the introduction of new anticoagulant drugs. Fondaparinux, a selective inhibitor of Factor Xa, administered following major orthopedic surgeries having a high risk for the development of VTE, is more efficient than enoxaparin sodium used in European and North-American approved doses. The increased incidence of major bleeding (excluding fatal) due to fondaparinux could be perhaps lowered by dosage reduction in patients with a mildly decreased creatinine clearance. Dabigatran, a peroral direct thrombin inhibitor, administered for VTE prophylaxis in elective hip and knee surgery, showed in to date studies the efficacy comparable (if dabigatran is given in both dosage regimes of 150 mg and 220 mg daily) or superior (if dabigatran is given at a dose of 220 mg daily) to enoxaparin administered in European-approved doses, while North American-approved doses of enoxaparin were superior than dabigatran in VTE reduction. No significant differences in bleeding rates were determined in any of the study groups. We consider that the introduction of new anticoagulants, including fondaparinux and dabigatran, will contribute to the establishment of a better safety profile and efficacy, and will also enable adequate therapy individualization for each patient depending on his/hers clinical characteristics. The introduction of novel peroral anticoagulants will, inter alia, significantly contribute to improvement in the quality of life, release the patient from numerous limitations in nutrition, interreaction, frequent laboratory monitoring, and also significantly improve therapeutic predictability. © 2015, Serbia Medical Society. All rights reserved.

Background: Disrupted sleep affects cardio-metabolic and reproductive health. Obstructive sleep apnea syndrome represents a major complication of obesity and has been associated with gonadal axis activity changes and lower serum testosterone concentration in men. However, there is no consistent opinion on the effect of obstructive sleep apnea on testosterone levels in men. Objective: The aim of this study was to determine the influence of obstructive sleep apnea on total and free testosterone levels in severely obese men. Materials and methods: The study included 104 severely obese (Body Mass Index (BMI) ≥ 35 kg/m2) men, aged 20 to 60, who underwent anthropometric, blood pressure, fasting plasma glucose, lipid profile, and sex hormone measurements. All participants were subjected to polysomnography. According to apnea-hypopnea index (AHI) patients were divided into 3 groups: <15 (n = 20), 15 - 29.9 (n = 17) and ≥ 30 (n = 67). Results: There was a significant difference between AHI groups in age (29.1 ± 7.2, 43.2 ± 13.2, 45.2 ± 10.2 years; p < 0.001), BMI (42.8 ± 5.9, 43.2 ± 5.9, 47.1 ± 7.8 kg/m2; p = 0.023), the prevalence of metabolic syndrome (MetS) (55%, 82.4%, 83.6%, p = 0.017), continuous metabolic syndrome score (siMS) (4.01 ± 1.21, 3.42 ± 0.80, 3.94 ± 1.81, 4.20 ± 1.07; p = 0.038), total testosterone (TT) (16.6 ± 6.1, 15.2 ± 5.3, 11.3 ± 4.44 nmol/l; p < 0.001) and free testosterone (FT) levels (440.4 ± 160.8, 389.6 ± 162.5, 294.5 ± 107.0 pmol/l; p < 0.001). TT level was in a significant negative correlation with AHI, oxygen desaturation index (ODI), BMI, MetS and siMS. Also, FT was in a significant negative correlation with AHI, ODI, BMI, age, MetS and siMS. The multiple regression analysis revealed that both AHI and ODI were in significant correlation with TT and FT after adjustment for age, BMI, siMS score and MetS components. Conclusion: Obstructive sleep apnea is associated with low TT and FT levels in severely obese men. © Copyright © 2021 Tančić-Gajić, Vukčević, Ivović, Marina, Arizanović, Soldatović, Stojanović, Đogo, Kendereški and Vujović.

Numerous limitations and side effects of standard anticoagulants require administering new anticoagulant drugs. New peroral anticoagulants of Factor Xa inhibitor group have more advantages, the key ones being: Substantial reductions in specific nutrition limitations and drug interaction, no need for routine laboratory monitoring and greatly improved therapy predictability. Rivaroxaban, a selective peroral Factor Xa inhibitor is more effective compared with enoxaparin for venous thromboembolism (VTE) prophylaxis in major orthopedic interventions. Though several single trials demonstrated no difference in hemorrhagic complications, certain meta-analyses with rivaroxaban showed a higher incidence of hemorrhage. Apixaban, a peroral reversible inhibitor of factor Xa approved for the prevention of VTE, compared with European-approved doses of enoxaparin has the efficacy almost equal to the North-American-approved enoxaparin doses without a significant difference in bleeding rates, though АDVANCE I study points towards lower bleeding rates in patients treated with apixaban. To clarify the contradictory results of the recent meta-analysis related to the comparison between the stated factor X inhibitors and various comparator enoxaparin regimens as well as related to the risk for symptomatic PTE and total bleeding events following major orthopedic surgery, new research will be required. Specificities of rivaroxaban and apixaban, already constituting, according to modern recommendations, an integral part of the VTE prophylaxis protocols after major orthopedic interventions, will enable the establishment of personalized protocols aimed at developing an improved safety profile of each individual patient. © 2020, Serbia Medical Society. All rights reserved.

Background/Aim. The aim of this prospective nonrandomized study was to test functional results of different surgical strategies in the operative treatment of symptomatic patellofemoral malalignment. Our hypothesis was that immediate extensive surgery does not have serious advantage comparing to “step by step” procedure, regarding the main symptoms and functional end result. We wanted to check whether obtaining ideal surgical patellofemoral congruency is an essential prerequisite for subsidence of the major symptoms of patellofemoral malalignment. Methods. The study included 35 patients with patellofemoral malalignment who had persistant major symptoms: patellar pain and slipping, 3 months after nonoperative treatment. Divided into three groups, they all underwent the realignment surgery, but in different extent and sequence: immediate extensive surgery, step by step surgery, and only proximal realignment. Their overall functional scores as well as major symptoms were assessed at the beginning, after the surgery, and during the 3-years follow-up period and then, compared at the end. Results. There was no significant difference in the functional results among the groups, neither at the beginning (p = 0.1318) nor at the end of the study (p = 0.3996), but the results at the beginning compared to those at the end of the study showed a statistically significant difference in all three groups (p1 = 0.005062; p2 = 0.011719; p3 = 0.000352). The same result was in regard to the major symptoms. Conclusion. The study confirmed that insisting on immediate extensive surgery in order to achieve precise and complete congruency of the patellofemoral joint, did not prove its advantage over the less invasive, individual surgical approach concerning functional scores and major symptoms. © 2018, Inst. Sci. inf., Univ. Defence in Belgrade. All rights reserved.