Petar Bulat

Dr. Petar Bulat

Clinic of urology, University Clinical Centre of Serbia, Belgrade, Beograd, Serbia
orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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16 February 2024 in Life
Verified
Journal Article
Open access
PDF file
Uros BumbasirevicUros Bumbasirevic
Uros Bumbasirevic
MPMiloš Milivoje Petrović
Miloš Milivoje Petrović
Milica ZekovicMilica Zekovic
Milica Zekovic
VCVesna Coric
Vesna Coric
BMBogomir Milojevic
Bogomir Milojevic
AJAleksandar Janicic
Aleksandar Janicic
There are limited data regarding the significance of multifocality in testicular cancer patients. This study evaluated the relationship between multifocality and clinicopathological features determined at the time of radical orchiectomy. The study involved 280 consecutive patients who underwent radical orchiectomy between 2018 and 2023. Multifocality was defined as a distinct tumor focus characterized by a group of malignant cells > 1 mm, clearly differentiated from the primary tumor mass. Uni- and multivariate logistic regression analyses were employed to investigate the association between multifocality and histopathological parameters along with potential risk factors for clinical stages II + III. Multifocality was identified in 44 (15.7%) patients. Significantly smaller primary tumors were observed in subjects with multifocality (20.0 mm vs. 30.0 mm, p = 0.0001), while those exhibiting monofocality presented a markedly elevated rate of tumors exceeding 4 cm (40.3% vs. 18.2%, p = 0.005). Furthermore, multifocality was associated with a significantly higher rate of primary tumors < 2 cm (52.3% vs. 29.2%, p = 0.003). Univariate logistic regression analysis revealed a substantial decrease in the likelihood of multifocality occurrence in seminoma patients with tumors > 4 cm (OR = 0.38, p = 0.017). Meanwhile, in multivariate logistic regression, multifocality did not emerge as a significant risk factor for clinical stages II + III in either seminoma (p = 0.381) or non-seminoma (p = 0.672) cases. Our study suggests that multifocality holds no substantial prognostic relevance for clinically advanced disease in testicular cancer patients. The findings indicate that multifocality is associated with smaller primary tumors, particularly those measuring less than 2 cm.

6 November 2024 in Medicina
Verified
Journal Article
Open access
PDF file
BKBoris Kajmakovic
Boris Kajmakovic
MPMiloš Milivoje Petrović
Miloš Milivoje Petrović
PBPetar Bulat
Petar Bulat
Uros BumbasirevicUros Bumbasirevic
Uros Bumbasirevic
BMBogomir Milojevic
Bogomir Milojevic
ZDZoran M. Dzamic
Zoran M. Dzamic
Background and Objectives: Radical prostatectomy (RP) stands as the predominant instigator of postoperative stress urinary incontinence. Techniques such as the preservation of the neurovascular bundles, bladder neck preservation, and ensuring longer postoperative urethral length have shown positive impacts on continence. The posterior reconstruction is another method that aids in early continence recovery. Anterior suspension as simulator of puboprostatic ligaments is another factor. Materials and Methods: This study was conducted in the Clinic of Urology, University Clinical Center of Serbia, between December 2014 and January 2020, employing a prospective, non-randomized comparative design. Data were meticulously gathered from 192 consecutive patients. The process of regaining continence was monitored at intervals of 1, 3, 6, 12, and 24 months after surgery. The main criterion for assessing the level of urinary continence was the number of pads used daily. Results: The distribution of overall continence rates in the BNP vs. no-BNP group at 3, 6 and 12 months was 86% vs. 60% (p < 0.0001), 89% vs. 67% (p < 0.0001), 93% vs. 83% (p = 0.022). Continence rates in non-posterior reconstruction group (10%, 22%, 34%, and 54% at 1, 3, 6, and 12 months) were statistically significantly lower (p < 0.0001). The patients who underwent urethral suspension exhibited significantly higher rates of overall continence at 1 mo (73% vs. 29%, p < 0.0001), 3 mo (85% vs. 53%, p < 0.001), 6 mo (89% vs. 62%, p < 0.0001), 12 mo (95% vs. 76%, p < 0.0001), and 24 mo (93% vs. 81%, p = 0.007). Patients who underwent urethral suspension had a four-fold greater likelihood of regaining continence (p = 0.015). Conclusions: Patients who underwent urethral suspension or BNP or posterior reconstruction had higher continence rates. Only the urethral suspension was found to be a significant prognostic factor of continence recovery.

19 August 2022 in Applied Sciences
Verified
Journal Article
Open access
PDF file
BKBoris Kajmakovic
Boris Kajmakovic
MPMiloš Milivoje Petrović
Miloš Milivoje Petrović
PBPetar Bulat
Petar Bulat
Uros BumbasirevicUros Bumbasirevic
Uros Bumbasirevic
BMBogomir Milojevic
Bogomir Milojevic
ZDZoran Dzamic
Zoran Dzamic
Background: Bladder neck preservation (BNP) has been adopted in open (ORP), laparoscopic (LRP), and robot-assisted radical prostatectomy (RARP). However, there are concerns that this technique can compromise oncological outcome and increase positive surgical margins (PSM). The aim was to evaluate the outcome of BNP, focusing on surgical and pathological outcomes, as well as biochemical recurrence (BCR). Methods: We prospectively collected demographic and clinical data from 170 consecutive patients who underwent ORP and LRP between 2014 and 2020. ORP was performed in 63 patients, and the rest underwent LRP. BNP was performed in 85 patients. Results: PSM were found in 24.7% of patients. Of patients with BNP, 22.4% had PSM. There was no significant statistical difference between patients with or without BNP in the form of PSM. Base-positive margins were detected in 9.4% of patients with BNP and in 5.9% of patients without BNP with no statistical significance. Bioptic Gleason score, clinical stage, and preoperative PSA were statistically significantly correlated with PSM. BCR was more common in patients without BNP (23.5%) vs. non-BNP (21.2%). The only statistically significant predictor of BCR was PSM. Conclusion: This study suggests that BNP in RP is not associated with an increased level of PSM. Preoperative PSA, bioptic Gleason score, and clinical T stage of disease were identified as predictors of PSM occurrence.

16 March 2025 in Medicina
Verified
Journal Article
Open access
PDF file
SKSladjana Kovacevic
Sladjana Kovacevic
IVIvan Vuković
Ivan Vuković
Uros BumbasirevicUros Bumbasirevic
Uros Bumbasirevic
MZMarko Zivkovic
Marko Zivkovic
SSslavisa Savic
slavisa Savic
BCBojan Cegar
Bojan Cegar
Background and Objectives: Stress urinary incontinence (SUI) impacts 4–50% of adult women, frequently resulting in embarrassment, diminished self-esteem, and social withdrawal, significantly affecting quality of life. The aim of our study is to cross-culturally adapt and validate the Urinary Incontinence Outcome Questionnaire (IOQ) for the Serbian population and to assess the multifaceted impact of SUI on the quality of life among women. Materials and Methods: A cross-sectional study involved a total of 150 women: 100 undergoing surgical management for SUI (ST group) and 50 receiving non-surgical treatments, including vaginal estrogen, pessaries, electrical stimulation, or collagen fillers (NST group). The participants completed questionnaires on demographics, fatigue (MFI), anxiety and depression (HADS), and quality of life (SF-36), as well as the IOQ. Results: The ST group had a mean age of 60.0 ± 10.0 years, with 65% married, 65% with secondary education, 62% non-smokers, and 78% with comorbid conditions, primarily cardiovascular disease (59%). The NST group showed similar characteristics, with a significant difference in cardiovascular comorbidity (p = 0.049). All IOQ subscales demonstrated good internal consistency (Cronbach alpha > 0.7), except for the subscale Complications (Cronbach alpha = 0.440). The IOQ score for “Symptoms pre-operative” had the highest mean value (62.8 ± 18.6), while “Hospital Re-admission” had the lowest (303 ± 17.1). A comparison of the SF-36 scores showed significant differences in the Energy (p = 0.025) and Emotional well-being (p = 0.015) domains between the ST and NST groups. Conclusions: The Serbian version of the IOQ has been validated, demonstrating psychometric features that endorse its application in clinical and research contexts. This study highlights the significant impact of SUI on quality of life and the need for a comprehensive approach to treatment. The results emphasize the importance of addressing both the physical and psychological aspects of SUI to improve the lives of affected women.