Ștefan Popa

Ștefan Popa

*This is an algorithmically generated author record based on publicly available information.

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Ștefan Popa has a total of 31 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Open Access

    Temporal Lactate Kinetics and Tissue Lactate Burden in Experimental Skeletal Muscle Ischemia–Reperfusion: Associations with Inflammation, Cellular Injury, and Oxidative Stress

    by Alina Belu, Nina Filip, Bogdan Ionel Tamba, Oriana-Maria Onicescu, Gabriela Bordeianu, Alexandru Filip, Alina Jehac, Ștefan Popa, Răzvan Tudor, Rodica Elena Heredea, et al.

    Background: Skeletal muscle ischemia–reperfusion (I/R) induces metabolic, inflammatory, and oxidative disturbances that may persist after restoration of blood flow. This study evaluated circulating lactate kinetics together with tissue lactate, inflammatory, cellular injury, and oxidative markers following experimental skeletal muscle I/R. Methods: Animals subjected to skeletal muscle I/R were compared with vascular I/R, bone fracture, sham, and control groups. Circulating lactate, PO2, glucose, hematocrit, and calculated oxygen saturation were assessed immediately after ischemia, approximately 15 min after reperfusion, and approximately 2 h after reperfusion. Tissue and plasma lactate, lactate dehydrogenase (LDH), interleukin-6 (IL-6), malondialdehyde (MDA), and superoxide dismutase (SOD) were also evaluated. Results: In the skeletal muscle I/R group, circulating lactate decreased from 2.19 ± 0.67 mmol/L immediately after ischemia to 1.44 ± 0.84 mmol/L during early reperfusion, before rising to 3.33 ± 1.15 mmol/L at approximately 2 h (Friedman p < 0.001), resulting in a negative lactate clearance. This biphasic pattern contrasted with the progressive decline in lactate observed in the vascular I/R and bone fracture groups. Tissue lactate was markedly elevated (11.96 ± 1.27 mmol/L) and showed positive correlations with MDA (ρ = 0.802), IL-6 (ρ = 0.741), and LDH (ρ = 0.671), all p < 0.001. Conclusions: Skeletal muscle I/R was characterized by a late increase in circulating lactate together with elevated tissue lactate and biochemical evidence of inflammatory activation, cellular injury, and oxidative stress. Serial lactate assessment may provide complementary information on post-ischemic metabolic recovery, although further validation is required.

  • Open Access

    Age-Related Patterns in Pediatric Road Traffic Injuries in Romania

    by Ștefan Popa, Carmen Iulia Ciongradi, Adrian Onisim Surd, Ioan Sârbu, Iuliana-Laura Candussi, Irene Paula Popa

    Background: Pediatric road traffic injuries (RTIs) represent a significant public health concern, particularly in countries like Romania, where road infrastructure and safety remain challenges. Despite recent economic reclassification, Romania continues to report high rates of pediatric traffic-related injuries. Non-fatal RTIs often result in long-term physical and psychological harm. This study aims to assess age- and gender-specific injury patterns and mechanisms of non-fatal RTIs in children and adolescents, using data from “St. Mary’s” Emergency Clinical Hospital for Children in Iași over a ten-year period to inform targeted prevention strategies. Methods: This 10-year retrospective study (2015–2024) was conducted at “St. Mary’s” Emergency Clinical Hospital for Children in Iași, Romania, a regional referral center. Data from 1074 pediatric patients (aged 1 month–17 years, 11 months) with RTIs were analyzed using ICD-10 codes and verified manually. Variables included demographics, injury type, mechanism, and treatment. Patients were stratified into four age groups. Statistical analysis was performed using IBM SPSS Statistics 25, with significance set at p < 0.05. Results: The highest incidence was observed among boys (77.7%) and children aged 10–14 years. Car passengers and cyclists constituted the most frequently affected groups, with only 11% of passengers appropriately restrained and 78% of cyclists not wearing helmets. Common injuries included excoriations, thoracic contusions, and abdominal trauma, with notable variations by age and sex. Thoracic injuries were more frequent among girls, whereas younger children exhibited a higher incidence of abdominal trauma. Conclusions: The findings emphasize critical safety gaps in child restraint and helmet use and highlight the urgent need for targeted, age-specific road safety interventions and improved public health education.

  • Open Access

    Arterial Hypertension: Novel Pharmacological Targets and Future Perspectives

    by Irene Paula Popa, Andreea Clim, Alin Constantin Pînzariu, Cristina Iuliana Lazăr, Ștefan Popa, Ivona Maria Tudorancea, Mihaela Moscalu, Dragomir N. Șerban, Ionela Lăcrămioara Șerban, Irina-Iuliana Costache-Enache, et al.

    Arterial hypertension (HTN) is one of the major global contributors to cardiovascular diseases and premature mortality, particularly due to its impact on vital organs and the coexistence of various comorbidities such as chronic renal disease, diabetes, cerebrovascular diseases, and obesity. Regardless of the accessibility of several well-established pharmacological treatments, the percentage of patients achieving adequate blood pressure (BP) control is still significantly lower than recommended levels. Therefore, the pharmacological and non-pharmacological management of HTN is currently the major focus of healthcare systems. Various strategies are being applied, such as the development of new pharmacological agents that target different underlying physiopathological mechanisms or associated comorbidities. Additionally, a novel group of interventional techniques has emerged in recent years, specifically for situations when blood pressure is not properly controlled despite the use of multiple antihypertensives in maximum doses or when patients are unable to tolerate or desire not to receive antihypertensive medications. Nonetheless, reducing the focus on antihypertensive medication development by the pharmaceutical industry and increasing recognition of ineffective HTN control due to poor drug adherence demands ongoing research into alternative approaches to treatment. The aim of this review is to summarize the potential novel pharmacological targets for the treatment of arterial hypertension as well as the future perspectives of the treatment strategy.


  • Open Access

    Trauma Outcomes in Pediatric Nonfatal Road Traffic Accidents

    by Ștefan Popa, Diana Bulgaru-Iliescu, Carmen Iulia Ciongradi, Adrian Onisim Surd, Iuliana-Laura Candussi, Irene Paula Popa, Ioan Sârbu

    Background: By 2025, road traffic injuries are projected to rank third in the global burden of disease, posing a significant challenge that affects health, social well-being, and economic aspects. According to data from the Romanian Police National Statistics Center, there have been an average of 342 traffic accidents per year involving pediatric patients over the past 10 years. Materials and Methods: A retrospective research study was conducted, encompassing 358 cases of road traffic accidents identified for the study, with data collected over a span of eight years, and with the aim of analyzing the types of injury and treatment methods in relation to age and sex, while also focusing on the duration of hospitalization and the occurrence of complications. Results: An oscillating trend is observed from 2015 to 2020, with its lowest value recorded in 2017 at around 6.8% and its peak in 2019 at 20.1%. Notably, post-pandemic (COVID-19), the cases underwent a substantial decline of approximately 60%. At least 78.7% of those who did not undergo orthopedic reduction required surgery, whereas among those who underwent orthopedic reduction, only 23.4% needed surgery. Regarding the frequency of complications 17.3% of the total cases experienced complications. Conclusions: According to our findings, age has a significant effect on the type of accident (p < 0.05). Complications occurred in 17.3% of patients, most commonly surgical (24 cases, 38.7%), orthopedic (17 cases, 27.4%), and neurological (15 cases, 24.2%).


  • Open Access

    Trauma Outcomes in Pediatric Nonfatal Road Traffic Accidents

    by Ștefan Popa, Diana Bulgaru-Iliescu, Carmen Iulia Ciongradi, Adrian Onisim Surd, Iuliana-Laura Candussi, Irene Paula Popa, Ioan Sârbu

    Background: By 2025, road traffic injuries are projected to rank third in the global burden of disease, posing a significant challenge that affects health, social well-being, and economic aspects. According to data from the Romanian Police National Statistics Center, there has been an average of 342 traffic accidents per year involving pediatric patients over the past 10 years. Materials and Methods: A retrospective research study was conducted, encompassing 358 cases of road traffic accidents identified for the study. Data collection was conducted at "St. Mary’s" Emergency Hospital for Children in Iasi, Romania, from January 2015 to December 2022. To facilitate statistical analyses, participants were categorized into three specific age groups, correlating between the anatomical region affected and different types of accidents was examined, and the classification of injury types was determined based on the characteristics of the harm inflicted. Results: An oscillating trend is observed from 2015 to 2020, with its lowest value recorded in 2017 at around 6.8% and its peak in 2019 at 20.1%. Notably, post-pandemic (Covid-19), the cases underwent a substantial decline of approximately 50%. At least 78.7% of those who did not undergo orthopedic reduction required surgery, whereas among those who underwent orthopedic reduction, only 23.4% needed surgery. Regarding the frequency of complications 7,9% of the total cases experienced complications. Conclusion: The increased frequency of pediatric traffic accidents is attributed to the extensive services provided by "St. Mary’s" Emergency Hospital for Children, Iasi, to a significant number of patients from both rural and urban areas across the seven counties of the Moldova, Romania.


  • Open Access

    Current Epidemiological Trends of Pediatric Traffic Accidents at a Romanian Clinical Hospital

    by Ștefan Popa, Ioan Sârbu, Carmen Iulia Ciongradi, Irene Paula Popa, Diana Bulgaru-Iliescu

    Background: Pediatric road traffic accidents (RTAs) have a substantial impact on the worldwide youth population, resulting in a considerable burden of disability. According to the World Health Organization’s (WHO) Global Status Report on Road Safety, around 1.35 million children die each year in RTAs around the world, having a big effect on health and financial costs. Today’s high-income countries like the Netherlands have experienced a decrease in the incidence of fatal traffic accidents (TAs) in children compared to countries with higher-than-average scores, including Romania, where roughly one out of every two minor deaths was a pedestrian; however, there is a lack of comprehensive and up-to-date epidemiological data on non-fatal TAs regarding pediatric patients. The objective of this study is to perform a thorough examination of the epidemiological aspects of Tas in pediatric patients admitted to the Emergency Department (ED) of “St. Mary’s” Emergency Clinical Hospital for Children in Iasi, Romania. Materials and methods: A descriptive retrospective research study was conducted at the “St. Mary’s” Emergency Clinical Hospital for Children in Iasi, Romania, from January 2015 to December 2022. The research population includes all pediatric trauma patients that were between the age range of 1 month and 18 years who were treated by the trauma department. A total of 358 cases met the inclusion criteria and fulfilled fulfilled fulfilled. Data concerning variables such as accident incidents, types of injuries, and length of hospitalization have been gathered. Results: The average age of the patients was 11.43 ± 4.07 years, with patients of both sexes, the representation of the male sex being 78.5%. The incidence occurred during the summer, representing 15.3% in June. Of the patients admitted to the ED, 55.5% (n = 196) did not require surgery. Most of the patients spent from a minimum of one day to a maximum of 28 days in the hospital, with an average of 8.50 hospital days. The most common injuries were fractures (n = 221), and the most frequent anatomical region affected was the upper limbs (n = 55.2%). Conclusion: While the literature on fatal TA cases shows a declining trend, there is a lack of up-to-date information on non-fatal TAs involving children. The results of our study suggest that there is a high incidence of pediatric TAs due to the scale of “St. Mary’s” Emergency Clinical Hospital for Children, from Iasi, which provides medical services to a considerable number of patients coming from both rural and urban areas of the seven counties of Moldova region, in Romania.


  • Open Access

    Traffic Accidents in Children and Adolescents: A Complex Orthopedic and Medico-Legal Approach

    by Ștefan Popa, Carmen Iulia Ciongradi, Ioan Sârbu, Ovidiu Bîcă, Irene Paula Popa, Diana Bulgaru-Iliescu

    Traffic accidents involving children and adolescents present complex challenges from both the medico-legal and orthopedic standpoints. Despite the implementation of road traffic safety laws, pediatric road traffic injuries continue to be a significant contributor to mortality rates, physical harm, and hospitalization on a global scale. For children and young people, automobile accidents are considered to be the primary culprit of mortality in developed nations. Even in highly developed nations, trauma is a significant factor in infant mortality. Each age category, from childhood to young adulthood, has its fracture patterns, as their skeletons are considerably different from those of adults. The consequences of traffic accidents extend beyond the immediate physical trauma. The medico-legal aspects surrounding these incidents add another layer of complexity, as legal repercussions may affect the responsible adult or parent, particularly in cases involving child fatalities. To effectively address traffic accidents in children and adolescents, a comprehensive approach is necessary. This approach should involve not only medical professionals but also legal experts and policymakers. Collaboration between orthopedic specialists, medico-legal professionals, law enforcement agencies, and relevant government bodies can facilitate the development and implementation of strategies aimed at prevention, education, the enforcement of traffic laws, and improved infrastructure. By addressing both the medical and legal aspects, it is possible to enhance road safety for children and adolescents, reducing the incidence of injuries and their associated long-term consequences. In this review, we aimed to summarize traffic accidents in children and adolescents from a complex orthopedic and medico-legal approach.


  • Open Access

    Prenatally Diagnosed Infantile Myofibroma of Sartorius Muscle—A Differential for Soft Tissue Masses in Early Infancy

    by Ștefan Popa, Dan Apostol, Ovidiu Bîcă, Diana Benchia, Ioan Sârbu, Carmen Iulia Ciongradi

    Background: Infantile myofibromatosis (IM) is a soft tissue disease with solitary or multiple benign tumors, and an etiology still unknown. IM is a mesenchymal disorder of early infancy and is more frequent in males. IM may present as a solitary lesion of the skin, bone, muscle, subcutaneous tissue, located at the head, neck, and trunk, with good prognosis; or, as a multicentric form, with or without visceral involvement (heart, lung, gastrointestinal tract, kidney), with a poor prognosis. The definitive diagnosis of IM is confirmed by pathology. Treatment may be conservative, surgical, or chemotherapeutical. Case presentation: A two months old female patient, prenatally diagnosed at 30 weeks, presenting with a tumor on the antero-internal aspect of the left thigh. She was admitted due to rapid postnatal evolution, and the patient required surgery for tumor resection. Previously, clinically, biological and imaging investigations were performed, but the final diagnosis was histological and by immunostaining. The patient had a favorable postoperative outcome. Conclusions: Despite its low frequency, IM should be considered in the differential diagnosis of soft tissue masses at an early age. The clinical form (solitary or multicentric), location, and visceral involvement will dictate the treatment and prognosis.