Stefanos Bitsianis

Dr. Stefanos Bitsianis

orcid

Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

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

Representative Publications

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1 February 2024 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
SSSavvas Symeonidis
Savvas Symeonidis
IMIoannis Mantzoros
Ioannis Mantzoros
EAElissavet Anestiadou
Elissavet Anestiadou
OIOrestis Ioannidis
Orestis Ioannidis
PCPanagiotis Christidis
Panagiotis Christidis
SAStamatis Angelopoulos
Stamatis Angelopoulos
Background: Intraoperative biliary anatomy recognition is crucial for safety during laparoscopic cholecystectomy, since iatrogenic bile duct injuries represent a fatal complication, occurring in up to 0.9% of patients. Indocyanine green fluorescence cholangiography (ICG-FC) is a safe and cost-effective procedure for achieving a critical view of safety and recognizing early biliary injuries. The aim of this study is to compare the perioperative outcomes, usefulness and safety of standard intraoperative cholangiography (IOC) with ICG-FC with intravenous ICG. Methods: Between 1 June 2021 and 31 December 2022, 160 patients undergoing elective LC were randomized into two equal groups: Group A (standard IOC) and group B (ICG-FC with intravenous ICG). Results: No significant difference was found between the two groups regarding demographics, surgery indication or surgery duration. No significant difference was found regarding the visualization of critical biliary structures. However, the surgeon satisfaction and cholangiography duration presented significant differences in favor of ICG-FC. Regarding the inflammatory response, a significant difference between the two groups was found only in postoperative WBC levels. Hepatic and renal function test results were not significantly different between the two groups on the first postoperative day, except for direct bilirubin. No statistically significant difference was noted regarding 30-day postoperative complications, while none of the complications noted included bile duct injury events. Conclusions: ICG-FC presents equivalent results to IOC regarding extrahepatic biliary visualization and postoperative complications. However, more studies need to be performed in order to standardize the optimal dose, timing and mode of administration.

22 July 2025 in Diseases
Verified
Journal Article
Open access
PDF file
OIOrestis Ioannidis
Orestis Ioannidis
EAElissavet Anestiadou
Elissavet Anestiadou
AKAGGELIKI KOLTSIDA
AGGELIKI KOLTSIDA
JRJose-M Ramirez
Jose-M Ramirez
NFNicolò Fabbri
Nicolò Fabbri
SSSavvas Symeonidis
Savvas Symeonidis
Background/Objectives: Despite advancements in surgery, esophagectomy remains one of the most challenging and complex gastrointestinal surgical procedures, burdened by significant perioperative morbidity and mortality rates, as well as high financial costs. Recognizing the need for standardized care provided by a multidisciplinary healthcare team, the EUropean PErioperative MEdical Networking (EUPEMEN) initiative developed a dedicated protocol for perioperative care of patients undergoing esophagectomy, aiming to enhance recovery, reduce morbidity, and homogenize care delivery across European healthcare systems. Methods: Developed through a multidisciplinary European collaboration of five partners, the protocol incorporates expert consensus and the latest scientific evidence. It addresses the entire perioperative pathway, from preoperative preparation to hospital discharge and postoperative recovery, emphasizing patient-centered care, risk mitigation, and early functional restoration. Results: The implementation of the EUPEMEN esophagectomy protocol is expected to improve patient outcomes through a day-by-day structured prehabilitation plan, meticulous intraoperative management, and proactive postoperative rehabilitation. The approach promotes reduced postoperative complications, earlier return to oral intake, and shorter hospital stays, while supporting multidisciplinary coordination. Conclusions: The EUPEMEN protocol for esophagectomy provides a comprehensive guideline framework for optimizing perioperative care in esophageal surgery. In addition, it serves as a practical guide for healthcare professionals committed to advancing surgical recovery and standardizing clinical practice across diverse care environments across Europe.

19 March 2025 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
OIOrestis Ioannidis
Orestis Ioannidis
EAElissavet Anestiadou
Elissavet Anestiadou
JRJose-M Ramirez
Jose-M Ramirez
NFNicolò Fabbri
Nicolò Fabbri
JUJavier Martínez Ubieto
Javier Martínez Ubieto
SSSavvas Symeonidis
Savvas Symeonidis
Background/Objectives: Gastric cancer remains a leading cause of cancer-related deaths worldwide and surgical resection represents the mainstay of treatment procedures. However, despite the advancements noted in the field of surgical oncology, perioperative complications and variability in the perioperative care provided persist. To address the challenges caused by non-standardized perioperative care for gastric surgery across European healthcare systems, the EUropean PErioperative MEdical Networking (EUPEMEN) protocol has been developed. The present study concisely provides the EUPEMEN protocol’s development, implementation, and impact on perioperative management in gastric resections. Methods: The EUPEMEN protocol was developed through a multidisciplinary collaboration involving five academic healthcare professionals from four European countries. The main activities of the collaborative group included a literature review, consensus development, the creation of multimodal rehabilitation manuals, and the development of an online learning platform. The EUPEMEN project aims for the uniform adoption of evidence-based practices across preoperative, intraoperative, and postoperative phases, leading in nutritional, psychological, and physiological optimization. Results: The implementation of the EUPEMEN protocol aims to optimize perioperative outcomes, including reduced postoperative complications, a shorter length of hospitalization, and improved recovery trajectories. The above have been achieved through structured guidelines that ensure consistent care delivery across diverse healthcare settings and tools such as rehabilitation manuals and a free-access online educational platform. Conclusions: The EUPEMEN protocol represents a new standard for perioperative care in the field of gastric surgery that is based on multidisciplinary collaboration and evidence-based practices. While challenges such as resource constraints and variability in adherence remain, the protocol demonstrates significant potential to improve patient outcomes and streamline perioperative management. Future research should focus on long-term effects and adaptation challenges in the setting of non-European healthcare systems.

18 November 2024 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
OIOrestis Ioannidis
Orestis Ioannidis
EAElissavet Anestiadou
Elissavet Anestiadou
JRJose-M Ramirez
Jose-M Ramirez
NFNicolò Fabbri
Nicolò Fabbri
JUJavier Martínez Ubieto
Javier Martínez Ubieto
SSSavvas Symeonidis
Savvas Symeonidis
Background/Objectives: Acute appendicitis (AA) is one of the most common causes of emergency department visits due to acute abdominal pain, with a lifetime risk of 7–8%. Managing AA presents significant challenges, particularly among vulnerable patient groups, due to its association with substantial morbidity and mortality. Methods: The EUPEMEN (European PErioperative MEdical Networking) project aims to optimize perioperative care for AA by developing multidisciplinary guidelines that integrate theoretical knowledge and clinical expertise from five European countries. This study presents the key elements of the EUPEMEN protocol, which focuses on reducing surgical stress, optimizing perioperative care, and enhancing postoperative recovery. Results: Through this standardized approach, the protocol aims to lower postoperative morbidity and mortality, shorten hospital stays, and improve overall patient outcomes. The recommendations are tailored to address the variability in clinical practice across Europe and are designed to be widely implementable in diverse healthcare settings. Conclusions: The conclusions drawn from this study highlight the potential for the EUPEMEN protocol to significantly improve perioperative care standards for AA, demonstrating its value as a practical, adaptable tool for clinicians.

26 May 2025 in Medicina
Verified
Journal Article
Open access
PDF file
OIOrestis Ioannidis
Orestis Ioannidis
AKAGGELIKI KOLTSIDA
AGGELIKI KOLTSIDA
EAElissavet Anestiadou
Elissavet Anestiadou
JRJose-M Ramirez
Jose-M Ramirez
NFNicolò Fabbri
Nicolò Fabbri
SSSavvas Symeonidis
Savvas Symeonidis
Hepatectomies play a crucial role in the multidisciplinary management of primary and secondary liver malignancies but are associated with significant risks, including 30-day mortality, morbidity, prolonged hospitalization, and increased resource utilization. Optimizing perioperative care remains a challenge; however, enhanced recovery programs have shown improved patient outcomes. The EUPEMEN (EUropean PErioperative MEdical Networking) protocol focuses on improving the perioperative management of liver resections through the establishment of interdisciplinary principles based on practical experience and theoretical frameworks from five European countries. This paper outlines the core elements of the EUPEMEN protocol, emphasizing strategies to minimize surgical stress, optimize perioperative care, and enhance postoperative recovery. The protocol is systematically designed to reduce postoperative mortality and morbidity, shorten hospital stays, and improve patient outcomes. The EUPEMEN guidelines address inconsistencies in surgical practice across Europe and are structured for implementation in various healthcare environments. “The protocol’s approach is designed to support improvements in perioperative care standards in liver resections and may serve as a practical and efficient tool for healthcare professionals, pending further clinical validation. The EUPEMEN protocol offers a standardized, evidence-based framework to enhance perioperative management in hepatectomies. By integrating multidisciplinary principles, the main target is to eliminate complications, improve surgical outcomes, and promote faster recovery. Its implementation across diverse clinical settings may contribute to advancing perioperative care standards for liver resections in Europe.

24 February 2026 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
OIOrestis Ioannidis
Orestis Ioannidis
EAElissavet Anestiadou
Elissavet Anestiadou
JRJose-M Ramirez
Jose-M Ramirez
NFNicolò Fabbri
Nicolò Fabbri
JUJavier Martínez Ubieto
Javier Martínez Ubieto
SSSavvas Symeonidis
Savvas Symeonidis
Background/Objectives: Obesity remains a major global health burden, with metabolic–bariatric surgery being the most efficient long-term treatment strategy. However, both variability in perioperative care and postoperative complications persist. To address these challenges, the EUropean PErioperative MEdical Networking (EUPEMEN) protocol for bariatric surgery was developed to standardize care and enhance perioperative outcomes across European healthcare settings. Methods: The protocol was formulated through close collaboration among experts from multiple disciplines, involving surgeons, anesthetists, nurses, and nutritionists. Its development included a literature review, expert consensus, and the creation of structured perioperative guidelines covering the preoperative, intraoperative, and postoperative phases. Focus areas include patient education, nutritional optimization, early mobilization, opioid-sparing analgesia, and minimally invasive surgical techniques, supported by educational materials and manuals. Technical activities included the development of detailed multimodal rehabilitation manuals translated into five languages, the creation of an open-access online learning platform, training of future educators through a “train the trainer” approach, organization of multiplier promotional events, international collaboration meetings to refine the protocol, and revision and standardization of existing perioperative care guidelines to ensure evidence-based, unified practices across Europe. Results: Implementation of the EUPEMEN protocol aims to reduce postoperative complications, enhance recovery, and decrease hospitalization time. Standardized rehabilitation pathways and access to free educational platforms promote consistent care delivery across diverse healthcare environments. Key strategies include early oral intake, limited use of invasive devices, and comprehensive patient preparation. Conclusions: The EUPEMEN protocol introduces an evidence-based, multidisciplinary framework for optimizing perioperative management in bariatric surgery. While variability in resources and adherence may present potential obstacles, its application holds significant promise for improving perioperative outcomes. Future studies are necessary to assess its long-term impact and adaptability in different healthcare settings.