Barış Demiriz

• Istanbul University Istanbul Faculty of Medicine
• Istanbul Bakırköy Dr. Sadi Konuk Training and Research Hospital
  

• Liv Hospital Ulus (2025 - )
• Ataköy Medicana Hospital, General Surgery and Mesenchymal Stem Cell Center Medical Director (2024-2025)
• Private Practice (2017-2024)
• Istanbul Esenyurt University, Faculty of Health Sciences, General Surgery, Assistant Professor (2017-2021)
• Private Beylikdüzü Kolan Hospital, Obesity and Metabolic Surgery Unit (2016-2017)
• Gaziantep Primer Hospital (2015-2016)
• University of Bristol, Bariatric Surgery
• Ankara Numune Training and Research Hospital, General Surgery (2010-2014)
• University of Michigan, Bariatric Surgery Clinic (2008-2009)
  

• A1. The relationship among acute-phase response proteins, cytokines and hormones in cachectic patients with colon cancer. Kemik O, Sumer A, Kemik AS, Hasirci I, Purisa S, Dulger AC, Demiriz B, Tuzun S. World J Surg Oncol. 2010 Sep 28;8(1):85.
• A2. A Novel Screening Biomarker in Gastric Cancer: Serum Dickkopf-1. Ismail Gomceli, Erdal B. Bostanci, Ilter Ozer, Ahu S. Kemik, Nesrin Turhan, Mesut Tez, Selim Kilic, Baris Demiriz and Musa Akoglu. HepatoGastroenterology. 2012; 59(117)
• A3. Gastric carcinogenesis. Ismail Gomceli, Baris Demiriz, Mesut Tez. World J Gastroenterol 2012; Oct 7; 18(37): 5161-5170.
• A4. Prognostic significance of the preoperative serum levels of soluble form of endoglin in gastric cancer patients. Ismail Gomceli, Mesut Tez, Erdal B. Bostanci, Ahu S. Kemik, Baris Demiriz, Musa Akoglu. Bratisl Lek Listy. 2013;114(10): 566-568.
• A5. A new and simple score for predicting cystobiliary fistula in patients with hepatic hydatid cysts. Saylam B, Coşkun F, Demiriz B, Vural V, Comçalı B, Tez M. Surgery. 2013 Jan 7. doi:pii: S0039-6060(12)00730-1. 10.1016/ j.surg.2012.11.017
• A6. Amyand's hernia: really a rare condition? Saylam B, Gülseren MO, Çomçalı B, Demiriz B, Tez M, Coşkun. Am Surg. 2013 Apr;79(4):443-4.
• A7. Comprasion of Laparoscopic and Conventional Methods in Peritoneal Dialysis Catheter Placement in Patients with End Stage Renal Diseases: Single Center Experience Peritoneal Dialysis catheter Placement. Demiriz B, Bulut M, Oğuz EG, Özkayar N, Turgut D, Pişkinpaşa S, Saylam B, Dede F. Turkish Nephrology, Dialysis and Transplantation Journal.
• A8. Retrospective evalution of the patients who were affected by syrian civil war. Kılıç E, Demiriz B, Uygur ML, Sürücü M, Çınar K, Yıldırım AE. GKDA 2015; 21(1): 30-34.
• A9. Alfentanil versus ketamine combined with propofol for sedation during upper gastrointestinal system endoscopy in morbidly obese patients. Kılınç E, Demiriz B, Işıkay N, Yıldırım AE, Can S, Basmacı C. Saudi Med J 2016; Vol 37(11):179-183.
• A10. The effectiveness of laparoscopic sleeve gastrectomy surgical applied to morbidly obese adolescents: Bariatric surgery in adolescents. M. Doğan, B. Demiriz. The Injector, 2023; 2(3): 178-182.

• B1. Kapan, S., Alis, H., Turhan, A., Oner, O., Kalayci, M., Kutukcu, E., Dolay, K., Demiriz, B., Hatipoglu, S. and E. Aygun, “Nonoperative management of blunt and penetrating splenic traumas” 7th European Congress of Trauma and Emergency Surgery, 6-9 September, Malmo, Sweden, 2006.
• B2. Kalayci, M., Kutukcu, E., Turhan, A., Kapan, S., Alis, H., Oner, O., Dolay, K., Demiriz, B., Hatipoglu, S., Dodur, B. and E. Aygun, “Operative and nonoperative management of acute appendicitis”, 7th European Congress of Trauma and Emergency Surgery, 6-9 September, Malmo, Sweden, 2006.
• B3. Dolay, K., Kapan, S.E., Soylu, A., Turhan, A.N., Demiriz, B., Oner, O.Z., Alis, H. and E. Aygun, “Gastroscopic extraction of ingested pins teased in the duodenum” 15th International Congress of the European Association for Endoscopic Surgery, 4-7 July, Athens, Greece, 2007.
• B4. Sakcak, I., Bostanoglu, S., Bostanoglu, A., Hamamcı, E., Yıldız, B., Demiriz, B., Tez, M., Avşar, F., “Comparison of the air-filled and liquid balloons in terms of efficacy adverse reactions and tolerance” 18th World Congress of International Federation for the Surgery of Obesity & Metabolic Disorders, Istanbul, Turkey, 2013.

D. Articles Published in National Peer-Reviewed Journals:

• D1. Künt ve penetran dalak yaralanmalarında nonoperatif yaklaşım. [Nonoperative approach in blunt and penetrating splenic injuries.] Selin Kapan, Ahmet Nuray Turhan, Halil Alış, Barış Demiriz, Berrin Dodur. Bakırköy Tıp Dergisi, 2005 Aralık, Cilt:1, Sayı:3.
• D2. Karaciğer hidatik kistinde laparoskopik perikistektomi: Olgu sunumu. [Laparoscopic pericystectomy for hepatic hydatid cysts: A case report.] Ahmet Nuray Turhan, Selin Kapan, Ersen Kütükçü, Barış Demiriz, Berrin Dodur, Erşan Aygün. Bakırköy Tıp Dergisi, 2005 Aralık, Cilt:1, Sayı:3.
• D3. Gebelikte kolesistitin laparoskopik tedavisi: Olgu sunumu. [Laparoscopic treatment of cholecystitis in pregnancy: A case report.] Melike Doğanay, Ayşegül Öksüzoğlu, Barış Demiriz, Nuri Danışman. Jinekoloji-Obstetrik ve Neonatoloji Tıp Dergisi, Mart 2010, Cilt:7, Sayı 25.
• D4. “Bariatrik Cerrahi Uygulanmış Hastalarda Endoskopi ve Endoskopik Tedavi Yöntemleri”, [Endoscopy and endoscopic treatment methods in patients who have undergone bariatric surgery.] Yıldırım AE, Altun R, Demiriz B. Güncel Gastroenteroloji, Aralık 2014; 18/4: 415-422.
• D5. “Suriye’deki İç Savaştan Etkilenen Yoğun Bakım Hastalarının Retrospektif Değerlendirmesi”, [Retrospective evaluation of intensive care patients affected by the Syrian civil war.] Kılıç E, Demiriz B, Uygur ML, Sürücü M, Çınar K, Yıldırım AE. GKDA Derg 21(1):30-34, 2015.

E. Papers Presented and Published in Proceedings of National Scientific Meetings

• E1. “Aynı hastada eş zamanlı çoklu laparoskopik girişimlerin morbidite üzerine etkisi”, [The effect of simultaneous multiple laparoscopic interventions on morbidity in the same patient.] Özmen M.M., Demiriz B., Gelecek S., Akgün A.E., Gündoğdu E., Moran M., Bilgiç İ. 10. Ulusal Endoskopik Laparoskopik Cerrahi Kongresi [10th National Endoscopic Laparoscopic Surgery Congress], 27-30 Nisan 2011, İstanbul, (2011).
• E2. “Laparoskopik nissen fundoplikasyonu sonrası hastalarda gastrointestinal hayat kalite indeksi (GIQLI)”, [Gastrointestinal quality of life index (GIQLI) in patients after laparoscopic Nissen fundoplication.] Gelecek S., Akgün A.E., Demiriz B., Bilgiç İ., Moran M., Gündoğdu E., Özmen M.M. 10. Ulusal Endoskopik Laparoskopik Cerrahi Kongresi [10th National Endoscopic Laparoscopic Surgery Congress], 27-30 Nisan 2011, İstanbul, (2011).
• E3. “Laparoskopik Mide Cerrahisi; Erken Sonuçlar”, [Laparoscopic gastric surgery; early outcomes.] Özmen M.M., Moran M., Demiriz B., Gündoğdu E., Bilgiç İ., Gelecek S., Aşlar A.K. 10. Ulusal Endoskopik Laparoskopik Cerrahi Kongresi [10th National Endoscopic Laparoscopic Surgery Congress], 27-30 Nisan 2011, İstanbul, (2011).
• E4. “Akut kolesistitte laparoskopik tedavinin yeri”, [The role of laparoscopic treatment in acute cholecystitis.] Demiriz B., Bilgiç İ., Dizen H., Gelecek S., Akgün A.E., Moran M., Özmen M.M., 10. Ulusal Endoskopik Laparoskopik Cerrahi Kongresi [10th National Endoscopic Laparoscopic Surgery Congress], 27-30 Nisan 2011, İstanbul, (2011).
• E5. “Sleeve gastrektomi planlanan obez hastada hiyatal herni tedavisinde laparoskopik meşli krus tamiri (Video Bildiri)”, [Laparoscopic mesh-reinforced crural repair for hiatal hernia in obese patients planned for sleeve gastrectomy (Video Presentation).] Özmen M.M., Demiriz B., Gelecek S., Bilgiç İ., Gündoğdu E., Balcı Z. 10. Ulusal Endoskopik Laparoskopik Cerrahi Kongresi [10th National Endoscopic Laparoscopic Surgery Congress], 27-30 Nisan 2011, İstanbul, (2011).
• E6. “Laparoskopik redo nissen fundoplikasyon (Video Bildiri)”, [Laparoscopic redo Nissen fundoplication (Video Presentation).] Özmen M.M., Gelecek S., Moran M., Demiriz B., Bilgiç İ., Kılınç U. 10. Ulusal Endoskopik Laparoskopik Cerrahi Kongresi [10th National Endoscopic Laparoscopic Surgery Congress], 27-30 Nisan 2011, İstanbul, (2011).
• E7. “Pankreas Solid Psödopapiller Tümörde Laparoskopik Distal Pankreatektomi ve Splenektomi (Video Bildiri)”, [Laparoscopic distal pancreatectomy and splenectomy for pancreatic solid pseudopapillary tumor (Video Presentation).] Özmen M.M., Moran M., Gündoğdu E., Akgün A.E., Demiriz B., Gelecek S., 10. Ulusal Endoskopik Laparoskopik Cerrahi Kongresi [10th National Endoscopic Laparoscopic Surgery Congress], 27-30 Nisan 2011, İstanbul, (2011). (Received Congress Video Presentation Award).
• E8. “Laparoskopik nissen fundoplikasyonu sonrası hastalarda gastrointestinal hayat kalitesi indeksi (GIQLI)”, [Gastrointestinal quality of life index (GIQLI) in patients after laparoscopic Nissen fundoplication.] Barış Demiriz, Sibel Gelecek, Uğur Kılınç, İsmail Bilgiç, Münevver Moran, Mahir Özmen. 18. Ulusal Cerrahi Kongresi [18th National Surgery Congress], 23-27 Mayıs 2012, İzmir (2012).
• E9. “MPV (Mean Platelet Volume) akut mezenter iskeimde prognostik bir faktör müdür?”, [Is MPV (Mean Platelet Volume) a prognostic factor in acute mesenteric ischemia?] İsmail Bilgiç, Sibel Gelecek, Barış Demiriz, A. Keşşaf Aşlar, Münevver Moran, M. Mahir Özmen. 18. Ulusal Cerrahi Kongresi [18th National Surgery Congress], 23-27 Mayıs 2012, İzmir (2012).
• E10. Alış, H., Turhan, AN., Kapan, S., Dolay, K., Kalaycı, M., Kütükcü, E., Öner, O., Ede, B., Dodur, B., Demiriz, B., Yiğitbaş, H. and E. Aygün, “Kesici delici alet yaralanmaları: Tek merkez deneyimi”, [Cutting and piercing instrument injuries: Single-center experience.] 5. Ulusal Travma ve Acil Cerrahi Kongresi [5th National Trauma and Emergency Surgery Congress], 16-20 Kasım, Side, Antalya, (2005).
• E11. Alış, H., Turhan, AN., Kapan, S., Kütükcü, E., Dolay, K., Kalaycı, M., Ede, B., Dodur, B., Demiriz, B., Öner, O. and E. Aygün, “Delici kesici alet yaralanmalarında selektif yaklaşımın güvenilirliği”, [The reliability of a selective approach in piercing and cutting instrument injuries.] 5. Ulusal Travma ve Acil Cerrahi Kongresi [5th National Trauma and Emergency Surgery Congress], 16-20 Kasım, Side, Antalya, (2005).
• E12. Öner, O., Turhan, AN., Dolay, K., Ede, B., Yiğitbaş, H., Demiriz, B. and E. Aygün, “Peptik ülser perforasyonunda laparoskopik ve açık cerrahi girişim sonuçlarının karşılaştırılması”, [Comparison of outcomes of laparoscopic and open surgical interventions in peptic ulcer perforation.] 5. Ulusal Travma ve Acil Cerrahi Kongresi [5th National Trauma and Emergency Surgery Congress], 16-20 Kasım, Side, Antalya, (2005).
• E13. Alış, H., Dodur, B., Çikot, M., Ede, B., Demiriz, B., Kütükçü, E., Öner, O., Dolay, K., Kalaycı, M. and E. Aygün, “DKAY’larında selektif yaklaşımın maliyetler üzerine etkisi”, [The effect of a selective approach on costs in cutting and piercing instrument injuries.] 5. Ulusal Travma ve Acil Cerrahi Kongresi [5th National Trauma and Emergency Surgery Congress], 16-20 Kasım, Side, Antalya, (2005).
• E14. Dolay, K., Aygün, E., Demiriz, B., Alış, H., Kalaycı, M. and Aİ. Taşcı, “Sistoskopi sırasında oluşan rektal yaralanma sonrası idrar fistülünün endoskopik fibrin yapıştırıcı ve klipleme ile tedavisi”, [Endoscopic treatment of a urinary fistula after rectal injury during cystoscopy with fibrin glue and clipping.] 7. Ulusal Endoskopik Laparoskopik Cerrahi Kongresi [7th National Endoscopic Laparoscopic Surgery Congress], 18-21 Eylül, İstanbul, (2005).
• E15. Ahmet Nuray Turhan, Selin Kapan, Ersen Kütükçü, Barış Demiriz, Berrin Dodur, Erşan Aygün. “Karaciğer hidatik kistinde laparoskopik perikistektomi: Olgu sunum”, [Laparoscopic pericystectomy for hepatic hydatid cyst: A case report.] 7. Ulusal Endoskopik Laparoskopik Cerrahi Kongresi [7th National Endoscopic Laparoscopic Surgery Congress], 18-21 Eylül, İstanbul, (2005).
• E16. Kemal Dolay, Erşan Aygün, Barış Demiriz, Halil Alış, Mustafa Kalaycı, Ali İhsan Taşçı. “Sistoskopi sırasında oluşan rektal yaralanma sonrası idrar fistülünün endoskopik fibrin yapıştırıcı ve klipleme ile tedavisi”, [Endoscopic treatment of a urinary fistula after rectal injury during cystoscopy with fibrin glue and clipping.] 7. Ulusal Endoskopik Laparoskopik Cerrahi Kongresi [7th National Endoscopic Laparoscopic Surgery Congress], 18-21 Eylül, İstanbul (2005).
• E17. “Gastroscopic extraction of ingested pins teased in the duodenum”, 8. Ulusal Endoskopik Laparoskopik Cerrahi Kongresi [8th National Endoscopic Laparoscopic Surgery Congress], 1-4 Temmuz, Antalya (2007).
• E18. Sibel Gelecek, Barış Demiriz, A. Keşşaf Aşlar, Münevver Moran, M. Mahir Özmen, “Von Hippel Lindau Sendromlu hastada laparoskopik sol total sağ parsiyel sürrenalektomi”, [Laparoscopic left total and right partial adrenalectomy in a patient with Von Hippel-Lindau Syndrome.] 18. Ulusal Cerrahi Kongresi [18th National Surgery Congress], 23-27 Mayıs 2012, İzmir (2012).
• E19. Barış Demiriz, Sibel Gelecek, Zeynep Balcı, Münevver Moran, Mahir Özmen, “Sleeve gastrektomi planlanan hastalarda hiyatal herniye dikkat”, [Attention to hiatal hernia in patients planned for sleeve gastrectomy.] 18. Ulusal Cerrahi Kongresi [18th National Surgery Congress], 23-27 Mayıs 2012, İzmir (2012).
• E20. Sibel Gelecek, Emre Gündoğdu, Barış Demiriz, İsmail Bilgiç, Münevver Moran, M. Mahir Özmen, “Morbid obezitede laparoskopik ayarlanabilir gastrik band ve laparoskopik sleeve gastrektomi operasyonlarının karşılaştırılması”, [Comparison of laparoscopic adjustable gastric banding and laparoscopic sleeve gastrectomy operations in morbid obesity.] 18. Ulusal Cerrahi Kongresi [18th National Surgery Congress], 23-27 Mayıs 2012, İzmir (2012).
• E21. Mahir Özmen, Barış Demiriz, Sibel Gelecek, İsmail Bilgiç, Emre Gündoğdu, Münevver Moran, “Laparoskopik Mide Kanseri Cerrahisi”, [Laparoscopic gastric cancer surgery.] 18. Ulusal Cerrahi Kongresi [18th National Surgery Congress], 23-27 Mayıs 2012, İzmir (2012).

• "Diabetes Mellitus El Kitabı" [Diabetes Mellitus Handbook], translation and translation editing, Nobel Tıp Kitapevi, 2008.
• "Acil Cerrahi Kitabı" [Emergency Surgery Book], index, Nobel Tıp Kitapevi, 2009.
• "Harrison İç Hastalıkları Prensipleri Kendi Kendini Değerlendirme ve Board Sınavı için Gözden Geçirme" [Harrison's Principles of Internal Medicine Self-Assessment and Board Review], translation and translation editing, Nobel Tıp Kitapevi, 2009.
• "Harrison İç Hastalıkları El Kitabı" [Harrison's Manual of Medicine], translation and translation editing, Nobel Tıp Kitapevi, 2010.

• International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO)
• Association of Bariatric and Metabolic Surgery
• Turkish Surgical Association
• Turkish Obesity Surgery Society
• National Endoscopic Laparoscopic Surgery Association
• Endocrine Surgery Association
• National Trauma and Emergency Surgery Association

• Laparoscopic Distal Pancreatectomy and Splenectomy in Pancreatic Solid Pseudopapillary Tumor (Video Presentation), Özmen M.M., Moran M., Gündoğdu E., Akgün A.E., Demiriz B., Gelecek S., 10th National Endoscopic Laparoscopic Surgery Congress, 27-30 April 2011, Istanbul, (2011). (Received the Congress Video Presentation Award).

• Anorectal Physiology, 2004
• Experimental Animals Practice and Ethics Course, 2005
• Videoendoscopy Practice Certificate, 2006
• Laparoscopic Surgery Certificate, 2006
• Project Cycle Management Certificate, 2011
• Hospital Based Health Technology Assessment, 2012
• Bariatric Surgery Masterclass, 2012
• The Surgical and Perioperative management of a Bariatric Patient, 2014
• The Internal Society of Stem Cell Application, 2024
• Stanford School of Medicine, Stanford Center of Health Education, Stem Cell Therapeutics, 2025