Ο Κωνσταντίνος Χαλκιάς έχει συμμετάσχει σε 42 δημοσιεύσεις σε διεθνή επιστημονικά περιοδικά με κριτές, ως συγγραφέας, συν-συγγραφέας και ως μέλος συνεργατικών ερευνητικών ομάδων. Το ερευνητικό ενδιαφέρον εστιάζει στη χειρουργική του παχέος εντέρου και του ορθού, την επείγουσα χειρουργική και τα αποτελέσματα των χειρουργικών επεμβάσεων σε μεγάλες πολυκεντρικές μελέτες.
Εργασίες ως συγγραφέας / συν-συγγραφέας
Re-Operative Laparoscopic Colorectal Surgery: A Systematic Review.
Halkias C, Zoikas A, Garoufalia Z, Konstantinidis MK, Ioannidis A, Wexner S.
J Clin Med. 2021 Apr 1;10(7):1447. doi: 10.3390/jcm10071447.
Duodenum-preserving pancreatic resection versus pancreaticoduodenectomy for chronic pancreatitis.
Gurusamy KS, Lusuku C, Halkias C, Davidson BR.
Cochrane Database Syst Rev. 2016 Feb 3;2(2):CD011521. doi: 10.1002/14651858.CD011521.pub2.
Seventy-six-year-old woman with an unusual anatomy of the left ureter.
Demetriou GA, Perera S, Halkias C, Ahmed S.
BMJ Case Rep. 2016 Nov 3;2016:bcr2016217499. doi: 10.1136/bcr-2016-217499.
Axillary lymph node metastases in adenoid cystic carcinoma of the breast. A rare finding.
Spiliopoulos D, Mitsopoulos G, Kaptanis S, Halkias C.
G Chir. 2015 Sep-Oct;36(5):209-13. doi: 10.11138/gchir/2015.36.5.209.
Late Development of a Bronchocutaneous Fistula due to an Epicardial Cardioverter-Defibrillator Lead.
Patris V, Argiriou O, Lama N, Georgiou H, Halkias C, Charitos C.
J Tehran Heart Cent. 2015 Apr 3;10(2):106-8.
Synchronous metastatic omental melanoma and colonic adenocarcinoma: a case report.
Halkias C, Sloane J, Ben-Gashir M, Bashir G.
BMC Res Notes. 2015 Apr 3;8:125. doi: 10.1186/s13104-015-1099-7.
Temporal artery biopsy size does not matter.
Kaptanis S, Perera JK, Halkias C, Caton N, Alarcon L, Vig S.
Vascular. 2014 Dec;22(6):406-10. doi: 10.1177/1708538113516322. Epub 2013 Dec 17.
Πολυκεντρικές μελέτες με συμμετοχή ως συνεργάτης (collaborator)
A prognostic model for use before elective surgery to estimate the risk of postoperative pulmonary complications (GSU-Pulmonary Score): a development and validation study in three international cohorts.
NIHR Global Health Research Unit on Global Surgery; STARSurg Collaborative.
Lancet Digit Health. 2024 Jul;6(7):e507-e519. doi: 10.1016/S2589-7500(24)00065-7.
Correction: The Cholecystectomy As A Day Case (CAAD) Score: A Validated Score of Preoperative Predictors of Successful Day-Case Cholecystectomy Using the CholeS Data Set.
El-Sharkawy AM, Tewari N, Vohra RS; CholeS Study Group, West Midlands Research Collaborative.
World J Surg. 2023 Apr;47(4):1082. doi: 10.1007/s00268-023-06911-y.
Elective surgery system strengthening: development, measurement, and validation of the surgical preparedness index across 1632 hospitals in 119 countries.
NIHR Global Health Unit on Global Surgery; COVIDSurg Collaborative.
Lancet. 2022 Nov 5;400(10363):1607-1617. doi: 10.1016/S0140-6736(22)01846-3. Epub 2022 Oct 31. PMID: 36328042 Free PMC article.
The impact of surgical delay on resectability of colorectal cancer: An international prospective cohort study.
COVIDSurg Collaborative.
Colorectal Dis. 2022 Mar 14;24(6):708-26. doi: 10.1111/codi.16117. Online ahead of print.
COVID-19-related absence among surgeons: development of an international surgical workforce prediction model.
COVIDSurg Collaborative.
BJS Open. 2021 Mar 5;5(2):zraa021. doi: 10.1093/bjsopen/zraa021.
Death following pulmonary complications of surgery before and during the SARS-CoV-2 pandemic.
STARSurg Collaborative and COVIDSurg Collaborative.
Br J Surg. 2021 Dec 1;108(12):1448-1464. doi: 10.1093/bjs/znab336.
Effect of COVID-19 pandemic lockdowns on planned cancer surgery for 15 tumour types in 61 countries: an international, prospective, cohort study.
COVIDSurg Collaborative.
Lancet Oncol. 2021 Nov;22(11):1507-1517. doi: 10.1016/S1470-2045(21)00493-9. Epub 2021 Oct 5.
Elective Cancer Surgery in COVID-19-Free Surgical Pathways During the SARS-CoV-2 Pandemic: An International, Multicenter, Comparative Cohort Study.
Glasbey JC, Nepogodiev D, Simoes JFF, Omar O, Li E, Venn ML, Pgdme, Abou Chaar MK, Capizzi V, Chaudhry D, Desai A, Edwards JG, Evans JP, Fiore M, Videria JF, Ford SJ, Ganly I, Griffiths EA, Gujjuri RR, Kolias AG, Kaafarani HMA, Minaya-Bravo A, McKay SC, Mohan HM, Roberts KJ, San Miguel-Méndez C, Pockney P, Shaw R, Smart NJ, Stewart GD, Sundar Mrcog S, Vidya R, Bhangu AA; COVIDSurg Collaborative.
J Clin Oncol. 2021 Jan 1;39(1):66-78. doi: 10.1200/JCO.20.01933. Epub 2020 Oct 6.
Factors impacting time to ileostomy closure after anterior resection: the UK closure of ileostomy timing cohort study (CLOSE-IT).
Dukes’ Club Research Collaborative.
Colorectal Dis. 2021 May;23(5):1109-1119. doi: 10.1111/codi.15531. Epub 2021 Feb 18.
Global wealth disparities drive adherence to COVID-safe pathways in head and neck cancer surgery.
COVIDSurg Collaborative.
BJS Open. 2021 Nov 9;5(6):zrab112. doi: 10.1093/bjsopen/zrab112.
Head and neck cancer surgery during the COVID-19 pandemic: An international, multicenter, observational cohort study.
COVIDSurg Collaborative.
Cancer. 2021 Jul 15;127(14):2476-2488. doi: 10.1002/cncr.33320. Epub 2020 Dec 21.
Machine learning risk prediction of mortality for patients undergoing surgery with perioperative SARS-CoV-2: the COVIDSurg mortality score.
COVIDSurg Collaborative.
Br J Surg. 2021 Nov 11;108(11):1274-1292. doi: 10.1093/bjs/znab183.
Outcomes after perioperative SARS-CoV-2 infection in patients with proximal femoral fractures: an international cohort study.
COVIDSurg Collaborative.
BMJ Open. 2021 Nov 30;11(11):e050830. doi: 10.1136/bmjopen-2021-050830.
Preoperative nasopharyngeal swab testing and postoperative pulmonary complications in patients undergoing elective surgery during the SARS-CoV-2 pandemic.
COVIDSurg Collaborative.
Br J Surg. 2021 Jan 27;108(1):88-96. doi: 10.1093/bjs/znaa051.
Appendicitis risk prediction models in children presenting with right iliac fossa pain (RIFT study): a prospective, multicentre validation study.
RIFT Study Group on behalf of the West Midlands Research Collaborative.
Lancet Child Adolesc Health. 2020 Apr;4(4):271-280. doi: 10.1016/S2352-4642(20)30006-7. Epub 2020 Feb 13.
Delaying surgery for patients with a previous SARS-CoV-2 infection.
COVIDSurg Collaborative.
Br J Surg. 2020 Nov;107(12):e601-e602. doi: 10.1002/bjs.12050. Epub 2020 Sep 25.
Elective surgery cancellations due to the COVID-19 pandemic: global predictive modelling to inform surgical recovery plans.
COVIDSurg Collaborative.
Br J Surg. 2020 Oct;107(11):1440-1449. doi: 10.1002/bjs.11746. Epub 2020 Jun 13.
Evaluation of appendicitis risk prediction models in adults with suspected appendicitis.
Bhangu A; RIFT Study Group on behalf of the West Midlands Research Collaborative.
Br J Surg. 2020 Jan;107(1):73-86. doi: 10.1002/bjs.11440. Epub 2019 Dec 3.
Global guidance for surgical care during the COVID-19 pandemic.
COVIDSurg Collaborative.
Br J Surg. 2020 Aug;107(9):1097-1103. doi: 10.1002/bjs.11646. Epub 2020 Apr 15.
Mortality and pulmonary complications in patients undergoing surgery with perioperative SARS-CoV-2 infection: an international cohort study.
COVIDSurg Collaborative.
Lancet. 2020 Jul 4;396(10243):27-38. doi: 10.1016/S0140-6736(20)31182-X. Epub 2020 May 29.
Outcomes from elective colorectal cancer surgery during the SARS-CoV-2 pandemic.
COVIDSurg Collaborative.
Colorectal Dis. 2020 Nov 15;23(3):732-49. doi: 10.1111/codi.15431. Online ahead of print.
Outcomes of obstructed abdominal wall hernia: results from the UK national small bowel obstruction audit.
National Audit of Small Bowel Obstruction Steering Group and National Audit of Small Bowel Obstruction Collaborators; NASBO Steering Group; NASBO Collaborators; West Midlands Research Collaborative.
BJS Open. 2020 Oct;4(5):924-934. doi: 10.1002/bjs5.50315. Epub 2020 Jul 10.
Predicting the difficult laparoscopic cholecystectomy: development and validation of a pre-operative risk score using an objective operative difficulty grading system.
Nassar AHM, Hodson J, Ng HJ, Vohra RS, Katbeh T, Zino S, Griffiths EA; CholeS Study Group, West Midlands Research Collaborative.
Surg Endosc. 2020 Oct;34(10):4549-4561. doi: 10.1007/s00464-019-07244-5. Epub 2019 Nov 15. PMID: 31732855
Correction to: Utilisation of an operative difficulty grading scale for laparoscopic cholecystectomy.
Griffiths EA, Hodson J, Vohra RS, Marriott P, Katbeh T, Zino S, Nassar AHM; CholeS Study Group, West Midlands Research Collaborative.
Surg Endosc. 2019 Jan;33(1):122-125. doi: 10.1007/s00464-018-6377-8.
Malnutrition, nutritional interventions and clinical outcomes of patients with acute small bowel obstruction: results from a national, multicentre, prospective audit.
Lee MJ, Sayers AE, Drake TM, Singh P, Bradburn M, Wilson TR, Murugananthan A, Walsh CJ, Fearnhead NS; NASBO Steering Group and NASBO Collaborators.
BMJ Open. 2019 Jul 27;9(7):e029235. doi: 10.1136/bmjopen-2019-029235.
National prospective cohort study of the burden of acute small bowel obstruction.
Lee MJ, Sayers AE, Drake TM, Marriott PJ, Anderson ID, Bach SP, Bradburn M, Hind D, Verjee A, Fearnhead NS; NASBO steering group and NASBO collaborators.
BJS Open. 2019 Feb 22;3(3):354-366. doi: 10.1002/bjs5.50136. eCollection 2019 Jun.
Outcomes following small bowel obstruction due to malignancy in the national audit of small bowel obstruction.
National Audit of Small Bowel Obstruction Steering Group & National Audit of Small Bowel Obstruction Collaborators.
Eur J Surg Oncol. 2019 Dec;45(12):2319-2324. doi: 10.1016/j.ejso.2019.07.014. Epub 2019 Jul 9.
The Cholecystectomy As A Day Case (CAAD) Score: A Validated Score of Preoperative Predictors of Successful Day-Case Cholecystectomy Using the CholeS Data Set.
El-Sharkawy AM, Tewari N, Vohra RS; CholeS Study Group, West Midlands Research Collaborative.
World J Surg. 2019 Aug;43(8):1928-1934. doi: 10.1007/s00268-019-04981-5.
The development and validation of a scoring tool to predict the operative duration of elective laparoscopic cholecystectomy.
Bharamgoudar R, Sonsale A, Hodson J, Griffiths E; CholeS Study Group, West Midlands Research Collaborative.
Surg Endosc. 2018 Jul;32(7):3149-3157. doi: 10.1007/s00464-018-6030-6. Epub 2018 Jan 16.
Cost-effectiveness of emergency versus delayed laparoscopic cholecystectomy for acute gallbladder pathology.
Sutton AJ, Vohra RS, Hollyman M, Marriott PJ, Buja A, Alderson D, Pasquali S, Griffiths EA; CholeS Study Group and the West Midlands Research Collaborative.
Br J Surg. 2017 Jan;104(1):98-107. doi: 10.1002/bjs.10317. Epub 2016 Oct 20.
Multicentre observational study of adherence to Sepsis Six guidelines in emergency general surgery.
UK National Surgical Research Collaborative.
Br J Surg. 2017 Jan;104(2):e165-e171. doi: 10.1002/bjs.10432.
Students' participation in collaborative research should be recognised.
STARSurg Collaborative. Electronic address: http://www.starsurg.org/ ; STARSurg Collaborative.
Int J Surg. 2017 Mar;39:234-237. doi: 10.1016/j.ijsu.2017.01.114. Epub 2017 Feb 4.
Population-based cohort study of outcomes following cholecystectomy for benign gallbladder diseases.
CholeS Study Group, West Midlands Research Collaborative.
Br J Surg. 2016 Nov;103(12):1704-1715. doi: 10.1002/bjs.10287. Epub 2016 Aug 26.
Population-based cohort study of variation in the use of emergency cholecystectomy for benign gallbladder diseases.
CholeS Study Group, West Midlands Research Collaborative.
Br J Surg. 2016 Nov;103(12):1716-1726. doi: 10.1002/bjs.10288. Epub 2016 Oct 17.
Preoperative risk factors for conversion from laparoscopic to open cholecystectomy: a validated risk score derived from a prospective U.K. database of 8820 patients.
Sutcliffe RP, Hollyman M, Hodson J, Bonney G, Vohra RS, Griffiths EA; CholeS study group, West Midlands Research Collaborative.
HPB (Oxford). 2016 Nov;18(11):922-928. doi: 10.1016/j.hpb.2016.07.015. Epub 2016 Aug 31.