Octávio Viveiros

ORCID: 0000-0002-2802-0199
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Bariatric Surgery and Outcomes
  • Body Contouring and Surgery
  • COVID-19 and healthcare impacts
  • Gastric Cancer Management and Outcomes
  • Colorectal Cancer Surgical Treatments
  • Gastroesophageal reflux and treatments
  • Diversity and Career in Medicine
  • Cardiac, Anesthesia and Surgical Outcomes
  • Advances in Oncology and Radiotherapy
  • Dental Education, Practice, Research
  • Congenital Diaphragmatic Hernia Studies
  • Climate Change and Health Impacts
  • Global Health Workforce Issues
  • Nutrition and Health in Aging
  • Esophageal and GI Pathology
  • Hernia repair and management
  • Gastrointestinal motility and disorders
  • Diet and metabolism studies
  • Enhanced Recovery After Surgery

Hospital da Luz
2023

Centro Hospitalar de Lisboa Central
2018-2019

Hospital Curry Cabral
2019

Sociedade Portuguesa de Cardiologia
2017

Rishi Singhal Christian Ludwig Gavin Rudge Georgios V. Gkoutos Abd A. Tahrani and 95 more Kamal Mahawar Michał Pędziwiatr Piotr Major Piotr Zarzycki Athanasios Pantelis Dimitris P. Lapatsanis Georgios Stravodimos Chris Matthys Marc Focquet Wouter Vleeschouwers Antonio Spaventa Carlos Zerrweck Antonio Vitiello Giovanna Berardi Mario Musella Alberto Sanchez-Meza Felipe J. Cantu Fernando Mora Marco Cantù Abhishek Katakwar D. Nageshwar Reddy H Elmaleh Mohammad Mahmudul Hassan Abdelrahman Elghandour Mohey Elbanna Ahmed Osman Athar Khan Laurent Layani Nalini Kiran Andrey Velikorechin Maria Solovyeva Hamid Melali Shahab Shahabi Ashish Agrawal Apoorv Shrivastava Ankur Sharma Bhavya Narwaria Mahendra Narwaria Asnat Raziel Nasser Sakran Sergio Susmallian Levent Karagöz Murat Akbaba Salih Zeki Pişkin Ahmet Ziya Balta Zafer Şenol Emilio Manno Michele Iovino Ahmed Osman Mohamed Qassem Sebastián Arana-Garza Heitor P. Póvoas Marcos Leão Vilas-Bôas David N Naumann Jonathan Super Alan Li Basil J. Ammori Hany Balamoun Mohammed Salman Amrit Manik Nasta Ramen Goel Hugo Sánchez-Aguilar Miguel F. Herrera Adel Abou‐Mrad Lucie Cloix Guilherme Silva Mazzini Leonardo Kristem André Lázaro José Luis Campos Joaquín Bernardo Jesús Santos González Carlos Trindade Octávio Viveiros Rui Ribeiro David Goitein David Hazzan Lior Segev Tamar Beck Hernán Reyes Jerónimo Monterrubio Paulina García Marine Benois Radwan Kassir Alessandro Contine Moustafa Elshafei Sueleyman Aktas Sylvia Weiner Till Heidsieck Luis Level Silvia Piñango Patricia Martínez Ortega Rafael Moncada Víctor Valenti Ivan Vlahović Zdenko Boras

Abstract Background There are data on the safety of cancer surgery and efficacy preventive strategies prevention postoperative symptomatic COVID-19 in these patients. But there is little such for any elective surgery. The main objectives this study were to examine bariatric (BS) during coronavirus disease 2019 (COVID-19) pandemic determine perioperative protective rates. Methods We conducted an international cohort all-cause COVID-19-specific 30-day morbidity mortality BS performed between...

10.1007/s11695-021-05493-9 article EN cc-by Obesity Surgery 2021-07-30
Rishi Singhal Victor Roth Cardoso Tom Wiggins Jonathan Super Christian Ludwig and 95 more Georgios V. Gkoutos Kamal Mahawar Michał Pędziwiatr Piotr Major Piotr Zarzycki Athanasios Pantelis Dimitris P. Lapatsanis Georgios Stravodimos Chris Matthys Marc Focquet Wouter Vleeschouwers Antonio Spaventa Carlos Zerrweck Antonio Vitiello Giovanna Berardi Mario Musella Alberto Sanchez-Meza Felipe J. Cantu Fernando de Mora Marco Cantù Abhishek Katakwar D. Nageshwar Reddy H Elmaleh Mohammad Hassan Abdelrahman Elghandour Mohey Elbanna Ahmed Osman Athar Khan Laurent Layani Nalini Kiran Andrey Velikorechin Maria Solovyeva Hamid Melali Shahab Shahabi Ashish Agrawal Apoorv Shrivastava Ankur Sharma Bhavya Narwaria Mahendra Narwaria Asnat Raziel Nasser Sakran Sergio Susmallian Levent Karagöz Murat Akbaba Salih Zeki Pişkin Ahmet Ziya Balta Zafer Şenol Emilio Manno Michele Iovino Ahmed Osman Mohamed Qassem Sebastián Arana-Garza Heitor P. Póvoas Marcos Leão Vilas-Bôas David N Naumann Alan Li Basil J. Ammori Hany Balamoun M Salman Amrit Manik Nasta Ramen Goel Hugo Sánchez-Aguilar Miguel F. Herrera Adel Abou‐Mrad Lucie Cloix Guilherme Silva Mazzini Leonardo Kristem André Lázaro José Luis Campos Joaquín Bernardo Jesús Santos González Carlos Trindade Octávio Viveiros Rui Ribeiro David Goitein David Hazzan Lior Segev Tamar Beck Hernán Reyes Jerónimo Monterrubio Paulina García Marine Benois Radwan Kassir Alessandro Contine Moustafa Elshafei Sueleyman Aktas Sylvia Weiner Till Heidsieck Luis Level Silvia Piñango Patricia Martínez Ortega Rafael Moncada Víctor Valenti Ivan Vlahović Zdenko Boras

Abstract Background There is a paucity of data comparing 30-day morbidity and mortality sleeve gastrectomy (SG), Roux-en-Y gastric bypass (RYGB), one anastomosis (OAGB). This study aimed to compare the safety SG, RYGB, OAGB in propensity score-matched cohorts. Materials methods analysis utilised collected from GENEVA which was multicentre observational cohort bariatric metabolic surgery (BMS) 185 centres across 42 countries between 01/05/2022 31/10/2020 during Coronavirus Disease-2019...

10.1038/s41366-021-01048-1 article EN cc-by International Journal of Obesity 2021-12-15

This study aimed to describe nutritional and lifestyle parameters following one-anastomosis gastric bypass (OAGB). A multicenter among OAGB patients across Israel (n = 277) Portugal 111) was performed. Patients were approached according the time elapsed since surgery. An online survey with information regarding demographics, anthropometrics, aspects administered in both countries simultaneously. Respondents from (pre-surgery age of 41.6 ± 11.0 years, 75.8% females) 45.6 12.3 79.3% reported...

10.3390/nu15061515 article EN Nutrients 2023-03-21
Rishi Singhal Islam Omar Brijesh Madhok Yashasvi Rajeev Yitka Graham and 95 more Abd A. Tahrani Christian Ludwig Tom Wiggins Kamal Mahawar Michał Pędziwiatr Piotr Major Piotr Zarzycki Athanasios Pantelis Dimitris P. Lapatsanis Georgios Stravodimos Chris Matthys Marc Focquet Wouter Vleeschouwers Antonio Spaventa Carlos Zerrweck Antonio Vitiello Giovanna Berardi Mario Musella Alberto Sanchez-Meza Felipe J. Cantu Fernando de Mora Marco Cantù Abhishek Katakwar D. Nageshwar Reddy H Elmaleh Mohammad Hassan Abdelrahman Elghandour Mohey Elbanna Ahmed Osman Athar Khan Laurent Layani Nalini Kiran Andrey Velikorechin Maria Solovyeva Hamid Melali Shahab Shahabi Ashish Agrawal Apoorv Shrivastava Ankur Sharma Bhavya Narwaria Mahendra Narwaria Asnat Raziel Nasser Sakran Sergio Susmallian Levent Karagöz Murat Akbaba Salih Zeki Pişkin Ahmet Ziya Balta Zafer Şenol Emilio Manno Michele Iovino Ahmed Osman Mohamed Qassem Sebastián Arana-Garza Heitor P. Póvoas Marcos Leão Vilas-Bôas Alan Li Basil J. Ammori Hany Balamoun Mohammed Salman Amrit Manik Nasta Ramen Goel Hugo Sánchez-Aguilar Miguel F. Herrera Adel Abou‐Mrad Lucie Cloix Guilherme Silva Mazzini Leonardo Kristem André Lázaro José Luis Campos Joaquín Bernardo Jesús Santos González Carlos Trindade Octávio Viveiros Rui Ribeiro David Goitein David Hazzan Lior Segev Tamar Beck Hernán Reyes Jerónimo Monterrubio Paulina García Marine Benois Radwan Kassir Alessandro Contine Moustafa Elshafei Sueleyman Aktas Sylvia Weiner Till Heidsieck Luis Level Silvia Piñango Patricia Martínez Ortega Rafael Moncada Víctor Valenti Ivan Vlahović

Abstract Background Age ≥ 65 years is regarded as a relative contraindication for bariatric surgery. Advanced age also recognised risk factor adverse outcomes with Coronavirus Disease-2019 (COVID-19) which continues to wreak havoc on global populations. This study aimed assess the safety of surgery (BS) in this particular group during COVID-19 pandemic comparison younger cohort. Methods We conducted prospective international patients who underwent BS between 1/05/2020 and 31/10/2020....

10.1007/s11695-022-06067-z article EN cc-by Obesity Surgery 2022-05-05
Rishi Singhal Islam Omar Brijesh Madhok Christian Ludwig Abd A. Tahrani and 95 more Kamal Mahawar Michał Pędziwiatr Piotr Major Piotr Zarzycki Athanasios Pantelis Dimitris P. Lapatsanis Georgios Stravodimos Chris Matthys Marc Focquet Wouter Vleeschouwers Antonio Spaventa Carlos Zerrweck Antonio Vitiello Giovanna Berardi Mario Musella Alberto Sanchez-Meza Felipe J. Cantu Fernando de Mora Marco Cantù Abhishek Katakwar D. Nageshwar Reddy H Elmaleh Mohammad Mahmudul Hassan Abdelrahman Elghandour Mohey Elbanna Ahmed Osman Athar Khan Laurent Layani Nalini Kiran Andrey Velikorechin Maria Solovyeva Hamid Melali Shahab Shahabi Ashish Agrawal Apoorv Shrivastava Ankur Sharma Bhavya Narwaria Mahendra Narwaria Asnat Raziel Nasser Sakran Sergio Susmallian Levent Karagöz Murat Akbaba Salih Zeki Pişkin Ahmet Ziya Balta Zafer Şenol Emilio Manno Michele Iovino Ahmed Osman Mohamed Qassem Sebastián Arana-Garza Heitor P. Póvoas Marcos Leão Vilas-Bôas Alan Li Basil J. Ammori Hany Balamoun M Salman Amrit Manik Nasta Ramen Goel Hugo Sánchez-Aguilar Miguel F. Herrera Adel Abou‐Mrad Lucie Cloix Guilherme Silva Mazzini Leonardo Kristem André Lázaro José Luis Campos Joaquín Bernardo Jesús Santos González Carlos Alberto Dolezel Trindade Octávio Viveiros Rui Ribeiro David Goitein David Hazzan Lior Segev Tamar Beck Hernán Reyes Jerónimo Monterrubio Paulina García Marine Benois Radwan Kassir Alessandro Contine Moustafa Elshafei Sueleyman Aktas Sylvia Weiner Till Heidsieck Luis Level Silvia Piñango Patricia Martínez Ortega Rafael Moncada Víctor Valenti Ivan Vlahović Zdenko Boras Arnaud Liagre F. De Martini

It has been suggested that patients with a Body Mass Index (BMI) of > 60 kg/m2 should be offered expedited Bariatric Surgery (BS) during the Coronavirus Disease-2019 (COVID-19) pandemic. The main objective this study was to assess safety approach. We conducted global who underwent BS between 1/05/2020 and 31/10/2020. Patients were divided into three groups according their preoperative BMI - Group I (BMI<50 kg/m2), II (BMI 50–60 III (BMI>60 kg/m2). effect on 30-day morbidity mortality,...

10.1016/j.orcp.2022.06.003 article EN cc-by Obesity Research & Clinical Practice 2022-05-01

Abstract Objective One-anastomosis gastric bypass (OAGB) is considered an effective technique in weight reduction and remission of comorbidities. However, common with many bariatric metabolic/bariatric procedures, gastrointestinal side effects are frequently reported, but clinical experience varies. The objective this study was to analyze the bowel function patients who undergo OAGB looking at 5-year postoperative outcomes. Method This cross-sectional, descriptive analytical, developed...

10.1007/s11695-023-06917-4 article EN cc-by Obesity Surgery 2023-11-10

To describe gastrointestinal-related side-effects reported following the One Anastomosis Gastric Bypass (OAGB).A multicenter study among OAGB patients across Israel (n = 277) and Portugal 111) who were recruited to based on time elapsed since surgery was performed. An online survey with information demographics, anthropometrics, medical conditions, gastrointestinal outcomes administered in both countries simultaneously.Respondents from (pre-surgery age of 41.6 ± 11.0 years, 75.8% females)...

10.1080/17474124.2023.2211766 article EN Expert Review of Gastroenterology & Hepatology 2023-05-11
Rishi Singhal Tom Wiggins Sjaak Pouwels Yashasvi Rajeev Brijesh Madhok and 95 more Wasim Hanif Abd A. Tahrani Yitka Graham Christian Ludwig Kamal Mahawar Miguel Lamota Salah M. Raslan Aziz Sümer Surendra Ugale Radwan Kassir Ahmet Ziya Balta Krishnamohan Yarlagadda Marcelo L. Fage Francisco Aguilar Espinosa Aloy J. Mukherjee Pedro R. Martinez Duartez Digvijaysingh Bedi Mehmet Mahir Özmen Mohammad Kermansaravi E Baldini Mahendra Narwaria Osama Mohammed Murshid Abou-Mrad Adel Chirag R. Parikh Christian O. Ramirez-Serrano Francesco Martini Randeep Wadhawan Ronnal Patricio Vargas Francesco Pizza Sergio Carandina Mehmet Kızılkaya Miroslav Ilić Patricio A. Lamoza Tuna Bılecık Marcelo C. Torres César Guevara Jose Eduardo Garcia-Flores Nasser Sakran Sebastián Arana-Garza Manish Khaitan Faruk Karateke Víctor Valenti Nicola Tartaglia Nandakishore Dukkipati Sonja Chiappetta Mario Musella Manuel Carvalho Enrico Pinotti Arun Prasad Kamran Shah Efstratia Baili Syed Imran Abbas Carlo Nagliati Octávio Viveiros Rui Ribeiro Luigi Angrisani Ian Soriano Ahmed Chakib Abbadi Nilton Kawahara P. Raj Ghulam Siddiq Hany Balamoun Carlos Vaz Aparna Govil Bhasker Jacqués Himpens Ajjana Techagumpuch Apoorv Shrivastava Mahidhar Valeti B Bokobza Ahmad Bashir S. Avallone Hugues Sebbag Miguel Angel Escarti Uso Agustin E. Rodriguez Diego Awruch Camilo Ortiz Silva Amador García Ruiz de Gordejuela Chih‐Kun Huang Emilio Manno Elena Ruiz-Úcar José M. Balibrea Steven Paul Marcoen Cüneyt Kırkıl Almantas Maleckas Dang Tuan Pham Eric J. Hazebroek Waleed Al‐Khyatt Tigran Poghosyan Julian W. Mall Rajat Goel Patrick Noe͏̈l Vivek Bindal Durga Prasad Oscar M. Gomez Davila Lilian Kow

The coronavirus disease 2019 (COVID-19) pandemic led to a worldwide suspension of bariatric and metabolic surgery (BMS) services. current study analyses data on patterns service delivery, recovery practices, protective measures taken during the COVID-19 by teams.The is subset analysis GENEVA which was an international cohort between 01/05/2020 31/10/2020. Data were specifically analysed regarding timing BMS suspension, recovery, precautionary deployed.A total 527 surgeons from 439 hospitals...

10.1007/s11695-022-06267-7 article EN cc-by Obesity Surgery 2022-10-25

Petersen's hernia is an internal caused by the herniation of intestinal loops through defect created between transverse mesocolon, retroperitoneum and afferent loop mesentery (Roux, Omega or others) after any type gastrojejunostomy.With growth bariatric metabolic surgery, particularly with laparoscopic approach, there was increase in this kind complication its associated morbidity mortality.The diagnosis challenging can lead to treatment delay devastating consequences.This review aims...

10.15406/aowmc.2019.09.00295 article EN Advances in Obesity Weight Management & Control 2019-12-20
Coming Soon ...