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Papers by Sergio Diaz

DOAJ (DOAJ: Directory of Open Access Journals), Nov 1, 2021

Revista Colombiana De Cirugia, Dec 1, 2012

The first laparoscopic hepatic anatomical resection was reported by J.J. Azagra in 1994, who perf... more The first laparoscopic hepatic anatomical resection was reported by J.J. Azagra in 1994, who performed a left lateral segmentectomy in a patient with a symptomatic adenoma1. An increasing number of anatomical resections, both segmentectomies and hemihepatectomies in the management of benign and malignant entities have been reported since then. The aim of this report is to review the surgical technique of the laparoscopic left hepatic segmentectomy as a minimally invasive option in a patient with left intrahepatic lithiasis.

European Journal of Surgical Oncology

Revista Colombiana De Cirugia, Dec 1, 2012

CES Medicina, 2010

... SERGIO DIAZ 1 , DIEGO PENAGOS 2 , GONZALO GOMÉZ 2 , MARÍA CRISTINA GARCÍA 2 , MARÍA CLARA ARR... more ... SERGIO DIAZ 1 , DIEGO PENAGOS 2 , GONZALO GOMÉZ 2 , MARÍA CRISTINA GARCÍA 2 , MARÍA CLARA ARROYAVE 2 , ROGELIO MATALLANA 1 , FELIPE VANEGAS 1 1 Cirujano ... 8. de Castro SM, Singhal D, Aronson DC, Busch OR, van Gulik TM, Obertop H, Gouma DJ. ...

Surgical Endoscopy, 2009

... us the increased play between the instruments, needed for free movement to finish ... surgery... more ... us the increased play between the instruments, needed for free movement to finish ... surgery with speed, dexterity, and tissue handling capabilities comparable to standard laparoscopic instruments. ... robot with vision and lighting capabilities and a remote control surgeon console. ...

Revista CES …, 2010

SERGIO DIAZ1, DIEGO PENAGOS2, GONZALO GÓMEZ2, MARÍA CRISTINA GARCÍA2, MARÍA CLARA ARROYAVE2, ROGE... more SERGIO DIAZ1, DIEGO PENAGOS2, GONZALO GÓMEZ2, MARÍA CRISTINA GARCÍA2, MARÍA CLARA ARROYAVE2, ROGELIO MATALLANA1, FELIPE VANEGAS1 Forma de citar: Diaz S, Penagos D, Gómez G. García MC, Arroyave MC, Matallana R, Vanegas F. Tumor ...

Revista Colombiana De Cirugia, 2012

Surgical Endoscopy and Other Interventional Techniques, Oct 9, 2006

Background: The use of prosthetic materials for the repair of paraesophageal hiatal hernia (PEH) ... more Background: The use of prosthetic materials for the repair of paraesophageal hiatal hernia (PEH) may lead to esophageal stricture and perforation. High recurrence rates after primary repair have led surgeons to explore other options, including various bioprostheses. However, the long-term effects of these newer materials when placed at the esophageal hiatus are unknown. This study assessed the anatomic and histologic characteristics 1 year after PEH repair using a U-shaped configuration of commercially available small intestinal submucosa (SIS) mesh in a canine model. Methods: Six dogs underwent laparoscopic PEH repair with SIS mesh 4 weeks after thoracoscopic creation of PEH. When the six dogs were sacrificed 12 months later, endoscopy and barium x-ray were performed, and biopsies of the esophagus and crura were obtained. Results: The mean weight of the dogs 1 year after surgery was identical to their entry weight. No dog had gross dysphagia, evidence of esophageal stricture, or reherniation. At sacrifice, the biomaterial was not identifiable grossly. Biopsies of the hiatal region showed fibrosis as well as muscle fiber proliferation and regeneration. No dog had erosion of the mesh into the esophagus. Conclusions: This reproducible canine model of PEH formation and repair did not result in erosion of SIS mesh into the esophagus or in stricture formation. Native muscle ingrowth was noted 1 year after placement of the biomaterial. According to the findings, SIS may provide a scaffold for ingrowth of crural muscle and a durable repair of PEH over the long term.

Revista Colombiana De Cirugia, Sep 1, 2008

Journal of Gastrointestinal Surgery, 2003

Laparoscopic paraesophageal hernia repairs performed in 116 patients between 1992 and 2001 were p... more Laparoscopic paraesophageal hernia repairs performed in 116 patients between 1992 and 2001 were prospectively analyzed. Perioperative outcomes were assessed and follow-up was performed under protocol. There were 85 female and 31 male patients who had a mean (+/- SD) age of 65 +/- 13 years and an American Society of Anesthesiology score of 2.3 +/- 0.6. All but two patients underwent an antireflux procedure. Gastropexy was performed in 48 patients, an esophageal lengthening procedure in six patients, and prosthetic closure of the hiatus in six patients. Major complications occurred in five patients (4.3%) with two postoperative deaths (1.7%). Mean follow-up was 30 +/- 25 months; 96 patients (83%) have been followed for more than 6 months. Among these patients, 73 (76%) are asymptomatic, 11 (11%) have mild symptoms, and 12 (13%) take antacid medications. Protocol barium esophagograms were obtained in 69% of patients at 6 to 12 months' follow-up. Recurrence of hiatal hernia was documented in 21 patients (22% overall and in 32% of those undergoing contrast studies). Reoperation has been performed in three patients (3%). When only the patients with recurrent hiatal hernias are considered, 13 (62%) are symptomatic but only six (28%) require medication for symptoms. Laparoscopic paraesophageal hernia repair is generally safe, even in this high-risk group. This study confirms a relatively high incidence of recurrent hiatal abnormalities after paraesophageal hernia repair; however, most recurrent hiatal hernias are small and only 3% have required reoperation. Protocol esophagograms detect recurrences that are minimally symptomatic. Improved techniques must be devised to improve the long-term outcomes of laparoscopic paraesophageal hernia repair.

Journal of vascular surgery : official publication, the Society for Vascular Surgery [and] International Society for Cardiovascular Surgery, North American Chapter, 2004

The purpose of this study was to develop a reliable in vivo porcine model of type II endoleak res... more The purpose of this study was to develop a reliable in vivo porcine model of type II endoleak resulting from endovascular aortic aneurysm repair (EVAR), for the study and treatment of type II endoleak.

The first laparoscopic hepatic anatomical resection was reported by J.J. Azagra in 1994, who perf... more The first laparoscopic hepatic anatomical resection was reported by J.J. Azagra in 1994, who performed a left lateral segmentectomy in a patient with a symptomatic adenoma 1. An increasing number of anatomical resections, both segmentectomies and hemihepatectomies in the management of benign and malignant entities have been reported since then. The aim of this report is to review the surgical technique of the laparoscopic left hepatic segmentectomy as a minimally invasive option in a patient with left intrahepatic lithiasis.

DOAJ (DOAJ: Directory of Open Access Journals), Nov 1, 2021

Revista Colombiana De Cirugia, Dec 1, 2012

The first laparoscopic hepatic anatomical resection was reported by J.J. Azagra in 1994, who perf... more The first laparoscopic hepatic anatomical resection was reported by J.J. Azagra in 1994, who performed a left lateral segmentectomy in a patient with a symptomatic adenoma1. An increasing number of anatomical resections, both segmentectomies and hemihepatectomies in the management of benign and malignant entities have been reported since then. The aim of this report is to review the surgical technique of the laparoscopic left hepatic segmentectomy as a minimally invasive option in a patient with left intrahepatic lithiasis.

European Journal of Surgical Oncology

Revista Colombiana De Cirugia, Dec 1, 2012

CES Medicina, 2010

... SERGIO DIAZ 1 , DIEGO PENAGOS 2 , GONZALO GOMÉZ 2 , MARÍA CRISTINA GARCÍA 2 , MARÍA CLARA ARR... more ... SERGIO DIAZ 1 , DIEGO PENAGOS 2 , GONZALO GOMÉZ 2 , MARÍA CRISTINA GARCÍA 2 , MARÍA CLARA ARROYAVE 2 , ROGELIO MATALLANA 1 , FELIPE VANEGAS 1 1 Cirujano ... 8. de Castro SM, Singhal D, Aronson DC, Busch OR, van Gulik TM, Obertop H, Gouma DJ. ...

Surgical Endoscopy, 2009

... us the increased play between the instruments, needed for free movement to finish ... surgery... more ... us the increased play between the instruments, needed for free movement to finish ... surgery with speed, dexterity, and tissue handling capabilities comparable to standard laparoscopic instruments. ... robot with vision and lighting capabilities and a remote control surgeon console. ...

Revista CES …, 2010

SERGIO DIAZ1, DIEGO PENAGOS2, GONZALO GÓMEZ2, MARÍA CRISTINA GARCÍA2, MARÍA CLARA ARROYAVE2, ROGE... more SERGIO DIAZ1, DIEGO PENAGOS2, GONZALO GÓMEZ2, MARÍA CRISTINA GARCÍA2, MARÍA CLARA ARROYAVE2, ROGELIO MATALLANA1, FELIPE VANEGAS1 Forma de citar: Diaz S, Penagos D, Gómez G. García MC, Arroyave MC, Matallana R, Vanegas F. Tumor ...

Revista Colombiana De Cirugia, 2012

Surgical Endoscopy and Other Interventional Techniques, Oct 9, 2006

Background: The use of prosthetic materials for the repair of paraesophageal hiatal hernia (PEH) ... more Background: The use of prosthetic materials for the repair of paraesophageal hiatal hernia (PEH) may lead to esophageal stricture and perforation. High recurrence rates after primary repair have led surgeons to explore other options, including various bioprostheses. However, the long-term effects of these newer materials when placed at the esophageal hiatus are unknown. This study assessed the anatomic and histologic characteristics 1 year after PEH repair using a U-shaped configuration of commercially available small intestinal submucosa (SIS) mesh in a canine model. Methods: Six dogs underwent laparoscopic PEH repair with SIS mesh 4 weeks after thoracoscopic creation of PEH. When the six dogs were sacrificed 12 months later, endoscopy and barium x-ray were performed, and biopsies of the esophagus and crura were obtained. Results: The mean weight of the dogs 1 year after surgery was identical to their entry weight. No dog had gross dysphagia, evidence of esophageal stricture, or reherniation. At sacrifice, the biomaterial was not identifiable grossly. Biopsies of the hiatal region showed fibrosis as well as muscle fiber proliferation and regeneration. No dog had erosion of the mesh into the esophagus. Conclusions: This reproducible canine model of PEH formation and repair did not result in erosion of SIS mesh into the esophagus or in stricture formation. Native muscle ingrowth was noted 1 year after placement of the biomaterial. According to the findings, SIS may provide a scaffold for ingrowth of crural muscle and a durable repair of PEH over the long term.

Revista Colombiana De Cirugia, Sep 1, 2008

Journal of Gastrointestinal Surgery, 2003

Laparoscopic paraesophageal hernia repairs performed in 116 patients between 1992 and 2001 were p... more Laparoscopic paraesophageal hernia repairs performed in 116 patients between 1992 and 2001 were prospectively analyzed. Perioperative outcomes were assessed and follow-up was performed under protocol. There were 85 female and 31 male patients who had a mean (+/- SD) age of 65 +/- 13 years and an American Society of Anesthesiology score of 2.3 +/- 0.6. All but two patients underwent an antireflux procedure. Gastropexy was performed in 48 patients, an esophageal lengthening procedure in six patients, and prosthetic closure of the hiatus in six patients. Major complications occurred in five patients (4.3%) with two postoperative deaths (1.7%). Mean follow-up was 30 +/- 25 months; 96 patients (83%) have been followed for more than 6 months. Among these patients, 73 (76%) are asymptomatic, 11 (11%) have mild symptoms, and 12 (13%) take antacid medications. Protocol barium esophagograms were obtained in 69% of patients at 6 to 12 months' follow-up. Recurrence of hiatal hernia was documented in 21 patients (22% overall and in 32% of those undergoing contrast studies). Reoperation has been performed in three patients (3%). When only the patients with recurrent hiatal hernias are considered, 13 (62%) are symptomatic but only six (28%) require medication for symptoms. Laparoscopic paraesophageal hernia repair is generally safe, even in this high-risk group. This study confirms a relatively high incidence of recurrent hiatal abnormalities after paraesophageal hernia repair; however, most recurrent hiatal hernias are small and only 3% have required reoperation. Protocol esophagograms detect recurrences that are minimally symptomatic. Improved techniques must be devised to improve the long-term outcomes of laparoscopic paraesophageal hernia repair.

Journal of vascular surgery : official publication, the Society for Vascular Surgery [and] International Society for Cardiovascular Surgery, North American Chapter, 2004

The purpose of this study was to develop a reliable in vivo porcine model of type II endoleak res... more The purpose of this study was to develop a reliable in vivo porcine model of type II endoleak resulting from endovascular aortic aneurysm repair (EVAR), for the study and treatment of type II endoleak.

The first laparoscopic hepatic anatomical resection was reported by J.J. Azagra in 1994, who perf... more The first laparoscopic hepatic anatomical resection was reported by J.J. Azagra in 1994, who performed a left lateral segmentectomy in a patient with a symptomatic adenoma 1. An increasing number of anatomical resections, both segmentectomies and hemihepatectomies in the management of benign and malignant entities have been reported since then. The aim of this report is to review the surgical technique of the laparoscopic left hepatic segmentectomy as a minimally invasive option in a patient with left intrahepatic lithiasis.