Browsing by Author "Guzman, Sergio"

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    Antecolic versus retrocolic alimentary limb in laparoscopic Roux-en-Y gastric bypass: a comparative study
    (2007) Escalona, Alex; Devaud, Nicolas; Perez, Gustavo; Crovari, Fernando; Boza, Carnilo; Viviani, Paola; Ibanez, Luis; Guzman, Sergio
    Background: Laparoscopic Roux-en-Y gastric bypass (LRYGB) has become the most common surgical treatment for morbid obesity. Intestinal obstruction and internal hernias are cornplications more commonly observed after LRYGB than after open RYGB. The aim of this study was to evaluate the incidence of these cornplications in patients who had undergone LRYGB using an antecolic versus a retrocolic technique.
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    Disección submucosa endoscópica en cáncer gástrico incipiente : experiencia inicial en el Hospital Clínico de la Pontificia Universidad Católica de Chile
    (2015) Donoso D., Andrés; Sharp Pittet, Allan Carlos; Parra Blanco, Adolfo; Roa Strauch, Juan Carlos Enrique; Bachler, Jean Phillipe; Crovari Eulufi, Fernando; Funke, Ricardo; Pimentel Muller, Fernando; Ibáñez Anrique, Luis; Guzmán Karadima, Sergio; Donoso D., Andrés; Sharp P. Allan; Parra Blanco, Adolfo; Roa Strauch, Juan Carlos Enrique; Bachler, Jean Phillipe; Crovari Eulufi, Fernando; Funke, Ricardo; Pimentel Muller, Fernando; Ibáñez Anrique, Luis; Guzman, Sergio
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    Importance of Routine Preoperative Upper GI Endoscopy: Why All Patients Should Be Evaluated?
    (2009) Munoz, Rodrigo; Ibanez, Luis; Salinas, Jose; Escalona, Alex; Perez, Gustavo; Pimentel, Fernando; Guzman, Sergio; Boza, Camilo
    Morbid obesity is associated with different gastrointestinal alterations and diseases. Surgically induced weight loss has become the best treatment for morbidly obese patients. Roux-en-Y gastric bypass is the most common procedure performed worldwide. Concerns regarding difficulties in further evaluation of stomach remnant for early detection of gastric cancer, however, have emphasized the routine use of preoperative upper endoscopy, even in asymptomatic patients, to detect upper gastrointestinal abnormalities. The main outcome of this study was to identify the most common preoperative endoscopic findings.
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    Laparoscopic Pyelolithotomy: Optimizing Surgical Technique
    (MARY ANN LIEBERT INC, 2009) Salvado, Jose A.; Guzman, Sergio; Trucco, Cristian A.; Parra, Claudio A.
    The classic approach to renal stone disease includes shockwave lithotripsy, ureteroscopy or percutaneous nephrolithotripsy, and, in some cases, a combination of both. The usefulness of laparoscopy in this regard remains debated. In this report and video, we present our technique of laparoscopic pyelolithotomy assisted by flexible instrumentation to achieve maximal stone clearance in a selected group of patients.
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    Safety and Efficacy of Roux-en-Y Gastric Bypass to Treat Type 2 Diabetes Mellitus in Non-severely Obese Patients
    (2011) Boza, Camilo; Munoz, Rodrigo; Salinas, Jose; Gamboa, Cristian; Klaassen, Julieta; Escalona, Alex; Perez, Gustavo; Ibanez, Luis; Guzman, Sergio
    The efficacy of Roux-en-Y gastric bypass (RYGB) to control type 2 diabetes mellitus (T2DM) has been demonstrated in morbidly obese patients. Surgical procedures primarily focused on T2DM control in patients with body mass index (BMI) < 35 kg/m(2) have shown to effectively induce remission of T2DM. However, only few reports have evaluated the safety and efficacy of RYGB in this group of patients. The aim of this study is to assess the safety and efficacy of RYGB in TD2M patients with BMI < 35 kg/m(2). All T2DM patients with BMI < 35 kg/m(2) and at least 12 months of follow-up who underwent laparoscopic RYGB were included. Safety of the procedure was evaluated according to mortality, need of reoperation/conversion, and complication rates. Metabolic parameters were evaluated at baseline and 6, 12, and 24 months after surgery. Thirty patients were included. Seventeen (56.6%) were women. Age, BMI, and duration of diabetes were 48 +/- 9 years, 33.7 +/- 1.2 kg/m(2), 4 +/- 2.9 years, respectively. No mortality was observed. No conversion/reoperation was needed. Average length of stay was 3.2 +/- 0.9 days. Early and late postoperative complications were observed in five (16.6%) and five (16.6%) patients, respectively. Twelve months after surgery, remission was observed in 25 of 30 patients (83.3%). After 2 years, remission was achieved in 13 of 20 patients (65%), and hemoglobin A1c decreased from 8.1 +/- 1.8% to 5.9 +/- 1.1% and homeostasis model assessment of insulin resistance from 5.7 +/- 3.2 to 1.9 +/- 0.8 after 12 months. RYGB is a safe and effective procedure to induce T2DM remission in otherwise not eligible patients for bariatric surgery. Evidence from prospective studies is needed to validate this approach.
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    Weight Loss and Metabolic Improvement in Morbidly Obese Subjects Implanted for 1 Year With an Endoscopic Duodenal-Jejunal Bypass Liner
    (LIPPINCOTT WILLIAMS & WILKINS, 2012) Escalona, Alex; Pimentel, Fernando; Sharp, Allan; Becerra, Pablo; Slako, Milenko; Turiel, Dannae; Munoz, Rodrigo; Bambs, Claudia; Guzman, Sergio; Ibanez, Luis; Gersin, Keith
    Objective: To evaluate safety, weight loss, and cardiometabolic changes in obese subjects implanted with the duodenal-jejunal bypass liner (DJBL) for 1 year.