Mario Mendoza-Sagaon

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BACKGROUND As general surgeons perform a growing number of laparoscopic operations in increasingly specialized environments, the ability to obtain expert advice during procedures becomes more important. Technological advances in video and computer communications are enabling surgeons to procure expertise quickly and efficiently. In this article, we present(More)
BACKGROUND This study compares the effects of carbon dioxide pneumoperitoneum versus laparotomy on cellular-mediated immune response in a murine model. METHODS Sixty-eight female C3H/He mice were sensitized to keyhole limpet hemocyanin (KLH) and to a mouse mammary carcinoma cell line (MC2) before surgery. Animals were randomized into 4 groups: group I,(More)
PURPOSE The aim of the study was to review the records of all children who presented with gastric volvulus in the past 10 years. METHODS The study group consisted of 21 children with an age range from 0.2 months to 4.3 years who were operated for gastric volvulus from 1992 to 2003. RESULTS Initial symptoms included acute abdominal pain after meals,(More)
BACKGROUND Hypercapnia and local pressure effects unique to CO(2) base minimally invasive surgery alter renal blood flow. We have demonstrated laparoscopic antireflux surgery to have an additional impact upon hemodynamics (decreased cardiac output), potentially extending known effects upon renal blood flow. METHODS We measured renal blood flow with(More)
OBJECTIVE To analyze the effect of CO2 pneumoperitoneum on the inflammatory response induced by sepsis during laparoscopy. SUMMARY BACKGROUND DATA A growing body of evidence challenges the once generally accepted notion that smaller incisions alone account for the observed benefits of the laparoscopic approach. Furthermore, laparoscopic surgery is now(More)
Background: Advances in technique and instrumentation have enabled surgeons to perform an increasing number of complicated procedures through laparoscopy. However, these efforts have often been compromised by the exertion of excessive force when anatomical structures are retracted to create a clear view of the anatomy. Here, we present a comparative study(More)
We tested the hypothesis that the pancreas can be safely divided laparoscopically using non-suture devices. Twelve pigs were randomized into 4 groups: 1) laparoscopic distal pancreatectomy (LDP) using an ultrasonic scalpel; 2) LDP using an ultrasonic scalpel with pancreatic stump suture reinforcement; 3) LDP using a 35-mm laparoscopic linear vascular(More)
PURPOSE The purpose of this study is to delineate the effect of different operative procedures on the cell-mediated immune response in a pediatric animal model using the delayed type hypersensitivity (DTH) skin test. METHODS Sprague Dawley rats (1 week old) were sensitized against keyhole limpet hemocyanin (KLH). Animals were challenged 2 weeks later by(More)
The purpose of this study was to assess the usefulness of a cauterizing laparoscopic linear stapler for intestinal anastomosis. In a porcine model, intestinal anastomoses performed with a standard laparoscopic linear stapler, a cauterizing laparoscopic linear stapler (RF stapler), and a two-layer, hand-sewn technique were compared by measuring bursting(More)
BACKGROUND Laparoscopic Nissen fundoplication (LNF) is gaining popularity. Although the hemodynamic effects of the typical pneumoperitoneum have been studied, the additional consequences of the hiatal dissection necessary for LNF have not. METHODS Seven female pigs were anesthetized, intubated, and ventilated with a volume ventilator and hemodynamic and(More)