Mario Mendoza-Sagaon

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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)
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)
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)
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/PURPOSE The sudden popularity of the "scooter phenomenon" was followed by an increased rate of injuries associated with its use. This study evaluates the circumstances, types, degrees, and mechanisms of injury related to the use of a scooter in the pediatric population. METHODS From January 2000 to February 2001, the emergency files of all the(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)
PURPOSE The aim of this study is to elucidate the effects of laparoscopic Nissen fundoplication (LNF) with carbon dioxide (CO(2)) or helium (He) on the cell-mediated immune response in a pediatric animal model compared with open Nissen fundoplication (ONF). METHODS Cell immune response was evaluated in 45 1-week-old Sprague Dawley rats using the delayed(More)
Advances in technique and instrumentation have enabled surgeons to perform a growing array of procedures through laparoscopy. However, these efforts have often been compromised by exerting excessive forces during re-traction of the structures necessary for anatomical view. Here, we present a comparative study of human and robotic performance in force(More)
BACKGROUND We designed a prospective controlled animal study to compare the stress response induced after laparoscopic and open cholecystectomy. METHODS Twelve female pigs (20-25 kg body weight) were anesthetized with ketamine, pentobarbital, and fentanyl. The animals were randomized into the following four groups: control (C), pneumoperitoneum with CO(2)(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 of(More)