Radiologic assessment of gastric emptying of water-soluble contrast media: New data security from a longitudinal study. / Evaluación radiológica del vaciamiento gástrico de medio de contraste hidrosoluble: nuevos datos de seguridad de un estudio longitudinal.

BACKGROUND AND OBJECTIVES: Practice guidelines for preoperative fasting have not clearly established the fasting time needed after oral administration of water-soluble contrast media. The aim of this study was to determine the time required for the gastric emptying during the water-soluble contrast media in patients with acute abdominal pain. METHODS: This prospective longitudinal study included sixty-eight patients older than 18 years of age with acute abdominal pain, who required a water-soluble contrast media enhanced abdominal computed tomography study. Plain radiographs were obtained hourly until complete the gastric emptying. Patients with probable bowel obstruction were not included in the study. RESULTS: A total of 31 (45,6%), 54 (79,4%), and 64 (94,1%) patients achieved a complete gastric clearance of barium in 1, 2 and 3 hours, respectively. All patients achieved complete emptying of water-soluble contrast media within 6 hours. Gastric emptying time was not associated with gender (P=0,44), body mass index (P=.35), fasting time prior to water-soluble contrast media intake (P=0,12), administration of opioids in the emergency room (P=0,7), and the presence of comorbidities (P=0,36). CONCLUSION: Ninety-four percent of the patients with acute abdominal pain achieved complete gastric emptying within 3hours after the administration of water-soluble contrast media. All of them achieved complete gastric emptying within 6hours. The results suggested 6hours after oral intake of the contrast media is enough to complete transit of water-soluble contrast media through the stomach and avoid unnecessary risks.

Comparación del remifentanil con el fentanil en el control hemodinámico durante la laringoscopia en el paciente hipertenso en tratamiento: análisis interino de un estudio experimental / A comparison of the remifentanyl with fentanyl in the hemodynamic control during laringoscopy in the hypertense patient: interine analysis of the experimental study

A las dosis utilizadas el remifentanil comparativamente con el fentanil ofrece una mayor protección en el control hemodinámico del aumento en la tensión arterial sistólica, durante el primer minuto post-intubación en la inducción anestésica del paciente hipertenso en tratamiento. Sinembargo con el uso del remifentanil a estas dosis existe diferencia clinicamente significativas en hipotensión tanto en la post-inducción como en la post-intubación que generan riesgo en el paciente hipertenso en tratamiento.