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OBJECTIVES: To evaluate the differences concerning cognitive performance, oxidative stress and vitamin B12 levels in omeprazole users under treatment for longer than six months. METHODS: A case-control study was developed with 44 omeprazole users (OU; 81.8 % female, 66 ± 8.7 years old) and 35 nonusers (NOU; 88.6 % female, 62 ± 8.7 years old). The cognitive ability was assessed through tests approaching attention, memory and executive functions. The vitamin B12 was dosage using a chemiluminescent immunoassay and oxidative stress analysis, based on the evaluation of malondialdehyde, enzymatic activity of extracellular superoxide dismutase, glutathione peroxidase, catalase and the ferric reducing antioxidant power in plasma. KEY FINDINGS: A significant increase of the ferric reducing antioxidant power [omeprazole users (OU) group = 1690 µM ± 441 and nonusers (NOU) group = 1308 ± 616; P value=0.002] and a decrease on glutathione peroxidase levels [OU group = 0.534 (0.27-10.63) and NOU group = 71.86 (14.36-173.1); P value=0.006] were found on omeprazole users group, as well as differences on cognitive performance, with impairments on executive functions, automatic and attentional processing. CONCLUSIONS: Long-term use of omeprazole is suggested to induce an oxidative stress condition, which causes neurotoxicity and cognitive decline.

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BACKGROUND: The USA devotes roughly $200 billion (6%) of annual national health expenditures to medical devices. A substantial proportion of this spending occurs during orthopedic (eg, hip and knee) arthroplasties - two high-volume hospital procedures. The implants used in these procedures are commonly known as physician preference items (PPIs), reflecting the physician's choice of implant and vendor used. The foundations for this preference are not entirely clear. This study examines what implant and vendor characteristics, as evaluated by orthopedic surgeons, are associated with their preference. It also examines other factors (eg, financial relationships and vendor tenure) that may contribute to implant preference. METHODS: We surveyed all practicing orthopedic surgeons performing 12 or more implant procedures annually in the Commonwealth of Pennsylvania. The survey identified each surgeon's preferred hip/knee vendor as well as the factors that surgeons state they use in selecting that primary vendor. We compared the surgeons' evaluation of multiple characteristics of implants and vendors using analysis of variance techniques, controlling for surgeon characteristics, hospital characteristics, and surgeon-vendor ties that might influence these evaluations. RESULTS: Physician's preference is heavily influenced by technology/implant factors and sales/service factors. Other considerations such as vendor reputation, financial relationships with the vendor, and implant cost seem less important. These findings hold regardless of implant type (hip vs knee) and specific vendor. CONCLUSION: Our results suggest that there is a great deal of consistency in the factors that surgeons state they use to evaluate PPIs such as hip and knee implants. The findings offer an empirically derived definition of PPIs that is consistent with the product and nonproduct strategies pursued by medical device companies. PPIs are products that surgeons rate favorably on the twin dimensions of technology and sales/service.

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Introducción: los antiinflamatorios no esteroideos (AINES) son prescritos con frecuencia en la práctica médica y sus eventos adversos gastrointestinales aumentan la morbimortalidad, la cual puede disminuir utilizando profilácticamente inhibidores de la bomba de protones (IBP), misoprostol o anti H2. Objetivo: estimar la prevalencia de consumo de AINES en una población de consulta externa de Medicina Interna y, en ellos, determinar la frecuencia de prescripción profiláctica de IBP en pacientes con riesgo de sangrado gastrointestinal.Métodos: estudio prospectivo de prevalencia analítica con pacientes mayores de 18 años de la consulta externa de Medicina Interna de la Fundación Hospital San Carlos de Bogotá. Los pacientes consumidores de AINES fueron clasificados en tres grupos de riesgo de sangrado gastrointestinal con base en los factores de riesgo tradicionalmente descritos. Resultados: de 140 pacientes incluidos, el 30% tomaban AINES. El 47,6% (n=20) fueron clasificados en el grupo de bajo riesgo, el 28,5% (n=12) en el grupo de riesgo intermedio y el 23,8% (n=10) en el grupo de alto riesgo. El 47% (20 pacientes) de los que consumían AINES tomaban simultáneamente IBP. Con respecto a los grupos de riesgo, consumían IBP el 80% de alto riesgo, el 50% de riesgo intermedio y el 30% de bajo riesgo. Conclusión: en la población estudiada, la prescripción de IBP en pacientes de alto riesgo es superior a la informada en trabajos internacionales (80% versus menos del 50%). Hay formulación de IBP innecesaria en el 30% de los pacientes de bajo riesgo.

Introduction: Adverse gastrointestinal events related to non-steroid anti-inflammatory drugs (NSAIDs) which are frequently prescribed in medical practice increase morbidity and mortality. These can be reduced through prophylactic use of proton pump inhibitors proton pump (PPIs) or misoprostol anti H2. Objective: The objective of this study was to estimate the prevalence of NSAIDs use in a population of internal medicine outpatients and to determine the frequency of prophylactic prescriptions of PPIs for patients at risk of gastrointestinal bleeding. Methods: This was a prospective and analytical study of prevalence among patients over 18 years of age in the Internal Medicine outpatient service at the Hospital San Carlos in Bogota. Patients who consume NSAIDs were classified into three risk groups based on traditionally described risk factors for gastrointestinal bleeding. Results: Thirty percent of the 140 enrolled patients were taking NSAIDs. 47.6 % (n = 20) were classified in the low risk group, 28.5 % (n = 12) in the intermediate-risk group and 23.8 % (n = 10) in the high risk group. 47% (20 patients) of those taking NSAIDs were simultaneously taking PPIs. Eighty percent of the high risk group, 50% of the intermediate-risk group, and 30% of the low risk group were taking PPIs. Conclusion: PPIs were prescribed more frequently for high risk patients in this study population (80%) than has been that reported in international publications (less than 50%). The prescription of PPIs for 30% of the low risk patients is unnecessary.

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La enfermedad por reflujo gastroesofágico (ERGE) es una causa frecuente de consulta en gastroenterología. La ERGE tiene manifestaciones digestivas y extradigestivas. Las manifestaciones extradigestivas que con mayor frecuencia se asocian a ERGE son la tos crónica, laringitis crónica y dolor torácico. La laringitis crónica, definida como la inflamación de la laringe que persiste por más de unas semanas, se asocia de manera frecuente a ERGE en la práctica clínica. Sin embargo, en varios estudios donde se utilizó la monitoría de pH esofágico como herramienta diagnóstica, no se encontró una clara asociación entre laringitis crónica y reflujo. Además, estudios en los que se manejaron inhibidores de bomba de protones en pacientes con sospecha de laringitis crónica por reflujo, mostraron una alta tasa de fracaso terapéutico, ya que en la gran mayoría de los casos, los síntomas persistían a pesar de una adecuada inhibición de la secreción ácida. Consideramos que aunque la ERGE puede ser la responsable de algunos episodios de laringitis crónica, no es la enfermedad que está asociada con mayor frecuencia, y en muchos de los casos en los que se ha descartado razonablemente la ERGE como responsable de los síntomas, deben investigarse de manera exhaustiva otras causas.

Gastroesophageal reflux disease (GERD) is a frequent cause of consultations with gastroenterologists. Extra-digestive symptoms such as chronic coughing, laryngitis and chest pain are frequently associated with GERD. Chronic laryngitis is one of the symptoms most often associated with GERD, yet various studies which have used monitoring esophageal pH as a diagnostic tool have not found any clear association between chronic laryngitis and reflux. Moreover, studies which have treated patients suspected of having chronic laryngitis caused by reflux with proton pump inhibitors (PPIs) have had had rates of therapeutic failures. Symptoms continue to persist in these patients despite adequate inhibition of acid secretion. To date, no evidence exists of the association between chronic laryngitis and GERD, much less evidence of a causal relation. We consider that, although GERD may be responsible for some episodes of chronic laryngitis, it is not the illness most frequently associated with it, and in the many cases in which GERD has been reasonably ruled out, other potential causes must be investigated.

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