Edith Valdéz-Martínez

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OBJECTIVE To describe how local research ethics committees (LRECs) consider and apply research ethics in the evaluation of biomedical research proposals. DESIGN A qualitative study was conducted using purposeful sampling, focus groups and a grounded theory approach to generate data and to analyse the work of the LRECs. SETTING AND PARTICIPANTS 11 LRECs(More)
This paper reports on a series of studies that were conducted at the Mexican Institute of Social Security (IMSS) between 2001 and 2002 to determine the role, structure and workings of their local research ethics committees (LRECs). The IMSS, unlike other Mexican health institutions, has a formal system of committees. Such committees operate under a(More)
OBJECTIVES We assessed the effect of using preoperative sodium fluoride (NaF) on the difficulty of working with the footplate during stapedectomy and its effect on the postsurgical hearing gain in patients with mixed otosclerosis (i.e., otosclerosis and/or otospongiosis). METHODS There were 2 groups of patients with mixed otosclerosis. The experimental(More)
BACKGROUND Umbilical cord banks are a central component, as umbilical cord tissue providers, in both medical treatment and scientific research with stem cells. But, whereas the creation of umbilical cord banks is seen as successful practice, it is perceived as a risky style of play by others. This article examines and discusses the ethical, medical and(More)
BACKGROUND Children with cancer, parents, and clinicians, face difficult decisions when cure is no longer possible. Little is known about decision-making processes, how agreement is reached, or perspectives of different actors. Professionals voice concerns about managing parental expectations and beliefs, which can be contrary to their own and may change(More)
The objective of this study was to describe the cultural domain of ethical behaviours in clinical practice as defined by health care providers in Mexico. Structured interviews were carried out with 500 health professionals employed at the Mexican Institute of Social Security in Mexico City. The Smith Salience Index was used to evaluate the relevance of(More)
OBJECTIVE To determine the degree of concordance between clinical and autopsy diagnosis. MATERIAL AND METHODS The records of 67 autopsies and clinical files of children and adults, comprising the years 1995 to 1996, from a third level hospital in the State of Veracruz, Mexico, were revised. The concordance score was calculated with the statistical kappa.(More)
OBJECTIVE To report a pneumatosis coli case. CASE REPORT A 56 year old man was submitted to a routine medical check up. During rectosigmoidoscopy examination many submucous lesions of cystic aspect were found, which were demonstrated by different imaging methods and endoscopy. CONCLUSION The pneumatosis coli is an infrequent pathology in our means and(More)
OBJECTIVE To identify ethics committees in medical practice in Mexico and possible implications stemming from their composition and functions. METHODS A cross-sectional descriptive study was conducted from January-December 2005. A survey was sent by e-mail to the hospitals and family medicine centers with at 10 practices within the Mexican Institute for(More)
OBJECTIVE To identify the structure, composition and work of the local research ethics committees (LRECs) of the Mexican Institute of Social Security (IMSS) in Mexico. DESIGN A descriptive cross-sectional study was performed that included all LRECs of the IMSS. METHODS A total of 335 questionnaires coded in advance were posted to each LREC secretary.(More)