RESUMO
INTRODUCTION: A frequent cause of weaning and extubation failure in critically ill mechanically ventilated patients is diaphragm muscle dysfunction. Ultrasound (US) evaluation of the diaphragm yields important data regarding its thickness (diaphragm thickening fraction [TFdi]) and its movement or excursion (diaphragmatic dynamics) that reveal the presence of diaphragmatic dysfunction. METHODS: Cross-sectional study, which included patients older than 18 years with invasive mechanical ventilation with an expected duration of more than 48â h, in a tertiary referral center in Colombia. The excursion of the diaphragm, inspiratory and expiratory thickness, and TFdi were evaluated by US. Prevalence and use of medications were evaluated, and the association with failure in ventilatory weaning and extubation was analyzed. RESULTS: Sixty-one patients were included. The median age and APACHE IV score were 62.42 years and 78.23, respectively. The prevalence of diaphragmatic dysfunction (assessed by excursion and TFdi) was 40.98%. The sensibility, specificity, positive predictive value, and negative predictive value for TFdi < 20% was 86%, 24%, 75%, and 40%, respectively, with an area under the receiver operating characteristic (ROC) curve of 0.6. The ultrasonographic analysis of excursion of the diaphragm, inspiratory and expiratory thickness, and TFdi (>20%) allow in its set and with normal values, predict success or failure for the extubation with an area under the ROC curve of 0.87. CONCLUSION: Diaphragmatic dynamics and thickness parameters together assessed by ultrasonography could predict the success of extubation in critically ill patients in Colombia, based on the finding of diaphragmatic dysfunction.
RESUMO
Los mecanismos que subyacen la reproducción humana son muy complejos, por lo que cualquier pérdida gestacional implica el tener que considerar diversas etiologías, más aun si se trata de pérdidas gestacionales recurrentes dentro de las que la inmunidad juega un papel especialmente importante. Desde hace varias décadas, el factor aloinmune ha sido reconocido como un desencadenante frecuente de la interrupción del embarazo, haciéndose de esta forma relevante su estudio en mujeres con aborto recurrente. En el presente artículo, a partir de una búsqueda sistemática de información, se revisan con detalle los aspectos relacionados con la fisiopatología, el diagnóstico y el tratamiento del aborto recurrente de etiología aloinmune, buscando con esto sensibilizar al profesional de la salud sobre su consideración ante una mujer con pérdida recurrente de la gestación.
The mechanisms underlying the human reproduction are very complex, so any pregnancy loss implies the need of considering various etiologies, even more if those pregnancy losses are recurrent within which the immunity plays an important role. Since decades, the alloimmune factor has been recognized as a frequent trigger of the pregnancy interruption, thus becoming relevant its study in women with recurrent miscarriage. In the present article, through a systematic search of information, details concerning to the physiopathology, diagnosis and treatment of the recurrent miscarriage of alloimmune etiology are reviewed, looking to sensitize the health professional about its consideration when evaluating a woman with recurrent pregnancy loss.
