RESUMO
BACKGROUND: Quadratus femoris tear is an uncommon injury that usually cause hip pain, it incidence is unknown. The patient can suffer of posterior gluteal pain or groin pain or both, which makes accurate diagnosis difficult, because the differential diagnosis of hip pain is broad. CLINICAL CASE: A 65 years old male, with gluteal and groin pain presented during tennis; evaluated by neurologist with lumbosacral magnetic resonance imaging (MRI) (normal) and referred to physical therapy, a pelvic MRI was required, finding an unsuspected quadratus femoris tear. CONCLUSION: MRI with its superior soft-tissue resolution and multiplanar capability is an excellent adjunct to physical examination because it shows the anatomic location of the abnormality, aiding the clinician to make unsuspected diagnoses.
ANTECEDENTES: La ruptura del músculo cuadrado crural es una lesión poco frecuente que se manifiesta por dolor en cadera y cuya incidencia se desconoce. El paciente puede manifestar dolor en región glútea y/o inguinal, su diagnóstico clínico es difícil por su rareza y porque el diagnóstico diferencial de problemas de cadera es amplio. CASO CLÍNICO: Masculino de 65 años con dolor en regiones glútea e inguinal derechas manifestadas durante la práctica de tenis, evaluado por neurología con resonancia magnética nuclear (RMN) lumbosacra (normal) y canalizado a rehabilitación. Se solicitó RMN de pelvis, la cual reveló ruptura del cuadrado crural derecho no sospechada previamente. CONCLUSIÓN: La RMN por su capacidad para mostrar cortes multiplanares es el estudio de elección en problemas de tejidos blandos en cadera, ya que permite localización y auxilia en diagnóstico de problemas no sospechados.
Assuntos
Imageamento por Ressonância Magnética , Músculo Esquelético , Idoso , Articulação do Quadril , Humanos , Masculino , Músculo Esquelético/diagnóstico por imagem , Músculo Esquelético/lesões , Ruptura , Coxa da PernaRESUMO
The use of double-pulse laser-induced breakdown spectroscopy (DP-LIBS) in quantitative analysis generally depends on standards and calibration curves. To our knowledge, in this Letter, we report the first quantitative analysis based on DP-LIBS at low ablative energies with a self-calibrated method. We compare the effects of plasmas on the calibration-free LIBS technique, generated by DP-LIBS, and the traditional single-pulse (SP) LIBS on a steel sample. Our analyses reveal that when SP-LIBS and DP-LIBS reach comparable emission line intensities, plasma parameters and quantitative analysis are practically the same for both experiments. Additionally, we report the behavior of the emission enhancement of some elements (Fe and Cr) at low ablative pulse energies (0.2-8 mJ) using the orthogonal reheating DP-LIBS configuration.
RESUMO
Based on the UV-vis absorption spectra of commercially bottled tequilas, and with the aid of multivariate analysis, it is proved that different brands of white tequila can be identified from such spectra, and that 100% agave and mixed tequilas can be discriminated as well. Our study was done with 60 tequilas, 58 of them purchased at liquor stores in various Mexican cities, and two directly acquired from a distillery. All the tequilas were of the "white" type, that is, no aged spirits were considered. For the purposes of discrimination and quality control of tequilas, the spectroscopic method that we present here offers an attractive alternative to the traditional methods, like gas chromatography, which is expensive and time-consuming.