ABSTRACT
RESUMEN Fundamento: el doppler transcraneal es una técnica que se mantiene en constante desarrollo y constituye una medida indirecta de la presión intracraneal. Objetivo: demostrar el valor pronóstico del doppler transcraneal en pacientes con hemorragia intraparenquimatosa cerebral espontánea. Método: se realizó un estudio prospectivo a 50 pacientes ingresados con el diagnóstico de hemorragia intraparenquimatosa cerebral de causa no traumática, en las primeras 12 horas de su admisión, se determinó el índice de pulsatilidad y velocidad media en la arteria cerebral media bilateralmente. Se realizó un estudio univariado a edad, presencia de sangre intraventricular, velocidad media, volumen del hematoma y valores del doppler transcraneal. Se evaluó la existencia de correlación entre los valores del índice de pulsatilidad con la velocidad media. A los valores del doppler transcraneal se le hallaron los valores predictivos. Resultados: se obtuvo una asociación significativa entre volumen del hematoma, valores del doppler transcraneal y electrocardiograma con la sobrevida. Además, se encontró correlación entre este último parámetro y el doppler trancraneal. El área bajo la curva de característica operativa del receptor del doppler transcraneal en el hemisferio afectado fue altamente predictiva de mortalidad con alta sensibilidad y especificidad para puntos de corte del índice de pulsatilidad en 1,85 y de velocidad media en 32,3 cm/s. Conclusiones: la escala de coma de Glasgow y el volumen de hematoma son los principales indicadores pronósticos de sobrevida en pacientes con hemorragia intraparenquimatosa espontánea.
ABSTRACT Background: transcranial doppler is a technique which is constantly being developed and constitutes an indirect measure of intracranial pressure. Objective: to demonstrate the prognostic value of transcranial doppler in patients with spontaneous cerebral intraparenchymal hemorrhage. Method: a prospective study was carried out on 50 patients admitted with the diagnosis of intraparenchymal cerebral hemorrhage of non-traumatic cause in the first 12 hours of admission, the pulsatility rate and average velocity in the middle cerebral artery was determined bilaterally. A univariate study was performed at age, presence of intraventricular blood, average speed, hematoma volume and transcranial doppler values. The existence of correlation between the pulsatility index values and average speed with the average speed was evaluated. The values of transcranial doppler were found their predictive values. Results: a significant association was obtained among hematoma volume, transcranial doppler values and electrocardiogram with survival. In addition, a correlation was found between this last parameter and the transcranial doppler. The area under the operating characteristic curve of the transcranial doppler receptor in the affected hemisphere was highly predictive of mortality with high sensitivity and specificity for cut-off points of the pulsatility index at 1.85 and average speed at 32.3 cm/s. Conclusions: glasgow coma scale and hematoma volume are the main prognostic indicators of survival in patients with spontaneous intraparenchymal hemorrhage.
ABSTRACT
Objective To investigate the ultrasonic performance of carotid atherosclerotic plaque and the correlation between microvessel density in plaque .Methods 87 cases of patients undergoing carotid artery plaque dissection were selected .113 plaques were found .All patients were taken carotid color Doppler sonography test and analysis of the plaque .The maximum thickness of plaques was taken HE stained ,and the vessel density in the plaque was counted .The correlation with sonographic performance of plaques was analyzed .Results The maximum plaque thicknesses in hard plaque ,soft plaque and mixed plaque were (0.49 ±0.05)mm,(0.36 ±0.08)mm and (0.39 ± 0.10)mm,respectively,and cross-sectional area stenosis rates were (88.32 ±6.51)%,(68.92 ±12.05)% and (71.95 ±13.04)%,respectively,the differences were statistically significant (F=16.329,23.723,all Pmixed plaques>hard plaque,the differences were statistically significant (t=6.579 and 9.392,all P<0.05).Pearson cor-relation analysis showed that the maximum plaque thickness and cross -sectional area stenosis rate in soft plaque were positive correlation between microvascular density values (r=0.372,P=0.011;r=0.438,P=0.000).Conclusion Color Doppler ultrasound examination might indirectly reflect microvessel densities in carotid artery plaque .It could be used preliminary assessment of vulnerability of carotid artery plaque .
ABSTRACT
Objective The aim of the study was to determine the diagnostic value of color Doppler ultrasound in the assessment of the retinal detachment. Methods The changes of ultrasonograph of the retinal detachment were retrospectively observed in 35 cases of 31 opei-ation proven retinal detachment patients. Results Color Doppler ultrasound had an accuracy of 97.1% (34/35) for diagnosing retinal detachment. In 33 cases of retinal detachment, the results of color Doppler flow imaging(CDFI) showed the color blood-flow signal in the vitreous membrane echo,extending with central retinal artery and vein. Conclusion For the color blood-flow signal in the vitreous membrane echo by CDFI ,extending with central retinal artery and vein, has a specificity of diagnostic value for retinal detachment, and the color Doppler ultrasound has a high accuracy for diagnosing retinal detachment.