RESUMO
Purpose To investigate the value of bedside ultrasonography for emergent patients in the diagnosis of vasa previa and umbilical cord prolapse. Materials and Methods The bedside ultrasonography data of 12 emergent cases of vasa previa and 18 emergent cases of umbilical cord prolapse were retrospectively analyzed for detection rate. Results Nine out of 12 emergent patients with vasa previa were detected by bedside ultrasonography;2 were misdiagnosed as umbilical cord prolapsed;and 1 patient who had missed diagnosis suffered fetal demise during vaginal labour. Fifteen out of 18 emergent patients with umbilical cord prolapse were detected by bedside ultrasonography;2 were misdiagnosed as vasa previa; and 1 missed diagnosis (no death case was reported). The detection rates for both groups of patients had no significant difference (P>0.05). Conclusion Bedside ultrasonography for emergent patients can visualize the traveling of vasa previa and umbilical cord prolapse so as to promptly provide evidence for clinical diagnosis and reduce perinatal mortality.
RESUMO
Objective To discuss whether ultrasonic attenuation dual calibration quantitative analysis may acquire highly repeatable checkout results. Methods With dual calibration phantom as references, under different total gain and depth compensation gain of B-mode ultrasonic scanner, test pending samples were tested. Different group images were collected and analyzed with self-developed ultrasonic attenuation quantitative analysis software. Results Test data had high repeatability under different total gain and depth compensation gain of B-mode ultrasonic scanner. Conclusion Ultrasonic attenuation dual calibration quantitative analysis can be used for quantitative analysis of B-mode ultrasonic images.