Ultrasound Unit and Fetal Medicine, University Hospital of Canary Islands, Tenerife, Canary Islands, Spain.
Ultrasonics. 2013 Jan;53(1):17-22. doi: 10.1016/j.ultras.2012.03.006. Epub 2012 Aug 14.
The purpose of this work was to validate a new clinical obstetrics and gynecology (OB-GYN) application for a hand-held ultrasound (US) device. We modified the smallest hand-held device on the market and tested the system for transvaginal (TV) use. This device was originally conceived for abdominal scanning only.
The validation involved 80 successive patients examined by the same operator: 25 obstetric and 55 gynecologic cases. US examination was performed transvaginally with two US systems: the hand-held Vscan (General Electrics; GE Vingmed Ultrasound; Norway) for which an intravaginal gadget TTGP-2010® (Troyano transvaginal gadget probe) was designed, and the Voluson 730 Expert (multifrequency transvaginal ultrasound of 3-9MHz; GE Healthcare, Milwaukee, WI, USA). We performed the same measurements with both US systems in order to confirm whether or not their diagnostic capability was similar. Quantitative difference in measurements between the systems was assessed, as well as the overall diagnostic detection rate and suitability for telemedicine.
Regarding lesion visibility with Vscan, optimal distance was 8-16cm depending on the examination type, and the total detection rate was 98.7%. The exception was an ovarian endometrioma, diagnosed as a follicular cyst using the hand-held device. Assessment of reproducibility in 180 measurements showed that the measurements obtained with Vscan were 0.3-0.4cm lower than those obtained with the high resolution US device (Voluson 730 Expert). Nevertheless, Pearson's correlation coefficient was high for biparietal diameter (0.72) and gynecological (GYN) (0.99) measurements, and for overall correlation (0.997). Image transport on USB and SD-flash cards proved convenient for telemedicine.
A novel TV application of a hand-held US device is demonstrated for OB-GYN. Heart, abdominal and obstetrics presets of the Vscan together with color-Doppler enable a detection capability comparable to that of a high-definition US device. The lower values of the measurements obtained by the hand-held device (by 0.3-0.4cm) must be taken into account, although they have no effect on its diagnostic capability.
本研究旨在验证一款新的手持式超声（US）设备在妇产科的临床应用。我们对市场上最小的手持式设备进行了改进，并对其经阴道（TV）使用的系统进行了测试。该设备最初仅用于腹部扫描。
这项验证涉及 80 例连续患者，均由同一位操作人员进行检查：25 例产科和 55 例妇科病例。使用两种 US 系统进行经阴道超声检查：一款是专为经阴道扫描设计的手持 Vscan（通用电气；GE Vingmed Ultrasound；挪威），另一种是 Voluson 730 Expert（多频率经阴道超声 3-9MHz；GE Healthcare，密尔沃基，威斯康星州，美国）。我们使用这两种 US 系统进行相同的测量，以确认它们的诊断能力是否相似。评估了两种系统之间测量的定量差异，以及整体诊断检测率和远程医疗适用性。
关于 Vscan 对病变的可视性，根据检查类型，最佳距离为 8-16cm，总检出率为 98.7%。唯一的例外是卵巢子宫内膜异位囊肿，使用手持式设备诊断为滤泡囊肿。对 180 次测量的重复性评估显示，Vscan 获得的测量值比高分辨率 US 设备（Voluson 730 Expert）低 0.3-0.4cm。然而，双顶径（0.72）和妇科（GYN）（0.99）测量的 Pearson 相关系数较高，总体相关系数为 0.997。通过 USB 和 SD 闪存卡传输图像非常适合远程医疗。
为妇产科演示了一种新型的手持式 US 设备的 TV 应用。Vscan 的心脏、腹部和产科预设以及彩色多普勒功能使其具有与高分辨率 US 设备相当的检测能力。尽管手持式设备获得的测量值较低（低 0.3-0.4cm），但必须考虑到这一点，尽管它们对其诊断能力没有影响。
