Department of Urology, University of Washington School of Medicine, Seattle, Washington 98195, USA.
J Endourol. 2010 Jun;24(6):939-42. doi: 10.1089/end.2009.0395.
A prototype ultrasound-based probe for use in ureteroscopy was used for in vitro measurements of stone fragments in a porcine kidney.
Fifteen human stones consisting of three different compositions were placed deep in the collecting system of a porcine kidney. A 2 MHz, 1.2 mm (3.6F) needle hydrophone was used to send and receive ultrasound pulses for stone sizing. Calculated stone thicknesses were compared with caliper measurements.
Correlation between ultrasound-determined thickness and caliper measurements was excellent in all three stone types (r(2) = 0.90, p < 0.0001). All 15 ultrasound measurements were accurate to within 1 mm, and 10 measurements were accurate within 0.5 mm.
A 3.6F ultrasound probe can be used to accurately size stone fragments to within 1 mm in a porcine kidney.
一种基于超声的输尿管镜用探头原型，用于在猪肾中对结石碎片进行体外测量。
将 15 个人工结石（由三种不同成分组成）放置在猪肾收集系统的深处。使用 2MHz、1.2mm（3.6F）针状水听器发送和接收用于结石尺寸测量的超声脉冲。计算出的结石厚度与卡尺测量值进行比较。
在所有三种结石类型中，超声确定的厚度与卡尺测量值之间的相关性都非常好（r²=0.90，p<0.0001）。所有 15 个超声测量值的误差均在 1mm 以内，10 个测量值的误差在 0.5mm 以内。
3.6F 超声探头可用于准确测量猪肾中结石碎片的大小，误差在 1mm 以内。
