Analysis of the Value of Transabdominal Ultrasound and Spiral CT in the Diagnosis of Small Ureteral Calculi
Objective To evaluate the diagnostic value of transabdominal ultrasound and spiral CT plain scan in detecting small ureteral calculi.Methods The imaging data of 172 patients with acute Renal colic diagnosed and treated in our hospital in the past three years were retrospectively analyzed by transabdominal ultrasound and spiral CT.The difference in the detection rate of ureteral microlithiasis between the two methods was compared,and the diagnostic consistency of the two methods was evaluated.Result sThe average age of 172 patients with acute Renal colic was 42.3±14.2 years old.61 cases(36.1％)were located in the upper segment,30 cases(17.7％)in the middle segment,and 78 cases(46.2％)in the lower segment.There was a statistical difference in the diameter of the lower segment stones compared to the upper and middle segments stones(P＜0.05).The diagnostic accuracy,missed diagnosis rate,and misdiagnosis rate of 5mm conventional CT plain scan were 93.0％,5.2％,and 1.8％,respectively,significantly superior to the diagnostic accuracy(45.9％),missed diagnosis rate(45.3％),and misdiagnosis rate(8.8％)of transabdominal ultrasound.The consistency between spiral CT plain scan and transabdominal ultrasound examination in diagnosing small ureteral stones is poor(Kappa=0.35).The detection rate of small stones in various segments of the ureter by transabdominal ultrasound was significantly lower than that by CT plain scan(P＜0.05).The diameter of small ureteral stones in the ultrasound detection group was significantly larger than that in the non detection group(P＜0.05).Conclusion The detection rate of small ureteral stones by transabdominal ultrasound is low,and when ureteral dilation was first detected through screening,spiral CT plain scan has a better diagnostic effect.
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