Pyloric Volume Of Ultrasound Detection And Diagnosis Of Hypertrophic Pyloric Stenosis Value

Objectives: To derive a formula for ultrasonographic estimated pyloric volume based on a hypothesis of pyloric volume, and to test its accurary and its clinic feasibility.Methods: Deriving a cylinder formula for pyloric volume measure with an ultrasonic based on a hypothesis of pyloric volume: PV＝π·PL·MT·(PD－MT).outside body, The comparison between the pyloric volume of apart from 30 rabbit measured and the pyloric volume on exchanging with water to test its accurary; inside body, comparison between pyloric measured pre-surgery and pyloric measure at the time surgery in 30 HPS patients to test clinic feasibility.Results:(1) The error of pyloric volume measurements with B-US:outside body test, absolute error,－1.06ml±0.38ml(range,－0.45ml～1.75ml),relative error,－19.39﹪±4.84﹪(range,－10.2﹪～－3﹪)。Inside body test,absolute error,－0.18ml±0.60ml(range,－0.93ml～0.65ml),relative error,－3.36﹪±14.20﹪(range,－30.5﹪～23.5﹪).(2) There was a significant correlation between measurement volume outside body test (r=0.891, P<0.05; Vmeasure=0.422+　0.89Vtrue) or inside body test(r=0.947, P<0.05; VUS=0.082+　0.95Vsurgery)and the pyloric true volume.Conclusions: The ultarsound measuring cylinder formula PV＝π·PL·MT·(PD－MT) is an accurate, easily-performed and highly -duplicated methods for the pyloric volume.Therefore , it is valuable in clinical practice.