Objective To investigate the value of non-enhanced spiral CT for upper urinary tract calculi pneumatic lithotripsy(PL)and provide more scientific basis for clinical treatments.

Methods Ninetythree PL treatment of patients with upper urinary tract stones were divided into A, B, C three groups according to the PL times.The average CT values were comparatively analyzed.

Results The average CT values have a statistically significant difference(F=43.271, P=0.000).

Conclusions Patients with upper urinary tract stones before the average CT value can be used to estimate the difficulty of lithotripsy.In the choice of treatment times and programs, it should be comprehensive analysis of stone location, quantity, level of operator, equipment performance, patient tolerance and other factors.For the fragile factor of stone, it recommend that when CT value < 900 HU and size of stones suitable(maximum diameter < 2 cm), when the preferred PL, when the CT value > 1200 HU and larger(maximum diameter > 2.5 cm)or more than four multiple stones surgery should be selected.