One-shot dilation versus metallic dilation technique for access in percutaneous nephrolithotomy: comparison of efficacy, access time and fluoroscopic time
Somboon Phaijitwichian
Division of Urology, Department of Surgery, Nakornping Hospital, Chiang Mai 50180, Thailand; E-mail:
 Objective: The aim of this study was to compare the efficacy, access tract dilation time and fluoroscopic time between the one-shot dilation technique and telescopic metal dilatation technique in patients undergoing percutaneous nephrolithotomy in Nakornping Hospital.
Materials and Methods: Sixty-six patients who underwent percutaneous nephro-lithotomy from January 2020 to July 2021 were included in the study and they were randomly divided into two groups. In group 1 (32 patients), telescopic metal dilation was used, in group 2 (33 patients), the one-shot technique was used. Success rates of dilation, access tract dilation time and fluoroscopic time were evaluated.
Results: The success rate of dilation was 100% in both groups. The access tract dilation time was 835.63 ± 309.68 seconds in group 1 and 569.42 ± 314.75 seconds in group 2 (p = 0.001). The fluoroscopic time was 48.16 ± 22.16 seconds in group 1 and 41.97 ± 23.99 seconds in group 2 (p = 0.29). The access tract dilation time of the one-shot dilation technique was statistically significantly shorter than that in the telescopic metal dilatation group. The mean fluoroscopic time of the one-shot dilation technique was shorter than in telescopic metal dilatation but was not statistically significant.
Conclusion: One-shot dilation technique is as effective as telescopic metal dila­tation, with a significant reduction in access tract dilation time.
วารสารยูโร ปี 2564, July-December ปีที่: 42 ฉบับที่ 2 หน้า 154-159
Efficacy, Percutaneous nephrolithotomy, Efficacy, one-shot dilation, telescopic metal dilatation, access time, fluoroscopic time