The Best Calyceal Tract Approach for Treating Renal
Stones with Percutaneous Nephrolithotomy
Pontape Chanprasopon MD*,
Wisoot Kongchareonsombat MD*, Charoen Leenanupunth MD*,
Kittinut Kijvikai MD*, Wit Viseshsindh MD*
Affiliation :
* Division of Urology, Department of Surgery, Faculty of Medicine, Ramathibodi Hospital, Bangkok, Thailand
Objective : To compare the perioperative outcomes of percutaneous nephrolithotomy (PCNL) performed via the upper,
middle, and lower calyces.
Material and Method: The authors retrospectively reviewed 92 renal units in 92 patients who required PCNL at our institution
between 2006 and 2010. Patients with partial and full staghorn stones with total stone size ≥2 cm were included in the
present study. Patients were excluded if they had multiple small stones or a single stone <2 cm. The present study analyzed
92 renal units in 92 patients. The authors divided the patients into three groups (groups 1, 2, and 3) based on the surgical
approach, which was the upper, middle, and lower calyceal approaches. PCNL was performed using a standard ultrasonic
lithotriptor with a rigid nephroscope, and holmium: YAG laser lithotripsy was carried out with a flexible nephroscope, with
simultaneous nitinol tipless basket extraction of fragments. Procedures were repeated until the patients were rendered
stone-free (confirmed visually or by nephrostogram). Estimated blood loss, length of hospital stay, operative time, and the
number of procedures (to achieve stone-free status) were analyzed and compared among the groups, and complications
were reported.
Results : The present study showed that the length of hospital stay, estimated blood loss, number of procedures, and operative
time were not significantly different between the three groups. In Group 1, four patients had complications and included
two patients with mid-ureteral stone, and one patient each with renal pelvic perforation and urinary tract infection with
sepsis. One patient from Group 2 contracted a urinary tract infection. In Group 3, five patients exhibited complications and
included one with mid-ureteral stone, two with renal hemorrhage, and two with urinary tract infection.
Conclusion : The estimated blood loss, duration of hospital stay, operative time, number of procedures (to achieve stone-free
status), and complications did not statistically differ between the three groups. Moreover, very few complications occurred
in the different surgical approaches. Therefore, PCNL via all the three approaches were deemed safe and effective.
Keywords : Percutaneous nephrolithotomy, Upper calyx, Middle calyx, Lower calyx access
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