Choosing the nephrostomy size after percutaneous nephrolithotomy

Area of Science:

• Urology
• Nephrology
• Surgical Outcomes

Background:

• Percutaneous nephrolithotomy (PCNL) is a common procedure for kidney stone removal.
• The size of the nephrostomy tube used post-PCNL can influence patient recovery and outcomes.
• Optimizing nephrostomy tube size is crucial for balancing efficacy and patient comfort.

Purpose of the Study:

• To compare the perioperative outcomes of PCNL using different nephrostomy tube sizes.
• To evaluate the impact of nephrostomy tube diameter on postoperative pain, analgesic use, blood loss, and hospital stay.

Main Methods:

• A prospective study involving 45 patients with normal renal function undergoing uneventful PCNL.
• Patients were divided into two nonrandomized groups: one receiving a 22-Fr (Group 1, n=24) and the other a 12-Fr (Group 2, n=21) nephrostomy tube.
• Pain was assessed using a Visual Analogue Scale (VAS) at 8 and 24 hours postoperatively; analgesic use, hemoglobin levels, renal function, and urinary leaks were also recorded.

Main Results:

• The 12-Fr group reported significantly lower VAS pain scores at 8 hours postoperatively compared to the 22-Fr group (P < 0.001).
• No significant differences were observed in VAS pain scores at 24 hours, analgesic use, hemoglobin drop, or hospital stay between the groups.
• Demographics and stone characteristics were comparable between the two groups.

Conclusions:

• A smaller bore (12-Fr) nephrostomy tube can reduce immediate postoperative pain following PCNL.
• The use of smaller tubes does not adversely affect blood loss or hospital duration.
• Smaller nephrostomy tubes are a safe and potentially more comfortable alternative to larger tubes after uncomplicated PCNL procedures.