A study of naloxone effect on urinary retention in the patient receiving morphine patient-controlled analgesia.

Purpose: The purpose of the study was to compare urinary retention rates following orthopaedic surgery in patients who received low-dose intravenous naloxone while receiving morphine patient-controlled analgesia with patients who did not receive naloxone.

Design: Randomized controlled trial without blinding.

Sample: There were 97 participants consenting to the study, 45 were randomly assigned to a control group and 52 assigned to an experimental group.

Ureteral stents: coil strength and durometer.

Objectives: To evaluate the coil strength before and after urine exposure and the stiffness of commercially available double-J ureteral stents because both properties may affect stent performance and patient comfort.

Methods: Twelve commercially available 6F ureteral stents were tested for coil strength before and after 30 days of urine exposure. The proximal end of each stent was inserted through a 2-mm hole in bologna, allowed to recoil, and then pulled using a handheld force gauge.

Ureteroscopic laser lithotripsy for upper urinary tract calculi with active fragment extraction and computerized tomography followup.

Purpose: Management of fragments generated by ureteroscopic laser lithotripsy remains controversial. In this study we explored the impact of active fragment extraction after ureteroscopic laser lithotripsy on stone clearance.

Materials And Methods: A total of 69 patients with 3 or less upper urinary tract calculi (5 to 15 mm) demonstrated on preoperative CT were prospectively evaluated.