Modified J nephrostomy catheter for intravesical pressure measurement in urodynamics

The influence of a transurethrally inserted 8.3-F modified J-nephrostomy catheter on urinary flow rate was investigated by both spontaneous uroflowmetry and pressure flow study in patients with almost identical bladder volumes. No statistically significant differences were found between maximum and mean flow rates obtained by spontaneous uroflowmetry and pressure flow study, respectively. Consequently, transurethral catheter placement is recommended in routine urodynamics.