[Impact of disease duration of lumbar disk herniation on bladder dysfunction]

To analyze the association between the disease duration and bladder dysfunction in lumbar disk herniation patients.

The urodynamic parameters of 85 lumbar disk herniation patients with different disease duration, 26 with the duration < 1 year (Group A), 31 with the duration of 1 - 5 years (Group B), and 28 of the duration > 5 years (Group C), were retrospectively analyzed.

The average post-voiding residual volume of Group A was 50 ml, significantly lower than those of Groups B and C (80 ml and 120 ml respectively, both P < 0.05) with significant difference between Groups B and C too (P < 0.05). The average maximum cystometric capacity of Group A was (375 +/- 147) ml, significantly higher than those of Groups B and C [(481 +/- 184) ml and (562 +/- 173) ml respectively, both P < 0.05] and there was significant difference between Groups B and C too (P < 0.05). The average volume at the first desire to void of Group A was (220 +/- 88) ml, significantly lower than those of Groups B and C [(247 +/- 132) ml and (356 +/- 199) ml respectively, both P < 0.05], however, there was no significant difference between Groups A and B (P > 0.05). There were no significant differences in the maximum flow rate, maximum detrusor pressure, and bladder compliance among the three groups (all P > 0.05).

Prolonged disease duration of lumbar disk herniation worsens the bladder function.