CHANGE IN BLADDER CONTRACTION STRENGTH FOLLOWING TURP

1
CHANGE IN BLADDER CONTRACTION STRENGTH FOLLOWING
TURP
INTRODUCTION

• Isovolumetric bladder pressure is an accepted
  measure of contraction strength
• It can be estimated non-invasively using the
  penile cuff test
• The measurement (pcuff.int) can be coupled with
  urine flow rate and plotted on a nomogram to
  define BOO

AIM
The null hypothesis was that pcuff.int
(representing contraction strength) was unchanged
following TURP

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CHANGE IN BLADDER CONTRACTION STRENGTH FOLLOWING
TURP
METHODS

• 194 men already selected for TURP underwent
  measurement of pcuff.int before and 4 months
  following surgery
• RESULTS
• Overall pcuff.int decreased from 139 cmH2O to 108
  cmH2O (P lt 0.01)
• Those classified as obstructed pre operatively
  showed significantly greater decreases in
  pcuff.int .(151 cmH2O to 106 cmH2O)
• In a subgroup of 9 men tested 2 months after
  surgery mean pcuff.int decreased from 133 cmH2O
  to 98 cmH2O (P lt 0.05). This reduction was
  maintained at 4 and 6 months post op

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CHANGE IN BLADDER CONTRACTION STRENGTH FOLLOWING
TURP

• CONCLUSIONS
• There is a consistent and maintained fall in
  pcuff.int following TURP
• The changes appear to occur early following TURP
• These observed changes may represent a return
  towards normal detrusor contractility following
  removal of obstruction.