Aims of Study: The ICS nomogram classifies patients as obstructed (O), equivocal (E) or unobstructed (U) using maximum flow (Qmax) and detrusor pressure at maximum flow (Pdet,Qmax) from an invasive pressure flow study (PFS). The penile-cuff pressure required to interrupt flow (Pcuff,int) provides a non-invasive estimate of isovolumetric bladder pressure (Pves,isv). This paper considers the expected relationship between Pcuff,int (or Pves,isv) and Pdet,Qmax and the modification required to the ICS nomogram to produce a nomogram for the cuff test. Non-invasive data from 2 large urology departments were used to assess the modified nomogram.
Griffiths C, Blake C, Harding C, McIntosh S, Drinnan MJ, Robson W, et al. Non invasive bladder pressure: the case for using a modified ICS nomogram. Neurourol Urodynamics 2003; 22: 367 68.
Clive J. Griffiths or Dr. Michael J. Drinnan, Freeman Unit, Newcastle upon Tyne. Tel: +44 (0)191-223-6161.
Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, NE7 7DN, UK.
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