Diagnosis of voiding dysfunction by pressure-flow study in women

Table 3 Urodynamic criteria to define bladder outlet obstruction and detrusor underactivity in women

Bladder outlet obstruction
Cutoff criteria[21]	pdetQmax≥ 25 cm H2O + Qmax ≤ 12 mL/s
Video-urodynamic criteria[23]	Radiographic evidence of obstruction between the bladder neck and distal urethra in the presence of a sustained detrusor contraction of any magnitude, usually associated with reduced or delayed urinary flow rate
Nomogram[24]	See Figure 3
Detrusor underactivity
Projected isovolumetric pressure 1[30]	pdetQmax + Qmax < 30 cm H2O
Cutoff criteria[32]	pdetQmax < 10 cm H2O + Qmax < 12 mL/s “and significant rise in abdominal pressure”