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Background: Assessment of bladder outlet obstruction (BOO) and urethral stricture are standard clinical practice in patients with lower urinary tract symptoms (LUTS). This is currently achieved through pressure-flow studies. Research indicates that voiding function impairment of the bladder is associated with detrusor, lower urinary tract and nervous factors, it is not suit to release the fact just depended on the urine flow rate.
Objective: To report a noninvasive technique and mathematic method of analysis for assessment of BOO in male subjects using noninvasive urodynamic(NUD)and to test the independent ability of noninvasive urodynamic data to evaluate the detrusor contractility．distinguish between voiding with and without abdomen force．classification of patients with and without obstructed using a nomogram similar to pressure—Qmax nomogram．
Conclusion: Using noninvasive urodynamic data during voiding and a nomogram had independent discriminatory ability related to classification of detrusor contractility and outlet tract obstructed．
Objective: To report a noninvasive technique and mathematic method of analysis for assessment of BOO in male subjects using noninvasive urodynamic(NUD)and to test the independent ability of noninvasive urodynamic data to evaluate the detrusor contractility．distinguish between voiding with and without abdomen force．classification of patients with and without obstructed using a nomogram similar to pressure—Qmax nomogram．
Conclusion: Using noninvasive urodynamic data during voiding and a nomogram had independent discriminatory ability related to classification of detrusor contractility and outlet tract obstructed．