Depireux P, de Leval J
Service d'Urologie; Centre Hospitalier Universitaire de Liège, Belgique.
Ann Urol (Paris). 1993;27(5):284-7.
Infravesical obstruction presents clinically in the form of dysuria. Urodynamic studies play an important role to distinguish between a disorder of detrusor contractility and a functional or organic obstruction. The value of uroflowmetry, static and voiding urethral pressure profiles, cystometry and electromyography is discussed. The instantaneous voiding profile appears to be the most useful test: it allows calculation of urethral resistance, which is the ratio between bladder voiding pressure and the square of flow. Bladder neck obstruction is present in more than 80% of cases with a value greater than 0.5. Obstacles are more easily identified clinically in women, but the same tests can be applied with a poorer reliability for urethral resistance.
膀胱以下梗阻临床上表现为排尿困难。尿动力学研究对于区分逼尿肌收缩功能障碍与功能性或器质性梗阻起着重要作用。本文讨论了尿流率测定、静态和排尿期尿道压力图、膀胱测压及肌电图的价值。瞬时排尿图似乎是最有用的检查：它能计算尿道阻力，尿道阻力是膀胱排尿压力与尿流率平方的比值。在超过80%的病例中，当该值大于0.5时存在膀胱颈梗阻。临床上女性更容易识别梗阻情况，但对于尿道阻力而言，同样的检查应用时可靠性较差。
