男子高齢者の排尿障害に関する研究第3報 : 波型および尿流量率より見た小児,若年成人,一般中高年者の尿流量曲線の比較

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尿流量曲線(排尿状態)は,若年成人をピークとして,尿流量率・波型ともに,加齢とともに悪化し,50歳以後に著明な排尿状態の変化が出現する.50歳代より,後部尿道における器質的(前立腺肥大症など)な変化と同時に機能的な変化も始まり,尿道抵抗の増大をきたすWe performed uroflowmetric study in 8 boys (7 approximately 14 years old), 20 young adults (19 approximately 39 years old) and 552 elderly men (40 approximately 93 years old) with a DISA 21C10 mictiometer, and obtained 753 studies. Uroflowmetric studies were classified into 6 patterns: N type (normal), NB type (neurogenic bladder: wave-like curve), OB type (obstructive diseases: flat curve), AP type (anterior peak), PP type (posterior peak) and OT type (others). We studied the relationship between age and uroflowmetry with patterns and flow rates (maximum flow rate = MFR, average flow rate = AFR). In men over 19 years old, flow rates (MFR, AFR) decreased proportionally with age (MFR: 2.9 ml/s/10 years old, AFR: 1.6 ml/s/10 years old). In elderly men (over 40 years old), the N type flow curve decreased and OB type flow curves increased gradually with age.