Hampal S, Flood L M, Kumar B U
Research Foundation, North Riding Infirmary, Middlesbrough.
J Laryngol Otol. 1991 Mar;105(3):161-4. doi: 10.1017/s0022215100115269.
One hundred and sixteen children with otitis media with effusion underwent myringotomy and insertion of a conventional pattern of Shah grommet in one ear and the much smaller Mini Shah grommet in the other. Close observation post-operatively determined the comparative rate of extrusion, recurrence of effusion, and of onset and degree of tympanosclerosis. At one year review, the Mini Shah shows a significantly earlier extrusion and a greater tendency to recurrence of otitis media with effusion. However, this is compensated by a decreased incidence of tympanosclerosis and reduced severity in those affected. This tends to support the view that shear forces produced by heavier patterns of ventilation tube promote tympanosclerosis.
116名中耳积液患儿接受了鼓膜切开术，一只耳朵植入传统型号的沙氏通气管，另一只耳朵植入小得多的迷你沙氏通气管。术后密切观察确定了通气管脱出的比较率、积液复发率以及鼓室硬化的发生和程度。在一年的复查中，迷你沙氏通气管显示出明显更早的脱出以及中耳积液复发的更大倾向。然而，鼓室硬化的发生率降低以及患者病情严重程度减轻对此起到了弥补作用。这倾向于支持这样一种观点，即较重型号的通气管产生的剪切力会促进鼓室硬化。
