Laser-assisted myringotomy extends the entilation period seeral weeks,153 but randomized trials with concurrent controls hae not been conducted to establish efficacy.

• 激光辅助的鼓膜切开术延长通气时间达几周，但是同期对照随机试验没有证明其有效。相反的，鼓膜造孔插管使中耳空气流通的平均时间达12到14个月。