Gimsing S
Ann Otol Rhinol Laryngol. 1983 May-Jun;92(3 Pt 1):305-8. doi: 10.1177/000348948309200318.
Animal experiments have shown that gas absorption can produce a considerable intratympanic underpressure when the gas composition of the middle ear is disturbed. A similar phenomenon was observed in children with serous otitis. In 12 ears with underpressures exceeding -150 mm H2O, Valsalva inflation or politzerization produced a transient improvement followed by a rapid return to subatmospheric pressures ranging from -130 to -300 mm H2O. In four cases with middle ear pressures between -65 and -135 mm H2O, the same procedure did not result in any significant underpressures. These findings suggest that inflation of the middle ear in the presence of a deep underpressure serves no purpose. It is also possible that a negative pressure, once established, can be maintained in this way.
动物实验表明，当中耳的气体成分受到干扰时，气体吸收会产生相当大的鼓室内负压。在患有浆液性中耳炎的儿童中也观察到了类似现象。在12只负压超过-150 mm H2O的耳朵中，瓦尔萨尔瓦氏吹张法或波利策氏吹张法可产生短暂改善，随后迅速恢复到-130至-300 mm H2O的低于大气压的压力。在4例中耳压力在-65至-135 mm H2O之间的病例中，相同的操作未导致任何显著的负压。这些发现表明，在存在深度负压的情况下对中耳进行吹张没有任何作用。也有可能一旦形成负压，就可以通过这种方式维持。
