Vitzthum H G, Vorwerk U, Scheinpflug L, Begall K
Otto-von-Guericke-Universität Magdeburg, Medizinische Fakultät, Universitäts-HNO-Klinik.
Laryngorhinootologie. 1996 May;75(5):270-4. doi: 10.1055/s-2007-997577.
The human temporal bone preparation is a common model for research of physical processes of the ear canal and middle ear. In the past decade only a few reports were published discussing changes of the vibration behaviour of the tympanic membrane, as well as the ear canal resonance, during the time between death and preparation of the temporal bone. The aim of our study is to verify whether measurements at the temporal bone of dead humans can be really applied to the in vivo situation.
We investigated whether changes of the ear canal resonance and the vibration of the tympanic membrane depend on temperature and time after death. In a female human body we defined the resonance of the outer ear and the impedance of the tympanic membrane using a tympanometer and a real ear measurement system during nine hours post mortem.
We were able to prove that before the preparation of the temporal bone none of the parameters changed significantly.
In conclusion, the method of preserving the bone after its preparation is decisive for the validity of measurements at the isolated (post mortem) human temporal bone.
人类颞骨标本是研究耳道和中耳物理过程的常用模型。在过去十年中，仅有少数报告讨论了在颞骨死亡至制备期间鼓膜振动行为以及耳道共振的变化。我们研究的目的是验证对死亡人类颞骨的测量是否真的可应用于体内情况。
我们调查了耳道共振和鼓膜振动的变化是否取决于死后的温度和时间。在一名女性尸体中，我们在死后九小时内使用鼓室图仪和真耳测量系统确定了外耳的共振和鼓膜的声阻抗。
我们能够证明在颞骨制备之前，没有参数发生显著变化。
总之，制备后保存骨骼的方法对于在分离的（死后）人类颞骨上进行测量的有效性至关重要。
