Kotby M N, Hegazi M A, Kamal I, Gamal El Dien N, Nassar J
Unit of Phoniatrics, Faculty of Medicine, Ain Shams University, Cairo, Egypt.
Folia Phoniatr Logop. 2009;61(1):24-8. doi: 10.1159/000188660. Epub 2009 Jan 8.
The aim of this work is to study the hitherto unclear aerodynamic parameters of the pseudo-glottis following total laryngectomy. These parameters include airflow rate, sub-pseudo-glottic pressure (SubPsG), efficiency and resistance, as well as sound pressure level (SPL).
Eighteen male patients who have undergone total laryngectomy, with an age range from 54 to 72 years, were investigated in this study. All tested patients were fluent esophageal 'voice' speakers utilizing tracheo-esophageal prosthesis. The airflow rate, SubPsG and SPL were measured.
The results showed that the mean value of the airflow rate was 53 ml/s, the SubPsG pressure was 13 cm H(2)O, while the SPL was 66 dB. The normative data obtained from the true glottis in healthy age-matched subjects are 89 ml/s, 7.9 cm H(2)O and 70 dB, respectively. Other aerodynamic indices were calculated and compared to the data obtained from the true glottis.
Such a comparison of the pseudo-glottic aerodynamic data to the data of the true glottis gives an insight into the mechanism of action of the pseudo-glottis. The data obtained suggests possible clinical applications in pseudo-voice training.
本研究旨在探究全喉切除术后声门假性结构迄今尚不明确的空气动力学参数。这些参数包括气流速率、声门下假腔压力（SubPsG）、效率和阻力，以及声压级（SPL）。
本研究纳入了18例接受全喉切除术的男性患者，年龄在54至72岁之间。所有受试患者均为使用气管食管发音假体的流利食管“发音”者。测量了气流速率、SubPsG和声压级。
结果显示，气流速率的平均值为53毫升/秒，SubPsG压力为13厘米水柱，而声压级为66分贝。在年龄匹配的健康受试者中，从真声门获得的标准数据分别为89毫升/秒、7.9厘米水柱和70分贝。计算了其他空气动力学指标，并与从真声门获得的数据进行了比较。
将声门假性结构的空气动力学数据与真声门的数据进行这样的比较，有助于深入了解声门假性结构的作用机制。所获得的数据表明在假性嗓音训练中可能具有临床应用价值。
