Kohno M, Nakajima T, Someya G
School of Dentistry, Niigata University, First Department of Oral and Maxillofacial Surgery, Japan.
J Oral Maxillofac Surg. 1993 Sep;51(9):992-6. doi: 10.1016/s0278-2391(10)80042-4.
The effects of maxillomandibular fixation (MMF) on respiration were studied by measuring pulmonary function in 27 healthy volunteer subjects and in six post-operative patients who underwent MMF after sagittal split ramus osteotomies. In addition, airflow resistance of the mouth was measured in seven healthy subjects under MMF. In the healthy subjects, the ratio of forced expiratory volume in one second to forced vital capacity and peak expiratory flow rate were reduced by 22.9% and 52.1%, respectively, after application of MMF, indicating the presence of respiratory obstruction, whereas the ratio of forced vital capacity to predicted forced vital capacity, an indicator of restrictive respiratory defects, was not significantly affected. The obstructive type of respiratory defect was found to be the result of increased airflow resistance with MMF. The decrease of forced expiratory volume was greater in all postoperative patients than in the healthy subjects. The results indicate that careful preoperative and postoperative airway management is essential for the safety of patients undergoing MMF for the treatment of oral and maxillofacial conditions.
通过测量27名健康志愿者以及6名接受下颌升支矢状劈开截骨术后行颌间固定的术后患者的肺功能，研究了颌间固定（MMF）对呼吸的影响。此外，还测量了7名健康受试者在颌间固定状态下口腔的气流阻力。在健康受试者中，应用颌间固定后，一秒用力呼气量与用力肺活量的比值以及呼气峰值流速分别降低了22.9%和52.1%，表明存在呼吸阻塞，而作为限制性呼吸缺陷指标的用力肺活量与预测用力肺活量的比值未受到显著影响。发现这种阻塞型呼吸缺陷是颌间固定导致气流阻力增加的结果。所有术后患者的用力呼气量下降幅度均大于健康受试者。结果表明，对于接受颌间固定治疗口腔颌面部疾病的患者，术前和术后进行仔细的气道管理对其安全至关重要。
