Hansen L G, Warwick W J
Department of Pediatrics, University of Minnesota, Minneapolis 55414.
Biomed Instrum Technol. 1990 Jul-Aug;24(4):289-94.
The authors developed a high-frequency chest compression (HFCC) device to aid in mucous clearance for patients with obstructive lung disease. The device, designed for self-therapy, consists of a large-volume variable-frequency air-pulse delivery system and a nonstretchable inflatable vest worn by the patient. Pressure pulses are controlled by the patient and applied during expiration. Pulse frequency is tunable from 5 to 25 Hz. Maximum vest pressure is 39 mmHg (5.2 kPa), with patient-controlled vest inflation and deflation time constants of 0.5 s. Vest pressure increases from 28 mmHg (3.7 kPa) at 5 Hz to 39 mmHg (5.2 kPa) at 25 Hz. Preliminary clinical trials have shown the HFCC device to be more effective than standard chest physical therapy. The HFCC device yielded a mean volume of cleared mucus of 3.3 cc per session, compared with 1.8 cc for a conventional therapy session.
作者研发了一种高频胸部按压（HFCC）设备，以帮助阻塞性肺病患者清除黏液。该设备专为自我治疗设计，由一个大容量可变频率空气脉冲输送系统和患者穿戴的不可拉伸充气背心组成。压力脉冲由患者控制，并在呼气时施加。脉冲频率可在5至25赫兹之间调节。背心最大压力为39毫米汞柱（5.2千帕），患者可控制背心的充气和放气时间常数为0.5秒。背心压力从5赫兹时的28毫米汞柱（3.7千帕）增加到25赫兹时的39毫米汞柱（5.2千帕）。初步临床试验表明，HFCC设备比标准胸部物理治疗更有效。HFCC设备每次治疗清除的黏液平均量为3.3立方厘米，而传统治疗每次为1.8立方厘米。
