[New methods of artificial respiratory ventilation]

High frequency ventilation, a new nonconventional method, has been introduced into clinical practice also in Czechoslovakia, where mainly high frequency jet ventilation (HFJV) is being developed. The HFJ ventilator Best-2 (Konstrukta, Trencín) and Chirajet (Chirana, Stará Turá) which enable HFJV with a multijet generator are used. These equipments reduce inadvertent positive end expiratory pressure by means of an expiration jet and are so designed that Brychta's impulse and expulse regimen can be used to advantage at programmed lavage of the lungs and at selective ventilation of individual parts of the lungs. The paper presents the basic principles of HFJV as well as the author's experience in using this method of ventilation in experimental animals.