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[Controlled respiration with a new "jet-ventilator" in the microsurgery of the larynx. An experimental study on dogs (author's transl)].

To combine the open jet-ventilation system with the security of the closed respiration we developed a new "jet-ventilator". Using a modification of the Carden-tube when we closed the upper part of the intratracheal tube, we had to remove the air by suction during the expiration time. With a pressure-analizer and transducer we could prevent negative and high pressure in the trachea. In experimental studies on six dogs we saw good blood gas analyzers as well as good circulatory parameters. With this method we were able to observe ventilation between eight and nine hours.