• J Fichter, C Stahl, B Meiners, and G W Sybrecht.
• Abteilung Innere Medizin V, Universitätskliniken des Saarlandes, Homburg/Saar.
• Med Klin. 1996 Apr 12;91 Suppl 2:70-1.

BackgroundProportional assist ventilation (PAV), a new mode for assist ventilation, allows the patient not only to trigger the ventilator but enables him to keep his breathing pattern. The basis of PAV is a positive feed back between patient and ventilator.Patients And MethodPAV was applied in 6 patients, who were under long-term ventilation and who were stable. The ventilator was adjusted to compensate for the endotracheal tube, different parts between 90 and 40% of resistance and elastance were assisted. Airway pressure, flow and tidal volume were measured. PAV was compared with pressure support ventilation (PSV).ResultNo difference in blood gases were found in PAV as compared to PSV. Airway pressure were lower in PAV than in PSV (10.4 +/- 3.3 cm H2O vs. 18.8 +/- 5.9 cm H2O in PSV). Breathing frequency was higher (22.4 +/- 8.1 vs. 15.8 +/- 5.9 in PSV).ConclusionThe higher breathing frequencies in PAV were associated with the underlying diseases and resulted in a better synchronisation with the respiratory center output.

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