Monitoring of Thoracopulmonary Compliance During High-Frequency Jet Ventilation: Theoretical and Practical Aspects

• Main Authors: M. B. Kontorovich, B. D Zislin, A. V. Chistyakov, A. V. Markov
• Format: Article
• Language: Russian
• Published: Russian Academy of Medical Sciences 2009-10-01
• Series: Obŝaâ Reanimatologiâ
• Subjects: high-frequency jet ventilation; static tho-racopulmonary compliance.
• Online Access: https://www.reanimatology.com/rmt/article/view/543

The paper presents the results of using a new version of a respirator for high-frequency jet ventilation (HFJV) that provides static thoracopulmonary compliance (Cst.) monitoring in real time. The performed studies on a lung model and clinical trials under HFJV in 18 patients undergoing thoracic operations for tuberculosis, tumors of the lung and mediastinum have yielded original algorithms to record auto PEEP and a point on the pressure curve corresponding to a zero flow (a rough plateau), which could solve the problem of compliance recording. The clinical tests of the developed algorithms permitted a new assessment of the physiological essence of thoracopulmonary compliance during HFJV. Unlike conventional ventilation in which the lower Cst indicates higher lung stiffness (more unventilated alveolae), in contrast this during HFJV suggests fewer unventilated alveolae, which is attended by reductions in the dead space and alveolar-capillary shunt and by an increase in arterial blood oxygen tension.