Minerva Anestesiologica 2020 Dec 10

DOI: 10.23736/S0375-9393.20.14797-7

Copyright © 2020 EDIZIONI MINERVA MEDICA

lingua: Inglese

PEEP in thoracic anesthesia: PROS and CONS

Denise BATTAGLINI ¹, Lorenzo BALL ^{1, 2}, Jakob WITTENSTEIN ³, Edmond COHEN ⁴, Marcelo GAMA de ABREU ^{3, 5}, Paolo PELOSI ^{1, 2} ✉

¹ Anesthesia and Intensive Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neuroscience, Genoa, Italy; ² Department of Surgical Science and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy; ³ Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Therapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany; ⁴ Anesthesia and Thoracic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA; ⁵ Outcomes Research Consortium, Cleveland, OH, USA

Protective ventilation includes a strategy with low tidal volume, Plateau pressure, driving pressure, positive end-expiratory pressure (PEEP), and recruitment maneuvers on the ventilated lung. The rationale for the application of PEEP during one-lung ventilation (OLV) is that PEEP may contribute to minimize atelectrauma, preventing airway closure and alveolar collapse and improving the ventilation/perfusion to the ventilated lung. However, in case of high partial pressure of oxygen the application of PEEP may cause increased pulmonary vascular resistance, thus diverting blood flow to the non-ventilated lung, and worsening ventilation/perfusion. Further, PEEP may be associated with higher risk of hemodynamic impairment, increased need for fluids and vasoactive drugs. Positive effects on outcome have been reported by titrating PEEP according to driving pressure, targeted to obtain the optimum respiratory as well as pulmonary system compliance. This may vary according to the method employed for titration and should be performed individually for each patient. In summary, the potential for harm combined with the lack of evidence for improved outcome suggest that PEEP must be judiciously used during OLV even when titrated to a safe target, and only as much as necessary to maintain an appropriate gas exchange under low protective tidal volumes and driving pressures.

KEY WORDS: PEEP; Thoracic surgery; OLV; One-lung ventilation; Protective ventilation