Positive End-expiratory Pressure and Alveolar Recruitment for One Lung Ventilation

Effects of Positive End-expiratory Pressure and Alveolar Recruitment on the Oxygenation and Respiratory Mechanics During One-lung Ventilation in the Supine Position

Hypoxia frequently develops during one lung ventilation in the supine position.The objective of this article is to study the impact of preemptive alveolar recruitment and subsequent positive end expiratory pressure on arterial oxygenation and lung mechanics during one lung ventilation in the supine position in patients undergoing thoracic surgery .

outcome measures: respiratory parameters (Paw, Ppla, Compliance, Vd/Vt)and oxygenation parameters (PaO2, shunt fraction, Pa-AO2)

Inclusion Criteria:

• ASA I-II
• age: 20-75 years

Exclusion Criteria:

• moderate to severe impaired respiratory function,
• heart failure,
• patients' refusal