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Effects of volatile and intravenous anesthesia on the alveolar and systemic inflammatory response in thoracic surgical patients.

Abstract：

BACKGROUND:One-lung ventilation (OLV) results in alveolar proinflammatory effects, whereas their extent may depend on administration of anesthetic drugs. The current study evaluates the effects of different volatile anesthetics compared with an intravenous anesthetic and the relationship between pulmonary and systemic inflammation in patients undergoing open thoracic surgery. METHODS:Sixty-three patients scheduled for elective open thoracic surgery were randomized to receive anesthesia with 4 mg · kg⁻¹ · h⁻¹ propofol (n = 21), 1 minimum alveolar concentration desflurane (n = 21), or 1 minimum alveolar concentration sevoflurane (n = 21). Analgesia was provided by remifentanil (0.25 μg · kg⁻¹ · min⁻¹). After intubation, all patients received pressure-controlled mechanical ventilation with a tidal volume of approximately 7 ml · kg ideal body weight, a peak airway pressure lower than 30 cm H₂O, a respiratory rate adjusted to a Paco2 of 40 mmHg, and a fraction of inspired oxygen lower than 0.8 during OLV. Fiberoptic bronchoalveolar lavage of the ventilated lung was performed immediately after intubation and after surgery. The expression of inflammatory cytokines was determined in the lavage fluids and serum samples by multiplexed bead-based immunoassays. RESULTS:Proinflammatory cytokines increased in the ventilated lung after OLV. Mediator release was more enhanced during propofol anesthesia compared with desflurane or sevoflurane administration. For tumor necrosis factor-α, the values were as follows: propofol, 5.7 (8.6); desflurane, 1.6 (0.6); and sevoflurane, 1.6 (0.7). For interleukin-8, the values were as follows: propofol, 924 (1680); desflurane, 390 (813); and sevoflurane, 412 (410). (Values are given as median [interquartile range] pg · ml⁻¹). Interleukin-1β was similarly reduced during volatile anesthesia. The postoperative serum interleukin-6 concentration was increased in all patients, whereas the systemic proinflammatory response was negligible. CONCLUSIONS:OLV increases the alveolar concentrations of proinflammatory mediators in the ventilated lung. Both desflurane and sevoflurane suppress the local alveolar, but not the systemic, inflammatory responses to OLV and thoracic surgery.

journal_name

Anesthesiology

journal_title

Anesthesiology

authors

Schilling T,Kozian A,Senturk M,Huth C,Reinhold A,Hedenstierna G,Hachenberg T

doi

10.1097/ALN.0b013e318214b9de

subject

Has Abstract

pub_date

2011-07-01 00:00:00

pages

65-74

issue

eissn

0003-3022

issn

1528-1175

journal_volume

115

pub_type

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Effects of volatile and intravenous anesthesia on the alveolar and systemic inflammatory response in thoracic surgical patients.