期刊
ANESTHESIA AND ANALGESIA
卷 126, 期 1, 页码 143-149出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1213/ANE.0000000000002192
关键词
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资金
- Clinical Trial Network of the European Society of Anaesthesiology
- National Heart, Lung, and Blood Institute [HL123438]
- National Institutes of Health [UM1 HL108724]
- NATIONAL HEART, LUNG, AND BLOOD INSTITUTE [R34HL123438, UM1HL108724] Funding Source: NIH RePORTER
BACKGROUND: In the 2014 PROtective Ventilation using HIgh versus LOw positive end-expiratory pressure (PROVHILO) trial, intraoperative low tidal volume ventilation with high positive end-expiratory pressure (PEEP = 12 cm H2O) and lung recruitment maneuvers did not decrease postoperative pulmonary complications when compared to low PEEP (0-2 cm H2O) approach without recruitment breaths. However, effects of intraoperative PEEP on lung compliance remain poorly understood. We hypothesized that higher PEEP leads to a dominance of intratidal overdistension, whereas lower PEEP results in intratidal recruitment/derecruitment (R/D). To test our hypothesis, we used the volume-dependent elastance index %E-2, a respiratory parameter that allows for noninvasive and radiation-free assessment of dominant overdistension and intratidal R/D. We compared the incidence of intratidal R/D, linear expansion, and overdistension by means of %E-2 in a subset of the PROVHILO cohort. METHODS: In 36 patients from 2 participating centers of the PROVHILO trial, we calculated respiratory system elastance (E), resistance (R), and %E-2, a surrogate parameter for intratidal overdistension (%E-2 > 30%) and R/D (%E-2 < 0%). To test the main hypothesis, we compared the incidence of intratidal overdistension (primary end point) and R/D in higher and lower PEEP groups, as measured by %E-2. RESULTS:E was increased in the lower compared to higher PEEP group (18.6 [16...22] vs 13.4 [11.0...17.0] cm H2OL -1; P < .01). %E-2 was reduced in the lower PEEP group compared to higher PEEP (-15.4 [-28.0...6.5] vs 6.2 [-0.8...14.0] %; P < .05). Intratidal R/D was increased in the lower PEEP group (61% vs 22%; P = .037). The incidence of intratidal overdistension did not differ significantly between groups (6%). CONCLUSIONS: During mechanical ventilation with protective tidal volumes in patients undergoing open abdominal surgery, lung recruitment followed by PEEP of 12 cm H2O decreased the incidence of intratidal R/D and did not worsen overdistension, when compared to PEEP 2 cm H2O.
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