Abstract

BURITICA GAVIRIA, Edwin; ECHEVERRY BONILLA, Diego  and  OSPINA ARGUELLES, Diego. Effect of two cyclical alveolar recruitment maneuvers on different parameters of non-invasive microcirculatory monitoring in dogs. rev.udcaactual.divulg.cient. [online]. 2019, vol.22, n.1, e1150.  Epub June 30, 2019. ISSN 0123-4226.  https://doi.org/10.31910/rudca.v22.n1.2019.1150.

Alveolar recruitment maneuvers (ARM) are important in reversing the formation of perioperative atelectasis; however, its performance is subject to significant hemodynamic changes. The present study evaluated the effect of two cyclic alveolar recruitment protocols, by increasing positive end-expiratory pressure (PEEP), on three parameters of microcirculatory monitoring in 28 anesthetized dogs. Animals were randomly assigned to one of three groups, according to the ARM to be performed, thus: Group 1, short protocol (SP) recruited with PEEP of 10cmH2O; Group 2, long protocol (LP) recruited with PEEP of 20cmH2O; and Group 3, control protocol (CoP) ventilated with PEEP of 0cmH2O. For each maneuver, the central-peripheral temperature gradient (TG), capillary refill time (CRT) and pulse oximetry (SpO2) were evaluated, in four times namely: T1 (Pre-anesthesia), T2 (pre-recruitment), T3 (30 min post-maneuver) and T4 (60 min post-maneuver). In T2, CRT values showed a significant decrease (p<0.05), with respect to baseline time. Subsequently, in the T3, a significant statistical decrease of the TG for the SP group was evident compared to the other treatments; while in the T4 the CRT presented a significant decrease (p<0.05) for LP group versus the other treatments. It is suggested that under the conditions presented here, the protocol of ventilation with PEEP increments of up to 20cmH2O is the ARM of choice as it does not produce alterations of clinical importance in the microcirculatory parameters evaluated.

Keywords : anesthesia; anesthetic monitoring; mechanical ventilation; pulmonary atelectasis..

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