ArticlePloS one2024
Assessment of changes in intra-abdominal pressure and cardiac output induced by liver compression in healthy anesthetized spontaneously breathing dogs.
Article in PloS one, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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13 authors.
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Abstract
objectiveLiver compression (LC) has been proposed to predict fluid responsiveness in human pediatric patients. Because the evaluation of fluid responsiveness through LC depends on the mechanism of increased intra-abdominal pressure (IAP), understanding the impact of LC on IAP, cardiac output (CO), and respiratory parameters is essential. Thus, this study aimed to investigate the effects of LC on these parameters.
methodsThe present study used six healthy beagles. All dogs were anesthetized with isoflurane and allowed to breathe spontaneously in dorsal recumbency. After instrumentation, LC was performed at four different pressures in a sequential, non-randomized manner: (1) 10 mmHg, approximately half of the minimum value within the range; (2) 22 mmHg, a commonly used pressure within the range; (3) 44 mmHg, twice the pressure of the minimum value within the range; and (4) 60 mmHg, twice the pressure of the maximum value within the range. At each pressure, CO via transthoracic echocardiography, IAP, and cardiorespiratory parameters were measured before, during, and after LC.
resultsOverall, our results showed that the IAP was significantly increased at all pressures during LC (P < 0.001), yielding a linear correlation between LC pressure and IAP (P < 0.001; r² = 0.89). The maximum IAP during LC was 7 mmHg, and intra-abdominal hypertension was not induced. LC at 22 mmHg significantly increased the IAP by 1.7 mmHg, but did not significantly alter the CO or respiratory parameters.
conclusionsThis is the first study to evaluate the effects of LC on IAP, CO, and respiratory parameters in healthy, anesthetized, and spontaneously breathing dogs. Our findings indicate that applying LC with a commonly used pressure may have a low risk of inducing intra-abdominal hypertension and related complications. Further studies are required to explore the use of LC in various clinical settings.
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