RESUMO
Objective:To investigate the diagnostic value of motility index (MI), time averaged mean velocity (TAMV) and blood lactic acid level for acute gastrointestinal injury(AGI) in critical patients.Methods:Patients were enrolled from January 2018 to June 2019 in Department of Emergency Intensive Care Unit, the People's Hospital of Guangxi Zhuang Autonomous Region. Patients were divided into the AGI group and control group according to whether there was acute gastrointestinal injury. Patients’ general information and AGI characteristics were assessed. Area under the receiver operating characteristic (ROC)curve was used to analyze the predictive value of MI, blood lactic acid level and TAMV, or combination on the occurrence of AGI.Results:A total of 73 critical patients were enrolled including 45 patients with AGI and 28 without. Logistic regression analysis found that MI ( OR=2.618, 95% CI: 1.214-5.646, P=0.014), TAMV( OR=1.483, 95% CI: 1.058-2.077, P=0.022), blood lactic acid level( OR=0.360, 95% CI: 0.002-0.865, P=0.040) at admission were independent risk factors for AGI. The sensitivity and specificity of MI, blood lactic acid level and TAMV in predicting AGl were 100% and 89.3%, respectively (AUC=0.982, Youden index=0.893). High blood lactic acid level and low MI and TAMV are independent risk factors for the development of AGI in critical patients. The predictive cut-off values are 4.44 for MI, 45.79 cm/s for TAMV and 5.03 mmol/L for blood lactic acid level. Conclusions:Combination of MI, TAMV and blood lactic acid level has apractical predictive value for AGI incriticalpatients