Application of Ultrasound Evaluation of Diaphragm Function in Guiding Ventilator Evacuation

Abstract

To investigate the clinical effect of the application of ultrasound evaluation of diaphragm function in guiding ventilator evacuation.Methods. 100 patients withventilator evacuation who were admitted to our hospital from March 2019 to June 2020 were selected as the study objects, and divided into the observation group and the control group, according to whether they succeeded in weaning. Among them, 50 patients succeeding in weaning were from the observation group; while 50 patients failing in weaning were from the control group. The Diaphragm Movement Degree (DMD) and Diaphragmatic Thickness at the End of Expiration (DTee), Diaphragmatic Thickness at the End of Inspiration (DTei) and Diaphragm Thickening Fraction (DTF), the right diaphragm displacement, diaphragm contraction velocity at 0 min, 5 min and 30 min of two groups as well as the ROC curve were all analyzed to predict weaning results of the ultrasound diaphragm index. Results.(1) There were no significant differences in Sequential Organ Failure Assessment (SOFA) score, Acute Physiology and Chronic Health Evaluation II (APACHE II) score, ventilator ventilation time and oxygenation index before weaning between the two groups ( T=0.14,0.03, 0.04, 0.59, P=0.89, 0.97, 0.56). (2) Left DMD (18.59±2.96) mm, Right DMD (19.86±2.94) mm, Left DTei (2.69±0.16) mm, Right DTei (2.81±0.31) mm, Left DTee (1.93±0.11) mm, Right DTee (1.92±0.16) mm, Left DTF (0.40±0.11) mm and Right DTF (0.47±0.09) mm in the observation group were significantly higher than Left DMD (13.05±3.16) mm, Right DMD (13.13±3.63) mm, Left DTei (2.16±0.34) mm, Right DTei (2.18±0.39) mm, Left DTee (1.92±0.16) mm, Right DTee (1.68±0.24) mm, Left DTF (0.25±0.06) mm and right DTF (0.27±0.07) mmin the control group, T = 9.05, 10.19, 9.97, 8.94, 6.93, 5.88, 8.46, 12.40,P=0.00，0.00，0.00，0.00，0.00，0.00，0.00，0.00, with statistical significance. (3) The ROC curve showed that left and right DMD, left and right DTei, left and right DTee as well as left and right DTF can be used to predict the success of weaning. Conclusion. In the guidance of ventilator evacuation, the application of ultrasound evaluation of diaphragm function can effectively evaluate the timing of weaning, and played a positive role in improving the success rate of weaning.