Correlation Analysis of Inferior Vena Cava Diameter and Its Variability in Different Body Positions
Objective To explore whether a 30° bed head elevation position can replace a supine position as a position for ultrasound measurement of inferior vena cava diameter(IVCD)to reflect blood volume.Methods A total of 60 severe patients from the Department of Intensive Care Unit of The Second People's Hospital of Jintang County from January 2021 to January 2023 were selected.The maximum,minimum and variability of IVCD were measured by ultrasound in both supine and bed head elevated 30° position.Student's t-test was used to compare the difference in IVCD between the two positions,and intra-class correlation coefficient(r)were used for consistency evaluation.Results There was no statistical significance in comparing the mean minimum[(1.43±0.47)cm],mean maximum[(1.76±0.46)cm],and mean variability[(26.46±18.40)％]of IVCD in the supine position with the mean minimum[(1.46±0.43)cm],mean maximum[(1.78±0.43)cm],and mean variability[(24.38±16.60)％]of IVCD in the 30° bed head elevation position(P＞0.05).The intra-class correlation coefficient showed excellent consistency in the minimum(r=0.932)and maximum(r=0.915)of IVCD for the two positions,and consistency in the variability(r=0.728).Further subgroup analysis yielded similar results.Conclusion The 30° bed head elevation position may be used as an alternative to the supine position for IVCD measurement during assessment of blood volume in severe patients,and has certain clinical application value.
万方数据
维普
