Asif Jalil, Khan Yaqoob, Mehreen Aslam, Muhammad Irfan Malik


Background: Fluid measurement is one of the critical and vital interventions in the treatment of postoperative patients and a slight delay in it may increase the complication of fluid overload or under-load that may have a worse outcome. The objective of this study was to estimate the fluid balance status in postoperative patients by central venous pressure and correlate it with vascular pedicle width and inferior vena cava

Materials & Methods: This was a single blinded cross-sectional comparison study done in surgical Critical care unit, Combined Military Hospital Rawalpindi from 3rd Oct 2021 to 3rd Jan 2022. Total 180 adult patients admitted to the surgical ICU were included in the study by purposive random sampling. Variables included in the study were age, gender, Central venous pressure, Vascular pedicle girth, and Inferior vena cava measurement. The correlations between the CVP, IVC diameter, and VPWs were determined by Pearson’s correlation. The p-value >0.05 was calculated as statistically significant. The SPSS version 20 was exercised for statistical analysis

Results: Total 180 participants were included in the study, 80% were male and 20% were female. The mean age of participants was 51.7 ± 9.5 years and BMI was 26 ± 3.5Kg/m2. CVP mean was 9.9 ± 6.4 cm (P<0.005) of water (-2 to 24 cmH2O). We also noted that 40% had low CVP (>6),44% had normal (7-14) while 16% had high CVP value (15-24). VPW value mean was 68mm±4.8 (P<0.005) while the IVC mean was 16.4±4.4. (P<0.005). The association of IVC-d and CVP values was 0.92 (p <0.005) which displayed a strong positive relationship while the association among CVP and VPW was 0.802 (p <0.005) which was also significant.

Conclusion: Bedside ultrasound measurements of IVC width are highly correlated with CVP and VPW, making them a useful tool for assessing intra-vessel fluid balance.


Central venous pressure; Fluid measurement; Fluid overload; Vascular pedicle width; Ultrasonography.

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