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Abstract
Purpose
The purpose of this study was to compared two methods for measuring fluid intake and to assess the most effective method.
Methods
Data from 44 hospitalized patients with chronic kidney disease was analyzed. Two methods were used. The liquid method is to measure the daily intake of water in the form of pure water or some other beverage and IV fluid, the liquid-solid method is to measure the daily intake of water which enters by the oral route and IV fluid.
Results
The daily intake of fluid was 1483.10mL and 2245.99mL respectively. The fluid output was 1883.72 mL. The Intra-Class Correlation (ICC) between the liquid method and the liquid-solid method and fluid output was 0.64 and 0.69, respectively. The correlation between differences of fluid in two methods and body weight change was r=.47 (p<.001) and r=.56 (p<.001), respectively.
Conclusion
The results of this study suggest that there are no difference between the two measuring methods as to reflecting the most close value to fluid output. And the difference between intake and output by two methods is correlated with body weight change. Therefore, it can be suggested that the either method could be useful as patients' fluid intake measurement.
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Table 1.
General and Disease-related Characteristics of the Participants (N=44)
Table 2.
Comparison of Amount of Fluid Intake and Output between Two Different Methods (N=44)
| Methods | Amount of fluid intake, mL | Amount of fluid output, mL |
|---|---|---|
| M±SD | M±SD | |
| Liquid method | 1,483.10±808.67 | 1,883.72±865.81 |
| Liquid-solid method | 2,245.99±873.42 | |
| Difference | 762.89±64.75 |
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