J Korean Orthop Assoc.  2016 Aug;51(4):315-319. 10.4055/jkoa.2016.51.4.315.

Ultrasonographic Measurements of the Intramuscular Fluid Collection Using a Phantom: A Preliminary Study

• Lee HJ
• Ahn SM
• Ryu JA
• Park TS

• KMID: 2348638
• DOI: http://doi.org/10.4055/jkoa.2016.51.4.315

Abstract

PURPOSE
The purpose of this study is to check the intermuscular fluid collection in a phantom using ultrasound after comparison with the original injected volume of gel and to evaluate interobserver reliability.
MATERIALS AND METHODS
One orthopedic surgeon injected ultrasonographic gel into the muscle of slaughtered cow meat using a syringe and needle, and recorded the injected volume. The injected volume of gel ranged from 1 ml to 5 ml, and total number of trials was 30 times. The volume was calculated using ultrasound by two experienced radiologists. The ultrasonographic measured volme was assessed and interobserver variability was measured.
RESULTS
The mean ultrasonographic measured volume was 71.35% of the original injected volume of gel. Thus, the measured volume using ultrasound showed a tendency to underestimate the injected volume into the muscle. For evaluation of interobserver reliability, interclass correlation using SPSS and consistency using Bland and Altman plot were calculated. Interclass correlation was 0.95, and Bland and Altman plot showed that the differences of mean volume measured by two observers were within ±1.96 standard deviation over 95%. Therefore, it showed good interoberver reliability.
CONCLUSION
Ultrasonographic measurement of the intramuscular fluid collection in a phantom showed mean 71.35% of the original injected volume of gel, and it tended to be underestimated in proportion to the increased volume of intermuscular gel. This study showed good interobserver reliability.

Keyword

intermuscular gel collection; measurement; interobserver reliability; ultrasonography

MeSH Terms

Meat
Needles
Observer Variation
Orthopedics
Syringes
Ultrasonography

Figure

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  Figure 1 Measurement of the ultrasonographic gel using ultrasonography. The ultrasonographic gel in the muscle of slaughtered cow meat was measured in the sagittal plane with longitudinal and antero-posterior diameter (A), and the transverse plane with transverse diameter (B).

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  Figure 2 Measurement accuracy of injected volume of ultrasonographic gel.

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  Figure 3 Analysis of interobserver reliability by Bland and Altman plot.4) SD, standard deviation.

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