Why the study?
Does the sampling location affect the measurement of respiratory variation in IVC collapse in healthy volunteers?
Does the sampling location affect the measurement of respiratory variation in IVC collapse in healthy volunteers?
Clinicians should avoid measuring percentage collapse of the IVC at the junction of the right atrium and IVC, as it yields results that are not equivalent to other standard measurement sites.
IVC collapse at the RA junction differs from other sites in volunteers; leaves open optimal measurement location for clinical volume assessment.
Measurements of respiratory variation in IVC collapse in healthy volunteers are equivalent at the level of the left renal vein and at 2 cm caudal to the hepatic vein inlet. Measurements taken at the junction of the right atrium and IVC are not equivalent to the other sites; clinicians should avoid measuring percentage collapse of the IVC at this location.
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Wallace et al. (2009) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: