The "rapid atrial swirl sign" for assessing central venous catheters: Performance by medical residents after limited training.
Peter KorstenEirini MavropoulouSusanne WienbeckDavid EllenbergerDaniel PatschanMichael ZeisbergRadovan VaskoBjörn TampeGerhard A MüllerPublished in: PloS one (2018)
The study was registered with www.clinicaltrials.gov (NCT02661607).