A subclavian intravenous line was replaced by a larger catheter in pulmonary artery or pulmonary wedge studies in 250 cases. This was accomplished by inserting a guidewire through the catheter to be removed and using it as a guide for introduction of the larger catheter. With careful attention to technical detail, complications have been minimal.
Rodman GH, Civetta JM. Bedside Pulmonary Artery Catheterization: Simplification of Technique. Arch Surg. 1974;109(6):840–841. doi:10.1001/archsurg.1974.01360060106031
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