• J Galán Serrano, J Correa López, R Tarradell Zamora, J Alvarez Escudero, M Moreno Bueno, and J M Villar Landeira.
• Servicio de Anestesiología, Hospital de la Santa Creu i Sant Pau.
• Rev Esp Anestesiol Reanim. 1991 Jul 1;38(4):265-7.

AbstractTransoesophageal echocardiography is a new technique that allows continuous and noninvasive assessment of cardiac function during surgery. More recently this technique is being used to detect the presence of external objects into the cardiac cavities. We report a case of Swan-Ganz catheter knotting confirmed by this echocardiography technique. He was a 57 year old male with previous history of arterial hypertension and ischemic heart disease who was scheduled for surgery because poor response to medical therapy. After anesthetic induction a thermodilution catheter was introduced percutaneously into the right internal jugular vein under continuous pressure monitoring from the distal catheter hole. In view of the difficulties in introducing the catheter into the pulmonary artery an intravascular catheter knotting was suspected and a bidimensional transesophageal echocardiogram confirmed the diagnosis. During extracorporeal circulation the catheter was withdrawn through a right auriculotomy. Monitoring with a Swan-Ganz catheter, as other invasive monitoring techniques, is followed by a certain degree of complications which should be avoided by a careful manipulation. Echocardiography is a valuable diagnostic procedure to identify the position of monitoring catheters into the cardiac cavities.

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