Swan-Ganz CCOmbo V for Obtaining an Optimal Depth of Right Internal Jugular Venous Catheter

Swan-Ganz CCOmbo V for Obtaining an Optimal Depth of Right Internal Jugular Venous Catheter : A Prospective Observational Study

The investigators will perform a study to create formula for the optimal insertion depth of right internal jugular vein catheter.

Patients scheduled for cardiac surgery were studied.Determine the optimal insertion depth of right internal jugular vein catheter using Swan-Ganz Continuous Cardiac Output Thermodilutioon Cather (Swan-Ganz CCOmbo V).The investigators measure the distance between the insertion point and the junction between right atrium and superior vena cava using Swan-Ganz CCOmbo V.

Inclusion Criteria:

• Adult patient over 18 years of age undergoing mitral valve or/and tricuspid valve
• Surgery under general anesthesia, requiring Swan-Ganz Continuous Cardiac Output Thermodilutioon Cather (Swan-Ganz CCOmbo V) insertion through the right internal jugular vein.

Exclusion Criteria:

• A change in the mediastinal structure from previous neck surgery,thoracic surgery or cardiac surgery
• Extracardiac vascular anomaly
• Anatomical abnormality in neck and thorax
• Refusal to enrol