3D Biplane vs Conventional 2D Ultrasound Guided Internal Jugular VEin caNnulation in CardiotHoracic surgerY Patients

Central venous catheters (CVC) are frequently placed in patients who are scheduled for cardiothoracic surgery (ICU). Ultrasound (US) guidance has consistently shown to not only improve success rate of procedures, but also to decrease complications with most benefit for the jugular vein. However, serious adverse events still occur despite US guidance Conventional two dimensional ultrasound (2D US) guided access if performed in either the short axis or long axis view, with both approaches having their own limitations. Using short axis view, the operator is never certain of the position of the needle tip as the shaft of the needle is not distinguishable from the tip in this view. Structures not (yet) visible in the US screen can already be punctured, or a vessel can be entered at a different position than preferred. A possible mechanism through which carotid artery puncture can happen is the posterior wall puncture4.

For long axis view, with proper technique the needle is viewed entirely during the procedure. However, this requires extensive experience and the overview of surrounding structures is lost.Multiple attempts at improving US guided venous access have been tried, such as oblique visualization or alternating short and long axis views but those approaches still have their shortcomings.

Three dimensional ultrasound (3D US) has a theoretical advantage of increased anatomical awareness, but evidence of improvement in needle based procedures is scarce.

Recently, a new 3D US probe is introduced which can address the above mentioned limitations of 2D US for access procedures.

The investigators hypothesize that this superior three dimensional awareness can improve needle placement during central venous catheterization, increasing success rates and potentially decreasing complications.