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To avoid unnecessary X-ray examinations for confirming the correct placement of a central venous catheter and ruling out complications the following two criteria have to be met: 1) Confirmation of the correct placement in the vena cava, 2) Exclusion of pneumothorax and haemothorax. The latter can be accomplished using ultrasound [1], [2]. To prove the correct placement in the vena cava an ECG based approach has been suggested. Since this is only reliable with sinus rhythm patients with atrial fibrillation pose a problem. The following approach offers a safe alternative method in this population.

Feasibility of ultrasound-based identification of correct central venous access using two acoustic windows