Figure 2From: Impact of real-time ultrasound guidance on complications of percutaneous dilatational tracheostomy: a propensity score analysisAnterior tracheal wall puncture on ultrasound. Axial view of the trachea demonstrating the visualized part of the needle at the anterior tracheal wall; Th-Is, thyroid Isthmus; T-R, tracheal Ring.Back to article page