We have read with great interest the article by Hou et al.1  in the May issue of Anesthesiology. They used laser-assisted ultrasound guidance to project the path of the target artery onto the skin surface, improving the speed and the first-attempt success rate of radial artery cannulation in children less than 2 yr old.1  Although their findings have potential clinical implications, we observed several unaddressed issues in their study.

First, the authors assert that using this method leads to decreased time to success during the first attempt (31 vs. 46 s), second attempt (32 vs. 49 s), and overall arterial puncture (32 vs. 48 s), indicating improved efficiency and time savings compared to traditional ultrasound-guided cannulation. However, it is worth noting that preparing and setting up this laser device must take time. Although the authors stated that the position time and preparation time of...

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