Application of point-of-care ultrasound-guided tip navigation combined with visualised directional high-frequency linear array probe compression to improve the success rate of umbilical venous catheterisation in critical neonates: protocol of a multicentre randomised controlled trial in neonatal units
BMJ Open. 2025 Mar 22;15(3):e095017. doi: 10.1136/bmjopen-2024-095017. ABSTRACT INTRODUCTION: Conventional umbilical venous catheterisation (UVC) relies on ‘blind’ insertion without ultrasound guidance, resulting in low success …