Evaluation of the effect of bedside ultrasound combined with joint movement protractor on preventing secondary ectopic PICC in extremely low birth weight infants
CUI Lulu, LI Pingping, SU Xin, JIN Ge
Chinese Journal of Nursing . 2025, (17): 2063 -2068 .  DOI: 10.3761/j.issn.0254-1769.2025.17.003