Behavioral cue-based oral feeding pattern means that feeders make decisions and provide different oral feeding strategies through continuous and dynamic evaluation of the behavioral cues presented by premature infants. This paper reviewed the development background,development situation,theoretical basis,influencing factors and oral feeding readiness assessment,sucking quality evaluation,supporting strategy implementation method of behavioral cue-based oral feeding pattern for preterm infants in NICU. It aimed to provide the references to carry out the behavioral cue-based oral feeding pattern of premature infants at domestic NICU.

The PICC catheterization and post-catheterization nursing of 6 neonates with persistent left superior vena cava were conducted. Key points of care included：choose the right time to insert the catheter;the image data of neonates were analyzed retrospectively before catheterization;measure the length of body surface correctly;under the guidance of ultrasound, the tip of the PICC catheter was indwelled in the lower third of the persistent left superior vena cava;the use of PICC catheters should be closely observed,early identification of PICC-related complications and appropriate treatment;establish special case files to ensure the safe use of PICC in neonates with persistent left superior vena cava. Six cases of PICC were scheduled to be removed after 10-21 days of indwelling,no PICC-related complications occurred during the indwelling period.