Studies of height-BMI binding model in predicting the optimal length of the front opening PICC

Abstract

Objective \nTo explore the correlation between PICC optimal prediction length and height, body mass index, and provide a more accurate prediction method for PICC depth management. \n \n \nMethods \nA total of 100 patients with PICC catheterization in January 2018 were selected for self-controlled study, and two different in vitro measurement methods were used for the same patient at the same time.Traditionally, the Rountree method is used to obtain the predicted length from the puncture point to the right sternoclavicular joint and back down to the third intercostal space (A). This group of methods is used only for measurement and data recording as A control.The experimental measurement method adopted the modified method, that is, the length from the puncture point to the right sternoclavicular joint, plus the predicted length based on the pre-addition of 6-10cm according to the height and body mass index (B). This group of methods was applied to the actual catheterization.The ideal length of the catheter was determined by chest radiograph after catheterization (C).The length of the catheter is predicted by traditional Rountree methods (A) 42.0 ± 2.867cm, experimentally measured (B) 40.30± 2.435cm, and idealized (C)39.81± 2.411cm.Kruskal-wallis H test and analysis of three lengths of data A, B and C were performed, and the correlation between height, body mass index and PICC catheter length was compared through multiple linear regression analysis. \n \n \nResults \nthe length predicted by the experimental method was closer to the ideal length (P=0.657), and the regression model had statistical significance, F(2,97) =36.931, P<0.01, and adjusted, R2=0.421. The included height and body mass index (BMI) were statistically significant in predicting ideal catheter length (P<0.05). \n \n \nConclusions \nThe length of the catheter was predicted from the puncture point to the right sternoclavicular joint plus 6-10cm according to the height and body mass index, which was closer to the ideal length. \n \n \nKey words: \nMeasurement;\xa0PICC;\xa0Height;\xa0Body mass index