The regression formulae to estimate the length of catheter were calculated from the anterior median line by means of regression analysis.
插管长度与前正中线相关回归方程式为：肠系膜上动脉（?）
The regression formulae to estimate the length of catheter were calculated from the anterior median line by means of regression analysis.
插管长度与前正中线相关回归方程式为：肠系膜上动脉（?）
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