年龄校正 D-二聚体
If age ≥50 years, adjusted threshold = age × 10 ng/mL FEU; if age <50, conventional 500 ng/mL FEU teaching threshold.
计算器
说明
Age-adjusted D-dimer reduces false positives in older adults while maintaining sensitivity for VTE exclusion pathways.
局限
Assumes FEU units; pregnancy, inflammation, and malignancy elevate D-dimer; use institutional assay cutoffs.
仅供教学参考，不能替代临床诊断或治疗决策。