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江苏省原子医学研究所
收稿日期:1989-02-16,
纸质出版日期:1990-11-01
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国毓智, 谢天豪, 匡琴芳, 等. 不同分子量99mTc-Dx的比较及初步淋巴显像应用[J]. 核技术, 1990,13(11):676-680.
Yuzhi Guo, Tianhao Xie, Qinfang Kuang, et al. Lymphoscintgraphy with 99m Tc-dextran-comparison of different molecular weight and preliminary clinical studies[J]. Nuclear techniques, 1990, 13(11): 676-680.
对平均分子量为4、7、9和13.8万的
99m
Tc标记大分子右旋糖酐(Dx)的研究表明
99m
Tc-Dx从注射位置向血液的渗透率,
99m
Tc-Dx在肝、肾等脏器中的浓集随Dx平均分子量增大而降低.而在淋巴结中的药物浓度则随Dx的分子量增大而增加。平均分子量9万的
99m
Tc-Dx在大鼠腘淋巴结与肝、肾、血的放射性浓度之比,在注药后2h分别高达1924、938和6087。完全可以满足淋巴显像的要求。30例
99m
Tc-Dx-90临床试用证明:
99m
Tc-Dx淋巴显像具有显像速度快、图象清晰、非创伤性、使用方便等优点,是一个有前途的淋巴显像剂.
Four
99m
Tc-labelled dextrans with average molecular weights of 40000
70000
90000
and 138000 has been evaluated. The study of biodistribution and tracer kinetics in rats demonstrated that
99m
Tc-Dx (90) was much better than the others with high uptake of lymph nodes
low penetrating rate from injection site to blood
and excellent target/nontarget organ ratios. The preliminary clinical studies (in 20 normal and 10 patients) were also reported. Following interdigital injection of 0.5—1.0 ml Tc-99m-Dx (90) (about 57MBq)
it reached the knee
inguinal or axilla nodes in 5.0±1.2
10±2.0
and 15±3.0 min respectively. High quality imagings were obtained in all cases. It is concluded that
99m
Tc-Dx (90) is a very promising lymph system imaging agent.
E. Henze et al . , J. Nucl. Med . , 23 ( 1982 ), 923 .
国毓智 等 , 中华核医学杂志 , 4 ( 1984 ), 4 : 218 .
D. G. Garlick et al . , Am. J. Physiol , 219 ( 1970 ), 1595 .
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