Related Experiment Videos
[Indirect articular lymphography using Tc 99m-labeled Dextran in animals].
M Albuquerque1, J Pedroso de Lima, A Cardoso
1Service d'Orthopédie et Traumatologie, Hôpitaux de l'Université de Coimbra, Portugal.
Summary
This study standardized articular lymphoscintigraphy using technetium-99m-labeled dextran in dogs. The tracer effectively visualized lymphatic drainage, proving useful for quantitative articular lymphatic drainage studies.
Area of Science:
- Nuclear Medicine
- Lymphatic System Imaging
- Experimental Surgery
Background:
- Standardization of articular lymphoscintigraphy is needed.
- Current methods may lack quantitative accuracy for lymphatic drainage.
Purpose of the Study:
- To standardize articular lymphoscintigraphy.
- To evaluate technetium-99m-labeled dextran as a tracer for quantitative articular lymphatic drainage studies.
Main Methods:
- Experimental research conducted on 14 dogs.
- Intra-articular injection of 2.5 mCi 99mTc-labeled dextran (P.M. = 70,000) in the ankle.
- Collection of blood samples and tissue/organ aliquots post-necropsy.
Main Results:
- Good scintigraphic images of the lymphatic system were obtained.
- 99mTc-labeled dextran demonstrated utility for quantitative articular lymphatic drainage studies.
- Drainage lymph node activity was 152x higher than kidney activity; popliteal ganglion was 8929x more active than blood.
Conclusions:
- Technetium-99m-labeled dextran (70,000 MW) is a safe and effective tracer for articular lymphoscintigraphy in humans.
- This tracer enables quantitative studies of articular lymphatic drainage.
- Facilitates the expansion of lymphoscintigraphy applications to joint studies.