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Quality control validation for exogenous natural surfactant labeled with 99mTc
Gabriela P Calmanovici1, María J Salgueiro, Natalia M Leonardi
1Radioisotopes Laboratory, School of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina. gcalmano@ffyb.uba.ar
Journal of Nuclear Medicine Technology
|December 3, 2005
Summary
Quality control methods for technetium-99m labeled exogenous natural surfactant (99mTc-ENS) were validated for lung imaging. This ensures high-quality ventilation scintigraphy using this radiopharmaceutical.
Area of Science:
- Nuclear medicine
- Radiopharmacy
- Pulmonary imaging
Background:
- Exogenous natural surfactant (ENS) labeled with technetium-99m (99mTc) offers high lung specificity.
- This characteristic is crucial for obtaining high-quality images in ventilation scintigraphy.
Purpose of the Study:
- To evaluate and validate quality control methods for 99mTc-labeled ENS.
- To establish reliable methods for assessing the radiopharmaceutical's safety and efficacy.
Main Methods:
- Quality control involved assessing physical properties, pH determination, and radiochemical purity.
- Acetone/Whatman-1 paper chromatography was validated for radiochemical purity.
- Biodistribution studies in rats after intratracheal administration were used to estimate human biodistribution.
Main Results:
- Physical properties of the precursor and radiopharmaceutical were analyzed.
- pH determination methods were validated according to the United States Pharmacopeia.
- Chromatographic and biodistribution studies were validated for 99mTc-ENS assessment.
Conclusions:
- A validated method for 99mTc-ENS quality control and stability studies was established.
- The proposed methods adhere to international standards for radiopharmaceutical evaluation.
