Is Technetium Tc 99m Sulfur Colloid Safe in Breastfeeding

I am a breastfeeding mother and i want to know if it is safe to use Technetium Tc 99m Sulfur Colloid? Is Technetium Tc 99m Sulfur Colloid safe for nursing mother and child? Does Technetium Tc 99m Sulfur Colloid extracts into breast milk? Does Technetium Tc 99m Sulfur Colloid has any long term or short term side effects on infants? Can Technetium Tc 99m Sulfur Colloid influence milk supply or can Technetium Tc 99m Sulfur Colloid decrease milk supply in lactating mothers?

Information in this record refers to the intravenous use of technetium Tc 99m sulfur colloid as a diagnostic agent. The International Commission on Radiological Protection recommends that breastfeeding need not be interrupted after administration technetium Tc 99m sulfur colloid.[1] However, the United States Nuclear Regulatory Commission recommends that breastfeeding should be interrupted for 6 hours after administration of technetium Tc 99m sulfur colloid in a dose of 370 MBq (12 mCi) to a nursing mother.[2] The mother can nurse the infant just before administration of the radiopharmaceutical. During the period of interruption, the breasts should be emptied regularly and completely. If the mother has expressed and saved milk prior to the examination, she can feed it to the infant during the period of nursing interruption.[3][4][5] The milk that is pumped by the mother during the time of breastfeeding interruption can either be discarded or stored refrigerated and given to the infant after 10 physical half-lives, or about 60 hours, have elapsed. Mothers need not refrain from close contact with their infants after usual clinical doses;[6] but following injection doses greater than 370 MBq (10 mCi), patients should minimize close contact with infants for 6 hours.[7] Mothers concerned about the level of radioactivity in their milk could ask to have it tested at a nuclear medicine facility at their hospital. When the radioactivity is at a safe level she may resume breastfeeding. A method for measuring milk radioactivity and determining the time when a mother can safely resume breastfeeding has been published.[8] For nursing mothers who work with Tc 99m substances in their workplace, there is no need to take any precautions other than those appropriate for general radiation protection.[9]