Given the size of the patient, having a sheath that is > 6 F in the brachial artery would pose significant risk. Also, due to the absence of a nub, other larger CTO devices would be difficult to use due to a lack of pushability by the supporting catheter or device.
Bee pollen is the pollen ball that has been packed by worker honeybees into pellets. Bee bread is the bee pollen with added honey and bee secretions and stored in brood cells, chambers of wood and mud created by female ground-nesting bees.
It comes from the pollen nectar from the flowers (the dusty stuff that you see on blossoms in the spring). Pollen is the male seed of flowers. It is required for the fertilization of the plant. See my article on Bee Pollen Facts for more on how it goes from the flower to the bottle.