In more severe injuries, patients may complain that the knee feels unstable, or feel as though their knee may 'give out' or buckle. Symptoms of an MCL injury tend to correlate with the extent of the injury. MCL injuries are usually graded on a scale of I to III. Grade I MCL Tear. This is an incomplete tear of the MCL. The tendon is still in continuity, and the symptoms are usually minimal. Patients usually complain of pain with pressure on the MCL and may be able to return to their sport very quickly. Most athletes miss 1-2 weeks of play.
Medical Definition of flavin. : any of a class of yellow water-soluble nitrogenous pigments derived from isoalloxazine and occurring in the form of nucleotides as coenzymes of flavoproteins; especially : riboflavin.
Definition of LUMEN. 1. 2. : the bore of a tube (as of a hollow needle or catheter). 3. : a unit of luminous flux equal to the light emitted in a unit solid angle by a uniform point source of one candle intensity.