Canine TSH may be measured at 30 minutes as part of a TRH stimulation test in the diagnosis of secondary hypothyroidism. Normal dogs should increase cTSH by at least 0.4 ng/mL. Total T3 (TT3) â The analysis of TT3 is of little value in the diagnosis of hypothyroidism principally because of the high prevalence of cross-reacting T3 autoantibodies (T3AA) in hypothyroid dogs.
The forward (leading) edge of the sail is called the luff, which, in a mainsail, is parallel to the mast. The aft (back) edge of a sail is called the leech (also spelled leach), which is opposite the luff, and forms the hypotenuse of the triangle.
1 Sail head- The head of the sail is top of the triangle this is attached to a halyard (vertical line (rope)) that is used to haul the sail up.  Sail Tack - This is the bottom corner of the sail triangle forward. the tack is shackled to a point of the boat.