We have Granddar's latest blood work back. Blood was drawn on Sept 3
ACTH 44.9 (Cornell normals 9-35)
all the rest went to IDEXX
Glucose 101 (75-115)
Insulin 198 (29-179)
Free T4 .7 (.7-3.5)
T4 1.9 (1.0-3.8)
Granddar is on 1.5 mg pergolide and 2 tsp (24 mg) of Thyrol-L
Using the calculator, I get:
If the G:I ratio is less than 4.5, horse is severely IR. If the G:I ratio is between 4.5 and 10,
the horse is compensated IR. A G:I ratio greater than 10 is normal.
G:I ratio = *3.54*
A RISQI greater than .32 is normal. A RISQI less than .32 indicates IR. A RISQI less than .22
indicates severe IR.
Some horses will have a normal G:I ratio and RISQI but still be in danger if the glucose is
over 100. An MIRG greater than 5.6 will indicate IR in these cases.
IR Status = severe IR
Of course, this is where it says laminitis is imminent. The horse himself is doing well. He
feels good and is active and getting moderate exercise. His owner would like to see a bit
more weight on him, but the weight he has is well distributed---no fat pads. I'd say 850#
and a hair under 15 hands---body score of 4+. When he is turned out to run and play, he
is just stunning...you know, that Arab head and tail in the air thing;-)
His vet has suggested increasing his Thyrol-L just a little---to a rounded tsp. We haven't
asked him yet about increasing the pergolide.
So I am asking here. What about increasing the pergolide? He is close to normal and this
is thetime of the seasonal rise. His last two ACTHs have been within the normal range on
1.37 mg pergolide. We increased it just a bit when his coat didn't shed this summer the
way it should have...the thyroid seemed to help with that.
Any thoughts are most appreciated.