TrixieStix
Senior Member
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From "Dysautonomia International":
This is an important abstract to share with your doctors if you are still looking for the "cause" of your dysautonomia. Ask your doctor to pull the full article. Researchers screened 195 patients with idiopathic small fiber neuropathy (SFN) for various blood tests that are used to help determine the cause of the SFN. 87% of these patients had some form of dysautonomia. 71% of patients had at least one abnormal blood test in a panel of 21 widely available tests used to screen for known causes of SFN (see the list in the comments below). The blood tests that were more likely to be positive in this population than in the general population were autoimmune related - thyroid stimulating hormone (TSH - too high and too low), Sjogren's (SS-A, SS-B), Celiac (IgA TTG), low complement C3 (associated with vasculitis and autoimmunity in general), high ESR, and high ANA (1:160 or more).
Diagnostic value of blood tests for occult causes of initially idiopathic small-fiber polyneuropathy. - PubMed - NCBI
https://www.ncbi.nlm.nih.gov/pubmed/27730378
This is an important abstract to share with your doctors if you are still looking for the "cause" of your dysautonomia. Ask your doctor to pull the full article. Researchers screened 195 patients with idiopathic small fiber neuropathy (SFN) for various blood tests that are used to help determine the cause of the SFN. 87% of these patients had some form of dysautonomia. 71% of patients had at least one abnormal blood test in a panel of 21 widely available tests used to screen for known causes of SFN (see the list in the comments below). The blood tests that were more likely to be positive in this population than in the general population were autoimmune related - thyroid stimulating hormone (TSH - too high and too low), Sjogren's (SS-A, SS-B), Celiac (IgA TTG), low complement C3 (associated with vasculitis and autoimmunity in general), high ESR, and high ANA (1:160 or more).
Diagnostic value of blood tests for occult causes of initially idiopathic small-fiber polyneuropathy. - PubMed - NCBI
https://www.ncbi.nlm.nih.gov/pubmed/27730378