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TRH stimulation test. Prior to the availability of sensitive TSH assays, thyrotropin releasing hormone (TRH) stimulation tests were relied upon for confirming and assessing the degree of suppression in suspected hyperthyroidism. Typically, this stimulation test involves determining basal TSH levels and levels 15 to 30 minutes after an intravenous bolus of TRH.
Tip, ring, sleeve (TRS) connectors are electrical plugs and sockets that have three distinct contacts that are capable of conducting analog signals. These three conductive elements consist of the tip of the plug, a ring around the center of the plug, and the outer sleeve at the base.