Peripheral deiodinase activity [Moles/time] in Serum or Plasma by Calculated.SPINA

Per deiod act SerPl Calc SPINA-sRate

Definition

The sum activity of peripheral deiodinases (GD, also referred to as deiodination capacity or total deiodinase activity) is the maximum amount of triiodothyronine (T3) produced per time-unit by deiodinases outside the central nervous system. The structure parameter inference approach (SPINA) uses Michaelis-Menten functions and pharmakokinetic data to estimate GD under conditions of substrate saturation. One calculation is based on peripheral free T3 and free T4 values, and an alternate calculation uses peripheral total T3 and free T4. GD calculated using the SPINA approach is also known as SPINA-GD. SPINA-GD may be useful in diagnosing thyroid conditions that are difficult to diagnose based on traditional thyroid function studies, such as subclinical forms of thyroid failure, hypothalamic or pituitary dysfunction, and non-thyroidal illness syndrome. [PMID: 27375554] Thyroid secretory function by SPINA, called SPINA-GT, is a related result [LOINC: 82368-2].

Activ; Actvty; Calc; Calc SPINA; Calculation; Chemistry; Deiodination capacity; Movements; Per deiod act; Periph; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SPINA-GD; SR; sRate; Substance Rate; Total deiodinase activity