|Description||Neurotransmittere metabolites. CONTACT CLINICAL BIOCHEMISTRY BEFORE CARRYING OUT THIS TEST. Three samples are needed - Tube 1 - 0.5 mL for HVA & 5HIAA. Tube 2 - 0.5 mL. Tube 3 (with preservative - DTE DETAPAC) - 1.0 mL for Pterin analysis. Collect tubes and collection instructions from Biochemistry on day of procedure.|
|Interpretation||Reference intervals are age related for HVA and 5HIAA. HVA:5HIAA ratio - 1.0-3.7. Neopterin 7 - 65 nmol/L. Dihydrobiopterin <0.4 - 13.9 nmol/L.
|Collection Conditions||The samples should be sent to the Laboratory on dry ice as they MUST be frozen at the bedside. CAUTION - pterin cannot be measured on blood-stained CSF samples. Sample tubes(x3) to be collected form the laboratory.|
|Min. Vol||See additional requirements|
|Freq.||Referred to external laboratory|
|Ref. Range (Male)|| |
|Ref. Range (Female)|| |
|Ref. Range (Paed)|| |
|Ref. Range Notes||Reference intervals are age related for HVA & 5HIAA. HVA:5HIAA ratio 1.0-3.7. Neopterin 7-65 nmol/L. Dihydrobiopterin <0.4-13.9 nmol/L.|
|Units|| - Not Defined -|
|IP Acute TAT||At least 4 weeks|
|IP Routine TAT||At least 4 weeks|
|GP Acute TAT||At least 4 weeks|
|GP Routine TAT||At least 4 weeks|
|Turnround Comment||Prof Simon Heales (GOS/NAT):firstname.lastname@example.org|
Originally edited by : . Review due on 17/10/2017. Published By on 17/10/2017.