Orderable Name MSUSC Branched-Chain Amino Acids, Self-Collect, Blood Spot
Necessary Information
Patient's street address, city, state, ZIP (postal) code, country, and home phone are required (post-office [PO] boxes are not acceptable delivery locations).
Specimen Required
Supplies: Blood Spot Collection-Self Collect (T858)
Container/Tube: Blood Spot Self Collection Card
Specimen Volume: 2 Blood spots
Collection Instructions:
1. Order test each time the patient is to collect a dried blood specimen at home and mail the specimen directly to Mayo Clinic Laboratories.
2. Order should be placed a minimum of 3 days prior to desired date of collection.
3. Enter patient's address information for each order created, including street address (post-office [PO] boxes are not acceptable delivery locations), city, state abbreviation, ZIP (postal) code, country, and home phone number.
4. For each order, the Blood Spot Collection-Self Collect kit will be mailed directly to the patient for self-collection (delivery to a PO box will not occur).
5. For more information on how to collect blood spots, see the following:
-How to Collect Dried Blood Spot Samples via fingerstick.
-Blood Spot Collection Instructions-Fingerstick
-Blood Spot Collection Instructions-Fingerstick-Spanish
Useful For
Monitoring patients with maple syrup urine disease using specimens collected at home
Method Name
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Portions of this test are covered by patents held by Quest Diagnostics
Specimen Type
Whole bloodSpecimen Minimum Volume
1 Blood spot
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Whole blood | Ambient (preferred) | 59 days | FILTER PAPER |
Frozen | 59 days | FILTER PAPER | |
Refrigerated | 59 days | FILTER PAPER |
Reject Due To
Blood spot specimen that shows serum rings or has multiple layers | Reject |
Reference Values
Allo-isoleucine: <2 nmol/mL
Leucine: 35-215 nmol/mL
Isoleucine: 13-130 nmol/mL
Valine: 51-325 nmol/mL
Day(s) Performed
Monday through Friday
Report Available
2 to 4 daysCPT Code Information
0381U
Forms
If not ordering electronically, complete, print, and send a Biochemical Genetics Test Request (T798) with the specimen.