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Test Code PTEM Platelet Transmission Electron Microscopic Study, Whole Blood

Useful For

Diagnosing platelet disorders

Genetics Test Information

This test is indicated for assessing platelet ultra-structural abnormalities in congenital and acquired platelet disorders.

Reporting Name

Platelet TEM, B

Specimen Type

Whole Blood ACD


Shipping Instructions


Send specimen Monday through Wednesday.

 

Specimens must be received in testing laboratory within 72 hours of collection. Ship specimen overnight in an Ambient Shipping Box-Critical Specimens Only (T668) following the instructions in the mailer.



Necessary Information


Platelet Esoteric Testing Patient Information is required. Testing may proceed without the patient information, however, the information aids in providing a more thorough interpretation. Ordering providers are strongly encouraged to fill out the form and send with the specimen.



Specimen Required


Patient Preparation: Fasting is preferred but not required. 

Supplies: Ambient Shipping Box-Critical Specimens Only (T668)

Collection Container/Tube:

Preferred: Yellow top (ACD, solution B)

Acceptable: Yellow top (ACD, solution A)

Specimen Volume: 6 mL

Collection Instructions: Send whole blood specimen in original tube. Do not aliquot.


Specimen Minimum Volume

3 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Whole Blood ACD Ambient 72 hours

Reject Due To

Gross hemolysis Reject
Gross lipemia OK

Reference Values

Mean dense granules/platelet: ≥1.2

Supportive Data

Extensive validation studies with normal donors and known patient samples were performed. A total 111 normal donor platelet samples were assessed to establish the baseline. Of the 10 known patient samples, 6 were from patients with Hermansky-Pudlak syndrome, 2 patients had gray platelet syndrome, 1 had MYH9 variant-associated platelet disorder, and 1 had Paris-Trousseau/Jacobson syndrome.

Day(s) Performed

Monday through Friday

Report Available

10 days

Specimen Retention Time

Not retained

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

85390

88348

LOINC Code Information

Test ID Test Order Name Order LOINC Value
PTEM Platelet TEM, B 79768-8

 

Result ID Test Result Name Result LOINC Value
CK109 Platelet TEM 79768-8
CK110 Interpretation 59466-3

Forms

1. Platelet Esoteric Testing Patient Information is required.

2. If not ordering electronically, complete, print, and send a Coagulation Test Request (T753) with the specimen.