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Platelet Transmission Electron Microscopic Study, Whole Blood-994

This test is restricted to internal orders from AHCI

Test info

Test name:

Platelet Transmission Electron Microscopic Study, Whole Blood

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Alternate names:

Platelet TEM
PTEM

Useful for:

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

Limitations:

Must be collected at an Allina Health metro hospital Mon - Wed only, before 10:00 am
Exceptions require prior pathologist approval
Required submission form must be submitted with all specimens
Hand deliver specimens to the laboratory. Do not send via PTS.

Specimen

Patient preparation information:

Fasting: 8 hours, preferred but not required

Must be collected at an Allina Health metro hospital Mon - Wed only, before 10:00 am

Specimen type:

ACD Whole blood

Collection container:

Yellow ACD (A or B)

Volume:

6 mL

Minimum volume:

3 mL

Collection instructions:

Immediately following collection, mix by inverting 8 - 10 times to prevent clotting

Processing instructions:

Do not spin
Submit original tube

Transport container:

Yellow ACD (A or B)

Required forms/information:

Platelet Esoteric Testing Patient Information

Transport and stability:

Ambient - 72 hours

Hand deliver specimens to the laboratory
Do not send via PTS

Reason for rejection:

Gross hemolysis

Performance

Performing lab:

Mayo Clinic Laboratories (PTEM); R-NX

Days set up:

Mo - Fr

TAT:

10 days

Method:

Transmission Electron Microscopy

Clinical and Interpretive info

Reference ranges:

Mean dense granules/platelet: > or =1.2

Billing

CPT codes:

85390
88348

Tracking

Date created:

10/20/2025

Review date:

10/20/2025