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22956 Platelet Function Test

Platelet Function Test
Test Code: PFT-EPI
Synonyms/Keywords
PFA-100, Platelet Function Assay-100
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Whole Blood​ Citrated Blue Top Tube (BTT)​ ​ 2.7mL​ 2.7mL​ ​1.8 mL
Collection Processing Instructions
DO NOT CENTRIFUGE the vacutainer tube.​
Specimen Stability Information
Specimen Type Temperature Time
Whole Blood​ Ambient​ 4 Hours​
Rejection Criteria
Specimens filled below the fill line
Specimens showing platelet aggregates or microthrombi​
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Diagnostic Treatment Center
 Monday through Sunday​ Less than 2 hours​ High Shear Closure Time with EPI/ADP / PFA-100​
​Marshfield​ ​Monday through Sunday​ ​Less than 2 hours​ ​High Shear Closure Time with EPI/ADP/ PFA-100​
Test Information
This orders a Platelet Function Test - EPI. If the epinephrine test is prolonged, a reflexive ADP test is ordered and billed.​
Reference Range Information
Performing Location Reference Range
Marshfield​

Platelet Function Test - Epi:
<1 month: 47-115 seconds
= or >2 years: 65-176 seconds


Platelet Function Test - ADP:
<1 month: 44-68 seconds
= or >2 years: 52-112 seconds


For ages not listed (>1 mo but less than 2 years), use the = or > 2 years ranges:
No reference ranges have been established for this group.​

​See Critical value List for list of current critical values​
Interpretation
The interpretation of a prolonged epinephrine test requires the ADP result. Prolonged epinephrine with a normal ADP suggests aspirin or aspirin-like effect. Prolonged epinephrine and ADP are suggestive of intrinsic platelet defect, von Willebrand's disease or effect of platelet inhibiting agents.​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
85576​ ​ ​ ​ ​
Synonyms/Keywords
PFA-100, Platelet Function Assay-100
Ordering Applications
Ordering Application Description
Centricity​ ​Platelet Funct-EPI (Bleeding Time)
​Cerner Platelet Function-EPI
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Whole Blood​ Citrated Blue Top Tube (BTT)​ ​ 2.7mL​ 2.7mL​ ​1.8 mL
Collection Processing
DO NOT CENTRIFUGE the vacutainer tube.​
Specimen Stability Information
Specimen Type Temperature Time
Whole Blood​ Ambient​ 4 Hours​
Rejection Criteria
Specimens filled below the fill line
Specimens showing platelet aggregates or microthrombi​
Reference Range Information
Performing Location Reference Range
Marshfield​

Platelet Function Test - Epi:
<1 month: 47-115 seconds
= or >2 years: 65-176 seconds


Platelet Function Test - ADP:
<1 month: 44-68 seconds
= or >2 years: 52-112 seconds


For ages not listed (>1 mo but less than 2 years), use the = or > 2 years ranges:
No reference ranges have been established for this group.​

​See Critical value List for list of current critical values​
Interpretation
The interpretation of a prolonged epinephrine test requires the ADP result. Prolonged epinephrine with a normal ADP suggests aspirin or aspirin-like effect. Prolonged epinephrine and ADP are suggestive of intrinsic platelet defect, von Willebrand's disease or effect of platelet inhibiting agents.​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Diagnostic Treatment Center
 Monday through Sunday​ Less than 2 hours​ High Shear Closure Time with EPI/ADP / PFA-100​
​Marshfield​ ​Monday through Sunday​ ​Less than 2 hours​ ​High Shear Closure Time with EPI/ADP/ PFA-100​
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
85576​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.