Lab Test

DDAVP (Desmopressin) Panel, Pre- and Post-Trial

Test Codes

For Platelets: EPIC: LAB6804, DDVPL, For von Willebrand Disease: EPIC: LAB6803, DDVWF

Instructions

  • Patients with von Willebrand Disease or qualitative platelet disorders may require a trial of DDAVP prior to invasive procedures. Beaumont Laboratory has arranged a protocol to facilitate these trials. The Pre- and Post-Trail DDAVP Panel includes:
  • Arrangements for the time and place of specimen collection must be made by the ordering physician. It is recommended that specimens be collected at a Beaumont Hospital campus location.

Specimen Collection Criteria

Collect: Five Light Blue-top 3.2% Sodium Citrate tubes.

  • TUBES MUST BE FULL.
  • Three Light Blue-top tubes are to be used for von Willebrand Disease Panel. Two Light Blue-top tubes are to be used for Platelet Function Analysis.
  • The specimen must be identified as Pre-DDAVP or Post-DDAVP on the requisition or documented in the computer system.

Rejection Criteria

  • Glass tubes and 3.8% Sodium Citrate tubes.
  • Specimens that are clotted or grossly hemolyzed.
  • Inappropriate specimen volume.
  • Thawed or partially thawed specimens. 

In-Lab Processing

Specimens for Platelet Function Analysis (two tubes) must not be refrigerated, frozen, or centrifuged. PFA specimens must be analyzed within 3 hours of collection.

Specimens for von Willebrand Disease Panel (three tubes)
 must be processed as follows upon receipt in the Laboratory:

  1. Centrifuge the capped tube at 1500 x g for 15 minutes.
  2. Transfer plasma with a plastic pipette into a plastic polypropylene centrifuge tube, cap and centrifuge an additional 15 minutes at 1500 x g to obtain platelet poor plasma (PPP) which has a platelet count less than 10 bil/L. Plasma with a platelet count of less than 10 bil/L is critical for accurate results.
  3. Immediately remove only the top two-thirds of the PPP and transfer it into a screw cap, 5 ml, 75 x 13 mm, round base, polypropylene tube.
  4. Test or freeze specimen according to lab protocol.


Storage

Specimen Stability for Testing:

Platelet Function Analysis Specimens
Room Temperature (20-26°C or 68-78.8°F): 3 hours
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): Unacceptable

Whole Blood for von Willebrand Disease Panel

Room Temperature (20-26°C or 68-78.8°F): 4 hours
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): Unacceptable

Platelet Poor Plasma (PPP) for von Willebrand Disease Panel
Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): 30 days

Specimen Storage in Department Prior to Disposal:

Frozen (-20°C/-4°F or below): 30 days

Laboratory

Royal Oak Coagulation Laboratory
Troy Hematology/Coagulation Laboratory

Performed

Monday – Friday.
Results available in 4-7 business days. 

Reference Range

von Willebrand Disease Panel
Factor VIII Activity: 50-175%
von Willebrand Factor Activity: 50-175%
von Willebrand Factor Antigen: 50-175%

Platelet Function Analysis
Collagen/Epinephire: Less than or equal to 160 seconds
Collagen/ADP: Less than or equal to 106 seconds 

Interpretation

In patients with mild von Willebrand or qualitative platelet abnormalities, DDAVP (desmopression) can normalize von Willebrand Antigen, von Willebrand Activity, Factor VIII Activity, and/or PFA results. Clinical correlation is necessary to determine if post-DDAVP changes are sufficient for the patient to undergo invasive procedures.

Clinical Utility

The DDAVP trial tests are used for patients with von Willebrand Disease and platelet disorders prior to invasive procedures.

CPT Codes

85240, 85244, 85245, 85576x2.

Contacts

Last Updated

1/27/2021

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