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Test Code PLRS Ristocetin Aggregation (Platelet Aggregation)

CPT

85576

Specimen Type

Blood.

Preferred Collection Container

BLUE (4 BLUE tubes required) and LAV

Collection Volume

10.8 mL

Minimum Collection Volume

10.8 mL

Collection Instructions

Blood must be drawn by Phlebotomy only. Avoid excessive suction on syringe during collection. Use minimum force when expelling blood from syringe.
NOTE: Do not send sample through pneumatic tube system.

Rejection Criteria

Platelet count less than 100 X 10E9/L, clotted specimen, hemolysis, patient receiving therapy with drugs particularly aspirin, antihistamines, anti-inflammatory drugs, psychotropic drugs, some antibiotics and many others.

Specimen Storage and Stability

Keep at room temperature.

Turn Around Time

24-48 hours.

Lab Department

Hematology

Alias

Platelet Aggregation; Ristocetin Aggregation;

Ordering Info

The following test has special processing requirements and cannot be collected or dropped at all of our ProMedica Laboratory Draw Sites. Please call Lab Customer Service at 419-291-4134 for which draw site is able to accommodate these special requirements. Must be scheduled in advance with Hematopathology: 419-291-5862. NOTE: Collection of blood for coagulation testing through indwelling catheters that have been flushed with heparin should be avoided, if possible. If specimen is drawn through an indwelling catheter, the line should be flushed with 5 ml saline and the first 5 ml of blood or six times the deadspace volume of the catheter being used should be discarded. Proper collection and handling of specimens is critical.

EPIC Code

LAB2436

Acceptable Collection Container

3.0 mL in a lavender tube; 10.8 mL in (4) 2.7 mL blue tubes containing 3.2% buffered sodium citrate.

Patient Preparation

For 10 days prior to testing, drugs that inhibit platelet aggregation are contraindicated (i.e., acetylsalicylic acid, antihistamines, chlordiazepoxide, clofibrate, cocaine, corticosteroids, diazepam, dipyridamole, furosemide, gentamicin, ibuprofen, indomethacin, marijuana, phenothiazines, phenylbutazone, propranolol, pyrimide, sulfinpyrazone, theophylline, tricyclic antidepressants).

Additional Information

Specimens must be analyzed within 3 hours of collection.

Day(s) and Time(s) Performed

Monday through Friday, 7:00 AM – 10:00. Must be scheduled with Hematopathology Dept.