Platelet Aggregation Reagents

Platelet Aggregation Reagents For all of your hemostasis reagent needs, turn to Discovery Diagnostics, the Canadian distributor for Helena Laboratories platelet aggregation reagents including;
platelet aggregation kit Platelet Aggregation Kit
Cat. No. Item
5369 Platelet Aggregation Kit
  ADP Reagent, 2 x 1 mL
  Collagen Reagent, 2 x 1 mL
  Epinephrine Reagent, 2 x 1 mL

The Platelet Aggregation Kit is used to identify normal and abnormal platelet function, to quantitate platelet response and to determine the patient's response to anti-platelet drug therapy. The reagents are optimized for use with the Helena AggRAM analyzer, but may be used on any turbidometric aggregometer of similar quality.



ADP reagentADP Reagent
Cat. No. Item
5366 ADP, 2 x 1 mL

ADP is a lyophilized preparation of adenosine-5-diphosphate. ADP is for use in routine platelet aggregation studies for the evaluation of qualitative platelet function disorders. The concentration of the reconstituted ADP reagent is 20 mM.




collagen reagentCollagen Reagent
Cat. No. Item
5368 Collagen, 2 x 1 mL

The collagen reagent is a clear, stabilized liquid reagent prepared from equine tendon, which is one of the world's best collagen preparations. Collagen is used in routine platelet aggregation studies for evaluation of qualitative platelet function disorders. The collagen reagent stock solution is reconstituted to a concentration of 100 µg/mL.




epinephrine reagentEpinephrine Reagent
Cat. No. Item
5367 Epinephrine, 2 x 1 mL

Epinephrine is a lyophilized preparation of L-epinephrine bitartrate. Epinephrine is for use in routine platelet aggregation studies for evaluation of qualitative platelet function disorders. After reconstitution, epinephrine concentration is 300 mg.




arachidonic acid reagentArachidonic Acid Reagent
Cat. No. Item
5364 Arachidonic Acid, 2 x 1 mL

Arachidonic Acid is a lyophilized preparation of sodium arachidonate for use in platelet aggregation studies of abnormal function, especially dysfunction induced by aspirin and aspirin-containing medications. The concentration of the reconstituted reagent is 5 mg/mL.




lyophilized plateletsLyophilized Platelets
Cat. No. Item
5356 Lyophilized Platelets, 5 x 10 mL
5371 Lyophilized Platelets, 5 x  5 mL

Lyophilized Platelets are a standardized suspension of fixed platelets derived from platelet concentrate. Lyophilized Platelets are for use in the quantitation of ristocetin cofactor activity in plasma. The platelets are lyophilized for stability. Tris-Buffered Saline (Cat. No. 5365) should be used for reconstitution. The concentration of the reconstituted platelet suspension is approximately 200,000/mL. Platelets in Cat. No. 5356 show a slower reaction rate.

ristocetin for aggregation assaysRistocetin (for Aggregation Assays)
Cat. No. Item
5199 Ristocetin, 10 x 0.5 mL

This Ristocetin is for use in platelet aggregation studies for confirmation of von Willebrand Disease (vWD) and Bernard-Soulier Syndrome. Normal platelet-rich plasma exhibits a positive aggregation response to the addition of ristocetin using a final concentration of 12-15 mg/mL. The majority of vWD patients exhibit a negative response to ristocetin as do Bernard-Soulier patients.




ristocetin cofactor assay kitHelena Ristocetin Cofactor Assay Kit
Cat. No. Item
5370 Ristocetin Cofactor Kit, 50 tests
  Lyophilized Platelets, 4 x 5.0 mL
  Ristocetin Cofactor Abnormal Control, 2 x 0.5 mL
  S.A.R.P. Assayed Reference Plasma, 2 x 1.0 mL
  Helena Ristocetin - 10 mg/mL, 2 x 1.5 mL
  Tris-Buffered Saline, 1 x 35 mL


Ristocetin cofactor assays measure the ability of von Willebrand factor (Ristocetin cofactor) in the patient's plasma to agglutinate formalinized platelets in the presence of ristocetin. Decreased levels of ristocetin cofactor activity are associated with von Willebrand Disease.


Ristocetin Cofactor Abnormal Control PlasmaRistocetin Cofactor Abnormal Control Plasma
Cat. No. Item
5373 Ristocetin Cofactor Abnormal Control, 5 x 0.5 mL

The control is to be used in the assay of ristocetin cofactor. It contains citrated human plasma with a level of ristocetin cofactor activity below 50%.




Ristocetin Cofactor AssaysRistocetin - 10 mg/mL (for Ristocetin Cofactor Assays)
Cat. No. Item
5372 Ristocetin - 10 mg/mL, 5 x 1.5 mL

The reagent is to be used in the quantitative determination of ristocetin cofactor activity. The ristocetin reagent is prepared from Nocardia lurida and is used in the tests for von Willebrand Disease and Bernard-Soulier Syndrome.