Prothrombin Time Mixing Study | Cleveland Clinic Laboratories

Prothrombin Time Mixing Study Print

Test Mnemonic

PTMIX

CPT Codes

85610 - QTY (1)
85390 - QTY (1)

Aliases

PT Correction Studies
PT Mixing Studies

Performing Laboratory

Cleveland Clinic Laboratories

Specimen Requirements

Volume	Type	Container	Collect Temperature	Transport Temperature	Special Instructions
4 mL	Plasma	Sodium citrate (Lt. Blue)		Frozen

Minimum Specimen Requirements

Volume	Type	Container	Collect Temperature	Transport Temperature	Special Instructions
1.5 mL

Stability

Environmental Condition	Description
Ambient	Unacceptable
Refrigerated	Unacceptable
Frozen	2 months

Days Performed

Mon - Fri

Turnaround Time

1 - 3 days

Methodology

Name	Description
Clot Detection

Reference Range

PT Screen
Sex	Age From	Age To	Type	Range	Range Unit
	Days	1 Days	Normal	< 14.9	sec
	1 Months	3 Months	Normal	< 13.3	sec
	2 Days	5 Days	Normal	< 14.3	sec
	6 Days	30 Days	Normal	< 13.4	sec
	4 Months	11 Months	Normal	< 13.0	sec
	1 Years	5 Years	Normal	< 10.7	sec
	6 Years	10 Years	Normal	< 11.3	sec
	11 Years	16 Years	Normal	< 11.2	sec
	17 Years	99 Years	Normal	< 13.1	sec

Special Info

Collect this extra light blue tube for the associated panel and send along with the original test to manual coag at main campus. If tests are abnormal in the panel, the following tests may be ordered and billed: Factor II , Factor V, Factor VII, Factor X, Factor VIII, Factor VIII Chromogenic, Factor IX Assay, Factor XI Assay, Factor XII Assay, Reptilase Time, D-Dimer, Thrombin Time, Fibrinogen, Bethesda Inhibitor, Factor XIII Antigen, Lupus Panel, DRVVT, STACLOT, Platelet Neutralization, Anti-Xa, Ristocetin co-factor, von Willebrand Ag, von Willebrand Multimer, Collagen Binding Assay & Fibrinogen Ag.

Clinical Info

To distinguish a coagulation factor deficiency from an inhibitor.