Last Modified:
6/17/2019 1:14:45 PM
Medical Necessity Documentation:
Client Notes:
Contact Client Response at 266-1500 (Option 2) for Stat Courier
Patient Preparation:
Specimen Requirements:
2.0 mL Platelet Poor Plasma from 2 Blue Top Tubes - 3.2% Na Citrate in a Plastic Vial
Collection Instructions:
Specimens must NOT collected from indwelling lines or ports.
Correct ratio of Blood to Citrate is critical (9:1). Specimens must be filled within +/- 10% of stated volume.
Order must include the patient's medication history at the time of specimen collection.
Transport & Storage: Temperature/Stability:
4 hours Ambient
Testing must be completed within 4 hours of collection
Should be at the testing laboratory Parkview Regional within 2 hours of collection.
Rejection Criteria:
If heparin, low molecular weight heparin, direct thrombin inhibitor or warfarin are present. Mixing Study Medication Screen must be completed at the time of specimen collection; Recent anticoagulation therapy
Reference Range:
Refer to Interpretive Pathology Report
Critical Ranges:
Test Comments:
Methodology:
Optical
Clinical Significance:
A mixing study aids in differentiating the cause of a prolonged prothrombin time (PT) and/or prolonged activated partial thromboplastin time (APTT).
Documentation:
PT & APTT will be performed at time of collection. If the prolongation of the PT & APTT is less than 2 seconds and 5 seconds over the respective reference ranges, the mixing study will not be performed per established criteria of Parkview Laboratories.
Custom Panel:
No
PRODUCTION SCHEDULE
Turn Around Time:
1 to 4 days
Days Performed:
Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
Sites Performed:
Parkview Regional Medical Center
PHL Test Code:
MIXS1
EPIC Test Code:
LAB2444
Alternate Test Names:
Circulating Anticoagulant; Mixing Studies
Included Tests:
CPT Coding:
85732 x 2, 85611, 85610, 85730
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