Medicare Medical Necessity Restrictions May Apply
Medical Necessity Documentation:
Client Notes:
Patient Preparation:
Specimen Requirements:
2.7 mL Whole Blood in a Blue Top Tube - 3.2% Na Citrate
Collection Instructions:
Specimens must be filled appropriately see this example
Correct ratio of Blood to Citrate is critical (9:1). Specimens must be filled within +/- 10% of stated volume.
If a Blue Top Tube is collected utilizing a butterfly, a Blue Discard Tube must be drawn first to remove air from the line. If this is not done, the Blue Top Tube will not be filled properly due to the vacuum in tube and a redraw will be required
Note: Collection of blood for coagulation testing through intravenous lines that have been previously flushed with heparin should be avoided, if possible.
If the blood must be drawn through an indwelling catheter, possible heparin contamination and specimen dilution should be considered.
When obtaining specimsn from indwelling lines that may contain heparin, the line should be flushed with 5mL of saline, and the first 5 mL of blood or 6-times the line volume
(dead space volume of the catheter) be drawn off and discarded before the coagulation tube is filled. For those samples collected from a normal saline lock (capped off venous port) twice the dead space volume of the catheter and extension set should be discarded.
Minimum Volume:
1.8 mL Whole Blood in a Clear Blue Top Tube
Neonatal Volume:
1.8 mL Whole Blood in a Clear Blue Top Tube
Transport & Storage: Temperature/Stability:
24 hours Ambient
Rejection Criteria:
Frozen in a Frost Free Freezer; over or under filled tubes; 3.8% Sodium Citrate; clotted; underfilled; overfilled; inappropriate temperature; HCT >55%; cell volume > 1/2 the tube volume; Re-frozen; Thawed specimens
Reference Range:
9.9 - 11.6 seconds
0.9 - 1.1 INR Value
Critical Ranges:
High Critical INR Limit: > 5.0
OHP High Critical INR Limit: > 4.0
Test Comments:
Reference range is established with each reagent lot.
Methodology:
Photo Optical
Clinical Significance:
Prothrombin test detects single or combined deficiencies of the extrinsic and/or common coagulation pathway.
Documentation:
Custom Panel:
No
PRODUCTION SCHEDULE
Stat Eligible:
Yes
Days Performed:
Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
Sites Performed:
Parkview Dekalb Hospital, Parkview Huntington Hospital, Parkview LaGrange Hospital, Parkview Noble Hospital, Parkview Randallia Hospital, Parkview Regional Medical Center, Parkview Southwest , Parkview Wabash Hospital, Parkview Warsaw , Parkview Whitley Hospital
PHL Test Code:
PT
EPIC Test Code:
LAB320
Alternate Test Names:
pro time; Protime; PT
Included Tests:
INR; Protime
CPT Coding:
85610