Factor XII (12) Inhibitor Profile
Order Code:
F12INP
Test Summary
Factor Inhibitors are auto antibodies against normal clotting factors. They are most commonly acquired antibodies, through this testing the strength of the antibody can be measured and treatment designed. Hemophiliac patients can acquire these allo-antibodies from the products they receive for treatment. Factor VIII and Factor IX types of inhibitors are the most common. Factor Inhibitor Profiles also include the initial Factor Activity result.
Aliases
- Factor 12 Inhibitor
Specimen Collection
Special Instructions
See Link and Print "Drug List for Special Coagualtion Tests"
Preferred Specimen
5 plastic (2.7mL) completely filled 3.2% Sodium Citrate (light blue top) tubes
Minimum Volume
6 Frozen Capped aliquots of Sodium Citrate plasma (Polypropylene tubes recommended)
Instructions
Use standard venipuncture and disposal techniques
Collect the required quantity of Sodium Citrate (light blue top) tubes.
If unable to process specimens within 4 hours of collection then call CompuNet transportation for a STAT pick-up at (937) 297-8262 option 1.
Sodium Citrate (light blue top) tube(s): Process immediately (stable only 4 hours), following instructions below:
Note: We recommend aliquot tubes to be made of polypropylene plastic as this material is safe to freeze at <-70 degrees C.
1. Centrifuge capped Sodium Citrate (light blue top) tubes at 3000 rpm for 10 minutes, or at speed and time required to consistently produce Platelet Poor Plasma (<5/kmm3).
2. Carefully remove the plasma from all Sodium Citrate (light blue top) tubes; avoid disturbing the WBC/buffy coat, and combine all plasma into a plastic conical centrifuge tube.
Note: If the plasma shows any hemolysis, it must be recollected.
3. Centrifuge the plasma in the plastic conical centrifuge tube for a second time as in step 1.
4. In one smooth motion, carefully and quickly pour the centrifuged plasma into a second plastic conical centrifuge tube. A small amount of plasma along with a red cell button should remain on the bottom of the original conical tube if the pour was executed correctly.
Note: This quick-pour method prevents platelet transfer and contamination.
5. Aliquot at least 1mL of plasma into each aliquot tubes labeled “plasma.” Refer to the Minimum Volume section above for the number of aliquots required per test.
6. Finally, place all aliquots into a <-20 degrees C freezer within 4 hours.
Note: Aliquots must remain frozen until they are picked up by the CompuNet courier. Call CompuNet transportation department if frozen specimen boxes are needed.
Collect the required quantity of Sodium Citrate (light blue top) tubes.
If unable to process specimens within 4 hours of collection then call CompuNet transportation for a STAT pick-up at (937) 297-8262 option 1.
Sodium Citrate (light blue top) tube(s): Process immediately (stable only 4 hours), following instructions below:
Note: We recommend aliquot tubes to be made of polypropylene plastic as this material is safe to freeze at <-70 degrees C.
1. Centrifuge capped Sodium Citrate (light blue top) tubes at 3000 rpm for 10 minutes, or at speed and time required to consistently produce Platelet Poor Plasma (<5/kmm3).
2. Carefully remove the plasma from all Sodium Citrate (light blue top) tubes; avoid disturbing the WBC/buffy coat, and combine all plasma into a plastic conical centrifuge tube.
Note: If the plasma shows any hemolysis, it must be recollected.
3. Centrifuge the plasma in the plastic conical centrifuge tube for a second time as in step 1.
4. In one smooth motion, carefully and quickly pour the centrifuged plasma into a second plastic conical centrifuge tube. A small amount of plasma along with a red cell button should remain on the bottom of the original conical tube if the pour was executed correctly.
Note: This quick-pour method prevents platelet transfer and contamination.
5. Aliquot at least 1mL of plasma into each aliquot tubes labeled “plasma.” Refer to the Minimum Volume section above for the number of aliquots required per test.
6. Finally, place all aliquots into a <-20 degrees C freezer within 4 hours.
Note: Aliquots must remain frozen until they are picked up by the CompuNet courier. Call CompuNet transportation department if frozen specimen boxes are needed.
Patient Preparation
N/A
Storage
Whole blood Sodium Citrate (light blue top) tubes
OR
Frozen - Capped aliquots of Sodium Citrate plasma (Polypropylene tubes recommended)
OR
Frozen - Capped aliquots of Sodium Citrate plasma (Polypropylene tubes recommended)
Transport Temperature
Frozen Sodium Citrate plasma
Specimen Stability
- Room Temperature: Whole blood Sodium Citrate (light blue top) tubes < 4 hours
- Refrigerated: Unacceptable for Sodium Citrate (light blue top) tubes whole blood or capped plasma aliquots
- Frozen: Capped aliquots of Sodium Citrate plasma (Polypropylene tubes recommended) < 30 days at < -20 degrees C
Limitations
Anti-coagulant medications
Other Acceptable Specimens
N/A
Unacceptable Specimens
Rejected for hemolysis, clotted, improper fill, incorrect specimen type, thawed frozen aliquots, refrigerated plasma or blood, expired test tubes, >4 hours old if not processed into separated frozen plasma vials.
Order Code
F12INP
EPIC (Premier) Code
LAB6727
Includes
Factor XII Inhibitor titer
Factor XII activity level
Pathologist Interpretation
Thrombin Clotting Time (TCT)
PT
PT 1:1 mix (reflexes to this if PT is prolonged)
APTT
If APTT is prolonged then it will reflex to the following mixes and incubations:
APTT 1:1 mix Immediate, 1 hour at 37⁰C, and 2 hours at 37⁰C
APTT 1:4 mix Immediate, 1 hour at 37⁰C, and 2 hours at 37⁰C
Pathology Interpretation
Factor XII activity level
Pathologist Interpretation
Thrombin Clotting Time (TCT)
PT
PT 1:1 mix (reflexes to this if PT is prolonged)
APTT
If APTT is prolonged then it will reflex to the following mixes and incubations:
APTT 1:1 mix Immediate, 1 hour at 37⁰C, and 2 hours at 37⁰C
APTT 1:4 mix Immediate, 1 hour at 37⁰C, and 2 hours at 37⁰C
Pathology Interpretation
CPT Code
- 85335
- 85280
- 85610
- 85730
- 85670
- 85732 x6
- 85611 if reflexes are indicated
Billing Code
- 500245
- 300490
- 300482
- 300492
- 300448
CPT Statement
Methodology
Clot based
FDA Status
FDA approved
Physician Attestation of Informed Consent
N/A
Testing Laboratory
CompuNet Clinical Laboratories, LLC
2308 Sandridge Drive
Moraine OH, 45439
2308 Sandridge Drive
Moraine OH, 45439
Department
Hematology
Reference Range
See Report by age
Setup Schedule / Expected Turnaround Time
Monday - Friday; SCOAG; Report available: 1 - 3 days
Specimen Collection
Special Instructions
See Link and Print "Drug List for Special Coagualtion Tests"
Preferred Specimen
5 plastic (2.7mL) completely filled 3.2% Sodium Citrate (light blue top) tubes
Minimum Volume
6 Frozen Capped aliquots of Sodium Citrate plasma (Polypropylene tubes recommended)
Instructions
Use standard venipuncture and disposal techniques
Collect the required quantity of Sodium Citrate (light blue top) tubes.
If unable to process specimens within 4 hours of collection then call CompuNet transportation for a STAT pick-up at (937) 297-8262 option 1.
Sodium Citrate (light blue top) tube(s): Process immediately (stable only 4 hours), following instructions below:
Note: We recommend aliquot tubes to be made of polypropylene plastic as this material is safe to freeze at <-70 degrees C.
1. Centrifuge capped Sodium Citrate (light blue top) tubes at 3000 rpm for 10 minutes, or at speed and time required to consistently produce Platelet Poor Plasma (<5/kmm3).
2. Carefully remove the plasma from all Sodium Citrate (light blue top) tubes; avoid disturbing the WBC/buffy coat, and combine all plasma into a plastic conical centrifuge tube.
Note: If the plasma shows any hemolysis, it must be recollected.
3. Centrifuge the plasma in the plastic conical centrifuge tube for a second time as in step 1.
4. In one smooth motion, carefully and quickly pour the centrifuged plasma into a second plastic conical centrifuge tube. A small amount of plasma along with a red cell button should remain on the bottom of the original conical tube if the pour was executed correctly.
Note: This quick-pour method prevents platelet transfer and contamination.
5. Aliquot at least 1mL of plasma into each aliquot tubes labeled “plasma.” Refer to the Minimum Volume section above for the number of aliquots required per test.
6. Finally, place all aliquots into a <-20 degrees C freezer within 4 hours.
Note: Aliquots must remain frozen until they are picked up by the CompuNet courier. Call CompuNet transportation department if frozen specimen boxes are needed.
Collect the required quantity of Sodium Citrate (light blue top) tubes.
If unable to process specimens within 4 hours of collection then call CompuNet transportation for a STAT pick-up at (937) 297-8262 option 1.
Sodium Citrate (light blue top) tube(s): Process immediately (stable only 4 hours), following instructions below:
Note: We recommend aliquot tubes to be made of polypropylene plastic as this material is safe to freeze at <-70 degrees C.
1. Centrifuge capped Sodium Citrate (light blue top) tubes at 3000 rpm for 10 minutes, or at speed and time required to consistently produce Platelet Poor Plasma (<5/kmm3).
2. Carefully remove the plasma from all Sodium Citrate (light blue top) tubes; avoid disturbing the WBC/buffy coat, and combine all plasma into a plastic conical centrifuge tube.
Note: If the plasma shows any hemolysis, it must be recollected.
3. Centrifuge the plasma in the plastic conical centrifuge tube for a second time as in step 1.
4. In one smooth motion, carefully and quickly pour the centrifuged plasma into a second plastic conical centrifuge tube. A small amount of plasma along with a red cell button should remain on the bottom of the original conical tube if the pour was executed correctly.
Note: This quick-pour method prevents platelet transfer and contamination.
5. Aliquot at least 1mL of plasma into each aliquot tubes labeled “plasma.” Refer to the Minimum Volume section above for the number of aliquots required per test.
6. Finally, place all aliquots into a <-20 degrees C freezer within 4 hours.
Note: Aliquots must remain frozen until they are picked up by the CompuNet courier. Call CompuNet transportation department if frozen specimen boxes are needed.
Patient Preparation
N/A
Storage
Whole blood Sodium Citrate (light blue top) tubes
OR
Frozen - Capped aliquots of Sodium Citrate plasma (Polypropylene tubes recommended)
OR
Frozen - Capped aliquots of Sodium Citrate plasma (Polypropylene tubes recommended)
Transport Temperature
Frozen Sodium Citrate plasma
Specimen Stability
- Room Temperature: Whole blood Sodium Citrate (light blue top) tubes < 4 hours
- Refrigerated: Unacceptable for Sodium Citrate (light blue top) tubes whole blood or capped plasma aliquots
- Frozen: Capped aliquots of Sodium Citrate plasma (Polypropylene tubes recommended) < 30 days at < -20 degrees C
Limitations
Anti-coagulant medications
Other Acceptable Specimens
N/A
Unacceptable Specimens
Rejected for hemolysis, clotted, improper fill, incorrect specimen type, thawed frozen aliquots, refrigerated plasma or blood, expired test tubes, >4 hours old if not processed into separated frozen plasma vials.
Billing
CPT Code
- 85335
- 85280
- 85610
- 85730
- 85670
- 85732 x6
- 85611 if reflexes are indicated
Billing Code
- 500245
- 300490
- 300482
- 300492
- 300448
CPT Statement
Result Information
Methodology
Clot based
Testing Laboratory
N/A
Reference Range
See Report by age
Setup Schedule / Expected Turnaround Time
Monday - Friday; SCOAG; Report available: 1 - 3 days