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Phone Extensions

 

Laboratory Main Line

208-625-5858 

Point of Care

208-625-4218

 

 

Fax Extensions

 

Incoming Orders/Requisitions

 208-769-8581

General Laboratory

208-625-5822

Blood Bank

208-625-5821

Microbiology

208-625-5823

 

Accreditations

The College of American Pathologists (CAP's) Laboratory Accreditation Program accredits the entire spectrum of laboratory test disciplines with the most scientifically rigorous customized checklist requirements.

 

The CAP's peer-based inspector model provides a unique balance of regulatory and educational coaching supported by the most respected worldwide pathology organization.

 

The Laboratory Accreditation Program inspects a variety of laboratory settings from complex university medical centers to physician office laboratories, and covers a complete array of disciplines and testing procedures.

 

www.cap.org

 

Regulatory Links

CLIA Certification (2025 to 2027)

CAP Certification

 

 

Mayo Clinic Laboratories

Test Code LAB4017 PTT

Important Note

Tube must be filled completely to maintain correct Anticoagulant/Blood ratio.

Specimen must be tested or frozen within 4 hours of draw.

Specimen Type

Blue top tube (buffered 3.2% liquid sodium citrate) filled to the indicator with whole blood or Sodium Citrate Plasma removed from cells.

Specimen Volume

3mL Blue top (3.2% Sodium Citrate)
5mL Blue top (3.2% Sodium Citrate)
1mL Blue top (3.2% Sodium Citrate)
500uL (minimum) Sodium Citrate Plasma spun and removed from cells.

Turnaround Time

STAT: 1hr
Routine: 2-4 hours

Test Schedule

Daily

Sample Stability

Non-heparin Patients: 4 hours, spun or unspun
Patients on heparin: 1 hour unspun, 4 hours spun. Platelet poor plasma required.
Frozen samples are stable for 2 weeks at -20C or 12 months at -70C.

Specimen Processing

Assays of non-heparinized patients must be performed within 4 hours of collection. Assays on specimens suspected to contain unfractionated heparin therapy should be tested within 1 hour of collection.  If time interval between drawing and testing exceeds 1 hour, process sample to create platelet poor plasma, separate into plastic tube and freeze at -20C or less. Frozen samples are stable for 2 weeks at -20C or 12 months at -70C.

Method

Electromechanical

Reference Ranges

PTT 23.5 – 34.6 seconds

Synonyms

Partial Thromboplastin Time; APTT

Test Components

PTT, sec

CPT Codes

85730