Prothrombin Time & Partial Thromboplastin Time

General Information

Lab Name

Prothrombin and PTT

Lab Code

PPP

Epic Name

Prothrombin and PTT

Synonyms

Coags, Coagulation Screen - PPP, Protime & PTT

Components

Specimen Type: Blood
Collection: 3 mL or 5 mL BLUE TOP (CITRATE) tube

Pediatric draws: (At UW-MT ONLY) Contact the lab at 598-6242 and ask for a baby draw tube for coagulation testing.
Handling Instructions: For Heparin monitoring on inpatients, specimen MUST be processed within 1 hour.

UW-MT/HMC: all other PTT requests, process within 6 hours of blood collection.

UW-NW: Specimens must be processed within 4 hours of blood collection.
Quantity: Requested: entire sample

Receiving Instructions: Take specimen to COAG.

Outside Laboratory: Centrifuge for 10 minutes, remove plasma & re-spin plasma for another 10 minutes. Decant & Freeze plasma (minimum 1.0 mL) @ -20°C to -80°C. Send Frozen on dry ice.

Stability: plasma samples frozen at -80°C are good for 1 year

Lab Department

Coagulation(COAG)

Frequency

Daily

Available STAT?

Yes

Performing Location(s)

HMC	Coagulation 206-520-4600 325 9th Ave, Rm # GWH-47, Seattle, WA 98104-2420
UW-NW	Main Lab 206-668-1344 UW Medical Center – Northwest 1550 N 115th Street, A200 Seattle, WA 98133
FHCC	Fred Hutch Alliance Lab 206-606-1088 825 Eastlake Ave, Seattle, WA 98109
UW-MT	Coagulation 206-520-4600 Clinical Lab, Room NW220, University of Washington Medical Center, 1959 NE Pacific street, Seattle, WA 98195