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Test Code MTX CSF Methotrexate Level CSF

Important Note

PROTECT FROM UV LIGHT.

Clinical System Name

Methotrexate Level CSF

Sample Requirements

Specimen: CSF

Container(s):  Sterile Screw-capped Container

Preferred Vol: 1.0 mL

Minimum Vol: 0.5 mL

 

Note:   Protect sample from light.  In-patients:  wrap paper towel around tube and seal with one piece of tape.  Off-site:  wrap tube in foil.  Specimen stable under fluorescent lighting for up to 4 hours.    

          

          

Processing Instructions

Reject due to: prolonged light/UV exposure

Spin: Y

Aliquot: Y

Temp: 2-8o C

Storage location:  CPA refrigerator, FrigA rack.

 

Off-site collection: Protect sample from light by wrapping tube in foil.  Note time of collection.  Send refrigerated.

Stability

Specimen Type Temperature Time
CSF RT

≤ 4 H

  Refrigerated

2 w

  Frozen

1 y

 

Availability

STAT Performed TAT
N Daily 1 d

 

Specimens received by 12:00 are reported same day.

Performing Laboratory

Seattle Children's Laboratory    

Department

Department:  Chemistry

Location: Chem West

Phone Number: 206-987-2617

 

 

Reference Range


Contact Chemistry (206) 987-2565 for expected levels.

Methodology

Method: Enzyme immunoassay by Vitros 4600

Analytical Volume:  0.150 mL CSF

CPT Codes

80299