Clinics and Departments

Laboratory Services

Lab Dept:

Chemistry

Test Name:

FENTANYL LEVEL

General Information

Lab Order Codes:

FEN

Synonyms:

Innovar®, China white, Sublimaze®

CPT Codes:

83542 - Column chromatography/mass spectrometry, analyte not elsewhere specified; quantitative, single stationary and mobile phase

Test Includes:

Fenatanyl level reported in ng/mL.

Logistics

Test Indications:

Monitoring Fentanyl (narcotic analgesic) levels

Lab Testing Sections:

Chemistry - Sendouts

Referred to:

MedTox Laboratories (MedTox Test: 163)

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

1 day

Special Instructions:

N/A

Specimen

Specimen Type:

Blood

Container:

Green top (Li Heparin) or Red top tube

Draw Volume:

9 mL (Minimum: 2 mL) blood

Processed Volume:

3 mL (Minimum: 0.7 mL) serum/plasma

Note: Submission of the minimum volume results in an elevated reporting range and inability to repeat analysis.

Collection:

Routine venipuncture

Special Processing:

Lab Staff: Centrifuge specimen, remove serum/plasma aliquot into a screw-capped round bottom plastic vial. Store and ship at refrigerated temperatures. Forward promptly.

Patient Preparation:

None

Sample Rejection:

Mislabeled or unlabeled specimens

Interpretive

Reference Range:

Therapeutic range for analgesia: 1 - 3 ng/mL

Critical Values:

>34 ng/mL without respiratory assistance

Observed concentrations during respiratory - assisted anesthesia: <200 ng/mL

Limitations:

Reporting limit: 0.1 ng/mL

Methodology:

Immunoassay (IA)

Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

References:

MedTox Web Page (May 2010)

Updates:

5/6/2010: CPT update, previously reported as 83925.



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