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Test Code GENT (LAB27) ; GENT TR (LAB26) ; GENT PK (LAB28) Gentamicin

Important Note

If ordered as STAT testing, please send sample(s) to UWMC NW220 via OMG Courier.

Clinical System Name

Gentamicin (Random, Peak, Trough)

Sample Requirements

Specimen: Whole Blood

Container(s): Lt. Green/Mint Top Lithium Heparin, Lt. Green/Lithium Heparin Microtainer, Gold SST, Gold Microtainer, Dark Green/Sodium Heparin, Red, Lavender/EDTA, or Lavender/EDTA microtainer

Preferred Vol: 1.0 mL

Minimum Vol: 0.5 mL

 

Note:  Gold preferred. Note on the requisition whether the specimen is peak, trough, or random. Draw peak level ½ hour after the end of a ½ hour infusion or 1 hour post IM injection. Draw trough level ½ hour before the next dose. Only Random level is available STAT.

Processing Instructions

Reject due to: Age of specimen

Spin: Y

Aliquot:  Y

Temp: -20C

Storage location:  Spin blood, freezer 0.5 - 1.0 mL serum or plasma in a plastic tube affixed with a large EPIC label. On weekends, send all STAT samples directly to UWMC-MT NW220; on weekdays, notifiy Send Outs (x72563) if test is ordered STAT.

 

Off-site collection: Spin and freeze plasma/serum and ship frozen.

Stability

Specimen Type Temperature Time
Serum or Plasma RT

 
Serum or Plasma 2-8 C

24 h
Serum or Plasma -20 C or -70 C

7 d

Availability

STAT Performed TAT
 Y  daily 1 day

Performing Laboratory

University of Washington Medical Center (Montlake)

Department of Laboratory Medicine

1959 NE Pacific St, NW220

Seattle, WA 98195

Phone Number: (206) 520-4600

 

Department

Department:  Send Outs

Phone Number: 206-987-2563

Methodology

Method: Enzyme Immunoassay Technique

 

Reference Range

All Ages mcg/mL

Peak (Therapeutic)    

 4 - 12
Trough 0 - 2
Toxic

≥ 12

 

Neonatal Levels and Suggested Dosing  
Trough level taken at 24 hours: Suggested dosing interval:
≤ 1 mcg/mL 24 hours
1.1 to 2.3 mcg/mL 36 hours
2.4 to 3.2 mcg/mL 48 hours

CPT Codes

80170

Critical Values

≥ 12 mcg/mL