Test Code Cephalexin Cephalexin
Clinical System Name
Cephalexin Level
Synonyms
Keflex
Sample Requirements
Specimen: Whole blood
Container(s): Gold SST, Gold Microtainer, Lt. Green/Lithium Heparin Microtainer
Preferred Vol: 1 mL
Minimum Vol: 0.5 mL
Note: Q8 hour dosing: draw level 4 hours post oral dose
Q6 hour dosing: draw peak level 2 hours post oral dose
Processing Instructions
Reject due to:
Spin: Y
Aliquot: Y
Temp: - 20 C
Storage location: CPA Freezer, Fz5 rack.
Off-site collection: Q8 hour dosing: draw level 4 hours post oral dose. Q6 hour dosing: draw peak level 2 hours post oral dose. Spin blood, aliquot serum or plasma and send frozen.
Stability
Specimen Type | Temperature | Time |
---|---|---|
Room temp | 4 h | |
Refrigerated | 48 h | |
Frozen | 1 m |
Availability
STAT | Performed | TAT |
---|---|---|
N | M - F, day shift | 1 - 3 d |
Performing Laboratory
Seattle Children's Laboratory
Department
Department: Chemistry
Location: Chem West
Phone Number: (206) 987-2617
CPT Codes
80299
Methodology
Method: HPLC
Analytical Volume: 0.2 mL serum or plasma
Limitations:
Reference Range
i. Q8 hour dosing: ≥22 μg/ml for osteomyelitis, ≥10 μg/ml for septic arthritis
ii. Q6 hour dosing: ≥15 μg/ml for osteomyelitis, N/A for septic arthritis