Caffeine

Last Modified: 2/13/2019 2:54:57 PM


Medical Necessity Documentation:  
Client Notes:  
Patient Preparation:  
Specimen Requirements: 1.0 mL Serum from a Red Top Tube in a Plastic Vial 
Collection Instructions: Collect as a trough just prior to next dose
Minimum Volume: 0.3 mL Serum
Transport & Storage: Temperature/Stability: 1 week Refrigerated
Rejection Criteria: Serum Separator Tube (SST®)
Reference Range: 8.0-20.0 mg/L
Critical Ranges: Potentially toxic: < 40 mcg/mL 

Lethal: 79-181 mcg/mL
Test Comments:  
Methodology: Immunoassay (IA)
Clinical Significance: Coffee, tea and other beverages may contain caffeine. Caffeine is a methylxanthine found in over the counter products and in prescription medications. Small premature infants with mild respiratory distress shortly after birth may be treated with theophylline or caffeine. In neonates, a significant amount of theophylline is converted to caffeine. Since the demethylation pathway of theophylline is relatively undeveloped, caffeine levels may be elevated. Caffeine clearance rates typically reach adult values at about 3-4 months of age.
Documentation:  
Custom Panel: No

PRODUCTION SCHEDULE

Turn Around Time: 2 to 5 days
Days Performed: Monday, Tuesday, Wednesday, Thursday, Friday
Sites Performed: Quest - Chantilly
PHL Test Code: CAFFS
EPIC Test Code: LAB706
Send Out Test Code: 305
Alternate Test Names: Caffeine Serum; Caffeine, Serum; Serum Caffeine
Included Tests:  
CPT Coding: 80155

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