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Test Code CSF Glu CSF, Glucose

Patient Preparation

No special patient preparation required

Special Collection Instructions

Transport to lab as soon as possible

Collection Method

Lumbar puncture or CSF shunt

Minimum Volume

  • Adults: 0.5 ml
  • Pediatric: 0.4 ml

Container

Sterile CSF Tube

Preferred Specimen

Sterile CSF Tube

Acceptable Specimens

  • Sterile CSF Tube
  • Sterile Urine Cup

Reference or Target Ranges

40 – 70 mg/dL

Reportable Units

mg/dL

Critical Value

<40 mg/dL

Reasons for Rejection

 


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Hemolysis Threshold 1000 mg/dL
Icterus Threshold 30 mg/dL
Lipemia Threshold 1000 mg/dL
Other QNS, contaminated, improperly Labeled, improper specimen type

Specimen Stability

 


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Ambient ASAP
Refrigerated (4°C to 8°C) 24 hours
Frozen(-40°C to 0°C) N/A

Performance Information

 


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Days and Time Performed 24/7
Expected Turn Around Time Stat: 1 hour
Routine: 4 hours
Stat Availability Yes
Performing Bench UH Chemistry
Methodology/Method Description Siemens Atellica -  enzymatic method

Additional Information/Important Notes

CSF Glucose should be approximately 60% of the plasma values and must always be compared with concurrently measured plasma values for adequate clinical interpretation.

CPT Codes

82945