Method(s)
Chemistry Analyzer
Suggested CPT Code(s)
82438
82570
82945
83520
84302
84520
New York State Approval Status

Approved

Turnaround Time

10 days

Test Includes
1 Creatinine (Vitreous Fluid) Chemistry Analyzer mg/dL 0.5
2 Sodium (Vitreous Fluid) Na+ Chemistry Analyzer mmol/L 50 Electrolyte
3 Potassium (Vitreous Fluid) K+ Chemistry Analyzer mmol/L 1 Electrolyte
4 Chloride (Vitreous Fluid) Cl- Chemistry Analyzer mmol/L 50 Electrolyte
5 Glucose (Vitreous Fluid) C6H12O6; D-glucose (biologically active); Dextrose; L-glucose Chemistry Analyzer mg/dL 10 Sugar
6 Urea Nitrogen (Vitreous Fluid) Carbamide; carbonyl diamide; carbonyldiamine Chemistry Analyzer mg/dL 2.0 Electrolyte

Sample Type
Fluid
Requested Volume
1 mL
Minimum Volume
0.5 mL
Special Handling
Quantitative results for sodium and for potassium in vitreous specimens will be affected if performed on Gray Top Tubes since these collection tubes contain sodium fluoride and potassium oxalate.
Sample Container
Plastic container (preservative-free), Red top tube (no additive)

Additional Collection Instructions

Transport Temperature
Refrigerated
Light Protection
Not Required
Rejection Criteria
Gray top tube (Sodium Fluoride / Potassium Oxalate).

Rejection criteria pertain to clinical sample submissions only.

Stability
Room Temperature: Undetermined
Refrigerated: Undetermined
Frozen (-20 °C): Undetermined

Vitreous glucose levels decrease rapidly after death in vivo. This decrease is time and temperature-dependent, with a delay in loss facilitated by cold temperatures. The in vivo loss of glucose is reported to stop at approximately 18 hours post-death. Additionally, NMS studies have demonstrated a continued in vitro loss of glucose in vitreous when specimens are maintained at room temperature or refrigerated. No in vitro loss occurs when specimens are maintained frozen (-20°C) for up to 30 days.

The CPT Codes provided in this document are based on AMA Guidelines and are for informational purposes only. NMS Labs Does not assume responsibility for billing errors due to Reliance on the CPT Codes listed in this document.

*The information contained in this document represents database configurations, as they will appear on the effective date listed above.