LAB3013
CREAT
UCHealth University of Colorado Hospital Clinical Laboratory - Core (Chemistry)
UCHealth Lone Tree Health Center Laboratory
UCHealth Cherry Creek Medical Center Laboratory
One 4.5 mL Green top with gel (PST) (lithium heparin plasma).
At least 0.5 mL whole blood in green top microtainer with gel (lithium heparin plasma), or other heparin tube such as 125 uL, plastic capillary (balanced heparin) blood tube at least 60% full.
Sample not properly identified; incorrect container; insufficient sample volume.
Internal: Deliver to lab immediately.
Offsite:Plasma: Centrifuge within 1 hour of collection. Transport to laboratory at ambient temperature.
Daily
Before centrifugation: 1 hour.
After centrifugation: Refrigerated, 7 days; Frozen, unacceptable.
Plasma aliquot: Refrigerated, 7 days; Frozen (-20 degrees C): Indefinitely.
Daily
Colorimetry
Same day
LAB3013
CREAT
UCH and Lone Tree Labs (effective 05/20/2014):
Males, 0.7 - 1.3 mg/dL
Females, 0.6 - 1.2 mg/dL
Adult reference range. Prior to puberty, values below the adult reference range are commonplace.
Cherry Creek Lab:
| Age | Reference Interval |
| 0 - 8 days | 0.60 - 1.0 mg/dL |
| 8 - 31 days | 0.30 - 0.70 mg/dL |
| 31 days - 1 year | 0.20 - 0.40 mg/dL |
| 1 - 19 years | 0.20 - 0.70 mg/dL |
| 19 years and over (female) | 0.52 - 1.04 mg/dL |
| 19 years and over (male) | 0.66 - 1.25 mg/dL |
Before 05/20/2014 (UCH and Lone Tree Labs only):
| Sex | From Age | To Age | Normal Low | Normal High | Units |
| M/F | 0 | 1 | 0.0 | 0.7 | mg/dL |
| M/F | 1 | 3 | 0.0 | 0.8 | mg/dL |
| M/F | 3 | 7 | 0.0 | 0.9 | mg/dL |
| M/F | 7 | 10 | 0.0 | 1.1 | mg/dL |
| M/F | 10 | 12 | 0.0 | 1.4 | mg/dL |
| M/F | 12 | 17 | 0.0 | 1.4 | mg/dL |
| M/F | 17 | 150 | 0.4 | 1.2 | mg/dL |
| Patient age <18 years | For patients under age 18 years old, the Bedside IDMS - traceable Schwartz GFR calculation should be used to estimate GFR: GFR (mL/min/1.73 m²) = (0.41 × Height in cm) / Creatinine in mg/dL |
| Patient age between 18 and 97 years | The eGFR is estimated by the IDMS -traceable CKD-EPI equation for ages 18-97 years. Not validated in pregnancy, acute illness, or for people with unique diets or abnormal muscle mass. |
82565
| Collection |
LAB3013
CREAT
UCHealth University of Colorado Hospital Clinical Laboratory - Core (Chemistry)
UCHealth Lone Tree Health Center Laboratory
UCHealth Cherry Creek Medical Center Laboratory
One 4.5 mL Green top with gel (PST) (lithium heparin plasma).
At least 0.5 mL whole blood in green top microtainer with gel (lithium heparin plasma), or other heparin tube such as 125 uL, plastic capillary (balanced heparin) blood tube at least 60% full.
Sample not properly identified; incorrect container; insufficient sample volume.
Internal: Deliver to lab immediately.
Offsite:Plasma: Centrifuge within 1 hour of collection. Transport to laboratory at ambient temperature.
Daily
Before centrifugation: 1 hour.
After centrifugation: Refrigerated, 7 days; Frozen, unacceptable.
Plasma aliquot: Refrigerated, 7 days; Frozen (-20 degrees C): Indefinitely.
| Ordering |
Daily
Colorimetry
Same day
LAB3013
CREAT
| Result Interpretation |
UCH and Lone Tree Labs (effective 05/20/2014):
Males, 0.7 - 1.3 mg/dL
Females, 0.6 - 1.2 mg/dL
Adult reference range. Prior to puberty, values below the adult reference range are commonplace.
Cherry Creek Lab:
| Age | Reference Interval |
| 0 - 8 days | 0.60 - 1.0 mg/dL |
| 8 - 31 days | 0.30 - 0.70 mg/dL |
| 31 days - 1 year | 0.20 - 0.40 mg/dL |
| 1 - 19 years | 0.20 - 0.70 mg/dL |
| 19 years and over (female) | 0.52 - 1.04 mg/dL |
| 19 years and over (male) | 0.66 - 1.25 mg/dL |
Before 05/20/2014 (UCH and Lone Tree Labs only):
| Sex | From Age | To Age | Normal Low | Normal High | Units |
| M/F | 0 | 1 | 0.0 | 0.7 | mg/dL |
| M/F | 1 | 3 | 0.0 | 0.8 | mg/dL |
| M/F | 3 | 7 | 0.0 | 0.9 | mg/dL |
| M/F | 7 | 10 | 0.0 | 1.1 | mg/dL |
| M/F | 10 | 12 | 0.0 | 1.4 | mg/dL |
| M/F | 12 | 17 | 0.0 | 1.4 | mg/dL |
| M/F | 17 | 150 | 0.4 | 1.2 | mg/dL |
| Patient age <18 years | For patients under age 18 years old, the Bedside IDMS - traceable Schwartz GFR calculation should be used to estimate GFR: GFR (mL/min/1.73 m²) = (0.41 × Height in cm) / Creatinine in mg/dL |
| Patient age between 18 and 97 years | The eGFR is estimated by the IDMS -traceable CKD-EPI equation for ages 18-97 years. Not validated in pregnancy, acute illness, or for people with unique diets or abnormal muscle mass. |
| Administrative |
82565
