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Test Code LAB1765 Creatinine Clearance

Additional Codes

Creat

Clinical System Name

Creatinine Clearance

Synonyms

Creat Cl

Sample Requirements

Specimen: Urine and Whole Blood

Container(s): Sterile specimen container AND Gold SST, Dark Green/Sodium Heparin, Red, Gold Microtainer, or Lt. Green/Li Heparin Microtainer

Preferred Vol: 1.0 mL

Minimum Vol: 0.5 mL serum or plasma

 

Note:  Urine method is affected by fecal contamination, loss of specimen during collection, and height and weight of patient.  Refrigerate urine sample during collection and storage.  The use of no preservative is preferable. Loss of more than 10% of total urine collection invalidates the test.  Serum creatinine must also be ordered and collected within 24 h of urine collection.  Provide height and weight of patient.

 

Processing Instructions

Reject due to:  Age of specimen

Spin: N

Aliquot: N

Temp: 2-8 C

Storage location: Urine can be stored in CPA refrigerator, FrigB bucket if space allows.

Note: When ordering, use "end of collection" date/time as collection time.

 

Off-site collection: Refrigerate urine sample during collection and storage.  The use of no preservative is preferable. Loss of 10% of total urine collected invalidates the test.  Serum creatinine must also be ordered and collected within 24 h of urine collection.  Provide height and weight of patient.

Stability

 

Specimen Type Temperature Time
Urine RT

N
  Refrigerated

≤ 30 D
  Frozen

N

 

Availability

STAT Performed TAT
N M - F, day shift 1- 3 d

 

Performing Laboratory

Seattle Children's Laboratory    

Department

Department:  Chemistry

Location: Chem East

Phone Number: 206-987-2617

CPT Codes

82575

Methodology

Method:  Two Point Rate by Vitros 4600 (urine)

Analytical Volume:  0.02 mL + 0.03 mL dead space (urine)

Reference Range

 

  mL/min/1.73 M2
Premature infant 29 - 65
Full term infant, 2 days - 1 week 26 - 80
Full term infant, 1 - 4 weeks 28 - 68
4 weeks - 6 months 41 - 103
6 - 12 months 49 - 157
12 months - 2 years 63 - 175
2 - 13 years 89 - 165
Females 13 - 60 years 75 - 115
Males 13 - 60 years 85 - 125