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Additional Codes

Check procedure manual due to complexity in order mnemonics.

Clinical System Name

Iothalamate Level of Tolerance

Sample Requirements

Specimen: Whole blood

Container(s): Gold SST, Red, Gold Microtainer, Lt. Green/Lithium Heparin Microtainer

Preferred Vol: 1 mL

Minimum Vol: 0.5 mL



Specimen: Infusion Sample

Container(s): Sterile screw-capped container

Preferred Vol: 3 mL

Minimum Vol: 2 mL


Note:  Physician or clinic must arrange with Hematology-Oncology infusion unit for administration of iothalamate and specimen collection.  Note draw times as B0, B1, etc.  Note whether specimen is a clinical or research specimen.


Processing Instructions

Reject due to:

Spin: Y

Aliquot: Y

Temp: 2 - 8 C

Storage location: CPA refrigerator, FrigA rack.  Infusion bag can be placed in Iothalamate bucket in CPA fridge.  Keep labels with specimen.




Off-site collection:  Spin blood.  Send serum/plasma frozen.


Specimen Type Temperature Time
  Room temp 24 h
  Refrigerated 7 d
  Frozen 1 y



STAT Performed TAT
N T - F, day shift 1 - 4 d


Performing Laboratory

Seattle Children's Laboratory    


Department:  Chemistry

Location: Chem West

Phone Number: (206) 987-2617


Reference Range


Age mL/min/1.73m2
0 - 1 y 50.6 - 128.4
1 - 2 y 66.8 - 151.8
2 - 20 y 81.4 - 182.4




Method: HPLC

Analytical Volume: 0.150 mL serum or plasma; 1.0 mL infusion and prime specimen


CPT Codes