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Estimating the Amount of Contamination in a Blood Sample Drawn from an Indwelling Line Infusing a Glucose Solution

Specialty:

Clinical Laboratory
Obstetrics & Gynecology
Cardiology
Emergency Medicine
Critical Care

Objective:

ICD-10:

Description:

Sometimes the only venous access that a patient may have is an indwelling catheter which is used to infuse fluids, often containing glucose. Blood collected from this line can be used for laboratory testing, but only after "wasting" (discarding as waste) a volume of blood sufficient to remove any contamination from the infusing crystalloid solution. Sometimes not enough blood is wasted, resulting in dilution of the blood sample.

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