# What is the purpose of an aliquot in a medical laboratory?

## What is the purpose of an aliquot in a medical laboratory?

When a drug or alcohol test is performed, a specimen such as blood, saliva, or urine is taken from the test subject. An aliquot, or measured portion of that specimen, is then used to perform the actual testing. The aliquot portion serves as a representative sample of the specimen as a whole.

## How much blood is in a transfusion unit?

People usually donate whole blood – blood taken right out of a vein through a needle. This whole blood may be called a unit or pint of blood, and equals about 450 milliliters or 16.7 ounces. But whole blood is rarely given as a transfusion.

How do you calculate blood to transfuse?

Conclusions: The following equation should be used to calculate transfusion volumes: weight (kg) x increment in Hb (g/dL) x 3/(hematocrit [Hct] level of RBCs).

### How many ml of blood is in a transfusion bag?

Packed RBCs are made by removing 200–250 ml of plasma from whole blood. The typical volume is 250–300 ml per bag. Each bag will raise the patient’s hemoglobin approximately 1 g/dl (hematocrit 3%).

### When do you use aliquot?

When the quantity of drug desired requires a degree of precision in measurement that is beyond the capability of the available measuring devices, the pharmacist or pharmacy technician may use the aliquot method of measurement.

What is an aliquot sample?

Sample aliquoting is the practice of dividing a sample into one or more smaller portions. Each smaller portion of the sample is known as an aliquot and it is similar in characteristics as the parent sample. It only differs in quantity.

## How many platelets are there in 1 mL of blood?

A normal platelet count ranges from 150,000 to 450,000 platelets per microliter of blood. Having more than 450,000 platelets is a condition called thrombocytosis; having less than 150,000 is known as thrombocytopenia. You get your platelet number from a routine blood test called a complete blood count (CBC).

## How many grams are in a unit?

Atomic Mass Unit to Gram Conversion Table

Atomic Mass Unit [u] Gram [g]
0.1 u 1.6605402E-25 g
1 u 1.6605402E-24 g
2 u 3.3210804E-24 g
3 u 4.9816206E-24 g

What is an aliquot in blood work?

Blood Aliquot Types. This is plasma isolated from whole blood that was collected in tubes coated with EDTA. The EDTA acts as an anticoagulant. This is plasma isolated from whole blood that was collected in tubes containing 0.109M, 3.2%, sodium citrate. This is plasma isolated from whole blood that was collected in tubes coated with sodium Heparin.

### What is blood aliquot made of?

Blood Aliquot Types. This is plasma isolated from whole blood that was collected in tubes coated with EDTA. The EDTA acts as an anticoagulant. This is plasma isolated from whole blood that was collected in tubes containing 0.109M, 3.2%, sodium citrate.

### Is it safe to draw blood from aliquots?

The study showed that aliquots can be safely drawn from a single unit of blood, reducing waste and minimizing the donor exposure for newborns who require multiple transfusions. Finding out what’s in the aliquot has shown that this current hospital practice is safe.

What is the CPT code for blood transfusion?

Code 36420 is billed once per day per patient. Use P9011 only for the last aliquot along with 36430 if transfused on a different day for the same patient or the first time transfusion for a different patient. The 2007 HCPCS code definition does not require specifying units.