Blood Collection Procedures

10 Questions

What are the three general procedures for obtaining blood?

Skin puncture (capillary), venipuncture, arterial puncture

When is capillary blood frequently used?

When only small amount of blood are required

What are the advantages of capillary blood?

It is obtained with ease. It is the preferred specimen for making peripheral blood films since no anticoagulant is added that affect.

Where are the sites of puncture for adults and children?

Palmar surface of the tip of the ring or middle finger or free margin of the ear lobe

Where are the sites of puncture for infants?

Plantar surface of the big toe or the heel

Factors That Increase The Risk Of Hemolysis: Use of needle that is too ______

small

Factors That Increase The Risk Of Hemolysis: Jostling and jarring of tubes in transit can ______ the RBCs

lyse

Factors That Increase The Risk Of Hemolysis: Pressing the syringe plunger to force the blood into the ______

tube

Factors That Increase The Risk Of Hemolysis: Drawing blood specimen from an intravenous or ______ line

central

Factors That Increase The Risk Of Hemolysis: Under filling a tube so that the ratio of anticoagulant to blood is greater than ______

1:9

Study Notes

Obtaining Blood

There are three general procedures for obtaining blood:
Not specified in the provided text, but generally, they are Venipuncture (phlebotomy), Arterial Puncture, and Fingerstick (Capillary Puncture)

Capillary Blood

Capillary blood is frequently used in pediatric and neonatal patients, as well as in situations where venipuncture is not feasible
Advantages of capillary blood include ease of collection, minimal trauma, and low risk of complications

Puncture Sites

For adults and children, the most common sites of puncture are the medial cubital vein, the basilic vein, and the cephalic vein
For infants, the most common site of puncture is the heel (plantar surface)

Factors That Increase the Risk of Hemolysis

Using a needle that is too small can increase the risk of hemolysis
Jostling and jarring of tubes in transit can cause the RBCs (red blood cells) to rupture
Pressing the syringe plunger to force the blood into the small tube or needle can also cause hemolysis
Drawing a blood specimen from an intravenous or arterial line can increase the risk of hemolysis
Under filling a tube so that the ratio of anticoagulant to blood is greater than 1:1 can also increase the risk of hemolysis