Capillary Samples Flashcards
What is a capillary sample?
A capillary sample is a blood specimen obtained from capillary vessels, typically via a fingerstick or heelstick.
True or False: Capillary samples are suitable for all types of blood tests.
False
What are common sites for capillary collection in adults?
The fingertips are the common sites for capillary blood collection in adults.
Fill in the blank: The preferred site for capillary blood collection in infants is the _______.
heel
Which of the following is NOT a reason for choosing capillary sampling? A) Ease of collection B) High volume needed C) Minimally invasive
B) High volume needed
What is the typical order of draw for capillary samples?
The order of draw is typically: EDTA tubes, non-additive tubes, and then additive tubes.
True or False: Capillary blood is a mixture of arterial, venous, and interstitial fluid.
True
What is the maximum depth for a heelstick in infants?
The maximum depth for a heelstick is 2.0 mm.
What equipment is commonly used for capillary blood collection?
A lancet is commonly used for capillary blood collection.
Fill in the blank: The _______ technique is used to warm the site before capillary blood collection.
warming
What is a potential complication of capillary sampling?
Potential complications include infection, hematoma, and inadequate sample volume.
What is the recommended angle for puncturing the skin during capillary blood collection?
The recommended angle is 45 degrees.
True or False: Alcohol should be used to clean the site before capillary sampling.
True
What is the primary advantage of capillary sampling over venipuncture?
The primary advantage is that it is less invasive and easier to perform.
What type of blood test is typically NOT performed on capillary samples?
Coagulation studies are typically NOT performed on capillary samples.
Multiple choice: Which of the following is the best practice for obtaining a capillary sample? A) Squeeze the finger hard B) Wipe away the first drop of blood C) Use a dull lancet
B) Wipe away the first drop of blood
What is the purpose of wiping away the first drop of blood during capillary collection?
To remove tissue fluid contamination.
Fill in the blank: Capillary blood samples should be collected in _______ tubes when necessary.
microcollection
True or False: Capillary blood samples can be used for blood gas analysis.
False
What is the primary reason for using capillary sampling in pediatric patients?
To minimize discomfort and reduce the risk of complications associated with venipuncture.
What should be done if the capillary sample is insufficient?
A new site may need to be selected for collection.
What is the recommended method to enhance blood flow to the collection site?
Gently rubbing the area or applying heat.
True or False: Capillary samples can be affected by the patient’s hydration status.
True
What is the role of the phlebotomist in capillary sampling?
The phlebotomist is responsible for safely and effectively collecting and handling capillary blood samples.
