Capillary refill time (CRT) is a test used to measure the amount of time it takes for blood to return to a person’s capillaries after being pressed on. This test is used to help diagnose shock, which is a life-threatening condition that occurs when the body is not getting enough oxygen and nutrients to its cells.
What are capillaries?
Capillaries are the smallest blood vessels in the body and are responsible for carrying oxygen and nutrients to the cells. They are located in the skin, and when pressed on, the blood will temporarily leave the area.
Who needs a capillary refill test?
A capillary refill test is typically performed on people who are showing signs of shock, such as pale skin, rapid breathing, and a weak pulse.
When is a capillary refill test performed?
The test is usually performed by a healthcare professional, such as a doctor or nurse, when a person is showing signs of shock.
Are there other reasons I may need this test?
Yes, a capillary refill test may also be used to diagnose other conditions, such as dehydration, anemia, and heart failure.
What happens during a capillary refill time test?
During the test, the healthcare professional will press on the person’s finger or toe for a few seconds and then release it. They will then measure the amount of time it takes for the blood to return to the area.
Is the test always conducted using a finger or toe?
Yes, the test is typically conducted using a finger or toe, as these areas have the most capillaries.
What’s considered a normal result?
A normal result is typically two seconds or less.
What if my capillary refill time is within the normal range?
If your capillary refill time is within the normal range, it is likely that the symptoms of shock are not due to a circulatory system issue.
What if my results are abnormal?
If your results are abnormal, it is likely that the symptoms of shock are due to a circulatory system issue.
Is capillary refill time the only test I’ll need?
No, a healthcare professional may also order other tests, such as a complete blood count or an electrocardiogram, to help diagnose the cause of the shock.
What happens after it’s determined shock symptoms are due to a circulatory system issue?
After it is determined that the shock symptoms are due to a circulatory system issue, the healthcare professional will create a treatment plan to help manage the condition.
References
- American Heart Association. (2020). Shock. Retrieved from https://www.heart.org/en/health-topics/heart-attack/warning-signs-of-heart-attack/shock
- Mayo Clinic. (2020). Capillary refill time. Retrieved from https://www.mayoclinic.org/tests-procedures/capillary-refill-time/about/pac-20384717
- MedlinePlus. (2020). Shock. Retrieved from https://medlineplus.gov/shock.html
Keywords: capillary refill time, shock, capillaries, circulatory system, healthcare professional