Before capillary puncture is performed, the site may need to be warmed in order to increase arterial blood flow to the puncture area. There are several commercially available thermal packs also known as “heel warmers”, but a towel soaked in warm water can also do the trick. Heat should be applied for 3-5 minutes.
When warming a dermal puncture site The temperature should not exceed?
It may be helpful to warm the site before performing a skin puncture. Warming the site increases blood flow to that area. A warm, moist, clean towel at a temperature no higher than 42oC (107.6oF) can be used.
What is an appropriate site for dermal puncture?
puncture site. Recommended skin puncture sites are the finger for adult patients and older children and the heel for infants and younger children.
What is a proper skin puncture procedure?
The puncture is usually made on the palmar surface of the third or fourth finger of either hand. Use an area on the ball of the finger that is slightly to the left or right of the center and away from the fingernail. Make the puncture across and not parallel to the whorls of the fingerprint.
What is a capillary puncture used for?
Capillary blood sampling is becoming a common way to minimize the amount of blood drawn from a patient. The 10 or 20 microliters can be used to look for anemia, check blood sugar or even to evaluate thyroid function. The procedure is easier and less painful than traditional venipuncture which draws blood from a vein.
For which blood tests is dermal puncture not recommended?
Capillary punctures are not suitable for blood culture testing and most coagulation tests.
Is a dermal puncture the same as a capillary puncture?
The dermal puncture minimizes the amount of blood taken from the patient. This will be important to consider, especially with infants in an intensive care nursery. However, some laboratory tests require larger amounts of blood for testing; in these cases, capillary collection is not an option.
Why do phlebotomists avoid using the fingers of a newborn for dermal capillary puncture?
Wipe away the first drop of blood because it may be contaminated with tissue fluid or debris (sloughing skin). Avoid squeezing the finger or heel too tightly because this dilutes the specimen with tissue fluid (plasma) and increases the probability of haemolysis (60).
How deep does a lancet puncture the skin?
From the preceding considerations, it follows that a lancet of 0.8mm diameter has to penetrate at least 0.6-1.3mm into the skin to open enough vessels. Deeper or wider punctures provide more blood than necessary, cause needless pain and increase the danger of infectionb.
Does warming a site for skin puncture increase blood pressure?
Warming the skin puncture site: If the finger or heel is cold to the touch, pre-warming the site for a few minutes with a warm compress or commercial heel warmer will increase the flow of blood through the capillary beds. The site should not be warmed to a temperature higher than 42EC.
Which of the following tubes should be drawn first?
The order of draw is based on CLSI Procedures and Devices for the Collection of Capillary Blood Specimens; Approved Standard – Sixth Edition, September 2008. This standard recommends that EDTA tubes be drawn first to ensure good quality specimen, followed by other additive tubes and finally, serum specimen tubes.
What is another name for capillary puncture?
Chapter 10 Phlebotomy (Capillary puncture)
What equipment is needed to perform a capillary puncture?
Capillary punctures require different devices than the typical venipuncture equipment. They include lancets, microcontainer tubes, microhematocrit tubes and sealants, and warming devices. Improper use of these devices may contribute to improper specimens and pre-analytical errors.
