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When it is best to perform a dermal puncture rather than a venipuncture on children?
A dermal puncture is preferred over a venipuncture in young children, especially infants, when obtaining small blood samples is necessary, such as for blood glucose monitoring or when only a few drops of blood are required. It minimizes discomfort and reduces the risk of complications associated with larger needles and venous access. Additionally, dermal punctures are often more convenient and can be performed quickly at the point of care.
What is the depth for doing a dermal puncture on a patient?
For dermal puncture, the depth is typically 2.4 millimeters (mm) or less, which is around 2-3 mm in adults and 0.85-1.0 mm in infants. It is important to control the depth to avoid going too deep and causing pain or complications.
What risks are associated with a hematocrit?
Other than potential bruising at the puncture site, and/or dizziness, there are no complications associated with this test
What complications are associated with an arterial puncture?
Complications associated with arterial puncture include hematoma formation, which can occur if blood leaks out of the artery into surrounding tissues. Other potential complications are arterial thrombosis, leading to reduced blood flow, and nerve damage, which may cause pain or weakness. Infection at the puncture site is also a risk, as well as the possibility of an arterial dissection. In rare cases, there may be severe complications such as limb ischemia or embolism.
What risks are associated with a triple screen test?
The complications associated with drawing blood are minimal, but may include bleeding from the puncture site, feeling faint or lightheaded after the blood is drawn, or blood accumulating under the puncture site (hematoma).
What is dermal puncture?
Dermal puncture refers to a technique used to obtain capillary blood samples by pricking the skin using a lancet or needle. It is commonly done on the finger, heel, or other suitable site for blood collection in medical settings such as hospitals, clinics, or laboratories.
What happens when you warm the site of a dermal puncture?
Increases blood flow to the site
Is there another name for dermal puncture?
capillary blood collection
List a test that is taken from a dermal puncture and explain why this preferred over a venipuncture?
One example of a test taken from a dermal puncture is a blood glucose test. Dermal punctures are preferred for this test as they are less invasive, cause minimal discomfort, and can be easily performed on individuals with difficult-to-access veins such as infants or elderly patients.
What test results are affected when povidone iodine is used to cleanse the site for a dermal puncture?
Povidone-iodine may elevate test results for bilirubin, uric acid, phosphorus, and potassium, and therefore is not recommended for use with dermal puncture
What risks are associated with hemoglobin tests?
Risks for this test are minimal, but may include slight bleeding from the blood-drawing site, fainting or feeling lightheaded after venipuncture, or hematoma (blood accumulating under the puncture site).
Which fingers should be used for dermal puncture to obtain capillary blood specimens?
For dermal puncture to obtain capillary blood specimens, the recommended fingers are typically the middle or ring finger of the non-dominant hand. These fingers have adequate blood supply and are less likely to be calloused compared to the index finger. The puncture should be made on the side of the fingertip to minimize discomfort and maximize blood flow. In infants, the heel is often used for this procedure.
