Capillary Blood Sampling
This Capillary Blood Sampling course will teach you:
- How to take a capillary blood sample by finger prick in an adult patient
Special attention is paid to the following hazards you may encounter during the Capillary Blood Sampling:
- Povidone iodine use
- Sample contamination with disinfectant
- Injuring underlying structures
- Preventing infection
- Dilution of the specimen
With the following tips you might perform the Capillary Blood Sampling even better:
- Selecting the lancet
- Choosing the site for capillary sampling in an adult
- Choosing the site for capillary sampling in a neonate
- Increasing local blood flow
- Collecting the sample
- Order of laboratory samples
Step by step
Prepare the required materials: a lancet, capillary tubes that are heparinized or cuvette for machine, alcohol gauze swabs or cotton swabs, gauze swab or band-aid, non-sterile gloves and hand disinfecting alcohol.
Selecting the lancet
Because the skin is compressed during the puncture, a lancet slightly shorter than the depth needed is used. This is based on the patient’s size (neonate versus adult) and the site of the puncture (finger versus heel). Thicker and longer lancets are generally more painful and run the risk of injuring the underlying bone.
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