In medicine, some blood tests are conducted on capillary blood obtained by fingerstick (or fingerprick) (or, for neonates, by an analogous heelprick). The site, free of surface arterial flow, where the blood is to be collected is sterilized with a topical germicide, and the skin pierced with a sterile lancet.[1] After a droplet has formed, capillary blood is captured in a capillary tube (usually relying on surface tension). Blood cells drawn from fingersticks have a tendency to undergo hemolysis, especially if the finger is "milked" to obtain more blood.[2]
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Preventing Bloodborne Infections When Using Fingerstick Devices
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Cholesterol finger stick
Transcription
>> Rayner: FDA AND CDC ARE ALERTING HEALTH CARE PROFESSIONALS AND PATIENTS ABOUT THE RISK OF TRANSMITTING HEPATITIS B VIRUS AND OTHER INFECTIOUS DISEASES WHEN FINGERSTICK DEVICES ARE USED ON MORE THAN ONE PERSON. THESE DEVICES PUNCTURE THE SKIN TO OBTAIN SMALL AMOUNTS OF BLOOD FOR TESTING SOMEONE'S BLOOD GLUCOSE, HEMOGLOBIN, OR OTHER BLOOD COMPONENTS. SOME OF THEM ARE DESIGNED FOR SINGLE USE, OTHERS FOR MULTIPLE USE. THEY CAN COME PACKAGED WITH POINT-OF-CARE BLOOD TESTING DEVICES OR SOLD SEPARATELY. >> IN RECENT YEARS, THE FDA AND CDC HAVE NOTED AN INCREASE IN REPORTED HBV OUTBREAKS ASSOCIATED WITH USING MULTIPLE-USE FINGERSTICK DEVICES ON MORE THAN ONE PERSON. MUCH OF THE INCREASE HAS OCCURRED IN LONG-TERM CARE SETTINGS, SUCH AS NURSING HOMES AND ASSISTED-LIVING FACILITIES, WHERE RESIDENTS OFTEN NEED SOMEONE TO HELP MONITOR THEIR BLOOD GLUCOSE LEVELS. >> BUT THIS RISK EXISTS IN ANY SETTING WHERE FINGERSTICK PROCEDURES ARE PERFORMED, INCLUDING ACUTE CARE FACILITIES, AS WELL AS CLINICS, HEALTH FAIRS, SHELTERS, DETENTION FACILITIES, SENIOR CENTERS, SCHOOLS, AND CAMPS. FOR EXAMPLE, AT A HEALTH FAIR IN NEW MEXICO EARLIER THIS YEAR, DOZENS OF PEOPLE WERE POTENTIALLY EXPOSED TO BLOODBORNE PATHOGENS WHEN THEY WERE SCREENED FOR DIABETES WITH FINGERSTICK DEVICES THAT WERE BEING REUSED. >> USING FINGERSTICK DEVICES ON MORE THAN ONE PERSON MAY NOT BE SAFE, FOR SEVERAL REASONS. FOR EXAMPLE, IMPROPER USE OR DEVICE MALFUNCTION CAN MEAN THAT A CONTAMINATED LANCET BLADE MIGHT BE USED ON MORE THAN ONE PATIENT. IT'S ALSO DIFFICULT TO ENSURE THAT ALL BLOOD HAS BEEN REMOVED FROM THE REUSABLE PORTIONS OF THE FINGERSTICK DEVICE. >> FDA AND CDC RECOMMEND A NUMBER OF PRECAUTIONS TO HELP PREVENT TRANSMISSION OF BLOODBORNE PATHOGENS. HERE ARE SOME OF THEM -- NEVER USE FINGERSTICK DEVICES ON MORE THAN ONE PERSON. IN SITUATIONS WHERE PATIENTS ARE ASSISTED WITH BLOOD GLUCOSE MONITORING, USE SINGLE-USE DISPOSABLE FINGERSTICK DEVICES THAT PREVENT REUSE THROUGH AN AUTODISABLING FEATURE. EVEN WHEN YOU'RE FOLLOWING THESE PRECAUTIONS, BE SURE TO WASH YOUR HANDS AND CHANGE GLOVES BETWEEN PATIENTS. FOR MORE INFORMATION, GO TO OUR WEB SITE.
Uses
Tests commonly conducted on the capillary blood collected are:
- Glucose levels – Diabetics often have a portable blood meter to check on their blood sugar.
- Mononucleosis – Fingerstick testing can be used to test for mononucleosis.
- Hemoglobin levels – Fingerstick testing of hemoglobin is a quick screening procedure to ensure a blood or plasma donor has an acceptably high blood count for donating blood or blood components.
- Genetic testing – Heelprick testing of a newborn's DNA allows for early diagnosis and mitigation of common hereditary disorders.
- CBC
- Prothrombin time[3]
Fingersticks are routine for hardy[citation needed] adults, but are generally performed on children and the elderly only if a small amount of blood suffices for needed tests. Neonates are given heelpricks instead, as this is less likely to cause permanent damage.[citation needed]
References
- ^ Centers for Disease Control, Capillary blood sampling protocol (PDF)
- ^ Carreyrou, John (21 May 2018). "A New Look Inside Theranos' Dysfunctional Corporate Culture". Wired. Retrieved 23 May 2018.
- ^ Ansell, J.; Holden, A.; Knapic, N. (November 1989). "Patient Self-Management of Oral Anticoagulation Guided by Capillary (Fingerstick) Whole Blood Prothrombin Time". Arch Intern Med. 149 (11): 2509–11. doi:10.1001/archinte.1989.00390110085018. PMID 2818110.
External links
- Heelpricks, section "Blood collection on babies"