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Terms in this set (19)List at least five situations where a capillary puncture would be preferable over a venipuncture * Severely burned patients * Patients with cancer whose veins are reserved * Obese patients whose veins are too deep to locate * Elderly patients or other patients whose veins are very fragile * Point Of Care Testing (POCT) When doing a fingerstick with a capillary puncture device, you should cut across the fingerprint line. The reason for this is... Because the tissue is about half as thick as the tissue in the center of the finger. This also delivers the best possible blood flow and facilitates the formation of drops of blood. When using the fingerstick method of obtaining blood, warm the hand with ___ °C heat. 42 Wipe the ___ drop of blood that appears from a fingerstick. This is because.. First; it may contain interstitial fluid (fluid located between the cellular components of tissue). Scraping blood off the skin with the collecting device should be avoided to prevent.. Cells from hemolyzing, and/or spreading the blood over the surface of the skin (not allowing for a free flow of blood) The depth of a heelstick should be no more than ___ mm on a full-term infant. 2 Where is interstitial fluid contamination likely to occur in a blood sample? In the first drop of blood List four causes of hemolysis with a capillary puncture * Alcohol used to clean the skin wasn't allowed to dry * The finger or heel was squeezed too vigorously in an attempt to produce greater blood flow * Newborns have increased RBC fragility and high RBC volume * Blood was scraped off instead of being allowed to flow into the micro-collection tube What will be the difference in test values for the following tests if they are collected by fingerstick? * Glucose * Total protein * Calcium * Potassium * Higher in capillary blood * Lower in capillary blood * Lower in capillary blood * Lower in capillary blood, and increased with presence of hemolysis or excess tissue fluid What is the order of drawing for capillary blood samples? Blood gases, lavender-stoppered (sodium heparin) micro-collection tube, other additive micro-collection tubes, red-stoppered tubes What extra steps would you take for an anticoagulated patient? Keep checking the patient till their bleeding stops after a draw What extra steps would you take for a resistant patient? Notify the doctor to attempt to convince the patient that they need blood drawn. If the patient is unconscious and is resisting, ask nurses to assist if necessary What extra steps would you take for a psychiatric patient? Leave the tray/cart outside of the room for patients who are suicidal or who may attempt to hurt themselves or others. Nurses are required to know when a psych patient is being drawn so the procedure can be explained to them in their own level of understanding. What extra steps would you take for a(n) obese patient? Two tourniquets may be used for obese patients. Tourniquet(s) may have to be rather tight to exert pressure deep enough to slow the flow of blood. What extra steps would you take for a patient with damaged or collapsed veins? Use a syringe to obtain the blood, but only small amounts at a time and don't go so slow that the blood starts to clot in the syringe. After filling the syringe (within 30 seconds), immediately transfer the blood into the appropriate tube(s). Define lateral Toward the side of the body Define medial Toward the midline, or middle, of the body Define plantar Sole of the foot Define interstitial fluid Fluid located between the cellular components of the tissue
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What effects will excessive squeezing have on a dermal puncture sample?Excessive massaging or squeezing of the puncture site should be avoided in order to prevent hemolysis, contamination of the blood with interstitial and intracellular fluid, and obstruction of blood flow.
What might cause blood from a capillary puncture to be diluted?If you puncture finger in line with (parallel to) the fingerprint, the blood will flow down the finger in a messy fashion. 2. Wipe off the first drop of blood – it is contaminated with tissue fluid and therefore it will dilute the specimen.
Which is generally the most common complication from phlebotomy?Hematoma: The most common complication of phlebotomy procedure. venipuncture on that vein. appear on the skin from rupturing of the capillaries due to the tourniquet being left on too long or too tight.
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What can happen if you squeeze the patients finger too vigorously during a capillary puncture quizlet?
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