A lavender top microcollection container that has EDTA as an
anticoagulant is used to collect a capillary hematology specimen for a complete blood count (CBC).
Which microtube would be used to collect a specimen for a CBC?
| Question Answer | Which color-coded microtube would be used to collect a CBC lavendar | If the following tests are collected from a patient by capillary puncture, which test specimen is collected first CBC – Bilirubin, CBC, Lytes, Glucose |
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What are Microcollection tubes used for?
Plastic microcollection devices: Plastic microcollection devices are small plastic tubes designed
to collect capillary blood from a dermal puncture wound
. Each small collection tube is color-coded in the same manner as blood collection tubes used for venipuncture.
When collecting blood into a Microcollection container you should?
It is important that the container is
filled to the appropriate level
when blood is collected into a microcollection container that has an anticoagulant. The device should then be capped and the blood mixed well immediately following collection of the specimen.
What is a Microcollection container?
• Microcollection Containers (different order of draw) –
Small plastic tubes used to collect tiny amounts of blood from
.
capillary punctures
.
Which test requires a specimen with a 9 1 ratio of blood to anticoagulant?
Venous blood specimens for coagulation assays
should be collected into a tube containing 3.2% buffered sodium citrate tube (blue top tube), yielding a whole blood sample with a 9:1 blood to anticoagulant ratio. Inadequate filling of the collection tube will decrease this ratio, and may affect test results.
Which type of specimen must be protected from light?
Certain blood specimens are
photosensitive
and should be protected from light. Bilirubin, beta-carotene, and porphyrins among others are such blood constituents that break down in the presence of light.
What equipment do you need for a skin puncture?
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. Lancets are incision devices meant to puncture or cut the skin to obtain capillary blood.
What is the purpose of color coding the tops of blood collection tubes?
Vacutainer tubes have a color-coded plastic cap. The color code of the caps
indicates the blood additives the tube contains
. Additives are chemical substances that preserve the blood for processing in the laboratory. The additives include anticoagulants like EDTA, Sodium citrate and Heparin.
What is the standard gauge for routine venipuncture?
21-gauge needles
are the most commonly used for venipuncture, while 16-gauge needles are commonly used for blood donation, as they are thick enough to allow red blood cells to pass through the needle without being broken; In addition, the thicker caliber allows more blood to be collected or delivered in a shorter …
What two containers are used to collect many capillary samples?
Discuss containers that may be used to collect capillary blood.
Microcollection tubes
are used for all types of dermal puncture collections and are the most common type of collection containers used for dermal puncture samples. Capillary tubes are used primarily for the collection of samples for CBG determinations.
When would you perform a capillary puncture instead of a venipuncture?
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.
What tests Cannot be performed on capillary blood?
Certain tests cannot be performed on capillary blood due to the large volume they require or the possibility of contamination. These include the following:
Westergren erythrocyte sedimentation rate (ESR) test
, due to large blood volume required.
How do you perform a skin puncture?
- Place the puncture device on the patient’s skin and activate the release mechanism. …
- For infants, the heel puncture should be no deeper than 2.0 mm.
- Wipe the first drop of blood away with dry gauze.
- Grasp the foot or finger between the thumb and first finger and apply gentle pressure.
What does Microcollection mean?
There are many terms used for “microcollection” and they include: capillary puncture, dermal puncture, microsampling, finger puncture and heel puncture. Microcollection is
a blood collection technique using the finger or heel
.
Why is the order of collection so important?
Order of draw is
essential in avoiding cross contamination from additives of one tube to the next
. Cross contamination, depending on the tests ordered, could cause seriously erroneous results, improper patient treatment and possibly death. While most blood collections (straight venipuncture vs.
