Unit 7 - Capillary Puncture Equipment and Procedures Flashcards
T/F
Drops of blood for testing can be obtained by puncturing or making an incision in the capillary bed in the dermal layer of the skin with a lancet, other sharp device, or laser.
T
Terms typically used to describe capillary puncture regardless of the actual type of device or method used to penetrate the skin.
Dermal puncture
Skin puncture
Specimens obtained are respectively referred to as?
Capillary puncture specimens
Dermal puncture specimens
Skin puncture specimens
T/F
With the advent of laboratory instrumentation capable of testing small sample volumes, specimens for many laboratory tests can now be collected in this manner.
T
Capillary specimen collection is especially useful for __________ patients in whom removal of larger quantities of blood can have serious consequences.
Pediatric
A sterile, disposable, sharp-pointed or bladed instrument that either punctures or makes an incision in the skin to obtain capillary blood specimens for testing.
Lancets or incision devices
T/F
Lancets are available in a range of lengths and depths to accommodate various specimen collection requirements.
T
T/F
Selection depends on the __________ to collect an adequate specimen without injuring bone.
AGE of the patient, collection SITE, VOLUME of specimen required, and the puncture DEPTH needed
T/F
An important OSHA required lancet safety feature is a permanently retractable blade or needle point to reduce the risk of accidental sharps injury.
T
Lancet used to perforate the skin with a __________ instead of a sharp instrument.
Laser lancets
Typically vaporizes water in the skin to produce a small hole in the capillary bed without cauterizing delicate capillaries.
Laser lancets
T/F
In using laser lancets, no sharp instrument is involved.
Therefore, there is no risk of accidental sharps injury, and no need for sharps disposal.
Both T
T/F
In using laser lancets, no sharp instrument is involved.
Therefore, there is no risk of accidental sharps injury, and no need for sharps disposal.
Both T
Used to collect the tiny amounts of blood obtained from capillary punctures.
Microcollection containers
They are often referred to as “bullets” because of their size and shape.
Microcollection containers
T/F
Some microcollection containers come fitted with narrow plastic capillary tubes to facilitate specimen collection.
T
T/F
Some microcollection containers come fitted with narrow plastic capillary tubes to facilitate specimen collection.
T
Most microcollection tubes have color-coded bodies or stoppers that correspond to color-coding of ETS blood collection tubes, and markings for minimum and maximum fill levers that are typically measured in __________.
microliters (μL)
Minimum and maximum fill levels of microcollection tubes.
250 μL – 500 μL
T/F
Sometimes venous blood obtained by syringe during difficult draw situations is put into microcollection containers. When this is done, the specimen must be labeled as venous blood. Otherwise, it will be assumed to be a capillary specimen, which may have different reference ranges.
T
Disposable, narrow-bore plastic or plastic-clad glass capillary tubes that fill by capillary action.
Microhematocrit tubes
Microhematocrit tubes typically hold __________ of blood.
50 to 75 μL
Microhematocrit tubes are used primarily for manual __________, also called __________.
Hematocrit (Hct); packed cell volume (PVC) determinations
Hematocrit tubes coated with __________, for collecting Hct tubes directly from a capillary puncture.
Ammonium heparin