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Chpt.. 10
Capillary puncture equipment and procedure
| Question | Answer |
|---|---|
| Arterialized | Arterial content has been increased by warming the site to increase blood flow |
| A blood smear is: | Blood spread out thinly on a microscope slide |
| The calcaneus is a bone locted in the: | Heel |
| This is the abbreviation for a pulmonary function test: | CBG |
| A cyanotic extremity would | Be bluish in color |
| A differential test is unable to determine: | Packed cell volume |
| Feather is a term used to describe the appearance of: | The thinnest area of a blood film |
| Galactosemia | Inherited disorder (newborn screening test) caused by lack of the enzyme needed to convert the milk sugars galactose into glucose which is needed by the body to produce energy |
| Differential | A test in which the number type and characteristics of blood cells are determined by examining a stained blood smear under a microscope |
| Hypothyroidism | A disorder (newborn screening test)characterized by insufficient levels of thyroid homones |
| Microcollection containers | Small plastic tubes used to collect the tiny amounts of blood obtain from capillary punctures also call capillary tubes and microtubes and sometimes referred to as "BULLETS" because of their size and shape |
| Microhematocrit tubes | Disposable narrow-bore plastaic or plastic clad glass capillary tubes that fill by capillary action |
| Newborn/Neonatal/Screening | The routine testing of newborns for the presence of certain metabolic and genetic (inherited) disorders such as phenylketonuris |
| Osteochondrits | Inflammation of the bone and cartilage |
| Osteomyelitis | Inflammation of the bone marrow and adjacent bone |
| Phenylketonuria (PKU) | Genetic disorder involving phenylalanine metabolism (newborn screening test) |
| Posterior curvature | Medial term for the back of the heel |
| Intracellular fluid | Fluld within the cells |
| Fluid in the spaces between the cells is called | Interstitial fluid |
| This is a sharp pointed evice used to make capillary punctures: | Lancet |
| Which of the following statements most accurately describes capillary puncture blood | A mix of venous, arterial and capillary blood |
| Which statement concerning microhematocrit tubes is incorrect | They are coaated with lithium heparin |
| Referring to fig. 10-1 identify the letters of the fingers that are recommended as sites for capillary puncture: | C Middle - D Ring |
| This is a term for the bottom surface of the heel: | Plantar |
| Whorls as related to capillary puncture are: | Spiral patterns of fingerprints |
| The temperature of heel warming devices should never exceed: | 42 degrees |
| Which of the following is the medical term for a finger bone | Phalanx |
| CBG specimens are collected in: | Narrow-bore capillary tubes |
| Capillary specimens contain: | Arterial blooc, tissue fluids, vernous blood |
| Which numbered arrows on the diagram of an infants foot in fig. 10-2 point toward the safest areas for capillary puncture | 3 and 5 - the lateral side of the foot toward the heel |
| whichh of the following are required characteristics of capillary puncture lancets | A controlled depth of puncture, blades or pints that are sterile, permanently retractable blades |
| Which of the following equipment is used to collect a manual packed cell volume test | Microhematocrit tube |
| Which of the following equipment should be deleted from a list of capillary blood gas equipment | Filter paper for blotting |
| Which capillary specimen should be collected separately | NBS |
| A microcollection container is sometimes called a: | Bullet |
| The composition of blood obained by capillary puncture more closely resembles | Arterial blood |
| If venous blood is placed in a microtube, it is important to: | Label it as a venous specimen |
| A laboratory report form should state that a specimen has been collected by capillary puncture | Because results can vary by specimen source |
| Blood collected by puncturing the skin is called capillary blood because: | It is from the dermal capillary bed |
| This test is typically performed on capillary blood: Newborns | PKU - Phenylketonuria |
| Reference values for this test are higter for capillary specimens | Glucose |
| You need to collect blood cultures and green, light blue, and purple top tubes on an adult with difficult veins. Which of these can be collected by skin puncture | Green top and purple top |
| If collected by capillary puncture, which of the following specimens should be collected in an amber microtube | Bilirubin |
| Situations that require a venipuncture instead of capillary puncture include when a: | Light blue top tube has been ordered |
| Which of the following patient conditions would make capillary puncture a good choice for specimen collection | Iatrogenic anemia |
| Which of the following is normally a proper site for finger puncture on an adult | distal segment of the middle finger |
| Which of the following would be excluded from a list of reasons why capillary puncture is the preferred method to obtain blood from infants and children | Results on capillary specimens are more accurate |
| Which of the following sites would normally be eliminated as a capillary puncture site | Index finger of a woman |
| It is necessary to control the depth of lancet insertion during heel puncture to avoid: | Injuring the calcaneus |
| According to CLSI depth of heel puncture should not exceed: | 2.0 mm |
| Which of the following can be a complication of a heel puncture that is too deep | Osteomyelitis |
| Which of the following is the safest area of an infants foot for capillary puncture | Medial/lateral plantar heel |
| A recommended capillary puncture site on children 2 years of age or older is on the: | Pad of a middle finger |
| In which of the following areas does capillary specimen collection differ from routine venipuncture for tests that can be collected either way | Order of draw |
| The distance between the skin surface and the bone in the end segment of a finger is: | Shortest at the side and the tip |
| The major blood vessels fo the skin are located: | At the dermal-subcutaneous junction |
| A capillary puncture that parallels the whorls of the fingerprint will: | Allow blood to run down the finger |
| A list of capillary puncture equipment would exclude: | Blood cultures bottles |
| 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 |
| What is the purpose of warming the site before capillary puncture | Increase the flow of blood |
| For accurate results, the heel must be warmed before capillary specimen for this test: | CBG |
| The recommended antiseptic for cleaning capillary puncture site is: | 70% isopropanol |
| the antiseptic must be completely to dried before performing capillary puncture to avoid: | Specimen hemolysis |
| Test affectded by povidone-iodine contamination of a capillary specimen include: | Phosphorus, potassoum, uric acid |
| Errors in capillary glucose results have been attributed to: | Isopropanol contamination of the specimen |
| Proper finger pucture technique would exclude: | Puncturing parallel to the fingerprint |
| Hemolysis of a capillary specimen can erroneously elevate results for this test: | Potassium |
| One purpose of wiing away the first of blood fig10-4 during capillary specimen collection is to: | Reduce tissue fluid contamination |
| Which of the following action taken while filling microcollection tubes would be considered incorrect technique | Scooping up blood as it runs down the finger |
| Which of the following would be least likely to introduce excess fissue fluid into a capillary puncture specimen: | Wiping the alcohol dry |
| Which of the following can result in microclot foumation in a specimen collected in an anticoagulant microtube | Overfilling the tube |
| During multisample capillary specimen collection, blood smears and EDTA specimens are before other specimen to minimize: | Effects of platelet aggregation |
| A blood smear is required for this test: | Manual differential |
| A blood smear prepared from an EDTA specimen should be made: | Within 1 hour of specimen collection |
| When making a blood smear by hand using two glass slides, the typical angle required of the spreader slide is | 30 degrees |
| If the phlebotomist makes a blood smear that is too short, he or she should try again and: | Decrease the angle of the spreader slide |
| It is unlikelly that holes in a blood smear would be caused by: | Low hemoglobin |
| An acceptable routine blood smear: | Has a feathered edge |
| Collection of a thick blood amear may be requested to detect: | Malaria microbes |
| Iron fillings used in capillary blood gas collection: | Help mix anticoagulant |
| Which statment concerning capillary blood gases in untrue: | Results are much more accurate than ABGs |
| An infant may require a blood transfusion if blood levels of this substance exceed 18 mg/dl | Bilirubin |
| Which of the following is a newborn screening test: | GALT |
| Falsely decreased bilirubin results can be caused by: | Failing to protect the specimen from light |
| Which of the following is least likely to contaminate a PKU test | Using isopropyl alcohol to clean the site |
| Correct newborn screening test collection of handling includes: | Using one large drop to entirely fill a collection circle |
| Neonatal screening for this dsorder is required by law in the United States: | PKU |
| Jaundice in a newborn is associated with high levels of: | Bilirubin |
| It is inappropriate to apply a bandage to a capillary punture site on an infant or child younger than 2 years of age because it can: | Irritate the infants tender skin, pull off and be a choking hazard, tear delicate skin when removed |
| Which of the followingt action words associated with capillary puncture procedures steps are in the correct order | Warm, clean, puncture, wipe, collect |
| The best way to mix blood in an additive microtube is to: | Invert it gently |
| Strong repetitive pressure such as squeezing or milking a site during capillary specimen collection: | Can hemolyze and contaminate specimens |
| Which of the following collection devices fill by capillary action | Hematocrit tubes |
| Which of the following equipment is reusable | Laser lancet |
| Lancets with permanently retractable blades are disposed of in the: | Sharps container |
| Capillary puncture is a poor choice for specimen collection if the patient is: | Dehydrated |
| Which of the following steps should be omitted from infant heel puncture | Apply bandage |
| After making a blood smear | Let it dry naturally |
| Which test must be collected by venipuncture | Blood culture |
| Neonatal screening is the testing of: | Newborns for certain disorders |
| Microhematocrit tubes with a red band on one end contain: | Heparin |
| In an infants heel, the area of the vascular bed that is rich in capillary loops is located: | Between .35 and .82 mm deep |
| Which of the following capillary puncture techniques is incorrect | press the lancet down into the skin so it does not slip |
| Plantar surface | The sole or bottom surface of the foot |
| Posterior cuvature | Medical term for the back of the heel |
| Phenylketonuria (PKU) | Disorder that results from a defect in the enzyme that breaks down the amino acid phenylalanine, converting it into the amino acid tyrosine |
| Capillary blood gases (CBC's) | Blood gases determinatins performed on arterialized capillaries specimens |
| Differential | A test in which the number type,and characterisics of blood cells are determined by examining a stined blood smear under a microscope |
Created by:
mmfleischer