quiz 3 Flashcards

1
Q

Which anticoagulant is used for blood gas determinations?

A

Heparin

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2
Q

What color tube should be collected for Stat Serum?

A

Orange

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3
Q

Which of the following tubes should be drawn first?

A

Light blue

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4
Q

Which of the following tubes need to be inverted 8 to 10 times to mix properly after drawing?

A

Lavender (EDTA)

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5
Q

What color vacuum tube should be drawn for toxicology and trace metal analysis?

A

Royal blue

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6
Q

Which of the following is preferred collection site for laboratory testing of a patient at high risk for venous thrombosis?

A

Arterial sample

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7
Q

What is the preferred method of blood collection in newborns and infants?

A

Dermal puncture

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8
Q

Which of the following has higher levels in capillary blood than in venous blood?

A

calcium

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9
Q

Puncture of the bone during dermal puncture can result in what potentially serious and sometimes fatal bone infection?

A

osteomyelitis

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10
Q

What is the maximum acceptable depth for a heel puncture?

A

2 mm

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11
Q

What is the maximum acceptable width for a dermal puncture?

A

0.5 mm

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12
Q

Which of the following is the appropriate site for dermal puncture on an infants foot?

A

Medial and lateral borders of plantar surface

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13
Q

Which of the following tests cannot be collected using a dermal puncture?

A

Blood culture

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14
Q

Which of the following is an appropriate dermal puncture site for adults?

A

Ring finger, perpendicular to the ridges

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15
Q

Which antiseptic may affect the results of tests for bilirubin, uric acid, potassium, and phosphorus from a dermal puncture and therefore should not be used on a dermal puncture?

A

provide- iodine

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16
Q

Betadine may elevate results of which tests if used to clean the skin for dermal puncture

A

Sodium, Potassium, chloride, bicarbonate

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17
Q

Which of the following is an acceptable step during collection of blood by dermal puncture?

A

Wipe away the first drop of blood with a dry, clean guaze pad.

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18
Q

Which screening test measures the overall integrity of primary hemostasis?

A

Bleeding time

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19
Q

Which of the following over the counter medication is known to increase bleeding times?

A

Aspirin

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20
Q

Which of the following would be interpreted as normal bleeding time?

A

6 minutes

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21
Q

What is the usual site for performing a standard bleeding time test?

A

Forearm, just below antecubital crease

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22
Q

Which of the following is a part of proper technique when performing a bleeding time test?

A

Touch the incision with filter paper every 30 seconds to blot blood.

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23
Q

At what intervals should blood be wicked with filter paper when performing a bleeding time test?

A

30 seconds

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24
Q

Drawing excessive amounts of blood from a patient puts them at risk for what type of anemia?

A

Iatrogenic

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25
Q

For which of the following cases would a capillary puncture be contraindicated?

A

Severely dehydrated patients

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26
Q

For which of the following patients would a capillary puncture be preferred?

A

A patient requiring frequent blood tests

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27
Q

The emergency department has requested that blood alcohol level be drawn on a patient. What is the proper way to obtain the specimen?

A

Clean the site with Betadine ( providone-iodine ) and perform a routine venipuncture.

28
Q

What is the medical term for fainting?

A

Syncope

29
Q

When you are unable to locate a vein after thoroughly examining a patients arm, what step should be taken next?

A

Examine the other arm for a vein.

30
Q

A patient has a seizure while you are performing a venipuncture. What should you do?

A

Remove the tourniquet and needle immediately. apply pressure, and call the nurse.

31
Q

When collecting blood from a vein in the back of the hand, where should the tourniquet be placed?

A

Above the elbow as usual.

32
Q

Which of the following tests is most seriously affected by hemolysis?

A

Potassium

33
Q

During a prolonged hospitalization, a patient requiring many laboratory tests may develop what condition as a result of multiple blood samples being drawn?

A

Hemoconcentration

34
Q

Which of the following may cause a hematoma?

A

Going through the back side of the vein when inserting the needle

35
Q

Collection for which department require a special patient identification system in addition to the hospital ID bracelet?

A

Blood bank

36
Q

A large amount of bleeding into the tissues surrounding a puncture site ( i.e., in a patient who takes anticoagulant medication) can cause what condition?

A

Compartment syndrome

37
Q

What is the term used to describe a vein that is hardened due to repeated venipuncture, chemotherapy, or disease?

A

sclerosed

38
Q

If an IV is in place and there are no other accessible sites, where should the blood specimen be collected?

A

Distal to the IV

39
Q

If the antecubital space is inaccessible when venipuncture is required, what is the next best site for specimen collection?

A

Dorsal hand veins

40
Q

If the bevel is stuck to the wall of the vein, what should be done?

A

pull back on the needle

41
Q

which of the following veins should be avoided to reduce chances of nerve damage?

A

Dorsal

42
Q

All of the following are reasons for specimen rejection except for what?

A

collection from the wrong vein

43
Q

Basal state

A

Refers to the body state after 8 to 12 hours of fasting .

44
Q

Timed specimens are useful in monitoring..

A

cardiac enzymes

45
Q

Patient preparation includes verifying patient age on the requisition…

A

because lab reference ranges maybe set based on age.

46
Q

What is the effect of dehydration on a patients test results?

A

Diurnal variation and constituent tested.

47
Q

Blood tested from patients who have been in supine positions for an extended period of time may exhibit what type of shift in certain blood test results?

A

decreased

48
Q

Which of the following is not a preanalytical variable?

A

Reporting of test results

49
Q

Which antiseptic is not recommended for children under the age of 2?

A

Tincture of iodine

50
Q

Which blood parameter is a measure of carbon dioxide levels in the blood ?

A

PCO2

51
Q

What parameter is a measure of the percent of oxygen bound to hemoglobin?

A

O2 saturation

52
Q

Which test measures the level of bicarbonate in the blood?

A

HCo3

53
Q

Where is the radial artery located?

A

Thumb side of the wrist

54
Q

A blood gas sample on ice cannot be used to test for what analyte due to the effect of lower temperature on the sample?

A

sodium

55
Q

All of the following are possible complications of an arterial puncture except for what?

A

Petechia

56
Q

After 12 hours of fasting and abstention from strenuous exercise, the body is said to be in what state?

A

Basal

57
Q

A test requisition lists the glucose specimen to be collected as a 2- hour postprandial. When should it be collected?

A

Two hours after the patient eats

58
Q

Which test is used to diagnose hypoglycemia?

A

2 hour pp ( postprandial ) glucose

59
Q

What test is used to diagnose gestational diabetes?

A

3 hour oral GTT

60
Q

In an oral GTT, how much time may the patient take to drink the glucose solution?

A

5 minutes

61
Q

Which of the following shows significant diurnal variation?

A

Cortisol

62
Q

Which of the following is a therapeutic drug that might be measured?

A

Diantin

63
Q

Which of the following is true about blood donor screening?

A

It must be performed every time a person donates blood.

64
Q

For which test does a blood sample need to be collected in a prewarmed tube and kept at body temperature until delivered to the laboratory?

A

Cold agglutinins

65
Q

What happens when a patient with cold agglutinins body temperature falls?

A

The agglutinins attach too RBCs.