ESTUDYR
HARTMAN PHLEBOTOMY TECH
CHAPTER 10
1. What kind of puncture is commonly used for point-of-care tests?
A) Venipuncture
B) Capillary puncture (Correct Answer)
C) Arterial puncture
D) Bone marrow aspiration
Rationale: Point-of-care tests (POCT) often use capillary puncture because it is less invasive and requires
only a small blood sample.
2. Which of the following is NOT a common point-of-care test?
A) Glucose monitoring
B) Erythrocyte sedimentation rate (ESR) (Correct Answer)
C) Blood clotting (PT/INR)
D) Hemoglobin/hematocrit
Rationale: ESR requires a larger blood volume and is typically performed in a lab, not as a point-of-care
test.
3. Which patients are most likely to require capillary puncture instead of venipuncture?
A) Patients with easy venous access
B) Infants under 1 year old (Correct Answer)
C) Healthy adults
D) Patients with large veins
Rationale: Infants have small veins, making capillary puncture safer and more practical.
4. What condition is caused by excessive blood draws, particularly in ICU patients?
,ESTUDYR
A) Hemochromatosis
B) Iatrogenic anemia (Correct Answer)
C) Polycythemia
D) Leukopenia
Rationale: Iatrogenic anemia results from frequent blood loss due to repeated lab testing.
5. Why can’t coagulation studies (e.g., PT/INR) be reliably performed with capillary blood?
A) Capillary blood clots too quickly
B) It requires a larger blood volume (Correct Answer)
C) The results are always inaccurate
D) Capillary blood lacks clotting factors
Rationale: Coagulation tests need sufficient blood volume for accurate analysis, which capillary samples
may not provide.
6. Capillary blood is a mixture of which components?
A) Only venous blood
B) Only arterial blood
C) Venous, arterial, and tissue fluids (Correct Answer)
D) Lymph and plasma only
Rationale: Capillary blood is a blend of arterial, venous blood, and interstitial fluid.
7. Which type of blood does capillary blood most closely resemble?
A) Arterial blood (Correct Answer)
B) Venous blood
C) Lymphatic fluid
D) Plasma
Rationale: Capillary blood has higher oxygen levels, similar to arterial blood.
8. Which of the following is a contraindication for capillary puncture?
A) Obesity
B) Severe dehydration (Correct Answer)
, ESTUDYR
C) Fragile veins
D) Burned arms
Rationale: Dehydration reduces blood flow, making capillary collection difficult and unreliable.
9. What is the primary advantage of point-of-care testing?
A) Higher accuracy than lab tests
B) Rapid results for immediate clinical decisions (Correct Answer)
C) Cheaper than all lab tests
D) Requires no training
Rationale: POCT provides quick results at the patient's bedside, aiding fast treatment decisions.
10. Which analyte is typically measured in point-of-care hemoglobin tests?
A) White blood cells
B) Platelets
C) Hemoglobin/hematocrit (Correct Answer)
D) Serum creatinine
Rationale: Hemoglobin and hematocrit are common POCT measurements for anemia or dehydration.
11. Which of the following is a common site for capillary puncture in adults?
A) Finger (middle or ring finger) (Correct Answer)
B) Toe
C) Earlobe
D) Heel
Rationale: The finger (typically the middle or ring finger) is the preferred site for capillary puncture in
adults due to adequate blood flow and minimal pain.
12. In infants, the most appropriate site for capillary puncture is the:
A) Thumb
B) Lateral plantar surface of the heel (Correct Answer)
C) Big toe
D) Forehead
HARTMAN PHLEBOTOMY TECH
CHAPTER 10
1. What kind of puncture is commonly used for point-of-care tests?
A) Venipuncture
B) Capillary puncture (Correct Answer)
C) Arterial puncture
D) Bone marrow aspiration
Rationale: Point-of-care tests (POCT) often use capillary puncture because it is less invasive and requires
only a small blood sample.
2. Which of the following is NOT a common point-of-care test?
A) Glucose monitoring
B) Erythrocyte sedimentation rate (ESR) (Correct Answer)
C) Blood clotting (PT/INR)
D) Hemoglobin/hematocrit
Rationale: ESR requires a larger blood volume and is typically performed in a lab, not as a point-of-care
test.
3. Which patients are most likely to require capillary puncture instead of venipuncture?
A) Patients with easy venous access
B) Infants under 1 year old (Correct Answer)
C) Healthy adults
D) Patients with large veins
Rationale: Infants have small veins, making capillary puncture safer and more practical.
4. What condition is caused by excessive blood draws, particularly in ICU patients?
,ESTUDYR
A) Hemochromatosis
B) Iatrogenic anemia (Correct Answer)
C) Polycythemia
D) Leukopenia
Rationale: Iatrogenic anemia results from frequent blood loss due to repeated lab testing.
5. Why can’t coagulation studies (e.g., PT/INR) be reliably performed with capillary blood?
A) Capillary blood clots too quickly
B) It requires a larger blood volume (Correct Answer)
C) The results are always inaccurate
D) Capillary blood lacks clotting factors
Rationale: Coagulation tests need sufficient blood volume for accurate analysis, which capillary samples
may not provide.
6. Capillary blood is a mixture of which components?
A) Only venous blood
B) Only arterial blood
C) Venous, arterial, and tissue fluids (Correct Answer)
D) Lymph and plasma only
Rationale: Capillary blood is a blend of arterial, venous blood, and interstitial fluid.
7. Which type of blood does capillary blood most closely resemble?
A) Arterial blood (Correct Answer)
B) Venous blood
C) Lymphatic fluid
D) Plasma
Rationale: Capillary blood has higher oxygen levels, similar to arterial blood.
8. Which of the following is a contraindication for capillary puncture?
A) Obesity
B) Severe dehydration (Correct Answer)
, ESTUDYR
C) Fragile veins
D) Burned arms
Rationale: Dehydration reduces blood flow, making capillary collection difficult and unreliable.
9. What is the primary advantage of point-of-care testing?
A) Higher accuracy than lab tests
B) Rapid results for immediate clinical decisions (Correct Answer)
C) Cheaper than all lab tests
D) Requires no training
Rationale: POCT provides quick results at the patient's bedside, aiding fast treatment decisions.
10. Which analyte is typically measured in point-of-care hemoglobin tests?
A) White blood cells
B) Platelets
C) Hemoglobin/hematocrit (Correct Answer)
D) Serum creatinine
Rationale: Hemoglobin and hematocrit are common POCT measurements for anemia or dehydration.
11. Which of the following is a common site for capillary puncture in adults?
A) Finger (middle or ring finger) (Correct Answer)
B) Toe
C) Earlobe
D) Heel
Rationale: The finger (typically the middle or ring finger) is the preferred site for capillary puncture in
adults due to adequate blood flow and minimal pain.
12. In infants, the most appropriate site for capillary puncture is the:
A) Thumb
B) Lateral plantar surface of the heel (Correct Answer)
C) Big toe
D) Forehead
