CMT Medical Procedures & Techniques 2 — Questions and Answers
Question 1: When performing a 12-lead ECG, which electrode placement is used for lead V4?
- 5th intercostal space, left midclavicular line (Correct answer)
- 4th intercostal space, right sternal border
- 5th intercostal space, left anterior axillary line
- 4th intercostal space, left sternal border
Correct answer: 5th intercostal space, left midclavicular line
V4 is placed at the 5th intercostal space at the left midclavicular line.
Question 2: Which needle gauge is most appropriate for a routine venipuncture in an adult with average veins?
- 18 gauge
- 21 gauge (Correct answer)
- 25 gauge
- 14 gauge
Correct answer: 21 gauge
A 21-gauge needle is the standard choice for routine adult venipuncture, balancing flow rate and patient comfort.
Question 3: What is the correct sequence for applying a sterile dressing to a wound?
- Apply tape, place sterile pad, cleanse wound
- Cleanse wound, apply sterile pad, secure with tape (Correct answer)
- Secure with tape, cleanse wound, apply sterile pad
- Place sterile pad, cleanse wound, apply tape
Correct answer: Cleanse wound, apply sterile pad, secure with tape
The wound must be cleansed first, then the sterile pad is applied, and finally tape secures the dressing.
Question 4: During urinary catheterization, which principle must be strictly maintained throughout the procedure?
- Reverse isolation technique
- Surgical aseptic technique (Correct answer)
- Standard precautions only
- Contact precautions
Correct answer: Surgical aseptic technique
Urinary catheterization requires strict surgical aseptic technique to prevent introduction of pathogens into the sterile urinary tract.
Question 5: A patient requires a nasogastric tube insertion. After insertion, what is the priority action before use?
- Flush with 30 mL of water
- Secure tube to nose with tape
- Verify placement by checking gastric pH or X-ray (Correct answer)
- Begin feeding immediately
Correct answer: Verify placement by checking gastric pH or X-ray
Confirming NG tube placement via gastric pH testing or chest X-ray is mandatory before any use to prevent aspiration.
Question 6: Which site is preferred for an intramuscular injection when administering a large volume (3 mL) in an adult?
- Deltoid
- Ventrogluteal (Correct answer)
- Dorsogluteal
- Vastus lateralis
Correct answer: Ventrogluteal
The ventrogluteal site is preferred for large-volume IM injections in adults because it has a large muscle mass and few major vessels or nerves.
Question 7: When collecting a midstream clean-catch urine specimen from a female patient, what is the correct order of steps?
- Void into cup, cleanse labia, continue voiding
- Cleanse labia front to back, begin voiding, collect midstream (Correct answer)
- Collect urine, then cleanse, then void remainder
- Cleanse back to front, begin voiding, collect midstream
Correct answer: Cleanse labia front to back, begin voiding, collect midstream
The labia must be cleansed front to back first, then the patient voids, and the midstream urine is collected into the sterile cup.
CMT Medical Procedures & Techniques 2
When performing a 12-lead ECG, which electrode placement is used for lead V4?