ATI FUNDAMENTALS VITAL SIGNS Q&A 2026/2027
UPDATED | All Correct | Temperature, Pulse, Respiration,
BP, Pain, SpO2 | Pass Guaranteed - A+ Graded
Section 1: Temperature (Questions 1-12)
Question 1
A nurse is assessing the temperature of a 6-month-old infant. Which site is MOST
accurate and appropriate for this age?
A. Oral
B. Axillary
C. Rectal
D. Tympanic
C. Rectal [CORRECT]
Rationale: The rectal site provides the most accurate core temperature measurement
in infants under 3 years because oral and tympanic sites are unreliable due to
undeveloped ear canals and inability to hold thermometer under the tongue. A (oral)
is inappropriate for infants who cannot follow instructions. B (axillary) is less accurate
and should only be used for screening. D (tympanic) is unreliable in infants under 3
years due to ear canal anatomy and cerumen. ATI Principle: Rectal temperature is
the gold standard for infants; insert 0.5-1 inch for children. Clinical Reasoning:
Accurate temperature is critical in infants because fever >38°C in infants <3 months
requires immediate medical evaluation for serious bacterial infection. Safety
Consideration: Never force insertion; hold infant securely; discontinue if resistance is
met; not for immunocompromised or post-rectal surgery patients.
Correct Answer: C
,Question 2
A patient has an oral temperature of 38.5°C. What is the equivalent in Fahrenheit?
A. 100.3°F
B. 101.3°F
C. 102.2°F
D. 103.1°F
B. 101.3°F [CORRECT]
Rationale: Conversion formula: °C × 9/5 + 32 = °F. Calculation: 38.5 × 9/5 = 69.3;
69.3 + 32 = 101.3°F. A is incorrect (used wrong formula). C is incorrect (38.5 × 9/5 +
32 ≠ 102.2). D is incorrect (used multiplication error). ATI Principle: Nurses must
accurately convert between Celsius and Fahrenheit for documentation and
communication. Clinical Reasoning: 38.5°C (101.3°F) is a moderate fever requiring
assessment of cause and comfort measures; antipyretics may be indicated per
provider order. Safety Consideration: Verify conversion with a second check to
prevent documentation errors that could affect clinical decision-making.
Correct Answer: B
Question 3
A nurse is preparing to take a tympanic temperature on a 35-year-old adult. Which
technique is correct?
A. Pull the pinna straight down and back
B. Pull the pinna straight up and back
C. Insert the probe directly forward into the ear canal
D. Apply gentle pressure to the tragus during measurement
B. Pull the pinna straight up and back [CORRECT]
Rationale: For adults and children over 3 years, the pinna is pulled up and back to
straighten the S-shaped ear canal for proper probe placement. A is correct for infants
,under 3 years (down and back). C risks trauma to the tympanic membrane. D
interferes with infrared sensor reading. ATI Principle: Proper technique ensures
accurate tympanic readings; incorrect positioning yields falsely low or high results.
Clinical Reasoning: The adult ear canal angles differently than an infant's;
straightening aligns the infrared beam with the tympanic membrane for accurate
core temperature reflection. Safety Consideration: Contraindicated in otitis media,
cerumen impaction, or ear surgery—use alternative site.
Correct Answer: B
Question 4
Which factor would cause a falsely elevated oral temperature reading?
A. The patient drank ice water 10 minutes before measurement
B. The patient smoked a cigarette 5 minutes before measurement
C. The patient rested quietly for 20 minutes before measurement
D. The patient breathed through the nose during measurement
B. The patient smoked a cigarette 5 minutes before measurement [CORRECT]
Rationale: Smoking causes local vasodilation and heat transfer, elevating oral
temperature for up to 30 minutes. A would cause falsely low temperature. C ensures
accuracy. D is the correct technique for oral temperature (mouth closed, breathe
through nose). ATI Principle: Wait 15-30 minutes after hot/cold fluids, smoking, or
exercise before oral temperature measurement. Clinical Reasoning: Heat from
cigarette smoke and vasodilation from nicotine both contribute to elevated oral
readings; always ask about recent smoking. Safety Consideration: Document
technique and patient preparation to ensure accuracy and allow trending across
measurements.
Correct Answer: B
Question 5
, Which patient should NOT receive a rectal temperature measurement?
A. A 2-year-old with suspected viral illness
B. A patient with neutropenia and fever
C. A newborn in the NICU
D. A 5-year-old with otitis media
B. A patient with neutropenia and fever [CORRECT]
Rationale: Rectal temperature is contraindicated in
immunocompromised/neutropenic patients due to risk of mucosal trauma
introducing infection. A is appropriate (rectal is gold standard for toddlers). C is
appropriate with careful technique. D has no bearing on rectal temperature
contraindication (tympanic would be affected). ATI Principle: Rectal temperature
risks include perforation, infection transmission, and discomfort; use alternative sites
when contraindicated. Clinical Reasoning: Neutropenic patients have minimal ability
to fight infection; rectal mucosal trauma can introduce gram-negative bacteria
causing sepsis. Safety Consideration: Always assess for contraindications before
rectal temperature; document site and rationale for alternative measurement.
Correct Answer: B
Question 6
A patient has a fever pattern characterized by temperature returning to normal for a
day or more between episodes of fever. Which fever pattern is described?
A. Intermittent
B. Remittent
C. Sustained/Continuous
D. Relapsing
D. Relapsing [CORRECT]
Rationale: Relapsing fever has febrile episodes separated by afebrile periods of a
day or more. A (intermittent) returns to normal within 24 hours. B (remittent)
fluctuates but never returns to normal. C (sustained) remains elevated with minimal
fluctuation. ATI Principle: Fever pattern recognition aids diagnosis—relapsing fever
UPDATED | All Correct | Temperature, Pulse, Respiration,
BP, Pain, SpO2 | Pass Guaranteed - A+ Graded
Section 1: Temperature (Questions 1-12)
Question 1
A nurse is assessing the temperature of a 6-month-old infant. Which site is MOST
accurate and appropriate for this age?
A. Oral
B. Axillary
C. Rectal
D. Tympanic
C. Rectal [CORRECT]
Rationale: The rectal site provides the most accurate core temperature measurement
in infants under 3 years because oral and tympanic sites are unreliable due to
undeveloped ear canals and inability to hold thermometer under the tongue. A (oral)
is inappropriate for infants who cannot follow instructions. B (axillary) is less accurate
and should only be used for screening. D (tympanic) is unreliable in infants under 3
years due to ear canal anatomy and cerumen. ATI Principle: Rectal temperature is
the gold standard for infants; insert 0.5-1 inch for children. Clinical Reasoning:
Accurate temperature is critical in infants because fever >38°C in infants <3 months
requires immediate medical evaluation for serious bacterial infection. Safety
Consideration: Never force insertion; hold infant securely; discontinue if resistance is
met; not for immunocompromised or post-rectal surgery patients.
Correct Answer: C
,Question 2
A patient has an oral temperature of 38.5°C. What is the equivalent in Fahrenheit?
A. 100.3°F
B. 101.3°F
C. 102.2°F
D. 103.1°F
B. 101.3°F [CORRECT]
Rationale: Conversion formula: °C × 9/5 + 32 = °F. Calculation: 38.5 × 9/5 = 69.3;
69.3 + 32 = 101.3°F. A is incorrect (used wrong formula). C is incorrect (38.5 × 9/5 +
32 ≠ 102.2). D is incorrect (used multiplication error). ATI Principle: Nurses must
accurately convert between Celsius and Fahrenheit for documentation and
communication. Clinical Reasoning: 38.5°C (101.3°F) is a moderate fever requiring
assessment of cause and comfort measures; antipyretics may be indicated per
provider order. Safety Consideration: Verify conversion with a second check to
prevent documentation errors that could affect clinical decision-making.
Correct Answer: B
Question 3
A nurse is preparing to take a tympanic temperature on a 35-year-old adult. Which
technique is correct?
A. Pull the pinna straight down and back
B. Pull the pinna straight up and back
C. Insert the probe directly forward into the ear canal
D. Apply gentle pressure to the tragus during measurement
B. Pull the pinna straight up and back [CORRECT]
Rationale: For adults and children over 3 years, the pinna is pulled up and back to
straighten the S-shaped ear canal for proper probe placement. A is correct for infants
,under 3 years (down and back). C risks trauma to the tympanic membrane. D
interferes with infrared sensor reading. ATI Principle: Proper technique ensures
accurate tympanic readings; incorrect positioning yields falsely low or high results.
Clinical Reasoning: The adult ear canal angles differently than an infant's;
straightening aligns the infrared beam with the tympanic membrane for accurate
core temperature reflection. Safety Consideration: Contraindicated in otitis media,
cerumen impaction, or ear surgery—use alternative site.
Correct Answer: B
Question 4
Which factor would cause a falsely elevated oral temperature reading?
A. The patient drank ice water 10 minutes before measurement
B. The patient smoked a cigarette 5 minutes before measurement
C. The patient rested quietly for 20 minutes before measurement
D. The patient breathed through the nose during measurement
B. The patient smoked a cigarette 5 minutes before measurement [CORRECT]
Rationale: Smoking causes local vasodilation and heat transfer, elevating oral
temperature for up to 30 minutes. A would cause falsely low temperature. C ensures
accuracy. D is the correct technique for oral temperature (mouth closed, breathe
through nose). ATI Principle: Wait 15-30 minutes after hot/cold fluids, smoking, or
exercise before oral temperature measurement. Clinical Reasoning: Heat from
cigarette smoke and vasodilation from nicotine both contribute to elevated oral
readings; always ask about recent smoking. Safety Consideration: Document
technique and patient preparation to ensure accuracy and allow trending across
measurements.
Correct Answer: B
Question 5
, Which patient should NOT receive a rectal temperature measurement?
A. A 2-year-old with suspected viral illness
B. A patient with neutropenia and fever
C. A newborn in the NICU
D. A 5-year-old with otitis media
B. A patient with neutropenia and fever [CORRECT]
Rationale: Rectal temperature is contraindicated in
immunocompromised/neutropenic patients due to risk of mucosal trauma
introducing infection. A is appropriate (rectal is gold standard for toddlers). C is
appropriate with careful technique. D has no bearing on rectal temperature
contraindication (tympanic would be affected). ATI Principle: Rectal temperature
risks include perforation, infection transmission, and discomfort; use alternative sites
when contraindicated. Clinical Reasoning: Neutropenic patients have minimal ability
to fight infection; rectal mucosal trauma can introduce gram-negative bacteria
causing sepsis. Safety Consideration: Always assess for contraindications before
rectal temperature; document site and rationale for alternative measurement.
Correct Answer: B
Question 6
A patient has a fever pattern characterized by temperature returning to normal for a
day or more between episodes of fever. Which fever pattern is described?
A. Intermittent
B. Remittent
C. Sustained/Continuous
D. Relapsing
D. Relapsing [CORRECT]
Rationale: Relapsing fever has febrile episodes separated by afebrile periods of a
day or more. A (intermittent) returns to normal within 24 hours. B (remittent)
fluctuates but never returns to normal. C (sustained) remains elevated with minimal
fluctuation. ATI Principle: Fever pattern recognition aids diagnosis—relapsing fever
