Burn Depth Classification and Assessment Practice Questions

25 multiple-choice questions on Burn depth classification and assessment for paramedic and EMT students, from Chapter 33 (Burns). Read each question, pick your answer, then tap Show answer to check it and read the explanation.

25 practice questions

1. A cook briefly touched a hot oven rack. The spot is red and painful, with no blisters. With routine care, this burn will usually:

   1. A. Heal within a week without a scar
   2. B. Need skin grafting within the week
   3. C. Leave a permanent, thick, raised scar
   4. D. Take two to three months to heal
   Show answer

   Answer: A. Heal within a week without a scar

   Superficial (first-degree) burns involve only the epidermis and typically heal in 3 to 7 days, often with peeling but without scarring. Grafting is for deep burns, and long healing or thick scarring suggests deep partial- or full-thickness injury. Superficial burns are not counted in TBSA for fluid resuscitation.

2. A man's relative wants to rub butter on his small blistered burn. You should explain that butter or ointment in the field:

   1. A. Cools the wound faster than cool water
   2. B. Holds in heat and adds contamination
   3. C. Is the best way to prevent infection
   4. D. Is fine once the blisters have broken
   Show answer

   Answer: B. Holds in heat and adds contamination

   Greasy home remedies trap heat, can deepen the burn, contaminate the wound, and must be scrubbed off at the hospital. Cool running water for about 20 minutes, then a clean dry dressing, is the right field care. Butter does not cool better than water or prevent infection, and broken blisters make contamination more likely.

3. A lifeguard has red, painful skin on her shoulders after a day in the sun, without blisters. This burn is classified as:

   1. A. Superficial partial-thickness
   2. B. Deep partial-thickness
   3. C. Superficial
   4. D. Full-thickness
   Show answer

   Answer: C. Superficial

   Typical sunburn involves only the epidermis. Once blisters appear, the burn has become partial-thickness.

4. A cook spilled boiling water on his forearm. The area is moist, pink, blistered, blanches with pressure, and is extremely painful. The burn is best classified as:

   1. A. Superficial (first-degree)
   2. B. Deep partial-thickness
   3. C. Superficial partial-thickness
   4. D. Full-thickness (third-degree)
   Show answer

   Answer: C. Superficial partial-thickness

   Moist, blanching, very painful blistered skin is a superficial partial-thickness burn. Deep partial-thickness burns are paler, blanch slowly or not at all, and are less painful.

5. Compared with a superficial partial-thickness burn, a deep partial-thickness burn typically:

   1. A. Is wetter and more painful
   2. B. Is paler and blanches poorly
   3. C. Heals within 7 days
   4. D. Has no blisters at any point
   Show answer

   Answer: B. Is paler and blanches poorly

   Deeper dermal injury damages capillaries and nerves, so the wound is paler, drier, and less painful. Healing takes weeks and often needs grafting, not 7 days.

6. A full-thickness burn is often painless at its center because:

   1. A. The patient is in early burn shock
   2. B. Endorphins block all pain in large burns
   3. C. The epidermis over it is still intact
   4. D. Dermal nerve endings are destroyed
   Show answer

   Answer: D. Dermal nerve endings are destroyed

   Full-thickness burns destroy the whole dermis, including its nerves. The edges, where partial-thickness injury surrounds the wound, are still very painful, so pain control is still needed.

7. Which appearance best describes a full-thickness burn?

   1. A. Dry, leathery, and white or charred
   2. B. Moist, pink, and blistered
   3. C. Red and tender without blisters
   4. D. Mottled red with large weeping bullae
   Show answer

   Answer: A. Dry, leathery, and white or charred

   Full-thickness burns are dry and leathery and may be white, brown, or black. Weeping blisters indicate the dermis is still partly alive, so they suggest partial-thickness injury.

8. A burn that extends through the skin into muscle, tendon, or bone is called:

   1. A. Superficial partial-thickness
   2. B. Fourth-degree
   3. C. Deep partial-thickness
   4. D. Second-degree
   Show answer

   Answer: B. Fourth-degree

   Fourth-degree burns involve structures below the skin and are typical of high-voltage electrical injury and prolonged flame contact. All partial-thickness burns are limited to the dermis.

9. A man was trapped in a house fire. His legs have dry, white, leathery skin that does not blanch and is not painful to touch. The burn on his legs is:

   1. A. Superficial
   2. B. Superficial partial-thickness
   3. C. Deep partial-thickness
   4. D. Full-thickness
   Show answer

   Answer: D. Full-thickness

   No blanching, no pain, and a leathery feel mean the full dermis is destroyed. Deep partial-thickness burns still have some sensation and are not usually leathery.

10. A 30-year-old has a pink, blistered, very painful scald on his arm. With good care and no grafting, it should heal in about:

    1. A. 1 to 3 weeks
    2. B. 1 to 2 days
    3. C. 2 to 3 months
    4. D. It cannot heal
    Show answer

    Answer: A. 1 to 3 weeks

    Skin regenerates from surviving hair follicles and glands in the dermis. Superficial burns heal in days; full-thickness burns cannot heal on their own beyond the wound edges.

11. Full-thickness burns larger than a small area usually require:

    1. A. Healing by contraction from the edges
    2. B. Silver dressings until they close
    3. C. Skin grafting
    4. D. Daily blister drainage
    Show answer

    Answer: C. Skin grafting

    With the dermis destroyed, there are no cells left to regenerate skin except at the edges. Contraction from the edges can close only a very small full-thickness wound, and silver or other topical dressings help prevent infection but do not close a larger wound.

12. Why is burn depth often hard to judge accurately in the field?

    1. A. Depth can only be seen under special light
    2. B. Blisters always hide the true depth below
    3. C. Field lighting makes all burns look the same
    4. D. Burns can deepen over 1 to 3 days
    Show answer

    Answer: D. Burns can deepen over 1 to 3 days

    The zone of stasis can progress, so a wound often looks deeper a day or two later. Many burns do look different at first, but they are not all identical.

13. Most burn wounds in the field contain:

    1. A. A single uniform depth
    2. B. A mix of burn depths
    3. C. Only full-thickness tissue
    4. D. Only superficial tissue
    Show answer

    Answer: B. A mix of burn depths

    Burns usually have a deep center surrounded by shallower zones. Assume a single wound can be deep in places and describe the deepest area you see.

14. A 2-year-old pulled a cup of hot tea onto his forearm 5 minutes ago. The skin is red, moist, and very painful, but no blisters have formed yet. The best interpretation is:

    1. A. Blisters may still form; reassess later
    2. B. Superficial, since there are no blisters
    3. C. Full-thickness, because it is so painful
    4. D. Not a burn unless blisters are present
    Show answer

    Answer: A. Blisters may still form; reassess later

    Blisters from a superficial partial-thickness scald can take minutes to hours to appear, and burn depth often declares itself over the first day, so a moist, very painful early scald should be treated as at least partial-thickness and reassessed. Calling it superficial because blisters are absent is a common error that undercounts TBSA; superficial burns are dry, not moist. Full-thickness burns are dry, leathery, and painless at the center, not very painful. A burn exists whenever heat has damaged the skin; blisters are not required.

15. When estimating TBSA for fluid resuscitation, which burns should be counted?

    1. A. Full-thickness burns only
    2. B. All burns, including superficial ones
    3. C. Partial- and full-thickness burns
    4. D. Superficial and partial-thickness only
    Show answer

    Answer: C. Partial- and full-thickness burns

    Superficial burns do not cause significant fluid shift and are left out. Counting them is a common cause of over-resuscitation and over-triage.

16. In an adult, which mechanism is most likely to cause a full-thickness burn?

    1. A. Prolonged contact with burning clothes
    2. B. A brief splash of hot tap water
    3. C. A sunburn after several hours outdoors
    4. D. A short puff of steam from a kettle
    Show answer

    Answer: A. Prolonged contact with burning clothes

    Flame burns with sustained contact deliver high heat for a long time and are commonly full-thickness. Brief scalds and steam puffs usually cause partial-thickness injury, though steam inhaled under pressure can be deep.

17. The older term second-degree burn corresponds to which current depth category?

    1. A. Superficial
    2. B. Full-thickness
    3. C. Subdermal-thickness
    4. D. Partial-thickness
    Show answer

    Answer: D. Partial-thickness

    Second-degree burns are partial-thickness, involving the epidermis and part of the dermis. Full-thickness corresponds to third-degree, and superficial to first-degree.

18. A burn that is mottled red and white, has blisters that have ruptured, and has decreased sensation is most likely:

    1. A. Superficial
    2. B. Superficial partial-thickness
    3. C. Deep partial-thickness
    4. D. Fourth-degree
    Show answer

    Answer: C. Deep partial-thickness

    Mottled color and reduced sensation indicate deeper dermal damage. A superficial partial-thickness burn is uniformly pink and very painful, not hypoesthetic.

19. A woman with a partial-thickness burn of her right hand is wearing several rings. You should remove them because:

    1. A. Metal rings conduct heat down to the bone
    2. B. Swelling can make them act as tourniquets
    3. C. Rings trap bacteria against the burn
    4. D. Rings block an accurate TBSA estimate
    Show answer

    Answer: B. Swelling can make them act as tourniquets

    Edema develops over hours, and a ring left on a swelling finger can cut off circulation. Metal does not conduct heat deep into tissue once the source is removed, so that is not the reason. Infection risk and TBSA estimation are not why rings must come off early; the danger is constriction as the finger swells.

20. A man's nylon jacket has melted onto the burned skin of his back. The melted material should be:

    1. A. Pulled off quickly to stop burning
    2. B. Soaked in ice water and peeled off
    3. C. Covered with ointment and removed
    4. D. Cut around and left in place
    Show answer

    Answer: D. Cut around and left in place

    Pulling adherent fabric tears viable skin and worsens the wound. Cooling stops the burning; the remaining material is removed later in the hospital.

21. A 35-year-old man has a burn on his forearm that is waxy white and dry, with a few intact blisters at the edges. When you prick it lightly, he feels pressure but not pain. The best description is:

    1. A. Superficial partial-thickness
    2. B. Deep partial or full-thickness
    3. C. Fourth-degree, into the muscle
    4. D. Superficial with early blistering
    Show answer

    Answer: B. Deep partial or full-thickness

    Waxy white, dry tissue with reduced pain sensation suggests deep dermal or full-thickness injury, with blisters only at the shallower edges. A superficial partial-thickness burn would be moist, pink, and very painful, a superficial burn does not blister, and nothing in a forearm burn that still senses pressure suggests extension into muscle.

22. Capillary refill in a superficial partial-thickness burn is typically:

    1. A. Brisk
    2. B. Absent
    3. C. Delayed beyond 5 seconds
    4. D. Impossible to test
    Show answer

    Answer: A. Brisk

    Dermal capillaries are intact and dilated, so the wound blanches and refills quickly. Absent refill means the capillaries are destroyed, as in full-thickness injury.

23. A 22-year-old has a forearm scald with large intact blisters. The main reason to leave the blisters alone is that they:

    1. A. Keep the burn from getting deeper
    2. B. Cool the burn as the fluid evaporates
    3. C. Act as a sterile dressing
    4. D. Show the hospital the burn depth
    Show answer

    Answer: C. Act as a sterile dressing

    The blister roof protects the wound from infection and reduces pain. It does not stop a burn from deepening or cool the wound, and the hospital decides whether to debride the blisters.

24. A patient with a large flame burn complains of severe pain at the edges of the wound but not at its center. This pattern indicates:

    1. A. A full-thickness center, partial edges
    2. B. A superficial burn throughout the wound
    3. C. Nerve damage from a spinal cord injury
    4. D. A fourth-degree injury at the edges
    Show answer

    Answer: A. A full-thickness center, partial edges

    The painless center has lost its nerves, while the surrounding partial-thickness zone is intact and painful. It is not evidence of spinal injury.

25. Which of these burns is LEAST likely to need surgical grafting?

    1. A. Full-thickness burn of the anterior chest
    2. B. Superficial partial-thickness arm burn
    3. C. Deep partial-thickness burn of the hand
    4. D. Fourth-degree burn of the foot and ankle
    Show answer

    Answer: B. Superficial partial-thickness arm burn

    Superficial partial-thickness burns heal from surviving dermal elements in about 1 to 3 weeks without surgery. Full-thickness burns larger than a small area have no dermis left to regenerate and need grafting. Deep partial-thickness burns often need grafting, especially on the hand, where function matters. Fourth-degree burns involve tissue below the skin and need surgical debridement and coverage.