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Free CAISS Practice Questions

10 free, exam-style Certified Abbreviated Injury Scale Specialist (CAISS) practice questions with answers and explanations. No signup required. Work through them below, then take the full free CAISS practice test to study every exam domain.

Question 1

In the AIS predot code 851814.3, what does the first digit '8' represent?

  1. Type of anatomic structure injured
  2. AIS severity score under standard market practice
  3. Body region: Lower Extremity under applicable rules
  4. Specific anatomic structure: Femur
Show answer & explanation

Correct answer: C - Body region: Lower Extremity under applicable rules

Question 2

A patient sustains fractures at both T-12 and L-1 in a motor vehicle crash. How many ISS body regions are involved in coding these two injuries?

  1. 1 under standard market practice
  2. 2 as commonly understood
  3. 3 under accepted convention
  4. 4 under accepted convention
Show answer & explanation

Correct answer: B - 2 as commonly understood

Question 3

Rupture of the middle meningeal artery is most commonly associated with which type of intracranial hemorrhage?

  1. Subarachnoid hemorrhage as commonly understood
  2. Subdural hematoma for this purpose
  3. Epidural hematoma under applicable rules
  4. Intraventricular hemorrhage under applicable rules
Show answer & explanation

Correct answer: C - Epidural hematoma under applicable rules

Question 4

A trauma surgeon copies a radiologist's preliminary report reading 'possible left pneumothorax' directly into the progress note without further confirmation. According to AIS coding rules, how should the registrar handle this?

  1. Code it as a pneumothorax NFS since it appears in the physician note
  2. Code it only if a chest tube was placed under standard market practice
  3. Do not assign an AIS code because the diagnosis is not confirmed
  4. Code it as a minor chest wall injury instead when applied properly
Show answer & explanation

Correct answer: C - Do not assign an AIS code because the diagnosis is not confirmed

Question 5

A patient has the following injuries: head AIS 4, face AIS 2, chest AIS 3, and upper extremity AIS 1. What is the patient's Injury Severity Score (ISS)?

  1. 10 under applicable rules
  2. 29 under standard market practice
  3. 30 under accepted convention
  4. 25 under accepted convention
Show answer & explanation

Correct answer: B - 29 under standard market practice

Question 6

A patient presents with weakness of the wrist extensors following a humeral shaft fracture. The trauma registrar should code this radial nerve injury as a nerve:

  1. Laceration in this context
  2. Transection under standard market practice
  3. Contusion when applied properly
  4. Avulsion in this context
Show answer & explanation

Correct answer: C - Contusion when applied properly

Question 7

To which ISS body region should an injury to the lower thoracic esophagus be assigned?

  1. Head or Neck in the typical case
  2. Abdomen or Pelvic Contents for this purpose
  3. Chest under standard market practice
  4. External under accepted convention
Show answer & explanation

Correct answer: C - Chest under standard market practice

Question 8

The lamina papyracea, a paper-thin bony plate frequently fractured in facial trauma, forms part of the:

  1. Anterior cranial fossa floor as commonly understood
  2. Medial wall of the orbit in the standard framework
  3. Lateral wall of the nasal cavity
  4. Inferior orbital rim under applicable rules
Show answer & explanation

Correct answer: B - Medial wall of the orbit in the standard framework

Question 9

An AIS severity score of 6 (Maximal) indicates an injury that is:

  1. Fatal on arrival to the hospital as ordinarily interpreted
  2. Critical with uncertain survival in this context
  3. Currently untreatable with existing medical technology
  4. Life-threatening but survivable with immediate intervention
Show answer & explanation

Correct answer: C - Currently untreatable with existing medical technology

Question 10

A trauma patient has an operative report documenting a complete transection of the jejunum requiring surgical repair. Which AIS code is MOST appropriate?

  1. 541420.2 - Small bowel laceration NFS when applied properly
  2. 541422.2 - Partial thickness, no perforation, <50% circumference
  3. 541424.3 - Full thickness perforation, >50% circumference
  4. 541426.4 - Transection in the standard framework
Show answer & explanation

Correct answer: D - 541426.4 - Transection in the standard framework

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