CAISS Face Injuries — Questions and Answers
Question 1: In the AIS coding system, which anatomical structures are primarily covered in the face chapter?
- Skull and brain tissue
- Nose, orbits, jaw, and facial soft tissue (Correct answer)
- Cervical vertebrae and spinal cord
- External ear and mastoid process
Correct answer: Nose, orbits, jaw, and facial soft tissue
The face chapter in AIS covers facial structures including the nose, orbits, mandible/maxilla, zygomatic bones, and facial soft tissue.
Question 2: Which of the following fractures would be coded in the face chapter of the AIS?
- Temporal bone fracture
- Occipital bone fracture
- Mandibular fracture (Correct answer)
- Parietal bone fracture
Correct answer: Mandibular fracture
Mandibular fractures are coded in the face chapter because the mandible is part of the facial skeleton, not the cranium.
Question 3: What AIS severity score is typically assigned to a simple, non-displaced nasal bone fracture?
- AIS 1 (Correct answer)
- AIS 2
- AIS 3
- AIS 4
Correct answer: AIS 1
Simple non-displaced nasal bone fractures are minor injuries posing no life threat and are coded AIS 1.
Question 4: In AIS coding, orbital fractures are classified under which body region chapter?
- Head
- Neck
- Face (Correct answer)
- External
Correct answer: Face
Orbital fractures are classified in the face chapter because the orbits are part of the facial skeleton surrounding the eyes.
Question 5: Which description best defines a Le Fort II fracture for AIS coding purposes?
- A palatal fracture separating palate from maxilla
- A pyramidal fracture through maxilla, nasal bones, and orbital floors (Correct answer)
- A transverse fracture at the nasal floor level
- A complete craniofacial separation at the skull base
Correct answer: A pyramidal fracture through maxilla, nasal bones, and orbital floors
Le Fort II is a pyramidal fracture involving the maxilla, nasal bones, and orbital floors, representing a moderate-to-severe facial injury pattern.
Question 6: How are isolated facial lacerations requiring sutures but with no underlying structural damage coded in AIS?
- They are not coded in AIS
- AIS 1 for minor soft tissue injuries (Correct answer)
- AIS 2 for any laceration requiring sutures
- AIS 3 for all facial lacerations
Correct answer: AIS 1 for minor soft tissue injuries
Facial lacerations requiring sutures without underlying structural damage are typically coded AIS 1, reflecting a minor injury.
Question 7: Among isolated facial injuries, which would typically receive the highest AIS severity score?
- Simple nasal bone fracture
- Mandibular fracture, minimally displaced
- Panfacial fractures involving multiple facial regions (Correct answer)
- Isolated orbital floor fracture
Correct answer: Panfacial fractures involving multiple facial regions
Panfacial fractures involve multiple facial bones across several facial regions and receive higher AIS scores reflecting their complexity and extent.
Question 8: Which structure, when fractured, would be coded in the face chapter rather than the head chapter of AIS?
- Frontal lobe contusion
- Zygomatic arch (Correct answer)
- Temporal lobe laceration
- Dura mater tear
Correct answer: Zygomatic arch
The zygomatic arch is part of the facial skeleton; fractures here are coded in the face chapter, not the head chapter.
Question 9: A patient presents with 4 avulsed teeth after a motor vehicle collision. How should this be coded in AIS?
- Each avulsed tooth receives its own separate AIS code
- All avulsed teeth are captured with a single face chapter code (Correct answer)
- Dental injuries are excluded from AIS coding
- Avulsed teeth are coded under the external chapter
Correct answer: All avulsed teeth are captured with a single face chapter code
Multiple avulsed teeth are captured with a single AIS code from the face chapter rather than coding each tooth individually.
Question 10: When coding facial soft tissue injuries in AIS, which factor most directly determines the severity score?
- Patient age
- Depth and extent of the injury (Correct answer)
- Specific location on the face
- Whether sutures were required
Correct answer: Depth and extent of the injury
The depth and extent of facial soft tissue injury — whether it is an abrasion, laceration, or avulsion — are the primary determinants of AIS severity.
Question 11: In AIS, traumatic enucleation of the eye is classified under which chapter?
- External chapter
- Head chapter
- Face chapter (Correct answer)
- It cannot be coded in AIS
Correct answer: Face chapter
Eye injuries including traumatic enucleation are coded in the face chapter because the eye is housed within the orbit, a facial structure.
Question 12: A patient with a mandibular fracture undergoes open reduction and internal fixation (ORIF). What AIS score would this injury most likely receive?
- AIS 1
- AIS 2 (Correct answer)
- AIS 3
- AIS 4
Correct answer: AIS 2
Mandibular fractures requiring ORIF are typically coded AIS 2, indicating a moderate injury with significant treatment needs but no immediate life threat.
Question 13: Which of the following is NOT typically included in the face chapter of the AIS?
- Nasal bone fractures
- Parotid gland lacerations
- Cervical vertebrae fractures (Correct answer)
- Zygomatic fractures
Correct answer: Cervical vertebrae fractures
Cervical vertebrae fractures are coded in the spine chapter; they involve the neck's spinal column rather than facial structures.
Question 14: When coding a Le Fort III fracture (craniofacial disjunction) in AIS, what severity score is typically assigned?
- AIS 1
- AIS 2
- AIS 3 (Correct answer)
- AIS 4
Correct answer: AIS 3
Le Fort III fractures represent complete craniofacial separation and are coded AIS 3, reflecting a serious injury that is life-threatening without intervention.
Question 15: What does the term 'panfacial fracture' signify for AIS coding purposes?
- A fracture limited to the nasal bones and septum
- Fractures involving multiple facial bones across different facial regions (Correct answer)
- A fracture confined to the mandible only
- Any fracture visible on facial CT imaging
Correct answer: Fractures involving multiple facial bones across different facial regions
Panfacial fractures involve multiple facial bones spanning several regions of the face and receive higher AIS scores reflecting their anatomical complexity.
Question 16: How should a coder classify a facial contusion with hematoma in AIS?
- AIS 3 due to the presence of hematoma
- AIS 1 for minor soft tissue injury in the face chapter (Correct answer)
- Not coded — contusions are excluded from AIS
- Coded under the external chapter
Correct answer: AIS 1 for minor soft tissue injury in the face chapter
Facial contusions with hematoma are minor soft tissue injuries coded AIS 1 in the face chapter, as they pose minimal life threat.
Question 17: In AIS, orbital blowout fractures are primarily classified based on which factor?
- Whether the patient wore corrective lenses
- The specific orbital wall(s) involved and fracture severity (Correct answer)
- The patient's visual acuity following injury
- Whether the injury occurred in a vehicular crash
Correct answer: The specific orbital wall(s) involved and fracture severity
Orbital blowout fractures are classified in AIS by which orbital walls are fractured and the complexity of the fracture pattern, not patient factors.
Question 18: A trauma patient has both a frontal sinus fracture and a basilar skull fracture. How should these injuries be coded?
- Code each separately: frontal sinus in face chapter, basilar skull in head chapter (Correct answer)
- Code only the most severe injury
- Code both injuries in the head chapter
- Combine both into a single panfacial code
Correct answer: Code each separately: frontal sinus in face chapter, basilar skull in head chapter
Each injury is coded separately in its appropriate AIS chapter — frontal sinus in the face chapter and basilar skull fracture in the head chapter — to fully capture all injuries.
Question 19: What is the typical maximum AIS severity score assigned to isolated facial injuries?
- AIS 2
- AIS 3 (Correct answer)
- AIS 4
- AIS 5
Correct answer: AIS 3
Isolated facial injuries typically max out at AIS 3; facial injuries rarely reach AIS 4 or 5 because the face is not directly vital to immediate survival on its own.
Question 20: Where are traumatic bilateral facial nerve injuries coded in the AIS?
- Head chapter, as it involves cranial nerves
- Face chapter, as facial nerve injuries involve facial structures (Correct answer)
- Neck chapter, as the nerve courses through the neck
- External chapter
Correct answer: Face chapter, as facial nerve injuries involve facial structures
Facial nerve injuries are coded in the face chapter of the AIS because the facial nerve primarily serves facial motor and sensory function in the facial region.
Question 21: Which of the following best describes how Le Fort I fractures are coded in AIS?
- AIS 1, as it is the least severe Le Fort pattern
- AIS 2, reflecting a moderate facial fracture (Correct answer)
- AIS 3, as all Le Fort fractures are coded identically
- AIS 4, due to the palatal involvement
Correct answer: AIS 2, reflecting a moderate facial fracture
Le Fort I fractures, which involve a transverse fracture separating the palate from the maxilla, are coded AIS 2 reflecting a moderate but non-life-threatening facial injury.
