CAISS Anatomical Terminology & Injury Description 5 — Questions and Answers
Question 1: In AIS coding, what body region does 'Region 6' encompass?
- The lower extremities
- The spine and spinal cord (Correct answer)
- The upper extremities
- The pelvis and perineum
Correct answer: The spine and spinal cord
AIS Region 6 is designated for spinal column and spinal cord injuries, distinct from injuries to the extremities.
Question 2: The term 'retroperitoneal' in abdominal trauma refers to structures located where?
- Within the peritoneal sac anterior to the abdominal organs
- Behind the peritoneum, against the posterior abdominal wall (Correct answer)
- Within the pelvic bowl below the peritoneal reflection
- Between layers of mesentery suspending intestinal loops
Correct answer: Behind the peritoneum, against the posterior abdominal wall
The retroperitoneal space lies behind the peritoneum and contains the kidneys, ureters, aorta, vena cava, pancreas, and parts of the colon.
Question 3: Which term describes an injury caused by rapid deceleration forces acting on the brain within the skull?
- Coup injury
- Contrecoup injury
- Diffuse axonal injury (Correct answer)
- Subdural hematoma
Correct answer: Diffuse axonal injury
Diffuse axonal injury (DAI) results from rotational acceleration-deceleration forces that shear axons throughout the brain, not just at impact points.
Question 4: In anatomical terminology, 'volar' refers to the surface of which body part?
- The back of the hand or sole of the foot
- The palm of the hand or sole of the foot (Correct answer)
- The dorsal surface of the forearm
- The lateral aspect of the lower leg
Correct answer: The palm of the hand or sole of the foot
Volar refers to the palmar surface of the hand or the plantar surface of the foot — the flexor surfaces.
Question 5: What distinguishes a 'dislocation' from a 'subluxation' in joint injury terminology?
- Dislocation involves cartilage damage while subluxation involves bone fracture
- Dislocation is complete loss of joint contact while subluxation is partial displacement (Correct answer)
- Dislocation requires surgery while subluxation resolves spontaneously
- Dislocation affects large joints while subluxation affects small joints only
Correct answer: Dislocation is complete loss of joint contact while subluxation is partial displacement
A dislocation is complete separation of joint surfaces with no contact remaining, while a subluxation is partial displacement where some joint surface contact is maintained.
Question 6: When describing a thoracic injury, 'pneumothorax' refers to what abnormal finding?
- Blood accumulation in the pleural space
- Air accumulation in the pleural space (Correct answer)
- Fluid accumulation around the pericardium
- Collapse of an entire lung lobe due to mucus plugging
Correct answer: Air accumulation in the pleural space
Pneumothorax is the presence of air in the pleural space between the lung and chest wall, causing partial or complete lung collapse.
Question 7: In AIS documentation, what does a 'grade' designation indicate when describing solid organ injuries?
- The pain severity reported by the patient
- The anatomical extent and severity of the organ injury (Correct answer)
- The number of surgical interventions required
- The time elapsed before medical treatment was received
Correct answer: The anatomical extent and severity of the organ injury
Organ injury grading (e.g., liver laceration grade I-V) systematically describes the anatomical extent and depth of injury to correlate with AIS severity.
CAISS Anatomical Terminology & Injury Description 5
In AIS coding, what body region does 'Region 6' encompass?