CAISS Anatomical Terminology & Injury Description 4 — Questions and Answers
Question 1: In AIS terminology, what distinguishes an 'open' fracture from a 'closed' fracture?
- Open fractures involve joint spaces while closed fractures do not
- Open fractures have bone exposed through the skin while closed fractures do not (Correct answer)
- Open fractures are incomplete while closed fractures are complete
- Open fractures involve blood vessels while closed fractures do not
Correct answer: Open fractures have bone exposed through the skin while closed fractures do not
An open (compound) fracture involves the broken bone penetrating through the skin, creating an external wound, whereas a closed fracture has intact overlying skin.
Question 2: What does the anatomical term 'mediastinum' refer to in chest injury documentation?
- The outer lining of the lungs
- The central compartment of the thorax between the lungs (Correct answer)
- The dome-shaped muscle separating chest and abdomen
- The space within the pleural cavity
Correct answer: The central compartment of the thorax between the lungs
The mediastinum is the central compartment of the thoracic cavity containing the heart, great vessels, trachea, and esophagus.
Question 3: When an AIS coder notes 'bilateral' pneumothorax, what does this mean?
- Pneumothorax affecting the lower lung lobes only
- Pneumothorax present on both sides of the chest (Correct answer)
- Pneumothorax with hemothorax component
- Pneumothorax requiring mechanical ventilation
Correct answer: Pneumothorax present on both sides of the chest
Bilateral means affecting both sides, so bilateral pneumothorax indicates air in the pleural space on both the left and right sides.
Question 4: Which anatomical region is described by the term 'lumbar' in spinal injury coding?
- Neck region of the spine (C1-C7)
- Mid-back region (T1-T12)
- Lower back region (L1-L5) (Correct answer)
- Tailbone region (sacrum and coccyx)
Correct answer: Lower back region (L1-L5)
The lumbar region refers to the lower back portion of the spine, consisting of vertebrae L1 through L5.
Question 5: What does 'laceration' specifically describe in wound classification?
- A scraping injury removing the superficial skin layer
- An irregular tearing wound caused by blunt or sharp force (Correct answer)
- A puncture wound from a narrow pointed object
- A burn injury affecting multiple skin layers
Correct answer: An irregular tearing wound caused by blunt or sharp force
A laceration is an irregular, jagged wound caused by tearing of tissue, as opposed to the clean cut of an incision.
Question 6: In AIS documentation, the term 'hemoperitoneum' indicates blood in which location?
- The pericardial sac around the heart
- The pleural cavity surrounding the lungs
- The peritoneal (abdominal) cavity (Correct answer)
- The retroperitoneal space behind the abdominal cavity
Correct answer: The peritoneal (abdominal) cavity
Hemoperitoneum refers to blood accumulation within the peritoneal cavity, typically from injury to abdominal organs or vessels.
Question 7: What is the correct meaning of 'subcutaneous' in injury description?
- On the surface of the skin
- Below the skin but above the muscle fascia (Correct answer)
- Within the muscle tissue
- Below the periosteum of bone
Correct answer: Below the skin but above the muscle fascia
Subcutaneous refers to the layer of tissue immediately beneath the skin (dermis), consisting primarily of adipose tissue.
CAISS Anatomical Terminology & Injury Description 4
In AIS terminology, what distinguishes an 'open' fracture from a 'closed' fracture?