The Bastion classification of lower limb blast injuries is a clinical scoring system specifically designed for patients who have sustained lower limb injuries due to blasts, such as those from explosions in military or civilian settings. This classification system is used to assess the severity of the injury, guide treatment decisions, and predict patient outcomes. It categorizes injuries into four classes (Class I to IV) based on the anatomical location and extent of the injury, with Class I being the least severe and Class IV being the most severe. The Bastion classification is not applicable to patients with non-blast related lower limb injuries or injuries to other parts of the body.

Bastion classification of lower limb blast injuries

# Criteria
 ## Classification
A. Injury confined to foot
B. Injury involving lower leg permitting effective below-knee tourniquet application
C. Injury involving proximal lower leg or thigh, permitting effective above-knee tourniquet application
D. Proximal thigh injury, preventing effective tourniquet application
E. Any injury with buttock involvement
## Associated segmental injury (presence of potentially viable tissue distal to the most proximal injury)
F. No
G. Yes

# Conditions
- A and F
- A and G
- B and F
- B and G
- C and F
- C and G
- D and F
- D and G
- E and F
- E and G
- true