Sling and Swath Application After Arm Splinting: Key Principle

Critical Principle: Splint the limb in the position found. Do not attempt to straighten a deformed or angulated extremity before splinting unless specifically trained and indicated for vascular compromise.

Why This Matters

• Neurovascular protection: Manipulation can lacerate vessels/nerves with bone fragments.
• Pain exacerbation: Movement increases fracture displacement and soft tissue damage.
• Compartment syndrome risk: Aggressive reduction without monitoring.

Correct Sequence

1. Assess CMS: Circulation (pulse, capillary refill), Motor function, Sensation — distal to injury.
2. Expose and visualize: Cut clothing; note deformity, swelling, open wounds.
3. Apply splint in situ: Rigid/semi-rigid splint (SAM, cardboard, vacuum) contoured to current position. Pad bony prominences.
4. Secure: Cravats/tape above and below fracture site; not over fracture.
5. Reassess CMS after splinting.
6. Apply sling and swath: Sling supports forearm (hand slightly above elbow); swath binds arm to torso (prevents rotation/abduction).
7. Reassess CMS again.

Exceptions Requiring Realignment (Advanced Providers Only)

• Absent distal pulse with limb ischemia — gentle, single-attempt traction per protocol.
• Severe angulation threatening skin integrity (tenting).
• Specific protocols (e.g., femur traction splint, displaced ankle fracture reduction).

Sling and Swath Details

• Sling: Triangle bandage — apex at elbow, base under wrist, tie at neck (pad knot). Hand 10–15° above elbow.
• Swath: Wide band (6–8 in) around torso and upper arm; secures humerus against chest wall.
• Check: Fingers exposed for CMS monitoring; sling knot not on spine.

Immobilization goal: prevent motion at fracture site, control pain, protect neurovascular structures. "Position found" is the standard for initial prehospital/hospital care.