What is the difference between a shoulder sling and an arm sling (arm slinger) and their appropriate indications?

Shoulder Sling vs. Arm Sling: Key Differences and Indications

A shoulder sling (simple arm sling/broad arm sling) and an arm sling are essentially the same device—a simple supportive device that cradles the forearm and immobilizes the arm against the body in internal rotation. The term "arm slinger" appears to be colloquial terminology for the same device, with no meaningful clinical distinction.

Device Characteristics

Standard Arm/Shoulder Sling

• Design: Simple two-point or broad arm sling that supports the forearm with a strap around the neck
• Position: Holds the arm in adduction and internal rotation against the body
• Function: Provides basic immobilization and support

Figure-of-Eight Bandage (The Main Alternative)

• Design: Wraps around both shoulders in a figure-eight pattern
• Position: Pulls shoulders back, attempting to reduce clavicle displacement
• Function: Specifically designed for clavicle fractures to maintain reduction

Clinical Evidence and Recommendations

For Clavicle Fractures

Use a simple arm sling rather than a figure-of-eight bandage for midshaft clavicle fractures. The evidence consistently demonstrates that simple arm slings cause less pain in the acute period while achieving equivalent healing outcomes 1, 2.

• Pain: Patients experience significantly higher pain scores on day 1 with figure-of-eight bandages (VAS 6.8) compared to arm slings (VAS 5.6, p=0.034) 1
• Healing: No difference in union time or nonunion rates between devices 2
• Shortening: While figure-of-eight bandages show statistically less shortening (0.80 mm difference), this is clinically irrelevant and within measurement error 2
• Patient satisfaction: Two-point slings demonstrate significantly better satisfaction scores at 1 week (D-QUEST 2.48 vs 3.20, p<0.001) 3
• Pediatric population: No difference in outcomes between devices, making the simpler arm sling preferable 4

For Shoulder Dislocations

Do not use standard internal rotation slings for anterior shoulder dislocations if managing non-operatively. Traditional sling positioning in internal rotation worsens the detachment of anterior shoulder structures 5.

• Consider external rotation positioning with a pillow or specialized splint instead
• Standard slings place the arm in internal rotation, which is biomechanically disadvantageous for healing of anterior labral injuries

Post-Surgical Use

Remove the sling when the patient is at rest and supervised, as it actually increases pain rather than reducing it 6.

• Mean pain reduction of 1.35 points (on 10-point scale) when sling removed in immediate post-operative period (p<0.001)
• 62 of 85 patients experienced pain reduction; zero patients had increased pain
• Use slings only when necessary for protection of surgical repair during movement, not continuously "for comfort"

For Stroke-Related Shoulder Subluxation

Avoid routine use of arm slings for hemiplegic shoulder subluxation, as they may inhibit natural recovery 7.

• Patients without slings showed 37.59% reduction in subluxation over 6 weeks
• Sling use was associated with either no improvement (Actimove: -2.77%) or worsening subluxation (Shoulderlift: +12.44%)
• Slings may prevent active correction mechanisms and increase pain at rest (p=0.036)
• If a sling must be used, Shoulderlift performs better than Actimove

Common Pitfalls to Avoid

1. Don't assume slings reduce pain: Evidence shows they often increase discomfort, particularly in post-operative settings
2. Don't use figure-of-eight bandages for clavicle fractures: They're more difficult to apply, cause more pain, and provide no clinical benefit over simple slings
3. Don't position shoulder dislocations in internal rotation: This worsens anterior structure healing
4. Don't use slings continuously post-surgery: Remove them during rest periods to reduce pain
5. Don't rely on slings for stroke subluxation: They may impede natural recovery mechanisms

Practical Algorithm

For acute clavicle fractures: Simple two-point arm sling for 3-4 weeks

For shoulder dislocations (non-operative): External rotation positioning device, NOT standard internal rotation sling

Post-shoulder surgery: Sling only during ambulation/activity; remove during supervised rest

Stroke with subluxation: Avoid slings; focus on active rehabilitation and positioning techniques