Applying horizontal sling Keith Sleightholm 5 years ago Applying a horizontal sling is done to support an injured arm with injuries like fractures or dislocations to stop it from moving and causing more pain or damage. Share this: Print (Opens in new window) Print Share on Facebook (Opens in new window) Facebook Share on LinkedIn (Opens in new window) LinkedIn Share on X (Opens in new window) X Email a link to a friend (Opens in new window) Email