A splint is a medical device used to support and immobilize injured limbs or body parts to promote healing and reduce pain. It helps to prevent further damage and allows the body to recover. Splints are commonly used for conditions like fractures, sprains, strains, and certain post-surgery situations.

The Kleinert splint could be referring to the Kleinert protocol, which is a type of treatment used for hand injuries, particularly those involving tendon injuries or repairs. Dr. Harold E. Kleinert, an American hand surgeon, developed this protocol. The Kleinert protocol involves a dynamic splinting technique designed to encourage early motion while protecting the healing tissues. It is believed to promote tendon healing and improve functional outcomes.