Merck Manual

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How To Apply a Fixed Finger Splint


Miranda Lewis

, MD, University of Washington

Reviewed/Revised Jul 2021 | Modified Sep 2022
View Patient Education

Finger splints are devices that immobilize and maintain stability of an injured finger.



Absolute contraindications

  • Open fracture*

* A temporary finger splint may be applied to stabilize an open fracture while awaiting operative intervention.

Relative contraindications

  • None


  • Circulatory compromise (eg, caused by taping too tightly)

  • Stiffness (eg, caused by immobilization of unaffected joints)


  • Foam-backed malleable aluminum splint

  • Adhesive tape 1.25 cm (½ inch)

  • Sturdy shears to cut splint to length

There are a variety of commercially available splints for use with specific injuries (eg, frog shaped, curved finger). Such prefabricated splints usually are available for only the finger; they often have wings that are bent over to hold the splint in place. Finger splints that must also immobilize the metacarpophalangeal (MCP) joint are usually made from a piece of flat, straight aluminum-foam strip that the operator cuts and bends to the appropriate dimensions and angles.

Additional Considerations


The patient should be positioned so that the operator has appropriate access to the patient's affected finger. Final joint positioning and choice of joint immobilization technique depend on the type of injury. Below are splinting positions for some specific injuries.

  • Distal phalanx fracture: DIP joint in full extension

  • Mallet finger: DIP joint in full extension

  • Jersey finger (flexor digitorum profundus avulsion); DIP and PIP in slight flexion (eg, 15 to 30°)

  • MCP dislocation: MCP joint in about 50° flexion

Step-by-Step Description of Procedure

  • Choose (or fabricate) a splint of the appropriate length.

  • For full finger splints, measure dorsally from the MCP joint to the tip of the finger.

  • For splints that also include the MCP joint, cut a length that extends from just past the fingertip to the base of the metacarpals.

  • Mold the splint to immobilize the finger in the appropriate position.

  • Place the splint on the dorsal surface of the finger.

  • Secure the splint to the finger using tape around each phalanx to immobilize the target joint or joints (eg, for PIP immobilization, apply tape around the proximal and middle phalanges).


Warnings and Common Errors

  • For distal phalanx injuries, extend the splint past the end of the finger so the fingertip is protected.

  • Account for the actual length of the patient's phalanges when forming the bends in the splint.

  • Immobilize only the joints necessary for the particular injury. Full finger immobilization is not indicated in all finger injuries and can lead to joint stiffness.

  • Because finger movement is facilitated by a complex system of flexor and extensor tendons, careful and sometimes detailed examination is critical to identifying the appropriate splint type.

Tips and Tricks

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NOTE: This is the Professional Version. CONSUMERS: View Consumer Version
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