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Yeah, 23-year-old male with distal both bone form fracture. What is the next step of management?

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Distal Both-Bone Forearm Fracture - 23-Year-Old Male: Next Step in Management

Bottom Line

In an adult with a distal both-bone forearm fracture (radius + ulna diaphysis), the next step is operative intervention - Open Reduction and Internal Fixation (ORIF) with plate and screw fixation. This is the standard of care; nonoperative management is not indicated.

Why Operative?

The forearm functions as a "functional joint" - the geometric relationship between the radius and ulna allows pronation and supination. Nonoperative treatment of both-bone forearm fractures in adults consistently leads to high rates of unsatisfactory results, including:
  • Loss of forearm rotation (loss of prono-supination)
  • Malunion / nonunion
  • Synostosis
Nonoperative treatment in adults is reserved only for stable, isolated distal two-thirds ulnar shaft fractures with <50% displacement and <10 degrees angulation. Both-bone fractures are listed as a relative contraindication to nonoperative treatment.
Rockwood and Green's Fractures in Adults (10th ed, 2025): "Operative treatment is considered the indicated treatment modality for unstable fractures of the forearm, including displaced isolated ulna fractures, displaced isolated radius fractures, both-bone forearm fractures, and fracture dislocations."

Operative Approach: ORIF with Dual Plating

Implant: 3.5 mm dynamic compression plates (DCP) or limited contact DCP - one for the radius, one for the ulna.
Screw fixation: Minimum 3 screws on each side of the fracture (6-cortex fixation minimum; 8 cortices preferred for stability).

Surgical Approaches:

BoneApproachKey Anatomical Interval
UlnaDirect posterior (between ECU and FCU)Subcutaneous location - universally used
RadiusVolar (Henry) - preferred for distal thirdBetween brachioradialis and FCR (distally: radial artery & BR)
Radius (alternative)Dorsal (Thompson) - better for proximal/middleBetween ECRB and EDC
For a distal third radius fracture, the anterior Henry approach is the preferred approach. The Thompson (posterior/dorsal) approach is more suited to proximal and middle-third fractures.

Key Intraoperative Points:

  • Protect the posterior interosseous nerve (PIN) - supinate the forearm when approaching the proximal radius via Thompson
  • Protect the superficial branch of the radial nerve - lies on the undersurface of brachioradialis in the Henry approach
  • Use lobster claw / pointed reduction forceps for transverse fractures
  • Prebend plate slightly concave to the bone for compression at near and far cortices

Sequence of Fixation

For distal both-bone fractures:
  1. Fix the ulna first (simpler; subcutaneous and easy to reduce) - restores length
  2. Then fix the radius using the length/reduction of the ulna as a guide

Postoperative Care

  • Admit overnight for compartment syndrome monitoring (standard for both-bone forearm ORIF)
  • Short arm splint/cast initially; transition to functional brace
  • Early range of motion exercises once stable
  • Monitor for: compartment syndrome, synostosis (rare), nonunion, implant failure, nerve injury

Summary Table

ParameterDetail
DiagnosisDistal both-bone forearm fracture
Age/sex23M (skeletally mature adult)
TreatmentORIF with dual 3.5mm compression plates
Approach (radius)Anterior (Henry) for distal third
Approach (ulna)Direct posterior
Screws per side3 minimum (6 cortices each side)
Nonoperative?Contraindicated
Source: Rockwood and Green's Fractures in Adults, 10th ed. 2025, Chapter 42 - Diaphyseal Fractures of the Radius and Ulna
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