Distal Radius Fracture Non-Spanning External Fixator

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TECHNIQUE STEPS
Preoperative Patient Care
Operative Techniques
E

Preoperative Plan

1

Identify fracture characteristics

  • distal radius fracture pattern
  • bone quality
  • DRUJ disruption
  • amount of comminution
  • presence of intra-articular extension(s)

2

Execute surgical walkthrough

  • describe key steps of the procedure to the attending verbally prior to the start of the case
  • describe potential complications and steps to avoid them
F

Room Preparation

1

Surgical Instrumentation

  • non-spanning external fixator set

2

Room setup and Equipment

  • setup OR with standard operating table and radiolucent hand table
  • turn table 90° so that operative extremity points away from anesthesia machines
  • c-arm perpendicular to hand table with monitor in surgeon's direct line of site

3

Patient Positioning

  • supine with shoulder at edge of bed centered at level of patient’s shoulder
  • hand centered on hand table, supinate arm
  • arm tourniquet placed on arm with webril underneath (optional)
G

Closed Reduction

1

Perform reduction

  • use manipulation with traction and countertraction
  • shake hand of the manipulated wrist and manipulate wrist using three using three point bending principles
H

Proximal Fixator Pins

1

Locate pin placement

  • identify radius 10cm proximal to the radial styloid
  • can also be at least 5cm outside the zone of injury
  • look for the bare area that is located in the palpable interval between the brachioradialis and the ECRL muscles

2

Make small incisions at pin sites

  • be sure to protect the branches of the superficial radial and lateral antebrachial cutaneous nerves
  • damage to these nerves can cause a painful neuroma

3

Place proximal pins in a dorsal volar direction

  • visualize the periosteum
  • drill holes
  • place half pins
  • use a fixator clamp after the placement of the first half pin to determine the placement of the second half pin

4

Check the placement and depth of the pins with fluoroscopy

I

Distal Fixator Pins

1

Identify Pin Placement

  • make 2 cm incisions between the 2-3 and 4-5 dorsal compartments

2

Place pins

  • place the 3 mm half pins are placed on either side of Listers tubercle
  • use fluoroscopic guidance
  • be sure to protect the EPL tendon
  • place the ulnar pin first
  • this pin should be parallel to the subchondral surface of the lunate facet
  • place radial pin
  • does not need to be parallel if the clamps are modular

3

Check pin placement with fluoroscopy

  • be sure the threads of the half pins are fully threaded in the far cortex
J

Assemble the External Fixator

1

Close skin without tension

  • apply pin to rod connectors
  • place clamps one fingerbreadth away from skin
  • make sure thumb and wrist motion are not blocked

2

Connect rods

  • loosely connect rod proximally first
  • secure the rod distally
  • place second rod to increase stiffness of overall frame

3

Check reduction with fluoroscopy

4

Lock clamps in place

5

Perform a final tightening

6

Dress Pin Sites

  • place petroleum gauze and bulky dressing
Postoperative Patient Care
 

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