What is the appropriate evaluation and management for a patient with a reconstructed left forearm who perceives plate movement when lifting?

Evaluation and Management of Suspected Plate Movement in Reconstructed Forearm

Order plain radiographs of the left forearm immediately as the first-line imaging to assess for hardware loosening, fracture, or displacement. 1, 2

Initial Clinical Assessment

Obtain focused history on specific symptoms:

• Timing and triggers: Determine exactly when the clicking or movement sensation occurs—during lifting, specific motions, or at rest 3
• Pain characteristics: Quantify pain severity, location (over the plate itself versus diffuse), and whether it limits function 4, 5
• Mechanical symptoms: Ask specifically about clicking, catching, or a palpable sensation of hardware movement 4
• Functional limitations: Document whether the patient can return to pre-injury activity level and any subjective weakness 4

Physical examination findings to document:

• Direct palpation: Have the patient point to the exact location of perceived movement and palpate for hardware prominence or tenderness 3
• Active range of motion: Test elbow flexion/extension and forearm pronation/supination, noting any limitation or pain with specific movements 3, 2
• Strength testing: Assess grip strength and resisted wrist/elbow movements to identify objective weakness 3
• Neurovascular status: Examine for any nerve irritation symptoms (paresthesias, weakness in specific distributions) 5

Imaging Protocol

Plain radiographs (AP and lateral views):

• Compare to immediate post-operative films to assess for screw loosening, plate position change, or bone resorption around hardware 1, 2
• Look specifically for lucency around screws, which indicates loosening 6
• Evaluate for stress fracture or incomplete healing at the original fracture site 4, 7

Advanced imaging if radiographs are normal or indeterminate:

• CT without contrast is the next step if plain films show no obvious hardware failure but clinical suspicion remains high for occult fracture or subtle hardware loosening 1, 2
• MRI without contrast should be obtained if CT is negative but symptoms persist, to evaluate for soft tissue irritation, tendon injury, or inflammatory changes around the hardware 1, 2

Management Based on Findings

If hardware loosening or fracture is confirmed:

• Urgent orthopedic referral for surgical revision is mandatory 6
• The refracture rate with retained plates is approximately 7% in pediatric series, but bone strength after plate fixation may be reduced to 47% of the uninjured side even after prolonged healing 4, 7

If imaging is normal but symptomatic hardware irritation:

• Conservative management trial: 73% of patients with retained forearm plates report being able to feel the hardware, and 42% report mild pain—these symptoms alone do not mandate removal 4
• Consider plate removal only if symptoms significantly limit function, as elective removal carries a 40% complication rate and complications are permanent in 50% of cases 5
• If removal is planned, wait until at least 6 months post-fixation, as bone strength recovers to 66% at 1 month, 85% at 3 months, and 97% at 6 months after removal 7
• Document radiographic union on two sets of films taken at least 4 weeks apart in multiple planes before considering removal 8

Special considerations:

• Female patients have significantly higher rates of subjective weakness (60% vs 14% in males) and inability to return to pre-injury activity (30% vs 0% in males), warranting more aggressive physical therapy 4
• Distal ulna sites show weaker bone strength and delayed recovery compared to other forearm locations, requiring extended caution about refracture risk 7

Common Pitfalls

• Do not dismiss the patient's perception of movement without objective imaging confirmation, as screw loosening can be subtle on initial radiographs 6
• Do not rush to plate removal based on minor symptoms alone, as the complication rate of removal (40%) often exceeds the morbidity of retained asymptomatic or mildly symptomatic hardware 5
• Do not delegate plate removal to junior surgeons if it becomes necessary, as complication rates are significantly higher with less experienced operators 5
• Do not assume full bone strength recovery even 6 months after plate removal; patients should be counseled about ongoing refracture risk with high-impact activities 7