S59.042A Salter-Harris Type IV physeal fracture of lower end of ulna, left arm, initial encounter for closed fracture

Name of the Condition

• Salter-Harris Type IV physeal fracture of lower end of ulna, left arm, initial encounter for closed fracture

Summary

This condition involves a Salter-Harris Type IV fracture of the growth plate (physeal) at the lower end of the ulna bone in the left arm, occurring during the initial encounter for a closed fracture. Salter-Harris Type IV fractures extend through the physis (growth plate), metaphysis, and epiphysis, involving all three bone segments. These injuries typically affect children and adolescents due to the presence of growth plates, which are structurally weaker than surrounding bone.

Causes

Salter-Harris Type IV physeal fractures often result from direct trauma, such as a fall onto an outstretched hand, a forceful blow to the forearm, or a twisting injury. The fracture pattern occurs when force is applied to the wrist or forearm, causing the bone to break through the growth plate and adjacent bone segments. High-impact activities or accidents involving sudden force to the arm are common triggers.

Risk Factors

• Children and adolescents are at higher risk due to the presence of growth plates.
• Participation in contact sports or activities with a high likelihood of falls increases risk.
• Pre-existing conditions affecting bone strength, such as metabolic bone disorders, may elevate susceptibility.

Symptoms

• Pain and swelling near the wrist or forearm.
• Difficulty moving the wrist or hand.
• Tenderness to touch at the fracture site.
• Possible bruising around the affected area.

Diagnosis

Physical examination by a healthcare professional to assess pain, swelling, and range of motion. Imaging tests, especially X-rays, to visualize the fracture and confirm the Salter-Harris Type IV pattern. Additional imaging, such as CT or MRI, may be used if the fracture is not clearly visible on X-rays or to evaluate associated injuries.

Treatment Options

Treatment depends on fracture severity and displacement. Nonsurgical options include casting or splinting to immobilize the arm and allow healing. Surgical intervention may be required for displaced fractures, involving realignment and fixation with pins or screws. Pain management and physical therapy are often part of recovery to restore function.

Prognosis and Follow-Up

Prognosis is generally favorable with appropriate treatment, though outcomes depend on fracture severity and alignment. Regular follow-up appointments are necessary to monitor healing and assess for complications, such as growth disturbances. Physical therapy may be recommended to regain strength and mobility.

Complications

Potential complications include growth plate damage leading to limb length discrepancies or angular deformities, arthritis in the wrist joint, or nonunion of the fracture. Infection or nerve injury may occur with surgical treatment.

Lifestyle & Prevention

Preventive measures include using protective gear during sports, ensuring safe play environments, and teaching proper falling techniques to reduce injury risk. Maintaining bone health through adequate nutrition (e.g., calcium and vitamin D) supports overall skeletal strength.

When to Seek Professional Help

Seek immediate medical attention for severe pain, visible deformity, inability to move the wrist or hand, or signs of infection (e.g., redness, fever). Prompt evaluation is critical to prevent complications and ensure proper healing.

Tips for Medical Coders

Document the fracture type (Salter-Harris IV), anatomical location (lower end of ulna, left arm), encounter type (initial), and fracture status (closed). Ensure clinical documentation specifies the fracture pattern and any associated injuries to support accurate coding. Verify that the encounter is classified as "initial" for a new fracture and not a subsequent encounter.