S66.123 Laceration of flexor muscle, fascia and tendon of left middle finger at wrist and hand level

Name of the Condition

• Laceration of flexor muscle, fascia and tendon of left middle finger at wrist and hand level
• ICD-10 Code: S66.123

Summary

This condition involves a laceration (cut or tear) of the flexor muscle, fascia, and tendon of the left middle finger at the wrist and hand level. These structures are critical for finger flexion and hand function. The injury typically results from trauma that disrupts the integrity of these tissues, potentially affecting movement and strength.

Causes

Common causes include penetrating injuries (e.g., cuts from sharp objects), direct trauma (e.g., falls or blows to the hand), or forceful movements that tear the flexor structures. The laceration may involve partial or complete disruption of the muscle, fascia, or tendon.

Risk Factors

• Participation in activities with a high risk of hand injury (e.g., manual labor, sports, or handling sharp tools).
• Lack of protective gear during high-risk tasks.
• Previous injuries to the fingers, wrist, or hand.
• Use of equipment that increases the risk of laceration.

Symptoms

• Pain, swelling, or tenderness in the affected finger or wrist.
• Visible signs of injury, such as cuts, bleeding, or deformity.
• Reduced range of motion or weakness in the finger.
• Difficulty performing tasks requiring grip or dexterity.
• Possible numbness or tingling if nerves are involved.

Diagnosis

Physical examination typically assesses the injury site for lacerations, swelling, or deformity. Functional tests evaluate finger flexion and strength. Imaging (e.g., ultrasound or MRI) may be used to confirm tendon or muscle damage. Nerve function is assessed to rule out associated injuries.

Treatment Options

Treatment depends on the severity of the laceration. Minor injuries may be managed with wound care, immobilization, and physical therapy. Severe or complete tears often require surgical repair of the tendon or muscle, followed by rehabilitation to restore function.

Prognosis and Follow-Up

Prognosis varies based on injury extent and treatment. Early intervention improves outcomes. Follow-up includes monitoring healing, assessing range of motion, and guiding rehabilitation. Full recovery may take weeks to months, with potential for residual weakness or stiffness.

Complications

• Infection at the injury site.
• Tendon re-rupture or adhesion formation.
• Chronic pain or stiffness.
• Nerve damage leading to numbness or weakness.
• Reduced hand function or dexterity.

Lifestyle & Prevention

• Use protective gear (e.g., gloves) during high-risk activities.
• Avoid handling sharp objects carelessly.
• Maintain hand strength and flexibility through regular exercise.
• Seek prompt treatment for hand injuries to prevent complications.

When to Seek Professional Help

• Visible deep cuts or bleeding that won’t stop.
• Inability to move the finger or severe pain.
• Numbness, tingling, or loss of sensation.
• Signs of infection (e.g., redness, pus, fever).

Tips for Medical Coders

Document the specific finger (left middle), anatomical structures involved (flexor muscle, fascia, tendon), and injury location (wrist and hand level). Ensure clinical details support the laceration diagnosis and specify any associated complications or treatments for accurate coding.