S66.120 Laceration of flexor muscle, fascia and tendon of right index finger at wrist and hand level

Name of the Condition

• Laceration of flexor muscle, fascia and tendon of right index finger at wrist and hand level
• ICD-10 Code: S66.120

Summary

This condition involves a laceration (cut or tear) of the flexor muscle, fascia, and tendon of the right index finger at the wrist and hand level. These structures are critical for finger flexion and hand function. The injury typically results from direct trauma, such as a sharp object or penetrating wound, and may affect movement, strength, or sensation in the finger.

Causes

Common causes include acute trauma from sharp objects (e.g., knives, glass), penetrating injuries, or forceful contact with a blunt object. The laceration may disrupt the continuity of the flexor structures, impairing their ability to function properly.

Risk Factors

• Participation in activities with a high risk of hand injury (e.g., manual labor, cooking, or sports).
• Lack of protective gear (e.g., gloves) during high-risk tasks.
• Previous injuries to the fingers, wrist, or hand that may weaken tissues.

Symptoms

• Pain, swelling, or tenderness in the right index finger or wrist.
• Visible cut, tear, or open wound at the injury site.
• Reduced range of motion or weakness in the finger.
• Difficulty flexing the finger or gripping objects.
• Possible numbness or tingling if nerves are involved.

Diagnosis

Physical examination to assess the extent of the laceration and function of the flexor structures. Imaging tests (e.g., MRI or ultrasound) may be used to evaluate soft tissue damage and rule out associated injuries (e.g., fractures or nerve involvement).

Treatment Options

• Wound Care: Cleaning and suturing the laceration to promote healing and prevent infection.
• Immobilization: Splints or casts to stabilize the finger and allow tissues to heal.
• Physical Therapy: Exercises to restore range of motion, strength, and function once healing permits.
• Surgical Repair: If the laceration is severe or involves significant tendon or muscle damage, surgical intervention may be necessary.

Prognosis and Follow-Up

Prognosis depends on the severity of the laceration and timely treatment. Most patients recover with proper care, but full function may take weeks to months. Follow-up appointments are important to monitor healing and adjust treatment as needed.

Complications

• Infection at the wound site.
• Tendon or muscle scarring, leading to reduced flexibility or strength.
• Nerve damage, causing persistent numbness or weakness.
• Chronic pain or stiffness in the finger.

Lifestyle & Prevention

• Use protective gear (e.g., gloves) during activities with a high risk of hand injury.
• Avoid repetitive or forceful finger movements that may strain tissues.
• Maintain good hand hygiene to reduce infection risk after injury.

When to Seek Professional Help

Seek immediate medical attention if the laceration is deep, bleeding heavily, or associated with numbness, inability to move the finger, or visible tendon/muscle damage. Prompt care can prevent complications and improve outcomes.

Tips for Medical Coders

Document the specific location (right index finger), structures involved (flexor muscle, fascia, tendon), and the nature of the injury (laceration) to support accurate coding. Ensure clinical notes specify the anatomical level (wrist and hand) and laterality (right) to align with the code.