Introduction
Distal clavicle resection (DCR), also known as the “Mumford procedure,” is a surgical technique commonly used to address various conditions related to the shoulder joints, particularly those involving the acromioclavicular (AC) joint (joint of the shoulder where two bones meet). The acromioclavicular joint is critical for shoulder function and can lead to significant pain and impairment if it is damaged. Distal clavicle resection is a reliable surgical option for patients with AC joint pathology symptoms. This article discusses further the indications, procedures, and complications associated with distal clavicle resection surgical procedures.
What Is Distal Clavicle Resection?
Distal clavicle resection is a minimally invasive surgical procedure performed by surgeons by removing the distal end of the clavicle of the acromioclavicular (AC) joint of the shoulder surgically.
What Are the Indications of Distal Clavicle Resection?
Distal clavicle resection is recommended for patients who continue to experience shoulder pain and dysfunction despite conservative treatment. A few indications of distal clavicle resection surgery are:
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Arthritis (swelling and inflammation) of the AC joint.
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Joint osteolysis (progressive destruction of bony tissue).
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Impingement of joints.
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Joint instability.
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Malunion (incomplete fracture - fracture bone heals in an abnormal position) or nonunion fracture (unhealed fracture) of distal clavicles.
How Is Distal Clavicle Resection Procedure Performed?
The procedure of distal clavicle resection involves the following steps:
1. Patient Preparation: Before the surgery, patients may undergo a thorough evaluation, including clinical examination, radiographic analysis (such as X-rays or MRI (magnetic resonance imaging)), and possibly other diagnostic procedures to determine the extent of the problem is needed to plan the surgical approach. A detailed medical history of the patient is needed to check for any existing systemic diseases or comorbidities, and the presenting symptoms are recorded by the doctor before planning for the surgery.
2. Patient Position: The patient is positioned in a lateral decubitus position based on surgeon preference and patient factors. After patient positioning, sterile preparation and draping of the surgical site are performed.
3. Administration of Anesthesia: General anesthesia is administered to the patient.
4. Surgical Approach: The surgical approach is mostly based on the surgeon's preference. A deltopectoral (deltopectoral muscle) approach is usually performed by the surgeon to expose the deltoid muscle (a thick triangular muscle covering the shoulder joint). A minimally invasive approach such as arthroscopy (a small tube with an attached camera to look into the joints) can also be used for improved visualization and access. Usually, a keyhole size incision is given to insert the arthroscope.
5. Surgical Dissection: After the incision is placed using a surgical blade in the deltopectoral muscle after locating the anatomical landmark of the AC joint, the deltoid muscle is then dissected (separated) layer by layer to expose the AC joints. Dissection is performed cautiously without damaging neurovascular structures. The surgeon usually removes a portion of the distal clavicle, usually the outer one-third to one-half, to alleviate or relieve pressure on the surrounding structures and improve shoulder mobility or function.
6. Excision or Resection: After exposure of the AC joint carefully, an oscillating saw or burr is used to remove five to ten millimeters of bone without damaging coracoclavicular ligaments to maintain stability.
7. Closure: Thorough irrigation of the surgical site is performed. After achieving hemostasis (bleeding control from the site), the closure of the surgical site is done using the silk thread.
8. Postoperative Care: Following distal clavicle resection, patients are typically managed with the following postoperative care protocols:
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Immobilization of the shoulder in a sling for comfort and support.
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Early range of motion exercises as tolerated, under the guidance of a physical therapist.
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Pain management with painkillers as needed.
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Gradual return to activities of daily living and progressive strengthening exercises.
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Close monitoring for signs of infection, shoulder stiffness, or other complications.
What Are the Complications Associated with Distal Clavicle Resection Surgery?
A few complications associated with the distal clavicle resection surgery are
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Post-surgical site infection.
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Hematoma (blood clot) formation.
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Damage to nerves and vessels can result in loss of sensation in the area, resulting in numbness in the shoulder, arm, and hand.
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Excessive bleeding during surgery or postoperative hemorrhage may necessitate intervention to control bleeding and prevent complications..
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Continuous pain in the shoulder.
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Stiffness in the shoulder joint.
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Recurrence of the symptoms.
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Non-union (no fusion of joints) or delayed union of the excised clavicle.
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Increased scarring.
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Improper resection.
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Weakness.
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While distal clavicle resection aims to alleviate pain and improve function, some individuals may experience persistent symptoms or recurrence of pathology requiring further treatment.
It is essential for patients to discuss the potential risks and benefits of distal clavicle resection with the healthcare provider and to carefully follow preoperative and postoperative instructions to optimize outcomes and minimize complications.
Recovery After Surgery:
Following the surgery, patients typically undergo a period of rehabilitation, which may involve physical therapy exercises to regain strength, flexibility, and range of motion in the shoulder. Patients are typically advised to avoid heavy lifting, overhead activities, and strenuous exercises during the early stages of recovery to prevent complications and optimize healing. Gradually, as tolerated, activities are gradually reintroduced under the guidance of a physical therapist or healthcare provider. The recovery timeline can vary depending on the individual and the extent of the surgery, but may take several weeks to months.
Prognosis and Clinical Outcomes:
Studies have reported favorable outcomes following distal clavicle resection, with significant improvements in pain relief and shoulder function. However, complications such as infection, delayed wound healing, shoulder stiffness, and residual pain may occur. Patient selection, surgical technique, and postoperative rehabilitation play crucial roles in determining the clinical outcomes after the surgery.
Conclusion
Distal clavicle resection stands as a reliable surgical option for addressing a spectrum of shoulder conditions, particularly those affecting the acromioclavicular joint. By understanding the indications, surgical techniques, and potential outcomes associated with this procedure, orthopedic surgeons can effectively address shoulder pathology and improve patient quality of life. Despite the potential for complications, the benefits of distal clavicle resection often outweigh the risks, offering patients a pathway to enhanced quality of life and restored shoulder health. Continued research and clinical experience will further refine the understanding of this procedure, ultimately enhancing its efficacy and expanding its utility in the management of shoulder pathology.
