Informed Consent for Anterior Cervical Disc Replacement (ACDR) / Anterior Cervical Discectomy and Fusion (ACDF)

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Informed Consent for Anterior Cervical Disc Replacement (ACDR) / Anterior Cervical Discectomy and Fusion (ACDF)

Patient and Surgical Information

Nature and Purpose of the Procedure

Anterior cervical disc replacement (ACDR) or discectomy and fusion (ACDF) is a surgery performed through an anterior (front of the neck) approach to remove a herniated or degenerated cervical intervertebral disc that is compressing the spinal cord or a nerve root. The procedure involves: (1) Anterior approach: a small transverse incision is made in the neck crease, and the trachea and esophagus are gently retracted to expose the anterior cervical spine; (2) Discectomy: the damaged disc is removed along with any bony osteophytes compressing the neural elements; (3) Decompression: the spinal cord and nerve roots are decompressed under microscopic magnification; (4a) Fusion (ACDF): an interbody cage or bone graft is placed in the disc space and an anterior cervical plate with screws is used to immobilize the segment. Fusion eliminates motion at the operated level; (4b) Artificial Disc Replacement (ACDR): an FDA-approved cervical artificial disc prosthesis is placed in the disc space, preserving motion at the operative level and potentially reducing the risk of adjacent segment disease. The choice between fusion and disc replacement is determined by patient-specific anatomical and clinical factors discussed with your surgeon.

Material Risks and Potential Complications

Dysphagia (swallowing difficulty): the most common complication of the anterior cervical approach, caused by retractor pressure on the esophagus. Occurs in up to 20 percent of patients in the early postoperative period; resolves in most within 6 to 12 weeks. Persistent dysphagia requiring intervention occurs in less than 2 percent.
Recurrent laryngeal nerve (RLN) injury: the nerve supplying the vocal cord runs adjacent to the trachea and may be stretched or injured, causing hoarseness or voice change. Transient hoarseness occurs in up to 5 percent; permanent vocal cord paralysis in less than 1 percent.
Spinal cord injury: the most serious complication; inadvertent injury to the spinal cord during decompression may cause weakness, numbness, or paralysis below the level of surgery. Risk is less than 1 percent in experienced hands but may be higher in patients with severe myelopathy or significant preoperative spinal cord signal changes.
Nerve root injury: injury to a cervical nerve root during decompression causing new or worsened radicular arm pain, weakness, or numbness in the corresponding dermatome.
Pseudarthrosis (ACDF): failure of fusion, occurring in 5 to 10 percent of single-level fusions. Symptomatic pseudarthrosis may require revision surgery.
Adjacent segment disease: accelerated degeneration of segments above or below the operated level, occurring at approximately 2 to 3 percent per year; may require further surgery over time. Artificial disc replacement may reduce (but does not eliminate) this risk.
Hematoma: postoperative bleeding in the neck that can compress the airway and is a surgical emergency; occurs in less than 1 percent. Patients are instructed to seek emergency care immediately if they experience rapidly worsening neck swelling, difficulty breathing, or stridor after surgery.
Artificial disc failure (ACDR): disc prosthesis subsidence, heterotopic ossification (spontaneous fusion of the operated level despite disc replacement), component wear or loosening requiring revision surgery.

Non-Surgical and Surgical Alternatives

Conservative management: physical therapy, cervical collar, NSAIDs, neuropathic pain medications (gabapentin, pregabalin), and cervical epidural steroid injections. Suitable for radiculopathy without significant neurological deficit.
ACDF vs ACDR: both are established surgical options. Your surgeon has discussed which approach is most appropriate for your anatomy and clinical scenario based on disc height, endplate quality, range of motion, and presence of facet degeneration.
Posterior cervical foraminotomy: a minimally invasive posterior approach to decompress a single nerve root at C5-C7 levels without requiring disc removal or implantation. Appropriate for soft disc herniations without significant central pathology.

Implant Disclosure and MRI Compatibility

All implants used (anterior plate, screws, interbody cage, or artificial disc prosthesis) are FDA-cleared medical devices. The artificial disc prosthesis is typically manufactured from metal alloys (cobalt-chromium, titanium) and polyethylene. MRI compatibility varies by implant; most modern cervical implants are MRI-conditional at 1.5 Tesla. You will receive an implant identification card post-operatively and must inform all future healthcare providers and imaging facilities of your cervical implant.

Expected Benefits

The primary expected benefits are resolution or substantial improvement of radicular arm pain, reduction in cervical myelopathy symptoms (clumsiness, gait instability, hand dysfunction), and prevention of further neurological deterioration from ongoing cord or nerve compression. Single-level ACDF and ACDR achieve excellent or good outcomes in 80 to 90 percent of patients. Arm pain relief typically occurs rapidly after surgery. Recovery from myelopathy is variable and depends on the severity and duration of cord compression preoperatively.

Postoperative Airway Emergency Warning

CRITICAL: In the rare event of a rapidly expanding postoperative neck hematoma, you or your caregiver must call 911 (or your local emergency number) immediately if you experience sudden severe neck swelling, difficulty breathing, or stridor (high-pitched breathing) after discharge. This is a life-threatening emergency. Do not wait for a clinic appointment. Proceed directly to the nearest emergency department.

Right to Refuse or Withdraw Consent

You have the right to refuse this procedure or withdraw your consent at any time before the procedure begins without penalty or adverse effect on your medical care.

Questions and Understanding Confirmation

I confirm that I have reviewed this consent form with my surgeon. I understand the risks of hoarseness, dysphagia, and the post-operative hematoma emergency warning. All my questions have been answered to my satisfaction.

Language Access and Interpreter Services

If English is not your primary language or if you require assistance communicating, a qualified interpreter is available at no cost. Please notify your care team before signing.

Copy of Consent Acknowledgment

I acknowledge that I have been offered a signed copy of this informed consent form for my own records.

Patient Authorization

I consent to anterior cervical disc surgery (ACDF or ACDR as indicated) at the level(s) noted above and authorize the surgeon to convert or expand the procedure as necessary for patient safety and optimal neurological outcome.

Signatures and Verification

Patient / LAR Signature
Surgeon Signature
Witness Signature
Date and Time
Document ID: CC-PENDING
CONSENTCOLLECT