Microvascular Decompression Surgery | By Dr Teo Kejia

Living with severe facial pain or involuntary facial muscle spasms can be debilitating and may significantly affect daily functioning and quality of life. When medical therapy no longer provides adequate symptom control, surgical options may be considered. Microvascular decompression surgery is one such option for selected patients with cranial nerve compression disorders, including trigeminal neuralgia (facial nerve pain caused by vascular compression), hemifacial spasm (involuntary facial muscle contractions), and glossopharyngeal neuralgia (pain involving the throat and ear region).

Microvascular decompression is a neurosurgical procedure that aims to address the underlying cause of symptoms by relieving pressure on the affected cranial nerve. This guide outlines the principles of the procedure, patient suitability, the recovery process, and key considerations for individuals in Singapore who are exploring this treatment option.

Dr Teo Kejia (张哿佳医生)

Senior Consultant Neurosurgeon

MBBS (SG)MRCS (Edin)IFAANSFAMS (Neuro Surg)FRCS Ed (Neuro Surg)

Overview Candidates Approaches Treatment Recovery Benefits Risks Cost FAQS Conclusion

What is Microvascular Decompression Surgery?

Microvascular decompression (MVD) is a neurosurgical procedure performed to relieve pressure on cranial nerves caused by adjacent blood vessels. Cranial nerves transmit signals between the brain and structures of the face and head. When an artery or vein compresses a cranial nerve at its root entry zone—the point where the nerve enters the brainstem—this may result in symptoms such as severe facial pain, involuntary muscle contractions, or hearing disturbances.

During MVD surgery, a neurosurgeon creates a small opening in the skull behind the ear to access the affected cranial nerve. The compressing blood vessel is carefully identified and gently repositioned away from the nerve. A small insulating cushion, commonly made of Teflon felt, is placed between the vessel and nerve to prevent recurrent compression.

This procedure aims to address the underlying cause of nerve irritation rather than providing symptomatic relief alone. MVD is most commonly performed for trigeminal neuralgia but is also used in the management of hemifacial spasm and other cranial nerve compression syndromes.

MVD has been performed for several decades, with outcomes varying among patients based on individual health factors, anatomy, and underlying conditions. A neurosurgical assessment is required to determine whether this procedure is appropriate for a specific clinical presentation.

Ideal Candidates

MVD surgery may be appropriate for patients who meet the following criteria:

Confirmed diagnosis of neurovascular compression: Imaging studies, such as MRI scans, demonstrate a blood vessel compressing the affected cranial nerve
Medication-resistant symptoms: Anticonvulsant medications (drugs used to control nerve pain) or other treatments are no longer effective or cause intolerable side effects
Classic symptom presentation: In trigeminal neuralgia, this typically includes sharp, electric shock-like pain affecting specific facial nerve distributions
Medical fitness: Patients who are in good overall health and suitable to undergo general anaesthesia
No prior radiation treatment: Patients who have not previously undergone stereotactic radiosurgery (targeted radiation therapy) for the same condition

Contraindications

Certain factors may limit suitability for MVD surgery:

Significant medical comorbidities: Severe cardiac disease, uncontrolled diabetes, or other conditions that substantially increase surgical risk
Blood clotting disorders: Conditions or medications that affect blood coagulation (clotting) require careful evaluation
Advanced age with poor overall health: Patients with multiple comorbidities may be better suited to less invasive treatment options
Atypical facial pain: Constant or burning pain patterns, rather than classic episodic symptoms, may respond less predictably. Pain resulting from demyelinating disease (damage to the protective covering of nerves), rather than vascular compression, responds differently to decompression
Inability to undergo general anaesthesia: Patients who cannot safely receive general anaesthesia are not suitable candidates

A comprehensive evaluation by a qualified neurosurgeon includes imaging review, medical history assessment, and discussion of all available treatment options to determine the most appropriate management approach.

Treatment Techniques & Approaches

Standard Retrosigmoid Craniotomy Approach

The standard approach for microvascular decompression surgery involves a retrosigmoid craniotomy, which is a small opening created in the skull behind the ear. This approach provides direct access to the cerebellopontine angle—the region where cranial nerves emerge from the brainstem.

A limited bone opening allows clear visualisation of the affected nerve and surrounding vascular structures whilst minimising disruption to adjacent brain tissue. The bone flap removed during surgery is typically replaced at the end of the procedure using titanium plates or other fixation systems.

Endoscope-Assisted MVD

In selected cases, neurosurgeons may incorporate endoscopic assistance alongside the operating microscope. The endoscope (a thin instrument with a camera and light source) provides enhanced visualisation of anatomical areas that may be difficult to view with the microscope alone, such as the nerve root entry zone or blood vessels obscured by neural structures.

This combined approach can support improved identification of compressing vessels. The endoscope is used as an adjunct to microsurgical techniques rather than a replacement for the operating microscope.

Microsurgical Techniques and Instrumentation

MVD surgery is performed using an operating microscope, which provides magnified and illuminated views of delicate neural and vascular structures. Specialised microsurgical instruments enable precise manipulation of nerves and blood vessels.

Intraoperative neuromonitoring is routinely employed during MVD procedures. This includes brainstem auditory evoked potentials (BAEPs) to monitor hearing function by assessing the brain’s response to sound. In cases of hemifacial spasm, lateral spread response monitoring is used to assess the adequacy of decompression.

Decompression Materials

To maintain separation between the compressing blood vessel and the affected nerve, surgeons may use one or more of the following materials:

Teflon felt: A commonly used material, carefully shaped and positioned to cushion the nerve
Shredded Teflon: Allows customised placement to accommodate individual anatomical variations
Other synthetic materials: Biocompatible materials may be used based on surgical preference and clinical considerations

Considering microvascular decompression surgery?

Consultation with Dr Teo Kejia allows for evaluation of the condition and discussion of suitable treatment options based on individual clinical findings.

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The Treatment Process

Pre-Treatment Preparation

Preparation for MVD surgery begins well before the day of the procedure and involves a structured evaluation process.

Initial Consultation and Workup:

Comprehensive neurological examination (a detailed assessment of cranial nerve and brain function)
High-resolution MRI with specialised sequences, such as Constructive Interference in Steady State (CISS) or Fast Imaging Employing Steady-state Acquisition-Cycle (FIESTA) to assess neurovascular relationships (the anatomical relationship between blood vessels and cranial nerves)
Review of medication history and response to previous treatments
Blood tests and cardiac evaluation were indicated (to assess overall health and heart function)
Assessment of anaesthetic suitability and surgical risk

Pre-Operative Instructions:

Certain medications may need to be adjusted or temporarily discontinued, particularly anticoagulants or antiplatelet agents (blood-thinning medications)
Fasting is typically required from midnight prior to surgery
Arrangements for post-operative support and transport should be made in advance
Hair around the surgical site is usually trimmed on the morning of surgery

Day of Surgery:

Admission occurs on the morning of surgery or the night before, depending on hospital protocol
Final pre-operative checks are performed by the anaesthesia and surgical teams
IV access is established, and monitoring devices are applied as required

During the Procedure

MVD surgery generally takes several hours, depending on anatomical complexity and the condition being treated.

Anaesthesia and Positioning:

The procedure is performed under general anaesthesia. After induction, the patient is positioned either on the side or in a semi-sitting position, with the head secured using a rigid fixation device. Electrodes are applied for continuous intraoperative neurophysiological monitoring (the surveillance of nerve and brain function) throughout the procedure.

Surgical Steps:

Incision: A curved incision is made behind the ear, typically following the hairline where feasible
Craniotomy: A small opening is created in the skull to access the cerebellopontine angle (the region where cranial nerves emerge from the brainstem)
Dural opening: The protective covering of the brain (dura mater) is carefully opened
Cerebrospinal fluid (CSF) drainage: Controlled release of CSF (the fluid surrounding the brain and spinal cord) allows the brain to relax, providing surgical access without excessive retraction
Nerve and vessel identification: Using an operating microscope, the affected cranial nerve and the compressing blood vessel are identified
Decompression: The compressing vessel is gently mobilised away from the nerve
Cushion placement: A small insulating material, commonly Teflon felt, is placed between the nerve and vessel to maintain separation
Closure: The dura, bone, muscle, and skin are closed in layers

Intraoperative Monitoring:

Brainstem auditory evoked potentials are used to monitor hearing, and in hemifacial spasm cases, resolution of abnormal muscle responses during monitoring can indicate adequate decompression.

Immediate Post-Treatment

Following surgery, patients are transferred to the recovery area and typically monitored in a high-dependency or intensive care setting.

First 24 Hours:

Regular neurological observations
Pain management using appropriate medications
Monitoring for early post-operative complications
Head elevation to reduce swelling
Gradual resumption of oral intake as tolerated

Hospital Stay:

Most patients remain hospitalised for several days following MVD surgery. During this period, the medical team monitors recovery progress, manages symptoms, and ensures clinical stability before discharge.

Discharge Planning:

Before discharge, patients receive detailed instructions regarding wound care, medication schedules, activity limitations, and symptoms that warrant prompt medical review.

Recovery & Aftercare

First 24-48 hours

The immediate post-operative period focuses on close monitoring and comfort.

Pain Management

Post-surgical headache and incision-site discomfort are common. Pain is managed with prescribed medications, typically transitioning from IV administration to oral pain relief as recovery progresses.

Activity Level

Early mobilisation is encouraged, with sitting up and assisted walking usually initiated within the first day when appropriate. Early movement helps reduce the risk of complications such as blood clots.

Monitoring Concerns:

Our healthcare staff will monitor for potential complications, including:

Severe headache or neck stiffness, which may indicate a CSF leak
Changes in hearing, vision, or facial sensation
Increasing drowsiness or confusion
Fever or signs of infection
Facial weakness

First Week

Wound Care
The surgical incision should be kept clean and dry. Detailed wound care instructions are provided prior to discharge. Sutures or staples are typically removed approximately 7 to 10 days after surgery.

Medication Adjustments

Medications prescribed for trigeminal neuralgia or related conditions are often continued initially at the same dosage. Gradual tapering (dose reduction) is usually guided over weeks to months based on symptom response and clinical assessment.

Activity Guidelines:

Avoid strenuous activity, heavy lifting, and bending
Light walking is encouraged
Driving should only resume once cleared by the surgeon
Adequate rest supports the healing process

Follow-up Appointment

A post-operative review is typically scheduled within one to two weeks after surgery to assess wound healing and early recovery progress.

Long-Term Recovery

Timeline for Return to Activities

The timeline for return to normal activities and symptom relief varies depending on individual recovery, overall health, and the underlying condition being treated.

Several weeks: Resumption of light daily activities and desk-based work
Around a month or more: Gradual return to more routine activities
A few months: Recovery for most patients
Several months: Ongoing healing and outcome evaluation

Some patients experience symptom relief immediately following surgery, while others notice gradual improvement over days to weeks. Temporary facial numbness or altered sensation may occur initially and typically improves with time.

Long-term Follow-up

Regular follow-up appointments allow for monitoring of symptom control and medication adjustment when required. Reviews are commonly scheduled over the first year after surgery and subsequently as clinically indicated.

Wondering What Comes Next After Surgery?

Consult Dr Teo Kejia to discuss your expected recovery, post-operative care, and individual considerations following microvascular decompression surgery.

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Benefits of MVD Surgery

MVD surgery offers several potential advantages for suitable candidates:

Addresses the underlying cause

Unlike medications or ablative procedures (a procedure that destroys or removes diseased tissue), MVD targets the source of nerve compression rather than just relieving symptoms
Pain relief

It can reduce pain in conditions such as trigeminal neuralgia
Preserves nerve function

Normal facial sensation and function are maintained, unlike some destructive procedures
No facial numbness

Pain relief may be achieved without causing numbness
Reduced medication dependence

Some patients may be allowed to reduce or stop pain medications after surgery
Effective for multiple conditions

MVD may manage trigeminal neuralgia, hemifacial spasm, and glossopharyngeal neuralgia

Outcomes vary depending on individual health factors. MVD may be considered as part of a management plan aimed at controlling symptoms while maintaining facial function.

Common Side Effects

As with any surgical procedure, MVD surgery carries certain risks. Understanding these helps patients make informed decisions.

Temporary Effects

Headache: Usually improves over days to weeks
Nausea: Related to anaesthesia, typically resolves quickly
Fatigue: Normal after surgery, gradually improves
Incision discomfort: Managed with pain medications
Temporary facial numbness: Often mild and improves over months
Temporary balance disturbance: Usually resolves as the body adjusts

These effects are generally manageable with standard post-operative care.

Rare Complications

Hearing Loss: Surgery is near the hearing structures. Monitoring during surgery helps minimise risk, but it cannot be eliminated entirely.
Facial Weakness: Temporary weakness may occur, particularly in hemifacial spasm surgery. Permanent weakness is rare.
CSF Leak: This leakage can occur through the wound or the nose. Most cases resolve without surgery, though some may require further intervention.
Meningitis: Infection of the membranes covering the brain is rare and treated with antibiotics.
Stroke: Extremely rare; manipulation of blood vessels carries a small risk.
Recurrence: Symptoms may return, requiring additional treatment.

Careful patient selection, meticulous surgical technique, and intraoperative monitoring help reduce the risk of complications. Choosing a qualified neurosurgeon experienced in this procedure further supports safer outcomes.

Cost Considerations

The cost of MVD surgery in Singapore varies depending on several factors:

Hospital choice: Different hospitals have varying facility fees
Length of hospital stay: Typically a few days; complications may extend the duration
Surgeon’s fees: Based on the complexity and duration of the procedure
Anaesthesia fees: For the anaesthesiologist’s services during surgery
Intraoperative monitoring: Neurophysiological monitoring adds to the overall cost
Diagnostic imaging: Pre-operative MRI scans of the brain and blood vessels
Post-operative care: Follow-up appointments and any additional treatments

Treatment usually includes surgery, hospital stay, medications during admission, and routine follow-up. Extra costs may arise for extended monitoring, managing complications, or revision surgery. Outcomes differ among patients based on individual health factors.

Discuss costs during your consultation — our healthcare provider can provide a personalised estimate tailored to your treatment plan.

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Frequently Asked Questions

How long does pain relief last after microvascular decompression surgery?

The durability of pain relief varies among patients. Some individuals experience long-term relief, while others may have partial or recurrent symptoms over time. Factors influencing durability include the underlying cause of nerve compression, intraoperative findings, and whether the compressing blood vessel is clearly identified and adequately separated from the nerve. If symptoms recur, they may be milder than before surgery, and additional management options remain available.

Will I have facial numbness after the surgery?

One of the characteristics of MVD surgery compared to ablative procedures is that it aims to preserve normal facial sensation. Most patients do not experience significant permanent numbness. Some temporary numbness or altered sensation is common in the early post-operative period and typically improves over weeks to months. However, existing numbness from previous procedures may persist.

When can I return to work after microvascular decompression surgery?

The timing of return to work depends on the nature of employment and individual recovery. Patients with desk-based roles may return within several weeks if recovery is uncomplicated. Physically demanding occupations typically require a longer recovery period. Driving should be avoided until sedating pain medications are discontinued and clearance is given by the surgeon, usually several weeks after surgery. Personalised guidance is provided based on recovery progress.

Is microvascular decompression surgery safe for elderly patients?

Chronological age alone does not determine suitability for microvascular decompression surgery. Overall health status and medical comorbidities are more important considerations. Elderly patients in good general health may be candidates, although outcomes vary depending on individual factors. For patients with significant medical concerns, alternative treatments such as stereotactic radiosurgery (a non-invasive radiation-based treatment) may be considered. A comprehensive evaluation helps determine the most appropriate approach.

What happens if the surgery doesn’t work?

Not all patients achieve pain relief following surgery. In such cases, adequate time is first allowed for delayed improvement, as symptom relief may occur gradually. Medications may be adjusted or restarted, and repeat imaging may be performed to assess for residual compression. Additional treatment options, including repeat microvascular decompression or alternative procedures such as stereotactic radiosurgery or percutaneous techniques (minimally invasive procedures performed through the skin), may be considered based on individual circumstances.

How is microvascular decompression surgery different from other treatments for trigeminal neuralgia?

MVD differs from other surgical treatments in that it aims to relieve nerve compression without intentionally damaging the nerve. Percutaneous procedures (such as balloon compression, glycerol injection, or radiofrequency ablation) and stereotactic radiosurgery intentionally create controlled nerve injury to interrupt pain signals, which often results in some degree of facial numbness. These alternatives are less invasive and may be suitable for patients who are not candidates for MVD. In contrast, MVD requires general anaesthesia and a craniotomy but seeks to preserve normal nerve function.

What pain levels can I expect immediately after surgery?

Post-operative headache and incision-site discomfort are common and typically manageable with prescribed medications. Regarding facial pain, some patients experience improvement upon waking from surgery, while others notice gradual relief over days to weeks. Prescribed medications are usually continued initially and tapered gradually under medical supervision, as abrupt discontinuation may trigger symptom recurrence.

Conclusion

Surgery is a treatment option for patients with trigeminal neuralgia (severe facial pain caused by nerve irritation), hemifacial spasm (involuntary facial muscle contractions), and other cranial nerve conditions related to blood vessel compression. By addressing the underlying source of nerve irritation, the procedure aims to relieve symptoms while preserving normal facial sensation and nerve function.

For patients in Singapore who do not achieve adequate relief with medication or experience significant medication-related side effects, MVD surgery may be considered as a surgical approach. While all surgical procedures carry inherent risks, careful patient selection and experienced surgical technique play an important role in supporting favourable outcomes.

If persistent facial pain or involuntary facial movements are affecting your quality of life, consultation with our qualified neurosurgeon can help determine whether MVD surgery may be appropriate for your individual condition.

Ready to Take the Next Step?

If you’re considering microvascular decompression surgery, consult our neurosurgeon to discuss your symptoms, treatment options, and whether microvascular decompression surgery may be suitable for you.

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Dr Teo Kejia (张哿佳医生)

Senior Consultant Neurosurgeon

MBBS (SG)●MRCS (Edin)●FAMS●FRCS Ed●IFAANS

Dr Teo Kejia is a Senior Consultant Neurosurgeon and Medical Director at Precision Neurosurgery, with more than 15 years of clinical experience.

Dr Teo has extensive knowledge and experience in the field of neurosurgery, with a particular focus on complex brain tumour procedures. He is adept in employing advanced surgical techniques, including brain mapping and awake brain surgery, especially for treating gliomas and glioblastomas. His expertise extends to neuro-oncology, encompassing both brain and spinal tumours, as well as neurovascular and skull base surgery.

Additionally, Dr Teo offers treatment for a range of neurological conditions, such as traumatic head injuries, intracerebral aneurysms, and degenerative spine disorders, which include neck and back pain. He is also proficient in managing ischemic and haemorrhagic strokes, hydrocephalus, trigeminal neuralgia, and hemifacial spasm.

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