What Is Minimally Invasive CP Surgery and Why Does It Matter?
If you have been researching cerebral palsy surgery, you have likely come across the phrase “minimally invasive.” But what does it actually mean — and why does it change so much about the experience of surgery, recovery, and outcome for children and adults with CP? This guide gives you a plain-language answer.
What minimally invasive actually means
In surgery, “minimally invasive” describes any technique that achieves its therapeutic goal through the smallest possible disruption to the body. Instead of opening a large area of tissue to access the treatment target, a minimally invasive surgeon uses tiny entry points — and precision instruments designed to work through them.
The term covers a wide range of approaches across all fields of medicine. In cerebral palsy surgery specifically, it describes procedures that treat spastic muscles and connective tissue through very small incisions in the skin — rather than through the large open cuts used in traditional orthopaedic or spinal surgery.
The most straightforward way to understand it is through contrast. Imagine the difference between fixing a leaking pipe by digging up the whole garden versus threading a camera and tool down through a small access point. Both fix the pipe. But the second approach causes far less disruption, heals far faster, and carries far fewer risks to everything around the pipe.
In the context of SFDM at the CP Clinic: minimally invasive means up to 40 separate microincisions of just 2 to 3 mm each — none of which require stitches, none of which leave visible scars, and all of which can be made across the entire body in a single surgical session of about one hour. The patient goes home the same day.
Traditional CP surgery vs minimally invasive — side by side
To understand why the minimally invasive approach represents such a meaningful shift, it helps to see traditional and minimally invasive CP surgery compared directly across the factors that matter most to families.
| Factor | Traditional Open Surgery (e.g. tendon lengthening, SDR) |
Minimally Invasive Surgery (e.g. SFDM at CP Clinic) |
|---|---|---|
| Incision size | 3–10 cm open cuts; spinal surgery requires longer incision + laminectomy | Up to 40 microincisions of 2–3 mm each |
| Stitches needed | Yes — wound closure required | No — microincisions self-close |
| Visible scarring | Yes — permanent scars at incision sites | No visible scarring |
| Hospital stay | 3–7 days post-operative inpatient | Same-day discharge (within 12 hours) |
| Post-op casts / splints | Often required for weeks | Not required |
| When rehab begins | Weeks after surgery | Days 2–3 (upper limbs); day 7–8 (lower limbs) |
| Body segments treated | One region per procedure; staged surgery for multiple areas | Full body — upper + lower limbs in one session |
| Risk of nerve / spinal damage | Present (especially SDR) | Minimal — no approach to nerves or spinal cord |
| Pain level post-op | Significant — requires inpatient pain management | Mild — managed with standard pain relief |
| Age range | SDR: 3–8 years optimal; open surgery varies | From 24 months, no upper age limit |
| International families | Extended stay required; intensive local rehab infrastructure needed | 4–5 day total clinic stay; home-based rehab program |
How SFDM achieves minimally invasive treatment
SFDM (Selective Fibrotomy of Damaged Muscles) is the specific minimally invasive technique developed by Professor Vigein Tovmasian at the CP Clinic. Understanding what it does — and what makes it genuinely different from simply making smaller cuts in a traditional procedure — helps clarify why it produces meaningful results through such a small approach.
The key is in what is being targeted. In chronically spastic muscles, fibrotic tissue — damaged, scarred fibres — builds up over time. This fibrotic tissue does not contract and lengthen like healthy muscle: it is inelastic and rigid, and it is the primary structural reason why spastic muscles cannot lengthen fully and move normally. Traditional open surgery lengthens the tendon at the end of the muscle — an effective structural change, but one that does not address the fibrotic tissue within the muscle belly itself.
SFDM targets the fibrotic tissue directly, precisely, through microincisions placed into the muscle belly at the exact points where fibrotic tissue is concentrated. The surgeon identifies these points by feel — they require the trained hands and specific knowledge that Professor Tovmasian has developed over years of practice. Each microincision selectively releases fibrotic tissue while leaving healthy muscle fibres intact. The result is a muscle that can lengthen and function far more normally — without tendon cutting, without joint entry, and without any approach to the spinal cord.
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Assessment and mapping Before surgery, the specific muscle groups to be treated are assessed and mapped. Professor Tovmasian reviews videos of the patient’s movement and conducts a physical examination to identify where fibrotic tissue is most concentrated and which muscles are most limiting function.
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General anaesthesia The procedure is performed under general anaesthesia. The entire process, including anaesthetic induction and recovery, is typically completed within a few hours, and same-day discharge follows.
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Precise microincision placement Working through up to 40 entry points of 2 to 3 mm, Professor Tovmasian uses specialised instruments to locate and selectively release fibrotic tissue within the spastic muscle bellies — upper limbs, lower limbs, and trunk as needed, all in a single session.
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Immediate closure and recovery Because the incisions are 2 to 3 mm, no sutures are required. The sites are dressed and the patient moves to recovery. By evening, most patients are comfortable, alert, and ready to go home.
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Rehabilitation begins Before leaving the clinic, the patient receives a personalised written and video rehabilitation program. Upper limb exercises can begin on days 2–3; lower limb exercises from days 7–8. The neuroplastic window is open and rehabilitation can begin capturing its benefit almost immediately.
Why it matters — 7 concrete differences
The phrase “minimally invasive” can sound like marketing language. These are the concrete, real-world differences it makes for families who choose this approach over traditional surgery.
Home the same day
No days or weeks in hospital. Your child sleeps in their own bed the night of surgery.
Rehab starts in days
Not weeks. The neuroplastic window opens immediately and therapy can capture it.
Practical for international families
4–5 days total at the clinic. No need for months abroad or local specialist infrastructure.
No visible scars
Microincisions heal without stitches. No permanent marks on a child’s skin.
Lower risk profile
No spinal approach, no nerve roots, no joint entry. Minimal risk of serious complication.
Whole body in one session
Arms, hands, legs, and trunk treated simultaneously. No staged procedures.
No upper age limit
From 24 months to nearly 60 years. Applicable across the full lifespan with CP.
The neuroplasticity advantage
There is one benefit of early, minimally invasive surgery that goes beyond logistics and comfort — and that is its relationship with the brain’s neuroplasticity. The sooner after surgery that intensive rehabilitation begins, the more of the brain’s neuroplastic capacity is available to be directed into building better movement patterns.
When surgery requires weeks of casting or bed rest before rehabilitation can start, that is weeks of the neuroplastic window that cannot be used. When surgery allows rehabilitation to begin within days — as SFDM does — virtually the entire post-surgical period becomes available for the brain to rewire itself around the improved muscular function. This is not a minor difference. In young children especially, it is one of the most important reasons that minimally invasive surgery produces better long-term outcomes than its more invasive alternatives.
From a parent’s perspective: minimally invasive surgery means your child comes home the evening of their procedure, starts gentle exercises within a few days, and returns to their familiar environment — their toys, siblings, and routines — almost immediately. The psychological impact of hospitalisation on young children is real, and eliminating it is not a trivial benefit.
Who qualifies for minimally invasive CP surgery
SFDM is suitable for a wide range of patients — broader than most surgical approaches for CP. A telemedicine evaluation with Professor Tovmasian is needed to confirm suitability for each individual. Generally, good candidates are those who:
- Have a confirmed diagnosis of cerebral palsy with spasticity (consistently elevated muscle tone) as the primary movement problem
- Are aged 24 months or older — there is no upper age limit
- Have functional limitations, pain, or restricted movement that is directly caused by that spasticity
- Are medically fit for general anaesthesia
- Have realistic expectations about the goals of surgery — meaningful improvement, not necessarily complete normalisation
- Are willing and able to commit to the post-operative rehabilitation program
SFDM is applicable to all patterns of spastic cerebral palsy — spastic diplegia, hemiplegia, and quadriplegia — and to both children and adults. It is not limited to the lower limbs (unlike SDR) and does not have the strict age window that makes SDR unsuitable for most older children and adults.
Patients who are not suitable for SFDM alone are those whose primary restriction comes from fixed bony deformities or severely fixed contractures rather than active spasticity. In these cases, additional orthopaedic procedures may be needed alongside or before SFDM — and the evaluation will identify this.
Ready to find out if minimally invasive surgery is right for your child — or for you?
Request a free remote evaluation →Frequently asked questions
What does minimally invasive mean in cerebral palsy surgery?
It means the surgeon accesses and treats the target tissue through very small incisions — in SFDM, up to 40 microincisions of just 2 to 3 mm each — rather than through large open cuts. This reduces surgical trauma dramatically, eliminates the need for stitches or visible scarring, allows same-day discharge, and enables rehabilitation to begin within days of the procedure.
What is the difference between minimally invasive CP surgery and traditional open surgery?
Traditional open surgery requires incisions of several centimetres, post-operative casts, a hospital stay of 3 to 7 days, and weeks before rehabilitation can begin. Minimally invasive SFDM uses microincisions of 2 to 3 mm with no stitches, same-day discharge, and rehabilitation beginning within days. The functional outcomes are comparable or superior, with a fraction of the recovery burden.
Is minimally invasive CP surgery as effective as open surgery?
For what SFDM addresses — fibrotic tissue within spastic muscles — minimally invasive surgery is not a compromise version of open surgery but a distinct, purpose-designed approach that targets tissue more precisely. The reported success rate of SFDM is 98%, and the ability to treat all affected body segments in a single session is something open surgery cannot match.
Does minimally invasive CP surgery leave scars?
No visible scarring. The microincisions in SFDM are 2 to 3 mm and heal without stitches. Within a few weeks the sites are typically invisible to the naked eye — in contrast to open tendon surgery which leaves permanent scars, and SDR which leaves a significant spinal scar.
How soon can a child go home after minimally invasive CP surgery?
Most patients are discharged within 12 hours of the procedure ending — the same day as surgery. International families typically spend 4 to 5 days at the clinic in total, including pre-operative assessment, the procedure, initial recovery, and the design of the personalised rehabilitation program.
What is the youngest age for minimally invasive CP surgery?
SFDM can be performed from 24 months (2 years) of age. Below this age, spasticity has not yet fully established itself. There is no upper age limit — the procedure has been successfully performed in patients approaching 60 years of age.
What risks does minimally invasive CP surgery carry?
SFDM carries a significantly lower risk profile than open or spinal procedures. Because the microincisions do not cut tendons, enter joints, or approach the spinal cord, the risks of nerve damage, joint instability, and spinal complications are avoided. The main risks are those of general anaesthesia, and the minor risks of infection or bruising at the microincision sites — both uncommon and manageable.
Can minimally invasive surgery treat both arms and legs in one session?
Yes — this is one of SFDM’s most significant advantages. In a single session, Professor Tovmasian can address all affected muscle groups across the entire body — hands, wrists, elbows, shoulders, hips, thighs, calves, and feet simultaneously. Open surgery and SDR cannot offer this comprehensive whole-body treatment in a single procedure.
References
- Novak I, et al. (2020). “State of the Evidence Traffic Lights 2019: Systematic Review of Interventions for Preventing and Treating Children with Cerebral Palsy.” Current Neurology and Neuroscience Reports. PubMed ↗
- Grunt S, et al. (2011). “Indications and outcome of selective dorsal rhizotomy in children with spastic cerebral palsy.” Developmental Medicine & Child Neurology. PubMed ↗
- Nuzzo R. (2020). “Selective Percutaneous Myofascial Lengthening.” PMC, National Library of Medicine. PMC ↗
- Graham HK, et al. (2016). “Cerebral palsy.” Nature Reviews Disease Primers. PubMed ↗
- Morgan C, et al. (2016). “Early intervention for children aged 0–2 years with or at high risk of cerebral palsy.” Developmental Medicine & Child Neurology. PubMed ↗