Minimally Invasive Spine Surgery

What is Minimally Invasive Spine Surgery?

Minimally invasive spine surgery (MIS) encompasses a range of surgical techniques that achieve the same goals as traditional open spine surgery — nerve decompression, disc removal, spinal fusion — through smaller incisions, with less disruption to the muscles and soft tissues surrounding the spine. Rather than stripping and retracting the paraspinal muscles across a wide open field, MIS techniques use tubular retractors, sequential dilators, or endoscopes to create a narrow working corridor directly to the surgical target.

At One Brain and Spine, minimally invasive technique is our default approach for all eligible spinal procedures. Our Melbourne neurosurgeons are trained and experienced in the full spectrum of MIS spine surgery — from endoscopic discectomy to minimally invasive spinal fusion.

Benefits of Minimally Invasive Spine Surgery

• Smaller incisions — typically 1 to 4cm versus 8 to 15cm for open surgery
• Less muscle disruption — tubular or endoscopic systems dilate rather than strip muscles
• Reduced blood loss — less operative bleeding and lower transfusion rates
• Lower infection risk — smaller wound surface
• Less postoperative back pain — primary source of postoperative pain is muscle trauma, which is minimised
• Shorter hospital stay — often 1 to 3 days versus 3 to 7 for open procedures
• Faster return to work and daily activities
• Better preservation of spinal stability — reduced risk of iatrogenic instability
• Comparable or superior long-term clinical outcomes to open surgery for appropriate procedures

MIS Procedures Offered at One Brain and Spine

One Brain and Spine's neurosurgeons offer minimally invasive approaches for:

• Lumbar microdiscectomy — microscopic and endoscopic techniques
• Lumbar laminotomy and decompression — unilateral keyhole decompression and endoscopic decompression for stenosis
• MIS TLIF — transforaminal interbody fusion via two small posterior incisions.  On occasions this is performed endoscopically
• Lateral interbody fusion (XLIF/LLIF/PTP) — flank approach for upper lumbar levels
• Endoscopic cervical foraminotomy — keyhole posterior cervical nerve decompression
• Percutaneous pedicle screw fixation — screws inserted through skin punctures under navigation

How is MIS Spine Surgery Different from Open Surgery?

In traditional open spine surgery, a single long midline incision is made and the paraspinal muscles are stripped away from the bone over multiple levels to create a wide surgical exposure. This muscle stripping is a significant source of postoperative back pain and prolonged recovery.

In MIS spine surgery, a shorter incision is made and tubular dilators of increasing size are inserted sequentially — each one gently pushing the muscles aside rather than cutting through them. A tubular retractor of the final working diameter (typically 18 to 26mm) is then docked over the target level, maintaining the muscle-sparing corridor for the duration of the procedure. The neurosurgeon operates through this tube using a microscope or endoscope for illumination and magnification.  The use of the endoscope further decreases the trauma to the spinal muscles and may be an excellent option for you if surgery is required. 

For fusion procedures, percutaneous pedicle screws can be inserted through separate small skin punctures under fluoroscopic or CT navigation or robotic guidance — avoiding the need for additional muscle stripping to place hardware.

Recovery timelines depend on the specific procedure performed. In general, MIS approaches offer:

• Shorter hospital stay than equivalent open procedures
• Less postoperative back pain — reduced need for strong opioid analgesics
• Faster mobilisation — most patients walk the same day
• Earlier return to work — typically 1–2 weeks faster than open equivalents
• Lower wound complication rates

Specific recovery timelines for each procedure are detailed on the individual procedure pages. See the Microdiscectomy, Laminotomy, TLIF, ALIF, and other procedure pages for procedure-specific recovery information.

Outcomes of Minimally Invasive Spine Surgery

High-quality evidence from randomised trials and systematic reviews confirms that MIS spine surgery achieves equivalent or superior clinical outcomes to open techniques for the majority of spinal procedures, with consistent advantages in early recovery metrics, blood loss, and infection rates. Long-term outcomes are comparable. One Brain and Spine's neurosurgeons apply MIS principles to maximise patient benefit while maintaining the highest standards of surgical safety and efficacy.

Risks

Risks are similar to those of equivalent open procedures, with the addition of a small risk of conversion to open surgery if the minimally invasive approach does not provide sufficient access. Specific risks are detailed on each procedure's individual page.