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Planning technology

Intraoperative Navigation

Intraoperative navigation tracks surgical instruments and displays their position on the patient’s scan while the operation is under way. It works rather like a map reference, confirming where a tip lies in relation to structures that cannot be seen directly.

Intraoperative Navigation
Anaesthesia
General anaesthetic for the operation it is used within
Hospital stay
Determined by the procedure being performed
Back to routine
Set by the reconstruction rather than by navigation
Cost band
See treatment pages
Quick answer

Intraoperative navigation links the patient’s scan to their actual position on the operating table. Reference markers are attached, the system is registered against known landmarks, and a tracked instrument then shows on screen where its tip sits within the anatomy. The surgeon uses it to confirm position near structures that are hidden, while still relying on what the tissues themselves show.

Key takeaways
  • Intraoperative navigation displays the position of a tracked instrument on the patient’s scan during surgery.
  • The system must be registered against the patient at the start, and accuracy depends on how well that registration is done.
  • Navigation is most useful deep in the orbit, the skull base and areas distorted by previous surgery.
  • It confirms position but does not show soft tissue that has moved since the scan was taken.
  • The surgeon interprets the display alongside direct inspection rather than following it blindly.
Intraoperative navigation: Intraoperative navigation is a system that tracks surgical instruments and shows their position on the patient’s scan while the operation is taking place.

What intraoperative navigation involves

Some parts of the face and skull are difficult to see into. The back of the orbit, the skull base and areas scarred by earlier surgery all hide important structures behind bone and tissue. Navigation offers a way of checking position in these places without opening more than the operation requires.

Setting it up takes a little time at the start. The patient’s scan is loaded, a reference frame is fixed to the head, and the system is registered by touching known landmarks or by matching the surface of the face. Accuracy is then verified on recognisable points before any use is made of it. Once registered, a tracked pointer or instrument appears on the screen as a marker moving through the scan images as the surgeon moves it in the wound.

Its honest limitation is that the scan is a photograph of a moment. Bone stays where it was, but soft tissue shifts once retractors are placed and tissue is removed, so the display becomes less reliable for soft structures as the operation goes on. Navigation confirms and reassures. It does not see, and the surgeon continues to work from direct inspection and anatomical knowledge.

When this technique is used
✦Orbital reconstruction where the back of the orbit must be reached safely
✦Skull base procedures close to nerves, vessels and the brain
✦Repair of complex facial fractures where landmarks have been displaced
✦Revision surgery in areas distorted by previous operations or scarring
✦Removing foreign bodies or fragments that are hard to locate directly
✦Checking that a bone segment or implant sits where it was planned to sit

Situations that call for extra caution

The registration check does not agree with recognisable anatomical landmarks.
The reference frame is knocked or moves during the operation.
The scan being used was taken before a change in the anatomy.
The display and what the surgeon can see directly disagree with each other.

When this technique is and is not the right choice

Navigation earns its place where anatomy is hidden or distorted and where an error of a few millimetres would matter. Elsewhere it adds setup time without changing the operation.

May be suitable when
✦Surgery deep in the orbit or at the skull base, close to nerves and vessels
✦Anatomy distorted by earlier operations, tumour or long standing injury
✦Cases where a recent, good quality scan is available for registration
✦Procedures where confirming the position of an implant or segment is important
May not be suitable when
✦Straightforward surgery in areas the surgeon can see and feel directly.
✦Emergency procedures where setup time would delay urgent treatment.
✦Cases where the available imaging is old or degraded by artefact.
✦Operations dominated by soft tissue movement, where the scan quickly becomes outdated.

How navigation is set up and used

01
Loading the imaging

A recent CT scan, and sometimes an MRI, is loaded into the system before surgery. The quality and the age of this imaging set the ceiling on how useful navigation will be.

02
Attaching the reference frame

A reference marker is fixed to the head so the system knows the patient’s position. If this frame moves during the procedure, registration has to be repeated.

03
Registration

Known landmarks are touched with a pointer, or the surface of the face is matched to the scan. The system then aligns the images with the patient on the table.

04
Verifying accuracy

The surgeon touches recognisable points and compares them with the display. Navigation is only trusted once this check agrees with the anatomy in front of them.

05
Using it during surgery

A tracked instrument shows its tip position on the screen when the surgeon chooses to check. The display is read alongside direct inspection, not instead of it.

How navigation fits the treatment timeline

Before surgery

Imaging is arranged in the format the navigation system requires. No preparation beyond the scan itself is needed from the patient.

On the day

Setup and registration add a period at the start of the operation. Recovery afterwards is that of the procedure performed, not of the navigation.

Week 1 to 6

Wound care, activity limits and review appointments follow the reconstruction. Navigation plays no part in this stage.

Month 6 and beyond

A follow up scan is sometimes compared with the plan to confirm that implants or bone segments sit as intended.

What this technique can achieve

✦Confirms instrument position in areas that cannot be seen directly
✦Helps the surgeon work confidently near nerves, vessels and the skull base
✦Assists in locating small fragments or foreign bodies that are hard to find
✦Allows the position of an implant or bone segment to be checked during surgery
✦Can reduce the amount of exposure needed to identify landmarks

What results are realistic

Navigation adds confidence in difficult anatomy and can make a demanding step more straightforward. It does not by itself change how well a reconstruction heals or how it eventually looks. Accuracy depends on registration and on the reference frame staying still, and it drifts for soft tissue as the operation progresses. Used sensibly, it is a helpful cross check. Treated as an authority in its own right, it can mislead.

Risks and limitations

Navigation carries little direct risk to the patient, but its limitations matter and are worth understanding.

Registration error can make the display inaccurate without this being obvious.
Movement of the reference frame during surgery invalidates the alignment.
The scan does not update, so soft tissue positions become outdated as surgery proceeds.
Setup adds time at the start of the operation and therefore to the anaesthetic.
Over reliance on the screen can distract from direct observation of the tissues.

Caring for the donor and recipient sites

Navigation leaves nothing behind, so aftercare is entirely that of the operation it supported, including any site tissue or bone was taken from.

✦Follow the wound care instructions given for the operated area and any donor site.
✦Keep the head elevated as advised while facial swelling settles.
✦Attend the imaging appointments arranged to confirm implant or segment position.
✦Avoid tobacco, which slows healing at every surgical site.
✦Report any change in vision, sensation or wound appearance without waiting for the next review.

Common myths about surgical navigation

MythNavigation means a robot is doing the surgery.
In practice

The system only tracks and displays position. Nothing moves an instrument except the surgeon, who decides when the display is worth consulting.

MythThe screen is always right.
In practice

Accuracy depends on registration and on the reference frame staying still. When the display and direct inspection disagree, the anatomy in front of the surgeon takes precedence.

MythIt makes complex surgery straightforward.
In practice

It helps in specific, difficult moments. The judgement, the exposure and the reconstruction itself remain as demanding as they ever were.

MythEvery facial operation should use navigation.
In practice

In areas the surgeon can see and feel directly it adds setup time without benefit. It is chosen for hidden or distorted anatomy.

Why patients choose Elegance Clinic

Elegance Clinic in Surat uses navigation for the situations where hidden anatomy makes it genuinely valuable. Dr. Ashutosh Shah explains what it will and will not contribute to the operation before treatment is agreed.

✦Navigation used selectively, for anatomy that cannot be assessed directly
✦Its limits explained honestly rather than presented as a assurance of accuracy
✦Imaging arranged in advance in the format the system requires
✦A written estimate covering the whole operation shared before admission
Cost & insurance

Cost and insurance

Technique pages do not carry their own price, because the cost depends on the treatment the technique is used within. Where navigation is used, its cost is included in the estimate for the operation it supports rather than charged separately. Please see the relevant treatment page for its band, and ask for a written estimate at consultation.

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Patients ask

Questions patients ask, answered

These are the questions that come up most often in consultation. If yours is not here, send it on WhatsApp and the team will reply, usually the same day.

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Where it is used, its cost sits inside the estimate for the operation rather than as a separate line. Ask at consultation whether navigation is planned for your procedure and what difference it makes to the overall figure.

It adds no incision and involves no extra exposure during the operation. The main considerations are the setup time it adds to the anaesthetic and the imaging needed beforehand, which carries some radiation exposure.

Registration and verification take a period at the start. In difficult anatomy this can be offset by time saved later. Your surgical team will weigh the trade before deciding to use it.

Yes. Accuracy depends on how carefully the system is registered and on the reference frame staying still. Verification checks are done throughout, and where the display and the anatomy disagree, direct inspection is trusted.

Not directly. It helps the surgeon work safely and confirm positions in hidden areas. Appearance depends on the reconstruction itself, on soft tissue and on healing over the following months.

No. In areas the surgeon can see and feel, it adds setup time without benefit. It is reserved for deep orbital work, skull base surgery and anatomy distorted by previous operations or injury.

Usually a recent fine cut CT scan in a format the system can use, and sometimes an MRI as well. Bring any existing scans on disc, since suitable recent imaging may avoid repeating them.

Related

Related pages

Seeing patients from across the city and beyond: read about the practice on the plastic surgeon in Surat page, or check what a written estimate covers on the costs and insurance page.

Bring the reports you have. We will tell you honestly what is needed, and when.

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