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ENTMainPageImageComputer Assisted Surgery for ENT: Enhanced Sinus Vision

Clear visualization of the surgical site is a vital aspect of any procedure.  And this includes ear, nose and throat (ENT) operations. CAS helps ENT surgeons navigate their surgical instruments through complex sinus passages and help avoid unintentional damage to delicate anatomy such as the brain, eyes, nerves and vessels.[1] The ability to work precisely in this delicate environment helps reduce the risk of complications and may lead to improved patient outcomes.
During computer assisted sinus surgery, specialized software creates a virtual 3-D model of the patient’s head and sinuses, essentially a digital roadmap for the surgeon to follow. During surgery the surgeon matches the patient’s actual anatomy to the 3-D model displayed on a monitor. Much like a GPS system in an automobile, the surgeon is then able to track in real time the position of surgical instruments in relation to the patient’s true anatomy.
Stryker’s CAS technology consists of 1.) and infrared navigation camera, 2.) Smart Instruments with light-emitting diode (LED) technology and 3.) a computer with specialized surgical navigation software.
Prior to sinus surgery with Stryker’s CAS technology, the patient undergoes a CT scan that reveals the soft tissue and bony structures in and around the sinuses. These images are then imported in to the navigation computer, and the software uses these images to create the virtual 3-D model of the patient’s sinus anatomy. In the operating room, the surgical staff places a sticker-like mask (embedded with LEDs) on the patient’s face.  This mask, in conjunction with the navigation camera, is used to match the patient’s true anatomy with the virtual 3-D model.  Once this process of patient registration is complete, the navigation camera tracks the movement of Smart Instruments and continuously feeds the location of the coordinates to the computer, displaying the exact location of the instruments on the 3-D model.
Surgeons may also take advantage of the many features navigation software provides in pre-operative planning, including: segmenting out the surgical target from surrounding healthy tissue for enhanced precision as well as the ability to combine multiple image sets (such as CT and MRI) for enhanced visualization of the anatomy.
This technology enables minimally invasive procedures by offering the surgeon enhanced visualization of the sinus cavities, especially when combined with the use of an endoscope (a thin fiber-optic tube connected to a video camera). With such comprehensive data about the patient’s anatomy, CAS also helps guide surgeons through difficult cases, such as a revision surgery where the patient’s sinus anatomy has been changed by a previous operation.

Common Conditions & Treatment

According to the American Academy of Otolaryngology – Head and Neck Surgery, Computer assisted surgery (CAS) can aid surgical teams in the following procedures[2]:

  • Revision sinus surgery
  • Distorted sinus anatomy
  • Extensive sino-nasal polyposis

Read More.

Image Gallery

(ENT) Autoregistration maskDuring neurosurgical and ENT procedures, a mask with LED technology is placed on the patients face used to match the patient’s anatomy with the virtual 3D model generated by the computer assisted surgery software.

(ENT) ENT OR SetupDuring functional endoscopic sinus surgery (FESS), surgeons may utilize surgical navigation to enhance their visualization and track in real time the position of Smart Instruments in the patient’s sinuses.

ENT screenshotDuring computer assisted sinus surgery, Smart Instruments are tracked and displayed on the computer monitor. The surgeon is able to see the exact location of the instrument in relation to the anatomy as the instrument moves through the sinuses.

Trans Nasal NavigationComputer assisted surgery (CAS) technology enables minimally invasive sinus surgery by offering the surgeon enhanced visualization of the sinus cavities, especially when combined with the use of an endoscope. The CAS software provides the surgeon an enhanced visualization of the patient’s anatomy by showing the position of an instrument in relation to the patient’s imported CT scan and a live view of the sinuses from the endoscope.


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