Transdermal Antenna / SeeWii wireless camera replacing the laparoscope in MIS
Type: Medical Devices
Sector: General Surgery
The number of laparoscopic surgeries that are performed is on the rise. In performing laparoscopic surgeries, surgeons make smaller skin incisions and use special instruments and techniques which in some cases can reduce blood loss, expedite post operative recovery and reduce post operative pain. Therefore, when possible, patients and their surgeons prefer laparoscopic surgeries over open surgeries. The success of laparoscopic surgeries depends on sophisticated video-camera technology, precise surgical instruments and experienced surgeons. During a laparoscopic surgery, cameras act as a surgeon's eyes and instruments as their hands and fingers. Therefore, technological advances in the equipment used during laparoscopic surgeries may lead to more successful surgeries and better post operative prognosis. However, a mammalian body presents a unique environment which can limit the use of certain technologies. For example, equipments that employ wire connections for data transmission limit the surgeons' capability to operate freely within the body cavity due to restriction of movements by the cables. Also, wireless technologies that use high frequency signals may be limited, because high frequency signals are absorbed by tissues limiting or precluding transmission of data through the body. As MIS progresses the need to detach the camera from its attachments to the outside of the body arises. Placing a miniature camera inside the abdominal cavity without any cable connections will avoid performing an extra incision just for the camera, will allow better maneuverability inside the body, and will acquire better field of vision during surgery therefore enhancing the surgeons’ performance and enhance the safety of surgery. Surgeons today are envisioning a cable-free HDTV camera which can be placed anywhere within the abdominal cavity during surgery. Designing a low cost miniature wireless camera, which can transmit high bandwidth signal associated with high definition video through body tissues, is extremely challenging due to the high loss associated with wireless transmission through body tissues.
Our invention takes advantage of the low loss propagation within the inflated cavity created for the minimally invasive surgery. A wireless camera or multiple cameras are inserted into the abdominal cavity using one of the access points used for the insertion of surgical tools. In order to overcome the loss of transmission from inside of the body to the external screen, we use an antenna placed at the tip of a needle inserted through the abdominal wall which facilitates the wireless transfer from within the body to the outside. This 2 mm thin needle, which can be inserted directly into the abdominal cavity or be embedded into one of the standard trocars, used in MIS procedures. The needle functions as mmWaveguide or coaxial transmission line through body tissue. Dielectric material can be used within the needle for further reducing its diameter. A single antenna can be used for transferring signals from multiple cameras and also transfer control signals to multiple cameras.
Minimally Invasive Surgery
- No need for cables attached to each camera
- Overcomes the loss of transmission associated with wireless transmission through body tissues
- Wireless transmission is confined to inflated cavity
- Multiple wireless cameras are supported, each may transmit in different frequency band or time slot
- The antenna needle can function both ways, enabling HDTV signals to be transmitted from inside out and also allowing control signals from the outside in