What is SEEG (Stereoelectroencephalography)?
SEEG is a minimally invasive diagnostic procedure for drug-resistant focal epilepsy. The objective is to identify the epileptic foci. To do so, electrodes are implanted in predefined brain parts to record electrical activities and epileptic seizures.
Advantages of Dixi Electrodes:
sEEG with DIXI electrodes is used to identify and map the epileptogenic zone in patients with drug-resistant focal epilepsy, helping to determine if they are candidates for surgery.
All tools have a diameter of 2.45 mm and fit in a guiding tube of 2.5 mm
Treatment of Refractory Seizures: Through thermocoagulation, they can be used to treat refractory seizures by creating lesions in the
epileptogenic zone.
The materials used, such as platinum-iridium, ensure high-quality, reliable recordings of brain electrical activity.
Thermocoagulation Capabilities: DIXI electrodes can be used for radiofrequency thermocoagulation (RFTC), enabling targeted lesioning of the epileptogenic zone during the same procedure. This offers a treatment option for patients who may not be suitable for surgical resection
This ability to thermocoagulation through the same electrodes used for recording, eliminates the need for additional procedures.
Compatibility and Technical Specifications: They are designed for compatibility with advanced stereotactic systems, like robotic
systems, which improve placement accuracy. The small diameter of the electrodes helps to reduce brain tissue
How to Create Your Own SEEG Electrode Kit ?
To start with the SEEG procedure, the surgeon should have either a robotic arm or a stereotactic frame. DIXI medical has created an SEEG kit as an all-in-one solution to provide. Starting from their vast range of SEEG electrodes, single as well as in combinations (available from 5 to 18 contacts) to the thermocoagulation set. A detailed
descriptive file containing the features of each component will be shared with the customers to help them understand the proposed kit.
What does this kit consist of?
List of items included in the kit:
Microdeep SEEG electrodes (5 to 18 contacts)
Connection cables (5 to 18 contacts)
Implantation accessories:
Implantation tools:
Bone Starter
Sliding Ruler
Coagulation Electrodes and Stop
Drill Bit and Stop
Guiding Screws
Caps for Guiding Screws
Stylet
Marking Rod
Screwdrivers
Depth Report device
Removal Tools:
Wrench
Screwdriver for the removal of Guiding Screws
Thermocoagulation accessories:
Selector box
Connection cable for INOMED N50 & Cosman G4 generator
Extension cable (90cm)
Sterile (Single Use) products:
Microdeep® SEEG Electrodes:
Diameter: 0.8 mm
Platinum / Iridium material
Total length: 100 cm
Available from 5 to 18 contacts
Active exploration length ranges from 16 mm to 80.5 mm
Specific stereotactic instruments provide accurate MICRODEEP® electrode positioning
A proprietary cap designed to prevent the electrode from moving, to ensure a good seal, and to serve as a depth maker
Suitable for thermocoagulation.
Drill Bit and Stop:
Drill bit to perforate the skull with suitable diameter for the use of guiding screw
Cutting diameter 2.1 mm
Drill bit total length: 200 mm
Cutting bit length: 20 mm
Single stop to control the depth of the drill bit
A dedicated screwdriver for securing the stop exists
Coagulation Electrodes and Stop:
To pierce and coagulate the dura mater
Single stop to control the depth
Guiding Screws:
Intended to be fixed into the bone through the skin.
Fits through the guide tube secured to the screwdriver to optimize the placement’s accuracy
Self-tapping tip allowing a direct fixing into a hole ø 2.1 mm
Specific threading to secure the electrode’s cap to the guiding screw
Flat area for removal using the wrench
Individually packed, delivered per box of 10
The guiding screws are available in 5 different lengths 15 to 35
Caps for Guiding Screws:
Used to obstruct the guiding screws before the placement of a MICRODEEP®
electrode
Stylet:
Used to perform the path of the electrode
Adjustable stop integrated
Non-Sterile (Reusable) products:
Connection Cables:
Suitable for connecting MICRODEEP® electrodes 5 to 18 contacts
Suitable for sterilization
DIN connectors compatible with most EEG acquisition systems
Overall length of 180 cm for greater flexibility at the EMU and creation of
damper
Bone Starter:
To pierce the skin and mark the skull before drilling
Marking Rod:
Used to define the appropriate distance between the stereotactic guide and the
top of the guiding screw
A dedicated single stop to autoclavable
Screwdrivers:
Long screwdriver used for the placement of the guiding screw ø 2.5 mm
Short screwdriver for single stop to adjust the tightening
Sliding Ruler:
Sliding ruler to measure the depth of DIXI medical implantation accessories
(Drill, Coagulation electrodes and Marking rod)
Wrench and Screwdriver for the removal of Guiding Screws:
Wrench to unlock and loosen the guiding screws
Insert the wrench on the two flat areas of the guiding screws
Short screwdriver to remove the guiding screws
Guiding Tube:
Used during SEEG procedures to accurately guide DIXI medical’s SEEG
instrumentation and accessories.
It provides help for the accurate placement of SEEG electrodes.
All implantation tools have an outer diameter of 2.45 mm and fit through a
guide tube of min 2.5 mm.
What is Thermocoagulation with DIXI medical electrodes?
Thermocoagulation with SEEG electrodes operates on the basic principle of using high frequency signals passed through a pair of contiguous macro-contacts on SEEG electrodes to generate heat, leading to the coagulation of adjacent tissues. In the context of epilepsy treatment, thermocoagulation has proven effective by disrupting the neuronal pathways responsible for the epileptogenic activity in the brain.
Accessories for Thermocoagulation:
Selector box for use in thermocoagulation with Microdeep® intracerebral
electrodes
Is intended to connect the electrode to an RF generator in order to perform a
thermal lesion between two consecutive contacts
The interface cables for use in thermocoagulation with the Microdeep® SEEG
electrode are intended to connect the electrode to a compatible RF generator*
in order to perform a thermal lesion between two consecutive contacts.
*The PCP-4*0 can be connected to two generators:
● Cosman G4 ● INOMED N50
● Cosman G4 ● INOMED N50