Gain Insight into Brain Response with BIS™ Technology([FOOTNOTE=Dershwitz M. Should we measure depth of anesthesia? Seminars in Anesthesia, Perioperative Medicine and Pain. 2001; 20(4): 246-256.],[ANCHOR=View Abstract],[LINK=/content/covidien/websites/medtronic/com/en/covidien/support/clinical-evidence.html?id=804982])

BIS™ consciousness-­monitoring technology is clinically proven to indicate individual patient response to intravenous sedation:

  • Monitor displays real-­time EEG as well as continuous and trend BIS™ index values
  • Proven BIS™ index is easy to read and interpret with recommended ranges
  • BIS™ Extend Sensor is made specifically for use in the ICU
  • Objective assessment of sedation helps you deliver only what the patient requires

Features of BIS™ Extend (Extended Use) Sensor


  • The BIS™ extend (extended use) sensor offers:
    • Peel-­and-­stick simplicity
    • Zipprep™ technology
  • BIS™ technology when used with the BIS™ extend sensor provides features, such as a burst count, that may be helpful in certain patient populations and can also be used for longer-­term monitoring in critical care areas
  • BIS™ sensors collect electroencephalograph (EEG) data.
  • BIS™ technology enables simple EEG data collection via a noninvasive sensor applied to the patient’s forehead.



Parameter Description

Sensor dimensions 11 in x 1.1 in (approx.)
Weight 3.7 g (approx.)
Weight (packaged) 16.8 g (approx.)
Packaging 25 individually packaged sensors per box
Shelf life One and a half years from date of manufacture

Sensor Element Material Description

Connector (paddle) Polycarbonate plastic (incidental patient contact)
Tab stiffener Polycarbonate sheet (no patient contact)
  One side coated with adhesive
Module Copper/brass/Kapton®* (no patient contact)
Flexible circuit Polyester screen-printed with cured Ag/AgCl and dielectric inks (incidental patient contact)
Electrode gel Potassium chloride (KCl) aqueous gel
Electrode tines disk Green nylon plastic
Electrode sponge disk Polyurethane/polyester foam
Electrode tines retaining disk 1/32 in. white polyethylene foam (no patient contact)
  Both sides coated with medical-­grade adhesive
Basepad 1/16 in. white polyethylene foam
  Both sides coated with medical-­grade adhesive
Liner card Silicone-­coated high-impact polystyrene (no patient contact)
Packaging Paper/aluminum foil/polyethylene (no patient contact)

BIS™ monitoring technology provides valuable information about the status of your patients to help address their unique anesthetic requirements.

How does our sensor technology work to capture the low-­voltage EEG signal?

First, we use a conductive ink that is printed directly on the surface of the sensor, under the adhesive foam and Zipprep™ technology. This creates an electrode surface that is helpful in picking up the low-­voltage EEG.

Second, the Zipprep™ technology helps clear away the first layer of the epidermis. The mechanical action of pressing on the electrode results in the tines clearing away some of the first layer of dead skin cells, exposing the inner, more electrically conductive layer of skin. The conductive gel within the electrode permeates into this newly exposed area, creating a good electrical pathway between the EEG-­carrying inner layers of skin and the conductive traces within the sensor. The EEG signal is then carried through these traces to the BIS™ monitor.

Third, we include a thin layer of sponge that contains a very precise amount of gel. This gel creates a "bridge" between the forehead and the conductive electrode surface.

These combined components help achieve an optimal environment to acquire and maintain the EEG signal.