Electronystagmography is a study used to clinically evaluate patients with dizziness, vertigo, or balance dysfunction. It provides exact measurements of eye movements rather than the objective observation of standard caloric stimulation. It can record behind closed eyelids or with the head in a variety of positions. It is used to determine whether a balance or nerve disorder is the cause of dizziness or vertigo.

Electronystagmography (ENG) systems are used to evaluate people with vertigo and certain other disorders that affect hearing and vision. Electrodes are placed at locations above and below the eye to record electrical activity. By measuring the changes in the electrical field within the eye, ENG can detect nystagmus in response to various stimuli. If nystagmus does not occur upon stimulation, a problem may exist within the ear, nerves that supply the ear, or certain parts of the brain.

Electrooculography is a method for measuring the resting potential of the retina. The resulting signal is called the electrooculogram. It is used to assess the function of the pigment epithelium. During dark adaptation, the resting potential decreases slightly and reaches a minimum after several minutes. When the light is switched on, a substantial increase of the resting potential occurs, which drops off after a few minutes when the retina adapts to the light. The patient is asked to switch the eye position repeatedly between two points (usually to the left and right of the center). Since these positions are constant, a change in the recorded potential originates from a change in the resting potential.

Electroretinography (ERG) system is used to measure the electrical response of the eye's light-sensitive cells (rods and cones). It records the changes in electropotential across the retina upon a flash stimulus. Electrodes are placed on the cornea and the skin near the eye. During a recording, the patient is watching a standardized stimulus and the resulting signal is interpreted in terms of its amplitude and time course.

Electrosonograph records the frequency and amplitude of the noise produced as well as the position in the opening/closing at which sound is produced. These microphones measure joint sounds and where they occur as you open & close the mouth.

Electrosurgery is the application of a high-frequency electric current to human tissue as a means to remove lesions, staunch bleeding or cut tissue. Electrosurgery are used to cut, coagulate, desiccate or fulgurate tissue. Electrosurgery uses alternating current to directly heat the tissue itself. Electrosurgery is commonly used for dermatological procedures as removal of skin tags, removal/destruction of benign skin tumors and the removal of warts. Electrosurgery is performed using a device called a electrosurgical generator.

Ear probe is inserted into an ear canal of a subject during auditory testing. The probe includes a base portion and a cap portion. The base portion of the probe houses electronic components for sound generation, transmission and collection. The cap portion of the probe includes features mechanical attachment of the tip to the probe in such a way as to provide a tight acoustic seal between the probe and the tip. The tip is disposable and protects the probe from occluded by debris in the ear canal.

Electrosurgery, Forceps are the instruments with two blades/pincers and a handle used for handling, grasping, or compressing. These forceps are usually made of high-grade stainless steel. These are also used to grip suture needles without causing damage.

Electrosurgical hooks are useful as blunt dissectors prior to activation. These hooks are used to isolate the tissue that is divided by the current. The tip is passed into or under a layer of the tissue being dissected, which is then hooked and tented up. The hooks are also used to clear unwanted tissue beside linear structures by passing the hook into the tissues parallel to the structure, and then rotating it to hook up strands of unwanted tissue.

Electrosurgery, Tissue Forceps minimizes sticking to tissue of a patient. The forceps include a pair of electrically conducting blade members extending from an insulated cap portion. The blade members include an inner layer of copper or copper alloy having a thickness sufficient to dissipate heat generated at the tip to prevent sticking of tissue to the forceps during use.