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1. Persyst 12 EEG Review and Analysis Software is intended for the review. monitoring and analysis of EEG recordings made by electroencephalogram (EEG) devices using scalp electrodes and to aid neurologists in the assessment of EEG. This device is intended to be used by qualified medical practitioners who will exercise professional judgment in using the information. 2. The Seizure Detection component of Persyst 12 is intended to mark previously acquired sections of adult (greater than or equal to 18 years) EEG recordings that may correspond to electrographic seizures, in order to assist qualified clinical practitioners in the assessment of EEG traces. EEG recordings should be obtained with a full scalp montage according to the standard 10/20 system. 3. The Spike Detection component of Persyst 12 is intended to mark previously acquired sections of the patient's EEG recordings that may correspond to spikes. in order to assist qualified clinical practitioners in the assessment of EEG traces. The Spike Detection component is intended to be used in patients at least one month old. Persyst 12 Spike Detection performance has not been assessed for intracranial recordings. 4. Persyst 12 includes the calculation and display of a set of quantitative measures intended to monitor and analyze the EEG waveform. These include FFT, Rhythmicity, Peak Envelope, Artifact Intensity, Amplitude, Relative Symmetry and Suppression Ratio. Automatic event marking is not applicable to the quantitative measures. These quantitative EEG measures should always be interpreted in conjunction with review of the original EEG waveforms. 5. The aEEG functionality included in Persyst 12 is intended to monitor the state of the brain. The automated event marking function of Persyst 12 is not applicable to aEEG. 6. Persyst 12 provides notifications for seizure detection, quantitative EEG and aEEG that can be used when processing a record during acquisition. These include an on screen display and the optional sending of an email message. Delays of up to several minutes can occur between the beginning of a seizure and when the Persyst 12 notifications will be shown to a user. Persyst 12 notifications cannot be used as a substitute for real time monitoring of the underlying EEG by a trained expert. 7. Persyst AR (Artifact Reduction) is intended to reduce EMG, eve movement, and electrode artifacts in a standard 10-20 EEG recording. AR does not remove the entire artifact signal, and is not effective for other types of artifacts. AR may modify portions of waveforms representing cerebral activity. Waveforms must still be read by a qualified medical practitioner trained in recognizing artifact, and any interpretation or diagnosis must be made with reference to the original waveforms. 8. This device does not provide any diagnostic conclusion about the patient's condition to the user.

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The PressOn™ electrode is intended for use in the recording of the electroencephalogram (EEG), the evoked potential (EP), or as ground and reference in an EEG or EP recording.

The PressOn electrode is a single-use, disposable EEG electrode. The electrode is very small, with a footprint of approximately 0.6 cm and a very thin (~0.004 inch) height profile. It is made from a super-elastic Nitinol and is flexible. The electrode has 3 legs (a tri-pod configuration) that each terminate in micro-teeth that penetrate the top layers of the scalp dermis during subdermal electrode placement. The PressOn electrode is used in conjunction with an accessory PressOn lead that is provided non-sterile and is reusable. The lead is approximately 48" in length and is used to connect one of the PressOn electrodes to a commercially available EEG monitor. The EEG monitor/ equipment is not part of the PressOn device offering.

This software is intended for use by a trained EEG technician or neurologist.

The Persyst Reveal is a software only product. It runs on a personal computer and requires no specialized hardware. It identifies spike and seizure events are then reviewed, possibly deleted, and interpreted by the user. The digitized EEG input is read from a file on the personal computer (or available across the network). Neither the computer nor the software control the delivery of energy, the administration of parenteral drugs, or another form of life sustaining function to the patient. No diagnostic or effectiveness claims are made.

This product is intended for use by a trained EEG reader. This software is intended for use by a trained EEG technician or neurologist.

The Persyst Prism is a software only product. It runs on a personal computer and requires no specialized hardware. It displays digitized EEG signals, power spectra, topographic maps, etc. These functions are all controlled and interpreted by the digitized EEG input is read from a file on the personal computer (or available across the network). Neither the computer nor the software control the delivery of energy, the administration of parenteral drugs, or another form of life sustaining function to the patient.