Lifelines Photic User Manual
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Lifelines Photic User Manual

Stimulator
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Stimulator
USER MANUAL
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  • Page 1 Stimulator USER MANUAL Imagine EEG Anywhere...
  • Page 2 Issue: CCN: CCN126 Digitally signed by Geoff Created Salter Date: 2020.04.22 10:44:48 +01'00' Digitally signed by David Hulin DN: cn=David Hulin, o=Lifelines Ltd, Checked ou=Development, email=david.hulin@llines.com, c=GB Date: 2020.06.15 14:25:49 +01'00' Digitally signed by Geoff Approved Salter Date: 2020.06.15 14:30:36...
  • Page 3 Lifelines representative and for any malfunctions caused by any parts that have been damaged or modified by anyone other than a qualified Lifelines representative. The owner of this system has the sole responsibility for the connection of this product to other systems which do not satisfy the electrical safety requirements of standards IEC 60601-1 and IEC 60601-1-2 for medical devices.

  • Page 4: Disclaimers & Warranties

    The information in this section is subject to change without notice. Except as stated below, Lifelines makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Lifelines shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance or use of this material.
  • Page 5 EMC information provided in the Appendix. Software and Virus Protection Lifelines takes all reasonable steps to ensure that its software is virus-free. In line with modern computing practice, it is advisable that continual protection against viruses, Trojans, malware, adware etc. is provided on the PC used for installation and the surrounding systems.

  • Page 6: Table Of Contents

    2.6 Maintenance and cleaning .................................. 14 2.7 Disposal of equipment .................................... 14 Connections for Photic Stimulator setup .....................15 Overview ..........................................15 3.2 Connecting the Photic Stimulator ..............................16 3.3 Switching on ........................................17 Photic Stimulator Setup Software ........................18 Installation ........................................18 4.2 Overview ..........................................
  • Page 7 Figure 1: Connecting the Photic Stimulator ............................15 Figure 3: Photic not connected (Manual Stimulation) ......................18 Figure 4: Photic connected (Manual Stimulation) ........................19 Figure 5: Photic connected and running (Manual Stimulation) ..................19 Figure 6: Sweep Stimulation ..................................20 Figure 7: Sweep Stimulation setup ................................21 Figure 8: Complex Stimulation ..................................

  • Page 8: System Overview

    Portable RF communications equipment (including peripherals such as antenna cables and external antennas) should be used no closer than 30 cm (12 inches) to any part of the Photic, including cables specified by Lifelines Ltd. Otherwise, degradation of the performance of this equipment could result.

  • Page 9: Explanation Of Symbols

    USER MANUAL System Overview Explanation of symbols Symbol Description Follow operating instructions Attention consult accompanying documentation Input/output connection Output connection Off On Manufacturer European Representative Special recycling required* Special recycling required, do not dispose of in landfill. When this equipment has reached the end of its useful life, it must be disposed of in an environmentally-friendly way.

  • Page 10: The System And Its Parts

    USER MANUAL System Overview The system and its parts The Photic Stimulator is a high performance solid-state flash stimulator used in the fields of Electroencephalog- raphy (EEG) and Visual Evoked Potentials. The system comprises the following components: Component Part Number...

  • Page 11: Specifications And Safety

    USER MANUAL System Overview Specifications and safety Electrical Safety and EMC The system has been certified and complies with the following standards Standard Description IEC 60601-1 Standard for medical electrical equipment, general requirements. UL60601-1:2003 USA standard for medical electrical equipment, general re-quirements. CAN/CSA 22.2 No 601.1 M90 Canadian standard for medical electrical equipment, general requirements.

  • Page 12: Description Of The Components

    Refer to Figure 1 for the system setup. The Photic Stimulator is typically placed 30 cm in front of the patient’s eyes. The operator would normally stand in front of the patient in order to observe any physiological effects during the test. Other persons are excluded from the area.
  • Page 13 System Overview Optional Interface Cables The following, optional, interface cables can be used to interface the Photic Stimulator to 3rd party EEG equipment. USB Splitter Cable The allows the Photic to be used at full power by using 2 USB ports. Most USB ports can supply the full-power, intermittent current required by the unit and a USB splitter cable is not normally required.

  • Page 14: Installation And Maintenance

    3 Assembly instructions for third-party products will be found in their packing cases. It is recommended that these instructions be filed with Photic Stimulator technical reference materials. 4 Check for signs of damage that may have occurred during transit or storage. If any damage is found, do not use the instrument;...

  • Page 15: Power Supply Connections

    Interference The Photic Stimulator will continue to operate in the presence of radio frequency magnetic fields (RF) and the ef- fects of electrostatic discharges (ESD) and other interference, in accordance with the requirements of EN60601-1-2.

  • Page 16: Maintenance And Cleaning

    All the outer surfaces of the Photic Stimulator system may be cleaned using a soft cloth moistened with water and detergent. Each item may also be cleaned using a low-pressure air-line or a vacuum cleaner.

  • Page 17: Connections For Photic Stimulator Setup

    USB cable (optional) BNC trig. input Ext. trigger input + power Hirose power and trig. input Hirose cable (optional) Figure 1: Connecting the Photic Stimulator List of parts List of optional parts Photic Stimulator Interface cables - various Photic USB Cable...

  • Page 18: Connecting The Photic Stimulator

    12 – 15V is detected by the Photic and in this mode the pulse width of the incoming trigger signal determines the flash pulse width. In this way, it is possible to control the intensity.

  • Page 19: Switching On

    Connections for Photic Stimulator Setup External Trigger Output (non-isolated) This signal is provided on a connector at the host-end of the Photic interface cable. It is a TTL type signal and is used to provide a synchronisation trigger output pulse to the PC.

  • Page 20: Photic Stimulator Setup Software

    Installation The USB drivers will be found on the installation CD. Upon first connection of the Photic to the PC USB port, at the Windows prompt, browse to the folder CD Drive:\USB Drivers. From there, Windows will find the correct drivers for the version of Windows being used.

  • Page 21: Figure 4: Photic Connected (Manual Stimulation)

    When a Photic is found connected to the PC, the Status Bar information displays either “Photic On” or “Photic Off” depending on the state of the On/Off switch at the rear of the unit. With no Photic connected or when no flash stimulation is in progress, the Title Bar will display “Photic Stimulator (Stopped).

  • Page 22: Manual Stimulation

    MANUAL Photic Stimulator Setup Software Manual Stimulation Manual Stimulation allows for simple, manual control of the Photic flash rate, intensity and duration, as shown in Figure 5 above. Rate Use the slider control to vary the repetition rate from 1 Hz to 60 Hz.

  • Page 23: Figure 7: Sweep Stimulation Setup

    USER MANUAL Photic Stimulator Setup Software This allows a sweep of ascending flash repetition rates to be delivered. The Start Frequency, Stop Frequency and the Dwell Time for each 1Hz increment can be set and the Intensity. The list displays each frequency increment with the current active step highlighted.

  • Page 24: Complex Stimulation

    USER MANUAL Photic Stimulator Setup Software Complex Stimulation Figure 8: Complex Stimulation This allows complex trains or sequences of flashes including gaps to be delivered. Up to 64 individual sequence steps can be programmed for Rate, Intensity and Step Time. Programming a 0 for rate indicates a gap of defined length with no flash stimulation.

  • Page 25: Setup 1

    Keyboard Shortcuts You can select which keyboard key will start and stop the Photic flashing. Note that this key will work regardless of whether the Photic Control application has the Windows focus or not. Select ‘none’ to disable the feature.
  • Page 26 Photic Stimulator Setup Software Power Control You can select whether you are using 1 or 2 USB ports. Note that the Photic automatically detects when external power is applied. Note that when using a single USB port, the Photic will automatically limit its power consumption to 0.5A, which is the maximum available from a single port.

  • Page 27: Figure 11: Setup 2

    Also here, is the option to set the default flash intensity and duration when the unit is being triggered externally. This is set once over the USB interface and stored inside the Photic unit’s flash memory for use at every subsequent switch-on.

  • Page 28: Shutdown Procedure

    PWM trigger signal to control the intensity of the Photic unit. In the above parameter, the Dur value is set to 15 to set this special mode in the Photic unit. The intensity can be set as required to 1 to 7, as above.

  • Page 29: Appendix 1: Photic Stimulator Specifications

    USER MANUAL Appendix 1 Appendix 1: Photic Stimulator Specifications Lifelines reserves the right to change product specifications at any time without notice. This is in line with the company’s policy of continual product development. Light Output Light source Single hi-intensity LED and associated optics...
  • Page 30 USER MANUAL Appendix 1 Safety and EMC standards The system has been certified and complies with the following standards: IEC 60601-1 International standard for medical electrical equipment, general requirements. UL60601-1:2003 USA standard for medical electrical equipment, general requirements. CAN/CSA 22.2 No 601.1 M90 Canadian standard for medical electrical equipment, general requirements.

  • Page 31: Appendix 2: Connection Details

    Photic internal flash memory parameter 1 – 10ms (which also sets the intensity from 1 - 7). With 5V applied and under USB control, the Photic can be under full USB control whilst also being able to be externally triggered (USB takes precedence).
  • Page 32 1242 6882 None Provides ext. 15V power and ext. trigger input. Hirose Photic USB Plus D-26 Trig I-O Cable 5m (USBIFB) USB or or NKProvides USB power & external trigger 1269 6899 input & non-isolated output on D26 suitable for USBIFB (I/P) or Adaptor cable (I/P or O/P) (see below).

  • Page 33: Appendix 3: Manufacturer's Declaration

    Portable RF communications equipment (including peripherals such as antenna cables and external antennas) should be used no closer than 30 cm (12 inches) to any part of the Photic Stimulator, including cables specified by Lifelines Ltd. Otherwise, degradation of the performance of this equipment could result.
  • Page 34 Electromagnetic Emissions IEC 60601-1-2 / EN 60601-1-2 The Photic Stimulator is intended for use in the electromagnetic environment specified below. The customer or user of the Photic Stimulator should assure that it is used in such an environment. Emissions Test...
  • Page 35 RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which the Photic Stimulator is used exceeds the applicable RF compliance level above, the Photic Stimulator should be observed to verify normal operation.
  • Page 36 The Photic Stimulator is intended for use in the electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of the Photic Stimulator can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the Photic Stimulator as recommended below, according to the maximum output power of the communications equipment.

  • Page 37: Version History

    V1.5 (15 December 2009) y First release V1.6 (15 June 2010) y Lifelines logo adjusted on page 3. y Virus protection recommendations added, Page 5. y Details of Light Hazard Protection according to ISO 15004 added, Page 11 and Specifications, page 32.
  • Page 38 Stimulator Lifelines Ltd, 7 Clarendon Court, Over Wallop, near Stockbridge, Hampshire SO20 8HU, UK Telephone +44 (0)1264 782226 www.LLines.com sales@LLines.com Imagine EEG Anywhere...

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