Richard
I'd be interseted to see a pic!
Barry Taylor, Clinical Scientist
Bioengineering Department
Tulley Medical Physics Building, Hull Royal Infirmary
Anlaby Road, Hull HU3 2JZ
Tel 01482 675928, fax 01482 675750
> ----------
> From: Richard Caley[SMTP:[log in to unmask]]
> Reply To: A discussion list for Assistive Technology professionals.
> Sent: 14 November 2001 09:38
> To: [log in to unmask]
> Subject: Re: EMG Switching
>
> Dear Barry,
> The switch is optical. My experience of commercial optical switches is
> that they are difficult to align, are not mechanically stable, not
> supportable by caregivers and consequently are therefore a last resort.
> This is the only reason I considered a custom design. The headband holds
> the eyebrow sensor in the optimum position and it seems quite stable. I
> could Email you some pictures of the configuration if you wish to see
> more. The switch is designed for a Brain Stem Infarct patient on our
> Neuro rehab unit. He could only move his eyelids for the first year and a
> half but he has now recovered some facial muscles. The eyebrow is now a
> controlled movement. Having a sensor close to the eye is a risk so I made
> another sensor to take advantage of the eyebrow movement although this is
> a more tiring movement for him to perform. His partner fits the headband
> and switch and he has been able to operate his communicator for several
> hours at a time.
>
> Regards
> Richard
> >>> [log in to unmask] 11/13/01 02:50pm >>>
> Richard
> Your switch sounds interesting. How have you arranged setup by caregivers
> to be easy? Is the eyebrow detection optical also?
> Barry Taylor, Clinical Scientist
> Bioengineering Department
> Tulley Medical Physics Building, Hull Royal Infirmary
> Anlaby Road, Hull HU3 2JZ
> Tel 01482 675928, fax 01482 675750
>
> > ----------
> > From: Richard Caley[SMTP:[log in to unmask]]
> > Reply To: A discussion list for Assistive Technology professionals.
> > Sent: 13 November 2001 14:25
> > To: [log in to unmask]
> > Subject: Re: EMG Switching
> >
> > Dear Neil and All,
> > After several months of perseverance I have successfully produced a
> custom
> > eye blink & eyebrow switch, for a brain stem infarct patient, which
> mounts
> > on a headband. The optical sensor is a Sharp IS471F (RS564-396) and
> infra
> > red emitter Sharp GL480 (RS577-538). The prototype is reliable and is
> > easily fitted by care workers. I will shortly be producing a PCB
> version.
> > I also looked at the Cyberlink system but considered that the EEG
> analysis
> > may be affected by the patients injury.
> >
> > Richard W Caley
> > Clinical Scientist (Rehabilitation)
> > Pinderfields Hospital
> > Wakefield
> >
> > >>> [log in to unmask] 11/12/01 02:07pm >>>
> > Dear All,
> >
> > Does anybody have some good ideas about reliable EMG sensing equipment
> > used to create an on/off output, i.e. for switching. The device would
> need
> > to easily set up by a non-technical person and as small as possible.
> > Isolation of the patient electrically is of course paramount.
> >
> > Devices we've tried in the past are listed below. We would now like to
> > extend our possibilities.
> > ProComp from Though Technology, http://www.thoughttechnology.com
> > and Myo-electric from Aleph 1, http://www.aleph1.co.uk/bio/ds02.html
> >
> > To give you some background we have various patients/clients with brain
> > injuries such as Brain Stem Stroke that result in only eye movement or
> > cheek movement and we want to use this movement functionally for as much
> > communication independence as possible.
> >
> > Thanks,
> >
> > Neil Gregory
> > Clinical Engineer
> > Access to Communication and Technology
> > West Midlands Rehabilitation Centre, England
> > [log in to unmask]
> > Tel. UK +44 (0)121-627 8235
> > Fax. UK +44 (0)121-627 8892
> >
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> >
> >
>
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