Dear all.
The Department of Healthcare Science at the West Midlands Rehabilitation
Centre have developed a device in response to the needs of some of our
clients with profound loss of gross motor movement.
Our intention is to begin marketing these when all of the consideration
surrounding the marketing issues have been resolved.
The device consists of a sensor unit and a controller unit. For scale
references the connector on the sensor is a 2.5mm diameter 4 pole jack.
The controller unit is nominally 9cm by 6cm by 3cm and is microprocessor
based. The sensor responds to changes in angle or inertial changes in
position. There are three optically isolated relay outputs. X axis, Y
axis and X-OR-Y. There is a sensitivity adjustment. LED's indicated
when the output relays are active.
The sensor will for instance respond to "eyebrow flash" when attached
just above the eyebrow. In the same position it can be triggered by
clacking the teeth/jaw together. When placed on a rigid surface, it will
respond to tapping the surface with a fingernail or tool.
Importantly, the controller constantly re-zeroes itself, so gradual
changes in position of the sensor do not stop the sensor from working.
The control unit requires an external power supply of between 4.5v and
12v AC or DC. The electronics are isolated from this supply by a DC-DC
convertor.
We are currently exploring sensor attachment methods. Granuflex is one
option, however a simple elasticated strap is also likely to be
required.
The system will have the CE marking when we have finished the testing
and documentation.
We plan to post some video on YouTube of the system in action - when we
have taken some video.
Happy to take questions on or off line.
Geoff
G.J.Harbach I.Eng MIED IIPEM ATPsoc
Registered Clinical Technologist
Rehabilitation Engineering Specialist
Department of Healthcare Science
West Midlands Rehabilitation Centre
91 Oak Tree Lane, Selly Oak.
Birmingham B29 6JA
Tel 0121 466 3066
[log in to unmask]
[log in to unmask]
www.actwmids.nhs.uk
________________________________________
From: A discussion list for Assistive Technology professionals.
[[log in to unmask]] On Behalf Of Taylor, Barry
[[log in to unmask]]
Sent: 11 July 2012 10:39
To: [log in to unmask]
Subject: Muscle twitch switch
Dear all
Does anyone have experience with a switch which attaches to the skin &
detects muscle twitch? For nurse call for a high level tetraplegic.
I remember one that used a small air bladder like an apnoea sensor but
never used one & can't find it now.
I'm aware:
* the "impulse" switch is no longer available.
* D4D put out a call to design an emg switch
* Enabling device twitch switch - never seen one - is it supplied in
UK?
Barry
Barry Taylor, Clinical Scientist
Medical Physics Service
Tulley Medical Physics Building, Hull Royal Infirmary Anlaby Road, Hull
HU3 2JZ
Tel: 01482 608971, Fax: 01482 608951
Internal extension HRI 608971
[log in to unmask]
[log in to unmask]
Web page http://www.hey.nhs.uk/content/services/rehabEngineering.aspx
[http://www.hey.nhs.uk/emailfooter/image.jpg]
Please consider the environment before printing this email.
The content of this email and any attachment is private and
confidential. If you are not the intended recipient, any use,
disclosure, copying or forwarding of this email and/or its attachments
is unauthorised. If you have received this email in error please notify
the sender by email and delete this message and any attachments
immediately. Nothing in this email shall bind the Trust in any contract
or obligation, unless we have specifically agreed to be bound.
Virus Warning:
Although this email and any attachment are believed to be free from
viruses, which might affect any system into which they are received or
opened, it is the responsibility of the recipient to ensure that they
are virus free. Hull and East Yorkshire Hospitals NHS Trust accepts no
responsibility for any loss or damage arising in any way from their
receipt, opening or use.
************************************************************************
********************************************
This message may contain confidential information. If you are not the
intended recipient please inform the sender that you have received the
message in error before deleting it.
Please do not disclose, copy or distribute information in this e-mail or
take any action in reliance on its contents:
to do so is strictly prohibited and may be unlawful.
Thank you for your co-operation.
NHSmail is the secure email and directory service available for all NHS
staff in England and Scotland NHSmail is approved for exchanging patient
data and other sensitive information with NHSmail and GSi recipients
NHSmail provides an email address for your career in the NHS and can be
accessed anywhere
************************************************************************
********************************************
|