Dear Matt
Thanks for your response.
Conversations with the distributer of the laser resulted in them coming to
adjust the output power down to appropriate levels. Problem solved.
Interestingly, they said that they didn't check the aiming beam power before
delivery - only the treatment beam power. So this could be the case with all
these lasers.
This is a Lightmed laser, model LightLas 532, distributed by Litechnica.
I will be reporting this to MHRA so that a warning to other users can be
circulated.
Thanks once again for your help.
Regards
Peter
on 22-01-2009 11:21 am, Williamson Matt at [log in to unmask]
wrote:
> Peter
> What is the manufacturer's response.
> Eg when they do their quality checks how did it pass.
>
> You haven't named the device, so wondered if a few other centres could
> spot check their devices to see if it is a common flaw?
>
> I presume you have reported this to MHRA, and isolated the system.
>
> It would be useful for you to share the outcome with the list
>
> Matt Williamson
> Laser Protection
> Medical Physics & Engineering
> Leeds Teaching Hospitals NHS Trust
> Leeds General Infirmary
> Tel 01924 212900
> mob 07768 987956
> [log in to unmask]
> -----Original Message-----
> From: British Medical Laser Association [mailto:[log in to unmask]] On
> Behalf Of Peter Smith
> Sent: 15 January 2009 15:30
> To: [log in to unmask]
> Subject: Aiming Beam Output power
>
> Dear All
>
> I have a situation with a newly purchased laser which I have not
> encountered
> before and I would appreciate your advice.
>
> This is an Ophthalmic laser
>
> My concerns are with the aiming beam of the continuous wave laser. This
> aiming beam is designated as a CLASS 2, red laser diode (635-650nm), CW,
> power continuously variable up to a stated maximum output power of
> 1.0mW.
>
> The problem is that I have measured this output power as 1.4mW max i.e.
> the
> output power exceeds the stated maximum by 40% and, in my understanding,
> exceeds the maximum allowable to comply with its Class 2 rating.
>
> What would be your response to this? Has anyone come across this
> situation
> before with other lasers? I would appreciate any advice or suggestions
> you
> might have.
>
> Many thanks
--
Peter Smith
UV and Laser Protection Adviser
Medical Physics Department
Queen's Medical Centre Campus
Nottingham
Tel: 0115-924-9924 ext 64888
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