Simon
Do you have an electronic copy of the LED report that you did for the
HSE.
I have completely mislaid mine..its in the computer somwhere but.
Cheers
Bill
>>> [log in to unmask] 05/04/06 16:42:36 >>>
Angela, just to note, that in the Photonics Europe SPIE conference 3-7
Apr 2006, there was a paper in the Laser Interaction with Tissues
section "Effect of 655nm laser different powers on dog sperm motility"
M. Corral-Baques Univ. Rovira i Virgilli (Spain) I didn't go but have
got the proceedings on order.
Regards
Simon
--------------------------------------------
Simon Hall
Bld 95
Photonics
Enabling Metrology Division
National Physical Laboratory
Teddington, Middlesex
TW11 OLW
UK
--------------------------------------------
Telephone +44 (0)20 8943 6758/6829/6800
Local fax +44 (0)20 8943 6098
--------------------------------------------
webpage: http://www.npl.co.uk/electromagnetic/ufe-opto/lpe.html
> -----Original Message-----
> From: Bill Davies [mailto:[log in to unmask]]
> Sent: 05 April 2006 15:50
> To: [log in to unmask]
> Subject: Re: laser safety advice wanted by HFEA
>
>
> Angela
> As far as I am aware there have been no reported studies on
> the effects
> of low level radiation in the vfsible part of the spectrum on
gametes.
> The main hazard associated with scanning laser systems is the
> potential
> for thermal injury to the eye rather than non thermal damage
> directly to
> tissue. This is small unkless the scanner stops and beam cut
> off fails.
> At these power levels and wavelengths there I am not aware of any
> potential for photochemical damage ( photon energy generally too
small
> and multiphoton effects very unlikely).
> Obviously there are photoeffects in tissue at this wavelength but in
> short pulsed exposures at low irradiance there aooears to be little
> evidence of an issue.
> This particular issue has never been raised in the bioeffects
> and basic
> safety group of IECTC 76 but I will pass it around for any comments.
> Prof Dr K Greulich at the Institute for Molekular
> Biotechnology in Jena
> was studying work on assisted conception by laser drilling of the
ovum
> and it is possible that he may have some comments. The email
> for his co
> worker is [log in to unmask]
> Earlier Russion work on HeNe laser light in vitro used long exposure
> times.
> Bill
> >>> [log in to unmask] 04/04/06 14:24:44 >>>
> The email below was received by a colleague who sits on the IOP
> physics
> group. She has passed it to me and I wondered if anybody on this
list
> could help?
> Thanks
> Angela Cotton
> Head of Non-Ionising Radiation Support
> Southampton General Hospital
> Southampton
> SO16 6YD
> tel 023 8079 8616
> fax 023 8079 4117
> email: [log in to unmask]
>
> The Human Fertilisation and Embryology Authority (HFEA) principal
> tasks
> are to licence and monitor clinics that carry out in vitro
> fertilisation, donor insemination and human embryo research. We also
> regulate the storage of gametes (sperm and eggs) and embryos. We
> licence
> around 110 treatment and storage centres and a number of these
centres
> have started to explore the use of technologies such as bar coding
and
> radio frequency identification to help with tracking and identifying
> gametes and embryos in the laboratory and to aid witnessing
> procedures.
>
> Our Advisory Group on Safety and New Technologies (SANT) is
currently
> looking into the use of these technologies in the IVF laboratory.
>
> SANT are currently in the process of assessing the safety ofbar code
> scanners which use laser light. The main issue under consideration
is
> the potential for laser light to cause damage to gametes and
embryos,
> as
> these scanners would be used to read bar codes attached to dishes
and
> straws containing gametes and embryos.
>
> In order to fully understand the technology we are hoping to consult
a
> medical physicist, with knowledge in the area of lasers and damage
to
> human material, for some advice.
>
> I would be very greatful if you could recommend someone within the
> Medical Physics Group.
>
> Many thanks in advance,
>
> Hannah Darby
>
> Policy Officer
>
> Human Fertilisation and Embryology Authority
>
> 21 Bloomsbury Street
>
> London
>
> WC1B 3HF
>
> Tel 0207 291 8200
>
> Fax 0207 291 8201
>
>
>
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> Bill Davies C.Phys, C.Sci. F.Inst.P. MIPEM MSRP
> Consultant Clinical Physicist
> Department of Medical Physics
> Singleton Hospital
> Swansea NHS Trust
> Swansea SA2 8QA
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