Appeal No. 96-2043
Application 07/990,514
the catheter and extending to the distal end of the catheter
for emitting energy conducted therethrough in a direction
generally forwardly of the distal end of the catheter with
each waveguide having an energy conducting core made of
synthetic silica that is substantially free of metallic
impurities, and a pulsed XeCl Excimer laser having an output
wavelength of about 308 nm, with each pulse having a duration
between 100 nsec and 3000 nsec and being coupled into the
proximal end of the waveguides at a density of at least 50
mJ/mm .2
The examiner describes Hussein as teaching a catheter
device having a guidewire lumen, a laser and a plurality of
optical fibers. L'Esperance is described as teaching a pulsed
XeCl Excimer laser for ablating tissue without charring.
Guerder is described as teaching substantially pure synthetic
silica to make optical fibers. Davies is described as
teaching a pulsed Excimer laser having a wavelength and
density as called for in claim 1.
Seppala is described as teaching certain advantages for using
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