Various types of working sheaths for endoscope assisted or endoscopic surgery for lumbar and lumhosacraLspine are available, Most oflhem；require specialized instrumentS-and telescopes. ^ - procurements of which are beyond the reach of many hospitals in developing countries like India, mainly due to financial reasons. We have designed a universal working sheath which is compatible with rigid straight telesocpe (outer diameter- 4 mm, 0 degree, 18 cm long) available at most of the centres for various surgeries in other specialties. This working sheath is simple, sturdy and is compatible with instruments used in conventional lumbar and lumbosacral surgeries. It may be useful for resource scarce centres of developing countries and can be used with microscope also.
