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isa:264677476
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An endoscopic guide system useable to facilitate trans-nasal advancement of a guidewire, catheter, instrument or other device to a position within or near the ostium of a paranasal sinus of a human or animal subject, said system comprising: a) a tubular guide having a proximal end, a distal end and a lumen that extends longitudinally therethrough, said tubular guide having a distal portion that is
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