Cyclo olefin polymer and copolymer medical devices
Medical retractors including light guides made of cyclo olefin polymer.
1. An illuminated surgical retractor system, said system comprising:
only a single optical waveguide for conducting light, the optical waveguide forming a cannula and having a proximal portion, a distal edge, an inner surface, and an outer surface, the cannula formed primarily of a cyclo olefin polymer and also having a bore sized and dimensioned to accommodate one or more surgical instruments;
one or more light conducting conduits coupled to the proximal portion of the waveguide for introducing light thereinto, wherein the one or more light conducting conduits conduct light from a light source to the waveguide; and
a plurality of light extracting structures disposed on either the inner surface or the outer surface proximal of the distal edge and distal to the proximal portion, the plurality of light extracting structures disposed at least partially circumferentially around the waveguide and adapted to extract light therefrom, the extracted light exiting a plurality of surfaces of the waveguide radially outward away from the plurality of light extracting structures.
2. The system of claim 1 , wherein the plurality of light extracting structures comprise one or more facets formed in the outer surface of the cannula.
3. The system of claim 2 , wherein the one or more facets comprise vertical facets.
4. The system of claim 1 , wherein the one or more light conducting conduits are integral with the proximal portion of the waveguide.
5. The system of claim 4 , wherein the one or more light conducting conduits comprise two generally rectangular light conduits integrally formed with the proximal portion of the cannula.
6. The system of claim 1 , wherein the one or more light conducting conduits comprise a bifurcated light input conduit.
7. The system of claim 1 , wherein an air gap is maintained circumferentially around the one or more light conducting conduits.
8. The system of claim 1 , further comprising an optical film disposed on a surface of the waveguide, wherein the optical film enhances total internal reflection therein.
9. The system of claim 1 , further comprising a coating disposed on a surface of the waveguide, wherein the coating enhances total internal reflection therein.
10. The surgical illumination system of claim 1 , wherein the cannula comprises a tubular shape.
11. The system of claim 1 , wherein the cannula comprises a tapered tubular shape.
12. The system of claim 1 , wherein the cannula comprises a cylindrical shape.
13. The system of claim 1 , wherein the cannula comprises a circular cross-section.
14. The system of claim 1 , wherein the cannula comprises a splitable tube.
15. The system of claim 1 , further comprising an optical fiber pigtail coupled with the one or more light conducting conduits.
16. The system of claim 1 , wherein the cannula comprises a cylinder having a longitudinal axis, and wherein the bore comprises a proximal opening defined by the cylinder having its proximal portion truncated by a plane transverse to the longitudinal axis.
17. The system of claim 1 , wherein the light extraction features comprise facets, microstructures or lenses.
18. The surgical system of claim 1 , wherein the cannula is configured such that the one or more surgical instruments directly engage the inner surface of the optical waveguide when the one or more surgical instruments are disposed in the bore.
19. The system of claim 1 , further comprising a light source optically coupled with the one or more light conducting conduits.