Illuminated surgical retractor
Illuminated surgical retractors include at least one retractor blade and a light delivery system. In some embodiments of the invention, the light delivery system includes a light emitter in the form of an elongated light emitting blade portion extending along the length of the retractor blade. The light emitter may be coupled to a light source integral with the retractor for illuminating all or a portion of the length of the light emitter or retractor blade. In other embodiments of the invention, the light delivery system may include an array of lights which may be attached directly to the retractor blade or to a support in the shape of an elongated blade that extends along the length of the retractor blade for illuminating all or a portion of the length of the retractor blade.
1. An illuminated surgical retractor comprising a thin walled heat conductive metal housing that is directly exposed to the atmosphere during use, an elongated first blade portion having one end connected to one end of said housing and another end remote from said housing, an elongated second blade portion extending along a length of said first blade portion, a light source contained within said housing, said light source being optically coupled to one end of said second blade portion for illuminating at least a portion of at least one of said first blade portion and said second blade portion, and a heat sink to which said light source is thermally coupled within said housing, said light source having an elongated body portion, and said heat sink comprising a relatively thick heat conductive metal end wall portion of said housing adjacent said one end of said housing that is directly contacted by a substantial portion of the length of said body portion for dissipating heat from said light source to said housing, wherein said light source has a pair of leads extending axially inwardly from an inner end of said elongated body portion, and said end wall potion is also directed contacted by a substantial portion of the length of one of said leads for dissipating heat from said light source to said housing.
2. The retractor of claim 1 wherein substantially the entire length of both said body portion and said one of said leads of said light source directly contact said end wall portion for dissipating heat from said light source to said housing.
3. An illuminated surgical retractor comprising a heat conductive metal housing that is directly exposed to the atmosphere during use, an elongated first blade portion having one end connected to one end of said housing and another end remote from said housing, an elongated second blade portion extending along a length of said first blade portion, a light source contained within said housing, said light source being optically coupled to one end of said second blade portion for illuminating at least a portion of at least one of said first blade portion and said second blade portion, said light source having a body portion and at least two leads extending from said body portion, wherein a substantial portion of the length of at least one of said leads is in direct contact with said housing for dissipating heat from said light source to said housing.
4. The retractor of claim 3 wherein said one end of said second blade portion extends into said one end of said housing in close proximity to said light source for optically coupling said one end of said second blade portion to said light source within said housing.
5. The retractor of claim 4 wherein said light source comprises a light emitting diode.
6. The retractor of claim 5 wherein said light emitting diode is powered by at least one of a battery and a fuel cell contained within said housing.
7. The retractor of claim 6 wherein said leads for said light emitting diode are connected to a printed circuit within said housing which provides an interface between said light emitting diode and said at least one of said battery and said fuel cell.
8. The retractor of claim 3 wherein said housing includes a handle portion.
9. The retractor of claim 8 wherein said handle portion includes a mounting post.
10. The retractor of claim 3 wherein said second blade portion is disposable, further comprising an attachment member for removably attaching said second blade portion to said first blade portion.
11. The retractor of claim 3 wherein said second blade portion comprises a light guide having a gradient printed dot pattern on at least one surface thereof for causing light to be emitted from at least a portion of said light guide.
12. The retractor of claim 3 wherein said second blade portion comprises a light guide having a pattern of light extracting deformities on at least one surface thereof for causing light to be emitted from at least a portion of said light guide.
13. The retractor of claim 12 wherein said light extracting deformities are arranged to direct light away from a user's eyes and toward a viewing area in proximity of said first blade portion.
14. The retractor of claim 3 wherein at least one of said first blade portion and said second blade portion is illuminated by said light source substantially the entire length of said at least one of said first blade portion and said second blade portion.
15. The retractor of claim 3 wherein a substantial portion of the length of said body portion is also in direct contact with said housing for dissipating heat from said light source to said housing.