Film illumination system

• US 20080002426A1
• Filed: 06/12/2007
• Published: 01/03/2008
• Est. Priority Date: 06/13/2006
• Status: Active Grant

• Current Assignee: Invuity, Inc. (Stryker Corporation)
• Original Assignee: Spotlight Surgical, Inc. (Stryker Corporation)
• Inventors: Trauner, Kenneth, Vayser, Alex, Grey, Thomas
• Granted Patent: US 7,686,492 B2
• Time in Patent Office: Days
• US Class Current: 362/574
• CPC Class Codes: A61B 1/0623 for off-axis illumination
• CPC Class Codes: A61B 1/07 using light-conductive means, e.g. optical fibres
• CPC Class Codes: A61B 1/24 for the mouth, i.e. stomatoscopes, e.g. with tongue depressors tongue depressors per se A61B13/00; Instruments for opening or keeping open the mouth combined with saliva removers A61C17/00; mouth openers for animals A61D15/00
• CPC Class Codes: A61B 1/32 Devices for opening or enlarging the visual field, e.g. of a tube of the body dilators A61M29/00
• CPC Class Codes: A61B 17/02 for holding wounds open; Tractors specula A61B1/32 ; drainage appliances for wounds A61M27/00
• CPC Class Codes: A61B 2090/306 using optical fibres
• CPC Class Codes: A61B 90/30 Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
• CPC Class Codes: A61C 1/088 Illuminating devices or attachments for examination of the mouth A61B1/24 and A61B1/06

Abstract

An illuminator film system may include one or more pre-cut sections of optical film applied to a waveguide to allow light to exit the waveguide through the film in a predetermined manner. The one or more pre-cut sections may be removed and reapplied during a procedure to redirect the light. A laminated illuminator film may be provided that uses a laminated optical film structure to direct light from a fiber optic input. Such a laminated illuminator film may be very low profile, low cost and easy to apply to a retractor for providing illumination during a surgical procedure.

Claims

1. A medical illuminator comprising:

a surgical retractor having a blade and a handle;

a waveguide secured to the retractor blade, the waveguide conveying light through total internal reflection;

a light conduit secured to the retractor handle, the light conduit conveying light from a light source to the waveguide; and

one or more pre-cut optical film pieces removably secured to the waveguide for extracting light from the waveguide through the pre-cut optical film and directing the extracted light to a surgical field.

2. The medical illuminator of claim 1 wherein the one or more pre-cut optical film pieces further comprise:

an optical film layer having a light directing portion and a tab portion;

the orientation of the tab portion relative to the light directing portion indicating the direction of extracted light from the light directing portion; and

an adhesive layer applied to the light directing portion for removably securing the light directing portion to the waveguide, the adhesive layer performing some index matching between the waveguide and the optical film layer.

3. The medical illuminator of claim 2 wherein the tab portion is color coded to indicate the degree of focus or directionality of the extracted light.

4. The medical illuminator of claim 1 wherein the one or more pre-cut optical film pieces further comprise:

an optical film layer having at least one diffuse light directing portion and at least one focused light directing portion; and

an adhesive layer applied to the light directing portions for removably securing the light directing portions to the waveguide, the adhesive layer performing some index matching between the waveguide and the optical film layer.

5. The medical illuminator of claim 2 further comprising:

at least one pre-cut optical film pieces removably secured to the waveguide for extracting diffuse light from the waveguide through the pre-cut optical film and providing the extracted light in the area of a surgical field;

at least one pre-cut optical film pieces removably secured to the waveguide for extracting focused light from the waveguide through the pre-cut optical film and directing the focused light to a selected portion of a surgical field.

6. A medical illuminator comprising:

a waveguide shaped to perform as a surgical retractor, the waveguide conveying light through total internal reflection;

a light conduit secured to the waveguide for conveying light from a light source to the waveguide; and

one or more pre-cut optical film pieces removably secured to the waveguide for extracting light from the waveguide through the pre-cut optical film and directing the extracted light to a surgical field.

7. The medical illuminator of claim 6 wherein the one or more pre-cut optical film pieces further comprise:

an optical film layer having a light directing portion and a tab portion, the orientation of the tab portion relative to the light directing portion indicating the direction of extracted light from the light directing portion; and

an adhesive layer applied to the light directing portion for removably securing the light directing portion to the waveguide, the adhesive layer performing some index matching between the waveguide and the optical film layer.

8. The medical illuminator of claim 7 wherein the tab portion is color coded to indicate the degree of focus or directionality of the extracted light.

9. The medical illuminator of claim 6 wherein the one or more pre-cut optical film pieces further comprise:

an optical film layer having at least one diffuse light directing portion and at least one focused light directing portion; and

an adhesive layer applied to the light directing portions for removably securing the light directing portions to the waveguide, the adhesive layer performing some index matching between the waveguide and the optical film layer.

10. The medical illuminator of claim 7 further comprising:

at least one pre-cut optical film pieces removably secured to the waveguide for extracting diffuse light from the waveguide through the pre-cut optical film and providing the extracted light in the area of a surgical field;

at least one pre-cut optical film pieces removably secured to the waveguide for extracting focused light from the waveguide through the pre-cut optical film and directing the focused light to a selected portion of a surgical field.

11. A medical illuminator comprising:

a light conduit having an input end and an output end, the conduit conveying light from a light source at the input end through the light conduit to the output end;

a laminated film termination secured to the output end of the light conduit for directing the light from the conduit output end to a surgical site, the laminated film termination including at least one layer of reflective film and at least one layer of transmissive film and at least one layer of adhesive securing the reflective film layer to the transmissive film layer and securing the laminated film termination to the light conduit.

12. The medical illuminator of claim 11 wherein the transmissive film layer further comprises a diffuse light portion and a focused light portion.

13. The medical illuminator of claim 11 wherein the laminated film termination further comprises:

an air chamber between the reflective film layer and the transmissive film layer along the length of the laminated film termination.

14. The medical illuminator of claim 11 wherein the laminated film termination further comprises:

a generally open frame between the reflective film layer and the transmissive film layer forming an air chamber along the length of the laminated film termination.

15. The medical illuminator of claim 11 further comprising:

a surgical retractor having a blade and a handle, the reflective film layer of the laminated film termination secured to the retractor blade with the transmissive film layer oriented to direct light into a surgical field, the light conduit removably secured to a portion of the retractor blade and the retractor handle.