Apparatus for cervical videoscopy

• US 4,905,670 A
• Filed: 12/28/1988
• Issued: 03/06/1990
• Est. Priority Date: 12/28/1988
• Status: Expired due to Term

• Current Assignee: Micro-Medical Devices, Inc.
• Original Assignee: Edwin L. Adair
• Inventors: Adair, Edwin L.
• Primary Examiner(s): Hindenburg, Max
• Application Number:
  US07/291,238
• Time in Patent Office: 433 Days
• Field of Search: 128/3, 128/6, 128/17, 128/18, 354/62, 358/98
• US Class Current: 600/104
• CPC Class Codes: A61B 1/043 for fluorescence imaging
• CPC Class Codes: A61B 1/05 characterised by the image sensor, e.g. camera, being in the distal end portion
• CPC Class Codes: A61B 1/0607 for annular illumination
• CPC Class Codes: A61B 1/0638 providing two or more wavelengths
• CPC Class Codes: A61B 1/0669 at proximal end of an endoscope
• 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 18/24 with a catheter A61B18/26, A61B18/28 take precedence
• CPC Class Codes: A61B 2218/008 for smoke evacuation
• CPC Class Codes: A61B 5/0071 by measuring fluorescence emission
• CPC Class Codes: A61B 5/0084 for introduction into the body, e.g. by catheters A61B5/1459 takes precedence

Abstract

A simple yet highly useful cervical videoscope has been provided which can easily be used by the doctor to examine the cervix for cancerous lesions or other abnormalities. Also, because of the small size of the camera there is sufficient space between the camera and the blades of the speculum for inserting forceps and other instruments that may need to be used. By using the cervical videoscope in combination with a monochromator the physician can step the wavelength of light from one end of the light spectrum to the other until he observes florescence which identifies abnormal cells. Thereupon, he can destroy the cells by use of a laser beam. When the observes that no more florescence is occurring, then he can discontinue the operation of the laser, knowing that the lesion has been completely eradicated. Also, a channel for drawing a suction to remove smoke created by the destruction of the lesion can be provided. Finally, the camera is adjustable along a guide on the fixed blade of the speculum to focus it.

Claims

1. A cervical videoscopy apparatus including a vaginal speculum having a first fixed blade, a second blade mounted for pivotal movement toward and away from said fixed blade and spring means normally urging said second blade toward said fixed blade, the improvement comprising:

a video camera mounted on one of said blades for viewing the cervix;

means providing light to the cervix;

means for focusing said camera on a selected cite on the cervix; and

means providing a signal from said camera to a video monitor for viewing the cervix and identifying lesions thereon.

2. Apparatus, as claimed in claim 1, wherein said focusing means includes:

a track mounted longitudinally along one of said blades; and

means for adjustably positioning said camera along said track for focusing.

3. Apparatus, as claimed in claim 2, wherein said light providing means includes:

a light carrier on said track for providing light to the cervix.

4. Apparatus, as claimed in claim 3, wherein:

said light carrier surrounds said camera focusing means to provide light to illuminate the cervix.

5. Apparatus, as claimed in claim 4, wherein said light providing means includes:

means for selecting light for illumination of the cervix at any one of a range of light frequencies.

6. Apparatus, as claimed in claim 5, wherein:

light is provided at any frequency from 200 nm through 1100 nm.

7. Apparatus, as claimed in claim 5, wherein said selecting means includes:

means for stepping sequentially through all of the available frequencies.

8. Apparatus, as claimed in claim 7, wherein said stepping means includes;

a monochromator for converting light from a light source to a single frequency at an output in the form of a rectangular slit; and

means connecting said slit to said light

9. Apparatus, as claimed in claim 8, wherein said light carrier includes:

a bundle of optical fibers having a first end and a second end;

a rectangular collar receiving and holding said fibers at said first end of said bundle in a rectangular configuration; and

a circular collar receiving and holding said fibers at said second end of said bundle in a circular configuration to convert the light from a slit to a round column of light for transmission to said light carrier.

10. Apparatus, as claimed in claim 5, wherein said selecting means includes:

selected band pass filters.

11. Apparatus, as claimed in claim 5, wherein said selecting means includes:

laser illumination of selected frequencies.

12. Apparatus, as claimed in claim 2, further including:

a laser channel on said track positioned to direct a laser beam to vaporize lesions on the cervix seen with said camera.

13. Apparatus, as claimed in claim 12, further including:

a suction tube on said track positioned to remove smoke when the lesions are being vaporized.

14. Apparatus, as claimed in claim 2, wherein said track and adjusting means includes:

a guide attached to and extending longitudinally along said fixed blade;

a worm gear rotatably mounted on said guide;

a rack attached to and extending longitudinally of said camera which is in engagement with said worm gear; and

a rotatable control shaft to rotate said worm gear to adjust the position of said camera along said fixed blade to focus said camera on selected portions of the cervix.