Laser tunnelling device

• US 4,207,874 A
• Filed: 03/27/1978
• Issued: 06/17/1980
• Est. Priority Date: 03/27/1978
• Status: Expired due to Term

• Current Assignee: Daniel S.J. Choy
• Original Assignee: Daniel S.J. Choy
• Inventors: Choy, Daniel S. J.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Rose, Arthur S.
• Application Number:
  US05/890,353
• Time in Patent Office: 813 Days
• Field of Search: 350/96.26, 350/96.24, 128/305, 128/395-397, 128/276, 128/4, 128/5, 128/6, 128/7, 128/8, 128/303.1, 128/304, 128/311, 128/328, 128/348, 128/356, 128/2 A, 128/2 M, 128/2 V, 219/121 L, 219/121 LM
• US Class Current: 600/108
• CPC Class Codes: A61B 1/00167 Details of optical fibre bundles, e.g. shape or fibre distribution
• CPC Class Codes: A61B 1/0607 for annular illumination
• CPC Class Codes: A61B 1/07 using light-conductive means, e.g. optical fibres
• CPC Class Codes: A61B 1/12 with cooling or rinsing arrangements
• CPC Class Codes: A61B 18/245 for removing obstructions in blood vessels or calculi
• CPC Class Codes: A61B 2090/3933 Liquid markers
• CPC Class Codes: A61M 1/772 operating alternately
• CPC Class Codes: B23K 26/03 Observing, e.g. monitoring, the workpiece
• CPC Class Codes: B23K 26/144 the fluid stream containing particles, e.g. powder
• CPC Class Codes: G02B 6/4296 coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources

Abstract

A device for use primarily in medical applications to locate, analyze, illuminate and destroy obstructions in a tube. The device includes a fiberoptics bundle for insertion to the tube in a flexible conduit. The conduit includes a connection to a suction source at one of its ends, a valved means of controlling the application of suction, which functions also to control the injection of locating material, and a connection to the fiberoptics bundle. The fiberoptics bundle is divided into an illuminating source bundle portion, a viewing bundle portion and a laser bundle portion. The device functions to remove obstructions in tube structures, both biological and non-biological, by insertion of the conduit sheathed device into the tube structure, distal to the obstruction. A dye, or the like, is injected and the site of the obstruction thereby determined under the guidance of image-intensified fluoroscopy. The conduit is moved toward the obstruction until resistance is felt, and the negative pressure source or suction applied to attach the conduit to the obstruction. The physical contact between the device and the obstruction, as well as the physical appearance of the obstruction, are determined by direct viewing. The obstruction is then vaporized by the laser beam with vaporized debris being constantly removed by the suction, and at the same time, the conduit is advanced by the suction, so that it is in continuous contact with the obstruction. A transparent reservoir is connected to the conduit so that upon complete tunnelling an indication thereof may be observed in the transparent reservoir.

Claims

1. A device for locating, viewing and removing an obstruction in a tube comprising, in combination:

an elongated sheath having distal and proximal ends;

a head defining a head opening at said distal end;

a fiberoptic bundle through a portion of said sheath, connected to said head and having a viewing bundle portion for use in viewing said obstruction, a laser bundle portion for use in removing said obstruction and a light source bundle portion usable with said viewing bundle portion for viewing said obstruction, said bundle portions terminating at said head opening and therewith defining a suction inlet;

said bundle and said sheath together defining an annular space therebetween;

a suction opening at said proximal end;

an indicating substance connection opening to said annular space intermediate said ends for use in locating said obstruction by conducting an indicating substance to said obstruction; and

, a transparent end of removal indicating reservoir proximate said proximal end.

2. The invention according to claim 1 wherein said device further includes a valve for controlling flow through said suction opening, said indicating substance connection and said annular space.