Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

Obesity Surgery

Ovoid-atherectomy-cutter

Method and apparatus for removing corneal tissue

I claim: 1. A method of attaching a corneal onlay to the cornea comprising: abrading a region of B...

Powder-actuated tool

The tool shown in the drawings is generally the same as the tool shown and described in the above ...

Apparatus for incremental movement of die frame

I claim: 1. Apparatus for incrementally advancing a die support frame having a plurality of ...

Suture clip

What is claimed is: 1. A one-piece suture clip for holding the edges of a wound proximate to one ...

Methods and apparatus for disintegration of urinary calculi under direct vision

We claim: 1. An apparatus for machining and fragmenting urinary calculi in place in a ureter ...

Method of reducing the amount of cadmium capable of being extracted from calcined cadmium pigment powder by human gastric juices

What is claimed is: 1. A method of reducing the amount of cadmium capable of being extracted form a ...

Method and apparatus for the shock pressure shaping

What we claim is: 1. An apparatus for impact shaping of workpieces comprising: high pressure ...

Undulating rectal flushing apparatus

This invention is a portable irrigation apparatus for the colon and intestines with the patient ...

Identification tag and insertion tool for cattle

OF THE PREFERRED EMBODIMENT Referring first to FIG. 1, the identification tag is in the form of a ...

Cold weather hood for safety hat

Referring to the drawings, FIG. 1 illustrates a hard hat 10 and a knitted tubular hood 11. The hat ...

Ovoid atherectomy cutter

Details

Inventors: Farr, Andrew F.;
Assignee: Interventional Technologies Inc. (San Diego, CA)
Primary Examiner: Thaler; Michael H.
Assistant Examiner:
Attorney, Agent or Firm: Nydegger & Associates

A rotatable atherectomy cutter for removing obstructive tissue from a body vessel includes a hollow cylindrical base having an outer wall, a hollow cylindrical guide tip coaxially distanced from the base for slidably receiving a guide wire and a pair of dismetrically opposed blades each having a distal end and a proximal end. The distal end of each blade is connected to the guide tip and the proximal end connected to the base for alternately cutting the tissue with a first cutting edge and a second cutting edge longer than the first cutting edge. The proximal end of each blade is connected to an ovoid portion formed in the base for allowing the second cutting edge of the blade to extend beyond the outer diameter of the cylindrical base to cut a diameter of tissue larger than the diameter of the base. The base includes a straight wall portion connecting the pair of blades to establish the first cutting edge on each of the blades. The blades are inclined to the longitudinal axis of the cutter at an angle in the range of between thirty 30) and seventy (70) degrees and are preferably made of stainless steel. Also included is a mechanism for removing debris through an opening in the top of the base. The ovoid portion extends the second cutting edge of the blades beyond the outer wall a distance of approximately five (5) to ten 10) percent of the diameter of the base.

DETAILED DESCRIPTION What is claimed is: 1.
A rotatable atherectomy cutter for removing obstructive tissue from a body vessel, comprising: a hollow cylindrical base having an outer wall; a hollow cylindrical guide tip coaxially distanced from said base having a diameter less than the diameter of said base; a pair of narrow diametrically opposed blades, each having a distal end and a proximal end, each said proximal end being connected to said base and each said distal end being connected to said tip, each blade establishing a first cutting edge and a second cutting edge, each said second cutting edge being longer than each said first cutting edge; and an ovoid portion attached to said base and located at said proximal end of each said blades for connecting each of said blades to said base for allowing said second cutting edge to extend beyond the maximum diameter of said outer wall of said base.
2.
A rotatably atherectomy cutter as recited in claim 1, wherein said first cutting edge does not extend beyond said outer wall.
3.
A rotatable atherectomy cutter as recited in claim 1, wherein said second cutting edge extends beyond said outer wall by an amount equivalent to between five to ten percent of the diameter of said cylindrical base.
4.
A rotatable atherectomy cutter as recited in claim 1, wherein said pair of blades are inclined to the longitudinal axis of said cutter at an angle in the range of between thirty and seventy degrees.
5.
A rotatable atherectomy cutter as recited in claim 4, wherein said cutter is made of stainless steel.
6.
A rotatable atherectomy cutter as recited in claim 1, further comprising a guide were insertable through said base and said tip for guiding said cutter along said wire through said vessel.
7.
A rotatable atherectomy cutter as recited in claim 1, further comprising means coupled to said base for rotating said cutter, and suction means for removing debris through said hollow base.
8.
A rotatable anterectomy cutter as recited in claim 1, wherein said first cutting edges of said blades each face in a first direction, and wherein said second cutting edges of said blades each face in a second direction opposite said first direction

Related patents

	Tissue-retrieving means for a surgical snare instrument Important objects of the present invention include the provision of tissue-retrieving means for a surgical open-snare instrument, which means will insure that severed ...
	Photometer I claim: 1. A photometer arrangement comprising a photodiode for supplying a voltage proportional to the logarithm of the light intensity, an oscillator the frequency of ...
	Surgical knife assembly including depth guard It is an object of the invention to provide a surgical knife assembly which includes a guide for limiting the depth of an incision. It is another object of the invention ...
	Device for determination of layer thickness, or alternatively, measurement of surface topography What is claimed is: 1. A unitary measuring device adapted to be placed in firm engagement with a surface for measuring a dimensional characteristic of said surface, said ...
	Surgical microscope system The foregoing and other objects of the invention are accomplished by providing a new and improved microscope system having means for projecting on to the cornea an image,...
	Hygienic attachments for therapy lasers OF THE INVENTION In FIG. 1, numeral 1 indicates a moulded plastic half-section of a direct beam laser therapy unit head, numeral 2 indicates a laser tube, functioning ...
	Process and apparatus for automatically cutting out work pieces in accordance with a pattern We claim: 1. A process for controlling a cutting device which is automatically traversed by a drive mechanism controlled by a photoelectric scanning apparatus to cut a ...
	Apparatus and process for application and adjustable reprofiling of synthetic lenticules for vision correction It is, therefore, one of the principal objects of the present invention to provide an apparatus and process for application of a synthetic lenticule for effecting ...
	Lens measuring method and apparatus These and other disadvantages of the prior art are overcome with the present invention which utilizes the electrically conductive properties of certain lens to indicate ...
	Keratoprosthesis The present invention overcomes the drawbacks of the prior art by providing a keratoprosthesis which, when implanted, becomes an integral part of the eye, is adequately ...

0.054
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved