Vacuum curet

• US 3,955,579 A
• Filed: 07/23/1973
• Issued: 05/11/1976
• Est. Priority Date: 07/23/1973
• Status: Expired due to Term

• Current Assignee: Warner-Lambert Company (Pfizer Inc.)
• Original Assignee: Henry Bridgman
• Inventors: Bridgman, Henry
• Primary Examiner(s): Pace, Channing L.
• Application Number:
  US05/381,740
• Time in Patent Office: 1,023 Days
• Field of Search: 128/276, 128/304
• US Class Current: 604/128
• CPC Class Codes: A61B 10/04 Endoscopic instruments
• CPC Class Codes: A61B 17/320708 Curettes, e.g. hollow scraping instruments
• CPC Class Codes: A61M 1/84 Drainage tubes; Aspiration tips for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32

Abstract

A vacuum curet of novel design having a central portion which is tapered and an internal lumen which is preferably also tapered. This provides a curet which is rigid over its central and proximal end (i.e. the end that fits into a vacuum source) and maximal flexibility and small external diameter at its distal end portion. Further advantages of this arrangement are reducing the possibility of perforation (due to the flexibility of the distal end portion), better "feel" (due to the rigidity of the central and proximal end portion), and decreased trauma due to the thin wall thickness of the proximal end portion and a corresponding reduction in outside diameter for a given or required lumen diameter. The lumen of this design may also be mass produced. In an additional embodiment, there is a novel design on the tip openings at the distal end, which further minimizes the possibility of perforation.

Claims

1. A vacuum curet comprising

a tube of flexible material having a central lumen extending therethrough, a distal end portion adopted to be inserted into a body cavity, a proximal end portion adopted to be connected to a vacuum source, and an intermediate tapered shank;

said distal end portion having a narrow predetermined, outside diameter; and

means for curetting at its tip region; and

means for providing greater rigidity in said tapered shank than in said distal end portion.

2. A curet according to claim 1, comprising at least a pair of openings at said distal end portion tip region in opposed relationship.

3. A curet according to claim 1, wherein said curetting means is a macerator.

4. A curet according to claim 1, wherein said curetting means includes a rounded opening.

5. A curet according to claim 2, wherein said curetting means includes a pair of tip openings one of which is a macerator, and the other is rounded;

said macerator being closer to the end of said curet than said rounded tip openings.

6. A curet according to claim 1, wherein said greater rigidity is provided by a lumen substantially of a constant diameter and said tapered shank having an outside diameter increasing in size from said distal end portion to said proximal end portion.

7. A curet according to claim 1, wherein said lumen has a diameter which increases between the proximal and distal end portions.

8. A curet according to claim 7, wherein said lumen diameter also increases from said distal end region tip to said tapered shank.

9. A curet according to claim 1, wherein the greater rigidity is provided by the thickness of the wall in the tapered shank area which increases from the distal end portion to the proximal end portion.

10. A curet according to claim 1 wherein said distal end portion is closed at its tip end (22) and said flexible material is a single piece of molded plastic.