Single-hand controlled aspiration device

• US 4,664,128 A
• Filed: 10/21/1985
• Issued: 05/12/1987
• Est. Priority Date: 12/16/1983
• Status: Expired due to Fees

• Current Assignee: Peter F Lee Incorporated
• Original Assignee: Peter F Lee Incorporated
• Inventors: Lee, Peter F.
• Primary Examiner(s): Howell, Kyle L.
• Assistant Examiner(s): Citrin, Randy
• Application Number:
  US06/789,487
• Time in Patent Office: 568 Days
• Field of Search: 128/762-765, 128/753, 604/218, 604/227, 604/187
• US Class Current: 600/566
• CPC Class Codes: A61B 10/025 for taking bone, bone marrow or cartilage samples
• CPC Class Codes: A61B 2010/0258 Marrow samples
• CPC Class Codes: A61B 2017/0023 disposable
• CPC Class Codes: A61B 2217/005 with suction drainage system

Abstract

A disposable, single-hand controlled aspirating device for medical aspirating activities such as subcutaneous biopsy of fluid, soft tissue and bone marrow is provided. The aspirating device includes a syringe barrel, a plunger operative in the barrel, a finger grip member surrounding the exterior wall of the barrel that includes a collar portion engaging the exterior wall of the barrel and flange portions extending outwardly from the exterior wall of the barrel a distance sufficient to provide support for a user'"'"'s fingers during aspiration procedures, and a spring surrounding the plunger portion external to the barrel for biasing the plunger outwardly from the barrel after the plunger has been advanced in the barrel toward the distal end thereof.

Claims

1. An aspirating device, comprising:

a syringe barrel having an exterior wall, an interior wall, a distal end and a a proximal end, said walls and said ends defining a hollow interior space having a predetermined volume, said distal end having an opening and a hub, said distal end opening extending through said hub, said proximal end terminating at an outwardly projecting rim;

a finger grip member surrounding said exterior wall of said barrel and positioned along said barrel substantially adjacent said proximal end thereof, said finger grip member including a collar portion having an interior surface engaging said exterior wall of said barrel and a pair of flange portions extending outwardly from said collar portion, each of said flanges extending outwardly from said exterior wall of said barrel a distance sufficient to provide support for at least one finger of a user and having a substantially flat surface terminating at a rounded end tip, said finger grip member being slidable along said barrel and said interior surface of said collar frictionally engaging said exterior wall of said barrel substantially adjacent said outwardly projecting rim of said proxiaml rim of said proximal end of said barrel, whereby said frictional engagement is such that it compresses said barrel wall to allow selective placement and retention of said finger grip member along said barrel;

a plunger operative in said barrel, said plunger extending both within said barrel interior space and external to said barrel proximal end and having a first end sealingly received inside said barrel and a second end outside said barrel, said plunger being movable within said barrel interior space inwardly toward said distal end and outwardly away from said distal end, thereby varying the volume of and pressure within said barrel interior space, said plunger including a pressure plate at said second end; and

spring means surrounding said plunger portion external to said barrel and extending along said plunger between said pressure plate and said barrel proximal end, said spring means biasing said plunger outwardly from said barrel after said plunger has been advanced in said barrel toward said distal end thereof.

2. An aspirating device in accordance with claim 1 wherein said spring means is a coil spring.

3. An aspirating device in accordance with claim 1 wherein said finger grip member is plastic.

4. An aspirating device in accordance with claim 1 wherein said pressure plate is rounded.

5. An aspirating device in accordance with claim 1 further comprising a hollow needle having a first end opening into said barrel at said barrel'"'"'s distal end and a second end extending outwardly from said barrel distal end, said needle being sealingly engaged to said distal end of said barrel at said hub thereby allowing fluid communication between said needle and said barrel.

6. An aspirating device in accordance with claim 1 wherein said finger grip member includes a plurality of ribs on said interior surface of said collar, said ribs running along the longitudinal axis of said collar.

7. A disposable aspirating device, comprising:

a plastic syringe barrel having an exterior wall, an interior wall, a distal end and a proximal end, said walls and said ends defining a hollow interior space having a predetermined volume, said distal end having an opening and a hub, said distal end opening extending through said hub, said proximal end terminating at an outwardly projecting rim;

a plastic finger grip member surrounding said exterior wall of said barrel and positioned along said barrel substantially adjacent said proximal end thereof, said finger grip member including a collar having an interior surface engaging said exterior wall of said barrel and a pair of flange portions extending outwardly from said collar portion, each of said flanges extending outwardly from said exterior wall of said barrel a distance sufficient to provide support for at least one finger of a user and having a substantially flat surface terminating at a rounded end tip, said interior surface of said collar slidably and frictionally engaging said exterior wall of said barrel substantially adjacent outwardly projecting rim of said proximal end of said barrel, whereby said frictional engagement is such that it compresses said barrel wall to allow selective placement and retention of said finger grip member along said barrel;

a plastic plunger operative in said barrel, said plunger extending both within said barrel interior space and external to said barrel proximal end and having a first end sealingly received inside said barrel and a second end outside said barrel, said plunger being movable within said barrel interior space inwardly toward said distal end and outwardly away from said distal end, thereby varying the volume of and pressure within said barrel interior space, said plunger including a pressure plate at said second end; and

a spring surrounding said plunger portion external to said barrel, said spring extending along said plunger between said pressure plate and said barrel proximal end, said spring biasing said plunger outwardly from said barrel after said plunger has been advanced in said barrel toward the distal end thereof.

8. An aspirating device in accordance with claim 7 wherein said finger grip member includes a plurality of ribs on said interior surface of said collar, said ribs running along the longitudinal axis of said collar.