Aspirator device

• US 3,920,001 A
• Filed: 06/10/1974
• Issued: 11/18/1975
• Est. Priority Date: 07/24/1970
• Status: Expired due to Term

• Current Assignee: Donald W. Edwards
• Original Assignee: Donald W. Edwards
• Inventors: Edwards, Donald W.
• Primary Examiner(s): Howell, Kyle L.
• Application Number:
  US05/477,847
• Time in Patent Office: 526 Days
• Field of Search: 128/2F,DIG.5,221,218N,214R,214.2,214.4,215,276,DIG.25,2
• US Class Current: 600/578
• CPC Class Codes: A61B 10/0283 with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe A61B10/025, A61B10/0266 take precedence
• CPC Class Codes: A61B 17/3403 Needle locating or guiding means guides for suture needles A61B17/0482; guiding or tracking by nuclear magnetic resonance G01R33/285
• CPC Class Codes: A61B 2017/00907 for light
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150175 Adjustment of penetration depth
• CPC Class Codes: A61B 5/150236 Pistons, i.e. cylindrical bodies that sit inside the syringe barrel, typically with an air tight seal, and slide in the barrel to create a vacuum or to expel blood
• CPC Class Codes: A61B 5/150244 Rods for actuating or driving the piston, i.e. the cylindrical body that sits inside the syringe barrel, typically with an air tight seal, and slides in the barrel to create a vacuum or to expel blood
• CPC Class Codes: A61B 5/150259 Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150396 Specific tip design, e.g. for improved penetration characteristics
• CPC Class Codes: A61B 5/150511 Details of construction of shaft
• CPC Class Codes: A61B 5/150519 Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device
• CPC Class Codes: A61B 5/150732 Needle holders, for instance for holding the needle by the hub, used for example with double-ended needle and pre-evacuated tube,
• CPC Class Codes: A61B 5/150748 Having means for aiding positioning of the piercing device at a location where the body is to be pierced means for aiding positioning of devices for bringing media into the body A61M5/427, locating blood vessels A61B5/489
• CPC Class Codes: A61B 5/153 Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
• CPC Class Codes: A61M 2005/1585 Needle inserters
• CPC Class Codes: A61M 2205/197 by the seal material
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/31 Details
• CPC Class Codes: A61M 5/32 Needles; Details of needles pertaining to their connection with syringe or hub infusion needles A61M5/158; Accessories for bringing the needle into, or holding the needle on, the body A61M5/42, A61M5/46 take precedence; guide needles for catheters A61M25/065; Devices for protection of needles apparatus specially adapted for cleaning or sterilising needles A61M5/001
• CPC Class Codes: A61M 5/3287 : Accessories for bringing the needle into the body; Automatic needle insertion A61M5/20, A61M5/31525 take precedence
• CPC Class Codes: A61M 5/329 : characterised by features of the needle shaft
• CPC Class Codes: A61M 5/3291 : Shafts with additional lateral openings

Abstract

The cannula is provided with a hub for mounting on a syringe. Adjacent the point of the cannula is a lateral opening which intersects the end opening. A slidable sleeve is provided for sealing to the cannula outwardly of the lateral opening during insertion of the cannula and, in some instances, during taking of the blood sample. An outwardly-extending disk is arranged at an oblique angle to the sleeve to seal against the skin of a patient.

Claims

1. An aspirator device for taking a blood sample and which alleviates the necessity of accurate positioning, the device including:

means defining a reservoir for receiving blood from a patient;

means for applying a partial vacuum on the reservoir to draw blood from the patient;

a cannula having a size in the range of 25 guage to 16 guage;

the cannula having a penetrating point at its distal end and a hub at its proximal end operatively connected to the reservoir;

the cannula having an opening at its distal end communicating with its lumen, and an axially elongate lateral opening through the cannula wall on the side opposite the penetrating point;

the lateral opening intersecting the end opening and extending along the cannula to a remote end a distance from the distal end in the range of 10 to 40 times the diameter of the lumen of the cannula;

the lateral opening having a width less than 180*;

the cannula having a smooth exterior surface of uniform diameter extending the full length thereof, with no obstructions thereon;

a slidable sealing sleeve having a length greater than the distance from the distal end to the remote end of the lateral opening;

the cannula having a length greater than twice the length of the sleeve;

the cannula slidably extending through the sleeve from a first position where the penetrating point is inside the sleeve and the lateral opening is covered by the sleeve, to a position contiguous to the hub;

the sleeve closely surrounding the cannula and arranged to provide an air-tight seal against the cannula at said first position to provide an air-tight cover extending over the lateral opening both prior to and during insertion of the cannula into the patient;

means at the end of the sleeve adjacent the penetrating point for sealing against the skin of the patient;

the lastmentioned means including an outwardly-extending base at an oblique angle to the axis of the sleeve and providing a flat, skin-engaging surface;

the base being formed from a transparent synthetic resin and extending outwardly from the cannula about 3/8 inch in each direction.

2. An aspirator device as set forth in claim 1 including an adhesive on the skin-engaging surface of the base for sealing against the skin of the patient.

3. An aspirator device as set forth in claim 2 wherein the remote end of the lateral opening is about 1/2 inch from the distal end of the cannula, the sleeve has a length of about 3/4 inch, and the cannula has a length of about 2 inches.