PERCUSSION APPARATUS FOR BLOOD SAMPLING

• US 3,741,197 A
• Filed: 09/03/1971
• Issued: 06/26/1973
• Est. Priority Date: 09/04/1970
• Status: Expired due to Term

• Current Assignee: ICN Micromedic Systems Incorporated
• Original Assignee: Georges Revillet, Manuel C. Sanz
• Inventors: Sanz, Manuel C., Revillet, Georges
• Primary Examiner(s): Howell, Kyle L.
• Application Number:
  US05/181,423
• Time in Patent Office: 662 Days
• Field of Search: 128/2F,2R,2G,2B,DIG.5,275,276,314,315,253,295
• US Class Current: 600/583
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150068 by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
• CPC Class Codes: A61B 5/150213 Venting means
• CPC Class Codes: A61B 5/150267 Modular design or construction, i.e. subunits are assembled separately before being joined together or the device comprises interchangeable or detachable modules
• CPC Class Codes: A61B 5/150343 Collection vessels for collecting blood samples from the skin surface, e.g. test tubes, cuvettes sampling from within body cavities A61B5/150015, A61B5/150045
• CPC Class Codes: A61B 5/150412 Pointed piercing elements, e.g. needles, lancets for piercing the skin blade-like piercing elements A61B5/150442
• 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 5/150793 Electrical or magnetic identification means
• CPC Class Codes: A61B 5/15113 Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
• CPC Class Codes: A61B 5/15117 comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
• CPC Class Codes: A61B 5/1513 comprising linear sliding guides comprising tooth-shaped elements A61B5/15132
• CPC Class Codes: A61B 5/1519 comprising driving means, e.g. a spring, for propelling the piercing unit
• CPC Class Codes: A61B 5/15194 fully automatically retracted, i.e. the retraction does not require a deliberate action by the user, e.g. by terminating the contact with the patient's skin
• CPC Class Codes: Y10S 128/15 Hook and loop type fastener
• CPC Class Codes: Y10S 128/26 Cannula supporters

Abstract

An apparatus for taking blood samples which involves strapping a blood collector tube to the part of the body from which the sample is to be taken. The blood collector tube has a resilient collapsible funnel which, when compressed, allows a lancet to puncture the dermis and epidermis. A striker member is placed on the end of the tube and a piston, normally held in a spring compressing position by a latch is released thus allowing the spring to impact on the base of the tube, compressing the funnel member and allowing the lancet to puncture the skin.

Claims

1. A device for collecting a percutaneous digital blood sample from infants and the like comprising the combination of a tubular body closed at one end and open at the other end and adapted to collect the blood, a funnel member having a resilient funnel portion and a discharge end and engaged at said discharge end in the open end of said body and a mass of absorbent material located within said funnel portion, and at least one incisor lancet in said funnel portion projecting through and beyond said mass and located wholly within said funnel member, said funnel member providing an open passage from said funnel portion to the interior of said tubular body to allow for blood flow, flexible strap means connected to said tubular body below said funnel member for securing the funnel portion to a human body, and elongated striker means receiving the closed end of said tubular body and coaxial therewith, said striker means including a biased striker member and a means to release said member to allow it to impart a longitudinal force to the closed end of said tubular body to obtain a blood sample.

2. A device according to claim 1, and including a capillary tube forming an extension of said funnel member and said passage and extending to a location adjacent to the closed end of the tubular body.

3. A device according to claim 2, wherein one end of the capillary tube is located within the discharge end of the funnel member, and is integral with said lancet.

4. A device according to claim 1 and including a base plate supported in a lower part of said funnel portion, said lancet being integral with said base plate.

5. A device according to claim 1, including means for allowing entrapped air to vent from said tubular body comprising a passage located in the discharge end of said funnel.

6. A device according to claim 1 where said striker means includes a tubular aperture receiving the closed end of said tubular body, said striker member comprising a striker piston rod, spring means normally biasing said striker piston in a predetermined position, latch means for maintaining said piston in a second position which compresses at least a portion of said spring means, said latch means adapted to be released by a user to allow said compressed spring means to impart a velocity to said piston to effect an impact with the closed end of said tubular body to collapse said funnel portion and allow said lancet to penetrate into a human body.

7. A device according to claim 6 wherein said spring means comprises two opposed compression springs, said springs acting to maintain said piston in said predetermined position, one spring being weaker than the other which is compressed when said striker piston is withdrawn to allow the velocity imparted by said compressed spring to said piston to overcome said weaker spring thus allowing said piston to impact the closed end of said tubular body.

8. A device as in claim 1 wherein said tubular body has a magnetizable layer on the body surface thereof.