Damping System for a Lancet Using Compressed Air

• US 20080097503A1
• Filed: 09/08/2005
• Published: 04/24/2008
• Est. Priority Date: 09/09/2004
• Status: Abandoned Application

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Creaven, John
• Application Number:
  US11/660,835
• Publication Number:
  US 20080097503A1
• Time in Patent Office: Days
• US Class Current: 606/182
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150213 Venting means
• CPC Class Codes: A61B 5/150221 Valves
• 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 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• 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 5/1519 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

Abstract

A lancing device comprises a cylinder, a plunger, a piston, a spring and an actuator. The cylinder includes a valve that is adapted to allow air to flow into the cylinder. The cylinder further forms an aperture. The plunger housing is adapted to seat a lancet therein. The piston is adapted to move within the cylinder. The piston is adapted to inhibit most of the air located within the cylinder from escaping between the cylinder and piston. The piston is attached to the plunger housing. The spring is located within the cylinder. The spring is located adjacent the piston opposite from the plunger housing. The actuator includes an inner shaft in which the inner shaft of the actuator extends into the cylinder through the aperture formed in the cylinder. The inner shaft is attached to the piston opposite from the plunger housing.

Claims

1. A lancing device comprising:

a cylinder including a valve, the valve being adapted to allow air to flow into the cylinder, the cylinder further forming an aperture;

a plunger housing adapted to seat a lancet therein;

a piston adapted to move within the cylinder, the piston being adapted to inhibit most of the air located within the cylinder from escaping between the cylinder and piston, the piston being attached to the plunger housing;

a spring located within the cylinder, the spring being located adjacent the piston opposite from the plunger housing; and

an actuator including an inner shaft, wherein the inner shaft of the actuator extends into the cylinder through the aperture formed in the cylinder, the inner shaft being attached to the piston opposite from the plunger housing.

2. The lancing device according to claim 1, wherein the cylinder includes an extension that extends therefrom, the one-way-intake valve being located within a portion of the extension.

3. The lancing device according to claim 1, the lancing device further comprising a lancet adapted to pierce the skin of a test subject.

5. The lancing device according to claim 1, wherein the cylinder further includes at least one cylinder port, the at least one cylinder port being adapted to allow air to flow into and out-from the cylinder.

6. The lancing device according to claim 5, wherein the cylinder further includes a second cylinder port, the second cylinder port being adapted to allow air to flow into and out-from the cylinder.

7. The lancing device according to claim 6, wherein the at least one cylinder port and the second cylinder port are located approximately opposite each other with respect to the cylinder.

8. The lancing device according to claim 1 wherein the actuator is adapted to compress the spring when a force is applied in a direction opposite the spring.

4. The lancing device according to embodiment A, wherein the valve is a one-way valve.

9. A method for using a lancing device, the method comprising the acts of:

providing a lancet device including,

(i) a cylinder including a valve, the valve being adapted to allow air to flow into the cylinder, the cylinder further forming an aperture,

(ii) a plunger housing adapted to seat a lancet therein,

(iii) a piston adapted to move within the cylinder, the piston being attached to the plunger housing,

(iv) a spring located within the cylinder, the spring being located adjacent the piston opposite from the plunger housing, the spring being adapted to move the piston in a first direction and a second direction, the spring having at least a resting position, a ready position, and an extended position, the ready position being between the ready position and the extended position, and

(v) an actuator including an inner shaft, wherein the inner shaft of the actuator extends into the cylinder through the aperture formed in the cylinder, the inner shaft being attached to the piston opposite from the plunger housing;

compressing the spring from the resting position into the ready position;

releasing the spring, the release allowing the spring to expand, the expanding spring imparting a firing force on the piston in the first direction until reaching the extended position of the spring, wherein the spring imparts a return force on the piston in the second direction until reaching the resting position of the spring;

forming a vacuum within the cylinder as the piston moves in the first direction;

allowing air to enter the cylinder through the valve and relieve the vacuum formed within the cylinder as the piston moves in the first direction;

inhibiting the air from escaping the cylinder as the spring returns to its resting position and the piston moves in the second direction;

compressing the air within the cylinder to slow the piston'"'"'s movement in the second direction.

10. The method according to claim 9, wherein the plunger housing includes a lancet.

11. The method according to claim 10, further comprising the act of piercing a skin of a test subject with the lancet prior to compressing the air within the cylinder.

12. The method according to claim 9, wherein the cylinder is provided with at least one cylinder port, the cylinder port being adapted to allow air to enter the cylinder prior to compressing the air within the cylinder.

13. The method according to claim 9, further comprising inhibiting the side-to-side movement of the piston with the cylinder.