Lancing Aid Having Automatic Triggering

• US 20130085517A1
• Filed: 10/30/2012
• Published: 04/04/2013
• Est. Priority Date: 04/30/2010
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics Operations Incorporated (Roche Holding AG)
• Inventors: Keil, Michael
• Granted Patent: US 10,779,759 B2
• 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 5/150412 Pointed piercing elements, e.g. needles, lancets for piercing the skin blade-like piercing elements A61B5/150442
• 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 5/15111 Semi-automatically triggered, e.g. at the end of the cocking procedure, for instance by biasing the main drive spring or when reaching sufficient contact pressure, the piercing device is automatically triggered without any deliberate action by the user
• 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 5/15128 comprising 2D- or 3D-shaped elements, e.g. cams, curved guide rails or threads comprising tooth-shaped elements A61B5/15132
• CPC Class Codes: A61B 5/15146 Devices loaded with multiple lancets simultaneously, e.g. for serial firing without reloading, for example by use of stocking means. multiple simultaneous cutting or piercing A61B5/150977
• CPC Class Codes: A61B 5/15163 Characterized by propelling the piercing element in an axial direction relative to the disc

Abstract

The present application concerns a system for the withdrawal of body fluids comprising a coupled tensioning and triggering mechanism, wherein the triggering mechanism is mechanically coupled to the tensioning mechanism in such a manner that the puncturing process is automatically triggered by successive continuation of the tensioning movement when the tensioning mechanism is actuated and wherein the lancing process triggered in this manner is carried out by a lancet.

Claims

1. A system for withdrawing body fluids, the system comprising:

a withdrawal device;

at least one lancet having a lancet body, a lancet tip, and a sterile protection which ensures the sterility of the unused lancets prior use in a punture, the sterile protection consisting of an elastomeric material which during the puncture is pierced or stripped of by the lancet tip;

a housing with an exit opening for the lancet tip, the housing at least partially enclosing the withdrawal device;

a lancet holder which can be moved in the housing along a predetermined puncture path to replaceably hold the at least one lancet;

a magazine containing the at least one lancet, wherein the at least one lancet can be successively coupled to the lancet holder;

a lancet drive with an elastic drive element which can be converted by tensioning from an untensioned into a tensioned state and by means of which after the triggering, the relaxing movement of the tensioned elastic drive element is converted into a lancing movement in the course of which the lancet held by the lancet holder is moved in a puncturing direction along the predetermined puncture path until the lancet tip emerges at least partially from the exit opening and by means of which the lancet holder is returned by the lancet drive into a position in which the tip of the lancet is located in the housing;

a lancet guide structured to guide the lancet holder on the predetermined puncture path after the lancing movement is triggered; and

a combined tensioning and triggering device having an actuating element and a locking device, the actuating element having an initial state and an actuated state and being accessible from the outside of the housing, the locking device being mechanically coupled to the actuating element and the lancet drive in such a manner that the lancet drive is firstly tensioned and then released when the actuating element is moved along the actuation path where the release of the lancet drive is enabled when a certain point along the actuation path is reached, wherein the housing at least partially encloses the combined tensioning and triggering device.

2. The system of claim 1, wherein the locking device is designed as a track control which comprises a control track part and a control cam as members wherein the control cam makes a relative movement with respect to the control track part during at least a part of the movement of the actuating element along the actuation path, in which it travels along at least part of the control track part of the track control.

3. The system of claim 1, wherein the lancet drive has a rotary/sliding transmission comprising a rotatable drive rotor by means of which a turning moment introduced on the input-side of the rotary/sliding transmission is converted into a longitudinal displacement in the direction of a predetermined puncture path, wherein the drive rotor is coupled to the elastic drive element and longitudinal displacement of the rotary/sliding transmission on the output side is transferred onto the lancet holder.

4. The system of claim 2, wherein the control track part of the track control is mounted at least partially on the drive rotor.

5. The system of claim 2, wherein the control track part comprises a first and a second section, wherein the first section of the control track part runs essentially parallel to the axis of rotation of the rotary sliding transmission and wherein the second section of the control track part runs essentially perpendicular to the axis of rotation of the rotary/sliding transmission.

6. The system of claim 1, wherein the elastic drive element of the lancet drive is converted by continuous unidirectional displacement of the actuating element firstly from an untensioned into a tensioned state and is subsequently triggered.

7. The system of claim 1, wherein the actuating element is an operating button protruding out of the rear end of the housing facing away from the exit opening for the lancet tip.

8. The system of claim 3, wherein the rotary/sliding transmission has a cam control comprising a recess forming a guide curve that can be rotated together with the drive rotor into which a matching guide pin engages where at least a part of the puncturing and return movement is determined by a relative movement between the guide pin and the recess which the guide pin makes when it travels through the guide curve formed by the recess.

9. The system of claim 3, wherein the input-side of the rotary/sliding transmission is formed by a helix provided on the rotatable transmission member and by a tensioning cam connected to the actuating element that can move along the actuation path and can slide on a slide surface of the helix by means of a contact surface.

10. The system of claim 1, wherein the magazine comprises at least part of the lancet guide.

11. The system of claim 1, wherein the lancet is mechanically coupled to the lancet drive during the entire puncture process.

12. The system of claim 1, further comprises an indicating element for indicating the imminent triggering of the puncture movement.

13. The system of claim 12, wherein the indicating element for indicating the imminent triggering of the puncture movement are part of the actuating element.

14. The system of claim 1, wherein the magazine is removably coupled to the housing.