CA2663862A1 - Blood withdrawal system - Google Patents

Blood withdrawal system Download PDF

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Publication number
CA2663862A1
CA2663862A1 CA002663862A CA2663862A CA2663862A1 CA 2663862 A1 CA2663862 A1 CA 2663862A1 CA 002663862 A CA002663862 A CA 002663862A CA 2663862 A CA2663862 A CA 2663862A CA 2663862 A1 CA2663862 A1 CA 2663862A1
Authority
CA
Canada
Prior art keywords
lancet
housing
drive
ejection mechanism
drive spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002663862A
Other languages
French (fr)
Other versions
CA2663862C (en
Inventor
Bruno Robert Thoes
Michael Schabbach
Hans Kintzig
Peter Ruschke
Hans Kuhr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
F Hoffmann La Roche AG
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2663862A1 publication Critical patent/CA2663862A1/en
Application granted granted Critical
Publication of CA2663862C publication Critical patent/CA2663862C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150015—Source of blood
    • A61B5/150022—Source of blood for capillary blood or interstitial fluid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381—Design of piercing elements
    • A61B5/150412—Pointed piercing elements, e.g. needles, lancets for piercing the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101—Details
    • A61B5/15103—Piercing procedure
    • A61B5/15107—Piercing being assisted by a triggering mechanism
    • A61B5/15113—Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101—Details
    • A61B5/15115—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids
    • A61B5/15117—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101—Details
    • A61B5/15126—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides
    • A61B5/15128—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides comprising 2D- or 3D-shaped elements, e.g. cams, curved guide rails or threads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101—Details
    • A61B5/15126—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides
    • A61B5/1513—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides comprising linear sliding guides
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101—Details
    • A61B5/15126—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides
    • A61B5/15132—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides comprising tooth-shaped elements, e.g. toothed wheel or rack and pinion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15186—Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15186—Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
    • A61B5/15188—Constructional features of reusable driving devices
    • A61B5/1519—Constructional features of reusable driving devices comprising driving means, e.g. a spring, for propelling the piercing unit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15186—Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
    • A61B5/15188—Constructional features of reusable driving devices
    • A61B5/15192—Constructional features of reusable driving devices comprising driving means, e.g. a spring, for retracting the lancet unit into the driving device housing
    • A61B5/15194—Constructional features of reusable driving devices comprising driving means, e.g. a spring, for retracting the lancet unit into the driving device housing 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

Blood withdrawal system for withdrawing blood for diagnostic purposes, comprising a housing with a lancet, which can be moved within the housing, and a lancet drive with a drive spring and a cocking mechanism, wherein the cocking mechanism (13) includes an actuation element (14), which is coupled through an input-side coupling mechanism (29) to the drive spring (16) such that the drive spring (16) is tensioned during a cocking phase of the motion of the lancet drive (9) by moving the actuation element (14).

The actuation element of the cocking mechanism is coupled to a track control mechanism comprising as components of the track control mechanism a control track part (45) and a control traveller (46), wherein the control traveller (46) performs a relative motion with respect to the control track part (45) during at least a part of the cocking phase, in which motion it travels along the control track (47) of the control track part (45), whereby at least a part of the motion of the lancet drive is controlled.

Claims (15)

1. A blood withdrawal system for withdrawing blood for diagnostic purposes, the system comprising:

a housing wherein a lancet can be moved along a pre-determined puncturing path to perform a puncturing motion;

a lancet drive comprising a drive spring and a cocking mechanism, wherein the cocking mechanism includes an actuation element which is coupled by an input-side coupling mechanism to the drive spring, said input-side coupling mechanism being adapted to effect a transmission of force from the actuation element to the drive spring, such that the drive spring is tensioned when the actuation element is moved during a cocking phase of the motion of the lancet drive, and the drive spring is adapted to be coupled by an output-side coupling mechanism to a lancet such that said output-side coupling mechanism is adapted to effect a transmission of force from the drive spring to a lancet, such that the lancet can be driven by the relaxing motion of the drive spring and moved along a pre-determined puncturing path to perform a puncturing motion to generate a wound; and a lancet ejection mechanism for removing a used lancet from the housing, wherein the actuation element of the cocking mechanism of the lancet drive serves also as an actuation button for the lancet ejection mechanism, thereby performing the functions of tensioning the drive spring during the cocking phase and actuating the lancet ejection mechanism.
2. The system of claim 1 wherein the actuation element also is adapted to trigger the puncturing motion, such that the actuation element thereby performs the functions of tensioning the drive spring during the cocking phase, actuating the lancet ejection mechanism, and triggering the puncturing motion.
3. The system of claim 1 wherein the lancet ejection mechanism has an active position such that actuating the actuation button for the lancet ejection mechanism removes a used lancet from the housing and a passive position such that actuating the actuation button does not lead to the ejection of a used lancet from the housing.
4. The system of claim 3 wherein the lancet ejection mechanism includes a force transmission chain between the actuation button and the lancet, said force transmission chain being required for effecting an ejection of a lancet from the housing, wherein said force transmission chain is interrupted in the passive position of the lancet ejection mechanism.
5. The system of claim 4 wherein the force transmission chain further comprises a release element that can be switched between an active position and a passive position, corresponding to the active and passive positions, respectively, of the lancet ejection mechanism.
6. The system of claim 5 wherein the housing further comprises a front end, and a puncturing opening is formed by a cap which can be removed in order to remove used lancets, wherein the cap when attached to the front end of the housing interacts with the release element to maintain the release element in its passive position, and wherein the release element is switched to its active position upon removal of the cap.
7. The system of claim 2 wherein the lancet ejection mechanism has an active position such that actuating the actuation button for the lancet ejection mechanism removes a used lancet from the housing and a passive position such that actuating the actuation button does not lead to the ejection of a used lancet from the housing.
8. The system of claim 7 wherein the lancet ejection mechanism includes a force transmission chain between the actuation button and a lancet, said force transmission chain being required for effecting an ejection of a lancet from the housing, wherein said force transmission chain is interrupted in the passive position of the lancet ejection mechanism.
9. The system of claim 8 wherein the force transmission chain further comprises a release element that can be switched between an active position and a passive position, corresponding to the active and passive positions, respectively, of the lancet ejection mechanism.
10. The system of claim 9 wherein the housing further comprises a front end, and a puncturing opening is formed by a cap which can be removed in order to remove used lancets, wherein the cap when attached to the front end of the housing interacts with the release element to maintain the release element in its passive position, and wherein the release element is switched to its active position upon removal of the cap.
11. A blood withdrawal system for withdrawing blood for diagnostic purposes the system comprising:

a housing, wherein a lancet can be moved within the housing along a predetermined puncturing path to perform a puncturing motion;

a lancet drive with a drive spring and a cocking mechanism;

wherein the cocking mechanism includes an actuation element, which is coupled by an input-side coupling mechanism to the drive spring such that the drive spring is tensioned when the actuation element is moved during a cocking phase of the motion of the lancer drive;

wherein the drive spring is coupled by an output-side coupling mechanism to the lancet such that the lancet is, during a drive phase of the motion of the lancet drive driven by a relaxing motion of the drive spring, moved at high speed along the predetermined puncturing path to generate a wound; and a lancet ejection mechanism, wherein the lancet ejection mechanism, includes a release element which is borne in the housing such that it can be switched between a passive position and an active position, wherein when the release element is in its active position such that actuating an actuation button of the lancet ejection mechanism removes a used lancet from the housing;

wherein the front end of the housing is formed by a cap, which can be removed in order to remove used lancets, such that when the cap is attached, the cap interacts with the release element such that it is in its passive position, and wherein the release element is switched to its active position upon removal of the cap.
12. The system according to claim 11, wherein the release element is a part of a force transmission chain between the actuation button and a lancet, which three transmission chain is required for the ejection of the lancet.
13. The system according to claim 12, wherein the release element can be displaced in the same direction as the actuation button.
14. The system according to claim 12, wherein the three transmission chain is interrupted when the release element is in its passive position.
15. The system according to claim 11, wherein the actuation element of the cocking mechanism of the lancet drive is also the actuation button of the lancet ejection mechanism.
CA2663862A 2003-08-07 2004-07-26 Blood withdrawal system Expired - Fee Related CA2663862C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10336933A DE10336933B4 (en) 2003-08-07 2003-08-07 Blood Collection system
DE10336933.3 2003-08-07
CA2475705A CA2475705C (en) 2003-08-07 2004-07-26 Blood withdrawal system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA2475705A Division CA2475705C (en) 2003-08-07 2004-07-26 Blood withdrawal system

Publications (2)

Publication Number Publication Date
CA2663862A1 true CA2663862A1 (en) 2005-02-07
CA2663862C CA2663862C (en) 2012-04-03

Family

ID=33547189

Family Applications (2)

Application Number Title Priority Date Filing Date
CA2475705A Expired - Fee Related CA2475705C (en) 2003-08-07 2004-07-26 Blood withdrawal system
CA2663862A Expired - Fee Related CA2663862C (en) 2003-08-07 2004-07-26 Blood withdrawal system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA2475705A Expired - Fee Related CA2475705C (en) 2003-08-07 2004-07-26 Blood withdrawal system

Country Status (7)

Country Link
US (2) US7273484B2 (en)
EP (2) EP2606823B1 (en)
JP (2) JP3939319B2 (en)
CA (2) CA2475705C (en)
DE (1) DE10336933B4 (en)
ES (1) ES2429437T3 (en)
PL (1) PL1504718T3 (en)

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