CA2475705A1 - Blood withdrawal system - Google Patents

Blood withdrawal system Download PDF

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Publication number
CA2475705A1
CA2475705A1 CA002475705A CA2475705A CA2475705A1 CA 2475705 A1 CA2475705 A1 CA 2475705A1 CA 002475705 A CA002475705 A CA 002475705A CA 2475705 A CA2475705 A CA 2475705A CA 2475705 A1 CA2475705 A1 CA 2475705A1
Authority
CA
Canada
Prior art keywords
drive
lancet
motion
control
withdrawal system
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
CA002475705A
Other languages
French (fr)
Other versions
CA2475705C (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
F Hoffmann La Roche AG
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 F Hoffmann La Roche AG filed Critical F Hoffmann La Roche AG
Priority to CA2663862A priority Critical patent/CA2663862C/en
Publication of CA2475705A1 publication Critical patent/CA2475705A1/en
Application granted granted Critical
Publication of CA2475705C publication Critical patent/CA2475705C/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 (18)

1. Blood withdrawal system for withdrawing blood for diagnostic purposes, comprising a housing (8) with an exit opening (11) for the tip of a lancet (3), which can be moved within the housing (8) along a pre-determined puncturing path, and a lancet drive (9) with a drive spring (16) and a cocking mechanism (13), wherein - the cocking mechanism (13) includes an actuation element (14), which is coupled by an input-side coupling mechanism (29) to the drive spring (16) such that the drive spring (16) is tensioned when the actuation element (14) is moved during a cocking phase of the motion of the lancet drive (9), and - the drive spring (16) is coupled by an output-side coupling mechanism (30) to the lancet (3) such that the lancet (3) is, during a drive phase of the motion of the lancet drive (9), driven by the relaxing motion of the drive spring, moved at high speed along the pre-determined puncturing path in the puncturing direction (10) until its tip (6) exits from the exit opening (11) to generate a wound, characterized in that the actuation element (14) of the cocking mechanism (13) is coupled to a track control mechanism (40) comprising as components of the track control mechanism (40) a control track part (45) and a control traveller (46), the control traveller (46) performing 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) and whereby at least a part of the motion of the lancet drive (9) is controlled.
2. Blood withdrawal system according to claim 1, characterized in that the control track part (45) is the input-side component of the track control mechanism (40) coupled with the actuation element (14) of the cocking mechanism (13).
3. Blood withdrawal system according to any one of the claims 1 or 2, characterized in that the housing (8) has an elongated shape and the control track part (45) or the control traveller (46) is movably guided in the housing (8) parallel to its longitudinal axis (A).
4. Blood withdrawal system according to claim 3, characterized in that the actuation element (14) of the cocking mechanism (13) includes a cocking button projecting from the rear end of the housing (8) opposite from the exit opening (11) of the lancet tip.
5. Blood withdrawal system according to any one of the preceding claims, characterized in that the control track of the control track part (45) includes a one-way section (53) which is designed and arranged in such a manner that the control traveller (46), once it is driven into the one-way section (53), can be driven out of the one-way section (53) only in one direction whereby a relative motion of the control traveller with respect to the control track part (45) beyond the one-way section (53) is possible only in one travel direction of the control track.
6. Blood withdrawal system according to any one of the preceding claims, characterized in that the control track (47) of the control track part (45) includes a reversing section (54), which is designed and arranged in such a manner that the control traveller (45), once it is driven into the reversing section (54), can be driven out of the reversing section (54) only after the control traveller (46) performs a relative motion with respect to the control track part (45) in the reverse direction of its previous motion.
7. Blood withdrawal system according to any one of the preceding claims, characterized in that the motion of the lancet drive (9) is controlled by the relative motion of the control traveller (46) with respect to the control track part (45) during at least a part of the cocking phase until the triggering of the drive phase.
8. Blood withdrawal system according to any one of the preceding claims, characterized in that the lancet drive includes a drive rotor (17) which is driven by the drive spring (16) and is rotatable about an axis (C), and in that during the drive phase of the motion of the lancet drive (9) the rotational motion of the drive rotor (17) is converted by the output-side coupling mechanism (30) into the puncturing motion.
9. Blood withdrawal system according to claim 8, characterized in that one of the components (45, 46) of the track control mechanism (40) is coupled to the drive rotor (17) in such a manner that it rotates synchronous therewith.
10. Blood withdrawal system according to claim 9, characterized in that the component of the track control mechanism (40) which is coupled to the drive rotor (17) is the control traveller (46).
11. Blood withdrawal system according to any one of claims 8 to 10 in combination with claim 3, characterized in that the actuation element (14) of the cocking mechanism (13) is coupled to a force transmission part (20), which is guided within the housing such that it can be displaced in the longitudinal direction of the housing, and that the rotation axis (C) of the drive rotor extends transverse to the longitudinal axis (A) of the housing.
12. Blood withdrawal system according to claim 11, characterized in that the input-side coupling mechanism (29) includes a toothed rack (21) provided on the force transmission part (20), and a pinion gear (22) which engages the toothed rack (21).
13. Blood withdrawal system according to any one of claims 8 to 12, characterized in that the output-side coupling mechanism (30) includes a recess (32), which forms a guide curve (31), which recess is engaged by a guide pin (33), in such a manner that, during the rotational motion of the drive rotor (17) in the drive phase, the guide pin (33) travels along the guide curve (31) formed by the recess (32), whereby at least a part of the motion of the lancet (3) in the drive phase is controlled and the maximal displacement of the lancet in the puncturing direction (10) is determined by a lower reversing point of the guide curve.
14. Blood withdrawal system according to any one of claims 8 to 13, characterized in that the end of the drive spring (16) remote from the drive rotor (17) abuts against a rotatable tensioning element (19), the tensioning element (19) can be rotated in the same rotation direction, in which the drive rotor (17) rotates during the drive phase for tensioning of the drive spring (16), while the rotation of the drive rotor (17) is inhibited, and the tensioning element (19) is locked against a reverse motion during the drive phase such that the drive rotor performs, after release of the inhibition, a rotational motion which is transformed by the output-side coupling mechanism (30) into the puncturing motion of the lancet.
15. Blood withdrawal system according to claim 14, characterized in that the rotatable ten sinning element (19) and the drive rotor (17) are components of a drive module (15) which components are rotatable about a common axis (C).
16. Blood withdrawal system for withdrawing blood for diagnostic purposes, comprising a housing (8) with an exit opening (11) for the tip of a lancet (3), which can be moved within the housing (8) along a pre-determined puncturing path, and a lancet drive (9) with a drive spring (16) and a cocking mechanism (13), wherein - the cocking mechanism (13) includes an actuation element (14), which is coupled by an input -side coupling mechanism (29) to the drive spring (16) such that the drive spring (16) is tensioned when the actuation element (14) is moved during a cocking phase of the motion of the lancet drive (9), and - the drive spring (16) is coupled by an output-side coupling mechanism (30) to the lancet (3) such that the lancet (3) is, during a drive phase of the motion of the lancet drive (9) driven by the relaxing motion of the drive spring, moved at high speed along the pre-determined puncturing path in the puncturing direction (10) until its tip (6) exits from the exit opening (11) to generate a wound, in particular according to any one of the claims 1 to 15, characterized in that it includes a lancet ejection mechanism (41) with a release element (61) which is borne in the housing (8) such that it can be switched between a passive position and an active position, the lancet ejection mechanism (41) being activated when the release element (61) is in its active position such that actuating an actuation button of the lancet ejection mechanism (41) removes a used lancet (3) from the housing (8), and the lancet ejection mechanism (41) being inactivated when the release element (61) is in its passive position such that actuating the actuation button does not lead to the ejection of a lancet, the front end, in the puncturing direction, of the housing (8) with the puncturing opening (11) is formed by a cap (7), which can be removed in order to remove used lancets, the cap (7), when attached, interacts with the release element (61) such that it is in its passive position, and the release element (61) is switched to its active position upon removal of the cap (7).
17. Blood withdrawal system according to claim 16, characterized in that the release element (61) is a part of a force transmission chain (70) between the actuation button and a lancet (3), which force transmission chain (70) is required for the ejection of the lancet, the release element (61) can be displaced in the same direction as the actuation button, and the force transmission chain (70) is interrupted when the release element (61) is in its passive position.
18. Blood withdrawal system according to any one of claims 16 or 17, characterized in that the actuation element (14) of the cocking mechanism (13) of the lancet drive (9) is also the actuation button of the lancet ejection mechanism (41).
CA2475705A 2003-08-07 2004-07-26 Blood withdrawal system Expired - Fee Related CA2475705C (en)

Priority Applications (1)

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

Applications Claiming Priority (2)

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

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2663862A Division CA2663862C (en) 2003-08-07 2004-07-26 Blood withdrawal system

Publications (2)

Publication Number Publication Date
CA2475705A1 true CA2475705A1 (en) 2005-02-07
CA2475705C CA2475705C (en) 2010-06-01

Family

ID=33547189

Family Applications (2)

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CA2663862A Expired - Fee Related CA2663862C (en) 2003-08-07 2004-07-26 Blood withdrawal system
CA2475705A Expired - Fee Related CA2475705C (en) 2003-08-07 2004-07-26 Blood withdrawal system

Family Applications Before (1)

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CA2663862A Expired - Fee Related CA2663862C (en) 2003-08-07 2004-07-26 Blood withdrawal system

Country Status (7)

Country Link
US (2) US7273484B2 (en)
EP (2) EP1504718B1 (en)
JP (2) JP3939319B2 (en)
CA (2) CA2663862C (en)
DE (1) DE10336933B4 (en)
ES (1) ES2429437T3 (en)
PL (1) PL1504718T3 (en)

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