CA2598770A1 - Puncturing system for withdrawing a body fluid - Google Patents

Puncturing system for withdrawing a body fluid Download PDF

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Publication number
CA2598770A1
CA2598770A1 CA002598770A CA2598770A CA2598770A1 CA 2598770 A1 CA2598770 A1 CA 2598770A1 CA 002598770 A CA002598770 A CA 002598770A CA 2598770 A CA2598770 A CA 2598770A CA 2598770 A1 CA2598770 A1 CA 2598770A1
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CA
Canada
Prior art keywords
puncturing
needle
reference element
skin
depth
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
CA002598770A
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French (fr)
Other versions
CA2598770C (en
Inventor
Frank Deck
Ortrud Quarder
Thomas Weiss
Christian Hoerauf
Michael Kistner
Ahmet Konya
Herbert Harttig
Felix Baader
Hans List
Karl-Peter Ebert
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F Hoffmann La Roche AG
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Individual
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Publication of CA2598770A1 publication Critical patent/CA2598770A1/en
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Publication of CA2598770C publication Critical patent/CA2598770C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15146—Devices loaded with multiple lancets simultaneously, e.g. for serial firing without reloading, for example by use of stocking means.
    • A61B5/15148—Constructional features of stocking means, e.g. strip, roll, disc, cartridge, belt or tube
    • 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
    • A61B5/150175—Adjustment of penetration depth
    • A61B5/15019—Depth adjustment mechanism using movable stops located inside the piercing device housing and limiting the travel of the drive mechanism
    • 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
    • A61B5/150175—Adjustment of penetration depth
    • A61B5/150198—Depth adjustment mechanism at the proximal end of the carrier of the piercing element
    • 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
    • A61B5/150358—Strips for collecting blood, e.g. absorbent
    • 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
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381—Design of piercing elements
    • A61B5/150503—Single-ended needles
    • 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
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150572—Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
    • 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
    • A61B5/150801—Means for facilitating use, e.g. by people with impaired vision; means for indicating when used correctly or incorrectly; means for alarming
    • A61B5/150832—Means for facilitating use, e.g. by people with impaired vision; means for indicating when used correctly or incorrectly; means for alarming by topography of the surface, e.g. Braille, embossed printing
    • 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
    • A61B5/150885—Preventing re-use
    • A61B5/150916—Preventing re-use by blocking components, e.g. piston, driving device or fluid passageway
    • 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
    • A61B5/15186—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
    • 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
    • A61B5/15196—Constructional features of reusable driving devices comprising driving means, e.g. a spring, for retracting the lancet unit into the driving device housing semi-automatically retracted, i.e. in which the retraction of the piercing unit requires a deliberate action by the user such as manual release of spring-biased retraction means

Abstract

The invention relates to a piercing system for removing bodily fluid from the skin of a human or animal. Said system comprises a disposable piercing unit (1), which contains a needle element (6) for puncturing the skin, a piercing device (2), which encompasses a piercing drive (4), said drive propelling a piercing displacement of the piercing unit (1), which is coupled to the piercing drive (4) by means of a coupling mechanism (3), a predefined value of the piercing depth being guaranteed using a piercing depth reference element (10), which comprises a skin contact surface (11) and the predefined value of the piercing depth being determined by the distance in the piercing direction between the skin contact surface (11) and the position of the needle tip at the inversion point of the piercing displacement. The piercing depth reference element (10) is connected to the needle element (6) and coupled to the drive in such a way that it is displaced together with the needle element (1) during at least one part of the propulsion phase and has a defined longitudinal position in the piercing direction in relation to the needle element (6), at least at the inverse point of the piercing displacement.

Claims (40)

1. Puncturing system for withdrawing a body fluid from the skin of a human or animal, comprising a needle element (6) for piercing into the skin, a puncturing instrument (2), which includes a puncturing drive (4), by which a puncturing movement (24) of the needle element (6), which is coupled to the puncturing drive (4) by means of a coupling mechanism (3), is driven, wherein - in a forward phase of the puncturing movement (24), the needle element (6) is moved along a predetermined movement path in a piercing direction until its tip (13) penetrates into the skin and, in a retraction phase of the puncturing movement (24), the needle element (6) is retracted after reaching a reversal point corresponding to the puncturing depth in the skin, - a predefined value of the puncturing depth is ensured by means of a puncturing depth reference element (10), which has a skin contact area (11), and - the predefined value of the puncturing depth is determined by the distance in the piercing direction, at the reversal point of the puncturing movement, between the skin contact area (11) and the position of the tip (13) of the needle element (6), characterized in that the puncturing depth reference element (10) is coupled to the drive by the coupling mechanism (3) in such a manner that it - is moved together with the needle element (6) at least during a part of the forward phase of the puncturing movement, and - has a defined longitudinal position in the piercing direction in relation to the needle element (6) at least at the reversal point of the puncturing movement.
2. Puncturing system according to claim 1, characterized in that the puncturing instrument (2) has a housing opening (35) at its forward end in the piercing direction, which is surrounded by a skin contact area (33), by which the puncturing instrument (2) abuts against the skin during the puncturing movement.
3. Puncturing system according to any one of the preceding claims, characterized in that the puncturing instrument (2) has a stroke adaptor (38), by which the longitudinal position of the reversal point of the puncturing movement (24) is at least partially adapted to the actual position of the skin surface, which varies for different puncturing actions.
4. Puncturing system according to claim 3, characterized in that the stroke adaptor (38) includes an elastic component (47) cooperating with the puncturing drive (4).
5. Puncturing system according to any one of claims 3 to 4, characterized in that the stroke adaptor (38) includes a detector for detecting the position of the skin surface and a control unit for controlling the puncturing movement as a function of the detected position of the skin surface.
6. Puncturing system according to claim 5, characterized in that the control unit is implemented in such a manner that the acceleration of the puncturing unit in the direction toward the skin during the forward phase of the puncturing movement is interrupted upon contact of the skin contact area (11) of the puncturing depth reference element (10) with the skin surface.
7. Puncturing system according to claim 5, characterized in that the position of the skin surface is detected before triggering a puncturing movement and the subsequent puncturing movement is adapted to the detected position.
8. Puncturing system according to any one of the preceding claims, characterized in that the needle element (6) and the puncturing depth reference element (10) are separate elements which can be shifted relative to each other in the piercing direction, and the puncturing depth is adjustable by changing the distance (d) existing at the reversal point between the skin contact area (11) of the puncturing depth reference element (10) and the tip (13) of the needle element (6).
9. Puncturing system according to claim 8, characterized in that, during the forward phase of the puncturing movement, at least at the contact instant at which the skin contact area (11) contacts the skin surface, the distance between the skin contact area (11) and the tip (13) of the needle element (6) is less than the predefined value of the puncturing depth, so that the skin is tensioned by the impact of the skin contact area, before the puncturing movement of the needle element reaches the reversal point.
10. Puncturing system according to claim 9, characterized in that, during the forward phase, at least at the contact instant, the tip (13) of the needle element (6) is located behind the skin contact area (11) in the piercing direction, so that the skin is tensioned by the impact of the skin contact area before the piercing into the skin occurs.
11. Puncturing system according to any one of the preceding claims, characterized in that the pressure with which the skin contact area (11) of the puncturing depth reference element (10) presses against the skin surface during the forward phase of the puncturing movement is so high that deterioration of the reproducibility of the puncturing depth, by a skin deformation occurring during piercing of the needle element into the skin, is reduced thereby.
12. Puncturing system according to any one of claims 8 to 11, characterized in that the coupling mechanism (3) includes a needle element coupler (16) comprising a needle element positioning part (16a), which has a stop (16b), cooperating with a corresponding stop (6b) of the needle element (6) in such a manner that the longitudinal position of the needle element (6) is, at least at the reversal point of the puncturing movement, determined by the contact of said stops (16b, 6b), the coupling mechanism (3) includes a reference element coupler (17) comprising a reference element positioning part (17a), which has a stop (17b), cooperating with a corresponding stop (10b) of the puncturing depth reference element (10) in such a manner that the longitudinal position of the puncturing depth reference element (10) is determined, at least at the reversal point of the puncturing movement, by the contact of said stops (17b, 10b), and the longitudinal position at which the positioning parts (16a, 17a) are located at the reversal point in relation to one another is changeable for adjusting the puncturing depth.
13. Puncturing system according to any one of the preceding claims, characterized in that the puncturing drive (4) is coupled to the needle element (6) during at least a part of the forward phase and the reference element (10) is coupled by means of a co-transport device (103) to the needle element (6) and thus to the puncturing drive (4) during at least a part of that part of the forward phase in which the needle element (6) is coupled to the puncturing drive (4).
14. Puncturing system according to claim 13, characterized in that the co-transport device (103) has puncturing depth limit stops (101, 125), one of which is coupled to each of the needle element (6) and the puncturing depth reference element (10), and the puncturing depth limit stops (101, 125) are in engagement with one another at the reversal point of the puncturing movement in such a manner that their relative distance in the longitudinal direction defines the longitudinal position of the needle tip (13) in relation to the skin contact area (11) of the puncturing depth reference element (10), and thus the puncturing depth.
15. Puncturing system according to any one of claims 13 or 14, characterized in that the puncturing depth reference element (10) is, during the section of the forward phase of the puncturing movement preceding the contact instant, elastically coupled via the co-transport device (103) to the needle element (6) and thus to the puncturing drive (4).
16. Puncturing system according to any one of claims 13 to 15, characterized in that the puncturing depth reference element (10) is coupled via a bidirectionally acting co-transport device (103) to the needle element (6) and thus to the puncturing drive (4), said co-transport device (103) comprising stops (143, 144) acting in the retraction phase, one of said stops being coupled to each of the needle element (6) and the puncturing depth reference element (10).
17. Puncturing system according to claim 16, characterized in that said stops (143, 144) are in engagement with one another during at least a part of the retraction phase in such a manner that the position of the needle tip (13) in relation to the skin contact area (11) of the puncturing depth reference element (10) is defined thereby and said stops (143, 144) acting in the retraction phase are positioned in such a manner that they define a residual puncturing depth by which the needle tip (13) protrudes in relation to the skin contact area (11).
18. Puncturing system according to any one of the preceding claims, characterized in that the diameter of the skin contact area is at least 1.5 mm and at most 6 mm.
19. Puncturing system according to any one of the preceding claims, characterized in that the puncturing depth reference element (10) rests, during a part of the forward phase, in a rest position by means of a reference base part (146) on a reference element bearing (105), and the puncturing depth reference element is accelerated in the forward phase, starting from the rest position, in the piercing direction by the piercing drive (4).
20. Puncturing system according to claim 19, characterized in that duration of the partial section of the puncturing -movement, during which the puncturing depth reference element (10) is moved together with the needle element (6), is at most 100 ms, preferably at most 50 ms, and especially preferably at most 10 ms.
21. Puncturing system according to any one of the preceding claims, characterized in that the puncturing drive (4) is implemented in such a manner that the retraction phase of the puncturing movement take place immediately after reaching the reversal point.
22. Puncturing system according to any one of claims 1 to 20, characterized in that the needle element has a capillary channel (70), through which a body fluid can be transported from the skin into a sample receiving area (71) of the needle element (6) and the puncturing drive (4) is implemented in such a manner that the movement is stopped or slowed during the retraction phase after reaching the reversal point for a time period (S) required for suctioning the body fluid.
23. Puncturing system according to any one of the preceding claims, characterized in that the drive (4) and its coupling to the puncturing depth reference element (10) and the needle element (6) are arranged and adapted such that the distance in the piercing direction between the skin contact area (11) of the puncturing depth reference element (10) and the position of the needle tip (13) is reduced, after reaching the reversal point, to a defined residual puncturing depth, the puncturing movement is slowed or stopped upon reaching the residual puncturing depth, and thereafter the needle (8) of the needle element (6) is pulled out of the skin.
24. Puncturing system according to claim 23, characterized in that the time from reaching the reversal point until reaching the residual puncturing depth is at most 2 seconds, preferably at most 1 second, and especially preferably at most 0.5 seconds.
25. Puncturing system according to any one of the preceding claims, characterized in that the puncturing instrument (2) is a multiple use item and comprises a holder (27), by means of which a puncturing unit (1) may be coupled interchangeably to the puncturing drive (4), at least the skin contact area (11) of the puncturing depth reference element (10) being formed on a disposable single-use element.
26. Puncturing system according to claim 25, characterized in that the puncturing depth reference element (10) has a reference element body (12) which extends from the skin contact area (11) opposite to the piercing direction and at least partially encloses a body part (7) of the needle element (6) and in that the longitudinal position of the needle element (6) in relation to the longitudinal position of the reference element body (12) is changed during the retraction phase of the puncturing movement or afterwards before the removal of the puncturing unit (1) from the holder (27) in such a manner that the needle tip (13) is retracted behind the skin contact area (11) of the puncturing depth reference element (10) for protection from injuries.
27. Puncturing system according to any one of claims 25 or 26, characterized in that it includes a magazine including a plurality of needle elements (6).
28. Puncturing system according to one of claims 25 to 27, characterized in that it has a puncturing depth reference element (10) which is adapted and arranged for cooperation with a plurality of needle elements (6) of the magazine (85), the needle elements (6) being transported in sequence into a position in which one needle element (6) at a time may be moved together with the puncturing depth reference element (10) during at least a part of the puncturing movement.
29. Puncturing system according to any one of claims 25 to 28, characterized in that it includes a needle element strip (331) including a plurality of needle elements (6), which are fixed on a carrier film (328) and sealed in such a manner that their needle tips (13) are hygienically protected, it has a transport device, by which the needle element strip (331) is transported step-by-step in the puncturing instrument such that one needle element (6) at a time is located in a puncture station (332) at a reference element base part (333), it comprises a puncture preparation device (335), by which the needle element (6) located in the puncture station (332) is brought into a puncture position, in which its needle tip (13) is exposed and oriented in the piercing direction, while the carrier film covers the reference element base part (333) in the surroundings of the needle tip (13) and forms the skin contact area (11), wherein the reference element base part (333) and the carrier film (328) including the skin contact area (11) together form the puncturing depth reference element (10) and are moved together during the puncturing movement.
30. Puncturing system according to claim 29, characterized in that the thickness of the carrier film is at most 100 µm, preferably at most 50 µm, and especially preferably at most 30 µm.
31. Puncturing system according to claim 29 or 30, characterized in that the needle elements are sealed by means of a cover film (329), having a thickness of at most 50 µm, preferably at most 25 µm, and especially preferably at most 15 µm.
32. Puncturing system according to one of claims 25 to 31, characterized in that the puncturing depth reference element (10) is adapted to function as a holder for the needle element (6) and has fixing means, by means of which the needle element (6) may be fixed in different longitudinal positions in relation to the puncturing depth reference element (10) for adjustment of the puncturing depth.
33. Disposable puncturing unit (1) for withdrawing a body fluid from the skin of a human or animal, in particular as a component of a system according to any one of the preceding claims, comprising a needle element (6) for piercing into the skin in a piercing direction, and a puncturing depth reference element (10), by which a maximum puncturing depth of the needle in the skin is limited when a skin contact area (11) of the puncturing depth reference element (10) contacts the skin, whereby a predefined value of the puncturing depth is ensured, characterized in that the longitudinal position in the piercing direction (24) of the puncturing depth reference element (10) in relation to the needle element (6) and thus the distance between the skin contact area (11) and the needle tip (13) is changeable for adjusting the predefined puncturing depth.
34. Disposable puncturing unit according to claim 33, characterized in that the puncturing depth reference element (10) has a reference element body (12), which extends from the skin contact area (11) opposite to the piercing direction and at least partially encloses a body part (7) of the needle element (6).
35. Disposable puncturing unit according to any one of claims 33 or 34, characterized in that the reference element body (12) and/or the needle element (6) has blocking means, which restrict the movement of the needle element (6) in relation to the reference element (10) after the usage of the puncturing unit (1) such that further use of the puncturing unit is prevented.
36. Disposable puncturing unit according to any one of claims 33 to 35 for use with a puncturing instrument (2), in which one disposable puncturing unit (1) at a time may be replaceably coupled to a puncturing drive (4) provided in the puncturing instrument (2), the puncturing unit (1) being coupled to the puncturing drive (4) during the puncturing movement (24) by means of a coupling mechanism (3), and the coupling mechanism (3) comprising a needle element positioning part (16a), characterized in that the needle element (6) has a coupling structure, which cooperates with a corresponding coupling profile of the needle element positioning part (16a) for coupling the needle element (6) to the needle element positioning part (16a).
37. Disposable puncturing unit according to claim 36 for use with a puncturing instrument having a coupling mechanism comprising a reference element positioning part (17a), characterized in that the puncturing depth reference element (10) also has a coupling structure, which cooperates with a corresponding coupling profile of the reference element positioning part for coupling the reference element to the reference element positioning part.
38. Disposable puncturing unit according to any one of claims 33 to 37, characterized in that the needle element (6) has a capillary channel (70), through which body fluid can flow from the skin into a sample receiving area (71) of the needle element (6).
39. Disposable puncturing unit according to claim 38, characterized in that it has a window (79), for allowing an optical measurement on a fluid in its sample receiving area (71).
40. Disposable puncturing unit according to claim 38, characterized in that it has electrical contacts for performing an electrical measurement on a fluid in its sample receiving area (71).
CA2598770A 2005-03-03 2006-03-02 Puncturing system for withdrawing a body fluid Expired - Fee Related CA2598770C (en)

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CN101146477B (en) 2012-11-07
US8231547B2 (en) 2012-07-31
US20080082023A1 (en) 2008-04-03
CA2598770C (en) 2011-07-19
WO2006092309A3 (en) 2006-12-21
WO2006092309A2 (en) 2006-09-08
WO2006092309A8 (en) 2007-11-22
EP1865846B1 (en) 2015-08-12
HK1118438A1 (en) 2009-02-13
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EP1865846A2 (en) 2007-12-19
JP2008531156A (en) 2008-08-14

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