LANCING DEVICES

• US 20150250409A1
• Filed: 05/22/2015
• Published: 09/10/2015
• Est. Priority Date: 08/14/2007
• Status: Active Application

• Current Assignee: Owen Mumford
• Original Assignee: Owen Mumford
• Inventors: NICHOLLS, Clive, WOZENCROFT, Robert Michael
• Application Number:
  US14/719,354
• Publication Number:
  US 20150250409A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150175 Adjustment of penetration depth
• CPC Class Codes: A61B 5/150183 Depth adjustment mechanism using end caps mounted at the distal end of the sampling device, i.e. the end-caps are adjustably positioned relative to the piercing device housing for example by rotating or screwing
• 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 5/150549 Protectors removed by rotational movement, e.g. torsion or screwing
• CPC Class Codes: A61B 5/150618 Integrally moulded protectors, e.g. protectors simultaneously moulded together with a further component, e.g. a hub, of the piercing element
• CPC Class Codes: A61B 5/150717 manually removed
• CPC Class Codes: A61B 5/151 Devices specially adapted for taking samples of capillary blood, e.g. by lancets , needles or blades
• CPC Class Codes: A61B 5/15107 Piercing being assisted by a triggering mechanism
• 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 5/15144 comprising driving means, e.g. a spring, for retracting the piercing unit into the housing
• CPC Class Codes: A61B 5/15186 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
• CPC Class Codes: A61B 5/15188 Constructional features of reusable driving devices
• 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 includes a housing (10, 12) for receiving in use a replaceable lancet (34) introduced into said housing, a drive (58, 59) actuable to drive the lancet momentarily to project its tip from the housing, and a nose portion (14) having an aperture through which said lancet projects when fired. The nose portion is threadedly engaged (78, 81) with the forward end (10) of the housing to allow the penetration depth of said lancet tip to be pre-set, and is resiliently deformable between a position in which it is locked against rotation and a position in which it is free to rotate.

Claims

1. A lancing device, comprising:

a housing (10, 12) for receiving in use a replaceable lancet (34) introduced into said housing;

a drive (58, 59) actuable to drive said lancet momentarily to project a tip of the lancet tip from the housing; and

a nose portion assembly (98, 104) mounted on a forward end (10) of said housing, said nose portion assembly comprising a nose portion element (98) slideably and non-rotatably mounted on the forward end of said housing, the nose portion being captive on a rotary collar (104) which is threadedly engaged with the forward end portion of the housing to allow a penetration depth of the lancet tip to be pre-set.

2. The lancing device according to claim 1, wherein the forward end portion of the housing includes a forward extension having anti-rotation elements which engage with the nose portion element to prevent relative rotation.

3. The lancing device according to claim 2, wherein the anti-rotation elements are anti-rotation splines, and the nose portion element includes grooves which slide over and engage with the anti-rotation splines.

4. The lancing device according to claim 1, wherein the collar is captively mounted to the nose portion, such that when the collar is rotated, an axial position of the collar is adjusted.

5. The lancing device according to claim 1, wherein the nose portion is provided with a groove and the collar is provided with a pip which engages with the groove to captively mount the collar to the nose portion.

6. The lancing device according to claim 1, wherein the collar includes a marker which indicates the penetration setting of the device using indicia provided on the forward housing.

7. The lancing device according to claim 1, further comprising:

a lancet release element (20) for effecting relative angular movement of a lancet holder and said lancet generally about the longitudinal axis of the lancet from a position in which said lancet (34) is retained by said holder (22) and a position in which said lancet is released from said retention.

8. The lancing device according to claim 7, wherein said lancet holder (22) is mounted for rotational movement with respect to said housing.

9. The lancing device according to claim 7, wherein said lancet holder (22) is adapted to receive said lancet in snap engagement (30) when pushed into said device

10. The lancing device according to claim 1, intended for utilization with a lancet having a portion of non-circular cross-section, said housing having a non-circular cross-section passage through which said lancet is introduced into said housing.

11. The lancing device according to claim 1, wherein the drive comprises a hammer moveable to a cocked position within the housing.

13. The lancing device according to claim 7, wherein the lancet holder has a cylindrical rear portion.

14. The lancing device according to claim 13, wherein a forward end of the cylindrical rear portion comprises a circumferential guide flange.

15. The lancing device according to claim 14, wherein the cylindrical rear portion has two resiliently deformable arms.

16. The lancing device according to claim 15, wherein the two resiliently deformable arms terminate forwardly in inwardly directed barbs.

17. The lancing device according to claim 7, wherein the lancet holder is urged rearwardly by a compression spring.

18. The lancing device according to claim 1, wherein the lancet has a main body portion having a central cylindrical stem and diametrically opposed flanges.

19. The lancing device according to claim 18, wherein the flanges are chamfered.

20. The lancing device according to claim 18, wherein the flanges are cut away to form a latch recess.

12. The lancing device according to claim 12, wherein a lancet release element is adapted to latch said hammer in a cocked position.