Lancet

• US 5,385,571 A
• Filed: 02/05/1993
• Issued: 01/31/1995
• Est. Priority Date: 08/28/1992
• Status: Expired due to Term

• Current Assignee: Asahi Polyslider Company, Limited (Izumi-Cosmo Co., Ltd.)
• Original Assignee: Apls Co., Ltd.
• Inventors: Morita, Susumu
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): Lewis, William W.
• Application Number:
  US08/013,777
• Time in Patent Office: 725 Days
• Field of Search: 606/181, 606/182, 606/183, 606/184, 606/185, 128/637, 128/770, 628/898
• US Class Current: 606/181
• 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 5/150549 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 5/15105 Purely manual piercing, i.e. the user pierces the skin without the assistance of any driving means or driving devices
• CPC Class Codes: A61B 5/15142 Devices intended for single use, i.e. disposable

Abstract

A lancet comprising a lancet body having a needle end protruding from a lancet end, and a needle protector for protecting the protruding needle end before use, the needle protector comprising a hood portion tightly fittable on the lancet end from which the needle end protrudes in such a manner that the hood may be fitted over the lancet end to the needle end to substantially insulate the needle end from the environment after use. The lancet body and the needle protector may be integrally molded, and separated before use to expose the needle end. After use, the hood of the protector may be fitted over the lancet end. Thus, the lancet as a whole can be disposed in a safer manner than the prior art lancets.

Claims

1. A lancet comprising:

a needle end;

a lancet body, the needle end being molded in the lancet body and protruding from a lancet end of the lancet body;

a separable needle protector unitarily formed with said lancet body and needle end such that the needle end is embedded in said protector to protect the needle end before use; and

the needle protector comprising a hood portion having an opening and being tightly fittable to the lancet end from which the needle end protrudes, the hood portion having a flat contact base substantially larger than and opposite the opening, the hood portion thereby being substantially free-standing with the opening upwardly oriented in such a manner that the lancet end, after use, may be tightly engaged by interference or snap fit into said opening to substantially insulate the needle end from the environment by inserting the lancet end substantially downwardly into the opening thereby to surround the lancet end of the lancet body with the hood portion, so as to be separable only upon application of a force in excess of about 1 Kg.

2. The lancet as defined in claim 1, wherein the lancet end is interference-fitted in the hood portion of the needle protector.

3. The lancet as defined in claim 2 wherein the hood portion has at its one end an opening for receiving the lancet end, and at its other end a closed bottom comprising a thick wall which is pierced by at least a portion of the protruding needle end.

4. The lancet as defined in claim 2 wherein the hood portion has at its one end an opening for receiving the lancet end, and at its other end a bottom through which a bore is formed with a further opening, and wherein each of the bore and the further opening is of such a length, diameter and shape as to insulate the needle end from the outside.

5. The lancet as defined in claim 2 wherein the hood portion has at its one end an opening for receiving the lancet end, and at its other end a bottom having an elongate recess which extends towards but short of the other end in such a manner as to insulate the needle end from the outside.

6. The lancet as defined in claim 1, wherein the lancet end is snap-fitted in the hood portion of the needle protector.

7. The lancet as defined in claim 6 wherein the hood portion has at its one end an opening for receiving the lancet end, and at its other end a closed bottom comprising a thick wall which is pierced by at least a portion of the protruding needle end.

8. The lancet as defined in claim 6 wherein the hood portion has at its one end an opening for receiving the lancet end, and at its other end a bottom through which a bore is formed with a further opening, and wherein each of the bore and the further opening is of such a length, diameter and shape as to insulate the needle end from the outside.

9. The lancet as defined in claim 6 wherein the hood portion has at its one end an opening for receiving the lancet end, and at its other end a bottom having an elongate recess which extends towards but short of the other end in such a manner as to insulate the needle end from the outside.

10. The lancet as defined in claim 1 wherein the hood portion has at its one end an opening for receiving the lancet end, and at its other end a closed bottom comprising a thick wall which is pierced by at least a portion of the protruding needle end.

11. The lancet as defined in claim 1 wherein the hood portion has at its one end an opening for receiving the lancet end, and also has at its other end a bottom through which a bore is formed with a further opening, and wherein each of the bore and the further opening is of such a length, diameter and shape as to insulate the needle end from the outside.

12. The lancet as defined in claim 1 wherein the hood portion has at its one end an opening for receiving the lancet end, and at its other end a bottom having an elongate recess which extends towards but short of the other end in such a manner as to insulate the needle end from the outside.

13. The lancet as defined in claim 1, wherein the lancet body and the needle protector comprise molded polymeric material.

14. The lancet as defined in claim 1, wherein the lancet is unitarily molded in a single two part mold having no movable cores.

15. A method of insulating from the environment the needle end of a lancet body unitarily molded with a needle protector in which the needle end is embedded during molding, comprising the steps of:

(a) separating the needle end from an integrally molded hood portion of the needle protector;

(b) placing a flat contact base of the needle protector on a supporting surface such that the needle protector is free-standing with an opening in the needle protector upwardly oriented;

(c) and pressing the lancet body and needle end downwardly into the opening in the free-standing needle protector, positively but releasably engaging the lancet body with the opening by interference fit or snap fit whereby the needle end is substantially insulated from the environment, the lancet body and needle protector being separable only upon application of a substantial force in excess of about 1 kg.

16. In a method of insulating the needle end of a lancet body unitarily molded with a needle protector in which the needle end is embedded during molding, the steps of:

(a) before use, separating the needle end from a molded hood portion of said needle protector,

(b) after use of the needle, placing a flat contact base of the needle protector on a surface such that the needle protector is free standing with an opening in the needle protector upwardly oriented, and

(c) inserting the lancet body and needle end downwardly into the opening, thereby tightly engaging the lancet body releasably into said opening by interference fit or snap fit to insulate the used needle end, so that the lancet body and needle protector are separable only upon application of a substantial force in excess of about 1 kg.