Body fluid collecting device

• US 20070197936A1
• Filed: 03/11/2005
• Published: 08/23/2007
• Est. Priority Date: 03/15/2004
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Original Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Inventors: Takemoto, Masafumi, Takinami, Masao
• Granted Patent: US 7,798,978 B2
• Time in Patent Office: Days
• US Class Current: 600/583
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150099 by negative pressure, other than vacuum extraction into a syringe by pulling on the piston rod or into pre-evacuated tubes
• CPC Class Codes: A61B 5/150229 Pumps for assisting the blood sampling
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• 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 5/15117 comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
• CPC Class Codes: A61B 5/157 Devices characterised by integrated means for measuring characteristics of blood

Abstract

A body fluid collecting device includes a tip with a puncture needle and a front end opening at the front end portion thereof for allowing the puncture needle to pass therethrough. The device additionally includes a device body, having a contact part for fitting skin thereto, a tip mounting part having a storage space formed therein capable of storing the tip, a pump for depressurizing the inside of the storage space, and a movable means. The movable means is capable of moving the front end portion of the tip mounting part along a longitudinal direction of the puncture needle, and within a specified range, when the storage space is depressurized by the pump under a condition in which the tip is stored in the storage space, the skin is fitted to the contact part, and the front end opening is sealed.

Claims

1. A body fluid collecting device including a tip with a puncture needle and a front end opening at a front end portion thereof for allowing said puncture needle to pass therethrough, said body fluid collecting device comprising:

a device body having a contact part for fitting skin thereto;

a tip mounting part having a space formed therein capable of storing said tip;

depressurizing means for depressurizing an inside of said space; and

movable means capable of moving said front end portion of said tip mounting part along a longitudinal direction of said puncture needle, and within a specified range, when said space is depressurized by said depressurizing means, under a condition in which said tip is stored in said space, said skin is fitted to said contact part, and said front end opening is sealed.

2. The body fluid collecting device as set forth in claim 1, wherein said tip mounting part is capable of extension and contraction along said longitudinal direction of said puncture needle, wherein the volume of said space is varied by said extension and contraction.

3. The body fluid collecting device as set forth in claim 2, further comprising a seal member for maintaining air-tightness of said space when said tip mounting part extends or contracts.

4. The body fluid collecting device as set forth in claim 1, wherein:

said tip mounting part comprises a first portion and a second portion provided on a base end side of said first portion, so as to be movable relative to said device body; and

said first portion and said second portion are movable relative to each other along said longitudinal direction of said puncture needle, such that the volume of said space is varied by movement thereof.

5. The body fluid collecting device as set forth in claim 4, wherein:

one of said device body and said second portion comprises a guide pin, and the other comprises a guide hole in which said guide pin is inserted; and

an inner peripheral surface of said guide hole slides along an outer peripheral surface of said guide pin when said second portion moves relative to said device body.

6. The body fluid collecting device as set forth in claim 4, wherein a biasing means is provided for biasing said first member and said second member so as to be spaced apart from each other.

7. The body fluid collecting device as set forth in claim 4, further comprising a seal member for maintaining air-tightness of said space when said first portion and said second portion are moved.

8. The body fluid collecting device as set forth in claim 1, further comprising a puncture means for operating said puncture needle to puncture said skin, under a condition in which said tip is stored in said space, said skin is fitted to said contact part, and said front end opening is sealed.

9. The body fluid collecting device as set forth in claim 1, further comprising a measuring means for measuring an amount of a predetermined component in a body fluid.

10. The body fluid collecting device as set forth in claim 2, wherein:

said tip mounting part comprises a first portion and a second portion provided on a base end side of said first portion, so as to be movable relative to said device body; and

said first portion and said second portion are movable relative to each other along said longitudinal direction of said puncture needle, such that the volume of said space is varied by movement thereof.

11. The body fluid collecting device as set forth in claim 3, wherein:

said tip mounting part comprises a first portion and a second portion provided on a base end side of said first portion, so as to be movable relative to said device body; and

said first portion and said second portion are movable relative to each other along said longitudinal direction of said puncture needle, such that the volume of said space is varied by movement thereof.

12. The body fluid collecting device as set forth in claim 2, further comprising a puncture means for operating said puncture needle to puncture said skin, under a condition in which said tip is stored in said space, said skin is fitted to said contact part, and said front end opening is sealed.

13. The body fluid collecting device as set forth in claim 3, further comprising a puncture means for operating said puncture needle to puncture said skin, under a condition in which said tip is stored in said space, said skin is fitted to said contact part, and said front end opening is sealed.

14. The body fluid collecting device as set forth in claim 2, further comprising a measuring means for measuring an amount of a predetermined component in a body fluid.

15. The body fluid collecting device as set forth in claim 3, further comprising a measuring means for measuring an amount of a predetermined component in a body fluid.