Blood component measurement device and tip for blood measurement

• US 8,157,749 B2
• Filed: 05/16/2006
• Issued: 04/17/2012
• Est. Priority Date: 05/16/2005
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Original Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Inventors: Nishiuchi, Daisuke
• Primary Examiner(s): Hindenburg, Max
• Assistant Examiner(s): Nguyen, H. Q.
• Application Number:
  US11/920,414
• Publication Number:
  US 20090105613A1
• Time in Patent Office: 2,163 Days
• Field of Search: 600/583, 600/584, 600/573, 600/576, 606181-183
• US Class Current: 600/584
• CPC Class Codes: A61B 2562/0295 Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157 disposable multilayered or laminated electrodes G01N27/307; details of handling chemical test elements G01N33/4875
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150068 by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
• CPC Class Codes: A61B 5/150358 Strips for collecting blood, e.g. absorbent optical reagent test strips G01N21/8483; chemical reagent test strips G01N33/4875, G01N33/52
• 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 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/15111 Semi-automatically triggered, e.g. at the end of the cocking procedure, for instance by biasing the main drive spring or when reaching sufficient contact pressure, the piercing device is automatically triggered without any deliberate action by the user
• 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 5/1513 comprising linear sliding guides comprising tooth-shaped elements A61B5/15132
• 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
• CPC Class Codes: A61B 5/157 Devices characterised by integrated means for measuring characteristics of blood

Abstract

A blood component measurement device (10) has a puncturing unit (18) provided inside a housing (12) and having a puncture needle (16); a button unit (20) for advancing and retreating the puncture needle (16); a contact mechanism (68) coming into contact with the skin of a person to be measured; and a holder (14) for displaceably holding the puncturing unit (18). The blood component measurement device (10) also has an introduction section (94) at the substantially center of a contact member (70). After the skin is punctured by the puncture needle (16) provided at the substantially center of the mechanism (68), the introduction section (94) introduces blood to testing paper (100) when the contact member (70) of the contact mechanism (68) is displaced in a sliding manner along a guide member (72).

Claims

1. A blood component measurement device comprising:

a tip for blood measurement comprising a puncture needle possessing an axis and linearly movable for being advanced and retreated in an axial direction of the needle;

a contact section which has a cavity permitting said puncture needle to pass therethrough and which comes into contact with a skin, the contact section displaceable in a direction that is neither parallel nor perpendicular to the axis of said puncture needle;

a measurement unit for measuring a component of blood sampled; and

a blood introduction section spaced from said puncture needle in a direction substantially orthogonal to the axis of said puncture needle and communicating with said measurement unit, the blood introduction section being at a position out of contact with the skin when the puncture needle punctures the skin, and

after the skin is punctured by said puncture needle by linear advancement of the puncture needle in the axial direction, said blood introduction section is configured to be displaced from the position out of contact with the skin, in the axial direction of said puncture needle toward the skin and also in a direction substantially orthogonal to the axis of said puncture needle.

2. The blood component measurement device as set forth in claim 1,

wherein said blood component measurement device further includes a guide section holding said contact section, and

said blood introduction section is configured to be displaced under a guiding action of said guide section.

3. The blood component measurement device as set forth in claim 1,

wherein said contact section forms a part of said tip for blood measurement.

4. The blood component measurement device as set forth in claim 1,

wherein said blood introduction section forms a part of said tip for blood measurement.

5. The blood component measurement device as set forth in claim 1,

wherein said measurement unit forms a part of said tip for blood measurement.

6. The blood component measurement device as set forth in claim 1,

wherein said blood component measurement device includes a stopper which contacts the contact section for restricting displacement of said contact section, the stopper configured to move out of contact with the contact section after puncture of the skin by the puncture needle to permit the displacement of the contact section.

7. The blood component measurement device as set forth in claim 2,

wherein said contact section is provided with a first slant surface opposed to said guide section and inclined at a predetermined angle, said guide section is provided with a second slant surface making contact with said first slant surface, the first slant surface and the second slant surface are oriented at substantially the same angle, and said contact section is configured to be displaced relative to said guide section as a result of said first slant surface sliding along said second slant surface.

8. The blood component measurement device as set forth in claim 1,

wherein said blood component measurement device includes a housing, a button unit displaceably disposed inside said housing and operable to cancel a condition where the advancing and retreating of said puncture needle are restricted, and said button unit is exposed from said housing when said contact section is pressed against the skin.

9. The blood component measurement device as set forth in claim 1, wherein the blood introduction section is part of a guide section, and the guide section includes a sliding surface which is obliquely oriented relative to the axis of the needle, and wherein the blood introduction section is displaceable by sliding movement along the sliding surface.

10. A method for obtaining a blood sample comprising:

pressing a body part against a contact section which possesses a through hole;

linearly moving a needle possessing an axis in the axial direction of the needle through the through hole in the contact section to puncture skin of the body part at a puncture site with a tip end of the needle to result in a blood sample, the tip end of the needle being located in a first region of the through hole during puncture of the skin, the needle passing through a guide block during puncture of the skin, the guide block being movable relative to the contact section, the guide block including a blood introduction port connected to a passage, the blood introduction port being orthogonally spaced from the axis of the tip end of the needle and outside the first region;

relatively moving the guide block and the contact section after the puncture of the skin to cause the tip end of the needle to move away from said first region of the through hole of the contact section and to move the introduction port into the first region of the through hole of the contact section so that the introduction port is positioned adjacent the puncture site, wherein relatively moving the guide block and the contact section includes displacing the contact section in a direction that is neither parallel nor perpendicular to the axis of said puncture needle;

the blood sample at the puncture site being introduced into the introduction port and supplied to a test paper containing a reagent; and

measuring a component in the blood sample supplied to the test paper.

11. The method according to claim 10, wherein the first region of the through hole of the contact section is a center of the through hole of the contact section.

12. The method according to claim 10, wherein the relatively moving of the guide block and the contact section comprises the guide block and the contact section sliding relative to one another in a direction oblique to the axis of the tip end of the needle.