BLOOD COMPONENT MEASUREMENT DEVICE AND TIP FOR BLOOD MEASUREMENT

• US 20110137207A1
• Filed: 02/16/2011
• Published: 06/09/2011
• Est. Priority Date: 05/16/2005
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha
• Original Assignee: Terumo Kabushiki Kaisha
• Inventors: NISHIUCHI, Daisuke
• Granted Patent: US 8,287,468 B2
• Time in Patent Office: Days
• US Class Current: 600/583
• 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 has a puncturing unit provided inside a housing and having a puncture needle; a button unit for advancing and retreating the puncture needle; a contact mechanism coming into contact with the skin of a person to be measured; and a holder for displaceably holding the puncturing unit. The blood component measurement device also has an introduction section at the substantially center of a contact member. After the skin is punctured by the puncture needle provided at the substantially center of the mechanism, the introduction section introduces blood to testing paper when the contact member of the contact mechanism is displaced in a sliding manner along a guide member.

Claims

1. A tip for blood measurement, comprising:

a mounted section to be mounted to a blood component measurement device;

a puncture needle possessing an axis and movable for being advanced in an axial direction of the needle to puncture skin and produce a blood sample, and for being retracted in the axial direction of the puncture needle;

a contact section which has a cavity permitting said puncture needle to pass therethrough and which comes into contact with the skin;

a guide section adjacent the contact section;

a measurement unit for measuring a component of the blood sample; and

a blood introduction section in communication with the measurement unit,

wherein said contact section is configured to obliquely slide against and relative to the blood introduction section to be obliquely displaceable relative to the axial direction of said puncture needle, and

said contact section is provided with a first slant surface opposed to the guide section and inclined at a predetermined angle relative to the axial direction of said puncture needle, said guide section is provided with a second slant surface in contact with said first slant surface and being at substantially the same angle as said first slant surface, and said contact section is displaceable along said second slant surface via said first slant surface.

2. The tip for blood component measurement as set forth in claim 1, wherein the puncture needle is held in a hub that is slidably positioned inside the guide section.

3. The tip for blood component measurement as set forth in claim 1, wherein the first slant surface is angled at an oblique angle relative to the axial direction of said puncture needle.

4. The tip for blood component measurement as set forth in claim 1, wherein

the puncture needle is movably mounted in a holding hole in the guide section for movement in the axial direction,

the blood introduction section comprises an introduction port through which the blood sample passes from the skin to the measurement unit,

the holding hole opens to one side surface of the guide section, and

the introduction port extends outwardly from the one side surface of the guide section.

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

wherein the contact section is engageable with a stopper in the blood component measurement device, the stopper for restricting displacement of the contact section when engaged with the contact section, and the contact section is movable out of engagement with the stopper after puncture of the skin by the puncture needle to permit the displacement of the contact section.

6. A tip for blood component measurement comprising:

a puncture needle possessing an axis, the needle being movable in an axial direction of the needle to perform advancing movement during which the needle punctures skin to produce a blood sample, and being movable in the axial direction of the needle to perform retracting movement;

a contact section adapted to contact skin and having a cavity through which the needle is moved during the advancing movement of the needle, the contact section including a contact section surface;

a measurement unit for measuring a component of the blood sample;

a blood introduction section spaced from the puncture needle in a direction substantially orthogonal to the axis of the puncture needle and in communication with the measurement unit;

a guide block having a guide block surface in sliding contact with the contact section surface of the contact section so that relative movement between the contact section and the guide block is permitted;

the puncture needle and the blood introduction section being provided on the guide block;

said contact section surface is a first slant surface opposed to the guide section and inclined at a predetermined angle relative to the axial direction of said needle, said guide surface comprises a second slant surface in contact with said first slant surface and being at substantially the same angle as said first slant surface, and said contact section is displaceable along said second slant surface via said first slant surface.

7. The tip for blood component measurement as set forth in claim 6, wherein the contact section includes a pair of first slant surfaces and the guide block includes a pair of second slant surfaces, each of the first slant surfaces being in sliding contact with one of the second slant surfaces.

8. The tip for blood component measurement as set forth in claim 6, wherein the needle is held in a hub that is slidably positioned inside the guide block.

9. A tip for blood component measurement comprising:

a contact section adapted to be contacted by skin of a patient whose blood component is to be measured, the contact section comprising a through hole and a sliding surface;

a guide section positioned adjacent the contact section and comprising a needle movably mounted in a holding hole in the guide section for movement in an advancing direction relative to the contact section to move a tip end of the needle through the through hole of the contact section to puncture the skin and thereby result in a blood sample, the holding hole possessing an axis, the sliding surface of the contact section being obliquely oriented relative to the axis of the needle;

the guide section comprising a blood introduction part comprised of an introduction port and a passage, the introduction port being orthogonally spaced from the axis of the holding hole;

the guide section being provided with a recess adapted to receive a test paper impregnated with a reagent;

the recess in the guide section communicating with the introduction port by way of the passage so that the blood sample introduced into the introduction port is conveyed to the recess by way of the passage, the introduction port being spaced from the axis of the needle;

a measurement unit positioned in opposition to the recess to measure a component in the blood sample;

the contact section and the guide section being relatively movable between a first relative position in which the tip end of the needle is located in a first region of the through hole while the introduction port is spaced from said first region, and a second relative position in which the introduction port is located in said first region of the through hole while the tip end of the needle is spaced from said first region;

said sliding surface of the contact section is a first slant surface opposed to the guide section and inclined at a predetermined angle relative to the axis of the needle, said guide section is provided with a second slant surface in contact with said first slant surface and being at substantially the same angle as said first slant surface, and said contact section is displaceable along said second slant surface via said first slant surface.

10. The tip for blood component measurement as set forth in claim 9, wherein the first slant surface is angled at an oblique angle relative to the axis of the holding hole, and the first slant surface is in sliding engagement with the second slant surface during movement between the first and second relative positions.

11. The tip for blood component measurement as set forth in claim 9, wherein the needle is held in a hub that is slidably positioned in the holding hole of the guide section.

12. The tip for blood component measurement as set forth in claim 9, wherein the introduction port in the second relative position is positioned more forwardly relative to the contact section than in the first relative position, and wherein the tip end of the needle in the first relative position is positioned more forwardly relative to the contact section than in the second relative position.

13. The tip for blood component measurement as set forth in claim 9, wherein the holding hole opens to one side surface of the guide section, and the introduction port extends outwardly from the one side surface of the guide section.