SENSOR WITH FINE NEEDLE HAVING CHANNEL FORMED THEREIN

• US 20110137143A1
• Filed: 07/16/2009
• Published: 06/09/2011
• Est. Priority Date: 08/01/2008
• Status: Abandoned Application

• Current Assignee: Lightnix, Inc., Sysmex Corporation
• Original Assignee: Lightnix, Inc., Sysmex Corporation
• Inventors: Sato, Toshiyuki, Fukuda, Mitsuo, Kikkawa, Yasuo
• Application Number:
  US13/056,849
• Publication Number:
  US 20110137143A1
• Time in Patent Office: Days
• US Class Current: 600/347
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1486 using enzyme electrodes, e.g. with immobilised oxidase
• CPC Class Codes: A61B 5/14865 invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150061 Means for enhancing collection
• CPC Class Codes: A61B 5/150213 Venting means
• CPC Class Codes: A61B 5/15029 for driving devices, i.e. means for driving the piercing element
• CPC Class Codes: A61B 5/150343 Collection vessels for collecting blood samples from the skin surface, e.g. test tubes, cuvettes sampling from within body cavities A61B5/150015, A61B5/150045
• 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 5/150419 comprising means for capillary action
• 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 5/150755 Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
• 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 5/15142 Devices intended for single use, i.e. disposable
• CPC Class Codes: A61B 5/1519 comprising driving means, e.g. a spring, for propelling the piercing unit
• CPC Class Codes: A61B 5/157 Devices characterised by integrated means for measuring characteristics of blood

Abstract

This sensor with a fine needle having a channel formed therein includes a fine needle portion of resin provided with a channel for sucking body fluid, a liquid sump portion, connected with the channel, pooling the body fluid, a sensor portion for detecting a specific component contained in the body fluid pooled in the liquid sump portion, a cover portion, in which the sensor portion is arranged, arranged to cover the liquid sump portion and an air hole connected with the channel formed in the fine needle portion through the liquid sump portion.

Claims

1. A sensor with a fine needle having a channel formed therein, comprising:

a fine needle portion of resin provided with a channel for sucking body fluid;

a liquid sump portion, connected with said channel, pooling said body fluid;

a sensor portion for detecting a specific component contained in the body fluid pooled in said liquid sump portion;

a cover portion, in which said sensor portion is arranged, arranged to cover said liquid sump portion; and

an air hole connected with the channel formed in said fine needle portion through said liquid sump portion.

2. The sensor with a fine needle having a channel formed therein according to claim 1, so formed as to introduce said body fluid into said liquid sump portion through said channel by capillarity.

3. The sensor with a fine needle having a channel formed therein according to claim 1 or 2, wherein

said channel is so formed that the side surface of at least part of said channel is opened to the atmosphere.

4. The sensor with a fine needle having a channel formed therein according to claim 1, wherein

the resin of said fine needle portion is biocompatible resin.

5. The sensor with a fine needle having a channel formed therein according to claim 4, wherein

said biocompatible resin is polylactic acid.

6. The sensor with a fine needle having a channel formed therein according to claim 1, wherein

said sensor portion is that for detecting glucose.

7. The sensor with a fine needle having a channel formed therein according to claim 1, wherein

an end portion of said air hole on the side opened to the atmosphere is arranged in the vicinity of said liquid sump portion.

8. The sensor with a fine needle having a channel formed therein according to claim 1, wherein

said liquid sump portion is provided in an outer shape having no angular portion on a suction side in plan view.

9. The sensor with a fine needle having a channel formed therein according to claim 1, wherein

said sensor portion includes a detection electrode for detecting the specific component contained in said body fluid and an introduction confirmation electrode provided in the vicinity of an end portion of said liquid sump portion opposite to the side connected with said channel for confirming that said body fluid has been introduced into said liquid sump portion.

10. The sensor with a fine needle having a channel formed therein according to claim 1, further comprising a body portion provided with said liquid sump portion, wherein

said body portion and said cover portion are made of the same type of resin material, and compression-bonded to each other without employing an adhesive.

11. The sensor with a fine needle having a channel formed therein according to claim 1, further comprising a body portion provided with said liquid sump portion, wherein

said body portion and said cover portion are bonded to each other with a double-faced adhesive tape.

12. The sensor with a fine needle having a channel formed therein according to claim 1, further comprising a body portion provided with said liquid sump portion, wherein

said air hole is formed in said body portion, in said cover portion or in both of said body portion and said cover portion, and connected to a portion of said liquid sump portion opposite to the side connected with said channel.

13. The sensor with a fine needle having a channel formed therein according to claim 1, wherein

surface treatment for improving hydrophilicity is performed on at least a portion of said channel exposed to the atmosphere.

14. The sensor with a fine needle having a channel formed therein according to claim 1, wherein

said cover portion is formed to be moved to a position covering said liquid sump portion in measurement.