JP2000116628A5 - - Google Patents

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JP2000116628A5
JP2000116628A5 JP1998314029A JP31402998A JP2000116628A5 JP 2000116628 A5 JP2000116628 A5 JP 2000116628A5 JP 1998314029 A JP1998314029 A JP 1998314029A JP 31402998 A JP31402998 A JP 31402998A JP 2000116628 A5 JP2000116628 A5 JP 2000116628A5
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biosensor
hole
base plate
skin contact
view
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JP1998314029A
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JP4166878B2 (en
JP2000116628A (en
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【特許請求の範囲】
【請求項1】 本体に、装着体を装着して使用する体液測定装置において、上記装着体に使用されるバイオセンサであって、
上記装着体は、皮膚当接面を有するバイオセンサと、尖端が皮膚当接面から突出する進出位置と尖端が皮膚当接面から没入する退避位置との間を移動可能である穿刺体とを備えており、
上記本体は、上記装着体が装着されたときに上記バイオセンサの各電極に接触してこれらに導通する端子、この端子を介して得られる電気信号に基づいて測定値を決定する電子回路、および、上記穿刺体を前進駆動してこの穿刺体に進出位置をとらせるための駆動機構を備えてり、
上記皮膚当接面疎水化処理を施してあることを特徴とするバイオセンサ。
【請求項2】 前記請求項1記載のバイオセンサであって、上記皮膚当接面部分を疎水性材料を用いて作製したことを特徴とするバイオセンサ。
【請求項3】 前記請求項1記載のバイオセンサであって、上記皮膚当接面内における上記穿刺体の尖端の移動を許容するための貫通孔ごく近傍周辺部に、立体遮蔽物を配していることを特徴とするバイオセンサ。
[Claims]
To 1. A body, in the body fluid measuring apparatus to use by mounting the mounting member, a biosensor for use in the mounting member,
The wearing body includes a biosensor having a skin contact surface, a puncture body capable of moving between an advance position where the tip protrudes from the skin contact surface and a retracted position where the tip is immersed from the skin contact surface . Is equipped with
The main body has a terminal that contacts each electrode of the biosensor and conducts to the electrode when the mounting body is mounted, an electronic circuit that determines a measured value based on an electric signal obtained through the terminal, and an electronic circuit that determines a measured value. , Ri you a driving mechanism for assume a advanced position to the puncture body moves forward driving the puncture body,
Biosensor, characterized in that are subjected to a hydrophobic treatment to the skin contact surface.
2. A biosensor of claim 1, wherein the biosensor, characterized in that the portion of the skin contact surface produced using a hydrophobic material.
3. A biosensor of claim 1, wherein, in the immediate vicinity periphery of the through hole for allowing the movement of the tip of the lancet in the skin contact plane, distribution steric shield A biosensor characterized by being

図2ないし図5に装着体30の一例の詳細を示す。この装着体30は、円筒部34と、この円筒部34の先端を塞ぐように位置する底壁部35とを備える大略キャップ状をしており、その主要部分は樹脂成形によって作製される。円筒部34の内径は、本体20の前部筒状部24の外径と対応させられており、この前部筒状部24に被せるようにして簡便に装着することができる。 2 to 5 show details of an example of the wearing body 30. The mounting body 30 has a substantially cap shape including a cylindrical portion 34 and a bottom wall portion 35 located so as to close the tip of the cylindrical portion 34, and the main portion thereof is manufactured by resin molding. The inner diameter of the cylindrical portion 34 is caused to correspond to the outer diameter of the front cylindrical portion 24 of the body 20, Ru can be easily mounted as to cover the the front cylindrical portion 24.

装着体30の底壁部35にはまた、上記穿刺体31が収容された陥没部35Aを覆うようにして、板状バイオセンサ36が貼着される。このバイオセンサ36は、図6ないし図8に示したように穿刺体31の穿刺針31cが通過しうる貫通36aと、この貫通36aと連通して厚みのなかを底壁部35と平行に延びる体液通路36bを備え、この体液通路36bの内壁に反応部36kが形成された構成を備えている。 A plate-shaped biosensor 36 is also attached to the bottom wall portion 35 of the mounting body 30 so as to cover the recessed portion 35A in which the puncture body 31 is housed. As shown in FIGS. 6 to 8, the biosensor 36 communicates with the through hole 36a through which the puncture needle 31c of the puncture body 31 can pass, and communicates with the through hole 36a so that the thickness is parallel to the bottom wall portion 35. It is provided with a body fluid passage 36b extending to, and has a configuration in which a reaction portion 36k is formed on the inner wall of the body fluid passage 36b.

図9に示すように、たとえば0.2mmの厚みをもつ樹脂製絶縁シートからなる平面視長矩形状のベース板36Aが準備される。このベース板36Aにおいて電極が形成される面とは相対する平行面、すなわち皮膚当接面部分を図10に示す。図10に示すように、少なくとも貫通孔36aのごく近傍周辺部をあらかじめ疎水化処理を行って疎水部363aを形成してある。ここで言う、疎水化処理とは、水とのなじみを悪化させることである。ここで、疎水化処理するための化合物としては、樹脂製絶縁シートの表面を疎水化または撥水化できるものであれば特に限定されないが、例えばポリウレタン系樹脂、ポリアクリル系樹脂、ポリエステル系樹脂、ポリアミド系樹脂、ポリ塩化ビニル系樹脂、ポリスチレン系樹脂、フッ素系樹脂、その他ゴム変性物などが挙げられ、特に水溶性の樹脂とか吸湿性の高い樹脂でない限り、従来、インキのバインダーなどに使用されている公知の樹脂はいずれも使用することができる。また疎水化処理の方式としては、例えば上記樹脂を主成分とする液を所定の部分に浸透させた後乾燥させることによる印刷方式や撥水剤のコーティングなど公知の技術はいすれも使用することができる。このベース板36Aには、あらかじめたとえば1.5mm径の貫通孔36aが形成されている。このベース板36Aの上面には、グラファイトインクを用いたスクリーン印刷の手法により、作用極36cと対極36dとが膜状に形成される。作用極36cは、端子部となるべき端部領域36f(作用極36cに斜線のみを施した領域)から細状の突出部36gが延出形成された平面形態をもち、一方、対極36dは、端子部となるべき端部領域36h(対極36dに斜線のみを施した領域)から上記作用極36c側の突出部36gを両側から挟むように二股状に延びる突出部36i,36iをもつ平面形態をもっている。貫通孔36aは、対極36dの一方の突出部36iと近接して位置している。 As shown in FIG. 9, for example, a base plate 36A having a rectangular shape in a plan view made of a resin insulating sheet having a thickness of 0.2 mm is prepared. FIG. 10 shows a parallel surface of the base plate 36A opposite to the surface on which the electrodes are formed, that is, a skin contact surface portion. As shown in FIG. 10, at least the peripheral portion in the immediate vicinity of the through hole 36a is hydrophobized in advance to form the hydrophobic portion 363a . The hydrophobizing treatment referred to here is to deteriorate the compatibility with water. Here, the hydrophobic treatment to order the compound is not particularly limited as long as the surface of the resin insulating sheet can hydrophobic or water-repellent, for example, polyurethane resins, polyacrylic resins, polyester Examples thereof include resins, polyamide-based resins, polyvinyl chloride-based resins, polystyrene-based resins, fluorine-based resins, and other rubber-modified products. Unless particularly water-soluble resins or highly hygroscopic resins, conventional ink binders and the like have been used. Any known resin used can be used. Further, as a method of hydrophobizing, any known technique such as a printing method in which a liquid containing the above resin as a main component is permeated into a predetermined portion and then dried, or a coating of a water repellent agent can be used. it can. A through hole 36a having a diameter of, for example, 1.5 mm is formed in advance in the base plate 36A. On the upper surface of the base plate 36A, a working electrode 36c and a counter electrode 36d are formed in a film shape by a screen printing method using graphite ink. The working pole 36c has a planar shape in which a fine protrusion 36g extends from an end region 36f (a region where only the diagonal line is applied to the working pole 36c) to be a terminal portion, while the counter electrode 36d has a planar shape. It has a planar form having protrusions 36i and 36i extending in a bifurcated manner so as to sandwich the protrusion 36g on the working pole 36c side from the end region 36h (the region where only the counter electrode 36d is shaded) that should be the terminal portion. There is. The through hole 36a is located close to one of the protrusions 36i of the counter electrode 36d.

次に、図9に示したように各スペーサ板36B,36Bに重ねるようにして、上記ベース板36Aの貫通孔36aと対応する貫通孔362bを有する平面視矩形状のカバー板36Cを重ね合わせてこのバイオセンサ36が完成する。すなわち、図6ないし図8に表れているように、上記ベース板36Aとスペーサ板36B,36Bとで形成された凹溝36eをカバー板36Cで塞ぐことによって縦方向に延びる断面横長矩形状の体液通路36bが形成され、かつ、この体液通路36bの内面に、作用極36cおよび対極36dに接触する試薬層36k(反応部)が形成され、かつ、この体液通路36bはこの板状バイオセンサ36の貫通穴36aに連通させられることとなる。また、体液通路36bにおける貫通孔36aの位置と反対側は、開放させられており、後述するように貫通36aを介してこの体液通路36bないし反応部36kに毛管現象によって体液(血液)が導入されるのを促す。 Next, as shown in FIG. 9, the cover plate 36C having a rectangular shape in a plan view having the through hole 36a of the base plate 36A and the corresponding through hole 362b are overlapped with each other so as to be overlapped with the spacer plates 36B and 36B. This biosensor 36 is completed. That is, as shown in FIGS. 6 to 8, a body fluid having a horizontally long rectangular cross section extending in the vertical direction by closing the concave groove 36e formed by the base plate 36A and the spacer plates 36B and 36B with the cover plate 36C. A passage 36b is formed, and a reagent layer 36k (reaction part) in contact with the working electrode 36c and the counter electrode 36d is formed on the inner surface of the body fluid passage 36b, and the body fluid passage 36b is the plate-shaped biosensor 36 of the plate-shaped biosensor 36. It will be communicated with the through hole 36a. The position opposite to the transmembrane hole 36a that put the fluid passage 36b is allowed to open, fluid by capillary action to the fluid passage 36b through the reaction portion 36k through the through hole 36a as described later (blood ) Is introduced.

上記のように形成された板状バイオセンサ36は、図2に良く表れているように装着体30の底壁部35に、穿刺針31cの位置とバイオセンサ36の貫通36aの位置とが一致するようにして貼着される。なお、図4および図5に表れているように、装着体30の底壁部35には、バイオセンサ36のベース板36Aの両端部に露出する作用極36cおよび対極36d用の端子部36f,36hと対応する丸穴362c,362dが形成されている。この丸穴362c,362dは、装着体30を本体20に装着したときに、本体20側のコネクタピン25a,25aの先端を上記端子部36f,36hに接触させるためのものである。装着体30の底壁部35にはまた、バイオセンサ貼着領域を挟むようにして弓形の開口36m,36mが形成されている。 In the plate-shaped biosensor 36 formed as described above, as shown in FIG. 2, the position of the puncture needle 31c and the position of the through hole 36a of the biosensor 36 are located on the bottom wall portion 35 of the mounting body 30. It is attached so that it matches. As shown in FIGS. 4 and 5, the bottom wall portion 35 of the mounting body 30 has a working electrode 36c and a terminal portion 36f for the counter electrode 36d exposed at both ends of the base plate 36A of the biosensor 36. Round holes 362c and 362d corresponding to 36h are formed. The round holes 362c and 362d are for bringing the tips of the connector pins 25a and 25a on the main body 20 side into contact with the terminal portions 36f and 36h when the mounting body 30 is mounted on the main body 20. The bottom wall portion 35 of the mounting body 30 is also formed with bow-shaped openings 36 m and 36 m so as to sandwich the biosensor attachment region.

【0029】
【実施例2】
実施例1と同様の体液測定装置において、板状バイオセンサ36の作製工程における絶縁ベース板36Aの部分を以下に説明するように変更する。
[0029]
[Example 2]
In the same body fluid measuring device as in Example 1, the portion of the insulating base plate 36A in the manufacturing process of the plate-shaped biosensor 36 is changed as described below.

【0033】
【実施例3】
実施例1と同様の体液測定装置において、板状バイオセンサ36の作製工程における絶縁ベース板36Aの部分を以下に説明するように変更する。
0033
[Example 3]
In the same body fluid measuring device as in Example 1, the portion of the insulating base plate 36A in the manufacturing process of the plate-shaped biosensor 36 is changed as described below.

図9に示すように、たとえば0.2mmの厚みをもつ樹脂製絶縁シートからなる平面視長矩形状のベース板36Aが準備される。このベース板36Aには、あらかじめたとえば1.5mm径の貫通孔361aが形成されている。このベース板36Aにおいて電極が形成される面とは相対する平行面、すなわち皮膚当接面35aから見たベース板36Aの斜視図を図10に示す。図10に示すように、皮膚当接面35aには、貫通361aのごく近傍周辺部に、立体遮蔽物363aを配してある。ここでいう立体遮蔽物363aとは、例えばOリングなどで、傷から流出した血液の拡散を遮断することを目的としている。 As shown in FIG. 9, for example, a base plate 36A having a rectangular shape in a plan view made of a resin insulating sheet having a thickness of 0.2 mm is prepared. A through hole 361a having a diameter of, for example, 1.5 mm is formed in advance in the base plate 36A. FIG. 10 shows a perspective view of the base plate 36A as seen from a parallel surface of the base plate 36A facing the surface on which the electrodes are formed, that is, a skin contact surface 35a. As shown in FIG. 10, on the skin contact surface 35a , a three-dimensional shield 363a is arranged in the vicinity of the through hole 361a in the immediate vicinity. The three-dimensional shield 363a referred to here is intended to block the diffusion of blood flowing out of a wound, for example, with an O-ring or the like.

【0037】
【発明の効果】
このように本発明によれば、上記体液測定装置10を用いて、装着体30のおよびバイオセンサ36の皮膚当接面35aを患者の指先や耳たぶ等に押し当てた状態を保持しつつ、穿刺針31cを突出させるという操作をおこなうと、体液が皮膚とバイオセンサ36の隙間に入り込むことなく、血糖値等の体液測定を適切に行うことができる。
0037
【Effect of the invention】
As described above, according to the present invention, the body fluid measuring device 10 is used to maintain the state in which the end surface of the wearing body 30 and the skin contact surface 35a of the biosensor 36 are pressed against the fingertips, ear pads, etc. of the patient. By performing the operation of projecting the puncture needle 31c, the body fluid such as the blood glucose level can be appropriately measured without the body fluid entering the gap between the skin and the biosensor 36.

【図面の簡単な説明】
【図1】
本願発明に係る体液測定装置の全体外観図である。
【図2】
穿刺体が退避した状態における装着体の詳細を示す拡大縦断面図であり、図4のII−II線に沿う断面に相当する図である。
【図3】
穿刺体が進出した状態における装着体の詳細を示す拡大縦断面図である。
【図4】
装着体の底面図である。
【図5】
バイオセンサを外した状態での装着体の底面図である。
【図6】
バイオセンサの平面図である。
【図7】
図6のVII
−VII 線に沿う断面図である。
【図8】
図7における一点鎖線で囲まれた領域の拡大図である。
【図9】
バイオセンサの分解斜視図である。
【図10】
バイオセンサ皮膚当接面側から見た斜視図である。
【符号の説明】
10 体液測定装置
20 本体
23 押圧部(駆動機構を構成する)
25a コネクタピン(本体の端子としての)
30 装着体
31 穿刺体
32 押圧ロッド(駆動機構を構成する)
35a 皮膚当接面
36 バイオセンサ
36a 貫通孔(バイオセンサの)
36f,36h 端子部(センサの電極としての)
361a 貫通孔(皮膚当接面の)
363a 疎水部
[Simple explanation of drawings]
FIG. 1
It is an overall external view of the body fluid measuring apparatus which concerns on this invention.
FIG. 2
It is an enlarged vertical cross-sectional view which shows the detail of the wearing body in the state where the puncture body is retracted, and is the figure corresponding to the cross section along the line II-II of FIG.
FIG. 3
It is an enlarged vertical sectional view which shows the detail of the wearing body in the state where the puncture body is advanced.
FIG. 4
It is a bottom view of the wearing body.
FIG. 5
It is the bottom view of the wearing body with the biosensor removed.
FIG. 6
It is a top view of a biosensor.
FIG. 7
VII in Figure 6
It is a cross-sectional view along the −VII line.
FIG. 8
It is an enlarged view of the region surrounded by the alternate long and short dash line in FIG. 7.
FIG. 9
It is an exploded perspective view of a biosensor.
FIG. 10
It is a perspective view which looked at the biosensor from the skin contact surface side.
[Explanation of symbols]
10 Body fluid measuring device 20 Main body 23 Pressing part (constituting a drive mechanism)
25a connector pin (as a terminal on the main unit)
30 Mounting body 31 Puncture body 32 Pressing rod (constituting a drive mechanism)
35a Skin contact surface 36 Biosensor 36a Through hole (of biosensor)
36f, 36h terminal (as sensor electrode)
361a Through hole (on the skin contact surface)
363a Hydrophobic part

JP31402998A 1998-10-15 1998-10-15 Biosensor used in lancet-integrated body fluid measuring device Expired - Fee Related JP4166878B2 (en)

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JP2000116628A5 true JP2000116628A5 (en) 2005-12-02
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