JP2021524034A - 微細流体装置内の事象のタイミングの制御方法とタイマー機能付き微細流体装置 - Google Patents
微細流体装置内の事象のタイミングの制御方法とタイマー機能付き微細流体装置 Download PDFInfo
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Abstract
Description
電池の場所:サンプル・パッド
PROS:電池からのエネルギは液体サンプルが添加された時点から生成される。
CONS:電池反応の副産物はアッセイの動作に影響する。
電池の場所:シンク・パッド
PROS:電池反応の副産物はアッセイの動作に影響しない。電池は液体サンプルがパッドに達した時点で信号を発する。アッセイ内に組み込み易い。
CONS:電池内のサンプルの流速と充填時間は、アッセイ膜の材料で制限される。
電池の場所:裏面
PROS:アッセイと干渉しない。アッセイから独立して製造され、最終組立時に組み合わされる。電池はアッセイの全長を利用する。
CONS:組み込む費用が高い。
電池の場所:並列
PROS:電池はアッセイから完全に独立して製造される。電池の製造に際し設計の制約が少ない。
CONS:電池は後でアッセイに接続しなければならない。その結果製造費が上がる。
*放電負荷の手段により変更できる。電池12に加えられる受動電気負荷(抵抗)又は能動電気負荷(回路又は他の要素)の値は、電流を決定する。それ故、電池12の放電速度を決定する。電池12の放電カーブは、放電負荷の値に影響される。その結果、電池12の放電時間は、放電負荷の公称値を減らすこと(即ち電流を増やすこと)により、減らすことができる。
10:ラテラル・フロー・検査片
11:サンプル・パッド
12:電池
13:紙片
14:導電性トラック
15:放電負荷
16:補助装置
Claims (15)
- 微細流体装置内の事象のタイミングを制御する方法において、
(A)所定量の流体を微細流体装置の第1端に第1時点(t0)で添加するステップと、
前記流体は、毛細管現象により微細流体装置の第2端の方向に流れ、
(B)前記微細流体装置内のペーパー・ベースの電池(12)が、第2時点(tstart)から第3時点(tend)までの間、前記電池(12)に接続された補助装置(16)に供給されるエネルギーを生成するステップと、
前記電池(12)は、流体の添加により活性化し、少なくとも2つの電極である酸化アノードと還元カソードに接触するよう配置された紙部分を有し、
前記第2時点(tstart)は、前記電池(12)が流体で濡れた時点に対応し、
前記第3時点(tend)は、前記電池(12)が放電が完了した時点に対応し、
(C)前記電池(12)が、動作期間(toperation)の間のみ、前記補助装置(16)の選択的な活性化と非活性化を含む事象の持続を、制御するステップと、
を有し、
前記動作期間(toperation)は、オン時点(ton)とオフ時点(toff)の間に含まれ、
前記オン時点(ton)は、前記電池(12)の出力電圧がしきい値電圧(Vthreshold)以上になった時点であり、
前記オフ時点(toff)は、前記電池(12)の出力電圧がしきい値電圧(Vthreshold)以下になった時点であり、
前記動作期間(toperation)の調整は、前記電池(12)の活性領域を変更すること、前記電池(12)のアノードの厚さを変更することのいずれか又は両方で、行われる
ことを特徴とする微細流体装置内の事象タイミングを制御する方法。 - 前記酸化アノードは、レドックス種(redox species)、金属、合金、ポリマーのいずれかを含み、前記還元カソードは、空気呼吸カソード、レドックス種、金属、合金、ポリマーのいずれかを含む
ことを特徴とする請求項1記載の方法。 - 前記微細流体装置は、微細流体分析装置を含み、
前記微細流体分析装置は、ラテラル・フロー・アッセイ装置を含み、
前記ラテラル・フロー・アッセイ装置は、前記第1端に配置されるサンプル・パッド(11)とラテラル・フロー・検査片(10)とを有し、
流体サンプルを含む流体が、前記ラテラル・フロー・検査片(10)を介して毛細管現象により、流れる
ことを特徴とする請求項1又は2に記載の方法。 - 前記補助装置(16)は、前記動作期間(toperation)の間で活性状態にある時は、アッセイの結果を採らなければならない有効時間を示す
ことを特徴とする請求項1−3のいずれかに記載の方法。 - 前記動作期間(toperation)の調整は、放電負荷(15)を前記電池(12)に接続することにより、行われる
ことを特徴とする請求項1又は2に記載の方法。 - (D)所定のエネルギーレベルに達した時に、前記電池(12)のエネルギの分配をオン/オフに切り替える電気回路を用いるステップ
を更に含む
ことを特徴とする請求項1又は5に記載の方法。 - 前記第1時点(t0)と前記動作期間(toperation)の間に、調整可能な遅延時間(tdelay)を有する
ことを特徴とする請求項1記載の方法。 - タイマー機能付きの微細流体装置において、
(A1)第1時点(t0)で所定量の流体を受け入れる第1端と、
(A2)前記流体が毛細管現象で流れる方向にある第2端と、
(B)ペーパー・ベースの電池(12)と、
を有し、
前記電池(12)は、流体の添加により活性化し、少なくとも2つの電極である酸化アノードと還元カソードに接触するよう配置されたペーパー部分を有し、第2時点(tstart)から第3時点(tend)までの間、前記電池(12)に接続された補助装置(16)に供給するエネルギーを生成し、
前記第2時点(tstart)は、前記電池(12)が流体で濡れた時点に対応し、
前記第3時点(tend)は、前記電池(12)が放電が完了した時点に対応し、
前記電池(12)は、動作期間(toperation)の間のみ、前記電池(12)に接続された補助装置(16)の選択的な活性化と非活性化を含む事象の持続を制御し、
前記動作期間(toperation)は、オン時点(ton)とオフ時点(toff)の間に含まれ、
前記オン時点(ton)は、前記電池(12)の出力電圧がしきい値電圧(Vthreshold)以上になった時点であり、
前記オフ時点(toff)は、前記電池(12)の出力電圧がしきい値電圧(Vthreshold)以下になった時点であり、
前記電池(12)は、前記電池(12)の活性領域を変更すること、前記電池(12)のアノードの厚さを変更することのいずれか又は両方を行うことができる
ことを特徴とするタイマー機能付きの微細流体装置。 - 前記酸化アノードは、レドックス種、金属、合金、ポリマーのいずれかを含み、前記還元カソードは、空気呼吸カソード、レドックス種、金属、合金、ポリマーのいずれかを含む
ことを特徴とする請求項8記載の微細流体装置。 - 前記微細流体装置は、微細流体分析装置を含み、
前記微細流体分析装置は、ラテラル・フロー・アッセイ装置を含み、
前記ラテラル・フロー・アッセイ装置は、前記第1端に配置されるサンプル・パッド(11)とラテラル・フロー・検査片(10)とを有し、
流体サンプルを含む流体が、前記ラテラル・フロー・検査片(10)を介して毛細管現象により、流れる
ことを特徴とする請求項8又は9に記載の微細流体装置。 - 前記補助装置(16)は、発光システムとオーディオ・システム又は無線周波数信号送信装置を有し、前記発光システムは、発光ダイオードLEDを含み、前記オーディオ・システムは、音声スピーカー、ブザー、アラームのいずれかを含む
ことを特徴とする請求項8−10のいずれかに記載の微細流体装置。 - 前記補助装置(16)は、前記動作期間(toperation)の間、検査結果を見ることのできるよう開くウインドウを有し、その後閉じ、
前記ウインドウは、機械式ウインドウ、液晶分散フィルム、エレクトロクロミック・フィルムのいずれかを含む
ことを特徴とする請求項8−10のいずれかに記載の微細流体装置。 - 前記補助装置(16)は、ヒーターを有し、前記ヒーターは、所定の温度まで前記動作期間(toperation)の間、加熱される
ことを特徴とする請求項8−10のいずれかに記載の微細流体装置。 - 前記微細流体装置は、容器(1)内に配置されている
ことを特徴とする請求項10記載の微細流体装置。 - 前記ラテラル・フロー・検査片(10)と共働する複数の追加装置を更に有し、前記追加装置は、放電負荷、抵抗、デジタル回路、アナログ回路、スイッチのいずれかを含む
ことを特徴とする請求項14記載の微細流体装置。
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US6217744B1 (en) * | 1998-12-18 | 2001-04-17 | Peter Crosby | Devices for testing fluid |
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