JP5670576B2 - 携帯型医療機器用の電力管理 - Google Patents
携帯型医療機器用の電力管理 Download PDFInfo
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- JP5670576B2 JP5670576B2 JP2013533211A JP2013533211A JP5670576B2 JP 5670576 B2 JP5670576 B2 JP 5670576B2 JP 2013533211 A JP2013533211 A JP 2013533211A JP 2013533211 A JP2013533211 A JP 2013533211A JP 5670576 B2 JP5670576 B2 JP 5670576B2
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- A61B5/14532—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring glucose, e.g. by tissue impedance measurement
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Description
携帯型糖尿病管理装置の内部温度を感知する温度センサと、
血液試料を受け取るための反応位置を有する取り外し可能な測定ストリップを外部で受け取るポートと、
内部温度に基づいて反応位置の直ぐ近くの周囲温度を予測するために熱的モデルを使用する熱的モデリングモジュールと、
その反応位置の直ぐ近くの周囲温度が閾値温度を超えるときに、携帯型糖尿病管理装置の1つまたは2つ以上の構成要素を非活性化する電力管理モジュール
とを含んでいる。
医療機器の内部温度を感知する温度センサと、
患者のヘルスパラメータ(health parameter)を測定するための物質の試料を受け取るための反応位置を有する取り外し可能な測定ストリップを外部で受け取るポートと、
内部温度に基づいて、例えば、反応位置の直ぐ近くの周囲温度を予測するために熱的モデルを使用する熱的モデリングモジュールと、
反応位置の直ぐ近くの周囲温度が第1の閾値温度を上回るか、および/または第2の閾値温度を下回るときに、医療機器の1つまたは2つ以上の構成要素を非活性化する電力管理モジュール
とを含んでいる。
1≦i≦Naならば、Ai≧0、i>Naならば、Ai=0およびNa≦N、
1≦i≦Nbならば、Bi≧0、i>Nbならば、Bi=0およびNb≦N
などとなる。従って、選択される間隔数の上限Nが十分に大きくなるために、1つ1つの熱源に対するインパルス応答の行列が、最小の切り捨てによるロスで特徴付けられる。
1)装置が、その環境との平衡温度になるようにする。周囲温度が参照温度であり、Tref=Tambである。
2)(N/2)×Δtの持続時間の間、一定の強度Qxで熱源「X」がアクティブにされる。ここで、NおよびΔtは上述のような方法で選択されている(つまり、N≧max{Na、Nb、・・・}で、Δtは適切なインパルス間隔である)。熱源がアクティブになる時間における温度センサの初期温度と、その後のそれぞれの時間ti=i×Δt(i=1からN/2まで)における温度とが記録される。
3)時間t=(N/2)×Δtで、熱源「X」が非アクティブにされ、時間ti=i×Δt(i=(N/2)+1からNまで)でセンサ温度の記録が継続される。
4)それぞれの時間ステップで温度上昇が計算される。
Exi=(Txi−Tref)、ここで、0≦i≦N
5)行列の方法を使って、インパルス温度応答の行列[Xi]が決定される。
Qx×[U]×[X]=[Ex]
[X]=(l/Qx)×[U]-1×[Ex]
6)対象となるそれぞれの熱源について上記方法が繰り返される。
[Qk]=[Qk,1 Qk,2 ・・・Qk,N-1 Qk,N]
ここで、熱インパルスの大きさは、
Qk,1が時間t=−N×Δtのときの大きさ、
Qk,2が時間t=−(N−1)×Δtのときの大きさ、
・・・
Qk,N-1が時間t=−2×Δtのときの大きさ、
Qk,Nが時間t=−1×Δtのときの大きさ
によって与えられる。
熱源kからの、この一連のインパルスによる温度上昇Ekは、
M個の熱源による全温度上昇は、
Tcorr=Tsensor−Etotal
Claims (10)
- 携帯型医療機器(104)の電力消費を管理するシステムであって、前記システムは、
前記携帯型医療機器(104)の内部温度を感知する温度センサ(605)、
患者のヘルスパラメータを測定するための物質の血液試料を受け取るための反応位置を有する取り外し可能な測定ストリップを受け取るポート、
前記血液試料中の血中グルコースを測定する血中グルコース測定モジュール(400)であって該血中グルコース測定モジュール(400)の作業の状態を示すステータス信号を生成する血中グルコース測定モジュール(400)、
前記内部温度に基づいて前記反応位置の直ぐ近くの周囲温度を予測するために熱的モデルを使用する熱的モデリングモジュール(602)、および
前記周囲温度が閾値温度を超えるときに前記携帯型医療機器(104)の1つまたは2つ以上の構成要素を非活性化するように適合される電力管理モジュール(600)
を含んでおり、前記1つまたは2つ以上の構成要素が、
第1の通信プロトコルを使って前記携帯型医療機器(104)の外部の第1の装置と通信する第1の通信モジュール(502)と、
第2の通信プロトコルを使って無線通信リンクを介して前記携帯型医療機器(104)の外部の第2の装置と通信する第2の通信モジュール(504)
とを含み、
前記第1の装置が患者と関連付けられる第1の機能を実行し、該第1の機能が第1の優先度を有しており、
前記第2の装置が前記患者と関連付けられる第2の機能を実行し、該第2の機能が前記第1の優先度よりも低い第2の優先度を有しており、
前記電力管理モジュール(600)が、前記第1の通信モジュール(502)を非活性化する前に前記第2の通信モジュール(504)を非活性化するように適合されるシステム。 - 前記医療機器(104)が糖尿病管理装置である請求項1記載のシステム。
- 前記第1の装置が前記患者にインスリンを投与するインスリン注入ポンプ(204)を含み、前記第2の装置が前記患者のグルコースレベルを監視する持続グルコースモニター(200)を含む請求項1記載のシステム。
- 前記1つまたは2つ以上の構成要素に電力を供給する電力源をさらに含んでおり、
前記熱的モデリングモジュールが、前記1つまたは2つ以上の構成要素に供給される電力に基づいて前記周囲温度を予測するように適合される請求項1記載のシステム。 - 前記電力源が電池(610)である請求項4記載のシステム。
- 前記電池(610)の残存容量を予測するヒューエルゲージモジュール(616)をさらに含んでおり、
前記電力管理モジュール(600)が、前記電池(610)の残存容量および前記携帯型医療機器(104)の内部温度に基づいて前記1つまたは2つ以上の構成要素を非活性化するように適合される請求項5記載のシステム。 - 前記電力管理モジュール(600)が、さらに、前記携帯型医療機器(104)の前記内部温度が閾値温度を超えるときに前記血中グルコース測定モジュール(400)の前記作業の状態に基づいて前記1つまたは2つ以上の構成要素を非活性化するように適合され、
前記携帯型医療機器(104)の前記1つまたは2つ以上の構成要素を非活性化することが、前記血中グルコース測定モジュール(400)を非活性化することを含む請求項1記載のシステム。 - 前記温度センサ(605)が、前記携帯型医療機器(104)内の複数の位置で温度を感知する温度感知モジュール(604)に関連付けられ、
前記熱的モデリングモジュール(602)が、これら感知された温度に基づいて周囲温度および内部温度の変化率を予測するように適合され、
前記電力管理モジュール(600)が、前記周囲温度および前記内部温度の変化率に基づいて前記1つまたは2つ以上の構成要素を非活性化するように適合される請求項1記載のシステム。 - 前記1つまたは2つ以上の構成要素の使用法を監視する使用監視モジュール(606)をさらに含んでおり、
前記電力管理モジュール(600)が、前記携帯型医療機器(104)の前記1つまたは2つ以上の構成要素の使用法に基づいて前記1つまたは2つ以上の構成要素を非活性化する請求項1記載のシステム。 - 前記1つまたは2つ以上の構成要素に電力を供給する電池(610)の残存容量を測定するヒューエルゲージモジュール(616)をさらに含んでおり、
前記電力管理モジュール(600)が、(i)使用法および前記電池(610)の残存容量に基づいて前記携帯型医療機器(104)の残りの稼動時間を予測するように、かつ、(ii)前記予測に基づいて前記1つまたは2つ以上の構成要素を非活性化するように適合される請求項9記載のシステム。
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