KR20170066600A - 형광-조정 광전용적맥파 측정기를 사용한 조직 내의 절대적인 혈류의 정량화 - Google Patents
형광-조정 광전용적맥파 측정기를 사용한 조직 내의 절대적인 혈류의 정량화 Download PDFInfo
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Abstract
Description
도 1은 손가락 끝 센서가 맥박수, 혈액 산소 포화도 또는 이들 둘 다를 측정하기 위해 사용되는 종래의 광전용적맥파 측정기 (PPG)의 사용을 개략적으로 도시하고;
도 2는 실시예에 따른, 혈액에서 염료의 몰 농도가 증가함에 따라 보다 긴 파장들로 이동하는 인도시아닌그린 (ICG) 염료의 형광 방출 스펙트럼을 도시하고;
도 3은 제 1 세기 및 제 2 세기 중 하나가 농도에 따라 단조롭게 변화하고, 제 1 세기 및 제 2 세기 중 하나가 농도에 따라 변화되지 않도록 제 1 및 제 2 스펙트럼 대역들이 선택되는 형광제의 형광 방출 스펙트럼에서 스펙트럼 이동을 이용함으로써, 혈액에서의 형광제의 순간 몰 농도가 결정되는 실시예를 도시하고;
도 4는 제 1 세기 및 제 2 세기가 농도에 따라 단조롭게 증가하지만 서로 다른 비율들로 증가하도록 제 1 및 제 2 스펙트럼 대역들이 선택되는 형광제의 형광 방출 스펙트럼에서 스펙트럼 이동을 이용함으로써, 혈액에서의 형광제의 순간 몰 농도가 결정되는 실시예를 도시하고;
도 5는 제 1 세기가 농도에 따라 단조롭게 증가하고 제 2 세기가 농도에 따라 단조롭게 감소하도록 제 1 및 제 2 스펙트럼 대역들이 선택되는 형광제의 형광 방출 스펙트럼에서 스펙트럼 이동을 이용함으로써, 혈액에서의 형광제의 순간 몰 농도가 결정되는 실시예를 도시하고;
도 6은 실시예에 따른, 조직 볼륨에서의 혈액량의 시변 변화를 측정하는 예시 장치를 도시하고;
도 7은 실시예에 따른 예시 조명 모듈을 도시하고;
도 8은 실시예에 따른 예시 형광 방출 획득 모듈을 도시하고;
도 9는 약 820 내지 약 840 nm (여기서 "SWL"은 단 파장을 나타냄)의 범위의 제 1 스펙트럼 대역으로부터의 그리고 약 840 nm 내지 약 900 nm (여기서 "LWL"은 장 파장을 나타냄)의 제 2 스펙트럼 대역으로부터의 ICG 형광 세기들의 비율과 ICG의 순간 몰 농도 사이의 예시 관계를 도시하며; 그리고
도 10은 도 6의 장치의 형광제의 형광 여기를 위한 여기 수단의 대안 실시예를 도시한다.
Claims (21)
- 조직 볼륨 내의 혈액량의 시변 변화 (time-varying change)를 측정하는 장치에 있어서,
상기 혈액 내의 형광제 (fluorescence agent)를 여기시키는 여기 수단;
상기 조직 볼륨을 통하여 상기 혈액의 박동 흐름 동안에 시변 광 세기 신호를 획득하는 획득 수단 - 상기 박동 흐름은 종래의 광전용적맥파 (photoplethysmogram)와 유사한 이완기 및 수축기를 가짐; 및
상기 조직 볼륨 내의 혈액량의 시변 변화의 측정치를 얻기 위해 상기 획득된 시변 광 세기 신호를 프로세싱하는 프로세싱 수단;을 포함하며,
변형된 비어-램버트 법칙은:
ΔL = ln[(Ie Φ - Im / Ie Φ - Ip)](εC)-1
을 얻기 위해 상기 이완기 및 수축기에 적용되고,
여기에서:
ΔL은 주어진 조직 볼륨 내의 총 혈액 층 (aggregate blood layer) 두께의 변화이고,
Ie는 상기 혈액 내의 형광제를 여기시키는 여기 광의 세기이고,
Φ는 상기 형광제의 양자 효율이고,
Im은 상기 조직 볼륨을 통하여 상기 혈액의 박동 흐름의 이완기 최소 동안에 상기 시변 광 세기 신호의 세기이고,
Ip는 상기 조직 볼륨을 통하여 상기 혈액의 박동 흐름의 수축기 최대 동안에 상기 시변 광 세기 신호의 세기이고,
ε는 상기 형광제에 대한 몰 흡수 계수이며,
C는 상기 혈액 내의 형광제의 순간 몰 농도인, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치. - 청구항 1에 있어서,
상기 여기 수단은, 형광 여기 소스를 포함한 조명 모듈을 포함하고,
상기 형광 여기 소스는 상기 형광제를 여기시키기에 적합한 세기 및 적합한 파장을 가진 여기 광을 발생시키도록 동작 가능하게 구성되는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치. - 청구항 2에 있어서,
상기 형광 여기 소스는 제 1 여기 소스 및 제 2 여기 소스을 포함하는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치. - 청구항 2 또는 청구항 3에 있어서,
상기 조명 모듈은, 상기 피험자의 조직 볼륨을 포함한 관심 영역에 걸쳐 상기 여기 광의 균일한 필드를 제공하기 위해, 상기 조명 모듈에서 빠져나가는 여기 광을 형상화 및 안내하도록 동작 가능하게 구성된 광학 요소를 더 포함하는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치. - 청구항 4에 있어서,
상기 광학 요소는 렌즈, 광 가이드, 회절 요소, 또는 이들의 조합을 포함하는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치. - 청구항 1 내지 청구항 5 중 어느 한 항에 있어서,
상기 획득 수단은 이미지 센서를 포함하는 형광 방출 획득 모듈을 포함하는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치. - 청구항 6에 있어서,
상기 형광 방출 획득 모듈은 상기 형광제에 의해 생성된 시변 광 세기 신호를 상기 이미지 센서에 캡쳐, 필터 및 유도하도록 동작 가능하게 구성된 이미지 센서 앞에 배치된 광학 요소를 더 포함하는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치. - 청구항 1 내지 청구항 7 중 어느 한 항에 있어서,
상기 프로세싱 수단은 프로세서 모듈을 포함하고, 상기 프로세서 모듈은 상기 형광제로 하여금 상기 시변 광 세기 신호를 생성하도록 하는 수단의 동작을 제어하고, 상기 시변 광 세기 신호를 획득하도록 하는 수단의 동작을 제어하고, 또는 상기 동작들의 조합을 제어하도록 동작 가능하게 구성되는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치. - 조직 볼륨 내의 혈액량의 시변 변화를 측정하는 키트에 있어서,
상기 키트는 청구항 1 내지 청구항 8 중 어느 한 항에 따른 조직 볼륨 내의 혈액량의 시변 변화 측정 장치, 및 형광제를 포함하는, 조직 볼륨 내의 혈액량의 시변 변화 측정 키트. - 조직 볼륨 내의 혈액량의 시변 변화를 측정하는 방법에 있어서,
상기 혈액 내의 형광제를 여기시키는 단계;
상기 조직 볼륨을 통하여 상기 혈액의 박동 흐름 동안에 시변 광 세기 신호를 획득하는 단계 - 상기 박동 흐름은 종래의 광전용적맥파와 유사한 이완기 및 수축기를 가짐; 및
상기 조직 볼륨 내의 혈액량의 시변 변화의 측정치를 얻기 위해 상기 획득된 시변 광 세기 신호를 프로세싱하는 단계를 포함하며,
변형된 비어-램버트 법칙은:
ΔL = ln[(Ie Φ - Im / Ie Φ - Ip)](εC)-1
을 얻기 위해 상기 이완기 및 수축기에 적용되고,
여기에서:
ΔL은 주어진 조직 볼륨 내의 총 혈액 층 두께의 변화이고,
Ie는 상기 혈액 내의 형광제를 여기시키는 여기 광의 세기이고,
Φ는 상기 형광제의 양자 효율이고,
Im은 상기 조직 볼륨을 통하여 상기 혈액의 박동 흐름의 이완기 최소 동안에 상기 시변 광 세기 신호의 세기이고,
Ip는 상기 조직 볼륨을 통하여 상기 혈액의 박동 흐름의 수축기 최대 동안에 상기 시변 광 세기 신호의 세기이고,
ε는 상기 형광제에 대한 몰 흡수 계수이며,
C는 상기 혈액 내의 형광제의 순간 몰 농도인, 조직 볼륨 내의 혈액량의 시변 변화 측정 방법. - 청구항 10 또는 청구항 1 내지 청구항 8 중 어느 한 항 또는 청구항 9에 있어서,
C는 상기 형광제의 형광 방출 스펙트럼에서 농도-조정 변화를 활용함으로써 결정되는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치 또는 방법 또는 키트. - 청구항 11에 있어서,
상기 농도-조정 변화는 상기 형광제의 형광 방출 스펙트럼에 스펙트럼 이동 (spectral shift)을 포함하는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치 또는 방법 또는 키트. - 청구항 11 또는 청구항 12에 있어서,
상기 활용하는 단계는:
상기 형광제의 형광 방출 스펙트럼의 제 1 및 제 2 스펙트럼 대역들을 선택하는 단계;
상기 제 1 및 제 2 스펙트럼 대역들 각각 내의 파장들에 걸쳐 적분된 형광 방출의 제 1 및 제 2 세기들을 획득하는 단계;
상기 제 1 및 제 2 세기들의 비율을 계산하는 단계; 및
상기 비율로부터 C에 대한 값을 도출하는 단계;를 포함하는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치 또는 방법 또는 키트. - 청구항 13에 있어서,
상기 제 1 및 제 2 스펙트럼 대역들은:
(i) 상기 제 1 및 제 2 세기들 중 하나가 C에 따라 단조롭게 변화되고, 상기 제 1 및 제 2 세기들 중 하나가 C에 따라 변화되지 않도록;
(ii) 상기 제 1 및 제 2 세기들이 C에 따라 단조롭게 증가되지만 서로 다른 비율로 증가되도록; 또는
(iii) 상기 제 1 세기가 C에 따라 단조롭게 증가되고, 상기 제 2 세기는 C에 따라 단조롭게 감소되도록, 선택되는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치 또는 방법 또는 키트. - 청구항 13 또는 청구항 14에 있어서,
상기 제 1 스펙트럼 대역은 약 780 nm 내지 약 835 nm, 또는 이들의 하위 세트의 범위의 파장들을 포함하며, 그리고 상기 제 2 스펙트럼 대역은 약 835 nm 내지 약 1000 nm, 또는 이들의 하위 세트의 범위의 파장들을 포함하는, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치 또는 방법 또는 키트. - 청구항 1 내지 청구항 8 중 어느 한 항, 청구항 9 또는 청구항 10 내지 청구항 15 중 어느 한 항에 있어서,
상기 형광제는 인도시아닌그린 (indocyanine green, ICG)인, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치 또는 방법 또는 키트. - 청구항 16에 있어서,
상기 C의 범위는 약 2 μM 내지 약 10 mM인, 조직 볼륨 내의 혈액량의 시변 변화 측정 장치 또는 방법 또는 키트. - 피험자의 조직 볼륨 내의 혈액량의 시변 변화를 측정하는 방법에 사용되는 형광제에 있어서, 상기 방법은:
상기 혈액 내의 형광제를 여기시키는 단계;
상기 조직 볼륨을 통하여 상기 혈액의 박동 흐름 동안에 시변 광 세기 신호를 획득하는 단계 - 상기 박동 흐름은 종래의 광전용적맥파와 유사한 이완기 및 수축기를 가짐; 및
상기 조직 볼륨 내의 혈액량의 시변 변화의 측정치를 얻기 위해 상기 획득된 시변 광 세기 신호를 프로세싱하는 단계를 포함하며,
변형된 비어-램버트 법칙은:
ΔL = ln[(Ie Φ - Im / Ie Φ - Ip)](εC)-1
을 얻기 위해 상기 이완기 및 수축기에 적용되고,
여기에서:
ΔL은 주어진 조직 볼륨 내의 총 혈액 층 두께의 변화이고,
Ie는 상기 혈액 내의 형광제를 여기시키는 여기 광의 세기이고,
Φ는 상기 형광제의 양자 효율이고,
Im은 상기 조직 볼륨을 통하여 상기 혈액의 박동 흐름의 이완기 최소 동안에 상기 시변 광 세기 신호의 세기이고,
Ip는 상기 조직 볼륨을 통하여 상기 혈액의 박동 흐름의 수축기 최대 동안에 상기 시변 광 세기 신호의 세기이고,
ε는 상기 형광제에 대한 몰 흡수 계수이며,
C는 상기 혈액 내의 형광제의 순간 몰 농도인, 형광제. - 청구항 18에 있어서,
상기 형광제는: 인도시아닌그린 (ICG); 플루오레세인 이소티오시아네이트 (fluorescein isothiocyanate); 로다민 (rhodamine), 피코에리트린 (phycoerythrin); 피코시아닌 (phycocyanin); 알로피코시아닌 (allophycocyanin); o-프탈데히드 (phthaldehyde); 플루오르카민 (fluorescamine); 로즈 벵골 (rose Bengal); 트리판 블루 (trypan blue); 플루오르-골드 (fluoro-gold)로 구성된 군으로부터 선택된, 하나 이상의 형광 염료들, 또는 이들의 유사체 또는 유도체를 포함하는, 형광제. - 청구항 18 또는 청구항 19에 있어서,
상기 방법은 상기 피험자에 상기 형광제를 투여하는 단계를 포함하는, 형광제. - 청구항 18 내지 청구항 20 중 어느 한 항에 있어서,
상기 방법은 상기 조직 볼륨 내의 혈액량의 시변 변화의 측정치를 생리학적 파라미터, 진단 파라미터, 병리학적 파라미터 또는 이들의 조합에 서로 관련시키는 단계를 더 포함하는, 형광제.
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| CN108882896B (zh) * | 2015-09-23 | 2022-05-27 | 史赛克欧洲运营有限公司 | 用于评定组织的治愈的方法和系统 |
| EP3416547A4 (en) * | 2016-02-16 | 2019-08-14 | Novadaq Technologies ULC | ASSESSMENT OF BLOOD FLOW AND TISSUE BLOODING BY FLUORESCENT-MEDIATED PHOTOPLETHYSMOGRAPHY |
| US9554738B1 (en) * | 2016-03-30 | 2017-01-31 | Zyomed Corp. | Spectroscopic tomography systems and methods for noninvasive detection and measurement of analytes using collision computing |
| CA3049922A1 (en) | 2017-02-10 | 2018-08-16 | Novadaq Technologies ULC | Open-field handheld fluorescence imaging systems and methods |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003144401A (ja) * | 2001-11-14 | 2003-05-20 | Shimadzu Corp | 血流測定装置 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11213216B2 (en) | 2018-07-13 | 2022-01-04 | Samsung Electronics Co., Ltd. | Apparatus and method for obtaining bioinformation |
| US12016667B2 (en) | 2018-07-13 | 2024-06-25 | Samsung Electronics Co., Ltd. | Apparatus and method for obtaining bio-information |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101955134B1 (ko) | 2019-03-06 |
| US20200323439A1 (en) | 2020-10-15 |
| EP3915467A1 (en) | 2021-12-01 |
| KR20190022940A (ko) | 2019-03-06 |
| JP6487544B2 (ja) | 2019-03-20 |
| EP3203902A4 (en) | 2018-06-20 |
| AU2014408488A1 (en) | 2017-04-20 |
| KR102012880B1 (ko) | 2019-08-22 |
| EP3203902A1 (en) | 2017-08-16 |
| CN107427247A (zh) | 2017-12-01 |
| AU2014408488B2 (en) | 2019-07-18 |
| CN107427247B (zh) | 2021-06-04 |
| CA2963450A1 (en) | 2016-04-14 |
| US20170303800A1 (en) | 2017-10-26 |
| JP2017534361A (ja) | 2017-11-24 |
| AU2019250179A1 (en) | 2019-11-07 |
| US12036011B2 (en) | 2024-07-16 |
| US10631746B2 (en) | 2020-04-28 |
| EP3203902B1 (en) | 2021-07-07 |
| WO2016055837A1 (en) | 2016-04-14 |
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