KR100928225B1 - Endoscopic pH Measurement Catheter - Google Patents

Endoscopic pH Measurement Catheter Download PDF

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KR100928225B1
KR100928225B1 KR1020080000747A KR20080000747A KR100928225B1 KR 100928225 B1 KR100928225 B1 KR 100928225B1 KR 1020080000747 A KR1020080000747 A KR 1020080000747A KR 20080000747 A KR20080000747 A KR 20080000747A KR 100928225 B1 KR100928225 B1 KR 100928225B1
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South Korea
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catheter
isfet
circuit board
printed circuit
endoscope
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KR1020080000747A
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Korean (ko)
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KR20090075005A (en
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신규식
이대성
조남규
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전자부품연구원
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00017—Electrical control of surgical instruments
    • A61B2017/00022—Sensing or detecting at the treatment site
    • A61B2017/00026—Conductivity or impedance, e.g. of tissue
    • A61B2017/00035—Conductivity or impedance, e.g. of tissue pH
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/16—Details of sensor housings or probes; Details of structural supports for sensors
    • A61B2562/166—Details of sensor housings or probes; Details of structural supports for sensors the sensor is mounted on a specially adapted printed circuit board
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3324—PH measuring means

Abstract

본 발명에 따른 내시경용 산도 측정 카테터는 내시경에 포함되는 카테터에 관한 것으로서, 더욱 자세하게는 내시경에 포함되는 카테터에 ISFET pH 센서를 구비시킴으로써 내시경의 이미지센서를 통해 획득한 체내 특정 위치에서의 pH 측정을 가능하게 하기 위한 내시경용 산도 측정 카테터에 관한 것이다.The endoscopy pH catheter according to the present invention relates to a catheter included in an endoscope, and more particularly, a pH measurement at a specific position in the body obtained through an image sensor of an endoscope by providing an ISFET pH sensor to a catheter included in an endoscope. To an endoscopy acid catheter for the purpose of enabling this.

본 발명의 내시경용 산도 측정 카테터는 내시경용 카테터에 있어서, 인쇄회로기판; 상기 인쇄회로기판의 일측면에 구비되며, pH를 측정하기 위한 ISFET; 상기 인쇄회로기판의 타측면에 구비되며, 상기 ISFET의 온도의존성 보상을 위한 온도보상부; 상기 인쇄회로기판의 타측에 구비되며, 상기 ISFET의 구동을 위한 기준전극; 상기 인쇄회로기판, ISFET, 기준전극 및 온도보상부를 실장하며, 상기 ISFET측에 제1개구부가 형성되고, 상기 기준전극측에 제2개구부가 형성된 카테터하우징; 상기 제2개구부에 구비되며, 접촉되는 pH 측정 대상물의 이온 유입을 위한 이온투과부; 및 상기 카테터하우징 내부 중 상기 인쇄회로기판과 이온투과부 사이에 구비되는 기준전극용 기준용액을 포함한다.An endoscope catheter for acidity measurement of the present invention, the endoscope catheter, Printed circuit board; An ISFET provided on one side of the printed circuit board and configured to measure pH; A temperature compensator provided on the other side of the printed circuit board and configured to compensate for temperature dependence of the ISFET; A reference electrode provided on the other side of the printed circuit board and configured to drive the ISFET; A catheter housing for mounting the printed circuit board, the ISFET, the reference electrode, and the temperature compensation unit, wherein a first opening is formed at the side of the ISFET, and a second opening is formed at the side of the reference electrode; An ion permeation part provided in the second opening part and configured to introduce ions of a pH measuring object into contact; And a reference solution for the reference electrode provided between the printed circuit board and the ion permeable part in the catheter housing.

Description

내시경용 산도 측정 카테터{pH sensing catheter in endoscope}PH sensing catheter in endoscope

본 발명에 따른 내시경용 산도 측정 카테터는 내시경에 포함되는 카테터에 관한 것으로서, 더욱 자세하게는 내시경에 포함되는 카테터에 ISFET pH 센서를 구비시킴으로써 내시경의 이미지센서를 통해 획득한 체내 특정 위치에서의 pH 측정을 가능하게 하기 위한 내시경용 산도 측정 카테터에 관한 것이다.The endoscopy pH catheter according to the present invention relates to a catheter included in an endoscope, and more particularly, a pH measurement at a specific position in the body obtained through an image sensor of an endoscope by providing an ISFET pH sensor to a catheter included in an endoscope. To an endoscopy acid catheter for the purpose of enabling this.

카테터(catheter)는 체내로부터 소정 물질을 제거하거나, 소정 물질을 투입하기 위해 사용되는 기구이다.A catheter is a device used to remove certain substances from or inject certain substances from the body.

일반적으로 이러한 카테터는 내시경에 포함되어 사용되고 있다. 즉, 일반적인 내시경은 체내를 촬영하기 위한 이미지센서와, 촬영부위 등 체내 소정 부위를 비추기 위한 발광부, 및 체내로부터의 물질 제거 또는 물질 투입을 위한 카테터를 포함한다.Generally, such a catheter is used in an endoscope. That is, a general endoscope includes an image sensor for photographing the body, a light emitting part for illuminating a predetermined part of the body such as a photographing site, and a catheter for removing or injecting a substance from the body.

한편, 이온감지 전계효과 트랜지스터(ISFET, Ion Sensitive Field Effect Transistor)는 ISE와 MIS 전계효과 트랜지스터(MISFET, Metal-Insular- Semiconductor FET)를 결합하여 만든 반도체 이온센서이다. 종래 ISE의 이온감지 및 선택성을 살리고 FET의 장점을 조화있게 살려서 소형으로 개발된 것이다.On the other hand, Ion Sensitive Field Effect Transistors (ISFETs) are semiconductor ion sensors made of a combination of ISE and MIS Field Metal Transistors (MISFET). It is developed compactly by utilizing the ion sensing and selectivity of the conventional ISE and harmonizing the advantages of the FET.

이러한 ISFET는 의료진단용, 환경관리용, 정밀시험분석용, 산업공정제어 및 계측용 등 다양한 분야에 응용되고 있다.The ISFET is applied to various fields such as medical diagnosis, environmental management, precision test analysis, industrial process control and measurement.

특히, ISFET를 바이오센서에 활용할 경우, 기준전극 문제를 해결할 수 있고, ISFET의 장점을 그대로 살릴 수 있어, 가스센서, 압력센서, 온도센서, 습도센서, pH 센서 등의 기본소자로 활용된다.In particular, when the ISFET is used in a biosensor, the problem of the reference electrode can be solved, and the advantages of the ISFET can be used as it is, and it is used as a basic device such as a gas sensor, a pressure sensor, a temperature sensor, a humidity sensor, and a pH sensor.

본 발명은 내시경의 이미지센서를 통해 체내를 촬영하면서 촬영되는 소정 위치에서의 산도 측정이 가능한 내시경용 산도 측정 카테터를 제공함에 목적이 있다.An object of the present invention is to provide an endoscopy pH measuring catheter capable of measuring the acidity at a predetermined position taken while photographing the body through the image sensor of the endoscope.

본 발명의 상기 목적은 내시경용 카테터에 있어서, 인쇄회로기판; 상기 인쇄회로기판의 일측면에 구비되며, pH를 측정하기 위한 ISFET; 상기 인쇄회로기판의 타측면에 구비되며, 상기 ISFET의 온도의존성 보상을 위한 온도보상부; 상기 인쇄회로기판의 타측에 구비되며, 상기 ISFET의 구동을 위한 기준전극; 상기 인쇄회로기판, ISFET, 기준전극 및 온도보상부를 실장하며, 상기 ISFET측에 제1개구부가 형성되고, 상기 기준전극측에 제2개구부가 형성된 카테터하우징; 상기 제2개구부에 구비되며, 접촉되는 pH 측정 대상물의 이온 유입을 위한 이온투과부; 및 상기 카테터하우징 내부 중 상기 인쇄회로기판과 이온투과부 사이에 구비되는 기준전극용 기준용액을 포함하는 내시경용 산도 측정 카테터에 의해 달성된다.The object of the present invention is an endoscope catheter, Printed circuit board; An ISFET provided on one side of the printed circuit board and configured to measure pH; A temperature compensator provided on the other side of the printed circuit board and configured to compensate for temperature dependence of the ISFET; A reference electrode provided on the other side of the printed circuit board and configured to drive the ISFET; A catheter housing for mounting the printed circuit board, the ISFET, the reference electrode, and the temperature compensation unit, wherein a first opening is formed at the side of the ISFET, and a second opening is formed at the side of the reference electrode; An ion permeation part provided in the second opening part and configured to introduce ions of a pH measuring object into contact; And it is achieved by the endoscope acidity catheter comprising a reference solution for the reference electrode provided between the printed circuit board and the ion permeable part in the catheter housing.

본 발명은 산도 측정용 카테터를 내시경에 포함시킴으로써 체내의 확보된 위치에서의 산도 측정이 가능하다는 효과가 있다.The present invention has the effect that it is possible to measure the acidity at the position secured in the body by including a catheter for acidity measurement in the endoscope.

본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 아니되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.The terms or words used in this specification and claims are not to be construed as being limited to their ordinary or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best describe their invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

따라서, 본 명세서에 기재된 실시예와 도면에 도시된 구성은 본 발명의 가장 바람직한 일실시예에 불과할 뿐이고 본 발명의 기술적 사상을 모두 대변하는 것은 아니므로, 본 출원시점에 있어서 이들을 대체할 수 있는 다양한 균등물과 변형예들이 있을 수 있음을 이해하여야 한다.Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

이하 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 내시경용 pH 측정 카테터의 일실시예를 나타내는 사시도이고, 도 2는 본 발명에 따른 내시경용 pH 측정 카테터의 일실시예를 나타내는 단면도이다. 도 1 및 도 2를 참조하면, 본 발명의 일실시예에 따른 내시경용 pH 측정 카테터는 인쇄회로기판(PCB, Printed circuit board, 110), 이온감지 전계효과 트랜지스터(ISFET, Ion Sensitive Field Effect Transistor, 120), 기준전극(reference electrode, 130), 온도보상부(140), 카테터하우징(150), 이온투과부(160) 및 기준용액(170)을 포함한다.1 is a perspective view showing an embodiment of the endoscope pH measurement catheter according to the present invention, Figure 2 is a cross-sectional view showing an embodiment of the endoscope pH measurement catheter according to the present invention. 1 and 2, the endoscope pH measurement catheter according to an embodiment of the present invention is a printed circuit board (PCB, Printed circuit board, 110), ion sensing field effect transistor (ISFET, Ion Sensitive Field Effect Transistor, 120, a reference electrode 130, a temperature compensator 140, a catheter housing 150, an ion permeation unit 160, and a reference solution 170.

ISFET(120)는 카테터를 포함하는 내시경이 체내에 투입되었을 경우, 체내의 체액속에 포함된 이온 농도 변화를 측정하기 위한 것이다.The ISFET 120 is for measuring a change in the concentration of ions contained in the body fluid when the endoscope including the catheter is put into the body.

ISFET(120)는 소스영역, 드레인영역, 채널영역, 절연막 및 수소이온감지부를 포함한다. 채널영역이 P형으로 도핑된 실리콘 기판일 때, 소스영역과 드레인영역은 n형으로 도핑된 영역이다. 절연막은 채널영역상부에 형성되는 산화막이다. 수소이온감지부는 자신에게 접촉되는 측정 대상물 중의 특정이온 즉, 수소이온과 반응하여 전기화학적 전위차를 발생시킨다. 이 전위차는 이온농도 함수이며, ISFET 채널 컨덕턴스를 변화시킨다. 따라서, 측정 대상물 내의 이온농도 변화가 드레인전류의 변화로 나타나게 되며, 이 변화를 측정하여 측정 대상물 내 특정이온의 농도를 측정할 수 있다.The ISFET 120 includes a source region, a drain region, a channel region, an insulating film, and a hydrogen ion sensing unit. When the channel region is a P-type doped silicon substrate, the source region and the drain region are n-type doped regions. The insulating film is an oxide film formed over the channel region. The hydrogen ion detector generates an electrochemical potential difference by reacting with a specific ion in the object to be contacted, that is, hydrogen ion. This potential difference is an ion concentration function and changes the ISFET channel conductance. Therefore, the change in the ion concentration in the measurement object is represented by the change in the drain current, and by measuring the change, the concentration of the specific ion in the measurement object can be measured.

기준전극(130)은 기준용액(170)에 기준전위를 인가한다. 기준전위는 기준용액(170) 및 이온투과부(160)를 경유하여 측정 대상물에 인가되고, 결과적으로 ISFET(120)의 게이트 전위는 근사적으로 기준전위가 된다. 즉, ISFET(120)의 게이트 전위는 수소이온감지부의 전위차가 된다. 이때 기준전극(130)은 Ag/AgCl 전극일 수 있다.The reference electrode 130 applies a reference potential to the reference solution 170. The reference potential is applied to the measurement object via the reference solution 170 and the ion permeation unit 160, and as a result, the gate potential of the ISFET 120 becomes approximately the reference potential. That is, the gate potential of the ISFET 120 becomes the potential difference of the hydrogen ion sensing unit. In this case, the reference electrode 130 may be an Ag / AgCl electrode.

온도보상부(140)는 ISFET(120)의 온도의존성을 보상해 주기 위한 것으로서, 일예로 온도보상부(140)는 소스 전위 변화분의 상쇄를 이용한 온도보상회로인 MIS 전계효과 트랜지스터(Metal-Insular-Semiconductor FET)를 이용한 온도보상회로일 수 있다.The temperature compensator 140 compensates for the temperature dependence of the ISFET 120. For example, the temperature compensator 140 is a MIS field effect transistor (Metal-Insular) which is a temperature compensating circuit using offset of source potential variation. It may be a temperature compensation circuit using a semiconductor FET).

카테터하우징(150)은 인쇄회로기판(110), ISFET(120), 기준전극(130), 온도보상부(140) 및 기준용액(170)을 포함하며, 하우징의 일부에 제1개구부(151)와 다른 일부에 제2개구부(152)가 형성되어 있다. 인쇄회로기판(110)이 카테터하우 징(150)의 중앙부에 위치하고, 인쇄회로기판(110)을 중심으로 인쇄회로기판(110)의 양측면에는 ISFET(120)와 기준전극(130) 및 온도보상부(140)가 구비된다.The catheter housing 150 includes a printed circuit board 110, an ISFET 120, a reference electrode 130, a temperature compensator 140, and a reference solution 170, and includes a first opening 151 in a part of the housing. The second opening 152 is formed at a portion different from that. The printed circuit board 110 is positioned at the center of the catheter housing 150, and the ISFET 120, the reference electrode 130, and the temperature compensation unit are formed on both sides of the printed circuit board 110, centering on the printed circuit board 110. 140 is provided.

인쇄회로기판(110)의 일측면에는 ISFET(120)가 구비되고, ISFET(120)가 구비된 측의 카테터하우징(150)에는 제1개구부(151)가 형성되어 ISFET(120)의 이온감지부가 카테터하우징(150) 외부로 노출되도록 한다. 인쇄회로기판(110)의 타측면에는 기준전극(130)과 온도보상부(140)가 구비되며, 기준전극(130)이 구비된 측의 카테터하우징(150)에는 제2개구부(152)가 형성되어 형성된 제2개구부(152)에는 이온투과부(160)가 구비된다.The ISFET 120 is provided at one side of the printed circuit board 110, and the first opening 151 is formed at the catheter housing 150 on the side where the ISFET 120 is provided, such that the ion sensing unit of the ISFET 120 is provided. The catheter housing 150 is exposed to the outside. The other side of the printed circuit board 110 is provided with the reference electrode 130 and the temperature compensation unit 140, the second opening 152 is formed in the catheter housing 150 of the side where the reference electrode 130 is provided. The formed second opening 152 is provided with an ion permeation unit 160.

이온투과부(160)는 측정 대상물의 이온을 유입하여 기준용액(170)과 측정 대상물을 전기적으로 연결하는 염다리(salt bridge) 역할을 한다.The ion permeation unit 160 serves as a salt bridge for electrically connecting the reference solution 170 and the measurement object by introducing ions of the measurement object.

기준용액(170)은 카테터하우징(150) 내부 중 인쇄회로기판(110)과 이온투과부(160) 사이에 채워지는 것으로서 기준전극(130)과 함께 ISFET(120)의 기준전극(130)을 구성한다. 이때 기준용액(170)은 AgCl 또는 KCl 용액일 수 있고, 용액 대신 겔(gel)을 사용하는 것이 더욱 바람직하다.The reference solution 170 is filled between the printed circuit board 110 and the ion permeation unit 160 in the catheter housing 150 to form the reference electrode 130 of the ISFET 120 together with the reference electrode 130. . In this case, the reference solution 170 may be an AgCl or KCl solution, and it is more preferable to use a gel instead of the solution.

한편, 체내 pH를 측정하기 위한 카테터하우징(150)은 타원형이나 캡슐형이 바람직하며, 단축의 지름은 2㎜ 내지 5㎜가 바람직하다.On the other hand, the catheter housing 150 for measuring the body pH is preferably oval or capsule type, the diameter of the short axis is preferably 2mm to 5mm.

이렇게 ISFET(120)를 이용한 pH 측정 센서가 내장된 카테터를 내시경에 포함시켜 활용함으로써 내시경의 이미지센서를 통해 확인된 지점에서의 pH를 측정할 수 있게 된다. 즉, 식도나 위와 같은 체내 특정 위치에서의 위액 역류 등 pH 이상여부 판별을 통해 보다 정확한 체내 이상여부 진단이 이루어질 수 있도록 한다.Thus, by using the catheter built-in pH measurement sensor using the ISFET 120 in the endoscope, it is possible to measure the pH at the point confirmed by the image sensor of the endoscope. That is, a more accurate diagnosis of abnormality in the body may be made by determining whether pH is abnormal, such as gastric fluid reflux at a specific location in the body such as the esophagus or stomach.

도 3은 본 발명에 따른 내시경용 pH 측정 카테터의 다른 실시예를 나타내는 사시도이고, 도 4는 본 발명에 따른 내시경용 pH 측정 카테터의 다른 실시예를 나타내는 단면도이다. 도 3 및 도 4를 참조하면, 본 발명의 다른 실시예에 따른 카테터는 소형화를 위해 카테터하우징(150) 내부에 실장되는 구성요소들의 배치를 상기 일실시예에서와 달리 설정하고 있다.Figure 3 is a perspective view showing another embodiment of the endoscope pH measurement catheter according to the present invention, Figure 4 is a cross-sectional view showing another embodiment of the endoscope pH measurement catheter according to the present invention. 3 and 4, the catheter according to another embodiment of the present invention sets the arrangement of components mounted in the catheter housing 150 differently from the above embodiment for miniaturization.

즉, 이온투과부(160)가 위치할 제2개구부(152)를 인쇄회로기판(110)을 기준으로 제1개구부(151)의 위치와 대응되는 위치에 형성하고, 형성된 제2개구부(152)에 이온투과부(160)를 구비함으로써 보다 소형의 카테터를 제조할 수 있게 된다.That is, the second opening 152 on which the ion transmitting unit 160 is to be formed is formed at a position corresponding to the position of the first opening 151 with respect to the printed circuit board 110, and formed on the formed second opening 152. By providing the ion permeation unit 160, it is possible to manufacture a more compact catheter.

본 발명은 이상에서 살펴본 바와 같이 바람직한 실시예를 들어 도시하고 설명하였으나, 상기한 실시예에 한정되지 아니하며 본 발명의 정신을 벗어나지 않는 범위 내에서 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술사상과 아래에 기재될 특허청구범위의 균등범위 내에서 다양한 수정 및 변형이 가능함은 물론이다.Although the present invention has been shown and described with reference to the preferred embodiments as described above, it is not limited to the above embodiments and those skilled in the art without departing from the spirit of the present invention. Various modifications and variations are possible without departing from the spirit of the present invention and equivalents of the claims to be described below.

도 1은 본 발명에 따른 내시경용 pH 측정 카테터의 일실시예를 나타내는 사시도,1 is a perspective view showing an embodiment of the endoscope pH measurement catheter according to the present invention,

도 2는 본 발명에 따른 내시경용 pH 측정 카테터의 일실시예를 나타내는 단면도,Figure 2 is a cross-sectional view showing an embodiment of the endoscope pH measurement catheter according to the present invention,

도 3은 본 발명에 따른 내시경용 pH 측정 카테터의 다른 실시예를 나타내는 사시도,Figure 3 is a perspective view showing another embodiment of the endoscope pH measurement catheter according to the present invention,

도 4는 본 발명에 따른 내시경용 pH 측정 카테터의 다른 실시예를 나타내는 단면도이다.Figure 4 is a cross-sectional view showing another embodiment of the endoscope pH measurement catheter according to the present invention.

<도면의 주요 부분에 대한 부호의 설명>                 <Explanation of symbols for the main parts of the drawings>

110: 인쇄회로기판 120: ISFET 130: 기준전극110: printed circuit board 120: ISFET 130: reference electrode

140: 온도보상부 150: 카테터하우징 151: 제1개구부140: temperature compensation unit 150: catheter housing 151: first opening

152: 제2개구부 160: 이온투과부 170: 기준용액152: second opening 160: ion permeation 170: reference solution

Claims (1)

내시경용 카테터에 있어서,In an endoscope catheter, 인쇄회로기판;Printed circuit board; 상기 인쇄회로기판의 일측면에 구비되며, pH를 측정하기 위한 ISFET;An ISFET provided on one side of the printed circuit board and configured to measure pH; 상기 인쇄회로기판의 타측면에 구비되며, 상기 ISFET의 온도의존성 보상을 위한 온도보상부;A temperature compensator provided on the other side of the printed circuit board and configured to compensate for temperature dependence of the ISFET; 상기 인쇄회로기판의 타측에 구비되며, 상기 ISFET의 구동을 위한 기준전극;A reference electrode provided on the other side of the printed circuit board and configured to drive the ISFET; 상기 인쇄회로기판, ISFET, 기준전극 및 온도보상부를 실장하며, 상기 ISFET측에 제1개구부가 형성되고, 상기 기준전극측에 제2개구부가 형성된 카테터하우징;A catheter housing for mounting the printed circuit board, the ISFET, the reference electrode, and the temperature compensation unit, wherein a first opening is formed at the side of the ISFET, and a second opening is formed at the side of the reference electrode; 상기 제2개구부에 구비되며, 접촉되는 pH 측정 대상물의 이온 유입을 위한 이온투과부; 및An ion permeation part provided in the second opening part and configured to introduce ions of a pH measuring object into contact; And 상기 카테터하우징 내부 중 상기 인쇄회로기판과 이온투과부 사이에 구비되는 기준전극용 기준용액Reference solution for a reference electrode provided between the printed circuit board and the ion permeable part in the catheter housing 을 포함하는 내시경용 산도 측정 카테터.Acidity catheter for endoscopic comprising a.
KR1020080000747A 2008-01-03 2008-01-03 Endoscopic pH Measurement Catheter KR100928225B1 (en)

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GB2565632A (en) * 2017-06-26 2019-02-20 Ibm Urine catheter pH sensor

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KR101590531B1 (en) 2015-10-23 2016-02-01 대윤계기산업 주식회사 pH measuring device

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KR20020089669A (en) * 2001-05-24 2002-11-30 대한민국(경북대학교 총장) Bi-directional communication telemetry capsule
KR20070111648A (en) * 2006-05-18 2007-11-22 강만희 Sensor module and capsule type medical device including the same

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KR20020089669A (en) * 2001-05-24 2002-11-30 대한민국(경북대학교 총장) Bi-directional communication telemetry capsule
KR20070111648A (en) * 2006-05-18 2007-11-22 강만희 Sensor module and capsule type medical device including the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2565632A (en) * 2017-06-26 2019-02-20 Ibm Urine catheter pH sensor
GB2565632B (en) * 2017-06-26 2020-03-11 Ibm Urine catheter pH sensor

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