JPH09294730A - Vibration detection sensor at shunt formation part - Google Patents
Vibration detection sensor at shunt formation partInfo
- Publication number
- JPH09294730A JPH09294730A JP17168596A JP17168596A JPH09294730A JP H09294730 A JPH09294730 A JP H09294730A JP 17168596 A JP17168596 A JP 17168596A JP 17168596 A JP17168596 A JP 17168596A JP H09294730 A JPH09294730 A JP H09294730A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- film
- shunt
- polymer piezoelectric
- electrically conductive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000015572 biosynthetic process Effects 0.000 title claims description 6
- 238000001514 detection method Methods 0.000 title claims description 4
- 239000010408 film Substances 0.000 claims abstract description 29
- 229920000642 polymer Polymers 0.000 claims abstract description 13
- 239000000853 adhesive Substances 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 239000010409 thin film Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 abstract description 7
- 239000002033 PVDF binder Substances 0.000 abstract description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004698 Polyethylene Substances 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 3
- -1 polyethylene Polymers 0.000 abstract description 3
- 229920000573 polyethylene Polymers 0.000 abstract description 3
- 229920006362 Teflon® Polymers 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract description 2
- 210000004204 blood vessel Anatomy 0.000 description 6
- 208000007536 Thrombosis Diseases 0.000 description 5
- 230000017531 blood circulation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000023555 blood coagulation Effects 0.000 description 4
- 238000009499 grossing Methods 0.000 description 4
- 210000003462 vein Anatomy 0.000 description 3
- 210000001367 artery Anatomy 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 239000003130 blood coagulation factor inhibitor Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000003527 fibrinolytic agent Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 229960000103 thrombolytic agent Drugs 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- HTTJABKRGRZYRN-UHFFFAOYSA-N Heparin Chemical compound OC1C(NC(=O)C)C(O)OC(COS(O)(=O)=O)C1OC1C(OS(O)(=O)=O)C(O)C(OC2C(C(OS(O)(=O)=O)C(OC3C(C(O)C(O)C(O3)C(O)=O)OS(O)(=O)=O)C(CO)O2)NS(O)(=O)=O)C(C(O)=O)O1 HTTJABKRGRZYRN-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 102000003990 Urokinase-type plasminogen activator Human genes 0.000 description 1
- 108090000435 Urokinase-type plasminogen activator Proteins 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000003872 anastomosis Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000001631 haemodialysis Methods 0.000 description 1
- 230000000322 hemodialysis Effects 0.000 description 1
- 229960002897 heparin Drugs 0.000 description 1
- 229920000669 heparin Polymers 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 229960005356 urokinase Drugs 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Landscapes
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、人工臓器を用いた血液
透析或いは濾過療法において、生体からの血液の取り出
し部位となるシャント形成部位における血液の流通状態
をモニターするのに適したシャント形成部位における振
動検出センサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hemodialysis or filtration therapy using an artificial organ, and a shunt formation site suitable for monitoring the flow state of blood at a shunt formation site which is a site for taking blood out of a living body. Vibration detection sensor in.
【０００２】[0002]
【従来の技術】シャント形成部においては血液の凝固が
起き易く、しばしば血栓が生じるという問題が発生す
る。そして、血栓が生じた場合には、それが早期に発見
されたならば、血液凝固阻止剤や血栓溶解剤を投与し
て、生じた血栓を溶かす等して除去することができる
が、時間が経過するとそれを溶かすことが困難となるた
め、手術によって血栓を除去しなければならない。しか
も、この手術を数時間のうちに行わなければその血管が
使えなくなるため、改めてシャントを形成しなければな
らないといった事態を招くこととなる。2. Description of the Related Art Blood coagulation easily occurs in a shunt forming portion, and a problem of thrombus often occurs. If a thrombus occurs, and if it is found early, it can be removed by administering a blood coagulation inhibitor or thrombolytic agent and dissolving the resulting thrombus. Over time, it becomes difficult to dissolve it, and the thrombus must be removed by surgery. In addition, if this operation is not performed within a few hours, the blood vessel cannot be used, which may cause a situation in which a shunt must be formed again.
【０００３】このため、従来から患者は、毎日起床時及
び就寝時等にシャント音を聴診器で聞いて血液の流通状
態を確認し、シャント音が小さくなって聞こえにくくな
ったら、直ちに病院に行き注射や点滴等によって、ヘパ
リン等の血液凝固阻止剤や、ウロキナーゼ、アクチベタ
ー等の血栓溶解剤の投与を受けたり、状況に応じて手術
を受けるようになっている。Therefore, conventionally, a patient listens to a shunt sound with a stethoscope every day when he wakes up or goes to bed to check the blood circulation state, and when the shunt sound becomes small and difficult to hear, he / she immediately goes to the hospital. By injection or infusion, blood coagulation inhibitors such as heparin and thrombolytic agents such as urokinase and activator are administered, and surgery is performed depending on the situation.
【０００４】従来、シャント形成部位における振動検出
センサには、ＰＺＴ等のセラミック系でできた加速度セ
ンサーが用いられていたが、センサーが固いためシャン
ト形成部位の血管を圧迫し、長時間使用すると血管のな
かに血液の凝固が起き易く、しばしば血栓が生じるとい
う問題が発生する。従って、短時間のモニターにしか使
用できず、長時間のモニターに適したセンサーが待望さ
れていた。Conventionally, an acceleration sensor made of a ceramic system such as PZT has been used as a vibration detecting sensor at a shunt forming site. However, since the sensor is hard, the blood vessel at the shunt forming site is pressed and the blood vessel is used when used for a long time. There is a problem that blood coagulation is likely to occur in the inside, and thrombus often occurs. Therefore, a sensor that can be used only for a short time monitor and is suitable for a long time monitor has been desired.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記の事情
に鑑みてなされたもので、シャントの吻合部で生じる振
動を検出するため可撓性のある圧電素子からなるセンサ
ーを、シャントの形成されている腕部に血管を圧迫する
ことなく貼る包帯又は絆創膏等で取り付けられ、正確に
振動を検出することができるシャント形成部位における
振動検出センサを提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a shunt is provided with a sensor composed of a flexible piezoelectric element for detecting a vibration generated at the anastomosis portion of the shunt. It is an object of the present invention to provide a vibration detection sensor in a shunt formation site, which is attached to an existing arm portion with a bandage or a bandage that is applied without pressing a blood vessel and can accurately detect vibration.
【０００６】[0006]
【問題を解決するための手段】本発明によるセンサは、
両面に可撓性電極膜を付着させ薄膜状の高分子圧電素子
１と、前記高分子圧電素子の各電極から信号を取り出す
信号線３と、前記高分子圧電素子１と信号線３とを絶縁
保護するための可撓性を有するフイルム２と、前記高分
子圧電素子１の片面に取り付けられる導電膜５からなる
ことを特徴とするものである。The sensor according to the invention comprises:
A thin film polymer piezoelectric element 1 having flexible electrode films attached to both surfaces, a signal line 3 for extracting a signal from each electrode of the polymer piezoelectric element, and the polymer piezoelectric element 1 and the signal line 3 are insulated from each other. It is characterized by comprising a flexible film 2 for protection and a conductive film 5 attached to one surface of the polymer piezoelectric element 1.
【０００７】[0007]
【作用】上記の構成によれば、全ての材料に可撓性があ
り、皮膚から張りでた血管にそって取り付けることがで
き、シャントの吻合部で生じる振動を効率よく検出する
ことができる。According to the above construction, all the materials are flexible, can be attached along the blood vessel stretched from the skin, and the vibration generated at the anastomotic part of the shunt can be efficiently detected.
【０００８】[0008]
【実施例】以下に、本発明をより具体的に明らかにする
ために、本発明の実施例を説明する。本発明の第１の実
施例について図１に基づいて説明する。図１は、本発明
の第１実施例で、センサーの構造を模式的に表した図で
ある。１は、ポリフッ化ビニリデン（ＰＶＤＦ）、ＰＶ
ＤＦとＰＺＴの複合材料等の高分子圧電材料を薄膜状に
し、その両面に可撓性電極膜を付着させた圧電素子であ
る。２は、ポリエチレン、テフロン、ポリエチレン等を
基材としたテープで、可撓性があり絶縁性能の良いフィ
ルムである。３は、前記圧電素子１が検出した信号を取
り出すための信号線である。５は、センサーの片側の電
極を人体に接地させるため、導電性の接着剤の付いた薄
膜の銅テープ又はアルミテープからなる導電膜である。EXAMPLES Examples of the present invention will be described below in order to clarify the present invention more specifically. A first embodiment of the present invention will be described based on FIG. FIG. 1 is a diagram schematically showing the structure of a sensor according to the first embodiment of the present invention. 1 is polyvinylidene fluoride (PVDF), PV
This is a piezoelectric element in which a polymeric piezoelectric material such as a composite material of DF and PZT is formed into a thin film and flexible electrode films are attached to both surfaces thereof. 2 is a tape made of polyethylene, Teflon, polyethylene or the like as a base material, which is a flexible film having good insulation performance. Reference numeral 3 is a signal line for extracting a signal detected by the piezoelectric element 1. Reference numeral 5 is a conductive film made of a thin film copper tape or aluminum tape with a conductive adhesive for grounding the electrode on one side of the sensor to the human body.
【０００９】圧電素子１の各電極にはそれぞれ信号線３
が接続されている。前記圧電素子１及び信号線３の保護
及び絶縁のため、フィルム２にてサンドイッチ状に貼り
付け合わされている。前記フィルム２の一方に窓が開い
ていて、前記圧電素子１の片側の電極面と導電膜をその
窓を介して導電性接着剤で接続される。A signal line 3 is provided on each electrode of the piezoelectric element 1.
Is connected. In order to protect and insulate the piezoelectric element 1 and the signal line 3, a film 2 is attached in a sandwich shape. A window is opened on one side of the film 2, and the electrode surface on one side of the piezoelectric element 1 is connected to the conductive film with a conductive adhesive through the window.
【００１０】使用方法について図３を用いて、以下説明
する。図３は、内シャントを模式的に表した図である。
内シャントは、手首からやや心臓よりの部位で、腕の深
部にある動脈の内の一本１１と体表面側にある静脈１２
とが結合部１３にて吻合されている。前記結合部１３か
ら心臓に近い静脈近傍にセンサー１０が貼る包帯又は絆
創膏等で取り付けられ、該センサ１０により検出された
信号を増幅するための増幅手段２と、該増幅手段２の信
号の中からシャント形成部位より発生する振動成分の周
波数を選択する周波数選択手段３と、該周波数選択手段
３の交流電圧に比例した直流電圧に変換する平滑化手段
４と、正常時の血流量に比例した直流電圧（初期値：
Ｂ）を記憶しておくための初期値記憶手段５と、該初期
値記憶手段５に記憶されている初期値：Ｂよりも現在の
血流量：Ａが一定以下になると警報を患者に出力する判
定手段６とから構成されているシャント形成部位におけ
る血流状態のモニター装置により監視される。尚センサ
ー以外は、図示せず。The method of use will be described below with reference to FIG. FIG. 3 is a diagram schematically showing the inner shunt.
The internal shunt is one part of the artery in the deep part of the arm and the vein 12 on the body surface side, which is a part slightly from the wrist to the heart.
And are anastomosed at the joint 13. From the signal of the amplifying means 2, which is attached to the vicinity of the vein near the heart from the coupling part 13 by a bandage or a bandage attached to the sensor 10, and which amplifies the signal detected by the sensor 10. Frequency selecting means 3 for selecting the frequency of the vibration component generated from the shunt forming part, smoothing means 4 for converting it into a DC voltage proportional to the AC voltage of the frequency selecting means 3, and DC proportional to the blood flow in the normal state. Voltage (initial value:
B) for storing the initial value, and an alarm is output to the patient when the current blood flow amount: A is lower than a predetermined value than the initial value: B stored in the initial value storage unit 5. It is monitored by a monitoring device for the blood flow state at the shunt formation site, which is composed of the determination means 6. Not shown, except for the sensor.
【００１１】内シャントが従来と同様に形成されている
腕部に対して、シャントの吻合部で生じる振動をセンサ
１０により電気信号に変換し、変換された信号を増幅手
段２により増幅し、前記増幅された信号の中からシャン
トの吻合部で生じる振動に対応した周波数成分のみを周
波数選択手段３により選択し、選択された周波数成分の
レベルを平滑化手段４にて整流すると共に平滑化し、シ
ャントが正常に機能している時の前記平滑化手段４の出
力電圧である初期値：Ａを初期値記憶手段５にて記憶
し、前記初期値記憶手段５に記憶されている電圧：Ｂよ
りモニタしているときの前記平滑手段４の出力電圧が一
定以下に低下すると判定手段６は警報を患者に出力し、
患者が早期に血流の低下を検知することができる。With respect to the arm portion in which the inner shunt is formed in the same manner as in the conventional case, the sensor 10 converts the vibration generated in the anastomotic portion of the shunt into an electric signal, and the converted signal is amplified by the amplifying means 2, From the amplified signal, only the frequency component corresponding to the vibration generated at the anastomotic part of the shunt is selected by the frequency selection means 3, and the level of the selected frequency component is rectified and smoothed by the smoothing means 4 to make the shunt. Of the output voltage of the smoothing means 4 when is normally operating is stored in the initial value storage means 5, and is monitored from the voltage: B stored in the initial value storage means 5. When the output voltage of the smoothing means 4 during operation falls below a certain level, the judging means 6 outputs an alarm to the patient,
The patient can detect a decrease in blood flow early.
【００１２】本発明の第２の実施例について図２に基づ
いて説明する。第２の実施例は第１実施例の変更例で、
相違点について以下説明する。導電膜５の代わりに、導
電性接着剤４を使用する。導電性接着剤４としは、特公
平７−８３７４３号に開示されている、ビニルピロリド
ン（共）重合体と（メタ）アクリル酸（塩）−（メタ）
アクリル酸アルクルエステル共重合体のブレンドポリマ
ーと、電解質及び軟化材を含有する導電性粘着剤が知ら
れている。他には、薄膜の銅テープ又はアルミテープ等
のシールド材に使用されている導電性接着剤も使用でき
る。A second embodiment of the present invention will be described with reference to FIG. The second embodiment is a modification of the first embodiment,
The differences will be described below. Instead of the conductive film 5, the conductive adhesive 4 is used. As the conductive adhesive 4, a vinylpyrrolidone (co) polymer and (meth) acrylic acid (salt)-(meth) disclosed in JP-B-7-83743 are used.
A conductive polymer containing a blend polymer of an acrylic acid alkly ester copolymer and an electrolyte and a softening agent is known. Besides, a conductive adhesive used for a shield material such as a thin film copper tape or an aluminum tape can also be used.
【００１３】圧電素子１の各電極にはそれぞれ信号線３
が接続されている。前記圧電素子１及び信号線３の保護
及び絶縁のため、フィルム２にてサンドイッチ状に貼り
付け合わされている。前記フィルム２の一方に複数の抜
き穴が開いていて、前記圧電素子１の片側の電極面と導
電性接着剤がその抜き穴を介して接続されてる。使用方
法は、第１実施例がセンサ１０を貼る包帯又は絆創膏等
で取り付けられているのに対し、第２実施例ではセンサ
１０の接着剤４で取り付ける違いだけであるので、説明
を省略する。A signal line 3 is provided on each electrode of the piezoelectric element 1.
Is connected. In order to protect and insulate the piezoelectric element 1 and the signal line 3, a film 2 is attached in a sandwich shape. A plurality of holes are formed in one side of the film 2, and the electrode surface on one side of the piezoelectric element 1 is connected to the conductive adhesive through the holes. The method of use is different from that of the first embodiment in that it is attached with a bandage or bandage to which the sensor 10 is attached, but in the second embodiment, the only difference is that the sensor 10 is attached with the adhesive 4.
【００１４】第１及び第２実施例とも、フィルム２を向
かい合わせて張り合わせたが、一枚のフィルムを折り返
して（Ｕ字条に）張り合わせても良い。In both the first and second embodiments, the films 2 are opposed to each other and bonded together, but one film may be folded back and bonded (in a U-shape).
【００１５】[0015]
【発明の効果】シャントの吻合部で生じる振動を検出す
るため可撓性のある圧電素子からなるセンサーを、シャ
ントの形成されている腕部に血管を圧迫することなく貼
る包帯又は絆創膏等で取り付けられ、正確に振動を検出
することができる。EFFECTS OF THE INVENTION A sensor composed of a flexible piezoelectric element for detecting vibration generated at the anastomotic part of a shunt is attached to the arm part where the shunt is formed by a bandage or a bandage that is applied without pressing the blood vessel. Therefore, the vibration can be accurately detected.
【図１】本発明の第１実施例で、センサーの構造を模式
的に表した図である。FIG. 1 is a diagram schematically showing the structure of a sensor in a first embodiment of the present invention.
【図２】本発明の第２実施例で、センサーの構造を模式
的に表した図である。FIG. 2 is a diagram schematically showing the structure of a sensor according to the second embodiment of the present invention.
【図３】内シャントを模式的に表した図である。FIG. 3 is a diagram schematically showing an inner shunt.
１ 圧電素子 ２ フィルム ３
信号線 ４ 導電接着剤 ５ 導電膜 １０
本発明のセンサ １１ 動脈 １２ 静脈 １
３ 結合部1 Piezoelectric element 2 Film 3
Signal line 4 Conductive adhesive 5 Conductive film 10
Sensor of the present invention 11 Artery 12 Vein 1
3 connection
Claims (2)
分子圧電素子１と、前記高分子圧電素子の各電極から信
号を取り出す信号線３と、前記高分子圧電素子１と信号
線３とを絶縁保護するための可撓性を有するフイルム２
と、前記高分子圧電素子１の片面に取り付けられる導電
膜５からなるシャント形成部位における振動検出セン
サ。1. A polymer piezoelectric element 1 in the form of a thin film having flexible electrode films attached to both surfaces, a signal line 3 for extracting a signal from each electrode of the polymer piezoelectric element, the polymer piezoelectric element 1 and a signal. A flexible film 2 for insulating and protecting the wire 3
And a vibration detecting sensor in a shunt forming portion made of a conductive film 5 attached to one surface of the polymer piezoelectric element 1.
記載のシャント形成部位における振動検出センサ。2. The conductive film 5 is made of a conductive adhesive.
A vibration detection sensor in the described shunt formation site.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17168596A JPH09294730A (en) | 1996-05-02 | 1996-05-02 | Vibration detection sensor at shunt formation part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17168596A JPH09294730A (en) | 1996-05-02 | 1996-05-02 | Vibration detection sensor at shunt formation part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09294730A true JPH09294730A (en) | 1997-11-18 |
Family
ID=15927803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17168596A Withdrawn JPH09294730A (en) | 1996-05-02 | 1996-05-02 | Vibration detection sensor at shunt formation part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09294730A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006204534A (en) * | 2005-01-27 | 2006-08-10 | National Institute Of Advanced Industrial & Technology | Apparatus for detecting body pressure fluctuation, apparatus, system, and program for managing biological information, and recording medium which records the program |
| US7443082B2 (en) | 2006-03-03 | 2008-10-28 | Basf Corporation | Piezoelectric polymer composite article and system |
| WO2012145936A1 (en) * | 2011-04-27 | 2012-11-01 | 深圳市迈迪加科技发展有限公司 | Heart function piezoelectric sensor |
| WO2015064217A1 (en) * | 2013-10-28 | 2015-05-07 | 株式会社村田製作所 | Piezoelectric sensor |
| JPWO2016163093A1 (en) * | 2015-04-08 | 2018-02-01 | ニプロ株式会社 | Blood pressure measuring device |
| JP2019187648A (en) * | 2018-04-20 | 2019-10-31 | 国立大学法人浜松医科大学 | Blood flow sound sensor |
| CN110461216A (en) * | 2017-03-24 | 2019-11-15 | 皇家飞利浦有限公司 | Based on the intravascular blood flow sensing to fall off that is vortexed |
-
1996
- 1996-05-02 JP JP17168596A patent/JPH09294730A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006204534A (en) * | 2005-01-27 | 2006-08-10 | National Institute Of Advanced Industrial & Technology | Apparatus for detecting body pressure fluctuation, apparatus, system, and program for managing biological information, and recording medium which records the program |
| JP4649679B2 (en) * | 2005-01-27 | 2011-03-16 | 独立行政法人産業技術総合研究所 | Body pressure fluctuation detection device |
| US7443082B2 (en) | 2006-03-03 | 2008-10-28 | Basf Corporation | Piezoelectric polymer composite article and system |
| WO2012145936A1 (en) * | 2011-04-27 | 2012-11-01 | 深圳市迈迪加科技发展有限公司 | Heart function piezoelectric sensor |
| WO2015064217A1 (en) * | 2013-10-28 | 2015-05-07 | 株式会社村田製作所 | Piezoelectric sensor |
| JPWO2015064217A1 (en) * | 2013-10-28 | 2017-03-09 | 株式会社村田製作所 | Piezoelectric sensor |
| JPWO2016163093A1 (en) * | 2015-04-08 | 2018-02-01 | ニプロ株式会社 | Blood pressure measuring device |
| US11241160B2 (en) | 2015-04-08 | 2022-02-08 | Nipro Corporation | Blood pressure measuring device |
| CN110461216A (en) * | 2017-03-24 | 2019-11-15 | 皇家飞利浦有限公司 | Based on the intravascular blood flow sensing to fall off that is vortexed |
| JP2019187648A (en) * | 2018-04-20 | 2019-10-31 | 国立大学法人浜松医科大学 | Blood flow sound sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030805 |