JPH0239464Y2 - - Google Patents
Info
- Publication number
- JPH0239464Y2 JPH0239464Y2 JP1985203524U JP20352485U JPH0239464Y2 JP H0239464 Y2 JPH0239464 Y2 JP H0239464Y2 JP 1985203524 U JP1985203524 U JP 1985203524U JP 20352485 U JP20352485 U JP 20352485U JP H0239464 Y2 JPH0239464 Y2 JP H0239464Y2
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- blood
- cannula
- tubular body
- pressure
- 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.)
- Expired
Links
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 239000008280 blood Substances 0.000 description 25
- 210000004369 blood Anatomy 0.000 description 25
- 230000036772 blood pressure Effects 0.000 description 7
- 210000004204 blood vessel Anatomy 0.000 description 7
- 230000017531 blood circulation Effects 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 208000015181 infectious disease Diseases 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 206010019280 Heart failures Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 210000000709 aorta Anatomy 0.000 description 1
- 230000023555 blood coagulation Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000002837 heart atrium Anatomy 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 210000005246 left atrium Anatomy 0.000 description 1
- 208000010125 myocardial infarction Diseases 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 210000001147 pulmonary artery Anatomy 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 210000005245 right atrium Anatomy 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- External Artificial Organs (AREA)
Description
【考案の詳細な説明】
イ 産業上の利用分野
本考案は人工心臓用カニユーレに関するもので
ある。[Detailed description of the invention] A. Field of industrial application The present invention relates to a cannula for an artificial heart.
ロ 従来技術
近年、開心術後、心筋梗塞などによる重症心不
全例に、補助的かつ一時的に心臓の機能を代行す
るための人工心臓の開発が進められている。例え
ば第５図に示すように、生体の心臓１０の右心房
と肺動脈との間や、左心房と大動脈との間に夫々
サツク型血液ポンプ装置１１が連結される。この
ような血液ポンプ装置は、我国でも世界に先がけ
て研究されており、補助人工心臓として既に臨床
応用にも実施されている。B. Prior Art In recent years, progress has been made in the development of artificial hearts to supplement and temporarily take over the functions of the heart in cases of severe heart failure due to myocardial infarction after open heart surgery. For example, as shown in FIG. 5, a sac-type blood pump device 11 is connected between the right atrium and the pulmonary artery of the living body's heart 10, and between the left atrium and the aorta. Such a blood pump device is being researched in Japan ahead of the rest of the world, and has already been put into clinical application as an auxiliary artificial heart.
この血液ポンプ装置１１はサツク型と称される
ものであり、第６図に明示するように、主として
耐圧性（例えばポリカーボネート或いはポリウレ
タン製）のハウジングアウターケース１と、この
ハウジングアウターケース内に気密に収納される
偏平袋状のサツク型の血液チヤンバー２とからな
る。この血液チヤンバー２の上部には、血液チヤ
ンバーに連通して血液導入管３と血液排出管４と
が上向きにかつ略平行に形成されている。血液チ
ヤンバー部の上部周囲には、ハウジングの一部を
なすフランジ部５を設けてあり、このフランジ部
によつて血液チヤンバーはハウジングアウターケ
ース１内に気密に収納される。また、血液導入管
３と血液排出管４との各内部には、血液１７の逆
流を防止する人工の逆止弁６，７が装着してあ
り、これにより、血液導入管３から血液チヤンバ
ー２内に導入された血液１７は、血液排出管４よ
り拍出されるようになつている。血液の拍出は、
ハウジングアウターケース１の底部に設けられた
ポート８を通じて流体、例えば圧縮空気及び減圧
空気の導入、排出を交互に行い、血液チヤンバー
外圧の変化に伴つて血液チヤンバーが膨張、収縮
を繰り返すことによつてなされるものである。生
体の心臓に結合された各カニユーレ１２と血液チ
ヤンバー２側の各血液導管３及び４とは、各コネ
クタ１３の両端部からその中央位置に設けたリン
グ状フランジ１４の位置まで夫々挿入される。 This blood pump device 11 is of the so-called sack type, and as shown in FIG. It consists of a blood chamber 2 in the form of a flat bag to be housed. At the upper part of the blood chamber 2, a blood introduction tube 3 and a blood discharge tube 4 are formed upwardly and substantially in parallel to communicate with the blood chamber. A flange portion 5 forming a part of the housing is provided around the upper portion of the blood chamber portion, and the blood chamber is hermetically housed within the housing outer case 1 by this flange portion. In addition, artificial check valves 6 and 7 are installed inside each of the blood introduction tube 3 and the blood discharge tube 4 to prevent the blood 17 from flowing back. The blood 17 introduced therein is pumped out from the blood discharge tube 4. Blood pumping is
By alternately introducing and discharging fluid such as compressed air and decompressed air through the port 8 provided at the bottom of the housing outer case 1, the blood chamber repeats expansion and contraction as the external pressure of the blood chamber changes. It is what is done. Each cannula 12 connected to the heart of the living body and each blood conduit 3 and 4 on the blood chamber 2 side are inserted from both ends of each connector 13 to the position of a ring-shaped flange 14 provided at the center thereof.
上記の如き血液ポンプ装置１１を用いて不全心
の補助または完全代行を行うとき、心臓又は血管
内の血圧（実質圧）を直接測定できれば、これに
基いて必要な処置を講じることができる。例え
ば、血圧または血流量を適切にして人工心臓を駆
動したり、昇圧物質を投与したり、適切な循環系
への処置を講じることができる。これまで、先端
に圧力センサを組み込んだ長尺状のカテーテルを
カニユーレとは別に生体外から血管を通して心臓
内又は血管内の所定位置まで挿入する方法が知ら
れている。しかし、この方法は、カテーテルを目
的位置まで挿入する作業が加わる上、圧測定中に
血液凝固を防ぐために時々生理的食塩水で洗うか
または持続注入する必要があるため、感染、空気
の混入などの危険性がある。 When the blood pump device 11 as described above is used to assist or completely replace a failing heart, if the blood pressure (real pressure) in the heart or blood vessels can be directly measured, necessary measures can be taken based on this. For example, it is possible to drive an artificial heart by adjusting the blood pressure or blood flow appropriately, administer a pressor substance, or take appropriate measures for the circulatory system. BACKGROUND ART Until now, a method has been known in which a long catheter having a pressure sensor incorporated at its tip is inserted from outside the body, separately from a cannula, through a blood vessel to a predetermined position within the heart or blood vessel. However, this method does not only require the work of inserting the catheter to the target position, but also requires occasional washing with physiological saline or continuous infusion to prevent blood clotting during pressure measurement, which can lead to infections and air contamination. There is a risk of
ハ 考案の目的
本考案の目的は、生体内の血圧等を正確かつ容
易に測定するとのできる人工心臓用カニユーレを
提供することにある。C. Purpose of the invention The purpose of the present invention is to provide a cannula for an artificial heart that can accurately and easily measure blood pressure, etc. in a living body.
ニ 考案の構成
即ち、本考案は、先端部に抜け止め用のフラン
ジ部を有する管状本体の先端開口と前記フランジ
部との間において、前記管状本体の内側空間の側
に形成された開口部を介して前記内側空間に面す
る如くに、前記管状本体にセンサが内蔵され、こ
のセンサの信号伝達線が保護用被覆体で被覆され
た状態で前記管状本体の壁部貫通孔を通して導び
かれている人工心臓用カニユーレに係るものであ
る。D. Structure of the invention That is, the present invention includes an opening formed on the inner space side of the tubular body between the tip opening of the tubular body having a flange portion for preventing slippage at the tip portion and the flange portion. A sensor is built into the tubular body so as to face the inner space through the tubular body, and a signal transmission line of the sensor is guided through a wall through-hole of the tubular body while being covered with a protective covering. This relates to a cannula for an artificial heart.
ホ 実施例
以下、本考案の実施例を第１図〜第４図につい
て詳細に説明する。E. Example Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 4.
本実施例によるカニユーレ２２は例えばポリ塩
化ビニルからなつていて、その基本形状自体は第
５図及び第６図に示したものとほぼ同じである
が、第１図のように、先端部２２ａにおいて開口
３２の近傍に圧力センサ２０が内蔵若しくは埋め
込まれていることが大きな特徴である。そして、
この圧力センサ２０からはカニユーレ壁部を貫通
してリード線２１またはオプテイカルフアイバが
体外に導かれ、外部のモニタ及び表示部（図示せ
ず）へ接続される。なお、リード線２１には保護
用の小径チユーブ２３が被せられている。 The cannula 22 according to this embodiment is made of polyvinyl chloride, for example, and its basic shape itself is almost the same as that shown in FIGS. 5 and 6, but as shown in FIG. A major feature is that the pressure sensor 20 is built-in or embedded near the opening 32. and,
A lead wire 21 or optical fiber is led from the pressure sensor 20 to the outside of the body through the cannula wall and connected to an external monitor and display (not shown). Note that the lead wire 21 is covered with a small diameter tube 23 for protection.
センサ２０は、第２図に拡大図示するように、
カニユーレ２２の管状本体内に面する如くにカニ
ユーレ先端部２２ａに埋め込まれた状態になつて
いて、シリコン基板２４に設けた圧力センサ部
（拡散型シリコン半導体トランスデユーサ、ピエ
ゾ抵抗素子部または容量型圧マイクロセンサ）２
５が小通路２６を通して大気圧（即ち、外部圧）
側に臨んでいる一方、基板２４はステンレスブロ
ツク２７の凹部に固定され、更に受圧部側が接着
性シリコーンゴム２８で固められ、更にこのシリ
コーンゴム２８は開口３１を介してカニユーレ内
に面している。従つて、カニユーレ先端部２２ａ
を第３図のように例えば目的とする心房または血
管２９に挿入し、抜け止め用のフランジ部３０の
近傍位置で血管２９をカニユーレ２２に対し固定
して用いるとき、カニユーレ２２自体は本来の人
工心臓への血液導出又は導入作用を行う（第５図
及び第６図参照）と同時に、その先端のセンサ２
０によつて血管２９内の血圧（実質圧）も直接測
定することができることになる。 The sensor 20, as shown in an enlarged view in FIG.
It is embedded in the cannula tip 22a so as to face inside the tubular body of the cannula 22, and is provided with a pressure sensor section (diffusion type silicon semiconductor transducer, piezoresistive element section, or capacitive type) on the silicon substrate 24. Pressure microsensor) 2
5 passes through the small passage 26 to atmospheric pressure (i.e. external pressure).
On the other hand, the substrate 24 is fixed in the recess of the stainless steel block 27, and the pressure receiving part side is further hardened with adhesive silicone rubber 28, and this silicone rubber 28 faces into the cannula through the opening 31. . Therefore, the cannula tip 22a
When the cannula 22 is inserted into the target atrium or blood vessel 29 as shown in FIG. At the same time, the sensor 2 at the tip performs the action of leading or introducing blood to the heart (see Figures 5 and 6).
0 also allows the blood pressure (real pressure) in the blood vessel 29 to be directly measured.
このように、本実施例によれば、カニユーレ２
２自体に血圧測定機能をもたしめているので、従
来のように別途センサ付きカテーテルを差し込む
必要は全くない。従つて、外部からの感染症の心
配がなく、血圧を正確に測定できると同時にその
作業も非常に容易である。また、センサ部がカニ
ユーレの管状本体の内側空間（即ち、血液流路）
側に面するように設けているので、血流が直接衝
突してセンサ部が損傷されることがなく、安定し
た測定が可能となる。しかも、カニユーレの外側
面にセンサが面していないので、生体にカニユー
レを挿入するときに邪魔にならず、スムーズに操
作できる。 In this way, according to this embodiment, the cannula 2
2 itself has a blood pressure measurement function, so there is no need to insert a separate catheter with a sensor as in the past. Therefore, there is no need to worry about external infections, blood pressure can be measured accurately, and the work is very easy. In addition, the sensor portion is located in the inner space of the tubular body of the cannula (i.e., the blood flow path).
Since it is provided so as to face the side, the sensor part is not damaged due to direct collision with blood flow, and stable measurement is possible. Moreover, since the sensor does not face the outer surface of the cannula, it does not get in the way when inserting the cannula into a living body, allowing smooth operation.
なお、本考案の構成に対し第４図のように、セ
ンサ２０はカニユーレ先端部２２ａにおいて外向
きに（即ち、受圧部が外向きに）設けることも考
えられる。この場合は、第３図から理解されるよ
うに、血管２９内の血圧をより直接的に測定でき
る。なお、センサ２０は外向きではなく、先端方
向を向いていることも考えられるが、この場合で
も血圧測定を直接的に行える。しかしながら、セ
ンサ２０を上記のように外向き又は先端方向に向
けた場合は、生体内の血流がセンサに対して直接
衝突することになり、その衝撃でセンサが損傷す
ることがある。しかも、カニユーレを生体内に挿
入するときにセンサが邪魔になり、引つ掛かつた
りして操しずらいことがある。 In addition, in the configuration of the present invention, as shown in FIG. 4, it is also possible to provide the sensor 20 at the cannula tip 22a facing outward (that is, with the pressure receiving part facing outward). In this case, as understood from FIG. 3, the blood pressure within the blood vessel 29 can be measured more directly. It is also possible that the sensor 20 faces toward the distal end rather than outward, but even in this case blood pressure measurement can be performed directly. However, when the sensor 20 is oriented outward or toward the distal end as described above, the blood flow within the body will directly collide with the sensor, and the sensor may be damaged by the impact. Furthermore, when inserting the cannula into a living body, the sensor may get in the way and get stuck, making it difficult to manipulate.
以上、本考案を例示したが、上述の実施例は本
考案の技術的思想に基いて更に変形が可能であ
る。 Although the present invention has been illustrated above, the embodiments described above can be further modified based on the technical idea of the present invention.
例えば、使用するセンサの種類は目的に応じて
圧力センサ以外にも温度センサ、流量センサ、イ
オンセンサ等としてよいし、その固定（埋め込
み）位置等も上述の例に限られることはない。 For example, the type of sensor used may be a temperature sensor, a flow rate sensor, an ion sensor, etc. in addition to the pressure sensor depending on the purpose, and the position where it is fixed (embedded) etc. is not limited to the above example.
ヘ 考案の作用効果
本考案は上述した如く、カニユーレ先端部の開
口近傍にセンサを内蔵したので、従来のように別
途センサ付きカテーテルを差し込む必要は全くな
く、従つて、感染症の心配なしに血圧を正確に測
定できると同時にその作業も非常に容易となる。
また、センサがカニユーレの管状本体の内側空間
側に面するように設けているので、流体が直接衝
突してセンサ部が損傷されることがなく、安定し
た測定が可能となる。センサの信号伝達線が被覆
体で保護されていることも、安定した測定を更に
確実にしている。しかも、カニユーレの外側面又
は先端面にセンサが面していないので、生体にカ
ニユーレを挿入するときに邪魔にならず、スムー
ズに操作できる。更に、センサの位置をカニユー
レの抜け止め用フランジ部と先端開口との間とし
ているので、カニユーレを生体に挿入、固定した
ときに、カニユーレを確実に生体に固定できると
同時にセンサを容易かつ確実に目的の位置に配置
することができる。F. Effects of the invention As mentioned above, this invention has a built-in sensor near the opening at the tip of the cannula, so there is no need to insert a separate catheter with a sensor unlike in the past, and therefore blood pressure can be adjusted without worrying about infection. can be measured accurately and at the same time, the work is also very easy.
Further, since the sensor is provided so as to face the inner space side of the tubular body of the cannula, the sensor portion is not damaged due to direct collision with the fluid, and stable measurement is possible. The fact that the signal transmission line of the sensor is protected by a sheath also further ensures stable measurements. Moreover, since the sensor does not face the outer surface or the distal end surface of the cannula, it does not get in the way when inserting the cannula into a living body and can be operated smoothly. Furthermore, since the sensor is located between the cannula's retaining flange and the tip opening, when the cannula is inserted and fixed into the living body, the cannula can be securely fixed to the living body, and at the same time, the sensor can be easily and reliably fixed. It can be placed in the desired position.
第１図〜第３図は本考案の実施例を示すもので
あつて、第１図はカニユーレの要部断面図、第２
図はカニユーレに内蔵のセンサの拡大断面図、第
３図はカニユーレ使用状態の断面図、である。第
４図は本考案の比較例によるカニユーレの先端部
の断面図である。第５図〜第６図は従来例を示す
ものであつて、第５図は血液ポンプ装置の使用状
態を示す概略図、第６図は同血液ポンプ装置の分
解斜視図である。
なお、図面に示す符号において、１１……血液
ポンプ装置、１２，２２……カニユーレ、１３…
…コネクタ、２０……圧力センサ、２１……リー
ド線、２３……小径チユーブ、２４……基板、２
５……センサ部、２８……シリコーンゴム、２９
……血管、３１……開口、３２……先端開口、で
ある。
1 to 3 show an embodiment of the present invention, in which FIG. 1 is a sectional view of the main part of the cannula, and FIG.
The figure is an enlarged sectional view of a sensor built into the cannula, and FIG. 3 is a sectional view of the cannula in use. FIG. 4 is a sectional view of the tip of a cannula according to a comparative example of the present invention. 5 and 6 show a conventional example, in which FIG. 5 is a schematic view showing the state of use of the blood pump device, and FIG. 6 is an exploded perspective view of the same blood pump device. In addition, in the symbols shown in the drawings, 11... blood pump device, 12, 22... cannula, 13...
... Connector, 20 ... Pressure sensor, 21 ... Lead wire, 23 ... Small diameter tube, 24 ... Board, 2
5...Sensor part, 28...Silicone rubber, 29
... blood vessel, 31 ... opening, 32 ... tip opening.
Claims (1)
本体の先端開口と前記フランジ部との間におい
て、前記管状本体の内側空間の側に形成された開
口部を介して前記内側空間に面する如くに、前記
管状本体にセンサが内蔵され、このセンサの信号
伝達線が保護用被覆体で被覆された状態で前記管
状本体の壁部貫通孔を通して導びかれている人工
心臓用カニユーレ。 Between the tip opening of a tubular body having a flange portion for preventing slippage at the tip portion and the flange portion, such that the tubular body faces the inner space through an opening formed on the inner space side of the tubular body. . A cannula for an artificial heart, wherein a sensor is built into the tubular body, and a signal transmission line of the sensor is guided through a wall through-hole of the tubular body while being covered with a protective covering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985203524U JPH0239464Y2 (en) | 1985-12-31 | 1985-12-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985203524U JPH0239464Y2 (en) | 1985-12-31 | 1985-12-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62113555U JPS62113555U (en) | 1987-07-20 |
| JPH0239464Y2 true JPH0239464Y2 (en) | 1990-10-23 |
Family
ID=31168937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985203524U Expired JPH0239464Y2 (en) | 1985-12-31 | 1985-12-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0239464Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004112868A1 (en) * | 2003-06-20 | 2004-12-29 | Tohoku Electronic Industrial Co., Ltd. | Artificial heart muscle device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11253677B2 (en) * | 2017-05-31 | 2022-02-22 | Acclarent, Inc. | Navigable suction instrument with coaxial annular sensor |
| DE102018207611A1 (en) | 2018-05-16 | 2019-11-21 | Kardion Gmbh | Rotor bearing system |
| DE102018208538A1 (en) * | 2018-05-30 | 2019-12-05 | Kardion Gmbh | Intravascular blood pump and process for the production of electrical conductors |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930246B2 (en) * | 1980-05-17 | 1984-07-26 | 日本電信電話株式会社 | Optical fiber submarine cable connection equipment |
| JPS59225071A (en) * | 1983-06-03 | 1984-12-18 | 日本シヤ−ウツド株式会社 | Catheter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55119738U (en) * | 1979-02-16 | 1980-08-25 | ||
| JPS5930246U (en) * | 1982-08-16 | 1984-02-24 | 株式会社東京メデイカル | Medical internal injection tube |
-
1985
- 1985-12-31 JP JP1985203524U patent/JPH0239464Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930246B2 (en) * | 1980-05-17 | 1984-07-26 | 日本電信電話株式会社 | Optical fiber submarine cable connection equipment |
| JPS59225071A (en) * | 1983-06-03 | 1984-12-18 | 日本シヤ−ウツド株式会社 | Catheter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004112868A1 (en) * | 2003-06-20 | 2004-12-29 | Tohoku Electronic Industrial Co., Ltd. | Artificial heart muscle device |
| JPWO2004112868A1 (en) * | 2003-06-20 | 2006-07-27 | 東北電子産業株式会社 | Artificial myocardial device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62113555U (en) | 1987-07-20 |
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