JPH01285243A - Catheter - Google Patents
CatheterInfo
- Publication number
- JPH01285243A JPH01285243A JP63117406A JP11740688A JPH01285243A JP H01285243 A JPH01285243 A JP H01285243A JP 63117406 A JP63117406 A JP 63117406A JP 11740688 A JP11740688 A JP 11740688A JP H01285243 A JPH01285243 A JP H01285243A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- blood
- physiological saline
- thermistor
- temp
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims abstract description 29
- 239000002504 physiological saline solution Substances 0.000 claims abstract description 23
- 239000008280 blood Substances 0.000 abstract description 21
- 210000004369 blood Anatomy 0.000 abstract description 21
- 208000007536 Thrombosis Diseases 0.000 abstract description 20
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 13
- 210000004204 blood vessel Anatomy 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 description 12
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Measuring And Recording Apparatus For Diagnosis (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はカテーテルに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to catheters.
一般に、血管等に血栓が生ずれば、血行障害等が生じ、
人体に対して悪影響を及ぼすので、その血栓が生じてい
る部位を発見して、その血栓の摘除をせねばならない。Generally, when a thrombus forms in a blood vessel, it causes blood circulation disorder, etc.
Since it has a negative effect on the human body, it is necessary to discover the site where the thrombus is occurring and remove the thrombus.
しかして、この血栓の生じている部位を検知するには、
カテーテル形ファイバスコープを血管に挿入して、観察
したり等していた。However, in order to detect the site where this thrombus is occurring,
A catheter-type fiberscope was inserted into the blood vessel for observation.
従って、その検知は、面倒なものであり、しかも、正確
に行えなかった。Therefore, its detection is troublesome and cannot be performed accurately.
そこで、本発明では、簡単かつ迅速に血栓の生じている
部位を検知することができるカテーテルを提供すること
を目的とする。Therefore, an object of the present invention is to provide a catheter that can easily and quickly detect a site where a thrombus is occurring.
本発明のカテーテルは、先端部にバルーンが付設された
カテーテルであって、
該バルーンの近傍に、生理食塩水を外部へ流出する流出
口を開設し、かつ、該流出口の近傍に、外部流体の温度
を検知する外部サーミスタを付設すると共に、該流出口
へ生理食塩水を導く流体路内に、該生理食塩水の温度を
検知する内部サーミスタを付設している。The catheter of the present invention is a catheter having a balloon attached to its tip, and has an outlet near the balloon for allowing physiological saline to flow out to the outside, and has an external fluid near the outlet. An external thermistor is provided to detect the temperature of the saline, and an internal thermistor is provided in the fluid path leading the saline to the outlet.
血管等の細径管にこのカテーテルを挿入して、血栓が生
じていると思われる分岐管近傍にてバルーンを膨張させ
、該分岐管からの血液の温度を外部サーミスタにて検出
し、その後、流出口から生理食塩水を流出させて、該分
岐管からの血液に、生理食塩水を流入させ、そのときに
再び外部サーミスタにてその温度を検出すれば、流出口
から流出する生理食塩水の温度は内部サーミスタにて検
知されているので、その生理食塩水の温度と、上記血液
との温度と、生理食塩水と血液たが混合液の温度により
、分岐管に血栓が生じているか判明する。Ｉ！１１ち、
血栓が生じていれば、分岐管からの血液の量は無乃至少
量であるので、外部サーミスタにて検知された混合流体
の温度は生理食塩水の温度に接近に、血栓が生じていな
ければ、混合流体の温度は生理食塩水の温度にあまり接
近しないからである。This catheter is inserted into a small diameter tube such as a blood vessel, a balloon is inflated near the branch tube where a thrombus is thought to have occurred, and the temperature of the blood from the branch tube is detected with an external thermistor. If physiological saline flows out from the outflow port and flows into the blood from the branch pipe, and the temperature of the saline is detected again by the external thermistor at this time, the physiological saline flowing out from the outflow port will flow out. The temperature is detected by an internal thermistor, so it can be determined whether a blood clot has formed in the branch pipe based on the temperature of the saline, the temperature of the blood, and the temperature of the saline and blood mixture. . I! 11th,
If a thrombus has formed, the amount of blood from the branch tube will be nil or small, so the temperature of the mixed fluid detected by the external thermistor will be close to that of physiological saline. This is because the temperature of the mixed fluid is not very close to the temperature of saline.
以下、実施例を示す図面に基づいて本発明を詳１見する
。Hereinafter, the present invention will be explained in detail based on drawings showing embodiments.
第２図は本発明のカテーテルを示し、このカテーテルは
、先端部ｌにバルーン２が付設されている。ｒｇち、こ
のカテーテルは、第１図に示す様に、１［１ｆ−１チユ
一ブ体３と、該チューブ体３の先端部に付設されるバル
ーン２と、該チューブ体３内に挿入されると共に該バル
ーン２に膨張用流体を導入する導入チューブ４と、を備
えている。また、バルーン２は円筒状の薄ゴムからなり
、チューブ体３の先端部に外嵌され、その両端部に、ス
テンレスからなるリング体５，５が外嵌され、チューブ
体３に固着されている。そして、導入チューブ４は、先
端開口部６がチューブ体３の先端部の周壁から外部へ開
口するように、該チューブ体３に先端部が固着され、こ
の開口部６が上述のバルーン２にて被覆状とされる。FIG. 2 shows a catheter according to the invention, which has a balloon 2 attached to its distal end l. rg, as shown in FIG. and an introduction tube 4 for introducing inflation fluid into the balloon 2. The balloon 2 is made of cylindrical thin rubber and is fitted onto the tip of the tube body 3. Ring bodies 5, 5 made of stainless steel are fitted onto both ends of the balloon 2 and are fixed to the tube body 3. . The introduction tube 4 has its distal end fixed to the tube body 3 so that the distal opening 6 opens outward from the peripheral wall of the distal end of the tube body 3, and this opening 6 is connected to the balloon 2 described above. It is said to be coated.
また、チューブ体３の基端部は、第２図に示す様に、連
結部材７が付設され、該連結部材７がら分岐管８． ９
．１０．１１が分岐されている。Further, as shown in FIG. 2, a connecting member 7 is attached to the proximal end of the tube body 3, and a branch pipe 8. 9
．． 10.11 has been branched.
そして、上記導入チューブ４の基端部は連結部材７を介
して、分岐管９に挿入され、注射器等のバルーン膨張用
流体源１２に連結される。即ち、流体源１２から膨張用
流体を導入チューブ４に導入すれば、先端開口部６から
その流体はバルーン２内に注入され、該バルーン２は第
１図の仮想線の如く膨張する。なお、バルーン膨張用流
体とは炭酸ガス等である。The proximal end of the introduction tube 4 is inserted into the branch pipe 9 via the connecting member 7 and connected to a balloon inflation fluid source 12 such as a syringe. That is, when inflation fluid is introduced into the introduction tube 4 from the fluid source 12, the fluid is injected into the balloon 2 from the tip opening 6, and the balloon 2 is inflated as shown by the imaginary line in FIG. Note that the balloon inflation fluid is carbon dioxide or the like.
しかして、このチューブ体３には、第１図に示す様に、
外部へ生理食塩水を流出する流出口１３がバルーン２よ
り僅かに基端側へ後退した部位に開設されている。［！
１ち、この流出口１３は、細径チューブ体３内に挿入さ
れて、先端開口部が該チューブ体３の周壁から外部へ開
口するように、該チューブ体３に固着されるチューブ１
５の該先端開口部をもって形成され、また、このチュー
ブ１５をもって流出口１３へ生理食塩水を導く流体路１
６が形成される。そして、このチューブ１５の基端部は
連結部材７を介して分岐管８に挿入され、生理食塩水源
１７に連結される。従って、生理食塩水源１７からチュ
ーブ１５に生理食塩水を注水すれば、その生理食塩水は
、流体路１６を介して流出口１３から流出することにな
る。Therefore, as shown in FIG. 1, this tube body 3 has
An outflow port 13 for outflowing physiological saline to the outside is provided at a location slightly retracted from the balloon 2 toward the proximal end. [!
First, this outlet 13 is inserted into the small-diameter tube body 3 and is fixed to the tube body 3 so that the tip opening opens from the peripheral wall of the tube body 3 to the outside.
A fluid path 1 is formed with the distal end opening of 5 and leads the saline to the outlet 13 with this tube 15.
6 is formed. The proximal end of the tube 15 is inserted into the branch pipe 8 via the connecting member 7 and connected to the physiological saline source 17. Therefore, when saline is injected into the tube 15 from the saline source 17, the saline will flow out from the outlet 13 via the fluid path 16.
また、流出口１３の近傍（つまり、該流出口１３から僅
かに基端側へ後退した部位）に、外部流体の温度を検出
する外部サーミスタ１４を、付設している。即ち、外部
サーミスタ１４は、細径チューブ体３の周壁に露出状に
固着され、チューブ体３に挿入された接続部材１８を介
して、分岐管１１の基端に設けられた検知部１９に接続
される。Further, an external thermistor 14 for detecting the temperature of the external fluid is attached near the outflow port 13 (that is, at a portion slightly retreated from the outflow port 13 toward the proximal end side). That is, the external thermistor 14 is fixed to the circumferential wall of the small-diameter tube body 3 in an exposed manner, and is connected to the detection section 19 provided at the proximal end of the branch pipe 11 via the connecting member 18 inserted into the tube body 3. be done.
そして、上記チューブ１５内には、チューブ１５内の生
理食塩水の温度を検出する内部サーミスタ２０を付設し
ている。！ａ１ち、この内部サーミスタ２０は、チュー
ブ１５内の所定部位（外部サーミスタ１４より僅かに基
端側へ後退した部位）に固定され、チューブ１５に挿入
された接続部材２１を介して、分岐管ＩＯの基端に設け
られた検出部２２に接続される。つまり、流出口１３へ
生理食塩水を導く流体路１６内に、該生理食塩水の温度
が検知されることになる。An internal thermistor 20 is attached inside the tube 15 to detect the temperature of the physiological saline inside the tube 15. ! a1, this internal thermistor 20 is fixed to a predetermined location within the tube 15 (a location slightly retracted toward the proximal end side from the external thermistor 14), and is connected to the branch pipe IO via a connecting member 21 inserted into the tube 15. The sensor is connected to a detection section 22 provided at the base end of the sensor. In other words, the temperature of the saline is detected within the fluid path 16 that leads the saline to the outlet 13.
しかして、上述の如く構成されたカテーテルにて、第３
図に示す様な血管２３等の分岐管２３ａに血栓が生して
いるか否かを調べるには、カテーテルの先端部ｌを、画
側の如く、分岐管２３ａより僅かに上流まで挿入し、そ
こで、バルーン膨張用流体ｌＲ１２から導入チューブ４
を介してバルーン２に膨張用流体を注入し、該バルーン
２を膨張させて、該バルーン２より上流の血液を該バル
ーン２の基端側へ流さないようにする。そして、その状
態にて、外部サーミスタ１４により、その外部の流体（
血液）の温度を検知した後、内部サーミスタ２０にて温
度が検知された生理食塩水を、流体口１３から一定量の
流量にて流出させて、分岐管２３ａからの血液に生理食
塩水を混入さＵる。そして、この状態にて、再び外部サ
ーミスタ１４により、外部の流体（血液と生理食塩水）
の温度を検知する。However, in the catheter configured as described above, the third
To check whether a thrombus is growing in a branch pipe 23a of a blood vessel 23 or the like as shown in the figure, insert the distal end l of the catheter slightly upstream of the branch pipe 23a as shown in the picture, and then , from the balloon inflation fluid lR12 to the introduction tube 4
An inflation fluid is injected into the balloon 2 through the balloon 2 to inflate the balloon 2 to prevent blood upstream from the balloon 2 from flowing toward the proximal end of the balloon 2. In this state, the external thermistor 14 controls the external fluid (
After detecting the temperature of the blood (blood), the physiological saline whose temperature was detected by the internal thermistor 20 is flowed out from the fluid port 13 at a constant flow rate, and the physiological saline is mixed into the blood from the branch pipe 23a. Let's go. In this state, the external thermistor 14 again controls the external fluid (blood and physiological saline).
Detects the temperature of
しかして、もし、分岐管２３ａに、血栓が生じていれば
、該分岐管２３ａから本流管に流れ込む血液は無乃至僅
かであるので、生理食塩水の流出後の外部サーミスタ１
４の温度は、血液の温度より生理食塩水の温度に接近し
た温度となり、また、血栓がなければ、上述の場合より
、血液の温度に接近する。つまり、分岐管２３ａの血液
の流量がわかり、分岐管２３ａの血栓の有無が判明する
ことになる。However, if a thrombus has formed in the branch pipe 23a, there will be little or no blood flowing from the branch pipe 23a into the main pipe, so the external thermistor 1 after the physiological saline has flowed out.
The temperature of No. 4 is closer to the temperature of physiological saline than the temperature of blood, and if there is no thrombus, it is closer to the temperature of blood than in the above case. In other words, the flow rate of blood in the branch pipe 23a can be determined, and the presence or absence of a thrombus in the branch pipe 23a can be determined.
なお、バルーン２を固定しているリング体５はステンレ
ス＠（Ｘ線不透過）であるので、Ｘ線を外部から照射す
れば、このリング体５の位置、つまり、カテーテルの先
端部ｌの位置がわかり、観察部位がわかる。The ring body 5 that fixes the balloon 2 is made of stainless steel (non-X-ray transparent), so if X-rays are irradiated from the outside, the position of the ring body 5, that is, the position of the distal end l of the catheter, can be detected. and the area to be observed.
次に、第４図は他の実施例を示し、この場合、バルーン
２より先端側に別の流出口２４、外部サーミスタ２５等
が設けられている。即ち、チューブ体３に上記チューブ
１５と相違するチューブ２６を挿入すると共に、該チュ
ーブ２６の先端開口部を、チューブ体３の周壁先端から
外部へ開口させて、流出口２４及び流体路２７を形成す
る。そして、外部サーミスタ２５を流出口２４より僅か
にバルーン２側へ後退した部位のチューブ体３の周壁に
露出状に固着し、さらに、このチューブ２６内に、内部
サーミスタ２日を固着している。なお、この場合、流体
路２７は、連結部材７を介して生理食塩水源（図示省略
）に接続され、外部サーミスタ２８は、接続部材２９に
接続され、また、該接続部材２９は連結部材７を介して
検知部（図示省略）に接続され、内部サーミスタ２８は
、接続部材３０に接続され、また該接続部材３０は連結
部材７を介して検知部（図示省略）に接続されている。Next, FIG. 4 shows another embodiment, in which another outlet 24, an external thermistor 25, etc. are provided on the distal end side of the balloon 2. That is, a tube 26 different from the tube 15 is inserted into the tube body 3, and the opening at the tip of the tube 26 is opened to the outside from the tip of the peripheral wall of the tube body 3, thereby forming the outlet 24 and the fluid path 27. do. An external thermistor 25 is fixed in an exposed manner to the circumferential wall of the tube body 3 at a portion slightly retreated toward the balloon 2 from the outflow port 24, and an internal thermistor 25 is also fixed in this tube 26. In this case, the fluid path 27 is connected to a physiological saline source (not shown) via the connecting member 7 , the external thermistor 28 is connected to a connecting member 29 , and the connecting member 29 is connected to the connecting member 7 . The internal thermistor 28 is connected to a connecting member 30, and the connecting member 30 is connected to a sensing portion (not shown) through a connecting member 7.
しかして、このように構成されたカテーテルにて、血管
２３の分岐管２３ａに血栓が生じているか否かを調べる
には、このカテーテルの先端部ｌを、分岐管２３ａより
僅か上流まで挿入して、このときに、両外部サーミスタ
２５．１４にて、外部流体（血液）の温度を検知し、一
定量の流量にて、各流出口２４．１３から生理食塩水を
流出すれば、もし、分岐管２３ａに血栓が生じていれば
、該分岐管２３ａからの血液は無乃至僅かであるので、
分岐管２３ａより上流と該分岐管２３ａより下流におい
ても流量の変化がなく、また、血栓が無ければ、流量に
変化があることになり、該分岐管２３ａに血栓が生じて
いるかが判明する。なお、この場合、バルーン２より基
端側は上述の実施例と同様であるので、上述の実施例と
同様な方法にても行うことができる。Therefore, in order to examine whether or not a thrombus has formed in the branch pipe 23a of the blood vessel 23 using a catheter configured in this way, the distal end l of this catheter is inserted slightly upstream of the branch pipe 23a. , At this time, if the temperature of the external fluid (blood) is detected by both external thermistors 25.14 and the physiological saline flows out from each outlet 24.13 at a constant flow rate, if the branch If a thrombus has formed in the tube 23a, there will be little or no blood from the branch tube 23a, so
If there is no change in the flow rate upstream of the branch pipe 23a and downstream of the branch pipe 23a, and if there is no thrombus, there will be a change in the flow rate, and it will be clear whether a thrombus has formed in the branch pipe 23a. In this case, since the proximal end side of the balloon 2 is the same as in the above-mentioned embodiment, the same method as in the above-mentioned embodiment can be used.
なお、本発明のカテーテルは、図示の実施例に限定され
ず、本発明の要旨を逸脱しない範囲で設計変更自由であ
り、例えば、チューブ体３内に光フアイバスコープを挿
入して、血管２３等が観察可能なものとするも自由であ
り、また、チューブ体３を使用せずに、可撓性を有する
長尺の中実体に、バルーン膨張用流体が導入される導入
路、生理食塩水のための流体路、等を形成するようにす
るも好ましい。Note that the catheter of the present invention is not limited to the illustrated embodiment, and the design may be changed without departing from the gist of the present invention. It is also free to make it observable, and also an introduction channel through which the balloon inflation fluid is introduced into the flexible elongated solid body without using the tube body 3, and a physiological saline solution. It is also preferable to form a fluid path, etc. for this purpose.
本発明のカテーテルによれば、分岐管２３ａからの本流
管への血液の流量が判明し、該分岐管２３ａの血栓の有
無を判断することができる。つまり、血流測定や、心拍
測定を行うことができ、しかも、その測定は極めて容易
でありかつ迅速に行え、さらには安全なものである。According to the catheter of the present invention, the flow rate of blood from the branch tube 23a to the main tube can be determined, and the presence or absence of a thrombus in the branch tube 23a can be determined. In other words, it is possible to measure blood flow and heart rate, and the measurements are extremely easy, quick, and safe.
第１図は本発明の°一実施例を示す要部拡大断面図、第
２図は全体の側面図、第３図は使用状態を示す側面図、
第４図は他の実施例を示す要部拡大断面図である。
ｌ・・・先端部、２・・・バルーン、１３・・・流出口
、１４・・・外部サーミスタ、１６・・・流体路、２０
・・・内部サーミスタ。Fig. 1 is an enlarged cross-sectional view of essential parts showing one embodiment of the present invention, Fig. 2 is an overall side view, and Fig. 3 is a side view showing the state of use.
FIG. 4 is an enlarged sectional view of main parts showing another embodiment. l... Tip, 2... Balloon, 13... Outlet, 14... External thermistor, 16... Fluid path, 20
...Internal thermistor.
Claims (1)
、 該バルーンの近傍に、生理食塩水を外部へ流出する流出
口を開設し、かつ、該流出口の近傍に、外部流体の温度
を検知する外部サーミスタを付設すると共に、該流出口
へ生理食塩水を導く流体路内に、該生理食塩水の温度を
検知する内部サーミスタを付設したことを特徴とするカ
テーテル。[Scope of Claims] 1. A catheter having a balloon attached to its distal end, which has an outlet near the balloon for allowing physiological saline to flow out to the outside, and near the outlet, A catheter characterized in that an external thermistor that detects the temperature of the external fluid is attached, and an internal thermistor that detects the temperature of the physiological saline is attached in a fluid path that guides the physiological saline to the outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63117406A JPH01285243A (en) | 1988-05-13 | 1988-05-13 | Catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63117406A JPH01285243A (en) | 1988-05-13 | 1988-05-13 | Catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01285243A true JPH01285243A (en) | 1989-11-16 |
Family
ID=14710858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63117406A Pending JPH01285243A (en) | 1988-05-13 | 1988-05-13 | Catheter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01285243A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5743260A (en) * | 1990-08-22 | 1998-04-28 | Nellcor Puritan Bennett Incorporated | Fetal pulse oximetry apparatus and method of use |
-
1988
- 1988-05-13 JP JP63117406A patent/JPH01285243A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5743260A (en) * | 1990-08-22 | 1998-04-28 | Nellcor Puritan Bennett Incorporated | Fetal pulse oximetry apparatus and method of use |
| US6671530B2 (en) | 1990-08-22 | 2003-12-30 | Nellcor Puritan Bennett Incorporated | Positioning method for pulse oximetry fetal sensor |
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