JP4025099B2 - Dialysis probe - Google Patents

Dialysis probe Download PDF

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Publication number
JP4025099B2
JP4025099B2 JP2002069245A JP2002069245A JP4025099B2 JP 4025099 B2 JP4025099 B2 JP 4025099B2 JP 2002069245 A JP2002069245 A JP 2002069245A JP 2002069245 A JP2002069245 A JP 2002069245A JP 4025099 B2 JP4025099 B2 JP 4025099B2
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Prior art keywords
tube
pipe
inflow
outflow
dialysis
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JP2003265603A (en
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正寿 瀧田
勝信 山本
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National Institute of Advanced Industrial Science and Technology AIST
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National Institute of Advanced Industrial Science and Technology AIST
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Description

【0001】
【発明の属する技術分野】
本発明は、人体に対する透析や、脳機能の監視等に利用される透析プローブに関する。
【0002】
【従来の技術】
微少な透析プローブは、一般に、人体に刺入されて透析に用いられているのみならず、緊急医療において昏睡状態の脳組織に刺入されて、人体に刺入された外管内の物質を経時的に灌流させて分析し脳機能を監視することにも用いられている。そのような透析プローブは、同一箇所の脳内物質、組成などの経時的分析を可能にしている。
【0003】
この種の透析プローブの1つとして、図5に示すように、外管52と、この外管52に透析用の灌流液を流入させる流入管54と、外管52内の灌流液を流出させる流出管56とをY字状に形成されたつまみ部58に結合させて、臨機応変性の高い緊急医療現場のニーズを高めたプローブ50がある。
【0004】
透析プローブ50において、外管52は一端部に透析膜管60を有しており、透析膜管60の末端は閉鎖端とされている。つまみ部58は、接着剤やプラスチックのように接着性及び固化性を有する素材を用いて、外管52、流入管54及び流出管56を分離不能に一体的に結合させている。流入管54及び流出管56は、それぞれ、灌流液の流入口62及び流出口64に連通されている。
【0005】
透析プローブ50においては、灌流液は、図6(A)に示すように、外管52が脳組織66に所定の深さに刺入された状態で、流入口62から流入管54を経て外管52に注入される。透析は透析膜管60を介して行われ、外管50内の灌流液は流出管56を経て流出口54から流出される。流出した灌流液は、脳機能の監視に用いられる。
【0006】
この種の透析プローブにおいては、外管52を脳組織66に刺入した状態に長時間維持する必要があることがある。しかし、このプローブにおいて灌流液が不慮の不通を起こすことがある。また、流入管54や流出管56のような灌流液の通過部が気泡により閉塞することがある。このような不慮の不通や気泡が透析や脳監視の妨げになるから、そのような場合には、図6(B)及び(C)に示すように、脳組織66に対し透析プローブ50の抜き刺しを行って、灌流液の通過部に残留する気泡を除去する作業が行われる。
【0007】
【発明が解決しようとする課題】
しかし、上記のような透析プローブ50は、以下のような種々の問題を有している。
【0008】
第1に、灌流液の通過部、特に流入管54及び流出管56が外管52及びつまみ部58内に位置されているから、透析プローブを脳組織66から抜き取っても、外管52が固定されているので、不通部の検出、修復が困難であり、また灌流液の通過部に残留する空気を除去する作業が繁雑であり、そのような空気の除去作業が難しい。
【0009】
第2に、透析プローブ50を脳組織66に対して抜き刺しする際に、図6(B)及び(C)に示すように、前回の刺入箇所68と同じ箇所に再刺入することが難しく、むしろ前回の刺入箇所68と異なる箇所に刺入することが多い。このため、特に脳組織66に与えるダメージが大きい。
【0010】
第3に、透析プローブ50を脳組織66に刺入した状態に長期間留置しておくと、図7に示すように、Y字状のつまみ部58、特に上部のV字部分が脳組織66から大きく突出するため、人体や台車のような移動体が頭蓋からの突出部に当たるおそれがあり、危険である。したがって、透析プローブ50のV字部分にキャップ70をかけて透析プローブ50を衛生的に維持し、キャップ70を大きなカバー72で保護しなければならず、透析プローブ50を長期間刺入状態に留置しておくことに不便である。
【0011】
第4に、上記のような長期的留置において、つまみ部上部58のV字部分が外気との接触面積を大きくするから、透析プローブ50の衛生的維持が困難であり、したがって透析プローブ50の長期的留置にはある程度の習熟が要求される。
【0012】
本発明の目的は、灌流液通過箇所が不通を起こしても修復が容易であり、また、残留する空気の除去を容易にすると共にプローブの刺入による脳組織へのダメージを最小にし、長期的留置を可能にするとともにその間の衛生的維持を容易な透析プローブを提供することにある。
【0013】
【課題を解決するための手段】
すなわち本発明は、一端が開放されかつ他端部に透析膜管領域を有する外管と、該外管への灌流液の流入を許す流入管と、前記外管内からの灌流液の流出を許す流出管と、前記流入管に連通する灌流液流入口を有すると共に、前記流出管に連通する灌流液流出口を有して前記流入管と流出管とを固定したつまみ部を設け、前記外管の一端部は前記つまみ部の下部に取り外し可能に結合されていることを特徴とする透析プローブを提供するものである。
【0014】
【発明の実施の形態】
本発明に係る透析プローブにおいては、透析時前述のように上記の状態で、外管が人体、例えば脳組織に刺入され、その状態で灌流液が流入口から流入管を経て外管の先端部に注入される。透析は透析膜管を介して行われ、外管内の灌流液は流出管を経て流出口から外部に流出する。流出した灌流液は脳機能の監視に用いられる。
【0015】
もし、灌流液の通過部が閉塞すると、外管を脳組織に残した状態で、流入管、流出管及びつまみ部を外管から取り外して、プローブの分離部分とし、その分離部分に残留する物質又は気泡を除去することができる。その際、流入管及び流出管が外管により覆われていないから、残留物及び空気の除去が容易になる。
【0016】
残留物あるいは空気が除去された分離部分又は同種の新たな分離部分は、外管が脳組織に刺入されたまま維持されているから、従来のような透析プローブの先端部を脳組織に再度刺入することなく、分離部分を外管に結合させればよい。したがって、脳組織へのダメージが少ない。
【0017】
透析プローブの一部(特に、外管)を刺入状態におくとき、外管を脳組織に残した状態に、分離部分を外管から取り外すことができるから、外管の一部が頭蓋から突出するにすぎない。したがって、外管を長期的に留置する間、頭蓋から突出する部位が従来に比べて小さく、外管を長期的に容易に留置しておくことできるし、突出部位が小さい分、透析プローブの衛生的維持が容易になる。
【0018】
前記つまみ部は、前記外管の一端部が取り外し可能に嵌合された、弾性変形可能の保持管と、該保持管の周りに配置された補強管と、前記保持管及び前記補強管の端部を前記流入管及び前記流出管に相対的移動不能に結合させている結合体とを含むことができる。また、前記結合体は接着剤又はプラスチックを含むことができる。
【0019】
前記結合体は前記保持管及び前記補強管の側からV字状に分岐する第1及び第2の分岐部を有しており、前記流入管及び前記流出管はそれぞれ前記保持管の内側から前記第1及び第2の分岐部内を伸びていてもよい。
【0020】
前記流入管及び前記流出管は前記つまみ部内を貫通しており、前記灌流液流入口及び前記灌流液流出口は、それぞれ、前記流入管及び前記流出管の端部により形成されていてもよい。
【0021】
前記流入管は前記外管にこれの一端から突出する状態に受け入れられていてもよい。また、前記外管の一端部の前記つまみ部への結合は嵌合であってもよい。
【0022】
【実施例】
次に本発明を実施例に基づきさらに詳細に説明する。
図1及び図2を参照するに、透析プローブ10は、外管12と、この外管12に透析用の灌流液を流入させる流入管14と、外管12内の灌流液を流出させる流出管16とを、Y字状に製作されたつまみ部18に一体的に結合させている。
【0023】
外管12は、ステンレス管のような耐腐食性を有する材料で、通常0.23mm程度の外径寸法を有する円形の断面形状に形成されており、また上端部においてつまみ部18に取り外し可能に結合されている。
【0024】
外管12は、下端が閉鎖端とされた透析膜管20を下端部に備えている。透析膜管20は、接着剤22等により外管12に固定されている。透析膜管20は、外管12よりやや小さい直径寸法を有する。
【0025】
流入管14と流出管16とは、シリカチューブのように、適宜な材料により通常0.1mm程度の内径寸法を有する細管の形に製作されており、またつまみ部18に支持されている。
【0026】
つまみ部18は、その下部にビニール管のような弾性変形可能の保持管24と、保持管24の周りに配置された補強管26とを有する。保持管24の外径寸法は、外管12の内径寸法よりやや小さい。外管12の一端部は、保持管24の一部を弾性変形させた状態に、保持管24にこれの下端部から取り外し可能に嵌合されている。このため、流入管14、流出管16及びつまみ部18本体から外管12のみを分離させることができる。つまみ部18の本体は流入管14及び流出管16に相対的移動不能に結合させる結合体28からなる。
【0027】
保持管24及び補強管26は、ほぼ同じ長さ寸法を有しており、また上端部において結合体28の下側に結合されている。
【0028】
結合体28は、接着剤やプラスチックのように接着性及び固化性を有する素材を用いて、保持管24及び補強管26の側からV字状に分岐する第1及び第2の分岐部を有しており、また流入管14、流出管16、保持管24及び補強管26を分離不能に一体的に結合している。
【0029】
流入管14及び流出管16は、それぞれ、保持管24の内側から結合体28の第1及び第2の分岐部内を伸びるように、結合体28を貫通している。流入管14は外管12内を透析膜管20内まで伸びているが、流出管16の下端部は保持管24内にとどまっている。
【0030】
図示の例では、灌流液の流入口30及び流出口32は、それぞれ、流入管14及び流出管16の上端部により形成されている。しかし、流入口30及び流出口32にそれぞれ連通する流入路及び流出路を結合体28に形成し、流入管14及び流出管16をそれぞれ流入路及び流出路に連通させて、結合体28に組み付けてもよい。
【0031】
図示の例では、また、結合体28のV状分岐部をステンレス間のような適宜な補強管34,36により補強している。しかし、そのような補強管は必ずしも必要ではなく、補強管34,36を補強管26と一体に製作してもよい。
【0032】
透析時、透析プローブ10は、外管12とプローブの分離部分とが結合された状態で、図3(A)に示すように外管12を脳組織38に刺し込まれ、その状態で灌流液を流入口30から流入管14を経て外管12の下部に注入される。透析は透析膜管20を介して行われ、外管12内の灌流液は流出管16を経て流出口32に流出する。流出した灌流液は分析されて脳機能の監視に用いられる。
【0033】
流入管14や流出管16のような灌流液の通過部が閉塞したときは、図3(B)に示すように、外管12を脳組織38に残した状態に、流入管14、流出管16及びつまみ部18が外管12から取り外され、閉塞物が除去される。またこれにより形成されるプローブに混入した空気が除去される。その際、流入管14及び流出管16が外管12により覆われていないから、これらの作業が容易になる。
【0034】
閉塞物や残留空気が除去された分離部分又は同種の新たな分離部分は、外管12が図3(B)に示すように脳組織38に刺入されたまま維持されているから、図3(C)に示すように、透析プローブ10を脳組織38に再度刺入することなく、分離部分14,16,18を外管12に結合させればよい。したがって、脳組織38へのダメージが従来に比べ少ない。
【0035】
外管12を脳組織38に残した状態に、分離部分14,16,18を外管12から取り外すことができるから、透析プローブ10の一部、特に外管12を刺入状態においても、外管12の一部が頭蓋から突出するにすぎない。したがって、外管12を長期的に留置する間、頭蓋から突出する部位が従来に比べ小さい。
【0036】
外管12の長期的留置の間、図4に示すように、頭蓋からの突出部位にキャップ40を装着して衛生的環境を維持し、そのキャップ40を従来に比べて小さいケース又はカバー42で覆うことができる。したがって、外管12を長期間安定状態に容易に留置しておくことできるし、突出部位が小さい分、透析プローブ10の衛生的維持が従来に比べ容易になる。
【0037】
キャップ40は、ビニール管のような弾性変形可能の第1の管44と、管44の周りに配置された補強用の第2の管46と、第1及び第2の管44,46の上端部に接着された頭部48とを含むことができる。
【0038】
外管12は、例えば、一端が接着剤のような適宜な材料により閉鎖された透析管膜20を、内壁がシリコーンでコーティングをされたステンレス管の端部に差し込んで、エポキシ系の接着剤22でステンレス管に接着することにより製作することができる。
【0039】
流入管14、流出管16及びつまみ部18は、例えば、2つの補強管34,36と、保持管24を収容した補強管26とをY字状に維持し、流入管14及び流出管16を保持管26及び補強管34,36に所定の状態に通し、流入管14、流出管16、保持管24、補強管26及び補強管34,36をデンタルセメントのような接着剤で相互に接着し、その接着剤を固化させることにより、製造することができる。
【0040】
これの代わりに、流入管14、流出管16及びつまみ部18は、例えば、適宜な治具を用いて、流入管14、流出管16、保持管24、補強管26及び補強管34,36を整形型に所定の状態に維持させた状態で、その整形型に、未硬化のプラスチックを注入し、そのプラスチックを固化させることにより、製造することができる。
【0041】
いずれの場合も、流入管14及び流出管16は、又はそれらとV字部分の余分な箇所は、最終的に切除される。
【0042】
本発明の透析プローブは、分離・組立可能な微小透析プローブとできる。
【0043】
本発明は、上記実施例に限定されず、その趣旨を逸脱しない限り、種々変更することができる。
【0044】
【発明の効果】
本発明の透析プローブは、灌流液通過箇所が不通を起こしても、その修復が容易であり、また、残留する空気の除去も容易である。またその刺入による脳組織へのダメージを最小にし、プローブの長期的拘留を可能にすると共にその間の衛生的維持を容易にすることができる。
【図面の簡単な説明】
【図1】本発明に係る透析プローブの一実施例を示す断面図である。
【図2】図1に示す透析プローブを分離した状態で示す断面図であって、(A)はプローブの分離した部分を示し、(B)は外管を示す。
【図3】図1に示す透析プローブの使用状態を示す断面図であって、(A)は脳組織に刺入した状態を示し、(B)は脳組織に残された外管を示し、(C)は透析プローブを脳組織に再刺入させた状態を示す。
【図4】図1に示す透析プローブの外管を脳組織に長期間留置している状態を示す断面図である。
【図5】従来の透析プローブの一実施例を示す断面図である。
【図6】図5に示す透析プローブの使用状態を示す断面図であって、(A)は脳組織に刺入した状態を示し、(B)は脳組織に残された外管を示し、(C)は透析プローブを脳組織に再刺入させた状態を示す。
【図7】図5に示す透析プローブの外管を脳組織に長期間留置している状態を示す断面図である。
【符号の説明】
10 透析プローブ
12 外管
14 流入管
16 流出管
18 つまみ部
20 透析膜管
22 接着剤
24 保持管
26,34,36 補強管
28 結合体
30 流入口
32 流出口
38 脳組織
40 キャップ
42 カバー
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dialysis probe used for dialysis of a human body, monitoring of brain function, and the like.
[0002]
[Prior art]
In general, microdialysis probes are not only used for dialysis after being inserted into the human body, but are also used for dialysis, and are inserted into the brain tissue in a comatose state in emergency medical care, so that the substance in the outer tube inserted into the human body is time-lapsed. It is also used to monitor the brain function by performing perfusion. Such a dialysis probe enables time-dependent analysis of substances and compositions in the brain at the same location.
[0003]
As one of this type of dialysis probe, as shown in FIG. 5, an outer tube 52, an inflow tube 54 for allowing dialysis perfusate to flow into the outer tube 52, and a perfusate in the outer tube 52 are allowed to flow out. There is a probe 50 in which the outflow pipe 56 is coupled to a knob portion 58 formed in a Y shape to increase the needs of emergency medical sites with high flexibility.
[0004]
In the dialysis probe 50, the outer tube 52 has a dialysis membrane tube 60 at one end, and the end of the dialysis membrane tube 60 is a closed end. The knob portion 58 integrally connects the outer tube 52, the inflow tube 54, and the outflow tube 56 so as not to be separated by using a material having adhesiveness and solidification properties such as an adhesive or plastic. The inflow pipe 54 and the outflow pipe 56 are communicated with an inlet 62 and an outlet 64 for the perfusate, respectively.
[0005]
In the dialysis probe 50, as shown in FIG. 6 (A), the perfusate is discharged from the inflow port 62 through the inflow tube 54 with the outer tube 52 inserted into the brain tissue 66 at a predetermined depth. It is injected into the tube 52. Dialysis is performed through the dialysis membrane tube 60, and the perfusate in the outer tube 50 flows out from the outflow port 54 through the outflow tube 56. The discharged perfusate is used for monitoring the brain function.
[0006]
In this type of dialysis probe, it may be necessary to maintain the outer tube 52 inserted into the brain tissue 66 for a long time. However, the perfusate may cause inadvertent interruption in this probe. In addition, the perfusate passage such as the inflow pipe 54 and the outflow pipe 56 may be blocked by bubbles. Since such inadvertent communication and air bubbles hinder dialysis and brain monitoring, in such a case, as shown in FIGS. 6B and 6C, the dialysis probe 50 is removed from the brain tissue 66. The work of removing the bubbles remaining in the perfusate passage is performed by pricking.
[0007]
[Problems to be solved by the invention]
However, the dialysis probe 50 as described above has the following various problems.
[0008]
First, since the perfusion fluid passage, particularly the inflow tube 54 and the outflow tube 56 are located in the outer tube 52 and the knob 58, the outer tube 52 is fixed even if the dialysis probe is removed from the brain tissue 66. Therefore, it is difficult to detect and repair the non-permeability portion, and the operation of removing the air remaining in the perfusion fluid passage is complicated, and it is difficult to remove such air.
[0009]
Second, when the dialysis probe 50 is inserted into the brain tissue 66, it can be re-inserted into the same place as the previous insertion place 68, as shown in FIGS. 6B and 6C. Rather, it is often inserted at a location different from the previous insertion location 68. For this reason, damage to the brain tissue 66 is particularly large.
[0010]
Third, when the dialysis probe 50 is left in a state where the dialysis probe 50 is inserted into the brain tissue 66 for a long period of time, as shown in FIG. Therefore, it is dangerous because a moving body such as a human body or a carriage may hit the protruding portion from the skull. Therefore, the cap 70 is put on the V-shaped portion of the dialysis probe 50 to maintain the dialysis probe 50 in a sanitary manner, and the cap 70 must be protected by the large cover 72, and the dialysis probe 50 is left in the inserted state for a long time. It is inconvenient to keep.
[0011]
Fourth, in the long-term indwelling as described above, the V-shaped portion of the knob portion upper portion 58 increases the contact area with the outside air, so that it is difficult to maintain the dialysis probe 50 in a hygienic manner. A certain degree of proficiency is required for detention.
[0012]
The object of the present invention is that repair is easy even if the perfusate passage location is interrupted, and it is easy to remove residual air and minimize damage to the brain tissue due to probe insertion. An object of the present invention is to provide a dialysis probe that enables indwelling and facilitates hygiene during that time.
[0013]
[Means for Solving the Problems]
That is, the present invention permits an outer tube having one end opened and a dialysis membrane tube region at the other end, an inflow tube allowing inflow of the perfusate into the outer tube, and allowing the perfusate to flow out from the outer tube. An outer pipe that has an outflow pipe and a perfusate inlet that communicates with the inflow pipe, a perfusate outlet that communicates with the outflow pipe, and that fixes the inflow pipe and the outflow pipe; One end of the dialysis probe is detachably coupled to the lower portion of the knob portion to provide a dialysis probe.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
In the dialysis probe according to the present invention, in the above-described state during dialysis, the outer tube is inserted into a human body, for example, brain tissue, and in this state, the perfusate passes from the inflow port through the inflow tube to the distal end of the outer tube. Injected into the part. Dialysis is performed through a dialysis membrane tube, and the perfusate in the outer tube flows out from the outlet through the outflow tube. The discharged perfusate is used to monitor brain function.
[0015]
If the perfusion fluid passage is occluded, with the outer tube remaining in the brain tissue, the inflow tube, outflow tube, and knob are removed from the outer tube to form the probe separation part, and the substance remaining in the separation part Alternatively, bubbles can be removed. At this time, since the inflow pipe and the outflow pipe are not covered with the outer pipe, the residue and air can be easily removed.
[0016]
Since the separation part from which the residue or air has been removed or a new separation part of the same type is maintained with the outer tube inserted into the brain tissue, the tip of the conventional dialysis probe is again inserted into the brain tissue. What is necessary is just to couple | bond a isolation | separation part with an outer tube | pipe without inserting. Therefore, there is little damage to the brain tissue.
[0017]
When part of the dialysis probe (especially the outer tube) is inserted, the separation part can be removed from the outer tube while leaving the outer tube in the brain tissue. It only protrudes. Therefore, while the outer tube is indwelled for a long time, the portion protruding from the skull is smaller than in the conventional case, and the outer tube can be easily placed in the long term, and the dialysis probe hygiene is small because the protruding portion is small. Maintenance is easy.
[0018]
The knob portion includes an elastically deformable holding tube in which one end portion of the outer tube is detachably fitted, a reinforcing tube disposed around the holding tube, and ends of the holding tube and the reinforcing tube And a combined body in which a part is coupled to the inflow pipe and the outflow pipe in a relatively immovable manner. The combination may include an adhesive or a plastic.
[0019]
The combined body has first and second branch portions that branch in a V shape from the holding tube and the reinforcing tube side, and the inflow tube and the outflow tube are respectively formed from the inside of the holding tube. You may extend in the 1st and 2nd branch part.
[0020]
The inflow pipe and the outflow pipe may pass through the knob portion, and the perfusate inlet and the perfusate outlet may be formed by ends of the inflow pipe and the outflow pipe, respectively.
[0021]
The inflow pipe may be received in a state protruding from one end of the outer pipe. The coupling of the one end portion of the outer tube to the knob portion may be a fitting.
[0022]
【Example】
Next, the present invention will be described in more detail based on examples.
Referring to FIGS. 1 and 2, a dialysis probe 10 includes an outer tube 12, an inflow tube 14 that allows dialysis perfusate to flow into the outer tube 12, and an outflow tube that allows the perfusate in the outer tube 12 to flow out. 16 is integrally coupled to a knob portion 18 manufactured in a Y shape.
[0023]
The outer tube 12 is made of a corrosion-resistant material such as a stainless tube, and is usually formed in a circular cross-sectional shape having an outer diameter of about 0.23 mm, and can be detached from the knob portion 18 at the upper end. Are combined.
[0024]
The outer tube 12 includes a dialysis membrane tube 20 having a lower end closed. The dialysis membrane tube 20 is fixed to the outer tube 12 with an adhesive 22 or the like. The dialysis membrane tube 20 has a slightly smaller diameter dimension than the outer tube 12.
[0025]
The inflow pipe 14 and the outflow pipe 16 are made of an appropriate material in the form of a thin tube having an inner diameter of about 0.1 mm, such as a silica tube, and are supported by the knob portion 18.
[0026]
The knob portion 18 includes a holding tube 24 that is elastically deformable, such as a vinyl tube, and a reinforcing tube 26 that is disposed around the holding tube 24 at a lower portion thereof. The outer diameter of the holding tube 24 is slightly smaller than the inner diameter of the outer tube 12. One end of the outer tube 12 is detachably fitted to the holding tube 24 from a lower end thereof in a state where a part of the holding tube 24 is elastically deformed. For this reason, only the outer tube 12 can be separated from the inflow tube 14, the outflow tube 16, and the knob portion 18 main body. The main body of the knob portion 18 includes a coupling body 28 that is coupled to the inflow pipe 14 and the outflow pipe 16 so as not to move relative to each other.
[0027]
The holding tube 24 and the reinforcing tube 26 have substantially the same length and are coupled to the lower side of the coupling body 28 at the upper end.
[0028]
The bonded body 28 has first and second branch portions that branch in a V shape from the holding tube 24 and the reinforcing tube 26 using a material having adhesiveness and solidification properties such as an adhesive or plastic. In addition, the inflow pipe 14, the outflow pipe 16, the holding pipe 24, and the reinforcing pipe 26 are integrally coupled so as not to be separated.
[0029]
The inflow pipe 14 and the outflow pipe 16 penetrate the coupling body 28 so as to extend in the first and second branch portions of the coupling body 28 from the inside of the holding pipe 24, respectively. The inflow tube 14 extends in the outer tube 12 to the inside of the dialysis membrane tube 20, but the lower end portion of the outflow tube 16 remains in the holding tube 24.
[0030]
In the illustrated example, the inlet 30 and the outlet 32 of the perfusate are formed by the upper ends of the inflow pipe 14 and the outflow pipe 16, respectively. However, an inflow path and an outflow path communicating with the inflow port 30 and the outflow port 32 are formed in the coupling body 28, and the inflow pipe 14 and the outflow pipe 16 are communicated with the inflow path and the outflow path, respectively. May be.
[0031]
In the illustrated example, the V-shaped branch portion of the combined body 28 is reinforced by appropriate reinforcing pipes 34 and 36 between stainless steels. However, such a reinforcing tube is not always necessary, and the reinforcing tubes 34 and 36 may be manufactured integrally with the reinforcing tube 26.
[0032]
At the time of dialysis, the dialysis probe 10 is inserted into the brain tissue 38 as shown in FIG. 3A with the outer tube 12 and the separated portion of the probe combined, and in this state the perfusate Is injected into the lower part of the outer pipe 12 from the inlet 30 through the inlet pipe 14. Dialysis is performed through the dialysis membrane tube 20, and the perfusate in the outer tube 12 flows out to the outflow port 32 through the outflow tube 16. The discharged perfusate is analyzed and used to monitor brain function.
[0033]
When the perfusion fluid passage such as the inflow tube 14 or the outflow tube 16 is blocked, the inflow tube 14 and the outflow tube are left in the state where the outer tube 12 remains in the brain tissue 38 as shown in FIG. 16 and the knob part 18 are removed from the outer tube 12, and the obstruction is removed. Further, air mixed in the formed probe is removed. At this time, since the inflow pipe 14 and the outflow pipe 16 are not covered with the outer pipe 12, these operations are facilitated.
[0034]
Since the outer tube 12 is kept inserted in the brain tissue 38 as shown in FIG. 3B, the separation part from which the obstruction or residual air has been removed or a new separation part of the same kind is maintained. As shown in (C), the separation portions 14, 16, and 18 may be coupled to the outer tube 12 without reinserting the dialysis probe 10 into the brain tissue 38. Therefore, the damage to the brain tissue 38 is less than before.
[0035]
Since the separation portions 14, 16, and 18 can be removed from the outer tube 12 while the outer tube 12 remains in the brain tissue 38, a part of the dialysis probe 10, particularly the outer tube 12 can be removed even in the inserted state. Only a portion of the tube 12 protrudes from the skull. Therefore, while the outer tube 12 is indwelled for a long period of time, the portion protruding from the cranium is smaller than conventional.
[0036]
During long-term placement of the outer tube 12, as shown in FIG. 4, a cap 40 is attached to the protruding portion from the skull to maintain a sanitary environment, and the cap 40 is covered with a case or cover 42 that is smaller than the conventional case. Can be covered. Accordingly, the outer tube 12 can be easily left in a stable state for a long period of time, and the hygienic maintenance of the dialysis probe 10 can be facilitated as compared with the conventional case because the protruding portion is small.
[0037]
The cap 40 includes an elastically deformable first tube 44 such as a vinyl tube, a reinforcing second tube 46 disposed around the tube 44, and upper ends of the first and second tubes 44, 46. And a head 48 bonded to the portion.
[0038]
For example, the outer tube 12 is inserted with an end of a stainless steel tube whose inner wall is coated with silicone by inserting a dialysis tube membrane 20 whose one end is closed with an appropriate material such as an adhesive, and an epoxy adhesive 22. It can be manufactured by bonding to a stainless steel tube.
[0039]
The inflow pipe 14, the outflow pipe 16, and the knob 18 maintain, for example, two reinforcing pipes 34 and 36 and a reinforcing pipe 26 that holds the holding pipe 24 in a Y shape. The holding pipe 26 and the reinforcing pipes 34 and 36 are passed through a predetermined state, and the inflow pipe 14, the outflow pipe 16, the holding pipe 24, the reinforcing pipe 26 and the reinforcing pipes 34 and 36 are bonded to each other with an adhesive such as dental cement. It can be produced by solidifying the adhesive.
[0040]
Instead of this, the inflow pipe 14, the outflow pipe 16, and the knob portion 18 are made of the inflow pipe 14, the outflow pipe 16, the holding pipe 24, the reinforcing pipe 26, and the reinforcing pipes 34 and 36, for example, using an appropriate jig. It can be manufactured by injecting uncured plastic into the shaping mold while the shaping mold is maintained in a predetermined state, and solidifying the plastic.
[0041]
In any case, the inflow pipe 14 and the outflow pipe 16 or the excess portions of them and the V-shaped portion are finally cut off.
[0042]
The dialysis probe of the present invention can be a microdialysis probe that can be separated and assembled.
[0043]
The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
[0044]
【The invention's effect】
The dialysis probe of the present invention can be easily repaired even if the perfusate passage site is blocked, and the remaining air can be easily removed. In addition, damage to the brain tissue due to the insertion can be minimized, the probe can be detained for a long time, and hygiene can be easily maintained during that time.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a dialysis probe according to the present invention.
2 is a cross-sectional view showing a state where the dialysis probe shown in FIG. 1 is separated, in which (A) shows a separated part of the probe, and (B) shows an outer tube.
3 is a cross-sectional view showing a use state of the dialysis probe shown in FIG. 1, in which (A) shows a state where the dialysis probe is inserted, (B) shows an outer tube left in the brain tissue, (C) shows a state in which the dialysis probe is reinserted into the brain tissue.
4 is a cross-sectional view showing a state in which the outer tube of the dialysis probe shown in FIG. 1 is left in the brain tissue for a long period of time.
FIG. 5 is a cross-sectional view showing an example of a conventional dialysis probe.
6 is a cross-sectional view showing a use state of the dialysis probe shown in FIG. 5, in which (A) shows a state where the dialysis probe is inserted, (B) shows an outer tube left in the brain tissue, (C) shows a state in which the dialysis probe is reinserted into the brain tissue.
7 is a cross-sectional view showing a state in which the outer tube of the dialysis probe shown in FIG. 5 is left in the brain tissue for a long period of time.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Dialysis probe 12 Outer tube 14 Inflow tube 16 Outflow tube 18 Knob part 20 Dialysis membrane tube 22 Adhesive 24 Holding tube 26,34,36 Reinforcement tube 28 Conjugate 30 Inlet 32 Outlet 38 Brain tissue 40 Cap 42 Cover

Claims (7)

一端が開放されかつ他端部に透析膜管領域を有する外管と、該外管への灌流液の流入を許す流入管と、前記外管内からの灌流液の流出を許す流出管と、前記流入管に連通する灌流液流入口を有すると共に、前記流出管に連通する灌流液流出口を有して前記流入管と流出管とを固定したつまみ部を設け、前記外管の一端部は前記つまみ部の下部に取り外し可能に結合されていることを特徴とする透析プローブ。An outer tube having one end open and having a dialysis membrane tube region at the other end, an inflow tube allowing inflow of the perfusate into the outer tube, an outflow tube allowing outflow of the perfusate from within the outer tube, and A perfusion fluid inlet that communicates with the inflow pipe, a perfusion fluid outlet that communicates with the outflow pipe, and a knob portion that fixes the inflow pipe and the outflow pipe. A dialysis probe characterized in that it is detachably coupled to the lower part of the knob part. 前記つまみ部は、前記外管の一端部が取り外し可能に嵌合された、弾性変形可能の保持管と、該保持管の周りに配置された補強管と、前記保持管及び前記補強管の端部を前記流入管及び前記流出管に相対的移動不能に結合させる結合体とを含むことを特徴とする請求項1に記載の透析プローブ。The knob portion includes an elastically deformable holding tube in which one end portion of the outer tube is detachably fitted, a reinforcing tube disposed around the holding tube, and ends of the holding tube and the reinforcing tube The dialysis probe according to claim 1, further comprising: a coupling unit that couples a portion to the inflow pipe and the outflow pipe so as not to move relative to each other. 前記結合体は接着剤又はプラスチックを含むことを特徴とする請求項2に記載の透析プローブ。The dialysis probe according to claim 2, wherein the bonded body includes an adhesive or a plastic. 前記結合体は前記保持管及び前記補強管の側からV字状に分岐する第1及び第2の分岐部を有しており、前記流入管及び前記流出管は、それぞれ、前記保持管の内側から前記第1及び第2の分岐部内を伸びていることを特徴とする請求項2又は3に記載の透析プローブ。The combined body has first and second branch portions that branch in a V shape from the holding tube and the reinforcing tube side, and the inflow tube and the outflow tube are respectively inside the holding tube. The dialysis probe according to claim 2, wherein the dialysis probe extends in the first and second branch portions from the first to second branches. 前記流入管及び前記流出管は前記つまみ部を貫通しており、前記灌流液流入口及び前記灌流液流出口は、それぞれ、前記流入管の端部及び前記流出管の端部により形成されていることを特徴とする請求項1から4のいずれか1項に記載の透析プローブ。The inflow pipe and the outflow pipe pass through the knob, and the perfusate inlet and the perfusate outlet are formed by an end of the inflow pipe and an end of the outflow pipe, respectively. The dialysis probe according to any one of claims 1 to 4, wherein: 前記流入管は前記外管にこれの一端から突出する状態に受け入れられていることを特徴とする請求項1から5のいずれか1項に記載の透析プローブ。The dialysis probe according to any one of claims 1 to 5, wherein the inflow pipe is received by the outer pipe so as to protrude from one end thereof. 前記外管の一端部は前記つまみ部に嵌合されていることを特徴とする請求項1から6のいずれか1項に記載の透析プローブ。The dialysis probe according to any one of claims 1 to 6, wherein one end portion of the outer tube is fitted to the knob portion.
JP2002069245A 2002-03-13 2002-03-13 Dialysis probe Expired - Lifetime JP4025099B2 (en)

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