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JP2008120780A - Contrast agent for gastric region medical checkup - Google Patents

Contrast agent for gastric region medical checkup Download PDF

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JP2008120780A
JP2008120780A JP2006335095A JP2006335095A JP2008120780A JP 2008120780 A JP2008120780 A JP 2008120780A JP 2006335095 A JP2006335095 A JP 2006335095A JP 2006335095 A JP2006335095 A JP 2006335095A JP 2008120780 A JP2008120780 A JP 2008120780A
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contrast agent
barium
microcapsule
barium sulfate
agent
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JP2008120780A5 (en
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Kazutoyo Kawasaki
和豊 川▲崎▼
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a barium contrast agent with continuous foaming without salting out, aggregation or solidification in intestinal tract. <P>SOLUTION: Barium sulfate of a conventional gastric region medical checkup barium contrast agent 1 or a new substance for gastric check up is enclosed in non-soluble microcapsules 2. Further sodium hydrogen carbonate enclosed in acid-soluble microcapsules is mixed therein. The contrast agent can prevent stercoral feces because of no salting out, aggregation or solidification. In addition, the agent can be easily administered and continuously supports the effect of the foaming agent. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、胃部検診等に用いる造影剤の内容物に関する。
特開平06−000804 顔料マイクロカプセルとその製造方法 マイクロカプセルとは/教材/新潟大学田中研究室 新潟大学工学部化学システム工学科田中研究室(教授:田中眞人,助手:田口佳成)複合体粒子,マイクロカプセルの説明.capsule.eng.niigata−u.ac.jp/howto/ht_def/index.html マイクロカプセルとは マイクロカプセル製剤とは.マイクロカプセル製剤は有効成分を高分子樹脂の薄い膜で包み込んだ製剤です。有効成分が高分子のカプセル内に封入されているため、分解や蒸散が抑えられます。 マイクロカプセル製剤は安定性と安全性に優れます。www.nipponkayaku.co.jp/japan/kagaku/agro/microtoha.htm 日本油脂−事業案内(食品事業) 日本油脂独自で開発した“マイクロカプセル技術”は、芯物質の安定性向上、味のマスキング、吸湿防止、接触回避などを実現し、...その一つとして、ビフィズス菌のマイクロカプセルが注目されています。ビフィズス菌は酸、空気、熱に弱いことが知られて...www.nof.co.jp/depart/syokuhin.htm マイクロ/ナノ系カプセル・微粒子の開発と応用 マイクロカプセル形成の基礎2.1マイクロカプセルの調整法 (1) コアセルベーション法(2)相分離法2.2マイクロカプセル...マイクロカプセルの設計3.1金属吸着剤マイクロカプセル (1)設計概念3.2マイクロカプセルインキ (1)設計概念...www.cmcbooks.co.jp/books/t0364.php
The present invention relates to the contents of a contrast medium used for gastric examination and the like.
JP-A 06-000804 Pigment microcapsule and method for producing the same What are microcapsules? / Teaching materials / Tanaka Lab., Niigata University Tanaka Lab., Department of Chemical Systems Engineering, Niigata University (Professor: Hayato Tanaka, Assistant: Yoshinari Taguchi) Explanation of composite particles and microcapsules. capsule. eng. niigata-u. ac. jp / howto / ht_def / index. html What is a microcapsule? A microcapsule formulation is a formulation in which the active ingredient is wrapped in a thin film of polymer resin. Active ingredients are encapsulated in polymer capsules to prevent degradation and transpiration. Microcapsule formulation is excellent in stability and safety. www. nipponkayaku. co. jp / japan / kagaku / agro / microtoha. htm Nippon Oil & Fats-Business Information (Food Business) Nippon Oil &Fats' proprietary “microcapsule technology” has improved core material stability, taste masking, moisture absorption prevention, contact avoidance, etc. . . As one of them, Bifidobacteria microcapsules are attracting attention. Bifidobacteria are known to be sensitive to acid, air and heat. . . www. nof. co. jp / depart / syokuhin. htm Development and application of micro / nano-based capsules and fine particles Basics of microcapsule formation 2.1 Preparation method of microcapsules (1) Coacervation method (2) Phase separation method 2.2 microcapsules. . . Microcapsule design 3.1 Metal adsorbent microcapsules (1) Design concept 3.2 Microcapsule ink (1) Design concept. . . www. cmcbooks. co. jp / books / t0364. php

従来の胃部検診に用いるバリウム造影剤は、硫酸バリウムを水に溶いたものに味や香りを付けて飲みやすくしようと工夫されたものであった。  Conventional barium contrast agents used for gastric examination have been devised to make it easier to drink by adding taste and scent to a solution of barium sulfate dissolved in water.

しかしながら、以上の技術によれば、検診後に飲む下剤の効果が弱かった場合、特に腸管内に硫酸バリウムが長く留まることになると、起こりにくいとされていても塩析擬集効果によって固化を起こし、便秘や腸閉塞等の原因にもなる宿滞便になることがある。実際に、胃部検診時のバリウム造影剤が原因で私の同僚の1人は腸閉塞を起こし、入院手術を余儀なくされた。
さらに硫酸バリウムはその式量(233.39)、比重(4.47〜4.50)はともに大きく、胃腸にもたれる場合も多々考えられ、これが飲みにくさにもつながっている。これを解消するために、硫酸バリウムよりも式量や比重などが小さく、かつ、硫酸バリウム以外で使用されるガストログラフィンのようなヨード系造影剤などよりも安価に手に入れられる物質を造影剤として使用したくとも、胃液等に反応して造影剤としての機能を失ったり、体へ吸収されて毒性を示す可能性があると、造影剤として使用できなかった。
また、検診中に於いて胃を膨らませる発泡剤は、検診中にゲップをしてしまうと再度発泡剤の飲み直しを迫られることが度々あった。
そこで、この発明は、腸管内で塩析凝集固化することのないバリウム造影剤を提供することと、硫酸バリウムに代わる物質を使用した造影剤を提供すること、発泡剤の効果持続させることを提供することを課題とする。
However, according to the above technique, when the effect of laxatives taken after the examination is weak, especially when barium sulfate stays in the intestinal tract for a long time, it causes solidification by the salting-out pseudo-collection effect even if it is difficult to occur, May cause stagnation, which may cause constipation and bowel obstruction. In fact, one of my colleagues suffered from bowel obstruction due to barium contrast at the time of a gastric examination and was forced to undergo hospitalization.
Furthermore, barium sulfate has a large formula weight (233.39) and specific gravity (4.47 to 4.50), and it is often considered to lean against the gastrointestinal tract, which leads to difficulty in drinking. In order to solve this problem, the contrast agent is a substance that has a smaller formula weight and specific gravity than barium sulfate and can be obtained at a lower cost than iodine-based contrast agents such as gastrografin used other than barium sulfate. However, it could not be used as a contrast agent if it may lose its function as a contrast agent in response to gastric juice or the like or may be absorbed by the body and exhibit toxicity.
In addition, the foaming agent that swells the stomach during a medical examination often requires the user to retake the foaming agent again if a gob is applied during the medical examination.
Therefore, the present invention provides a barium contrast agent that does not cause salting-out aggregation and solidification in the intestinal tract, provides a contrast agent that uses a substance that replaces barium sulfate, and maintains the effect of the foaming agent. The task is to do.

以上の課題を解決するために、第一発明は、硫酸バリウムを非溶性マイクロカプセルに封入したものに置き換えたことを特徴とする胃部検診用バリウム造影剤である。
次に第二発明は、硫酸バリウムの代わりにヨウ化鉄やヨウ化ナトリウム、ヨウ化カリウムなどを非溶性マイクロカプセルに封入したものに置き換えたことを特徴とする胃部検診用バリウム造影剤である。
また、第三発明は、発泡剤の炭酸水素ナトリウム顆粒を酸溶解性マイクロカプセルに封入したものを先の発明の造影剤に混合することを特徴とする胃部検診用バリウム造影剤である。
In order to solve the above problems, the first invention is a barium contrast agent for gastric examination characterized by replacing barium sulfate with an insoluble microcapsule.
Next, the second invention is a barium contrast agent for gastric screening characterized by replacing iron iodide, sodium iodide, potassium iodide, etc. in an insoluble microcapsule instead of barium sulfate. .
The third invention is a barium contrast agent for gastric examination characterized in that sodium bicarbonate granules as a foaming agent are encapsulated in acid-soluble microcapsules and mixed with the contrast agent of the previous invention.

第一発明によれば、硫酸バリウムが、腸管内で塩析凝集固化することのない非溶性マイクロカプセルに封入されることによって宿滞便化することを防ぐことができる造影剤になる。次に、第二発明によれば、従来よりも飲みやすく胃腸に負担をかけにくい効果を期待できる造影剤になる。また、第三発明によれば、発泡剤の効果を連続的に補助できる造影剤になる。  According to the first invention, barium sulfate becomes a contrast agent capable of preventing stagnation by being encapsulated in an insoluble microcapsule that does not undergo salting out aggregation and solidification in the intestinal tract. Next, according to the second invention, it is a contrast agent that can be expected to have an effect of being easier to drink and less burdening the gastrointestinal than conventionally. Moreover, according to 3rd invention, it becomes a contrast agent which can assist the effect of a foaming agent continuously.

この発明の一実施形態を、図1および図2に示す。
第一発明によるマイクロカプセルの製法に関しては既存技術であり、懸濁コロイド溶液になる大きさの粒子径の外殻になる非溶性マイクロカプセルに、硫酸バリウムを芯物質として封入したものである。
第二発明による芯物質に関しては既知の物質であり、硫酸バリウムの代わりにヨウ化鉄やヨウ化ナトリウム、ヨウ化カリウムなどを芯物質として非溶性マイクロカプセルに封入したものである。
第三発明によるマイクロカプセルの製法に関しても既存技術であり、懸濁コロイド溶液になる大きさの粒子径の外殻になる酸溶解性マイクロカプセルに、炭酸水素ナトリウムを芯物質として封入したものである。
One embodiment of the present invention is shown in FIGS.
The manufacturing method of the microcapsule according to the first invention is an existing technique, in which barium sulfate is encapsulated as a core substance in an insoluble microcapsule having a particle diameter of a size that becomes a suspended colloidal solution.
The core material according to the second invention is a known material, and iron iodide, sodium iodide, potassium iodide or the like is sealed in an insoluble microcapsule as a core material instead of barium sulfate.
The manufacturing method of the microcapsule according to the third invention is also an existing technology, in which sodium hydrogen carbonate is encapsulated as a core substance in an acid-soluble microcapsule that becomes an outer shell of a particle size that becomes a suspended colloidal solution. .

「実施形態の効果」
この実施形態によれば、非溶性マイクロカプセルに芯物質として封入された硫酸バリウムによって胃部検診に使用されるX線を吸収遮蔽し、現在行われている検診方法を妨げるものではない。さらに、非溶性マイクロカプセルによって硫酸バリウムの塩析凝集効果が起こらない状態にある。したがって、検査後の宿滞便による腸閉塞を引き起こす心配を下げることができる。
この上で、非溶性マイクロカプセルに芯物質として封入されたヨウ化鉄やヨウ化ナトリウム、ヨウ化カリウムなどによって硫酸バリウムと同等の造影効果が期待でき、現在おこなわれている検診方法を妨げるものではない。さらに、非溶性マイクロカプセルによって胃液等と芯物質が反応したり、体内へ吸収されたりする危険もない状態にできる。ただし、ここで示したヨウ化鉄やヨウ化ナトリウム、ヨウ化カリウムなどは、万一、マイクロカプセルが破損し芯物質が胃腸管内に流出した場合でも、体毒性を低く抑えることを考慮できるものとして提案するものである。非溶性マイクロカプセルの芯物質保護効果がさらに安定し信頼性が増せば、芯物質として、鉛など体毒性を示すような物質や重金属を芯物質として使用することも可能であると考えるが、現段階では可能性としておく。
また、酸溶解性マイクロカプセルは胃液の酸に反応して溶解し、芯物質の炭酸水素ナトリウムが胃の中に開放され、これが胃液と反応することによって連続的に二酸化炭素の気泡を胃の中に提供してくれるはたらきをする。
"Effect of the embodiment"
According to this embodiment, barium sulfate encapsulated in an insoluble microcapsule as a core material absorbs and shields X-rays used for gastric examination, and does not hinder the currently performed examination method. Furthermore, the insoluble microcapsules are in a state where the salting-out aggregation effect of barium sulfate does not occur. Therefore, it is possible to reduce the worry of causing intestinal obstruction due to stool after inspection.
On top of this, iron iodide, sodium iodide, potassium iodide, etc. encapsulated in the insoluble microcapsule as a core substance can be expected to provide the same contrast effect as barium sulfate, which does not interfere with the current screening method. Absent. Furthermore, the insoluble microcapsules can be in a state in which there is no danger of gastric juice or the like reacting with the core substance or being absorbed into the body. However, the iron iodide, sodium iodide, potassium iodide, etc. shown here can be considered to keep body toxicity low even if the microcapsule is broken and the core substance flows into the gastrointestinal tract. It is what we propose. If the core substance protection effect of insoluble microcapsules is further stabilized and the reliability is increased, it is possible to use a substance that exhibits body toxicity, such as lead, or heavy metals as the core substance. It is possible at the stage.
In addition, acid-soluble microcapsules dissolve in response to acid in the gastric juice, and the core substance, sodium bicarbonate, is released into the stomach, which reacts with the gastric juice to continuously remove carbon dioxide bubbles in the stomach. To serve you.

「他の実施形態」
図1の実施形態では、非溶性マイクロカプセルに封入される芯物質として硫酸バリウムと、これに代わるヨウ化鉄やヨウ化ナトリウム、ヨウ化カリウムなどを考案したが、他の実施形態では、今後の研究によっては、今提案以外の造影剤の有効な物質を、非溶性マイクロカプセルの芯物質として封入したものでも良い。
図2の実施形態では、酸溶解性マイクロカプセルを考案したが、他の実施形態では、個人によってはこれを必要としない形態も考えられるし、酸溶解性マイクロカプセルの代わりに油脂マイクロカプセルに換えたものを使うと、腸内での二酸化炭素気泡を提供する形態も考えられる。このように応用を利かせたものでも良い。
"Other embodiments"
In the embodiment of FIG. 1, barium sulfate and iron iodide, sodium iodide, potassium iodide and the like are devised as a core material enclosed in the insoluble microcapsule. However, in other embodiments, in the future, Depending on the research, an effective substance of a contrast agent other than the currently proposed one may be encapsulated as a core substance of an insoluble microcapsule.
In the embodiment of FIG. 2, an acid-soluble microcapsule has been devised, but in other embodiments, some individuals may not need this, and instead of an acid-soluble microcapsule, an oil-and-fat microcapsule may be used. When using a bowl, a form of providing carbon dioxide bubbles in the intestine is also conceivable. It is also possible to use such an application.

集団検診、人間ドック等、胃腸科検診時の活用。ペットの検診への拡大利用の可能性を追及されることが考えられる。  Use for gastroenterological examinations such as mass screening and medical checkup. It may be possible to pursue the possibility of expanded use for pet screening.

この発明の一及び、二の実施形態を示す図である。It is a figure which shows one and two embodiment of this invention. この発明の三の実施形態を示す図である。It is a figure which shows three embodiment of this invention. 従来技術を示す図である。It is a figure which shows a prior art.

符号の説明Explanation of symbols

1 造影剤
2 非溶性マイクロカプセル
3 芯物質(硫酸バリウム、ヨウ化鉄またはヨウ化カリウムやヨウ化ナトリウム)
4 酸溶解性または油脂マイクロカプセル
5 芯物質(炭酸水素ナトリウム)
6 硫酸バリウム
1 Contrast agent 2 Insoluble microcapsule 3 Core material (barium sulfate, iron iodide, potassium iodide or sodium iodide)
4 Acid-soluble or oily microcapsules 5 Core material (sodium bicarbonate)
6 Barium sulfate

Claims (6)

硫酸バリウムを芯物質とした非溶性マイクロカプセルであることを特徴とする胃部検診用等バリウム造影剤。A barium contrast agent for gastric examination, which is an insoluble microcapsule having barium sulfate as a core substance. 前記造影剤の、硫酸バリウム以外の物質を芯物質とした非溶解性マイクロカプセルであることを特徴とする胃部検診用等バリウム造影剤。A barium contrast medium for gastric examination, which is a non-dissolvable microcapsule having a core substance other than barium sulfate as the contrast medium. 前記造影剤に、炭酸水素ナトリウムを芯物質とした酸溶解性マイクロカプセルを混合することを特徴とする胃部検診用等バリウム造影剤。A barium contrast agent for gastric examination, which is prepared by mixing acid-soluble microcapsules containing sodium hydrogen carbonate as a core substance in the contrast agent. 前記造影剤は、飲みやすく腸管内で固まらないことを特徴とする請求項1記載の造影剤。The contrast agent according to claim 1, wherein the contrast agent is easy to drink and does not solidify in the intestinal tract. 前記造影剤は、飲みやすく腸管内で固まらないことおよび、硫酸バリウムよりも胃腸に負担をかけにくいことを特徴とする請求項2記載の造影剤。The contrast agent according to claim 2, wherein the contrast agent is easy to drink and does not solidify in the intestinal tract, and is less burdensome to the gastrointestinal tract than barium sulfate. 前記造影剤は、事前に飲む発泡剤の効果を補助することを目的とすることを特徴とする請求項1または請求項2、及び請求項3記載の造影剤。The contrast medium according to claim 1, wherein the contrast medium is intended to assist an effect of a foaming agent to be drunk in advance.
JP2006335095A 2006-11-13 2006-11-13 Contrast agent for gastric region medical checkup Pending JP2008120780A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50140376A (en) * 1974-04-10 1975-11-11
JPH02191229A (en) * 1988-10-04 1990-07-27 Otsuka Pharmaceut Co Ltd Iron-containing formulation for nmr contrast medium
JPH03120212A (en) * 1989-10-02 1991-05-22 Otsuka Pharmaceut Co Ltd Effervescent preparation
JPH0924269A (en) * 1995-07-10 1997-01-28 M Technic Kk Method for producing microcapsules using phospholipids
JPH09511762A (en) * 1994-11-22 1997-11-25 ブラッコ リサーチ ソシエテ アノニム Microcapsule and method of manufacturing and using the same
JPH10500691A (en) * 1994-05-23 1998-01-20 イマアーレクス・フアーマシユーチカル・コーポレーシヨン Stable, homogeneous suspension as a contrast agent for computer-assisted tomography

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50140376A (en) * 1974-04-10 1975-11-11
JPH02191229A (en) * 1988-10-04 1990-07-27 Otsuka Pharmaceut Co Ltd Iron-containing formulation for nmr contrast medium
JPH03120212A (en) * 1989-10-02 1991-05-22 Otsuka Pharmaceut Co Ltd Effervescent preparation
JPH10500691A (en) * 1994-05-23 1998-01-20 イマアーレクス・フアーマシユーチカル・コーポレーシヨン Stable, homogeneous suspension as a contrast agent for computer-assisted tomography
JPH09511762A (en) * 1994-11-22 1997-11-25 ブラッコ リサーチ ソシエテ アノニム Microcapsule and method of manufacturing and using the same
JPH0924269A (en) * 1995-07-10 1997-01-28 M Technic Kk Method for producing microcapsules using phospholipids

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