JP2008120780A - Contrast agent for gastric region medical checkup - Google Patents
Contrast agent for gastric region medical checkup Download PDFInfo
- Publication number
- 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
- Authority
- JP
- Japan
- Prior art keywords
- contrast agent
- barium
- microcapsule
- barium sulfate
- agent
- 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
Landscapes
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
Abstract
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。
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.
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)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006335095A JP2008120780A (en) | 2006-11-13 | 2006-11-13 | Contrast agent for gastric region medical checkup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006335095A JP2008120780A (en) | 2006-11-13 | 2006-11-13 | Contrast agent for gastric region medical checkup |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2008120780A true JP2008120780A (en) | 2008-05-29 |
| JP2008120780A5 JP2008120780A5 (en) | 2008-11-06 |
Family
ID=39505919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006335095A Pending JP2008120780A (en) | 2006-11-13 | 2006-11-13 | Contrast agent for gastric region medical checkup |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2008120780A (en) |
Citations (6)
| 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 |
-
2006
- 2006-11-13 JP JP2006335095A patent/JP2008120780A/en active Pending
Patent Citations (6)
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1135624A (en) | Controlled release potassium dosage form | |
| WO2004017958A1 (en) | Soft capsule preparation | |
| Nanda Kishore et al. | Solid self microemulsification of Atorvastatin using hydrophilic carriers: a design | |
| CA2378468A1 (en) | Hydrodynamically balancing oral drug delivery system | |
| EP0683666A1 (en) | Water based beverages | |
| MXPA05008033A (en) | Multiparticulate compositions of milnacipran for oral administration. | |
| RU2014121255A (en) | ELECTROLYTE LIABILITIES | |
| JP2002538098A5 (en) | ||
| ES2149733T5 (en) | ORAL PHARMACEUTICAL COMPOSITION OF MODIFIED RELEASE CONTAINING 5-ASA AND METHOD FOR THE TREATMENT OF INTESTINAL DISEASES. | |
| Pandey et al. | A review on current approaches in gastro retentive drug delivery system | |
| Parikh et al. | In vitro and in vivo techniques to assess the performance of gastro-retentive drug delivery systems: a review | |
| CA2903283A1 (en) | Dual use oral pharmaceutical composition tablets of sulfate salts and methods of use thereof | |
| JP2008120780A (en) | Contrast agent for gastric region medical checkup | |
| Rani et al. | Recent advances in the development of floating microspheres for the treatment of gastric ulcers | |
| JP6483031B2 (en) | Capsule formulation | |
| Bhoyar et al. | An overview of a gastro retentive floating drug delivery system | |
| Patil et al. | Floating microspheres: A promising approach for gastric retention | |
| Ibrahim et al. | Physicochemical and pharmacodynamic evaluation of pioglitazone binary systems with hydrophilic carriers | |
| Pandit et al. | Formulation and in vitro evaluation of buoyant controlled release lercanidipine lipospheres | |
| Yadav et al. | In-vitro characterization of gastroretentive microballoons prepared by the emulsion solvent diffusion method | |
| JP4262057B2 (en) | Fat-soluble active ingredient combination food | |
| Rajput et al. | Floating drug delivery system-A review | |
| Bachhav | Gastroretentive drug delivery system: an overview | |
| Goo et al. | Optimization of a solidified micelle formulation for enhanced oral bioavailability of atorvastatin calcium using statistical experimental design | |
| Dey et al. | Floating drug delivery system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080822 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080822 |
|
| A871 | Explanation of circumstances concerning accelerated examination |
Free format text: JAPANESE INTERMEDIATE CODE: A871 Effective date: 20080822 |
|
| RD03 | Notification of appointment of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7423 Effective date: 20080822 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20080822 |
|
| A975 | Report on accelerated examination |
Free format text: JAPANESE INTERMEDIATE CODE: A971005 Effective date: 20081023 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20081118 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20081210 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20090324 |
|
| RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20091130 |
|
| A072 | Dismissal of procedure |
Free format text: JAPANESE INTERMEDIATE CODE: A072 Effective date: 20100525 |