WO1992005759A1 - Device for administering a physiologically active substance to the gastro-intestinal tract - Google Patents
Device for administering a physiologically active substance to the gastro-intestinal tract Download PDFInfo
- Publication number
- WO1992005759A1 WO1992005759A1 PCT/SE1991/000651 SE9100651W WO9205759A1 WO 1992005759 A1 WO1992005759 A1 WO 1992005759A1 SE 9100651 W SE9100651 W SE 9100651W WO 9205759 A1 WO9205759 A1 WO 9205759A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- capsule
- wire
- line
- gastro
- substance
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M31/00—Devices for introducing or retaining media, e.g. remedies, in cavities of the body
Definitions
- This invention relates to a device for introducing a physio ogically active or diagnostic substance to the gastro-inte tinal tract of a human subject in predetermined locations the tract.
- the device comprises a capsule containing sa substance, the capsule being intended to be swallowed by t subject.
- a physiologi cally active substance may in some cases be desirable to administer a physiologi cally active substance to a specific part of, or location in the gastro-intestinal tract.
- One reason for this might fo instance be a local treatment of a local inflammation of th bowel, another the administering of a substance to th intestine in conjunction with a subsequent blood test fo testing the local permeability of the intestine. This would b especially important if it should prove to be desirable t minimize the systemic effects.
- a device for accomplishing such a local administering of drug or substance to the gastro-intestinal tract is disclose in DE-A-29 28 477.
- This prior art device discloses a capsul containing a substance which can be swallowed by the patien and which can be caused to open at a specific location in th gastro-intestinal tract.
- the trigger mechanism for opening th capsule may comprise a first wire which may be heated by mean of a high-frequency field applied from outside the patient
- the first wire is connected to a second wire made of plastic which melts when said first wire is heated.
- the second wire i connected to a spring which is released when said second wir melts.
- the compressive force of the spring is utilized to ope the capsule, thus releasing the substance.
- this prior art device suffers from some drawbacks
- One drawback is that the capsule may have to be tracked b means of ultrasound or X-rays until the desired location i reached each time this location is to be treated.
- Anothe drawback is that the capsule will not remain in the vicinit of the location to be treated when the substance is bein released since the capsule will continue to move along th gastro-intestinal tract in the normal manner together with th released substance.
- this prior art device, i used for treatment mainly would be suitable when fe treatments, each having a comparatively short duration, are t be performed.
- the present invention aims to create a device of the ki described in the introductory clause of the attached ma claim which also easily can be used for repeated loc treatments of the gastro-intestinal tract which each may performed during a comparatively long period of time, th allowing the substance to act as long as necessary upon t desired location or part of the intestine.
- said capsule is connected to a li or wire which is to be swallowed by the patient together wi the capsule apart from one end thereof which is to be kept a held outside the patient, by which means the capsule can stopped and held at said predetermined locations.
- the capsu is then held at the location as long as is necessary conclude the treatment.
- the wire then may be cut and wire a capsule then will leave the patient's body through the anus.
- the capsule is closed initially a is provided with means for opening the capsule at sa predetermined location(s) when triggered by a signal tran mitted though said wire which preferably is electrical conductive.
- the capsule is made of a relative ly stiff plastics material or metal.
- the material in t capsule preferably should be opaque to X-rays, at least t some extent.
- the capsule has the general shape of a typica oblong pharmaceutical gelatine capsule comprising two halves one being inserted into the other, the halves thus overlappin each other to a certain extent.
- a size suitable for swallowin has been found to be a length of 2 - 3 cm and a diameter o about 1 cm corresponding to a volume of about 2 ml.
- a number of holes are arranged equiangularly around th periphery of each half in their overlapping parts. Th distances between the holes is greater than the diameter o the holes, which means that the holes will be closed in on rotational position of the halves.
- the holes can be made t register or match when one half is rotated relative to th other, thus opening the capsule and exposing its contents.
- Th capsule further contains a spring which can be pretensioned t effect said relative rotation of the halves when triggered The spring can be triggered by any kind of a conventiona triggering mechanism which is responsive to an electrica signal and which can be miniatyrized.
- a thin, very flexible line or wire is attached to one end o the capsule.
- the line is sufficiently thin, flexible an smooth not to cause nausea when swallowed.
- the line furthe is made of an electrically conductive material and shoul preferably at least partly be made of a material which i opaque to X-rays.
- the line may be a thin wire of e.g. copper silver or stainless steel, preferably coated with teflon an may if necessary have two leads for the signal. This secon lead may for instance be necessary for the sake of safety i the triggering device is of a kind requiring a relative high voltage to react.
- the outside of the line may be provid with scale marks for each centimeter.
- the capsule In use the capsule is swallowed together with a certain amou of the wire, for instance a sufficient amount to allow t capsule to pass the pylorus.
- the normal peristaltic movemen of the intestine then will move the capsule along the inte tinal tract together with the wire.
- the wire When the location to treated is reached, the wire is anchored iside or outside t patient, for instance in a tooth of the patient, which mea that the capsule will be stopped at this location. If there no great need for precision, this location may be determin by determining the length of wire the patient has swallowed means of the scale marks on the wire, otherwise an X-r device may have to be used in order to exactly place t capsule at the desired location.
- Once the capsule has be placed exactly it is sufficient to note the location of scale mark in relation to some part of the patient's body, e the lips, in order to allow the placing of the capsule to repeated exactly if the treatment is to be repeated on t same patient.
- an electrical signal is sent to the capsule by way of t wire triggering the pretensioned spring which in turn wi rotate one of the two halves of the capsule relative to t other and expose the contents of the capsule to the interi of the intestine. If the capsule contains a contrast medium mixed with the substance in the capsule, it easily can checked if the substance is released correctly by means X-rays.
- the wire is simply cut and the capsule will exit the natu way through the anus together with the wire.
- the treatment can be repeat by the patient as often as necessary without any need fo X-ray equipment, thus minimizing the exposure to X-rays. possible harmful influence from the triggering signal may b avoided since the signal can be sent through the insulate wire.
- the line could for instanc comprise optical fibers, thus allowing an optical signal to b sent through the line instead of the electrical signal.
- the capsul comprises two halves and is opened by means of a rotatio between the two halves, but the capsule of course can open i any other suitable way.
- the capsule could for instanc comprise two halves slideable longitudinally relative to eac other under the influence of the spring or include a ca lifted by means of a lever system.
- the capsule also can be made to open automatically indepen dently of any signal from the exterior of the patient.
- One wa of doing this may be to provide the capsule with a time-sett ing device which provides the signal for opening the capsul after a period of time which is sufficient to guarantee tha the capsule has reached the location to be treated.
- Anothe way may be to make parts of the shell of the capsule of material, e g gelatine, which dissolves in the gastro-intes tinal tract. The time elapsing until the capsule opens i dependent on the thickness and/or the material of these part of the shell, these factors being chosen such that the capsu has ample time to reach the location to be treated befo dissolving entirely and releasing the substance.
- the part the capsule to which the line is attached should howev preferably not be dissolvable since this part would facilita the movements of the line through the gastro-intestinal tra when the treatment has been concluded.
- the shell of t capsule could also be made of a material which dissolves at certain pH.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3516006A JPH06501401A (en) | 1990-09-28 | 1991-09-27 | Device for administering bioactive substances to the gastrointestinal tract |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9003096A SE9003096D0 (en) | 1990-09-28 | 1990-09-28 | DEVICE FOR ADMINISTRATING A PHYSIOLOGICALLY ACTIVE SUBSTANCE TO THE GASTRO-INTESTINAL TRACT |
SE9003096-6 | 1990-09-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992005759A1 true WO1992005759A1 (en) | 1992-04-16 |
Family
ID=20380488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1991/000651 WO1992005759A1 (en) | 1990-09-28 | 1991-09-27 | Device for administering a physiologically active substance to the gastro-intestinal tract |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0550622A1 (en) |
JP (1) | JPH06501401A (en) |
AU (1) | AU8640491A (en) |
SE (1) | SE9003096D0 (en) |
WO (1) | WO1992005759A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996025085A1 (en) * | 1995-02-13 | 1996-08-22 | Lindstroem Kjell | Method and device for administering or aspirating substances along the whole gastrointestinal tract |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2928477B2 (en) * | 1979-07-14 | 1981-06-04 | Battelle-Institut E.V., 6000 Frankfurt | Device for the release of substances at defined locations in the digestive tract |
EP0079724A2 (en) * | 1981-11-09 | 1983-05-25 | Eli Lilly And Company | Sustained release capsule for ruminant animals |
-
1990
- 1990-09-28 SE SE9003096A patent/SE9003096D0/en unknown
-
1991
- 1991-09-27 EP EP19910917722 patent/EP0550622A1/en not_active Withdrawn
- 1991-09-27 AU AU86404/91A patent/AU8640491A/en not_active Abandoned
- 1991-09-27 JP JP3516006A patent/JPH06501401A/en active Pending
- 1991-09-27 WO PCT/SE1991/000651 patent/WO1992005759A1/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2928477B2 (en) * | 1979-07-14 | 1981-06-04 | Battelle-Institut E.V., 6000 Frankfurt | Device for the release of substances at defined locations in the digestive tract |
EP0079724A2 (en) * | 1981-11-09 | 1983-05-25 | Eli Lilly And Company | Sustained release capsule for ruminant animals |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996025085A1 (en) * | 1995-02-13 | 1996-08-22 | Lindstroem Kjell | Method and device for administering or aspirating substances along the whole gastrointestinal tract |
US5879325A (en) * | 1995-02-13 | 1999-03-09 | Kjell Olof Torgny Lindstrom | Method and device for administering or aspirating substances along the whole gastrointestinal tract |
Also Published As
Publication number | Publication date |
---|---|
JPH06501401A (en) | 1994-02-17 |
AU8640491A (en) | 1992-04-28 |
EP0550622A1 (en) | 1993-07-14 |
SE9003096D0 (en) | 1990-09-28 |
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