WO2010144024A1 - X-ray detectable plaster or dressing - Google Patents
X-ray detectable plaster or dressing Download PDFInfo
- Publication number
- WO2010144024A1 WO2010144024A1 PCT/SE2010/050577 SE2010050577W WO2010144024A1 WO 2010144024 A1 WO2010144024 A1 WO 2010144024A1 SE 2010050577 W SE2010050577 W SE 2010050577W WO 2010144024 A1 WO2010144024 A1 WO 2010144024A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plaster
- dressing
- ray detectable
- volume
- tantalum
- Prior art date
Links
- 239000011505 plaster Substances 0.000 title claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 34
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 12
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 12
- 239000010937 tungsten Substances 0.000 claims abstract description 12
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 235000013305 food Nutrition 0.000 description 15
- 208000027418 Wounds and injury Diseases 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008821 health effect Effects 0.000 description 1
- 238000012994 industrial processing Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/54—Radio-opaque materials
-
- A61F13/01034—
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/02—Adhesive plasters or dressings
- A61F13/0203—Adhesive plasters or dressings having a fluid handling member
- A61F13/0226—Adhesive plasters or dressings having a fluid handling member characterised by the support layer
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/44—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with radio-opaque material or signalling means for residual material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/18—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
Definitions
- the present invention relates to a wound plaster or dressing that can be detected by X-rays
- plasters that can be detected automatically.
- the person involved may drop the plaster into the food products that are being prepared. It is, of course, vital that such food products do not reach a consumer, who would in this case discover a plaster in the food. It is also of the highest importance that infection is not spread with the food products due to someone having dropped a plaster into food products that are being prepared.
- an X-ray machine is arranged along, for example, a transport belt for food prod- ucts.
- the X-ray machine is of continuous type, i.e. it emits X-rays of either continuous or pulsating type.
- a plaster that can be detected by X-rays has been revealed in European patent number 0768855.
- the plaster has been loaded for this purpose with the material tungsten.
- Tungsten is a very hard material, and it is therefore difficult to fashion it to a form that is suitable to be used in a plaster.
- tungsten has been shown to have certain health effects such as irritation of the skin on contact. It is recommended that protective equipment be used when handling tungsten in industrial processing. It is therefore a desire to avoid the use of tungsten.
- the present invention solves this problem.
- the present invention thus relates to an X-ray detectable plaster or dressing and is characterised in that the plaster or dressing comprises a material with at least 80% by weight tantalum, in that the material comprises up to, but lower than 10% by weight tungsten, and in that the material has a volume of at least approximately 0.1 mm 3 .
- FIG. 2 shows a side view of a plaster.
- the present invention is described below with reference to a plaster, but the invention is not limited to plasters in the general sense of the term, but can be used in the same way for other dressings such as, for example, compresses, surgical tape, etc.
- Figure 1 shows an X-ray detectable plaster 1, comprising a support 2 provided with an adhesive and a wound pad 3.
- the plaster itself is a conventional plaster.
- the plaster 1 comprises a material with at least 80% by weight tantalum, with a volume of at least 0.1 mm 3 . Furthermore, the material comprises tungsten up to, but lower than 10% by weight. The remaining material, which may be up to 10% by weight, is a material that is suitable for the present applications, and it may be chosen by one skilled in the art.
- the plaster 1 comprises a material with at least 90% by weight tantalum and up to, but lower than 10% by weight tungsten, where the material has a volume of at least 0.125 mm 3 .
- the X-ray detectable material in the drawings is a thread 4.
- tantalum has a much lower density than tungsten.
- the ductility of tantalum is relatively high, and it is therefore easy to process to form a foil or thread.
- tantalum does not give rise to any negative effects on humans.
- tantalum is spontaneously covered by a protective layer of oxide, which leads to a very high resistance of tantalum to, among other agents, acids, most salt solutions and organic chemicals, and this is a positive property with respect to the production of foods.
- the said material may have any suitable form, but according to a first preferred embodiment the said material has the form of a foil with a minimum length of about 5 mm, a minimum width of about 1 mm and a minimum thickness of about 25 micrometres . According to a second preferred embodiment, the said material is in the form of a thread with a diameter of at least about 30 micrometres and a length that gives a volume of at least about 0.1 mm 3 .
- Tantalum metal can be obtained both as foil and as thread.
- a plaster 1 comprising a support provided with an adhesive and a wound pad 3
- the said material independently of its form, be placed between the support and the wound pad, or alternatively in the support, or in the wound pad.
- the said material be located within the compress .
- the said material is in the form of a powder.
- the powder may in this case be applied to the said support by adhesive.
Abstract
The present invention relates to a plaster or dressing that can be detected by X-rays. The invention is characterised in that the plaster (1) or dressing comprises a material with at least 80% by weight tantalum, in that the material comprises up to, but lower than 10% by weight tungsten, and in that the material has a volume of at least approximately 0.1 mm3.
Description
X-ray detectable plaster or dressing.
The present invention relates to a wound plaster or dressing that can be detected by X-rays
It is important that those who process and produce food prod- ucts in the food processing industry, and other industries, use plasters that can be detected automatically. When those who work with food products experience an injury and use a plaster, the person involved may drop the plaster into the food products that are being prepared. It is, of course, vital that such food products do not reach a consumer, who would in this case discover a plaster in the food. It is also of the highest importance that infection is not spread with the food products due to someone having dropped a plaster into food products that are being prepared.
The food processing industry for this reason uses plasters that can be detected automatically. One such known automatic method is X-ray detection. In this case, an X-ray machine is arranged along, for example, a transport belt for food prod- ucts. The X-ray machine is of continuous type, i.e. it emits X-rays of either continuous or pulsating type.
A plaster that can be detected by X-rays has been revealed in European patent number 0768855. The plaster has been loaded for this purpose with the material tungsten. Tungsten is a very hard material, and it is therefore difficult to fashion it to a form that is suitable to be used in a plaster.
Furthermore, tungsten has been shown to have certain health effects such as irritation of the skin on contact. It is recommended that protective equipment be used when handling tungsten in industrial processing.
It is therefore a desire to avoid the use of tungsten.
The present invention solves this problem.
The present invention thus relates to an X-ray detectable plaster or dressing and is characterised in that the plaster or dressing comprises a material with at least 80% by weight tantalum, in that the material comprises up to, but lower than 10% by weight tungsten, and in that the material has a volume of at least approximately 0.1 mm3.
The invention is described in more detail below, partly in association with an embodiment shown in the attached drawings, where: - Figure 1 shows a plan view of a plaster, and
- Figure 2 shows a side view of a plaster.
The present invention is described below with reference to a plaster, but the invention is not limited to plasters in the general sense of the term, but can be used in the same way for other dressings such as, for example, compresses, surgical tape, etc.
Figure 1 shows an X-ray detectable plaster 1, comprising a support 2 provided with an adhesive and a wound pad 3. The plaster itself is a conventional plaster.
According to the invention, the plaster 1 comprises a material with at least 80% by weight tantalum, with a volume of at least 0.1 mm3. Furthermore, the material comprises tungsten up to, but lower than 10% by weight.
The remaining material, which may be up to 10% by weight, is a material that is suitable for the present applications, and it may be chosen by one skilled in the art.
According to one preferred embodiment of the invention, the plaster 1 comprises a material with at least 90% by weight tantalum and up to, but lower than 10% by weight tungsten, where the material has a volume of at least 0.125 mm3.
The X-ray detectable material in the drawings is a thread 4.
It has surprisingly proved to be the case that a relatively small volume of tantalum is sufficient to carry out a sufficiently reliable detection by means of X-rays during the production of foods, where the food is transported past X-ray equipment despite the fact that tantalum has a much lower density than tungsten.
The ductility of tantalum is relatively high, and it is therefore easy to process to form a foil or thread.
Furthermore, tantalum does not give rise to any negative effects on humans. In addition, tantalum is spontaneously covered by a protective layer of oxide, which leads to a very high resistance of tantalum to, among other agents, acids, most salt solutions and organic chemicals, and this is a positive property with respect to the production of foods.
The said material may have any suitable form, but according to a first preferred embodiment the said material has the form of a foil with a minimum length of about 5 mm, a minimum width of about 1 mm and a minimum thickness of about 25 micrometres .
According to a second preferred embodiment, the said material is in the form of a thread with a diameter of at least about 30 micrometres and a length that gives a volume of at least about 0.1 mm3.
The reason that the dimensions are specified as approximate values is that the dimensions in themselves are not critical, but it is the volume that is critical in giving satisfactory sensitivity of the detection.
Tantalum metal can be obtained both as foil and as thread.
In the case of a plaster 1 comprising a support provided with an adhesive and a wound pad 3, it is preferred that the said material, independently of its form, be placed between the support and the wound pad, or alternatively in the support, or in the wound pad.
In the case of a dressing in the form of a compress, it is preferred that the said material be located within the compress .
It may also be preferred that the said material is in the form of a powder. The powder may in this case be applied to the said support by adhesive.
Experiments have been carried out at a food producer in normal operating conditions. It is obvious that the more of the said material that is present in the plaster, the stronger will be the signal that is obtained, i.e. the higher will be the attenuation of X-rays that is obtained, and this leads to the plaster being more easily detected.
Results from three typical experiments are given below.
Material Total volume Detectable signal 1 mm x 24 mm x 25 μm 0.6 mm3 strong signal
1 mm x 5 mm x 25 μm 0.125 mm3 good signal
1 mm x 1 mm x 25 μm 0.025 mm3 no signal
A number of embodiments have been described above. The design of the plaster, however, may be different, as may also the form of the said material.
Furthermore, the invention has been described in connection with the production of food. The present invention, however, is not limited to any particular application, but can, of course, be used wherever it is suitable and it is necessary to detect plasters.
The present invention, therefore, is not to be considered to be limited to the embodiments specified above, but can be varied within the scope specified by the attached patent claims .
Claims
1. An X-ray detectable plaster or dressing, characterised in that the plaster (1) or dressing comprises a material with at least 80% by weight tantalum, in that the material comprises up to, but lower than 10% by weight tungsten, and in that the material has a volume of at least approximately 0.1 mm3.
2. An X-ray detectable plaster or dressing according to claim 1, characterised in that the plaster (1) or dressing comprises a material with at least 90% by weight tantalum, in that the material comprises up to, but lower than 10% by weight tungsten, and in that the material has a volume of at least approximately 0.125 mm3.
3. An X-ray detectable plaster or dressing according to claim 1 or 2, characterised in that the said material is in the form of a foil with a minimum length of about 5 mm, a minimum width of about 1 mm and a minimum thickness of about 25 micrometres.
4. An X-ray detectable plaster or dressing according to claim 1 or 2, characterised in that the said material is in the form of a thread (4) with a diameter of at least about 30 micrometres and a length that gives a volume of at least about 0.1 mm3.
5. An X-ray detectable plaster or dressing according to claim 1, 2, 3 or 4, where the plaster (1) comprises a support (2) provided with an adhesive and a wound pad (3), characterised in that the said material is located between the support (2) and the wound pad (3), or alternatively in the support or in the wound pad.
6. An X-ray detectable plaster or dressing according to claim 1, 2 or 5, characterised in that the said material is in the form of a powder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0950438-2 | 2009-06-10 | ||
| SE0950438 | 2009-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010144024A1 true WO2010144024A1 (en) | 2010-12-16 |
Family
ID=43309087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE2010/050577 WO2010144024A1 (en) | 2009-06-10 | 2010-05-28 | X-ray detectable plaster or dressing |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2010144024A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012161416A (en) * | 2011-02-04 | 2012-08-30 | Kawamoto Sangyo Kk | X-ray contrast thread, and gauze with x-ray contrast thread |
| CN103517692A (en) * | 2011-07-04 | 2014-01-15 | 皮亚克株式会社 | X-ray detectable adhesive bandage and method of manufacturing x-ray detectable adhesive bandage |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3911922A (en) * | 1974-06-11 | 1975-10-14 | Herbert L Kliger | Surgical sponge |
| WO1996001096A2 (en) * | 1994-07-04 | 1996-01-18 | Smith & Nephew Plc | Dressing |
| GB2308308A (en) * | 1995-12-20 | 1997-06-25 | Smith & Nephew | Metal detectable wound dressing |
| EP1069395A1 (en) * | 1999-07-14 | 2001-01-17 | Nitto Denko Corporation | Pressure-sensitive adhesive sheet for radiography |
| WO2002005863A1 (en) * | 2000-07-14 | 2002-01-24 | Advanced Cardiovascular Systems, Inc. | Radiopaque stent composed of a binary alloy |
| US20030176828A1 (en) * | 2002-02-04 | 2003-09-18 | Damage Control Surgical Technologies, Inc. | Method and apparatus for improved hemostasis and damage control operations |
| US20070276488A1 (en) * | 2003-02-10 | 2007-11-29 | Jurgen Wachter | Medical implant or device |
-
2010
- 2010-05-28 WO PCT/SE2010/050577 patent/WO2010144024A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3911922A (en) * | 1974-06-11 | 1975-10-14 | Herbert L Kliger | Surgical sponge |
| WO1996001096A2 (en) * | 1994-07-04 | 1996-01-18 | Smith & Nephew Plc | Dressing |
| GB2308308A (en) * | 1995-12-20 | 1997-06-25 | Smith & Nephew | Metal detectable wound dressing |
| EP1069395A1 (en) * | 1999-07-14 | 2001-01-17 | Nitto Denko Corporation | Pressure-sensitive adhesive sheet for radiography |
| WO2002005863A1 (en) * | 2000-07-14 | 2002-01-24 | Advanced Cardiovascular Systems, Inc. | Radiopaque stent composed of a binary alloy |
| US20030176828A1 (en) * | 2002-02-04 | 2003-09-18 | Damage Control Surgical Technologies, Inc. | Method and apparatus for improved hemostasis and damage control operations |
| US20070276488A1 (en) * | 2003-02-10 | 2007-11-29 | Jurgen Wachter | Medical implant or device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012161416A (en) * | 2011-02-04 | 2012-08-30 | Kawamoto Sangyo Kk | X-ray contrast thread, and gauze with x-ray contrast thread |
| CN103517692A (en) * | 2011-07-04 | 2014-01-15 | 皮亚克株式会社 | X-ray detectable adhesive bandage and method of manufacturing x-ray detectable adhesive bandage |
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