RADIATION SHIELD DEVICE
20230138584 · 2023-05-04
Assignee
Inventors
Cpc classification
International classification
Abstract
The present disclosure relates to a radiation shield device comprising a sheet of material comprising a plurality of flaps, wherein the sheet comprises a barrier to ionizing radiation. The present disclosure also relates to a method for manufacturing said radiation shield device.
Claims
1. A radiation shield device comprising a sheet of material comprising a plurality of flaps, wherein the sheet comprises a barrier to ionizing radiation.
2. The device according to claim 1, wherein the sheet comprises one or more pre-formed lines about which the flaps can be folded.
3. The device according to claim 2, wherein the rigidity of the sheet material is greater than the rigidity of the pre-formed lines.
4. The device according to claim 2, wherein the rigidity of the pre-formed lines is greater than the rigidity of the sheet material.
5. The device according to claim 2, wherein the one or more pre-formed lines comprise a spine.
6. The device according to claim 5, wherein the spine is made of a bendable material.
7. The device according to claim 1, wherein the flaps are separated from adjacent sheet material and/or flap(s) along a separation line.
8. The device according to claim 7, wherein the device further comprises means for covering the separation lines.
9. The device according to claim 1, wherein the barrier to ionizing radiation comprises one or more heavy metals.
10. The device according to claim 1, wherein the device comprises one or more antimicrobial layers, antibacterial agents, antifungal agents, antiyeast agents and/or antiviral agents, or combinations thereof.
11. The device according to claim 1, wherein the device further comprises means for detecting ionizing radiation.
12. The device according to claim 11, wherein the device comprises a compound or component capable of emitting light upon exposure to ionizing radiation.
13. A method for the manufacture of a radiation shield device according to claim 1, comprising the steps of: providing a sheet of material comprising a barrier to ionizing radiation; and cutting the sheet along one or more separation lines to form flaps.
14. The method according to claim 13, further comprising the step of forming folding lines in the sheet.
15. The method according to claim 13, further comprising the step of forming covers over the separation lines.
Description
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0034] The disclosure will be further described with reference to the drawings and figures, in which:
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DETAILED DESCRIPTION
[0049] With reference to
[0050] The barrier absorbs and/or blocks ionizing radiation, such as x-rays or gamma rays, used in treatment, diagnosis, prognosis and imaging processes. However, the present disclosure may be used in technological fields, other than the medical, dental and veterinary fields, wherein ionizing radiations are used or encountered.
[0051] The barrier may comprise one or more radiation blocking and/or absorbing agents. Preferred agents include heavy metals, such as lead, and other compounds and composite materials which are used in radiation PPE. The composite may be a heavy metal-containing composite or may be free of heavy metal, and instead may include one or more of tin, antimony, tungsten, bismuth or other radiation absorbing or blocking elements.
[0052] The sheet 2 may have a monolayer structure, wherein the layer comprises the barrier to ionizing radiation. It may have a multilayer structure, wherein, in addition to the one or more radiation barrier layers, it includes other functional or aesthetic layers. The optional layers include structural layers, weighing layers, protective layers, surface layers such as cleanable layers, anti-slip or friction layers, antimicrobial layers, antibacterial layers, antifungal layers, antiyeast layers, antiviral layers, mesh, fabric or textile layers, impermeable layers, and the like. Where the device must be positioned on the patient according to a set direction, the device may comprise colored layers. For example, where the device comprises a leak detection layer, the color of the surface facing the patient is preferably different from the color of the surface facing the health professional. The layers in a multilayer structure may be joined to each other by means of adhesive, co-extrusion, lamination, coating, mechanical attachment (such as sewing), and the like.
[0053] The device 1 may be free of lead, so as to be easily disposed of and/or recyclable. The device 1 may be a single use device, or be sterilizable for repeated use.
[0054] The shield device 1 is preferably substantially flexible so that it can rest on the body of the patient, substantially following his or her contours. Increasing the rigidity of the sheet (for example to form a plate) could facilitate the folding and unfolding of the flaps 3a, 3b, 3c, however, this would to be to the detriment of maneuverability for the health professional, and comfort for the patient.
[0055] The device 1 may comprise one or more fluid-absorbent layers (such as a surgical drape material). In the case of a monolayer device, the device 1 is comprises one fluid-absorbent layer. In the case of a multiplayer device, the device 1 comprises one or more outer fluid-absorbent layers.
[0056] The device 1 may have friction properties to minimize or prevent movement of the device on 1 the patient (i.e., on the surface of the device facing, in use, the patient). The device 1 may comprise of be made of a friction material, and/or one or more friction components (such as rubber streaks, bands and the like). Alternatively or additionally, the device 1 may comprise an adhesive layer and/or adhesive components.
[0057] For example, the device 1 may have an absorbent surface facing, in use, the medical practitioner, and an anti-slip surface facing, in use, the patient.
[0058] The device 1 comprises a plurality of flaps 3a, 3b, 3c. Preferably, the sheet 1 and the flaps 3a, 3b, 3c, are made of the same material and/or have the same structure. Although it is envisaged, within the scope of the present disclosure, that they may be made of different materials and/or have different structures.
[0059] In the embodiment illustrated in
[0060] The flaps 3a, 3b, 3c extend from the sheet 2 and lie, in the shield configuration, in the plane of the sheet 2. The sheet 2 itself may form or may be used as a flap.
[0061] A flap may be separated from an adjacent sheet and/or flap along one or more separation lines 4. The device may be provided with pre-detached separations lines 4. Additionally, or alternatively, the device may be provided with separation lines 4 which may allow the user to detach the flaps from adjacent flaps and/or sheets, prior use. The flap may be partially or completely detachable from the device.
[0062] A flap may be connected to an adjacent sheet and/or flap by one or more folding lines 5.
[0063] A folding line 5 is a line about which the sheet and/or flap can be folded.
[0064] A folding line 5 may form one or more folding areas 6 between two or more folding lines (
[0065] The folding area 6 may or may not be bordered by folding lines 5. In the latter case, the folding area 6 may be an area of different rigidity than that of the sheet 2 and/or flaps 3a, 3b, 3c. The folding area 6 may for example have a different thickness than the sheet and/or flaps, be made of a different material, and/or comprise one or more layers.
[0066] The device 1 may comprise one or more spines or battens 7. As illustrated in
[0067] The one or more spines or battens 7 may be positioned across a sheet 2 or a flap 3a, 3b, 3c (i.e., transversally; e.g., by extending from on edge of the sheet or flap to an opposing or adjacent edge of the sheet or flap). Additionally or alternatively the one or more spines or battens 7 may be positioned at any one or more edges of the sheet 2 or flap(s) 3a, 3b, 3c.
[0068] In an embodiment, the device 1 is provided with a plurality of pockets 8, and removable spines 7, which may be inserted into one or more pockets 8, prior use and depending the intended use or procedure.
[0069] The device 1 may comprise a peripheral hem 9 partially or completely along the periphery of the device 1, sheet 2 and/or flaps 3a, 3b, 3c (see
[0070] The folding lines 5, folding areas 6, spines 7 and/or hem 9 described herein may be bendable or shapable. This enables the health professional to shape the device 1 to follow the anatomy of the patient, to facilitate access to specific target areas, to increase the protection efficiency of the device 1.
[0071] The device 1 comprises one or more separation lines 4 separating adjacent flap(s) and/or sheet(s). A separation line 4 may be protected by a cover 10, as illustrated in
[0072] When placed over the patient, the outer flaps (e.g., 3a and 3c) have a tendency to slide outwardly towards the sides of the patient, thereby leaving gaps at the separation lines 4 between the flaps 3a, 3b, 3c, through which radiation can leak. The spines 7, and more generally the folding lines 5, and/or the hem 9 may act as battens to impart stability to the device 1, and to prevent the flaps 3a, 3c to slide outwardly. Other solutions are proposed to prevent the device 1 from shifting from its intended position, and the device 1 may be provided with means for improving the stability of the device. For example, the device 1 (or bag 11) may be provided with an anti-slip and/or friction surface, said surface facing, in use, the patient. For example, the device 1 (or bag 11) may be provided with attachment means, to attach the device 1 (or bag 11) to the patient's gown. For example, spines 7 and/or hem 9 may be bendable or shapable so as to be bent or shaped to be secured to the patient. For example, the spines 7 and/or hem 9 may be made of a material which is heavier than the material of the sheet 1 and/or flaps, so as a weigh the device 1 down onto the patient. For example, the device 1, as a whole, may be thick or heavy enough to weigh down onto the patient. For example, the spines or battens 7 may comprise or consist of a magnetic material or element, to prevent two adjacent spines or battens 7 from accidentally pulling apart from each other.
[0073] A preferred embodiment is described below with respect to
[0074] The device 1 comprises a sheet 2 and three flaps 3a, 3b, 3c. The flaps 3a, 3b, 3c are separated from each other by a separation line 4 (i.e., a slit or cut line).
[0075] The device 1 comprises a plurality of battens 7. In this embodiment, each batten 7 comprises or consists an elongated substantially flat member, which preferably comprises a polymeric material. For example, each batten 7 are made of a 2 mm wide styrene acrylonitrile polymer. The batten 7 are secured to the device 1, preferably to the surface of the device 1. For example, the battens 7 comprise a layer of adhesive, such as a self-adhesive carbon fiber film. Battens 7a are positioned on or adjacent the folding line between the sheet 2 and a fold 3a, 3b, 3c. In particular, the batten 7a creates a folding line about which a flap 3a, 3b, 3c may be folded about, for example to rest upon the sheet 2. In a similar manner, battens 7b are positioned transversally across the flap(s) 3a, 3b, 3c to create multiple folding lines about which the flaps can be folded, for example upon itself. The dimensions of the device 1 are preferably 40 cm to 120 cm long and 40 cm to 120 cm wide, and more preferably 60 cm to 80 cm long and 60 cm to 80 cm wide. Most preferred dimensions are 58 cm long and 60 cm wide. The flaps may have the same dimensions as each other, or different dimensions.
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[0077] As illustrated in
[0078] Other sheets are available with a single “fixed” opening, so that the sheet must be moved on the patient every time a different area of the patient must be accessed. Depending on the position of the sheet on the patient, the sheet will leave large areas of the patient uncovered, thereby exposing the medical practitioner to radiation. Alternatively, the radiation source must be switched off every time the sheet is moved so as to limit exposure to radiation. This is not possible in emergency procedures. Often, these openings do not comprise any sort of cover so that the practitioner is unnecessarily exposed to radiation passing through said opening.
[0079] The present disclosure is advantageous in that only the area to be visualized can be selectively uncovered and all other areas can remain shielded, thereby offering a wide range of possible placements and access/visualization points.
[0080] The flaps 3a, 3b, 3c can be completely or partially lifted depending on the extent of access required. Therefore, the dimensions of the opening can be varied. The battens 7 allows for controlled flexing, and reduces damage to the device 1 and to the integrity of the material. Thus, ruptures and tears are less likely to form so that the device 1 is efficient after repeated uses. The battens 7 provides some rigidity to the device 1, but more importantly it provides stability, so that the device 1 stays in place on the patient during the procedure. The device 1 need not be secured to the patient or to the operating table.
[0081] The flaps 3a, 3b, 3c are preferably made of the same material as the sheet 2. The flaps 3a, 3b, 3c and the sheet 2 are preferably integrally formed. For example, the flaps 3a, 3b, 3c are formed by cutting slits along the separation lines 4. The flaps 3a, 3b, 3c may be sewn or otherwise attached to the sheet 2, provided that they can still perform the function of covering or uncovering an area of the patient (i.e., an opening).
[0082] The device 1 may comprise means for detecting, monitoring and/or measuring radiation levels. The sheet 1 may comprise one or more radio-sensitive agents. The agent may be capable of reacting to an emitted radiation, for example, by changing color upon exposure to a specific radiation and/or at a predetermined level. In an embodiment, the device 1 comprises a layer of material capable of reacting to radiation exposure for example by emitting light or changing color. The layer is positioned, in use, on the surface of the device facing away from the patient, i.e., facing the health professional. This device 1 is particularly useful to detect any default, damage, breach and/or crack in the shield, which would leak radiation. In practice, the radiation is emitted from below the patient, travelled through the patient, and is absorbed or blocked by the shield. In the shield is damaged, radiation would reach the reactive material in the outer layer, thereby signaling a radiation leak to the user. The reaction level may be quantifiable so that the level of radiation can be determined. The device 1 may comprise a separate component capable of detecting, monitoring and/or measuring radiation levels, for example, a radiation dosimeter.
[0083] The pattern of the separating lines 4 and the folding lines 5 can be varied depending on the intended use or procedure and the location and size of the target area. The overall shape and dimensions of the device 1 can be varied depending on the intended use or procedure, on the size and shape of the patient or of the target area.
[0084] The flaps 3a, 3b, 3c provide protection when lying on the patient, and access when the patient is uncovered. The separation lines 4, i.e., the slit between two flaps 3a, 3b, 3c or between a sheet 2 and a flap 3a, 3b, 3c, themselves may be used to access target areas. The flaps may be separated so as to allow access through the slit, whilst still protecting the health professional from harmful radiation. Thus, the present shield device 1 may be defined as a device 1 comprising a sheet of radiation blocking/absorbing material comprising a plurality of flaps 3a, 3b, 3c to protect the health professional; and it could also be defined as a device 1 comprising a sheet of radiation blocking/absorbing material comprising a plurality of slits (i.e., the separation lines) to access the target area of the patient.
[0085] The device 1 may be provided with one or more apertures 12 to allow access to specific target areas, without needing to lift a flap or to pull separation lines apart. As illustrated in
[0086] The device 1 preferably has a thickness of 0.1 to 2 mm, when used in medical, dental or veterinary applications. The device 1 may be a single-use or re-usable device. In the case of a re-usable device, the device 1 is preferably washable and/or sterilizable. In a preferred embodiment, the device 1 comprises a sterilizable outer layer, or consists of a sterilizable material.
[0087] Additionally, or alternatively, there is provided within the context of the present disclosure, a shielding system comprising a radiation shield device as described herein, and a bag 11 arranged and configured to enclose the shield device. The bag 11 is preferably sterilized or sterilizable. Preferably, the device 1 is removable from the bag 11. The bag 11 may be closable, or its aperture may be folded over (in a pillow-case type construction) so as to preserve the sterility of the device 1. In a preferred embodiment, the bag 11 has substantially the same the outer shape as the device 1 it is intended to enclose. Preferably, the dimensions of the bag 11 are greater than those of the device 1. More preferably, the dimensions of the bag 11 are large enough to enclose the device 1, but small enough to prevent movement of the device 1 within the bag 11. The system allows repeated use of the device 1, as the bag 11 is discarded after each use.
[0088] The bag 11 may comprise one or more fluid-absorbent layers. For example, the bag may be made of or comprise a layer of surgical drape material.
[0089] The bag 11 may have friction properties to minimize or prevent movement of the device on 1 from the intended position on the patient (i.e., on the surface of the device facing, in use, the patient). The device 1 may comprise of be made of an anti-slip and/or friction material or components (such as rubber streaks, bands and the like).
[0090] For example, the bag 11 may have an absorbent surface facing, in use, the medical practitioner, and an anti-slip surface facing, in use, the patient.
[0091] The present disclosure is particularly useful in procedures during which the health professional must remain in the room when the radiation is emitted. This is the case in surgical and interactional procedures where imaging is needed to guide the surgeon through the patient's anatomy. One such example is fluoroscopy imaging, which enables surgeons to see the patient's internal organs and structures.
[0092] Examples of procedures which may require imaging include surgery (e.g., cardiac, vascular, gastrointestinal, pulmonary, thoracic, neurological, orthopedical, urological, gynecological), catheter insertion which requires a visualization of the circulatory system) and device implantation (e.g., ventricular assist devices, stents and pacemakers).
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[0094] The advances in non-invasive imaging technology allow for life-saving interventional procedures, with minimal patient discomfort, and vastly replace conventional open surgical procedures. The surgeons are also able to carry out more minute and accurate procedures, in areas which are difficult of access, because partially hidden by the patient's anatomy or because they require passage through small vessels. However, fluoroscopy does involve exposure to harmful radiations, and the present disclosure seeks to minimize the risks to the surgeons.
[0095] In use, the patient is positioned on a table T, and the device 1 is positioned so as to cover the target area(s) of the patient, as illustrated by
[0096] The present disclosure is particularly useful in procedures requiring access to multiple target areas, the delivery of instruments and/or medical devices to a target area through the patient's anatomy. This is often the case in keyhole and transcatheter procedures, which are favored over local invasive surgery, such as open-heart surgery. For example, a typical catheter insertion procedure involves several distinct paths and target areas along the patient's circulatory system. Various access sites to the circulatory system are available, including access in or adjacent the groin, the wrist, the neck or subclavian area, the leg. The target site may be any tissue, muscle, organ in the body, including the heart. The present disclosure may also be used in procedures requiring local access and procedure, such as orthopedic procedures (e.g., to the hand, or hip).
[0097] In a typical transcatheter procedure, the surgeon may start by lifting the flap 3b covering the groin area of the patient to insert the catheter. The flap 3b is folded about the folding line 5, and rested upon sheet 2. The folding line 5 may be a folding line 5 between the flap 3b and the sheet 2 (to enable the flap 3b to be folded upon the sheet 2), or a folding line 5 on the flap 3b (to enable the flap 3b to be folded upon itself). Alternatively, if the flap 3b comprises a bendable peripheral hem 9, the hem 9 may be bent to reveal a smaller area surrounding the target area. The radiation emitted by the radiation-emitting device X can now pass through the patient, and reach the image-processing device P so that the surgeon can visualize the groin area and more particularly the femoral artery and veins. Once the catheter is inserted, its path can be visualized by selectively lifting the flaps and/or sheet. If the access point is found to be unsuitable, then the surgeon may decide to close the flap, and attempt insertion from a different access point on the patient.
[0098] Without the device 1, the body areas of the surgeon which are not covered by radiation PPE would be continuously exposed to radiation. By selectively uncovering each target area, the exposure of the surgeon to radiation is minimized. This also means that the health professional requires less or no protective wear.
[0099] Once the procedure is completed, the device 1 may be folded along the folding lines 5 and separation lines 4 to be placed into a bag and/or discarded.
EXAMPLES
[0100] X-rays are an indispensable tool in many medical procedures and especially for cardiac catheterization. Radiation diagnostics provide the operator with vital information about the patients' anatomy and vascular structures. However, these procedures expose both the patient and the medical staff to potentially harmful ionizing radiation. Although, protection is available, current forms of Personal Protective Equipment (PPE) for medical personnel during the up to thousands of procedures per operator per year are either cumbersome, inadequate or lack functionality leading to inadequate use and possible long-term medical consequences.
[0101] The device has been tested and a 93% reduction of radiation-scatter to medical personnel has been observed (compared to using no radiation shield at all).
[0102] Device
[0103] 1×1 meter sheets of 0.5 mm lead material were obtained (CE-marked and conform to IEC 61331-1:2014 standard on protective devices for diagnostic medical X-ray radiation). They were subsequently modified with a sewing machine for prototyping. Battens were made of 2 mm styrene acrylonitrile plastic and covered with a self-adhesive carbon fiber film, then fastened with an extra strong 0.8 mm waxed polyester thread. The plastic cover was made with commercially available 60×80 cm low-density polyethylene bag with a thickness of 50 μm. Additional welds to accommodate the flaps were made with a plastic, and the end joints between the flaps were reinforced with spot welds. Sterilization was carried out using vaporized hydrogen peroxide. To validate the sterilization process, chemical indicators were disposed both on the outside and inside of the bags and changed colors to indicate that instruments have been exposed to hydrogen peroxide.
[0104] Exposure
[0105] Real life registry data were used on radiation doses from different planes over a year as a template for dosimetry experiments with a human x-ray model. Real time dosimetry was with and without the device were performed during fluoroscopy. By comparing the given radiation with received dose in this setting we found that the device provides protection in a real-life model by 93% over a year. Furthermore, the mat was most effective in settings where operator exposure is highest.
[0106] From the above description, it can be seen that the present disclosure enables optimum protection against radiation, whilst providing the versatility required in medical procedure. As illustrated hereinabove, the shield is versatile and enables health professionals to perform procedures without the concern of exposure. The radiation shield device according to the present disclosure is a useful addition to the currently available radiation PPE.
[0107] Importantly, the device according to the present disclosure: [0108] provides optimized protection for medical staff; [0109] reduces the need for cumbersome PPE wear; [0110] is easy to integrate into existing medical procedures and set ups; and provides multifunctional flaps to selectively access multiple access points and visualization areas, whilst providing protection against radiation.
[0111] Although the present disclosure has been described within the context of health applications, it is envisaged that it could have other advantageous implementations in fields in which ionizing radiations are used and/or encountered.
[0112] These and other changes can be made to the embodiments in light of the above-detailed description. In general, in the following claims, the terms used should not be construed to limit the claims to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled. Accordingly, the claims are not limited by the disclosure.