HK1244657B - Microneedle system for delivering liquid formulations and method for producing a microneedle system - Google Patents
Microneedle system for delivering liquid formulations and method for producing a microneedle systemInfo
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- HK1244657B HK1244657B HK18104269.6A HK18104269A HK1244657B HK 1244657 B HK1244657 B HK 1244657B HK 18104269 A HK18104269 A HK 18104269A HK 1244657 B HK1244657 B HK 1244657B
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Description
技术领域Technical Field
本发明涉及一种用于在皮内递送(Applikation)溶液或制剂的微针系统(简称:MNS)。本发明涉及一种微针系统,该微针系统包括遮盖元件、有效物质容器、框架、微针阵列(简称:MNA)和基板,其中,微针阵列(MNA)与框架连接并且基板具有用于容纳微针阵列的开口,遮盖元件和基板可运动地相互连接,基板与固定胶布(Fixierpflaster)连接并且框架和基板能线性地相互移动。本发明还涉及一种用于制造微针系统的方法。The present invention relates to a microneedle system (MNS) for intradermal delivery of solutions or preparations. The present invention relates to a microneedle system comprising a cover element, an active substance container, a frame, a microneedle array (MNA), and a substrate. The microneedle array (MNA) is connected to the frame, and the substrate has an opening for accommodating the microneedle array. The cover element and the substrate are movably connected to each other, the substrate is connected to a fixing tape, and the frame and the substrate are linearly movable relative to each other. The present invention also relates to a method for manufacturing the microneedle system.
按照本发明的MNS适合用于在较长的时间段上给个人、优选给病人在皮内给予(Verabreichen)药剂、有效物质、制药成分或美容成分或其它物质。The MNS according to the invention is suitable for the intradermal administration of medicaments, active substances, pharmaceutical or cosmetic ingredients or other substances to individuals, preferably patients, over a longer period of time.
背景技术Background Art
在现有技术中已知如下微针系统和装置,在这些微针系统和装置中,微针阵列用于无痛的皮内给药。Microneedle systems and devices are known in the prior art in which microneedle arrays are used for painless intradermal drug delivery.
皮肤包括多个层。最外面的皮肤层、即角质层具有已知的阻止特性(Sperreigenschaften),以便防止外来物质入侵到身体中并且防止内在物质从身体排出。角质层为此形成用于保护身体的防水膜,角质层是厚度大约为10-30微米的由扁平(kompaktierten)的角化的细胞残余部分(Zellresten)构成的复杂结构。角质层的天然的不可渗透性阻止了在皮内递送的范围中穿过皮肤给予大多数药物制剂和其它物质。The skin consists of several layers. The outermost skin layer, the stratum corneum, has known barrier properties to prevent the entry of foreign substances into the body and the excretion of internal substances from the body. The stratum corneum forms a waterproof membrane to protect the body. It is a complex structure consisting of flat, cornified cell remnants with a thickness of approximately 10-30 micrometers. The natural impermeability of the stratum corneum prevents the transdermal administration of most pharmaceutical preparations and other substances within the context of intradermal delivery.
因此,例如通过在角质层中制造微孔或切口以及通过将药剂输送或递送到角质层中或下来实现不同物质的给予。以这种方式能够例如也在皮下或皮内给予大量药剂。Thus, for example, by making micropores or incisions in the stratum corneum and by delivering or delivering the agent into or below the stratum corneum, administration of different substances can be achieved. In this way, for example, a large number of agents can also be administered subcutaneously or intradermally.
包括微针阵列(MNA)并且可选地包括其它构件的微针系统(MNS)为了使用而需要如下元件,所述元件将阵列(MNA)的微针(也称为皮肤穿透元件)挤压到皮肤上的递送部位上,以便穿透角质层并且以这种方式经由MNA在外部的药剂储器(例如容器)和皮肤之间建立流体通道。如果选择液态制剂作为药剂,则在MNS中需要打开有效物质容器的并且按照构造也将药剂从有效物质容器中挤压出的元件。为了实现最先提到的元件,已知各种不同的实施方式,这些实施方式通常利用机械的蓄能器来打开有效物质容器。例如集成到MNS中的注射器或小型泵负责从有效物质容器中的压出。For use, a microneedle system (MNS), which includes a microneedle array (MNA) and optionally other components, requires elements that press the microneedles of the array (MNA) (also called skin-penetrating elements) onto a delivery site on the skin, thereby penetrating the stratum corneum and establishing a fluid channel between an external drug reservoir (e.g., a container) and the skin via the MNA. If a liquid preparation is selected as the drug, the MNS requires elements that open the active substance container and, depending on the design, also extrude the drug from the active substance container. Various embodiments are known to implement the aforementioned elements, which typically utilize a mechanical energy reservoir to open the active substance container. For example, a syringe or a small pump integrated into the MNS is responsible for the expulsion of the active substance container.
在WO02/05889 A1中描述了一种相应简单的微针系统。该装置包括壳体,该壳体具有处于内部的柔性囊状物形式的有效物质容器。所述柔性囊状物被放置在壳体中的空腔中。该空腔由遮盖部件遮盖,该遮盖部件能够被向下挤压,以便将柔性囊状物朝向处于壳体底部的微针阵列挤压。由此打开有效物质容器,并且在柔性囊状物中包含的液体流动至多个微针。WO 02/05889 A1 describes a relatively simple microneedle system. The device comprises a housing with an active substance container in the form of a flexible bladder within. The flexible bladder is placed in a cavity within the housing. This cavity is covered by a cover member that can be pressed downward to press the flexible bladder toward the microneedle array at the bottom of the housing. This opens the active substance container, and the liquid contained in the flexible bladder flows to the plurality of microneedles.
DE60305901T2公开了一种包括壳体和药筒的装置。该药筒包含用于含有效物质的溶液的容器并且该药筒除了底壁之外还具有与底壁间隔开距离的集成有针阵列的下方的外壁。壳体包括基本件、环绕侧壁和遮盖部件,该遮盖部件能在打开位置和关闭位置之间偏转并且通过铰链、卡扣配合、压紧配合或摩擦配合与基本件连接。通过将药筒放置在壳体中来组装微针系统,其中,药筒在壳体中借助槽定位在限定的位置中。将微针系统这样放置在病人的皮肤表面上,使得针阵列刺穿皮肤表面,然后将壳体的遮盖部件偏转到关闭位置中。在遮盖部件关闭时刺穿有效物质容器。壳体的遮盖部件具有用于对药筒施加压力的弹簧并且该遮盖部件引起在遮盖部件关闭时输出含有效物质的溶液。此外,需要臂带用于固定。DE60305901T2 discloses a device comprising a housing and a cartridge. The cartridge contains a container for a solution containing an active substance and, in addition to a bottom wall, has a lower outer wall spaced apart from the bottom wall and integrated with a needle array. The housing comprises a base member, surrounding side walls, and a cover member that can be pivoted between an open and closed position and is connected to the base member by a hinge, snap fit, press fit, or friction fit. The microneedle system is assembled by placing the cartridge in the housing, where it is positioned in a defined position by means of a groove. The microneedle system is placed on the patient's skin surface so that the needle array pierces the skin surface, and the housing cover member is then pivoted into the closed position. When the cover member is closed, the active substance container is pierced. The housing cover member has a spring for applying pressure to the cartridge, and the cover member causes the solution containing the active substance to be dispensed when the cover member is closed. Furthermore, an armband is required for securement.
在现有技术中已知的用于皮内递送有效物质的装置和方法仅在有限程度中是成功的。The devices and methods known in the prior art for the intradermal delivery of active substances are successful only to a limited extent.
已知的微针系统具有如下缺点,即,这些微针系统仅在短的使用期间(数秒或更少)将力施加到MNA上并且MNA在接着的使用阶段中(数分钟直至数天)容易再次从皮肤松开。然而,对于许多应用来说,需要在递送期间或在较长的时间段上确保与皮肤的持久力锁合。Known microneedle systems have the disadvantage that they exert force on the MNA only for a short period of use (seconds or less), and the MNA easily loosens from the skin again during subsequent use (minutes to days). However, for many applications, it is necessary to ensure a permanent force lock with the skin during delivery or over a longer period of time.
此外,许多已知的微针系统具有需要如下递送器的缺点,这些递送器不是微针系统的组成部分,而是必须作为附加的分离的单元提供。对于皮内递送来说,将MNS和递送系统组合在一个单元中的构造方案是值得期望的,其中,整个系统的结构形式-尤其是结构高度和直径-不影响MNS的舒适使用或携带。Furthermore, many known microneedle systems have the disadvantage of requiring delivery devices that are not part of the microneedle system but must be provided as an additional, separate unit. For intradermal delivery, a design that combines the MNS and delivery system in a single unit is desirable, where the overall system configuration—particularly the overall height and diameter—does not affect the comfort of use or portability of the MNS.
此外,所有已知的具有液态有效物质容器的装置包括微针阵列与用于输出含有效物质的溶液的注射器、泵或弹簧的组合。这些装置由于其结构形式而在使用方面是不舒适的并且在制造方面是耗费的。需要能简单地制造和使用的装置。Furthermore, all known devices with liquid active substance containers consist of a combination of a microneedle array and a syringe, pump, or spring for dispensing the active substance-containing solution. Due to their design, these devices are uncomfortable to use and complex to manufacture. There is a need for devices that are simple to manufacture and use.
发明内容Summary of the Invention
按照本发明,该任务通过一种微针系统(MNS)来解决,所述微针系统包括遮盖元件、有效物质容器、框架、微针阵列、基板和固定胶布。According to the invention, this object is achieved by a microneedle system (MNS) comprising a cover element, an active substance container, a frame, a microneedle array, a substrate, and a fixing adhesive tape.
本发明的用于皮内递送的微针系统包括:The microneedle system for intradermal delivery of the present invention comprises:
i.)在有效物质容器上方的遮盖元件,其中,该有效物质容器被容纳在具有微针阵列的框架中;以及i.) a cover element above the active substance container, wherein the active substance container is accommodated in a frame having the microneedle array; and
ii.)基板,其中,该基板具有用于容纳微针阵列的开口,该基板具有相对于基板边缘向内错开的环绕的突出部连同开口,并且该基板在所述环绕的突出部的外侧具有与遮盖元件的螺纹互补的螺纹,并且遮盖元件和基板通过螺纹可运动地相互连接;ii.) a substrate, wherein the substrate has an opening for accommodating the microneedle array, the substrate has a circumferential protrusion offset inwardly relative to an edge of the substrate together with the opening, and the substrate has a thread on the outer side of the circumferential protrusion that is complementary to the thread of the cover element, and the cover element and the substrate are movably connected to each other via the thread;
iii.)基板完全或部分地与固定胶布连接;并且iii.) the substrate is fully or partially connected to the fixing tape; and
iv.)框架和基板可运动地相互连接,其中,具有微针阵列的框架能朝基板的开口的方向线性地运动并且基板具有至少一个用于打开有效物质容器的打开元件。iv.) The frame and the base plate are movably connected to one another, wherein the frame with the microneedle array is linearly movable in the direction of the opening of the base plate and the base plate has at least one opening element for opening the active substance container.
在按照本发明的MNS中,微针阵列与框架优选在该框架的下侧上连接并且基板具有用于容纳微针阵列的开口。In the MNS according to the invention, the microneedle array is connected to the frame, preferably on the underside of the frame, and the base plate has an opening for accommodating the microneedle array.
框架同样可以被看作用于微针阵列的支架,该框架用于固定微针阵列而且也用于容纳有效物质容器。The frame can also be regarded as a support for the microneedle array, which serves to fix the microneedle array and also to accommodate the active substance container.
遮盖元件和基板可运动地相互连接、优选通过螺纹相互连接。此外,基板完全或部分地与固定胶布连接或该基板设有胶布并且框架和基板能线性地相互移动。Covering element and substrate are movably connected to each other, preferably are connected to each other by screw thread.In addition, substrate is connected with fixing adhesive tape wholly or in part or this substrate is provided with adhesive tape and framework and substrate can move linearly mutually.
MNS优选在使用之前通过保护膜、尤其是在固定胶布上的保护膜来保护。The MNS is preferably protected before use by a protective film, in particular a fixing tape.
因此,与在现有技术中已知的微针系统不同地,按照本发明的MNS主要包括如下有效物质容器,该有效物质容器能够在一个单元中通过固定胶布与皮肤连接。按照本发明的MNS不需要附加的给药器、泵、注射器或弹簧。该微针系统能简单并且低成本地制造而成。MNS可以、但不是必须通过其它组成部件来补充。该微针系统适合用于在较长的时间段上给个人、优选给病人在皮内给予药剂、有效物质、制药成分或美容成分或其它物质。按照本发明的MNS的操作是简单的并且该操作例如能够在自我药疗的范围内由病人自己在家或在医疗点实施而且也能够在美容应用中由个人自己在家或在医疗点实施。尤其是,将微针刺入到皮肤中是例行过程并且不需要专业人员的医疗检查和监控或看管。这尤其是在较长的或要重复实施的递送中是有利的,因为病人或个人无须重复地或在较长的时间段上由专业人员来看护。这是可能的,因为MNA的针能够简单地插入到角质层中并且即使在没有补充挤压的情况下也能够在较长的时间段上保持在角质层中,从而也通过病人或个人自己借助按照本发明的MNS来保证递送期望量的药剂、有效物质、制药成分或其它物质。Therefore, unlike microneedle systems known in the prior art, the MNS according to the present invention primarily comprises an active substance container that can be connected to the skin in a single unit via a fixing patch. The MNS according to the present invention does not require additional applicators, pumps, syringes, or springs. The microneedle system can be manufactured simply and cost-effectively. The MNS can, but does not necessarily, be supplemented with other components. The microneedle system is suitable for administering medicaments, active substances, pharmaceutical or cosmetic ingredients, or other substances intradermally to individuals, preferably patients, over an extended period of time. The MNS according to the present invention is simple to operate and can be performed by patients themselves at home or at a point of care, for example, within the context of self-medication, or for cosmetic applications. In particular, inserting the microneedles into the skin is a routine procedure and does not require medical examination, monitoring, or supervision by a qualified healthcare professional. This is particularly advantageous for longer or repeated administrations, as the patient or individual does not need to be monitored repeatedly or for extended periods by a qualified healthcare professional. This is possible because the needles of the MNA can be easily inserted into the stratum corneum and can remain there for a longer period of time even without additional compression, thereby ensuring that the desired amount of medicament, active substance, pharmaceutical composition or other substance is delivered by the patient or the individual himself using the MNA according to the invention.
因此,本发明的主题在于一种用于皮内递送的微针系统,该微针系统包括:The subject of the present invention is therefore a microneedle system for intradermal delivery, comprising:
i.)在有效物质容器上方的遮盖元件,其中,该有效物质容器被容纳在具有微针阵列的框架中;以及i.) a cover element above the active substance container, wherein the active substance container is accommodated in a frame having the microneedle array; and
ii.)基板,其中,该基板具有用于容纳微针阵列的开口,并且遮盖元件和基板可运动地相互连接;ii.) a substrate, wherein the substrate has an opening for accommodating the microneedle array, and the cover element and the substrate are movably connected to each other;
iii.)基板完全或部分地与固定胶布连接;并且iii.) the substrate is fully or partially connected to the fixing tape; and
iv.)框架和基板可运动地相互连接,其中,具有微针阵列的框架能朝基板的开口的方向线性运动。iv.) The frame and the substrate are movably connected to each other, wherein the frame with the microneedle array can be linearly moved in the direction of the opening of the substrate.
此外,遮盖元件在基板上优选通过螺纹可运动地相互连接。Furthermore, the cover elements are movably connected to one another on the base plate, preferably by means of a thread.
按照本发明,术语“皮内递送(同义词:皮内给药)”表示物质通过MNA给予到皮肤中并且需要将微针刺入到皮肤中。According to the present invention, the term "intradermal delivery (synonym: intradermal administration)" means that a substance is administered into the skin via MNA and requires the insertion of microneedles into the skin.
按照本发明,在借助微针系统的固定胶布固定在皮肤上之后,在第一步骤中遮盖元件在基板上通过螺纹转动,并且以这种方式,具有微针阵列的框架朝基板的开口的方向运动。According to the invention, after fixation on the skin by means of a fixing tape for the microneedle system, in a first step the cover element is screwed on the base plate and in this way the frame with the microneedle array is moved towards the opening of the base plate.
在该运动或行程的过程中,具有微针阵列的框架达到基板的开口的平面,其中,突出的微针穿透到皮肤中。同时,一起移动的有效物质容器达到一个或多个打开元件(刺物等),从而该容器破裂并且输出溶液或制剂、更确切地说输出到设有的MNA中。以这样的方式安置打开元件,使得:一旦微针阵列达到基板的开口的平面(所谓的递送位置),则打开元件接触并且打开有效物质容器。During this movement or stroke, the frame with the microneedle array reaches the plane of the substrate's opening, where the protruding microneedles penetrate the skin. Simultaneously, the accompanying active substance container reaches one or more opening elements (such as a needle), causing it to rupture and release the solution or formulation, specifically, into the provided MNA. The opening elements are positioned so that, as soon as the microneedle array reaches the plane of the substrate's opening (the so-called delivery position), they contact and open the active substance container.
在本发明的一种优选的实施方式中,微针系统的框架具有至少一个或多个卡锁钩,所述至少一个或多个卡锁钩优选突出并且可以嵌接到基板中。基板可以具有相应的空隙部。此外,卡锁钩用作上述的遮盖元件相对于基板的转动运动中的行程的作用点。In a preferred embodiment of the present invention, the frame of the microneedle system has at least one or more latching hooks, which preferably protrude and can engage in the base plate. The base plate may have corresponding recesses. Furthermore, the latching hooks serve as the aforementioned points of engagement during the rotational movement of the cover element relative to the base plate.
卡锁钩给框架提供相对于基板的限定的位置并且也防止框架(完全)旋转、确切地说在基板上(完全)旋转。同时,卡锁钩在框架上并且空隙部在基板中这样构成,使得框架被可运动地装配在基板中。The latching hooks provide the frame with a defined position relative to the base plate and also prevent the frame from being (completely) rotated, more precisely (completely) rotated on the base plate. At the same time, the latching hooks on the frame and the recesses in the base plate are designed so that the frame can be movably mounted in the base plate.
如果框架处于基板或固定胶布的平面中,则MNA定位在基板的开口中。If the frame is in the plane of the substrate or mounting tape, the MNA is positioned in the opening of the substrate.
框架和基板可运动地相互连接、然而能线性地相互移动,其中,所述一个或多个卡锁钩应该防止框架在基板上旋转运动或转动。The frame and the base plate are movably connected to one another, but can be linearly displaced relative to one another, wherein the one or more latching hooks are intended to prevent a rotational movement or a rotation of the frame on the base plate.
在微针系统的一种特别优选的实施方式中,遮盖元件和基板通过螺纹可运动地相互连接。在微针系统的一种优选的实施方式中,有效物质容器通过四分之一螺纹转(Gewindeumdrehung)而打开。优选的转动角为90°。转动角可以按照构造处于10°与350°之间。可以给使用者显示最大转动角的达到,在最简单的情况下例如通过在止挡部中的位置标记来显示。In a particularly preferred embodiment of the microneedle system, the cover element and the base are movably connected to each other via a thread. In a preferred embodiment of the microneedle system, the active substance container is opened with a quarter turn of the thread. The preferred rotation angle is 90°. Depending on the design, the rotation angle can range from 10° to 350°. Reaching the maximum rotation angle can be indicated to the user, in the simplest case, for example, by a position marking in the stop.
在微针系统的另一种优选的实施方式中,固定胶布通过保护膜来保护。In another preferred embodiment of the microneedle system, the fixing adhesive tape is protected by a protective film.
在微针系统的另一种优选的实施方式中,微针系统的直径为至少10mm、优选为至少25mm、特别优选为至少50mm。In another preferred embodiment of the microneedle system, the diameter of the microneedle system is at least 10 mm, preferably at least 25 mm, particularly preferably at least 50 mm.
在微针系统的另一种优选的实施方式中,微针系统的高度为最大30mm、优选为最大20mm、特别优选为最大10mm。In another preferred embodiment of the microneedle system, the height of the microneedle system is a maximum of 30 mm, preferably a maximum of 20 mm, particularly preferably a maximum of 10 mm.
在微针系统的另一种优选的实施方式中,有效物质容器是吹瓶-灌装-封口(blow-fill-seal)容器或一次性容器。In another preferred embodiment of the microneedle system, the active substance container is a blow-fill-seal container or a disposable container.
在微针系统的另一种优选的实施方式中,有效物质容器具有一种或多种物质、药剂、有效物质、溶液或(液态)制剂、尤其是制药有效物质或制药成分、尤其是抗生素、抗病毒的有效物质、止痛药、麻醉剂、食欲抑制剂、抗风湿药、抗抑郁药、抗组胺剂、抗炎剂、抗肿瘤剂、疫苗(包括DNA疫苗)等、蛋白质、肽或肽片断、核酸或核酸部分以及美容品、营养增补剂、防晒剂、驱虫剂,自由基清除剂、保湿剂、着色剂。In another preferred embodiment of the microneedle system, the active substance container has one or more substances, medicaments, active substances, solutions or (liquid) preparations, in particular pharmaceutical active substances or pharmaceutical ingredients, in particular antibiotics, antiviral active substances, analgesics, anesthetics, appetite suppressants, antirheumatic drugs, antidepressants, antihistamines, anti-inflammatory agents, antitumor agents, vaccines (including DNA vaccines), etc., proteins, peptides or peptide fragments, nucleic acids or nucleic acid parts, as well as cosmetics, nutritional supplements, sunscreens, insect repellents, free radical scavengers, moisturizers, colorants.
优选地,有效物质容器包含包括有效物质和辅助物质的溶液或(液态)制剂。Preferably, the active substance container contains a solution or a (liquid) preparation comprising the active substance and auxiliary substances.
术语“溶液”或“(液态)制剂”表示涉及一种或多种物质,所述一种或多种物质具有至少一个这样的聚集状态,使得所述一种或多种物质能够在室温下在预定的递送时间内通过MNA被皮内递送。合适的黏度是0至200mPa*s之间的值。The term "solution" or "(liquid) formulation" refers to one or more substances having at least one aggregated state that enables the substance or substances to be delivered intradermally via an MNA at room temperature within a predetermined delivery time. Suitable viscosities are values between 0 and 200 mPa*s.
本发明的主题也在于一种用于制造按照本发明的微针系统的方法,该方法包括如下步骤:The present invention also provides a method for producing a microneedle system according to the invention, comprising the following steps:
a)提供有效物质容器,优选借助吹瓶-封口工艺的制造来提供有效物质容器;a) providing an active substance container, preferably by means of a blow-and-seal process;
b)提供微针阵列;并且b) providing a microneedle array; and
c)将有效物质容器和微针阵列与框架、基板和固定胶布连接成微针系统。c) Connecting the active substance container and the microneedle array to the frame, substrate and fixing tape to form a microneedle system.
本发明的主题也在于一种用于实施皮内递送的方法,该方法包括The subject of the present invention is also a method for carrying out intradermal delivery, comprising
a)借助固定胶布将按照本发明的微针系统固定在皮肤上;a) fixing the microneedle system according to the present invention on the skin by means of a fixing tape;
b)例如通过使遮盖元件相对于基板转动而将微针系统从存放位置(第一位置)转移到递送位置(第二位置)中。b) Transferring the microneedle system from the storage position (first position) into the delivery position (second position), for example by rotating the cover element relative to the base plate.
本发明的一种优选的实施方式涉及一种用于实施皮内递送的方法,该方法包括:A preferred embodiment of the present invention relates to a method for performing intradermal delivery, the method comprising:
a)借助固定胶布将如下微针系统固定在皮肤上,所述微针系统包括a) fixing the following microneedle system on the skin with a fixing tape, wherein the microneedle system comprises
i.)在有效物质容器上方的遮盖元件,其中,该有效物质容器被容纳在具有微针阵列的框架中,以及i.) a cover element above the active substance container, wherein the active substance container is accommodated in a frame having a microneedle array, and
ii.)基板,其中,该基板具有用于容纳微针阵列的开口,并且遮盖元件和基板可运动地相互连接,ii.) a substrate, wherein the substrate has an opening for accommodating the microneedle array, and the cover element and the substrate are movably connected to each other,
iii.)基板完全或部分地与固定胶布连接,并且iii.) the substrate is fully or partially connected to the fixing tape, and
iv.)框架和基板可运动地相互连接,其中,具有微针阵列的框架能朝基板的开口的方向线性运动;并且iv.) the frame and the substrate are movably connected to each other, wherein the frame having the microneedle array can be linearly moved toward the opening of the substrate; and
b)例如通过使遮盖元件(1)相对于基板转动而将微针系统从存放位置(第一位置)转移到递送位置(第二位置)中,其中,有效物质容器通过打开元件打开。b) The microneedle system is transferred from the storage position (first position) into the delivery position (second position), for example by rotating the cover element (1) relative to the base plate, wherein the active substance container is opened by the opening element.
本发明的主题也在于一种用于皮内递送的方法,该方法包括:The subject of the present invention is also a method for intradermal delivery, comprising:
a)借助固定胶布将按照本发明的微针系统固定在皮肤上;a) fixing the microneedle system according to the present invention on the skin by means of a fixing tape;
b)例如通过转动遮盖元件和基板之间的螺纹而将按照本发明的微针系统从存放位置转移到递送位置中;b) transferring the microneedle system according to the invention from the storage position into the delivery position, for example by rotating a thread between the cover element and the base plate;
c)将一种或多种物质递送到个人皮肤的所选区域中。c) delivering one or more substances to selected areas of an individual's skin.
同样地,本发明的主题在于准备用于在按照本发明的微针系统中的皮内递送的一种或多种物质、药剂、有效物质、溶液或(液态)制剂。Likewise, the present invention relates to one or more substances, medicaments, active ingredients, solutions or (liquid) preparations to be delivered intradermally in the microneedle system according to the invention.
按照本发明的MNS可以包括一个或多个MNA并且包括一个或多个有效物质容器。按照本发明的MNS能够实现无痛地刺穿角质层并且能够以小的力消耗实现将微针穿透到皮肤中。按照本发明的MNS能够特别有利地实现与皮肤的恒定力锁合并且实现在递送期间在皮肤与MNA之间维持恒定且持久的力锁合。按照本发明的MNS以这样的方式构成,使得在使用时首先将该MNS安置并且固定在皮肤上。MNA处于第一位置-存放位置中。通过使遮盖元件围绕基板转动,框架线性地朝基板移动(递送机构)。在此,MNA从存放位置运动到递送位置中并且同时通过打开元件打开有效物质容器。在有效物质容器中包含的溶液从有效物质容器流动到MNA中或流动到微针中。在递送位置中,微针已刺穿角质层并且穿透到皮肤中。通过微针在皮内递送液体。通过操作递送机构,在皮肤和MNS之间产生并且维持恒定的张力。由此,在整个的皮内递送期间在MNS和皮肤之间存在持久的力锁合,从而也能够在较长的时间段上给予溶液。MNA在整个递送期间保留在皮肤中,但MNA的针不会从皮肤松开。The MNS according to the present invention can include one or more MNAs and one or more active substance containers. The MNS according to the present invention enables painless piercing of the stratum corneum and allows microneedles to penetrate the skin with minimal effort. The MNS according to the present invention is particularly advantageous for achieving a constant force connection with the skin and maintaining a constant and lasting force connection between the skin and the MNA during delivery. The MNS according to the present invention is designed so that, during use, it is first positioned and secured on the skin. The MNA is in a first position—the storage position. By rotating the cover element about the base plate, the frame (delivery mechanism) is linearly moved toward the base plate. The MNA is moved from the storage position to the delivery position, and the active substance containers are simultaneously opened by the opening element. The solution contained in the active substance containers flows from the active substance containers into the MNA or into the microneedles. In the delivery position, the microneedles have already pierced the stratum corneum and penetrated into the skin. The liquid is delivered intradermally via the microneedles. By operating the delivery mechanism, a constant tension is generated and maintained between the skin and the MNS. As a result, there is a permanent force-locking connection between the MNA and the skin during the entire intradermal delivery, so that the solution can also be administered over a longer period of time. The MNA remains in the skin during the entire delivery period, but the needles of the MNA do not come loose from the skin.
遮盖元件具有与基板的形状和尺寸互补的形状和尺寸。遮盖元件和基板构成壳体。优选地,遮盖元件具有螺纹用于将遮盖元件锁定在关闭位置中并且用于将MNA从存放位置转移到递送位置中。The cover element has a shape and size that complements the shape and size of the base plate. The cover element and the base plate form a housing. Preferably, the cover element has a thread for locking the cover element in the closed position and for transferring the MNA from the storage position to the delivery position.
遮盖元件具有上侧和底侧,其中,底侧向内指向地朝向基板并且优选与卡锁钩接触。遮盖元件例如具有拱形盖的形状。优选地,遮盖元件在上侧具有使从存放位置到递送位置中的转移变得容易的结构。例如遮盖元件在上侧具有一个或多个防止滑脱的沟槽。此外,遮盖元件可以具有一个或多个标记部,所述一个或多个标记部规定如何能将MNS从存放位置转移到递送位置中。底侧具有环绕的螺纹,该螺纹与基板的螺纹互补,从而遮盖元件和基板能够通过螺纹转动而连接。同时,在遮盖元件和基板之间的螺纹的转动引起MNA从存放位置转移到递送位置中。The cover element has an upper side and an underside, with the underside pointing inward toward the base plate and preferably contacting the latching hooks. The cover element may, for example, have the shape of a dome-shaped cover. Preferably, the cover element has features on its upper side that facilitate transfer from the storage position to the delivery position. For example, the cover element may have one or more grooves on its upper side to prevent slippage. Furthermore, the cover element may have one or more markings that specify how the MNS can be transferred from the storage position to the delivery position. The underside has a circumferential thread that complements the thread of the base plate, allowing the cover element and base plate to be connected by rotating the thread. Simultaneously, rotating the thread between the cover element and base plate causes the MNS to transfer from the storage position to the delivery position.
遮盖元件和基板构成内部具有空腔的壳体,该空腔适合用于容纳框架、MNA和有效物质容器。The cover element and the base plate form a housing having a cavity inside, which is suitable for accommodating the frame, the MNA and the active substance container.
基板具有相对于基板边缘向内错开的环绕的突出部连同开口。该突出部用作用于产生空腔的距离保持部。在所述边缘的外侧上设有与遮盖元件的螺纹互补的螺纹。为了产生空腔,将遮盖元件套装到基板上并且不进行螺纹转动。通过一个部分的或完全的螺纹转或通过多个螺纹转,由遮盖元件和基板限定的空腔变小。The base plate has a circumferential projection with an opening that is offset inward from the base plate edge. This projection serves as a distance element for creating a cavity. Threads complementary to the threads of the cover element are provided on the outer side of the edge. To create the cavity, the cover element is placed onto the base plate without turning the threads. A partial or complete thread turn, or multiple thread turns, reduces the cavity defined by the cover element and base plate.
在存放位置中,MNA处于皮肤上方,微针不被穿透到角质层中。在过渡到递送位置中时,空腔变小并且MNA下降。此时,微针穿透到皮肤中、优选穿透到角质层中或穿过角质层并且微针在递送的持续时间或使用MNS的持续时间内保留在该位置中。In the storage position, the MNA is above the skin, and the microneedles do not penetrate the stratum corneum. During the transition to the delivery position, the cavity decreases and the MNA descends. The microneedles then penetrate the skin, preferably into or through the stratum corneum, and remain in this position for the duration of the delivery or use of the MNS.
框架这样确定尺寸,使得该框架能够容纳有效物质容器。优选将有效物质容器这样放入或固定到框架中,使得该有效物质容器在螺纹转动时同样线性地相对于基板移动。The frame is dimensioned in such a way that it can accommodate the active substance container. The active substance container is preferably placed or fastened in the frame in such a way that it is also linearly displaced relative to the base plate when the thread is turned.
有效物质容器由能被至少一个打开元件打开的材料制成。在本发明的优选实施方式中,有效物质容器利用吹瓶-灌装-封口工艺制造而成。相应的方法在现有技术中已知并且例如在Andrew.W.Goll(国际药物工程协会(2012)知识简介,KB-0025-Jun12)中说明。按照本发明的MNS的特别优选的实施方式涉及这样的使用吹瓶-灌装-封口容器的实施方式。The active substance container is made of a material that can be opened by at least one opening element. In a preferred embodiment of the present invention, the active substance container is manufactured using a blow-fill-seal process. Corresponding methods are known in the art and are described, for example, in Andrew W. Goll (International Pharmaceutical Engineering Association (2012) Knowledge Brief, KB-0025-Jun 12). A particularly preferred embodiment of the MNS according to the present invention involves such an embodiment using a blow-fill-seal container.
此外,按照本发明的MNS包括用于将MNS紧固在皮肤上的固定胶布。在此,术语固定胶布包括每种适合用于将MNS紧固在皮肤表面上的紧固器件。固定胶布例如可以包括固定载体并且包括化学物质或生物学物质、优选粘接剂。固定胶布也可以仅包括一种或多种化学物质和/或生物学物质或由它们制成,其中,所述一种或多种化学物质和/或生物学物质被直接施加到基板的下侧上并且适合用于将MNS紧固在皮肤表面上。固定胶布同样可以具有结构化表面或由该结构化表面制成、例如适合用于将NMS紧固在皮肤表面上的纳米结构。重要的是,通过固定胶布在皮肤表面上产生相应强烈的紧固和固定,从而在皮肤和MNA之间产生恒定的力锁合并且在皮肤和MNA之间的该力锁合在递送期间保持存在。适合的固定胶布根据在所涉及的区域(例如腹部或背部)中的皮肤张力、在所涉及的区域中的角质层中和下的脂肪组织的份额、个人的体质指数(Body-Mass-Index)、个人的年龄、个人的饮食习惯(例如液体的摄入)、个人的生活习惯(例如所涉及的皮肤区域的日照)以及可选地其它因素来选择。相应地,可以由专业人员分别为不同的个人或病人和/或皮肤区域选择合适的固定胶布。此外,固定胶布根据MNS的大小和在MNS中使用的材料或这些材料的重量来选择。合适的固定胶布的示例是,将常见的商业上可获得的(附着)粘接剂涂敷到载体上、必要时也双面涂敷到载体上。The MNS according to the present invention also includes a fixing patch for fastening the MNS to the skin. The term "fixing patch" herein encompasses any fastening device suitable for fastening the MNS to the skin surface. The fixing patch can, for example, include a fixing carrier and a chemical or biological substance, preferably an adhesive. The fixing patch can also simply include or consist of one or more chemical and/or biological substances, wherein the one or more chemical and/or biological substances are applied directly to the underside of the substrate and are suitable for fastening the MNS to the skin surface. The fixing patch can also have or consist of a structured surface, such as nanostructures suitable for fastening the MNS to the skin surface. It is important that the fixing patch creates a sufficiently strong fastening and fixation on the skin surface, thereby creating a constant force-locking connection between the skin and the MNS, and that this force-locking connection between the skin and the MNS is maintained during delivery. Suitable fixing tapes are selected based on the skin tension in the affected area (e.g., the abdomen or back), the amount of fat tissue in and beneath the stratum corneum in the affected area, the individual's body mass index (BMI), their age, their dietary habits (e.g., fluid intake), their lifestyle (e.g., sun exposure of the affected skin area), and optionally other factors. Accordingly, a professional can select suitable fixing tapes for different individuals or patients and/or skin areas. Furthermore, the fixing tape is selected based on the size of the MNS and the materials used therein or the weight of these materials. Examples of suitable fixing tapes are common commercially available (adhesion) adhesives applied to a carrier, optionally also applied to both sides of the carrier.
固定胶布固定地与基板连接。在一种特别的实施方式中,固定胶布是基板的组成部分。固定胶布具有一个或多个空隙部,MNA的微针在调节递送位置时被引导穿过所述一个或多个空隙部并且在递送期间突出穿过所述一个或多个空隙部。固定胶布的留有空隙的区域可以在递送之前或在固定在皮肤上之前可选地通过保护膜等来保护。The fixing tape is fixedly connected to the substrate. In a particular embodiment, the fixing tape is an integral part of the substrate. The fixing tape has one or more interstices through which the microneedles of the MNA are guided when adjusting the delivery position and protrude during delivery. The interstices of the fixing tape can optionally be protected by a protective film or the like before delivery or before being fixed to the skin.
按照本发明,微针阵列(MNA)(同义词:微针贴片或微针垫片)具有一个或多个皮肤穿透元件。在一些实施方式中,所述皮肤穿透元件布置在行和列的阵列中,所述行和列彼此间隔开基本上均匀的距离。皮肤穿透元件的实际长度和间隔可以与要给予的溶液和在个人或病人身体上的给予部位有关。典型地,所述皮肤穿透元件是针、优选空心针,所述针固定在载体上或旁并且从该载体突出。皮肤穿透元件布置在如下阵列中,该阵列设置用于在限定的时间段上穿过个人/病人的皮肤给予有效量的溶液。典型地,所述微针阵列具有大约1cm2至大约10cm2的面积并且优选具有大约2-5cm2的面积。According to the present invention, a microneedle array (MNA) (synonyms: microneedle patch or microneedle pad) has one or more skin-penetrating elements. In some embodiments, the skin-penetrating elements are arranged in an array of rows and columns that are spaced apart by substantially uniform distances from one another. The actual length and spacing of the skin-penetrating elements may depend on the solution to be administered and the site of administration on the body of the individual or patient. Typically, the skin-penetrating elements are needles, preferably hollow needles, that are affixed to or adjacent to a support and protrude from the support. The skin-penetrating elements are arranged in an array configured to administer an effective amount of solution through the skin of the individual/patient over a defined period of time. Typically, the microneedle array has an area of about 1 cm 2 to about 10 cm 2 and preferably has an area of about 2-5 cm 2 .
优选地,所述皮肤穿透元件是空心针,所述空心针分别具有一个轴向通道和一个倾斜的逐渐成尖形的外部尖端,所述外部尖端用于刺穿个人/病人的皮肤。皮肤穿透元件被这样安置在固定载体中的孔中,使得溶液能够从有效物质容器流动穿过空心针的轴向通道。皮肤穿透元件可以借助适合的粘接剂或借助压紧配合被紧固在固定载体的开口中。在一种备选的实施方式中,微型皮肤穿透元件可以与固定载体构成为一体。优选地,各皮肤穿透元件分别具有一个倾斜的逐渐成尖形的尖端和一个轴向通道,以便在有效物质容器和病人皮肤中的皮内部位之间建立流体连接。Preferably, the skin penetrating elements are hollow needles, each having an axial channel and an inclined, tapering external tip for piercing the skin of the individual/patient. The skin penetrating elements are arranged in a hole in the fixed carrier in such a way that a solution can flow from the active substance container through the axial channel of the hollow needle. The skin penetrating elements can be fastened in the opening of the fixed carrier by means of a suitable adhesive or by means of a press fit. In an alternative embodiment, the miniature skin penetrating elements can be integrally formed with the fixed carrier. Preferably, each skin penetrating element has an inclined, tapering external tip and an axial channel in order to establish a fluid connection between the active substance container and the intradermal site in the patient's skin.
皮肤穿透元件优选具有适合用于实现期望的皮肤穿透深度的长度。皮肤穿透元件的长度和厚度基于要给予的溶液和皮肤厚度以及安置MNS所在的目标区域来选择。在本发明的实施方式中,所述皮肤穿透元件可以是微针、微管、实心针或空心针、刺血针等。在一种优选的实施方式中,所述皮肤穿透元件是由不锈钢制成的空心针或空心套管。所述针为大约24标准规格(Gauge)至50标准规格那么大并且优选为大约30标准规格至大约36标准规格那么大并且在最强烈优选的变型方案中为大约34标准规格那么大。较小的针相比于较大的针更容易穿透皮肤表面并且通常是优选的。所述针处于框架的下侧上的MNS中,以便提供大约50微米至大约5000微米的有效长度。在另一种实施方式中,所述针具有大约500微米至大约3000微米的有效长度。在其它实施方式中,所述针可以具有在大约1000微米至2000微米的范围中的有效长度。典型地,所述针具有大约500微米至大约1000微米的有效长度。The skin-penetrating element preferably has a length suitable for achieving the desired skin penetration depth. The length and thickness of the skin-penetrating element are selected based on the solution to be administered, the thickness of the skin, and the target area where the MNS is to be placed. In embodiments of the present invention, the skin-penetrating element may be a microneedle, microtube, solid or hollow needle, lancet, or the like. In a preferred embodiment, the skin-penetrating element is a hollow needle or hollow cannula made of stainless steel. The needle is approximately 24 gauge to 50 gauge, preferably approximately 30 gauge to approximately 36 gauge, and in the most preferred embodiment, approximately 34 gauge. Smaller needles penetrate the skin surface more easily than larger needles and are generally preferred. The needle is positioned in the MNS on the underside of the frame to provide an effective length of approximately 50 microns to approximately 5000 microns. In another embodiment, the needle has an effective length of approximately 500 microns to approximately 3000 microns. In other embodiments, the needle may have an effective length ranging from approximately 1000 microns to 2000 microns. Typically, the needle has an effective length of about 500 microns to about 1000 microns.
MNS的组成部分、尤其是遮盖元件、框架、基板、可选地MNA的载体材料和/或可选地固定胶布的载体材料可以由适合的塑料材料制成。典型地,为此使用不反应的、惰性的、良好耐受的、生物相容的、例如皮肤病理学上测试过的塑料材料。合适的塑料材料包括聚乙烯、聚丙烯、聚酯、聚酰胺、聚碳酸酯和由它们组成的共聚物。The components of the MNS, in particular the cover element, the frame, the base plate, the optional carrier material of the MNA, and/or the optional carrier material of the adhesive patch, can be made of a suitable plastic material. Typically, non-reactive, inert, well-tolerated, biocompatible plastic materials, for example those tested in dermatology, are used for this purpose. Suitable plastic materials include polyethylene, polypropylene, polyester, polyamide, polycarbonate, and copolymers thereof.
在MNA中,皮肤穿透元件形成例如以彼此间隔开距离的行和列形式的阵列(即布置结构)。在此,在MNA中可以设有一个、至少两个、多个或大量皮肤穿透元件,例如可以设有10-1000000个、优选50-100000个、特别优选100-10000个皮肤穿透元件。MNA例如可以由硅晶片制造而成,所述硅晶片为了构成各个针而被机器加工和蚀刻。在备选的实施方式中,NMA可以由不锈钢、钨钢以及由包括镍、钼、铬、钴和钛的合金制造而成。在其它实施方式中,MNA可以由陶瓷材料、玻璃、聚合物和其它不反应的材料制造而成。In an MNA, the skin-penetrating elements are formed into an array (i.e., an arrangement) in the form of rows and columns spaced apart from one another. In this context, an MNA may include one, at least two, a plurality, or a large number of skin-penetrating elements, for example, 10-1,000,000, preferably 50-100,000, and particularly preferably 100-10,000 skin-penetrating elements. An MNA may be manufactured, for example, from a silicon wafer that has been machined and etched to form the individual needles. In alternative embodiments, an MNA may be manufactured from stainless steel, tungsten steel, and alloys including nickel, molybdenum, chromium, cobalt, and titanium. In other embodiments, an MNA may be manufactured from ceramic materials, glass, polymers, and other non-reactive materials.
皮肤穿透元件阵列典型地以行和列的形式布置,但所述皮肤穿透元件可以以其它适合的样式布置。优选地,皮肤穿透元件以足够的程度彼此间隔开距离,以便各皮肤穿透元件能够穿透皮肤直至基本上在整个阵列上均匀的深度,而不会相互干涉。在此,所述针的优选穿透深度由角质层得出,所述角质层优选完全或几乎完全被刺穿。在优选的实施方式中,皮肤穿透元件穿透皮肤直至均匀的深度和/或刺穿皮肤,以便在所选择的皮肤深度中给予溶液并且在给予物质时降低泄漏风险。在所述阵列中的皮肤穿透元件的数量可以按照皮肤穿透元件的尺寸、要给予的物质和穿透深度而变化。The skin penetration element array is typically arranged in rows and columns, but the skin penetration elements can be arranged in other suitable patterns. Preferably, the skin penetration elements are spaced apart from each other to a sufficient degree so that each skin penetration element can penetrate the skin to a depth substantially uniform across the entire array without interfering with each other. The preferred penetration depth of the needle is derived from the stratum corneum, which is preferably pierced completely or almost completely. In a preferred embodiment, the skin penetration elements penetrate the skin to a uniform depth and/or pierce the skin to allow for administration of a solution at a selected skin depth and to reduce the risk of leakage when administering a substance. The number of skin penetration elements in the array can vary according to the size of the skin penetration element, the substance to be administered, and the penetration depth.
按照本发明的MNS可以包括一个或多个有效物质容器。所述有效物质容器可以具有不同体积或设计用于被不同体积的溶液填充。所述体积根据要给予的(有效)物质或要给予的药剂、所选择的制剂、剂量、治疗方案和其它因素来选择。递送持续时间与有效物质容器的体积、要给予的(有效)物质、所选择的制剂、剂量、治疗方案、所选择的MNA(例如皮肤穿透元件的内径)、在所涉及的区域中的皮肤状况和其它因素有关。例如,MNS适合用于0.5分钟-10天、优选5分钟-1天、优选1-5小时、特别优选大约2小时的递送。在该时间期间,通过按照本发明的MNS确保在皮肤和MNA之间的恒定力锁合,而无须对针进行补充挤压。The MNS according to the present invention can include one or more active substance containers. These active substance containers can have different volumes or be designed to be filled with different volumes of solution. The volume is selected based on the (active) substance or medicament to be administered, the selected formulation, dosage, treatment regimen, and other factors. The duration of delivery depends on the volume of the active substance container, the (active) substance to be administered, the selected formulation, dosage, treatment regimen, the selected MNA (e.g., the inner diameter of the skin-penetrating element), the skin condition in the area involved, and other factors. For example, the MNS is suitable for a delivery period of 0.5 minutes to 10 days, preferably 5 minutes to 1 day, preferably 1 to 5 hours, and particularly preferably approximately 2 hours. During this time, the MNS according to the present invention ensures a constant force lock between the skin and the MNA, without the need for additional compression of the needle.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
示例性地通过以下附图和示例阐释按照本发明的MNS的一种实施方式。An embodiment of the MNS according to the present invention is explained by way of example using the following figures and examples.
图1:示出按照本发明的MNS的组成部分的分解图。在示出的示例性的构造方案中,整个系统在构件-固定胶布和保护膜中具有50mm的最大直径并且整个系统具有大约7mm的总高度。FIG1 shows an exploded view of the components of the MNS according to the invention. In the exemplary embodiment shown, the entire system has a maximum diameter of 50 mm with the component fixing adhesive and protective film and an overall height of approximately 7 mm.
图2:示出所述MNS在存放位置中的剖视图。FIG. 2 shows a cross-sectional view of the MNS in the storage position.
图3:示出所述MNS在递送位置中的剖视图。Figure 3: A cross-sectional view showing the MNS in the delivery position.
具体实施方式DETAILED DESCRIPTION
示例1:按照图1的MNS的结构:Example 1: Based on the structure of the MNS in Figure 1:
有效物质溶液处于吹瓶-灌装-封口容器2中,该吹瓶-灌装-封口容器处于框架3中。MNA 4与框架3的下侧连接。框架3被可运动地装配在基板5中,在此,框架3和基板5能相互线性地移动,在框架4上的卡锁钩在此限定行程并且防止旋转运动。基板5固定地与固定胶布6连接并且在使用之前通过保护膜7来保护。盖3和基板5通过螺纹可运动地连接。The active substance solution is contained in a blow-fill-seal container 2, which is housed in a frame 3. An MNA 4 is connected to the underside of the frame 3. The frame 3 is movably mounted in a base plate 5. The frame 3 and base plate 5 can be moved linearly relative to each other. Latching hooks on the frame 4 limit the travel and prevent rotational movement. The base plate 5 is securely connected to a fixing tape 6 and protected by a protective film 7 before use. The lid 3 and base plate 5 are movably connected via threads.
示例2:递送机构的使用:Example 2: Use of delivery agencies:
从在按照图2的存放位置中的MNS的剖视图出发,首先去除保护膜7并且通过固定胶布6将MNS固定在皮肤上。Starting from the sectional view of the MNS in the storage position according to FIG. 2 , the protective film 7 is first removed and the MNS is fixed to the skin by means of the fixing adhesive tape 6 .
通过使盖3围绕基板5转动四分之一螺纹转,吹瓶-灌装-封口容器、框架3和MNA 4线性地朝基板5移动并且有效物质容器2通过基板5上的刺物(打开元件8)打开。By rotating the cover 3 by a quarter of a thread turn about the base plate 5 , the blow-fill-seal container, the frame 3 and the MNA 4 are moved linearly toward the base plate 5 and the active substance container 2 is opened by the piercing element (opening element 8 ) on the base plate 5 .
Claims (19)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15162636 | 2015-04-07 | ||
| EP15162636.3 | 2015-04-07 | ||
| PCT/EP2016/057675 WO2016162449A1 (en) | 2015-04-07 | 2016-04-07 | Microneedle system for administering liquid formulations |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| HK1244657A1 HK1244657A1 (en) | 2018-08-17 |
| HK1244657B true HK1244657B (en) | 2022-05-06 |
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