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    • 1. 发明授权
    • Flow-through methods and apparatus for iontophoresis application of
medicaments at a controlled pH
    • 用于离子电渗疗法的流通方法和装置在受控pH下应用药物
    • US4886489A
    • 1989-12-12
    • US64813
    • 1987-06-19
    • Stephen C. JacobsenTomasz J. PetelenzRobert L. Stephen
    • Stephen C. JacobsenTomasz J. PetelenzRobert L. Stephen
    • A61M35/00A61N1/04A61N1/30
    • A61N1/0432A61N1/0448
    • Methods and apparatus for administering known quantities of medicaments by iontophoresis, while avoiding burns caused by extremes in the pH of the medicament medium during passage of an electric current, are disclosed. It is known that as iontophoresis progresses in conventional iontophoresis systems, the electrolysis of water occurs to produce hydrogen or hydroxyl ions at the interface of the electrode and medicament medium. Since these ions are highly mobile, they are transported directly into the skin of a patient in preference to the larger medicament ions. Thus, extreme changes in pH are experienced which result in burns due to the acidification or alkalinization of the medicament medium and passage of electric current through the skin. In addition, the efficiency of iontophoresis decreases over time. The present invention avoids extremes in pH by removing the hydrogen or hydroxyl ions which are created during iontophoresis and creates conditions for constant delivery over prolonged periods of time.In the present invention, the medicament medium adjacent the patient is periodically or constantly replaced by adding fresh medicament medium which is at the original pH. The present invention also discloses a flow-through electrode which allows new solution to constantly flow into the iontophoresis area.
    • 公开了通过离子电渗法施用已知量的药物的方法和装置,同时避免了在电流通过过程中由药物介质的pH极端引起的烧伤。 众所周知,在常规离子电渗系统中离子电渗进行时,发生电解水以在电极和药物介质的界面产生氢或羟基离子。 由于这些离子是高度移动的,所以它们优先于较大的药物离子直接转运到患者的皮肤中。 因此,经历了pH的极端变化,其由于药物介质的酸化或碱化以及电流通过皮肤而导致燃烧。 此外,离子电渗疗法的效率随时间而降低。 本发明通过除去在离子电渗疗法期间产生的氢或羟基离子来避免pH值的极端,并且产生在长时间内恒定输送的条件。 在本发明中,通过添加处于原始pH值的新鲜药物培养基来定期或不断地替换邻近患者的药物介质。 本发明还公开了一种允许新溶液不断流入离子电渗区的流通电极。
    • 4. 发明授权
    • Methods and apparatus for iontophoresis application of medicaments at a
controlled ph through ion exchange
    • 用于通过离子交换在受控ph中应用药物的离子电渗疗法的方法和装置
    • US4915685A
    • 1990-04-10
    • US64769
    • 1987-06-19
    • Tomasz J. PetelenzStephen C. JacobsenRobert L. StephenJiri Janata
    • Tomasz J. PetelenzStephen C. JacobsenRobert L. StephenJiri Janata
    • A61N1/30
    • A61N1/0432A61N1/0448
    • Methods and apparatus for administering known quantities of medicaments by iontophoresis, while avoiding burns caused by extremes in the pH of the medicament medium during passage of an electric current, are disclosed. It is known that as iontophoresis progresses in conventional iontophoresis systems, the electrolysis of water occurs to produce hydrogen or hydroxyl ions at the interface of the electrode and medicament medium. Since these ions are highly mobile, they are transported directly into the skin of a patient in preference to the larger medicament ions. Thus, extreme changes in pH are experienced which result in burns due to the acidificaion or alkalinization of the medicament medium and passage of electric current through the skin. In addition, the efficiency of iontophoresis decreases over time. The present invention avoids extremes in pH by removing the hydrogen or hydroxyl ions which are created during iontophoresis and creates conditions for constant delivery over prolonged periods of time.In the present invention, the medicament ions are attached to an ion exchange matrix, such as an ion exchange resin. When the medicament leaves the ion exchange matrix, the vacated active site is filled by the produced electrolysis products, thereby allowing iontophoresis to progress at a relatively constant pH.
    • 公开了通过离子电渗法施用已知量的药物的方法和装置,同时避免了在电流通过过程中由药物介质的pH极端引起的烧伤。 众所周知,在常规离子电渗系统中离子电渗进行时,发生电解水以在电极和药物介质的界面产生氢或羟基离子。 由于这些离子是高度移动的,所以它们优先于较大的药物离子直接转运到患者的皮肤中。 因此,经历了pH的极端变化,其由于药物介质的酸化或碱化以及电流通过皮肤而导致燃烧。 此外,离子电渗疗法的效率随时间而降低。 本发明通过除去在离子电渗疗法期间产生的氢或羟基离子来避免pH值的极端,并且产生在长时间内恒定输送的条件。 在本发明中,药物离子连接到离子交换基质如离子交换树脂上。 当药物离开离子交换基质时,所产生的电解产物填充空位的活性位点,从而允许离子电渗在相对恒定的pH下进行。
    • 8. 发明授权
    • Methods and apparatus for iontophoresis application of medicaments
    • 离子电渗法应用药物的方法和装置
    • US4752285A
    • 1988-06-21
    • US841329
    • 1986-03-19
    • Tomasz J. PetelenzRobert L. StephenStephen C. Jacobsen
    • Tomasz J. PetelenzRobert L. StephenStephen C. Jacobsen
    • A61K9/00A61N1/30
    • A61N1/0432
    • Methods and apparatus for administering known quantities of medicaments by iontophoresis while avoiding burns caused by extremes in the pH of the medicament medium during passage of an electric current are disclosed. It has been found that, as iontophoresis progresses in conventional iontophoresis systems, the electrolysis of water occurs to produce hydrogen or hydroxyl ions at the interface of the electrode and medicament medium. Since these ions are highly mobile, they are transported directly into the skin of patient in preference to the larger medicament ions. Thus, extreme changes in pH are experienced which result in burns due to the acidification or alkalinization of the medicament medium and passage of electric current through the skin. The present invention also avoids the production of other competing ions by employing a reactive electrode. The electrode and the medicament are chosen such that the electrode will react with the complementary ion (the ion which forms upon the dissociation of the medicament in solution) to form an insoluble material.
    • 公开了用于通过离子电渗疗法施用已知量的药物的方法和装置,同时避免在电流通过期间由药物介质的pH极端引起的烧伤。 已经发现,随着离子电渗在常规离子电渗系统中进行,水的电解发生在电极和药物介质的界面处产生氢或羟基离子。 由于这些离子是高度移动的,所以它们优先于较大的药物离子直接转运到患者的皮肤中。 因此,经历了pH的极端变化,其由于药物介质的酸化或碱化以及电流通过皮肤而导致燃烧。 本发明还通过使用反应性电极避免生产其它竞争离子。 选择电极和药物使得电极将与互补离子(溶液中的药物解离时形成的离子)反应以形成不溶性材料。