摘要:
A topical dermal delivery device, such as a patch, for topical delivery of nitric oxide (NO) to treatment sites of mammals is disclosed. The topical nitric oxide delivery device is provided for arrangement at a treatment site, and comprises a nitric oxide releasing fluid in use of said device, wherein said nitric oxide releasing fluid is at least partly liquid; a reservoir arranged to retain said nitric oxide releasing fluid; and a nitric oxide permeable layer adapted to adhere to said treatment site and adapted to provide an interfacial area for efficient transport of nitric oxide from said nitric oxide releasing fluid to said treatment site; wherein at least said nitric oxide permeable layer is geometrically flexible such that a loss of said interfacial area between said nitric oxide permeable layer and said treatment area is substantially avoided in use of said device, whereby said device is adapted to provide a desired, controllable and consistent delivery of said nitric oxide even under physical deformation of said device from said reservoir to said treatment site while avoiding transport of undesired species from said reservoir to said treatment site.
摘要:
Apparatus, methods, and systems for delivering nitric oxide to a disease or cosmetic treatment site involve a nitric oxide (NO) precursor and a reducing agent capable of forming a transient complex with NO contained within a pouch. The NO precursor is separated from the reducing and complexing agent by a removable or breakable barrier. Nitric oxide production and release is activated by breaking or removing the barrier to allow NO precursor to mix with the reducing/complexing agent, which may optionally act as an indicator of NO concentration in a device. NO release from the device is regulated by the ratio of NO precursor to reducing/complexing agent and/or the thickness of a NO permeable membrane located between the compartment and a treatment site.
摘要:
A topical dermal delivery device, such as a patch, for topical delivery of nitric oxide (NO) to treatment sites of mammals is disclosed. In an embodiment the patch has three layers; a backing with an activation window, a absorbent core as a reservoir and an NO permeable membrane with an adhesive layer towards the skin. The NO donor is applied into the device as a solution prior to application through the activation window. The window is closed after activation and the lid and backing is non-permeable for NO in order to increase the partial pressure of NO and thus the concentration of dissolved NO. The patch is fixated on the area to be treated with an adhesive layer that also assures sufficient contact throughout the treatment. The generated NO moves within the patch and can escape through the NO permeable membrane towards the area to be treated. Depending on therapy needed, the patch release curve differs and is chosen accordingly.