Fluid medication delivery device
View Patent ↗A fluid delivery device for transdermal delivery of a fluid to a patient. The device comprises an envelope that may be applied to a patient's skin. The envelope comprises at least one diffusion layer coupled to at least one impermeable layer such that at least a chamber is defined therebetween. Other embodiments include internal diffusion layers, and thus possess additional chambers, as well. In one arrangement, an adhesive boundary layer permits the device to be removably secured to a patient and inhibits radial migration of fluid beyond the periphery of the device. In another arrangement, preferably, an anti-microbial layer is provided to inhibit the growth of microorganisms.
1. A fluid medication delivery device, comprising:
a first fluid impermeable layer;
a diffusion layer, said diffusion layer and said first fluid impermeable layer cooperating to define a space therebetween, said space defining a fluid reservoir of said delivery device, said diffusion layer and said first fluid impermeable layer having a continuous seal therebetween to define a periphery of said fluid reservoir;
a second fluid impermeable layer between said first fluid impermeable layer and said diffusion layer comprising a plurality of openings collectively defining a diffusion area of said device, wherein a lowermost surface of the first fluid impermeable layer and an uppermost surface of the second fluid impermeable layer define a generally unobstructed, hollow cavity between the respective surfaces;
a fluid inlet communicating with said fluid reservoir, said fluid inlet comprising a valve configured to permit fluid entry into said fluid reservoir, said fluid inlet adapted to permit said delivery device to be selectively connectable to a supply of fluid;
wherein a fluid is diffusable across said diffusion layer in response to a pressure imparted on said fluid.
2. The delivery device of claim 1 , wherein said plurality of openings define a plurality of holes.
3. The delivery device of claim 2 , wherein said holes have a diameter between 0.25 μm and 0.254 mm.
4. The delivery device of claim 1 , wherein said second fluid impermeable layer contacts said diffusion layer.
5. The delivery device of claim 1 wherein, said second fluid impermeable layer contacts substantially an entire surface of said diffusion layer.
6. The delivery device of claim 1 , further comprising a layer of an anti-microbial material adjacent said diffusion layer.
7. The delivery device of claim 6 , wherein said anti-microbial material is a silver ion material.
8. The delivery device of claim 6 , wherein said second fluid impermeable layer is between said diffusion layer and said anti-microbial layer.
9. The delivery device of claim 6 , wherein said anti-microbial layer defines an outer surface of said delivery device.