Miniature Fixed and Adjustable Flow Restrictor for the Body

    公开(公告)号:US20230069775A1

    公开(公告)日:2023-03-02

    申请号:US17984046

    申请日:2022-11-09

    Abstract: A microfluidic flow restrictor that uses micron-sized beads to impede flow is described. The flow rate can be adjusted by adding or removing the beads using injection needles through self-sealing ports, one injection needle injecting or aspirating beads and another injection needle pushing or pulling fluid from outside of a bead trap within the flow restrictor. In alternative embodiments, the beads or other filler material can be trapped in a manifold bead trap such that they block a subset of fluid channels of the flow restrictor, allowing fluid to flow freely through the rest of the fluid channels. The flow restrictor can be integrated with a contact lens or implantable medical device for use in dispensing liquid therapeutic agents at flow rates of microliters per minute or moving body fluids at a controlled rate from one part of the body to another.

    Reliable deposition of thin parylene

    公开(公告)号:US11077462B2

    公开(公告)日:2021-08-03

    申请号:US15331544

    申请日:2016-10-21

    Abstract: Apparatus, system, and method of depositing thin and ultra-thin parylene are described. In an example, a core deposition chamber is used. The core deposition chamber includes a base and a rigid, removable cover configured to mate and seal with the base to create the core deposition chamber and to define an inside and an outside of the core deposition chamber. The core deposition chamber also includes a conduit through a top of the cover. The conduit has a lumen connecting the inside to the outside of the core deposition chamber. The lumen has a length and a cross-section. The cross-section has a width between 50 μm and 6000 μm. The length is less than 140 times the cross-section width. The core deposition chamber can be placed in an outer deposition chamber and can achieve parylene deposition less than 1 μm thick inside the core deposition chamber.

    Eye treatment device having a ring like shape

    公开(公告)号:US11051977B2

    公开(公告)日:2021-07-06

    申请号:US16437388

    申请日:2019-06-11

    Abstract: An eye treatment apparatus is described. The apparatus includes an annular body that has a hollow optical zone in its center. An inner perimeter of the annular body surrounds the optical zone. The inner perimeter has a diameter that corresponds to a diameter of the eye's cornea. An outer perimeter of the annular body has a diameter such that the annular body can extend to underneath the eye lid in an open eye position when the eye treatment apparatus is in operation. In this way, the apparatus can be worn on the eye, where the hollow optical zone substantially corresponds to the cornea and does not interfere with the field of vision. The annular body also includes a storage chamber that stores therapeutic liquid for an eye. An outlet is coupled with the storage chamber such that, in operation, the therapeutic liquid can be dispensed to the eye.

    Radioluminescent phototherapy eye device

    公开(公告)号:US10512534B2

    公开(公告)日:2019-12-24

    申请号:US15722751

    申请日:2017-10-02

    Abstract: Embodiments of the present disclosure are directed to a phototherapy eye device. In an example, the phototherapy eye device includes a number of radioluminescent light sources and an anchor. Each radioluminescent light source includes an interior chamber coated with phosphor material, such as zinc sulfide, and containing a radioisotope material, such as gaseous tritium. The volume, shape, phosphor material, and radioisotope material are selected for emission of light at a particular wavelength and delivering a particular irradiance on the retina (when implanted in an eyeball). The wavelength is in the range of 400 to 600 nm and the irradiance is substantially 109 to 1011 photons per second per cm2.

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