Vein visualisation aid device
A visualisation aid device has a flexible PCB with a ring of surface mount LEDs around a circular opening. The LEDs emit at a wavelength to provide vein visualisation through a skin area exposed by the opening in use. A transparent membrane extends across the needle-access opening, and it has an adhesive on its skin-facing distal side. After insertion of the needle with the benefit of visualisation by the LEDs the substrate may be removed leaving only the membrane maintaining a sterile environment around the puncture site and helping to retain the needle in place.
1 . A visualisation device for vein access, the device comprising:
a plurality of surface mounted LED light sources arranged in a pattern on a flexible substrate near an edge of the flexible substrate,
a driver for the light sources,
the flexible substrate including an opening for needle insertion, said opening forming a region in a field of emission of the light sources, and there is a gap in the flexible substrate so that the flexible substrate may be peeled away with a needle in place, and wherein the substrate forms a generally annular shape around the opening and said gap extends radially, and
a transparent membrane extending across the opening of the flexible substrate and said membrane is configured to be punctured by the needle, wherein the membrane has an adhesive layer on a distal skin-facing surface, the adhesive layer allowing the membrane to adhere the membrane to a patient's skin surrounding the needle in use to provide a hygienic environment around a puncture site, and wherein the substrate is peelable from the membrane after the membrane has adhered to the patient's skin, being of elastomeric material,
the driver being removable, in which the device comprises an interface for removable engagement with the driver and the interface and the driver being arranged for physical and electrical engagement to provide drive signals to the substrate, and
the interface includes an electrical lead for separate engagement with the driver.
2 . The visualisation device as claimed in claim 1 , wherein the substrate comprises a flexible PCB.
3 . The visualisation device as claimed in claim 1 , wherein the substrate is mounted on a distal side of a resilient pad.
4 . The visualisation device as claimed in claim 1 , wherein the device comprises an exposed portion of the adhesive layer for adhering to the patient's skin to retain the substrate in place.
5 . The visualisation device as claimed in claim 4 , wherein the adhesive layer extends around the substrate on all sides.
6 . The visualisation device as claimed in claim 5 , wherein the substrate is mounted to a distal side of a resilient pad, and the adhesive layer is secured to a proximal side of the pad and extends laterally from said pad.
7 . The visualisation device as claimed in claim 1 , wherein the device comprises a tear-away bridge for retaining opposed sides of the substrate in close proximity at the gap until the tear-away bridge is removed.
8 . The visualisation device as claimed in claim 1 , wherein the device comprises a resilient pad to which the flexible substrate is secured on a distal side of the pad, and the interface is secured to the pad on a proximal side of the pad.
9 . The visualisation device as claimed in claim 1 , wherein the light sources include LEDs which emit at a wavelength in the range of 620 nm to 670 nm.
10 . The visualisation device as claimed in claim 1 , wherein the device comprises a numbing agent adapted to be released to provide a numbing sensation locally to the patient.
11 . The visualisation device as claimed in claim 10 , wherein the numbing agent comprises a gel capsule, and the agent comprises Lidocaine.
12 . The visualisation device as claimed in claim 1 , further comprising a spacer on a distal side of the flexible substrate to provide a separation of at least some of the light sources from the skin.
13 . The visualisation device of claim 1 , further comprising a spacer on a distal side of the flexible substrate to provide a separation of at least some of the light sources from the skin, and the spacer is of a transparent material.
14 . The visualisation device as claimed in claim 1 , further comprising a transparent barrier over at least some of the light sources on a distal side of said light sources, suitable to reduce heat conduction to the skin in use.
15 . The visualisation device as claimed in claim 1 , further comprising a first package which seals the flexible substrate in a sterile manner, the package comprising a film which is transparent to light source emitted radiation, whereby an initial scan of a region on a body may be performed before removal of the flexible substrate from the package.
16 . The visualisation device as claimed in claim 15 , further comprising an external package containing the first package, the external package having indicia printed for user reading.