US 2023/0053587 A1 · A MICRONEEDLE AND A FLUID CHANNEL SYSTEM FOR COLLECTING FLUID

Abstract

Microneedle (100, 200, 300, 720) comprising an elongated body (110, 210, 310) extending along a longitudinal axis from a top end to a bottom end on a substrate (300, 710), where the elongated body comprises an upper portion (120, 220, 320) and a lower portion (130, 230, 330). The lower portion (130, 230, 330) comprises an internal capillary bore hole (260, 730) extending into the substrate (300, 710). The upper portion (120, 220, 320) of the elongated body (110, 210, 310) has a semi-enclosed internal void space (140, 240) formed by at least three body sides whereof two body sides join at a sharp edge and a third body side is provided with an opening slit (150, 250, 350) extending from the lower portion (130, 230, 330) of the elongated body (110, 210, 310) to the upper end of the third body side. The top end of the elongated body (110, 210, 310) is configured as a bevel to create a sharp tip at the top of said edge, said bevel extending to the third body side. The semi-enclosed internal void space (140, 240) of the upper portion opening to the internal capillary bore hole of the bottom end of the elongated body (110, 210, 310), and the bottom end of the elongated body is connected to the substrate (300, 710).

Claims23

Dependent claims

A microneedle provided on a substrate, comprising:

an elongated body extending along a longitudinal axis from a top end to a bottom end on the substrate, wherein:
the elongated body comprises an upper portion and a lower portion;
the lower portion of the elongated body comprises an internal capillary bore hole extending into the substrate;
the upper portion of the elongated body has a semi-enclosed internal void space formed by at least three body sides whereof two body sides join at a sharp edge and a third body side is provided with an opening slit extending from the lower portion of the elongated body to the upper end of the third body side;
the top end of the elongated body is configured as a bevel to create a sharp tip at the top of said edge, said bevel extending to the third body side;
the semi-enclosed internal void space of the upper portion of the elongated body opening to the internal capillary bore hole of the bottom end of the elongated body;
and
the bottom end of the elongated body is connected to the substrate.

5 more elements

A fluid channel system for transporting fluid from a plurality of inlets to a fluid collection area via a fluid channel, the fluid channel system comprising the fluid collection area and at least one sector, wherein each sector comprises a first section and a second section, wherein in each sector the first section comprises at least two inlet channels each connecting an inlet and the second section, wherein in each sector the second section connects the at least two inlet channels of the first section and the fluid collection area via a connective channel, wherein in each sector the at least two inlet channels merge into the connective channel;

wherein
each sector comprises at least one first droplet formation structure between the at least two inlets channels, wherein the at least one first droplet formation structure is arranged to collect fluid by reducing the fluid interface area to air and enlarge the fluid interface area to the channel wall via channel wall geometry, moving from one inlet channel towards another inlet channel than the one inlet channel;
each connective channel comprises a second droplet formation structure, wherein the second droplet formation structure is arranged at the end of the connective channel providing an outlet to the fluid collection area and the second droplet formation structure is arranged to collect fluid moving from at least one connective channel;
and
wherein the fluid channel is defined at least by the at least two inlet channels and the at least one connective channel.

2 more elements

Dependencies are inferred from the claim text.

A microneedle and a fluid channel system for collecting fluid

Life of this patent

A microneedle and a fluid channel system for collecting fluid

Life of this patent

Abstract

Claims23