Abstract: Filter needle comprising a hub having a proximal end arranged for removable connection to a syringe body, and having a distal end in which a needle is mounted, the hub provided with a channel between the proximal end and the distal end, for when the syringe body is connected, establishing a fluid connection between the syringe body and the needle, wherein a filter unit is mounted in the channel of the hub.

Abstract: Some embodiments are directed to a needle assembly including at least N injection needles where N is at least four and a multiple of two. The needle assembly also includes a first liquid port adapted to be connected to an injection device, and N second liquid ports connected to one of the N injection needles. N/2 main liquid pathways each have an entrance connected to the first liquid port and an exit, further including N/2 secondary liquid pathways that have two extremities each opening on one of the N second liquid ports, and a mid portion connected to the exit of one of the main liquid pathways. The main liquid pathways and the secondary liquid pathways define N liquid flow paths between the first liquid port and the N second liquid ports dimensioned so a pressure drop between them is similar.

Abstract: Some embodiments are directed to a needle assembly including at least N injection needles where N is at least four and a multiple of two. The needle assembly also includes a first liquid port adapted to be connected to an injection device, and N second liquid ports connected to one of the N injection needles. N/2 main liquid pathways each have an entrance connected to the first liquid port and an exit, further including N/2 secondary liquid pathways that have two extremities each opening on one of the N second liquid ports, and a mid portion connected to the exit of one of the main liquid pathways. The main liquid pathways and the secondary liquid pathways define N liquid flow paths between the first liquid port and the N second liquid ports dimensioned so a pressure drop between them is similar.