Cannula assembly
AssigneeAktiebolaget Stille-Werner
InventorBjorn Ulinder
Life of this patent
Estimating the term…
Abstract
A cannula is provided for administration of a fluid from two separate sources of supply, such as from an infusion fluid container and an injection syringe, comprising, in combination, a housing, a fluid flow passage therethrough having two fluid inlets and one fluid outlet, one of the fluid inlets being shaped to receive delivery means of an injection device for delivery of fluid to the cannula fluid flow passage, and having a check valve therein compelling flow therethrough only in the inward direction, and means in the one inlet positioned to accept any impact of the delivery means when inserted in the one inlet, and inhibit impact injury to the check valve upon such insertion.
Claims10
A cannula for administration of two fluids from two separate sources of fluid supply comprising, in combination, a housing;
- a fluid flow passage therethrough having first and second fluid inlets and one fluid outlet, at least one of the fluid inlets being socket-shaped and having an opening leading thereinto, side walls, and an end wall in alignment with the opening, to receive therewithin needle delivery means of a needle-tipped syringe for delivery of one of the fluids to the cannula fluid flow passage;
- and of a short enough depth so that the needle delivery means can impact against an end wall of the socket;
- an opening through a side wall of the one fluid inlet;
- and a check valve on the other side of the socket side wall and extending across the opening in the side wall, compelling flow therethrough only in the inward direction;
- the end wall of the one fluid inlet being in alignment with the socket opening accepting any impact of the delivery means when inserted in the socket opening and inhibiting impact injury to the check valve upon such insertion.
Dependencies are inferred from the claim text.