Device for the metered administration of a fluid drug
First Claim
1. A device for administering in doses, in particular infusing, a medicinal liquid, comprising:
- a) a housing comprising a housing connecting section comprising a proximal end and a distal end, and a container from which the medicinal liquid is displaced through an outlet in doses, to be administered, wherein the housing connecting section connects the outlet to a catheter, the catheter having a front end that is or can be connected to an administering needle, wherein the rear end of the catheter is attached to the proximal end of the housing connecting section, the distal end of the housing connecting section is screwed in or on or fixed with a snap-in lock to an outlet section which extends the outlet, and wherein the proximal end of the housing connecting section and the distal end of the housing connecting section are connected by a thread or a snap-fit connection;
b) a valve positioned in the housing connecting section and arranged in a flow cross-section of the medicinal liquid, and which in order to prevent self-emptying only allows a through-flow towards the end of said catheter when the liquid pressure acting in this direction is greater than a pressure bearing on said valve as a result of the inherent weight of a liquid column in the device, whereinc) the medicinal liquid is displaced through the outlet by advancing a stopper; and
d) the housing connecting section is detachably connected to the outlet and carries a connecting needle such that said connecting needle pierces a membrane sealing the outlet when the housing connecting section is connected.
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Accused Products
Abstract
A device for the metered administration of a fluid drug. The device has a container having a piston for administering the fluid drug through an outlet of the container, a catheter connected to the outlet of the container, the catheter having a front end facing away from the outlet and being connected to an injection needle, and a valve positioned between the outlet and the injection needle in a flow cross section of the fluid drug, the valve having an inlet end adjacent the outlet and an outlet end adjacent the injection needle, wherein the valve permits flow of the fluid drug through the valve from the outlet to the injection needle when a fluid pressure exerted on the inlet end of the valve exceeds a pressure on the inlet end caused by the dead weight of the fluid drug.
101 Citations
12 Claims
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1. A device for administering in doses, in particular infusing, a medicinal liquid, comprising:
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a) a housing comprising a housing connecting section comprising a proximal end and a distal end, and a container from which the medicinal liquid is displaced through an outlet in doses, to be administered, wherein the housing connecting section connects the outlet to a catheter, the catheter having a front end that is or can be connected to an administering needle, wherein the rear end of the catheter is attached to the proximal end of the housing connecting section, the distal end of the housing connecting section is screwed in or on or fixed with a snap-in lock to an outlet section which extends the outlet, and wherein the proximal end of the housing connecting section and the distal end of the housing connecting section are connected by a thread or a snap-fit connection; b) a valve positioned in the housing connecting section and arranged in a flow cross-section of the medicinal liquid, and which in order to prevent self-emptying only allows a through-flow towards the end of said catheter when the liquid pressure acting in this direction is greater than a pressure bearing on said valve as a result of the inherent weight of a liquid column in the device, wherein c) the medicinal liquid is displaced through the outlet by advancing a stopper; and d) the housing connecting section is detachably connected to the outlet and carries a connecting needle such that said connecting needle pierces a membrane sealing the outlet when the housing connecting section is connected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification