Indwelling venous cannula
AssigneeArrabona Medical KFT
InventorIngolf Max Wechler
Life of this patent
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Abstract
An infusion apparatus including an indwelling venous cannula with a catheter holder, a plastic catheter and a steel cannula holder with a steel cannula extending through the plastic catheter and the catheter holder, a tubular valve body made of elastomeric plastic with certain length L being disposed in a channel extending centrally through the housing of the catheter holder, and the walls of the valve body lying on and directly touching each other over certain length L, whereby certain length L, the wall thickness and the Shore hardness of the valve body are coordinated with each other so that an infusion solution can pass the valve under the effect of gravity but a reflux of the patient's blood is reliably prevented. The valve body is preferably a tubular film.
Claims14
An infusion apparatus comprising an indwelling venous cannula with a catheter holder (3), a plastic catheter (8) and a steel cannula holder (2) with a steel cannula (6) extending through the plastic catheter (8) and the catheter holder (3), a tubular valve body (14, 15) made of elastomeric plastic with certain length L being disposed in a channel (12) extending centrally through the housing of the catheter holder (3), and the walls of the valve body (14, 15) lying on and directly touching each other over certain length L, whereby certain length L, the wall thickness and the Shore hardness of the valve body (5) are coordinated with each other so that an infusion solution can pass the valve under the effect of gravity but a reflux of the patient's blood is reliably prevented.
An infusion apparatus comprising an indwelling venous cannula with a catheter holder (3), a plastic catheter (8) and a steel cannula holder (2), a self-supporting sheathlike valve body (5) made of elastomeric plastic being inserted sealingly in a channel (12) extending centrally through the housing of the catheter holder (3), said valve body having at the patient-side end an end cap (16a) having at least one slot, the wall thickness, Shore hardness and axial length of the slots being coordinated with each other such that an infusion solution can pass the valve under the effect of gravity but a reflux of the patient's blood is reliably prevented.
Dependencies are inferred from the claim text.