Safety needle with positive flush
First Claim
1. A safety needle assembly for use with a subcutaneously implanted vascular access port, comprising:
- a needle having a proximal end and a distal end;
a body attached to and in fluid communication with the proximal end of the needle; and
a base attached to the body;
wherein movement of the needle assembly from an insertion position to a protection position expunges fluid from the body through the distal end of the needle, creating a positive flush.
1 Assignment
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Accused Products
Abstract
A safety needle device and positive flush mechanism for use with a vascular access port. In one embodiment, the combination needle assembly includes a needle, a body and a base, the body being collapsible to expunge fluid therefrom as the needle is withdrawn from a vascular access port. In another embodiment, the combination needle assembly includes a needle, a housing and a reservoir, the housing squeezing the reservoir to expunge fluid therefrom as the needle is withdrawn from the port. In another embodiment, the needle assembly includes a compression plate and balloon extension, the compression plate forcing fluid out of the balloon extension as the needle is withdrawn from the port. In all embodiments, the needle assembly is configured to provide a positive flush to overcome negative pressures in the vascular access port, while also providing a locking mechanism to prevent accidental needle sticks.
277 Citations
17 Claims
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1. A safety needle assembly for use with a subcutaneously implanted vascular access port, comprising:
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a needle having a proximal end and a distal end; a body attached to and in fluid communication with the proximal end of the needle; and a base attached to the body; wherein movement of the needle assembly from an insertion position to a protection position expunges fluid from the body through the distal end of the needle, creating a positive flush. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification