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
0 Petitions
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assembly includes a needle, a body and a base, the body being collapsible to expunge fluid therefrom as the needle is withdrawn from a vascular access port.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a needle, a housing and a reservoir, the housing squeezing the reservoir to expunge fluid therefrom as the needle is withdrawn from the port.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plate and balloon extension, the compression plate forcing fluid out of the balloon extension as the needle is withdrawn from the port.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.
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Citations
58 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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18. A needle device 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 housing attached to said proximal end of said needle, comprising a lower portion and an upper portion, said lower portion being movable from an insertion position to a protection position, said upper portion being graspable to facilitate positioning of said needle device; and
a collapsible reservoir disposed between said upper and lower portions of said housing and in fluid communication with said fluid flow path of said needle. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A safety needle assembly, comprising:
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a needle having a proximal end and a distal end;
a compressible member connected to a proximal end of said needle and in fluid communication therewith;
a base having an opening for receiving said needle;
a body surrounding said compressible member and movable with respect to said base;
wherein movement of said needle assembly from an insertion position to a protection position expunges fluid from the compressible member through the distal end of the needle, creating a positive flush. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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57. A method of supplying fluid to a vascular access port, comprising:
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providing a needle assembly comprising a needle and a positive flushing mechanism;
inserting said needle into said vascular access port;
delivering fluid to said vascular access port;
removing said needle from said vascular access port;
wherein said positive flushing mechanism is engaged, sending a volume of fluid through said needle before said needle completely exits said port.
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58. A method for preventing a negative pressure within a vascular access port upon removal of a needle therefrom, comprising:
activating a positive flushing mechanism comprising a fluid-holding member, wherein a volume of fluid is simultaneously released from said member through a needle tip of said needle when said needle tip is withdrawn from said vascular access port.
Specification