Needle for Subcutaneous Port
First Claim
1. A needle for a subcutaneous port adapted to reduce the damage to a biological or physiological fluid at the inlet of the needle, comprising:
- a needle shaft with a bore along a longitudinal axis of the needle shaft and a proximal end and a distal end in opposition thereof;
a pointed tip at the distal end with a pointed end tip for the entry of at least a portion of the needle shaft into a biological or physiological fluid reservoir in the subcutaneous port; and
at least an inlet orifice along the needle shaft between the proximal end and the distal end and in fluidic contact with the biological or physiological fluid reservoir and adjacent to the pointed tip, wherein said inlet orifice communicates with the bore for the passage of the fluid from the biological or physiological fluid reservoir through the inlet orifice and through the bore, and wherein the inlet orifice has at least a rounded edge.
1 Assignment
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Accused Products
Abstract
This disclosure relates to a new type of needed for a subcutaneous port or for any use where blood is recycled, and more precisely to a needle with reduced friction openings for easing blood and its elements along a passageway made of a through bore in the body of a needle. The needle includes an oval shape opening for increased mechanical resistance of the needle while allowing a greater passage curvature of the blood cells at the greatest zone of passage. In other embodiments, a plurality of staggered openings is used to reduce the flow through any single opening where damage occurs, the openings can be made in a curved area, or a plurality of smaller openings or a grid made of openings can be used to further reduce the interference of the needle tip and the needle openings on blood.
51 Citations
21 Claims
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1. A needle for a subcutaneous port adapted to reduce the damage to a biological or physiological fluid at the inlet of the needle, comprising:
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a needle shaft with a bore along a longitudinal axis of the needle shaft and a proximal end and a distal end in opposition thereof; a pointed tip at the distal end with a pointed end tip for the entry of at least a portion of the needle shaft into a biological or physiological fluid reservoir in the subcutaneous port; and at least an inlet orifice along the needle shaft between the proximal end and the distal end and in fluidic contact with the biological or physiological fluid reservoir and adjacent to the pointed tip, wherein said inlet orifice communicates with the bore for the passage of the fluid from the biological or physiological fluid reservoir through the inlet orifice and through the bore, and wherein the inlet orifice has at least a rounded edge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 21)
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17. A method of protecting blood cells from damage during a medical treatment with a subcutaneous port, where blood is circulated through a needle, the method comprising the steps of:
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connecting a needle to a medical treatment device for conducting a treatment using multiple circulation of blood through the needle, the needle having a needle shaft having a bore along a longitudinal axis of the needle shaft and a proximal end and a distal end in opposition thereof, a pointed tip at the distal end with a pointed end tip, and at least an inlet orifice along the needle shaft between the proximal end and the distal end, and wherein the inlet orifice has at least a rounded edge for the protection of blood cells; puncturing a plenum surface of a subcutaneous port for entry of at least a portion of the needle shaft and the inlet orifice into a fluid reservoir in the subcutaneous port; placing the inlet orifice in fluidic contact with blood in the fluid reservoir for the passage of the blood from the fluid reservoir through the inlet orifice and through the bore; and
circulating the blood so the flow of blood circulates around the rounded edge to protect the blood cells during the circulation to the medical treatment device. - View Dependent Claims (18, 19, 20)
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Specification