Multiple needle injector
First Claim
Patent Images
1. A fluid injection device comprising:
- a plurality of needles;
a hub having a first end portion, a second end portion, a plurality of needle bases at the second end portion, and a directing cone extending from the second end portion with the plurality of needle bases at least partially surrounding the directing cone, the directing cone tapering to a non-frustoconical tip in a direction away from the first end portion for diverting flow toward the plurality of needle bases, each of said plurality of needles being in fluid communication with a respective one of the plurality of needle bases and projecting from said first end portion of the hub; and
a base component, separate from and couplable to a second end portion of the hub, the non-frustoconical tip extending into a cavity of the base component, upstream of the plurality of needle bases, the base component comprising an inlet configured to receive tubing therein for connecting the device to a fluid source.
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Abstract
An improved injector needle apparatus is described with inherent properties for increasing linear flow rates when inserted into a subcutaneous port during tissue expansion thus decreasing procedure time.
434 Citations
29 Claims
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1. A fluid injection device comprising:
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a plurality of needles; a hub having a first end portion, a second end portion, a plurality of needle bases at the second end portion, and a directing cone extending from the second end portion with the plurality of needle bases at least partially surrounding the directing cone, the directing cone tapering to a non-frustoconical tip in a direction away from the first end portion for diverting flow toward the plurality of needle bases, each of said plurality of needles being in fluid communication with a respective one of the plurality of needle bases and projecting from said first end portion of the hub; and a base component, separate from and couplable to a second end portion of the hub, the non-frustoconical tip extending into a cavity of the base component, upstream of the plurality of needle bases, the base component comprising an inlet configured to receive tubing therein for connecting the device to a fluid source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19, 20, 24, 25)
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- 13. A fluid injection device comprising a hub and a base component, the hub having a first end portion, a second end portion, and a plurality of needle bases formed along said second end portion, said first end portion is configured to receive a plurality of needles to permit the plurality of needles to project from said first end portion of the hub, each of the plurality of needles being in fluid communication with a respective needle base, the hub further comprising a directing surface (i) being angled toward the needle bases and (ii) having a tapered shape that terminates in a non-frustoconical tip, the needle bases being arranged around the directing surface to promote laminar flow of a fluid along the directing surface toward the needle bases, the base component, separate from and couplable to a second end portion of the hub, the non-frustoconical tip extending into a cavity of the base component, upstream of the plurality of needle bases, the base component comprising an inlet configured to receive tubing therein for connecting the device to a fluid source.
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14. A method of increasing fluid flow into an injection port of a tissue expander comprising the steps of:
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a. providing a hub and a base component coupled to a tubing attached to a fluid source, wherein said hub has a first end portion from which a plurality of needles project outward and a second end portion configured to receive fluid from the tubing, each of the plurality of needles being in fluid communication with a needle base formed along said second end portion, the hub further comprising a directing surface (i) being angled toward and at least partially surrounded by the needle bases and (ii) having a tapered shape that terminates in a non-frustoconical tip to promote laminar flow of a fluid toward the needle bases, the base component being separate from and couplable to a second end portion of the hub, the non-frustoconical tip extending into a cavity of the base component, upstream of the plurality of needle bases, the base component comprising an inlet configured to receive the tubing therein for connecting the hub to the fluid source; and b. pushing fluid through said tubing such that said fluid passes through the hub and into each of the plurality of needles. - View Dependent Claims (15, 28, 29)
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- 21. A multiple injector apparatus comprising a hub, a plurality of needle bases in the hub, a plurality of needles coupled to the hub and in fluid communication with the plurality of needle bases, a solid-core directing cone extending from the hub and tapering in direction away from the plurality of needle bases to a non-frustoconical tip for diverting flow toward the plurality of needle bases, and a base component, separate from and couplable to a second end portion of the hub, the non-frustoconical tip extending into a cavity of the base component, upstream of the plurality of needle bases, the base component comprising an inlet configured to receive tubing therein for connecting the apparatus to a fluid source.
Specification