Needle for invasive medical use and needle assembly
First Claim
1. A needle for invasive medical use, comprising:
- a needle shaft defining a longitudinal axis and having an outermost surface area, a tissue piercing pointed end, a lumen, and an opposed hub end;
a flexible joint with a notch extending through the outermost surface area of the shaft proximate the pointed end, wherein the notch is in fluid communication with the lumen;
a displacement sensor associated with the notch for detecting and signaling a displacement of the shaft end relative to a remainder of the shaft resulted from a force applied to the shaft pointed end when the pointed end is moved into contact with body tissue; and
a signal conductor to transmit detected signals from the displacement sensor.
1 Assignment
0 Petitions
Accused Products
Abstract
A needle for invasive medical use includes a long extended cylindrical needle shaft having an axis and an outer surface area, with a short shaft end at a first end of the shaft with a beveled tip with a pointed end, and a needle hub attached to a second end of the shaft including a device to indicate the location of the shaft end during use inside a body. The needle has a flexible joint with a notch within the shaft at the beginning of the shaft end. The device is a displacement sensor for detecting a displacement of the shaft end relative to the rest of the shaft resulted from a force applied to the shaft end when the needle hub is moved and a signal conductor to transmit the detected signals. The invention further describes a needle assembly comprising such a needle and a syringe attached to said needle hub, whereas an evaluation unit is connected to the signal conductor.
11 Citations
20 Claims
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1. A needle for invasive medical use, comprising:
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a needle shaft defining a longitudinal axis and having an outermost surface area, a tissue piercing pointed end, a lumen, and an opposed hub end; a flexible joint with a notch extending through the outermost surface area of the shaft proximate the pointed end, wherein the notch is in fluid communication with the lumen; a displacement sensor associated with the notch for detecting and signaling a displacement of the shaft end relative to a remainder of the shaft resulted from a force applied to the shaft pointed end when the pointed end is moved into contact with body tissue; and a signal conductor to transmit detected signals from the displacement sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An injection needle for invasive medical use, comprising:
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a needle shaft having a distal end forming a tissue piercing beveled end and a proximate end having a hub; a flexible joint with a notch forming a gap within the needle shaft, the gap positioned a distance away from the beveled tip not more than the diameter of the shaft; a displacement sensor associated with the notch for detecting and signaling a displacement of the beveled end relative to the rest of the shaft resulting from a force applied to the beveled end when the beveled end is moved into contact with body tissue; and a signal conductor to transmit detected signals from the displacement sensor.
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20. An injection needle for invasive medical use, comprising:
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a needle shaft having a hollow body with opposed distal and proximal ends and a lumen, the distal end forming a tissue piercing beveled end, and the proximate end having a hub; a notch extending through an outermost exterior surface of the body towards a central axis of the body, the notch in fluid communication with the lumen, the notch positioned adjacent the beveled end whereby the beveled end is displaceable relative to a remainder of the body by flexible bending of the body at the notch when the beveled end is pressed against body tissue; a displacement sensor associated with the notch to detect and signal a displacement of the beveled end relative to the remainder of the body; and a signal conductor extending away from the notch to transmit detected signals from the displacement sensor exterior to the body when the beveled end is pressed against body tissue inside the body.
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Specification