Medical probe
First Claim
1. A probe for accessing the interior of a volume having an exterior surface of elastic, puncturable material, comprising:
- a hollow shank having a nose portion at the distal end, said nose portion having a bottom portion defining a puncturing tip of said probe, and sidewalls extending rearwardly and upwardly from said puncturing tip and defining at least one aperture into said hollow shank;
said aperture being inclined relative to the central axis of said hollow shank; and
a non-cutting displacement surface, bridging said shank and said bottom portion, extending from the rearward portion of said aperture along a smoothly inflected path and terminating substantially tangentially at said puncturing tip for displacing and stretching said elastic, puncturable material about the outer periphery of said shank as the nose portion penetrates the puncturable material.
6 Assignments
0 Petitions
Accused Products
Abstract
A needle type probe having a displacement surface acting as a bridge which extends across the aperture into the lumen of the needle. The displacement surface defines two approximately equal lateral openings on either side of the bridge and acts to displace and stretch the skin about the needle shank. A holder for the needle type probe is provided which comprises a sleeve which is pushed over the shank of the needle with a force fit, the sleeve having a stopper portion at the end towards the needle point and a holder plate rotatably mounted on the sleeve by means of a collar which is fit over the sleeve. The stopper portion and the front edge of the holder plate collar each have a serrated surface for selectively restricting rotational movement of the collar relative to the sleeve and needle shank. There is further provided a method for making a needle type probe of the instant invention wherein a point wise force is exerted on a tubular needle material at its front edge and the end of the tube is collapsed onto itself until contact is made between radially opposite inner portions of the inner surface of the needle shank. The shank is then ground rearwardly from the contact point to form a bridge extending from the needle point rearwardly with openings on either side of the bridge.
98 Citations
20 Claims
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1. A probe for accessing the interior of a volume having an exterior surface of elastic, puncturable material, comprising:
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a hollow shank having a nose portion at the distal end, said nose portion having a bottom portion defining a puncturing tip of said probe, and sidewalls extending rearwardly and upwardly from said puncturing tip and defining at least one aperture into said hollow shank;
said aperture being inclined relative to the central axis of said hollow shank; anda non-cutting displacement surface, bridging said shank and said bottom portion, extending from the rearward portion of said aperture along a smoothly inflected path and terminating substantially tangentially at said puncturing tip for displacing and stretching said elastic, puncturable material about the outer periphery of said shank as the nose portion penetrates the puncturable material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A venipuncture needle for withdrawing blood from a blood vessel of a patient, comprising:
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a hollow tubular shank having a nose portion at the distal end, said nose portion having a bottom portion defining a puncturing tip of said needle, said puncturing tip having beveled ground edges extending rearwardly and outwardly from opposite sides of said puncturing tip and terminating at beveled sidewalls extending rearwardly and upwardly to form an aperture into the hollow lumen of said needle, said aperture being inclined relative to the longitudinal axis of said needle shank; and a non-cutting displacement surface forming a bridge over said inclined aperture to split said inclined aperture into first and second lateral openings, said displacement surface extending forwardly and downwardly from the rearwardmost end of said inclined aperture along a smoothly inflected path and terminating substantially tangentially to said ground edges of said puncturing tip, said displacement surface acting to displace and stretch the skin and said blood vessel about the tubular shank of said needle as said puncturing tip penetrates the punctured skin and the blood vessel of the patient. - View Dependent Claims (12, 13)
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14. A holder for a venipuncture needle, said needle having a hollow tubular shank, comprising:
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a tubular sleeve dimensioned to snugly fit over the proximate end of said tubular shank;
said sleeve having a stopper portion configured with an external diameter larger than the remainder of said sleeve, the upper edge portion of said stopper having a serrated surface; anda tubular collar configured to rotatably fit over said sleeve, said collar having a holder plate extending radially from said collar for gripping to rotatably adjust said needle, and the front edge portion of said collar has a serrated surface for engaging said serrated surface of said upper edge of said stop portion of said sleeve for selectively restricting rotation of said collar relative to said sleeve and said needle shank when said needle is inserted through a patient'"'"'s skin. - View Dependent Claims (15, 16)
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17. A method for manufacturing a venipuncture needle having a displacement surface bridging the opening into the lumen of the needle, comprising the steps of:
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forcing a point on the interior surface of a tubular, hollow shank section into contact with the radially opposite interior surface of said shank section to thereby create a substantially V-shaped channel on the outer periphery of said shank section; grinding said tubular, hollow shank section rearwardly from the contact point of said interior surface and said radially opposite interior surface of said shank to form a pair of inclined, lateral apertures from said openings and a non-cutting smoothly inflected displacement surface from said V-shaped channel, said displacement surface extending rearwardly from said contact point. - View Dependent Claims (18, 19, 20)
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Specification