Set with angled needle

• US 6,530,911 B1
• Filed: 06/28/2000
• Issued: 03/11/2003
• Est. Priority Date: 07/15/1998
• Status: Expired due to Fees

• Current Assignee: DSU Medical Corporation
• Original Assignee: DSU Medical Corporation
• Inventors: Utterberg, David S.
• Primary Examiner(s): Casler, Brian L.
• Assistant Examiner(s): Sirmons, Kevin C.
• Application Number:
  US09/606,578
• Time in Patent Office: 986 Days
• Field of Search: 604/506, 604/890.1, 604/164.01, 604/165.05, 604/164.09, 604/164.1, 604/164.11, 604/167.02, 604/93.01, 604/502, 604/507, 604/266, 604/267, 604/268
• US Class Current: 604/506
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/3216 Caps placed transversally onto the needle, e.g. pivotally attached to the needle base

Abstract

A cannula or needle set for fluid flow connection with the vascular system of a patient. In one embodiment, the set comprises a hollow, hypodermic needle having a longitudinal axis and a sharp end for skin penetration and connection with the vascular system. A hollow hub carries the needle at a needle opposite to the sharp end. A fluid flow port is defined in the hub at a position laterally spaced from the axis of the needle. An injection site aperture is defined in the hub at a position centrally intersected by the needle axis, the injection site aperture being closed by a recloseable, needle-penetrable wall.

Claims

1. The method of providing fluid flow connection with the vacular system of a patient, which method comprises:

inserting a hollow cannula connected to a hollow hub through the skin into connection with a catheter which communicates with the vascular system of a patient;

inserting a hollow tubular tip of a suction unit through a recloseable, needle penetrable wall of said hub in a direction substantially coaxial with said cannula, and exerting suction to remove a length of clotted blood from the implanted catheter, through the cannula, the hub, and into said suction unit, whereby said clotted blood can be removed with less extraction of whole blood from the body when compared with the use of a conventional fistula set, said hollow hub defining a fluid flow port surrounded by a sleeve which is an integral part of said hub and which connects to a length of flexible tubing, said sleeve extending transversely to the longitudinal axis of the cannula.

2. The method of claim 1 in which said cannula is a needle, which is thereafter withdrawn from penetration of the skin and its connection with the implanted catheter, and needle point shielding apparatus is applied to said needle to protect users and handlers against accidental needle stick.

3. The method of claim 1 in which said suction unit is a syringe and said hollow tubular tip comprises an attached needle or blunt tube.

4. The method of claim 1 said flexible tubing is spaced from said catheter and positioned outside of the skin of the patient.

5. The method of providing fluid flow connection with the vascular system of a patient, which method comprises:

inserting a hollow cannula connected to a hollow hub into connection with a catheter which is implanted in the patient and communicates with the vascular system of the patient;

inserting a hollow tubular tip of a suction unit through a recloseable, needle penetrable wall of said hub in a direction substantially coaxial with said cannula, and exerting suction to remove a length of clotted blood from the implanted catheter into said suction unit, in which said hollow hub is connected in flow relation to a length of flexible tubing which connects to said hub in a direction transverse to the longitudinal axis of the cannula wherein said flexible tubing is spaced from said catheter and positioned outside of the skin of the patient.

6. The method of claim 5 in which said hollow hub defines a fluid flow port surrounded by a sleeve which is an integral part of said hub and which connects to said length of flexible tubing, said sleeve extending transversely to the longitudinal axis of the cannula.

7. The method of claim 5 in which said suction unit is a syringe, and said hollow tubular tip comprises an attached needle or blunt tube.

8. The method of claim 5 in which, thereafter, blood is passed through said catheter and said flexible tubing.

9. The method of providing fluid flow connection with the vascular system of a patient, which method comprises:

inserting a hollow cannula connected to a hollow hub into connection with a catheter which is implanted in the patient and communicates with the vascular system of the patient;

inserting a hollow tubular tip of a suction unit through a recloseable, needle penetrable wall of said hub in a direction substantially coaxial with said cannula, and exerting suction to remove a length of clotted blood from the implanted catheter into said suction unit, in which said hollow hub is connected in flow relation to a length of flexible tubing which connects to said hub in a direction transverse to the longitudinal axis of said cannula, said suction unit comprising a syringe, said hollow, tubular tip comprising an attached needle or blunt tube.

10. The method of claim 9 in which said hollow hub defines a fluid flow port surrounded by a sleeve which is an integral part of said hub, and which connects to said length of flexible tubing, said sleeve extending transversely to the longitudinal axis of the cannula.

11. The method of claim 9 in which said flexible tubing is spaced from said catheter and positioned outside of the skin of the patient.