×

Surgical needle

  • US 4,645,491 A
  • Filed: 03/06/1985
  • Issued: 02/24/1987
  • Est. Priority Date: 03/09/1984
  • Status: Expired due to Fees
First Claim
Patent Images

1. Apparatus for use in accurately locating a catheter with respect to the outer surface of a patient'"'"'s skin, the apparatus comprising:

  • a hollow surgical needle having an elongate stem portion of uniform inner and outer diameters defining a sharpened leading end and an opening at that end, a window formed through a portion of said stem with means for providing airtight separation between an interior of said stem visible through said window and an exterior of said stem, said window being of sufficient longitudinal extent that a part of this portion will be inserted into the patient'"'"'s skin when the needle is inserted to a required depth;

    a flexible tubular catheter adapted to be slidably inserted in the hollow surgical needle and moveable through the needle to project out beyond said opening in the leading end of the needle, the catheter including a leading end and markings spaced along its length including a first marking which cooperates with said window to indicate alignment of said leading edge of said needle and said leading edge of said catheter;

    whereby said needles can be inserted to a required depth and the leading end of the catheter can be inserted into and through the needle to a desired position with said first marking and said location indicating said alignment and with the markings being visible through the window, the markings being used as a guide to indicate the amount of catheter entered into the needle and so that one of the markings visible through the window can be used as a reference point to permit the catheter to be located in the same position relative to the skin surface after the needle has been removed.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×