Protected cannula

Abstract

A protective device for enclosing the scarf of a cannula carried by a boss while permitting access to the said scarf by a port of a Y-site which is located into proximity to an adjoining length of flexible tubing forming part of an intravenous administration set. The protective device has a cylindrical sheath portion surrounding the cannula, the ends of the cylindrical portion having at least one cutout which snugly receives the flexible tubing.

I claim: 
     
       1. The combination of an intravenous administration set having a Y-site, a first tubing extending therefrom and adapted to connect to a patient-indwelling terminus, a second length of tubing extending from said Y-site with a terminal means adapted to be connected to a first source of intravenous solution, said Y-site having an inlet port, a hypodermic syringe adapted to hold a second intravenous solution, the syringe .[.having a cannula with a scarf at one end, said cannula being carried by a boss spaced from the scarf;.]. .Iadd.including an elongated barrel with a boss at one end and plunger extending from the other end to bolus said second solution out of the barrel through the boss, .Iaddend.and .[.a.]. .Iadd.an elongated and generally cylindrical .Iaddend.protective .[.device.]. .Iadd.sheath .Iaddend.carried by .Iadd.and removable from .Iaddend.said hypodermic syringe .[.and positioned around said cannula, said.]..Iadd.; an elongated .Iaddend.cannula .[.connecting.]. .Iadd.having a first end adapted to connect with .Iaddend.the interior of the .Iadd.barrel of the .Iaddend.hypodermic syringe; .Iadd.a scarf at the other end of the cannula adapted to connect .Iaddend.with the tubing leading to the patient indwelling terminus; .[.said protective device having a.]. .Iadd.the .Iaddend.generally cylindrical sheath .[.portion.]. having a first open end and surrounding said cannula over its length and extending beyond the scarf end of said cannula at the first open end of said sheath, .[.said sheath being affixed at its other end to said boss, said cylindrical portion.]. .Iadd.the first end of the sheath .Iaddend.having at least one cutout .[.at said first open end which snugly receives.]. .Iadd.extending toward a second end of the sheath.Iaddend., .Iadd.the cutout being adapted to receive .Iaddend.by lateral reception.[.,.]. one of the tubings of said intravenous administration set, while said scarf has punctured the said inlet port of said Y-site; whereby the user, in making said combination, is protected by the sheath of said protective device from inadvertent puncture of the hands and fingers by said .[.scarf..]. .Iadd.scarf; the second open end of the sheath having a socket with an internal opening less than that of the first open end of the sheath to be adapted to make a slip fit over the boss of the hypodermic syringe. .Iaddend. 
     
     
       2. The combination of claim 1 wherein said cylindrical portion of said protective device has diametrically disposed cutouts, each adapted to snugly receive, by lateral reception, one of the tubings of the intravenous administration set while said scarf has punctured the said inlet port. 
     
     
       3. The combination of an intravenous administration set having a Y-site, a first tubing extending therefrom and adapted to be connected to a patient-indwelling terminus, a second length of tubing extending from said Y-site with a terminal means adapted to be connected to a first container of intravenous solution, said Y-site having an inlet port; and a protective device including a boss carrying a cannula with a scarf at one end spaced from the boss, said cannula being adapted to connect the contents of a second intravenous solution container with the tubing leading to the patient-indwelling terminus, said protective device having a generally cylindrical sheath portion having a first open end and surrounding the cannula over its length and extending beyond the scarf end of the cannula at the first open end of said sheath, said sheath being affixed at its other end to said boss, said cylindrical portion having at least one cutout at said open end which snugly receives, by lateral reception, one of the tubings of the intravenous administration set, while said scarf has punctured the said inlet port, whereby the user, in making said combination, is protected by said cylindrical portion from inadvertent puncture of the hands and fingers by said scarf. 
     
     
       4. The combination of claim 3 wherein said cylindrical portion of said protective device has diametrically disposed cutout, each adapted to snugly receive, by lateral reception, one of the tubings of the intravenous administration set while said scarf has punctured the said inlet port. .Iadd. 
     
     
       5.  The combination of an intravenous administration set using first and second containers of first and second intravenous solutions, respectively, in a piggy back arrangement for infusing said solutions into a patient through a Y-site, a first tubing extending from the Y-site and adapted to be connected to a patient-indwelling terminus, a second tubing extending from said Y-site with a terminal means adapted to be connected to a first container of intravenous solution, said Y-site having an inlet port with a puncturable closure; and a protective device including a boss carrying a cannula with a scarf at one end spaced from the boss, said cannula being adapted to connect to a third tubing connected to the contents of a second intravenous solution container, and thus connect those contents with the tubing leading to the patient-indwelling terminus, said protective device having a generally cylindrical sheath portion having a first open end and surrounding the cannula and extending beyond the scarf end of the cannula at the first open end of said sheath, said sheath being affixed at its other end to said boss, said cylindrical portion having at least one cutout at said open end which receives the third tubing of the intravenous administration set, while said scarf has punctured the closure of the inlet port, whereby the user, in making said combination, is protected by said cylindrical portion from inadvertent puncture of the hands and fingers by said scarf. .Iaddend. .Iadd.6. The combination of an intravenous administration set using first and second containers of first and second intravenous solutions, respectively, in a piggy back arrangement for infusing said solutions into a patient through a Y-site, a first tubing extending from the Y-site and adapted to be connected to a patient-indwelling terminus, a second tubing extending from said Y-site with a terminal means adapted to be connected to the first container of intravenous solution, said Y-site having an inlet port with a puncturable closure; and a protective device including a boss carrying a cannula with a scarf at one end spaced from the boss, said cannula being adapted to connect to a third tubing to the contents of the second intravenous solution container, and thus connect those contents with the first tubing leading to the patient-indwelling terminus, said protective device having an elongated and generally cylindrical sheath portion having a first open end and surrounding the cannula and extending beyond the scarf end of the cannula at the first open end of said sheath, the sheath portion being affixed at its other end to said boss, the cylindrical sheath portion having at least one cutout at said open end which receives the third tube of the intravenous administration set while said scarf has punctured the closure of the inlet port, whereby the user, in making said combination, is protected by said cylindrical portion from inadvertent puncture of the hands and fingers by said scarf; the other end of the sheath portion being open and having a socket with an internal opening smaller than that of the first open end of the sheath and adapted to make a fluid-tight seal with one end of the third tubing connected at its other end to the second solution container. .Iaddend. .Iadd.7. A protective device for use with an inlet port having an imperforate closure, the device including a boss carrying a cannula with a scarf at one end spaced from the boss, said cannula being adapted to puncture the imperforate closure of the inlet port, said protective device having an elongated and generally cylindrical sheath portion having a first open end surrounding the cannula and extending beyond the scarf end of the cannula at the first open end of said sheath, the sheath portion being affixed to said boss, the cylindrical sheath portion having at least one cutout at said open end which may receive a tube of an intravenous administration set while said scarf punctures the closure of the said inlet port, whereby the user is protected by said cylindrical portion from inadvertent puncture of the hands and fingers by said scarf; the other end of the sheath portion being open and having a socket with an internal opening smaller than that of the first open end of the sheath to be adapted to make a fluid-tight seal with a source of medication to be introduced through the cannula to the inlet port. .Iaddend.