Abstract
The existing syringes in use today consist of a single barrel with
only one chamber and one plunger. The "Single Barrel Double Chamber
Syringe" is a modified version of the existing syringe in that
it uses a single barrel syringe separated into two chambers by the
use of a hollow cone shaped floating plunger. The hollow floating
plunger creates two independent chambers capable of delivering two
medications in one motion without mixing of the fluids. The hub of
the syringe has also been modified with a needle that has a sharp
point facing to the inside of the syringe and has a small hole bored
into the side near the base. This will allow the hollow floating plunger
to be pierced once the first chamber is emptied. The hole in the base
of the needle will relieve the pressure in the first chamber after
the needle has passed through the hollow floating plunger while allowing
any remaining fluid to be expelled. Once the first chamber has been
emptied, the second chamber will begin to empty just as the first,
until the manual plunger reaches the hollow floating plunger. The
manual plunger will also be cone shaped so it will fit snugly into
the hollow side of the floating plunger. This will allow as much fluid
as possible in chamber two to be expelled.
Claims
What I claim as my invention is:
1. A syringe, used by paramedics, nurses, and doctors in the medical
field that will allow a medication to be administered with a saline
bolas to flush the medication in one easy push without the risk
of time delay and awkwardness of having to use two syringes that
need to be prepared and administered separately.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0001] These and other features of the present invention will be
more clearly understood from a consideration of the following description,
taken in connection with the accompanying drawing in which:
[0002] FIGS. 1a-1 c illustrate a single barrel double chamber syringe
according to a preferred embodiment of the invention and helpful
in an understanding of its operation; and
[0003] FIGS. 2a-2c are views of several of the component parts
of the syringe of FIGS. 1a-1c, partially in section form, helpful
in an understanding of the two chambered segregated fluid delivery
system.
DETAILED DESCRIPTION OF INVENTION
[0004] Referring to FIGS. 1a-1c, the single barrel double chamber
syringe of the invention is illustrated by the reference numeral
10, having a barrel 1 and plunger 2 by means of which any fluids
within the barrel 1 are forced outwardly through its hollow needle
8. To effectuate this, a push stopper 3 is shown coupled to the
plunger 2. In accordance with the invention, the push stopper 3
is preferably made of a pliable material to maintain a fluid tight
seal around the outer periphery.
[0005] Also shown in FIGS. 1a-1c is a hollow floating plunger 5
within the barrel 1, likewise composed of a pliable material to
maintain a fluid tight seal around the outer periphery, and forming
a first compartment 4 between the stoppers 3, 5 within which any
included fluid or solution becomes separated.
[0006] Additionally, in accordance with the invention, the hollow
floating plunger will be illustrated in FIGS. 2a-2b, as will be
appreciated, a piercing device 8 is inserted within, or otherwise
affixed to, the hub 9 of the syringe 1. In this manner, it will
be seen that compartment 6 is formed, of which may be pre-filled
or loaded with a fluid, or medication of choice.
[0007] Thus, and in order to carry out the objectives of the invention,
certain other requirements will be seen to be necessary. First of
all, the length of the hollow needle 8 is selected of sufficient
dimension to pierce the hollow floating plunger 5, but of such limited
length to stop short of the push stopper 3. The hollow needle 8
should have a relief port hole 7 bored into the side and located
close to the hub 9 of syringe 1 in chamber 6 as illustrated in FIG.
2c.
[0008] As thus described, the arrangement of FIGS. 1a-1c will be
seen to represent a syringe having two segregated compartments 4
and 6, and with a delivery needle 8 that has a piercing tip and
a relief port hole 7 of a type typically found in a prior-art cartridge
syringe frequently used. A cap (not shown) would normally be placed
over the delivery tip (needle or needless system), so as to create
a fluid tight compartment when not in use, but one where the cap
could be removed for appropriate delivery of the fluid to the person
or body where the fluid injection is to occur.
[0009] With such cap then in place over the delivery tip each of
the compartments 4 and 6 will be seen to be fluid tight--and, for
the injection of medication in chamber 6, and a normal saline flush
injection in compartment 4 with each compartment being segregated
one from another. But, by the removing the cap and applying pressure
on the plunger 2, the hollow floating plunger 5 will be seen to
advance as the fluid in chamber 6 closest to the delivery tip is
allowed to exit. With constant pressure on the plunger, then all
the fluid in compartment 6 will first evacuate under the force applied
by the hollow floating plunger 5. As the plunger 2 continues to
force the hollow floating plunger 5 to the hub 9 of the syringe
1 the hollow needle 8 punctures the thin membrane of the hollow
floating plunger 5. The relief porthole 7 allows the excess pressurized
fluid to be expelled to complete the motion of the hollow floating
plunger 5 as it becomes flush with the hub 9 of syringe 1.
[0010] As the plunger action continues, the segregated fluid in
chamber 4 is expelled through the hollow needle 8 until the push
stopper 3 is flushed against the hollow floating plunger 5. Thus,
by a single, continuous actuation of the plunger 2, a sequential
delivery of the fluids and or medications in compartments 4 and
6 are expelled, without the need for any refilling or reloading
of the syringe in use, and without any need for disconnecting it
from the injection site. |