JP4124810B2 - Retention cap for extension tube - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a tube for preventing a contrast medium from dripping from an extension tube until the needle punctured into the patient blood vessel is coupled to the extension tube which has been bleed of air in the operation of injecting the contrast medium into the patient blood vessel. The present invention relates to a liquid storage cap.
[0002]
[Prior art]
Conventionally, a contrast agent that is pre-filled in a syringe or that that is filled in a syringe at the time of use is used. When a syringe pre-filled with a contrast agent is used, an extension tube is coupled to the syringe, and then the piston is pushed to release air from the tube. On the other hand, when filling the syringe with the contrast agent at the time of use, first, after filling the syringe with the contrast agent, the extension tube is coupled to the syringe, and the piston is pushed to release air from the syringe and the tube.
After the above air bleeding is completed, a needle called an indwelling needle is punctured into the patient's blood vessel. As a result, blood flows backward to fill the needle. Then, the extension tube that has been evacuated and the needle punctured into the patient's blood vessel are coupled (rotary coupling) to complete the connection. In this state, the injection of contrast medium is executed in accordance with the imaging timing.
[0003]
[Problems to be solved by the invention]
In the above-described operation, there is a problem in that a highly viscous contrast medium hangs down from the extension tube, which has been evacuated, to the potter, the floor, and the medical device while the needle is punctured into the patient's blood vessel and the needle is filled with blood.
An object of the present invention is to provide a reservoir cap for an extension tube that contains a contrast agent that hangs from the open end of the extension tube before the needle punctured into a patient's blood vessel and the extension tube are joined.
[0004]
[Means for Solving the Problems]
Liquid reservoir cap for extension tube according to the invention of claim 1, the extension tube that communicates the needle piercing the Shirijin patient vessels filled with contrast agent has an outer diameter equal to the tube open end vicinity of the extension tube fixed cylindrical base portion to the extension tube outer circumference is directly said threaded portion shaped tube is mounted for free rotation so as to project the tube open end cap attachment portion is configured to the base portion, said threaded portion A female thread to which a needle coupling portion of the needle is screw-coupled is formed on the inner peripheral surface of the extension tube.
It has an inside diameter that fits inside the threaded portion and the tube open end side of the extension tube enters, and the region where the extension tube enters is formed to have the same inside diameter, and part of the periphery of the cap mouth A cap mouth portion formed so that a pair of arc-shaped projecting ribs that act as male threads to be screwed into the female screw of the thread portion are opposite to each other , and the cap mouth portion are integrated, and the length of the outer surface A plurality of ridges extending in the direction are formed at a predetermined interval, and a liquid reservoir for containing a contrast agent that hangs from the open end of the extension tube before the needle is connected is provided.
According to the first aspect of the present invention, after the bleeding of the extension tube is completed, the reservoir cap is attached to the open end of the extension tube, so that the needle hangs down from the open end of the patient during the operation of puncturing the patient's blood vessel. A contrast agent is accommodated in the reservoir cap.
[0005]
In addition, align the open side of the extension tube with the cap mouth of the liquid reservoir cap and place it in the cap, and screw the cap mouth part to the cap mounting part of the extension tube to secure the liquid reservoir cap to the extension tube. The contrast agent that is attached and hangs down from the open end of the tube is reliably accommodated in the liquid storage cap.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of an embodiment of an extension tube cap according to the present invention.
The syringe 1 is attached to, for example, an injector holder of a CT contrast medium injection device head. The contrast medium filled in the syringe 1 is injected through the needle 20 punctured into the patient's blood vessel via the extension tube 2. The extension tube 2 includes one having a stopcock 3 on the syringe 1 side and one having no stopcock 3. The stopcock 3 is a valve that switches the liquid path in two directions by rotating the operation knob 5 in the direction of the arrow, and is configured so that the extension tube 2 that forms the other liquid path can be connected by removing the lid 4. ing.
[0007]
A needle 20 is coupled to the open end of the extension tube 2, and a cap mounting portion 6 for connecting the liquid storage cap 10 is provided. As shown in FIG. 2, the cap mounting portion 6 has a base portion 7 fixed to the extension tube 2, and a screw portion 8 having an internal thread 9 formed on the inner peripheral surface thereof is attached to the base portion 7 so as to be freely rotatable. . The liquid reservoir cap 10 or the needle 20 is screwed to the screw portion 8 by using the cap mouth portion 11 and the needle coupling portion 21. FIG. 3 shows a coupling state of the liquid storage cap 10.
[0008]
The liquid storage cap 10 will be described in detail. FIG. 4 is a partial cross-sectional view showing an embodiment of the liquid storage cap for an extension tube according to the present invention, FIG. 5 is a front view of the cap mouth portion, and FIG. 6 is a cross-sectional view taken along II in FIG. The liquid reservoir cap 10 includes a cap mouth portion 11 connected to the open end of the tube, and a liquid reservoir portion 12 that stores a contrast agent hanging from the open end of the tube. The cap mouth portion 11 has an outer diameter that fits inside the screw portion 8, and a part of the periphery of the cap mouth portion 11 functions as a male screw that is screwed into the female screw of the screw portion 8 as shown in FIG. Protruding ribs 13 are formed. On the outer surface of the liquid reservoir 12, a plurality of ridges 14 extending in the longitudinal direction are formed at intervals of a predetermined angle as shown in FIG.
In the present embodiment, the needle coupling portion 21 of the needle 20 has the same structure as the cap mouth portion 11, and the needle 20 is extended using the cap mounting portion 6 in the same manner as the mounting operation of the liquid storage cap 10. It can be coupled to the tube 2.
[0009]
Next, the use of the liquid storage cap of this embodiment will be described. In FIG. 1, after connecting the extension tube 2 to the syringe 1 filled with the contrast agent, the extension tube 2 is vented by pushing the piston. After the air venting is finished, the cap mouth portion 11 of the liquid storage cap 10 is aligned with the cap mounting portion 6 of the extension tube 10, and the screw portion 8 is turned to be screw-coupled to the open end of the extension tube 2 as shown in FIG. 3. A liquid storage cap 10 is attached. In this operation, the liquid storage cap 10 can be firmly held by the protrusions on the outer periphery of the liquid storage cap 10 and can be mounted reliably and in a short time. After the reservoir cap 10 is attached, the needle is punctured into the patient's blood vessel. As a result, blood flows backward to fill the needle. During this time, the contrast agent hanging from the open end of the extension tube 10 is accommodated in the liquid storage cap 10. The extension tube 2 that has been evacuated and the needle that has punctured the patient's blood vessel are connected to complete the connection. In this state, the injection of contrast medium is executed in accordance with the imaging timing.
[0010]
【The invention's effect】
According to the present invention, since the liquid storage cap is attached to the open end of the extension tube, the contrast agent dripping from the open end of the tube is accommodated in the liquid storage cap during the operation of puncturing the needle into the patient's blood vessel. It is possible to prevent the contrast agent from dripping onto the floor or medical equipment from the open end.
Further, when the liquid storage cap is screw-coupled by turning the cap mounting portion, the liquid storage cap can be firmly held by the protrusions formed on the outer periphery thereof, and can be mounted reliably and in a short time. Further, the cap mounting portion is a common coupling member to the extension tube of the needle and the liquid storage cap, and can be mounted by the same operation.
[Brief description of the drawings]
FIG. 1 is an explanatory view of an embodiment of a liquid storage cap for an extension tube according to the present invention.
FIG. 2 is a cross-sectional view of a cap mounting portion of an extension tube.
FIG. 3 is a view showing a state in which a liquid storage cap is attached to the cap attachment portion of the extension tube.
FIG. 4 is a view showing a half cross section showing an embodiment of the liquid storage cap for an extension tube according to the present invention.
FIG. 5 is a front view of the cap mouth portion of the extension tube liquid reservoir cap according to the present invention.
6 is a cross-sectional view taken along the line II of FIG.
[Explanation of symbols]
1 Syringe 2 Extension tube 3 Stopcock 6 Cap mounting part 10 Liquid reservoir cap

Claims (1)

Extension tube that communicates Shirijin filled with contrast medium and a needle for puncturing a patient blood vessel has an outside diameter equal, a cylindrical base portion is fixed directly to the extension tube outer peripheral surface of the tube open end vicinity of the extension tube, the A cylindrical threaded portion is attached to the base so as to protrude from the open end of the tube so as to be freely rotatable, and a cap mounting portion is configured, and a needle coupling portion of the needle is screwed to the inner peripheral surface of the threaded portion. A female reservoir cap for the extension tube that is screwed to the female screw,
It has an inside diameter that fits inside the threaded portion and the tube open end side of the extension tube enters, and the region where the extension tube enters is formed to have the same inside diameter, and part of the periphery of the cap mouth A cap mouth portion formed so that a pair of arc-shaped projecting ribs that act as male threads to be screwed into the female screw of the thread portion are opposite to each other , and the cap mouth portion are integrated, and the length of the outer surface A liquid for an extension tube comprising a plurality of ridges extending in a direction at a predetermined interval, and a liquid reservoir for containing a contrast agent that hangs from the open end of the extension tube before the needle is joined. Reservoir cap.

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