JPH0546767Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an attachment for pulling the piston of a syringe, which allows the syringe barrel to be pulled with one hand. In order to easily aspirate body fluids from humans and animals, it is mainly attached to disposable plastic syringes, and the piston of the syringe can be strongly pulled using the grip strength of one hand.

(Prior Art) A syringe is an instrument for injecting medicinal fluid into the body of humans and animals, but it is also used to suck out pleural fluid, ascites, pus, etc. from the body. This is because if existing medical suction devices are used, it is extremely troublesome to clean up dirty instruments, such as cleaning and disinfecting them, so it is more convenient to use disposable plastic syringes.

(Problem to be solved by the invention) The ordinary syringe shown in FIG. 5 consists of two slidable inner and outer cylinders. The outer cylinder that holds the medicinal liquid is called the cylinder, and the inner cylinder that pushes out the medicinal liquid is called the piston, plunger, or simply syringe. It is designed so that it can be injected with one hand by holding the index finger and middle finger between the finger rest collar 16 provided at the rear end of the cylinder 14 and pressing the finger rest collar 17 at the rear end of the piston 15 with the pad of the thumb. .

However, if the syringe is used for purposes other than its intended purpose of aspirating body fluids, it becomes impossible to use it with one hand and requires the use of both hands.

In other words, since a strong suction force is required to suck liquid from a body cavity with negative pressure, the cylinder 14 can be used with one hand.
At the same time as you squeeze the piston 15, you must pull the piston 15 as hard as you can with your other hand. However, the collar 17 at the rear end of the piston is disc-shaped, and the only way to pick it is by hooking your fingertips on it.
I couldn't pull the piston with too much force. Moreover, my fingertips dug into the edge of brim 17,
The drawback was that it quickly became painful.

A further serious drawback is that the punctured needle tip tends to be unstable. Since the syringe must be operated with both hands, the surgeon tries to keep the needle tip as still as possible by placing both elbows on a table or placing them close to the armpits, but even so, caution is required. There were considerable risks associated with suctioning out spinal fluid and joint fluid.

The problem that this invention aims to solve is what kind of attachment structure should be attached to the syringe in order to free up one hand of the operator when the syringe is used as a substitute for body fluid aspiration.

(Means for Solving the Problems) In order to solve the problems described above, this invention has the following configuration. That is, an appropriately shaped grip 2 is connected to an appropriately shaped cylinder holding member 1, an appropriately shaped handle 4 is connected to an appropriately shaped piston holding member 3, and the cylinder holding member 1 and piston holding member 3 are connected to each other. are slidably connected by a suitably shaped slide member 5.

(Operation) A cylinder is attached to the cylinder holding member 1, and a piston is attached to the piston holding member 3, and the tip of the piston is pushed deep into the cylinder, and then the affected area is punctured. The cylinder with the needle fitted at the tip is inserted into the grip 2 through the cylinder holding member 1.
By placing the grip 2 between the thumb and index finger and gripping the grip 2 tightly with the tips of the other fingers, the needle tip can be firmly and stably inserted into the affected area. Next, hold the crotch of your thumb 2
While supporting the handle, extend the fingertips of the other four fingers and attach the handle 4.
, and pull the handle 4 while bending your fingertips as if making a fist. Then, the piston holding member 3, which is slidably connected to the cylinder holding member 1 via the slide member 5, retreats in conjunction with the retreat of the handle 4. Therefore, the piston is pulled by the grip force that pulls the handle 4, and the inside of the cylinder becomes negative pressure. As a result, a strong suction force is generated, so that body fluids are sucked into the cylinder.

(Embodiments) First Embodiment FIGS. 1 and 2 are a perspective view and a side sectional view showing a first embodiment of this invention. In this embodiment, the appropriately shaped cylinder holding member 1 and piston holding member 3, as well as the grip 2 and the pull handle 4, are all prismatic rectangular parallelepipeds. In the center of both members 1 and 3 for holding the cylinder and piston, there are provided collar grooves 6 and 7 of an appropriate shape into which the collar provided at the rear end of the syringe is fitted. In addition, two metal round bars are used as the slide member 5,
A cylinder holding member 1 and a grip 2 are connected to each end of a parallel round bar with an interval large enough to accommodate four fingers of one hand. In order to slidably connect the piston holding member 3, holes 8, 8 for inserting round rods are provided in both the upper and lower parts of the piston holding member 3.
The pull 4 connected to the rear of the piston holding member 3 is
Although they are fixed at intervals such that a fingertip can fit through the rod-shaped body, the connecting means is not particularly limited. Furthermore, both the upper and lower ends of the handle 4 are formed into semicircular shapes so that they can easily slide on the surface of the round bar, but the shape of these can also be arbitrary.

In this embodiment, the syringe is mounted by fitting the finger rest collar 16 at the rear end of the cylinder into the collar groove 6 and the finger rest collar 17 at the rear end of the piston into the collar groove 7. After inserting the needle into the affected area, while supporting the grip 2 with the crotch of your thumb, pull the handle 4 firmly with your index finger and below to release the two parallel slide members 5.
The piston holding member 3 recedes straight along. Accordingly, the piston 15, which is locked by the flange groove 7, is pulled out.

Second Embodiment FIGS. 3, 4, and 5 are a perspective view, a front view, and a side sectional view showing a second embodiment of this invention. In the second embodiment, elongated flat plates are used as the cylinder holding member 1 and the piston holding member 3. At the rear ends of both members, two small plates are vertically erected to form collar stops 9 and 10 in order to respectively lock the collars of syringes. The slide member 5 also has a flat plate shape and is integrally molded on the lower surface of the cylinder holding member 1, and has a T-shaped groove 11 in the center for slidably connecting the piston holding member 3. The handle 4 connected to the tip of the piston holding member 3 may have any shape and size as long as it can be pulled with four fingers of one hand. Similarly, the grip 2 connected to the rear end of the cylinder holding member 1 also
Any handle can be used as long as it can be grasped with one hand, and a cavity 12 for storing the handle 4 is provided in the center. In addition, in FIG. 3, the reinforcing plate 13 is shown at the part where the piston holding member 3 and the handle 4 are connected, but this may be omitted.

In the second embodiment, after attaching the syringe, hold the grip 2 and handle 4 in one hand as if gripping the piston, and after puncturing the needle into the affected area, squeeze the five fingers tightly. Then, the piston holding member 3 retreats along the T-shaped groove 11 of the slide member 5 integrally molded with the cylinder holding member 1. Accordingly, the piston 15 is pulled out from the cylinder 14 with a strong force.

(Effects of the invention) By using the syringe piston traction attachment related to this invention, it can be detachably attached to a conventional plastic disposable syringe, grip the handle and handle, and easily be used by humans or other people with just the grip strength of one hand. Capable of sucking body fluids from the animal's body. Therefore, since one hand is free, the operator can reliably maintain his or her posture by applying the free hand to the affected area. As a result, the needle tip remains stable during aspiration, making it possible not only to drain pleural fluid, ascites, and pus, but also to safely collect spinal fluid and joint fluid, which require more careful manipulation.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the piston traction attachment of the present invention, FIG. 2 is a side sectional view of FIG. 1, and FIG. 3 is a perspective view showing a second embodiment of the present invention.
4 is a front view of FIG. 3, and FIG. 5 is a side sectional view of FIG. 3. 1...Cylinder holding member, 2...Grip, 3...
...Piston holding member, 4...Holder, 5...Slide member, 6...Brim groove, 7...Brim groove, 8...
Hole, 9...Brim stop, 10...Brim stop, 11...
... T-shaped groove, 12 ... cavity, 13 ... reinforcement plate.

Claims (1)

[Scope of utility model registration request] An appropriately shaped grip 2 is connected to an appropriately shaped cylinder holding member 1, and an appropriately shaped piston holding member 3 is attached.
An attachment for pulling a piston of a syringe, in which a suitably shaped handle 4 is connected to the cylinder holding member 1 and the piston holding member 3 are slidably connected by a suitably shaped slide member 5.