JPH0628123Y2 - Body fluid treatment circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is an improvement of a body fluid treatment circuit, and in particular, an adapter is provided at the end of an infusion tube constituting an infusion line attached in the middle of the body fluid introduction circuit. The present invention relates to a body fluid treatment circuit, which is mounted so that blood in the body fluid treatment circuit can be returned to a patient in a clean state after blood treatment.

[Problems to be Solved by Conventional Techniques and Inventions] A body fluid treatment circuit 51 currently used is a body fluid introduction circuit 52 provided with an infusion line 54, as shown in FIG.
The shunt adapter 55 is connected to the end of the outer cylinder needle of the indwelling needle punctured by the patient, and the blood of the patient is introduced into the body fluid treatment circuit 51. After the treatment, the blood was returned to the patient again via the shunt adapter 57.

The operation of returning the blood in the body fluid treatment circuit 51 after the body fluid treatment is completed is performed as follows.

(1) Remove from the patient's shunt with the outer needle attached to the adapter 55.

(2) Further remove the outer cylinder needle from the adapter 55, and attach the adapter 55 to the connector 5 with a luer taper.
Connect to 8.

(3) The saline solution in the saline bottle 60 is added to the infusion line 5
4 → Introduced into the body fluid treatment circuit 51 via a route such as the connectors 58 and 55.

(4) The blood in the body fluid treatment circuit 51 is completely replaced with physiological saline and returned to the patient.

However, when the outer cylinder needle of the indwelling needle is removed from the adapter, various bacteria may be mixed in through the opening of the adapter 55, and blood of the patient leaks from the opening and adheres to workers, etc., resulting in infection. It was dangerous and unpleasant. Therefore, the present inventors have made intensive studies to solve the above problems, and as a result, arrived at the next invention.

[Means for Solving the Problem] A circuit for circulating body fluid extracorporeally, comprising a body fluid introduction circuit 2 and a body fluid discharge circuit 3 provided with an infusion line 5 on the way, and the infusion line 5 is equipped with an infusion needle 28. Infusion tube 1 with attached infusion tube 13 and adapter 17
2, the adapter 17 includes an indwelling needle mounting portion 1
The body fluid treatment circuit 1 is composed of 8 and a fixing portion 19.

[Operation] With the outer cylinder needle 23 of the indwelling needle attached to the shunt adapter 10, the shunt adapter 10 is connected to the connector 17, and the body fluid treatment circuit 1
The blood inside can be returned to the patient's body without leakage or contact with outside air.

[Embodiment] FIG. 1 is a schematic view of a body fluid treatment circuit 1 of the present invention (in the figure, 30 is a body fluid treatment device). The body fluid treatment circuit 1 is composed of a body fluid introduction circuit 2 and a body fluid delivery circuit 3, and the body fluid introduction circuit 2 is
It is composed of a main tube 4, an infusion line 5 provided branching in the middle of the main tube 4, a rolling tube 6 provided in the middle of the main tube 4, a drip chamber 7, and a shunt adapter 10.

On the other hand, the body fluid derivation circuit 3 is composed of a main tube 8, a drip chamber 9 branched and provided in the middle of the main tube 8, and a shunt adapter 11.

Further, the infusion line 5 is provided with the flow rate adjusting member 1 on the way.
Infusion tubes 12, 13 equipped with 5, 16 are Y-shaped tubes 1
The infusion tube 12 is provided so as to branch through 4
An adapter 17 is attached to the end of the adapter, and the adapter 17 is formed as shown in FIG. Adapter 1
7 is composed of a mounting portion 18 and a fixing portion 19 of the outer cylindrical needle 23 of the indwelling needle. Further, as shown in FIGS. 3 and 4, the mounting portion 18 includes a base end portion 20, a conical portion 21, and a flat plate portion 22. The conical portion 21 and the flat plate portion 22 may be integrally formed from flexible synthetic resin, and the base end portion 20 may be formed from hard synthetic resin. It may be formed and the conical portion 21 may be attached thereto.

The mounting portion 18 formed by the former means is mounted on the end portion of the infusion tube 12 by means such as heat welding of the base end portion 20, and the mounting portion 18 formed by the latter means is the base end portion 2.
0 is press-fitted into the end of the liquid transfusing tube 12 to be mounted.

The fixing portion 19 is made of synthetic resin, rubber, or the like having elastic recovery force, is attached to the outer periphery of the flat plate portion 22, and prevents the end portion of the flat plate portion 22 from opening before inserting the outer cylindrical needle 23 of the indwelling needle. This is compressed.

The operation of returning the blood in the body fluid treatment circuit 1 after finishing the dialysis can be performed as follows.

(1) Pull out the outer cylinder needle 23 of the indwelling needle from the shunt of the patient.

(2) The adapter 17 attached to the infusion tube 12 with the outer cylinder needle 23 attached to the adapter 10 (see FIG. 1)
Then, the outer cylinder needle 23 is connected (see FIGS. 5 to 6).
The tip 24 of the outer cylinder needle 23 penetrates the flat plate portion 22 and reaches the space of the infusion tube 12 while pushing the flat plate portion 22 wide, so that a liquid flow path between the outer cylinder needle 23 and the infusion tube 12 can be secured. On the other hand, the needle base 25 of the outer tubular needle 23 is brought into contact with the conical portion 21, and the base portion of the tip end 24 is crimped by the fixing portion 19, so that the outer tubular needle 23 is attached to the adapter 17.

(3) Infusion needle 28 attached to the tip of the infusion tube 13
Is connected to a saline bottle 29, and a physiological saline solution is introduced into the body fluid treatment circuit 1 via a route such as an infusion tube 13, an infusion tube 12, an outer needle 23, a shunt adapter 10 and a main tube 4.

(4) The blood in the body fluid treatment circuit 1 is completely replaced with physiological saline and returned to the patient.

[Advantage of the Invention] In the present invention, the blood in the body fluid treatment circuit 1 can be returned without removing the outer cylindrical needle 23 of the indwelling needle from the shunt adapter 10, so that blood leakage from the shunt adapter 10 is eliminated, and the operator Can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic view of a body fluid treatment circuit, FIGS. 2 to 4 are enlarged views of an adapter, FIGS. 5 to 6 are usage diagrams of the adapter, and FIG. 7 is a schematic view of a conventional body fluid treatment circuit. Indicates. In the figure, 1 is a bodily fluid treatment circuit, 2 is a bodily fluid introduction circuit, 3 is a bodily fluid delivery circuit, 5 is an infusion line 17, an adapter, 18 is an indwelling needle mounting portion, and 19 is an indwelling needle fixing portion.

Claims (1)

[Scope of utility model registration request] 1. A circuit for circulating body fluid extracorporeally, comprising a body fluid introducing circuit having an infusion line in the middle and a body fluid discharging circuit, wherein the infusion line has an infusion tube equipped with an infusion needle and an infusion solution equipped with an adapter. A body fluid treatment circuit comprising a tube, wherein the adapter is composed of an indwelling needle mounting portion and a fixing portion.