JP2818520B2 - Treatment of bloody waste liquid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating aqueous waste liquid containing blood (bloody waste liquid).

[0002]

2. Description of the Related Art Waste fluid containing body fluid generated from a patient during or after surgery is collected by suction in a collection container having a negative pressure, and then subjected to waste disposal. The collection container after the waste liquid is taken out is washed, sterilized, and reused. However, since the collection container is a glass product, it is easily broken, and is heavy (normally, a volume of 5 to 8 liters). Further, when disposing of filth, there is a case where the splash of the waste liquid is applied to a handler, which is dangerous. Waste fluids containing body fluids from infectious disease patients are usually sterilized, but may not be sterilized, and if such waste fluids are splashed, they are at risk of infection.

[0003] To eliminate such drawbacks in handling, a waste liquid treatment method using a disposable synthetic resin collection container is proposed in Japanese Patent Application Laid-Open No. 51-48589. However, even when disposable collection containers are used, the containers are damaged at the stage of transporting the collected containers to the treatment facility, and the waste liquid in the containers overflows, and the waste liquid scatters when the entire container is incinerated and incinerated, There is a problem such as spillage, which is not only a hygienic problem, but also dangerous for those who ultimately dispose of it.

[0004] In order to solve such a problem, Japanese Patent Application Laid-Open No. 2-157083 proposes a method in which a superabsorbent polymer is introduced into a waste liquid as a coagulant to gel the waste liquid. Since the superabsorbent polymer absorbs water in the waste liquid and gels, the contents do not scatter or flow out even if the container or the like is damaged.

[0005]

However, wastewater generated during surgery contains not only water but also Na in blood and body fluids.
Metal ions such as ions and saccharides are often included.
The waste fluid containing blood (hereinafter referred to as “blood waste fluid”) requires a long time until the entire blood waste fluid loses fluidity because the protein component in the blood does not gel by the superabsorbent polymer. For example, a bloody effluent having a blood concentration of 50% or more requires two hours for coagulation. In addition, metal ions, saccharides, and the like contained in body fluids also interfere with water absorption of the superabsorbent polymer, and contribute to coagulation delay.

[0006] The delay of waste liquid coagulation means that the collection container must be stored until the bloody waste liquid coagulates, so that it is not possible to dispose of it promptly and there is a problem in safety.
The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a bloody waste liquid that can be coagulated in a short time, in addition to water, even a bloody waste liquid containing blood. It is to provide a processing method.

[0007]

According to the present invention, there is provided a method for treating bloody waste liquid, wherein the bloody wastewater is sucked into a collecting container made of synthetic resin and collected, and then the bloody wastewater is discarded together with the collecting container. A superabsorbent polymer and a protein crosslinking agent are added to the bloody waste liquid in the collection container to coagulate the bloody wastewater.

[0008]

In the treatment method of the present invention, the superabsorbent polymer gels by absorbing the water in the bloody waste liquid, and blood proteins that are not absorbed by the superabsorbent polymer are insolubilized and precipitated by the action of the protein crosslinking agent. Therefore, even if it is a bloody waste liquid, it becomes possible to coagulate and process it in a short time in the same manner as a waste liquid containing no blood.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method for treating bloody waste liquid of the present invention is a method of coagulating and treating bloody waste liquid using a protein crosslinking agent as a coagulation accelerator together with a superabsorbent polymer as a coagulant. Examples of superabsorbent polymers include sodium polyacrylate, a graft copolymer of starch and sodium polyacrylate, a saponified product of a copolymer of vinyl acetate and methyl acrylate, and a copolymer of vinyl acetate and maleic anhydride. A saponified product, a saponified product of isobutylene and a maleic anhydride copolymer, and the like are used.

[0010] The protein cross-linking agent reacts with the amino group or carboxyl group released in the blood protein to make it insoluble, and specifically, an aldehyde cross-linking agent such as glutaraldehyde, glyoxal or acetaldehyde is used. . Among the aldehyde-based crosslinking agents, glutaraldehyde is particularly preferably used. Since glutaraldehyde also has a bactericidal effect, it is preferable from a sanitary point to bloody waste liquid collected from a carrier. Aldehyde-based cross-linking agents may be solid or liquid, such as powder,
Any form can be used. The solid aldehyde-based crosslinking agent may be used as an aqueous solution.

The method of putting the above-mentioned protein crosslinking agent and superabsorbent polymer into the collection container can be appropriately selected depending on the form of the protein crosslinking agent, the type of the collection container, and the like. For example, after the protein cross-linking agent is dropped first, the superabsorbent polymer is dropped; the protein cross-linking agent and the superabsorbent polymer are simultaneously dropped; after the superabsorbent polymer is dropped, the protein cross-linking agent is dropped; For example, a method of mixing a protein cross-linking agent with a superabsorbent polymer and dropping the mixture may be used.

FIG. 1 shows an embodiment of a collection container for carrying out the processing method of the present invention. In FIG. 1, reference numeral 1 denotes a container body for storing a bloody waste liquid, and a lid 2 of the container body 1 has an injection pipe 3 for injecting the waste liquid into the container body 1 and a negative space inside the container body 1. A suction pipe 4 connected to a suction pump (not shown) or the like is provided to increase the pressure. Lid 2
A coagulant storage section 5 is provided in a central part of the coagulant storage section 5 so as to protrude upward, and a guide cylinder 6 for guiding a push bar is provided substantially above the center of the coagulant storage section 5. A dropout port 7 projecting to the center and provided at the bottom of the coagulant storage section 5 for dropping the stored coagulant into the container body 1.
Is open. The outlet 7 is closed by a stopper 9 formed integrally with the rod at the tip of a push bar 8 inserted into the guide cylinder 6 and having an outer diameter larger than the diameter of the rod. In the figure, reference numeral 10 denotes a filter having a function of stopping suction when a predetermined amount of bloody waste liquid is injected into the container body 1.

A uniform mixture of the superabsorbent polymer and the protein crosslinking agent powder is stored in the coagulant storage section 5 of the collection container having the above-described configuration. After injecting a predetermined amount of bloody waste liquid into the container body 1, the push bar 8 is pushed down,
The plug 9 that has closed the dropout port 7 of the coagulant storage unit 5 is removed. When the stopper 9 moves downward, a gap is formed in the outlet 7, and the superabsorbent polymer and the protein crosslinking agent fall into the container body 1 through the gap. Blood protein components in the bloody waste fluid are insolubilized by a protein crosslinking agent,
The water in the bloody waste liquid is absorbed by the superabsorbent polymer, and the whole bloody waste liquid gels. Conventionally, the time until the whole gelled is because blood protein, which was the cause of delaying coagulation of bloody waste liquid, was easily insolubilized by the protein crosslinking agent and gelled, so that only the superabsorbent polymer was dropped. Is significantly reduced.

The coagulation promoting effect of the combined use of a protein crosslinking agent will be described based on specific examples. When 100 cc of a 50% aqueous glutaraldehyde solution was added to 2 liters of a bloody waste liquid having a blood concentration of 50%, blood proteins in the bloody waste liquid precipitated. Next, 120 g of the superabsorbent polymer was added to the bloody waste liquid in which the blood protein was precipitated, and after 2 minutes, the whole bloody waste liquid solidified.

On the other hand, 2 l of bloody waste liquid having a blood concentration of 50%
When only 120 g of superabsorbent polymer was added to
It took 105 minutes for the whole bloody waste liquid to solidify. These results show that the coagulation time of the bloody waste liquid can be reduced by using the protein crosslinking agent in combination with the superabsorbent polymer. The treatment method of the present invention also has a coagulation promoting effect on bloody waste fluid containing ions such as physiological saline containing Na ions. For example, to coagulate 2000 cc of a mixture of physiological saline and an aqueous solution of hypochlorous acid (the concentration of NaCl in the mixture is 0.9% and the concentration of hypochlorous acid is 0.5%), When only 120 g of the superabsorbent polymer was added, it took 50 minutes despite the fact that it took 17 minutes to solidify.
When 100 cc of a glutaraldehyde aqueous solution was used in combination with 120 g of a superabsorbent polymer, solidification occurred in 9 minutes. When the aqueous solution of glutaraldehyde was added to the mixed solution, the mixture became cloudy, and it is understood that the glutaraldehyde interacted with ions in the mixed solution and assisted the water absorption of the superabsorbent polymer. It should be noted that even with physiological saline alone, coagulation was faster when used in combination with an aqueous glutaraldehyde solution than when only the superabsorbent polymer was added.

[0016]

According to the treatment method of the present invention, the blood in the bloody waste liquid which causes a delay in coagulation due to the superabsorbent polymer is insolubilized by the protein crosslinking agent. Even a bloody waste liquid having a high blood concentration that requires a long time for gelation can be quickly and quickly coagulated. Therefore, the bloody waste liquid generated during or after the operation does not need to be stored for coagulation, and can be safely and promptly disposed of.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an embodiment of a processing apparatus that performs a processing method of the present invention.

[Explanation of symbols]

 Reference Signs List 1 container body 5 coagulant storage part 7 dropper

Continued on the front page (72) Inventor Mie Higashi 4-36, Hamadera-Funaomachi, Sakai-shi, Osaka Dai-ken Medical Device Co., Ltd. (72) Inventor Yukio Masuda 1-150 Fukushima, Fukushima-ku, Osaka-shi, Osaka No. Osaka University Hospital Hospital Central Surgery Department (72) Inventor Hiroshi Nakatani 1-1-1 Fukushima, Fukushima-ku, Osaka City, Osaka Prefecture Osaka University Hospital Hospital Central Surgery Department (72) Inventor Nobutaka Ikehata Osaka-shi, Osaka Osaka University University Hospital, Central Surgery Department (72) Inventor Seizo Nakata 1-1-1 Fukushima, Fukushima-ku, Osaka City, Osaka City Osaka University Hospital, Central Surgery Department (72) ) Inventor Takuya Ikeda 1--50 Fukushima, Fukushima-ku, Osaka-shi, Osaka, Japan Central Hospital, Osaka University Hospital (56) References JP-A-2-157083 (JP, A) JP-A-4-264183 ( JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) C02F 1/00 A61B 19/00 A61G 12/00

Claims (2)

(57) [Claims] 1. A method for treating a bloody waste liquid, wherein the bloody waste liquid is sucked into a collecting container made of synthetic resin and collected, and then the bloody waste liquid is discarded together with the collecting container. And treating the bloody waste liquid by coagulating the bloody waste liquid by adding a protein crosslinking agent. 2. A method for treating bloody waste liquid, wherein glutaraldehyde is used as a protein crosslinking agent.