# US 2013/0152982 A1 · Device for cleaning medical device

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- Number: US 2013/0152982 A1
- Document ID: US20130152982A1
- Status: Published application
- Kind: A1
- Application number: 13/819,211
- Filed: 2011-09-15
- Published: 2013-06-20
- Earliest claimed: 2010-09-16
- Assignees: Terumo Kabushiki Kaisha; Daikin Industries, Ltd.
- Inventors: Toshio Tanaka; Kenkichi Kagawa; Makoto Iwakame; Mitsuji Ohgami; Takanori Ijitsu; Shinichi Takahira; Eriko Ooshima
- Web page: https://patentgrep.com/patent/US20130152982A1

## CPC

- B08B 7/0035: {by radiant energy, e.g. UV, laser, light beam or the like}
- A61B 1/123: {using washing machines}
- A61B 90/70: Cleaning devices specially adapted for surgical instruments
- A61L 2/186: Peroxide solutions
- B08B 3/10: with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- C02F 1/4672: {by electrooxydation}
- A61L 2103/15: Laboratory, medical or dentistry appliances, e.g. catheters or sharps
- A61L 2202/14: Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
- A61L 2202/17: Combination with washing or cleaning means
- C02F 1/722: {Oxidation by peroxides}
- C02F 2201/46125: Electrical variables
- C02F 2201/4617: DC only
- C02F 2303/04: Disinfection
- B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

A medical device cleaning device includes a washing tank, and an electrical discharge generator. An endoscope to be cleaned is housed in the washing tank, and immersed in wash water. An electrical discharge unit of the electrical discharge generator is placed in the washing tank, and immersed in the wash water. A direct-current power supply is connected to a pair of electrodes of the electrical discharge unit. When the direct-current power supply applies a voltage to the pair of electrodes, streamer discharge is performed between the pair of electrodes to produce hydrogen peroxide. The endoscope is sterilized in the washing tank by using the hydrogen peroxide produced by the streamer discharge.

## Claims

### Claim 1

A medical device cleaning device, comprising:
a washing tank for housing a medical device, the medical device in the washing tank being cleaned with wash water, wherein
an electrical discharge generator including a pair of electrodes for inducing streamer discharge in the wash water, and a power supply configured to apply a voltage to the pair of electrodes is provided to produce hydrogen peroxide in the wash water by streamer discharge between the pair of electrodes, and
the medical device in the washing tank is cleaned with the wash water containing the hydrogen peroxide produced by the streamer discharge between the pair of electrodes.

### Claim 2 (depends on 1)

The medical device cleaning device of claim 1, wherein the pair of electrodes of the electrical discharge generator is placed in the washing tank.

### Claim 3 (depends on 1)

The medical device cleaning device of claim 1 further comprising:
an auxiliary tank in which the wash water is stored, and in which the pair of electrodes of the electrical discharge generator are placed; and
a conduit configured to carry the wash water containing the hydrogen peroxide from the auxiliary tank into the washing tank.

### Claim 4 (depends on 1)

The medical device cleaning device of claim 1, wherein
the power supply is formed by a direct-current power supply configured to apply a direct-current voltage to the pair of electrodes, and
the electrical discharge generator includes a current density concentration member configured to increase a current density in a current path between the pair of electrodes.

### Claim 5 (depends on 4)

The medical device cleaning device of claim 4, wherein the current density concentration member is formed as an insulative container having at least one opening, and surrounds only one of the pair of electrodes.

### Claim 6 (depends on 4)

The medical device cleaning device of claim 4, further comprising:
a shield member formed as a conductive net, grounded, and disposed around the pair of electrodes and the current density concentration member.