News Column

Researchers Submit Patent Application, "Medical Device", for Approval

February 18, 2014



By a News Reporter-Staff News Editor at Life Science Weekly -- From Washington, D.C., NewsRx journalists report that a patent application by the inventor MIKKAICHI, Takayasu (Tokyo, JP), filed on July 17, 2013, was made available online on February 6, 2014 (see also Olympus Medical Systems Corp.).

The patent's assignee is Olympus Medical Systems Corp.

News editors obtained the following quote from the background information supplied by the inventors: "The present invention relates to a medical device and, more particularly, to a medical device that can be properly used for medical treatment in which negative pressure is locally applied in the body.

"There are various types of inflammation which occur at bursiform cavities in a body. For example, in an anterior resection of the rectum, when a complication is caused, an anastomotic leak is caused and may be developed to abscess formation. The best way to treat such an abscess occurring in the body is not known, and surgical procedures such as drainage of fluid, anastomosis excision, fistula formation, etc. and conservative procedures such as administration of broad-spectrum antibiotics, restriction of food ingestion based on parenteral nutrition, etc. are conducted.

"The inflammation of the bursiform cavities in the body may include, for instance, appendicitis. Appendicitis is often treated by excising the vermiform appendix. On the other hand, when appendicitis is suspected, there are cases in which the appendicitis can be treated without excising the vermiform appendix, and cases in which there is no actual appendicitis.

"As one of the aforementioned methods of treating the abscess or the inflammation, a wound treatment based on negative pressure (negative pressure therapy) is known. The negative pressure therapy is disclosed in, for instance, Published Japanese Translation No. 2006-505316 of the PCT International Publication. According to a specific example of this therapy, a foam is positioned and disposed in a bursiform cavity (including an abscess) in the body of a patient using an introducer as a collecting means for collecting contents of the bursiform cavity. The foam is, for instance, an open-cell polyurethane ether foam. This foam is connected to a vacuum device via a flexible thin tube. The vacuum device is equipped with a collecting unit that collects an outflow such as a liquid forcibly discharged from the bursiform cavity and a negative-pressure source that maintains the cavity under negative pressure.

"When the disposition of the foam is completed, the introducer is removed. Next, the negative pressure is applied to the foam. Since this negative pressure is uniformly applied to a wall of the cavity by the foam, the bursiform cavity is contracted. As a result, the outflow such as liquid or necrotic tissue which is present in the cavity is forcibly discharged from the cavity. This discharge is collected in the collecting unit via a tube. Thereby, the inflammation in the cavity is effectively treated. After the treatment is completed, the foam is removed.

"In the case of the negative pressure therapy, it is necessary to seal the bursiform cavity. In the case of the technique set forth in Published Japanese Translation No. 2006-505316 of the PCT International Publication, a sealing is achieved by a shape of the cavity treated by the foam as a pressure distributor, a structure (e.g., an anus of a patient) of a passage of the body into which the introducer is pressed, or a certain adhesive drape used for vacuum adjunct treatment of the surface of the body."

As a supplement to the background information on this patent application, NewsRx correspondents also obtained the inventor's summary information for this patent application: "According to a first aspect of the present invention, a medical device for endoscopically conducting negative pressure therapy on a bursiform cavity having an opening in a body includes a longitudinal axis member which has a lumen extending along a longitudinal axis so as to be capable of being inserted into the body, a suction member which is provided at a distal end of the longitudinal axis member so as to be capable of being inserted into the bursiform cavity, the suction member having a contact surface for coming into close contact with an inner wall of the bursiform cavity when inserted into the bursiform cavity, and the suction member having a plurality of communication passages that are open to the contact surface and communicate with the lumen; a suction source which is provided at a proximal end of the longitudinal axis member so as to be connected to the lumen, and the suction source suctioning the inner wall via the plurality of communication passages; and a closing member which is provided at an axial end of the suction member, the closing member coming into contact with the opening and airtightly sealing the opening.

"According to a second aspect of the present invention, in the medical device according to the first aspect, the closing member may be curved toward the suction member in a concave shape.

"According to a third aspect of the present invention, the medical device according to the first aspect may include a pusher for moving the closing member. The lumen may be connected with the suction member, and the closing member may be mounted on the longitudinal axis member so as to be capable of moving in an axial direction of the longitudinal axis member.

"According to a fourth aspect of the present invention, in the medical device according to the third aspect, the closing member may be formed of an elastically deformable material, be introduced into the body in a state in which a diameter thereof is reduced less than that of an initial shape, and be restored to the initial shape in the body.

"According to a fifth aspect of the present invention, the medical device according to the first aspect may further include an expansion part deformed between a first shape and a second shape enlarged over the first shape, and a manipulation member for changing the expansion part from the first shape to the second shape.

"According to a sixth aspect of the present invention, a medical device for conducting negative pressure therapy on a local site in a body includes a longitudinal axis member has a lumen extending along a longitudinal axis so as to be capable of being inserted into the body; a suction member which is provided at a distal end of the longitudinal axis member so as to be capable of being inserted into a tubular cavity in the body, and the suction member having a contact surface for coming into close contact with an inner wall of the tubular cavity when inserted into the tubular cavity, and the suction member having a plurality of communication passages that are open to the contact surface and communicate with the lumen; a suction source which is provided at a proximal end of the longitudinal axis member so as to be connected to the lumen and the suction source suctioning the inner wall of the tubular cavity via the plurality of communication passages; and a closing member which is provided at an axial end of the suction member and the closing member airtightly sealing the inner wall that comes into close contact with the contact surface.

"According to a seventh aspect of the present invention, the medical device according to the sixth aspect may further include an expansion part that is formed in an approximately cylindrical shape, is disposed inside the suction member, and enlarges dimensions of the suction member by changing from a first shape to a second shape.

"According to an eighth aspect of the present invention, the medical device according to the seventh aspect may further include a covering member that is mounted on an outer or inner peripheral surface of the expansion part and holds airtightness of an inner cavity of the expansion part.

BRIEF DESCRIPTION OF THE DRAWINGS

"FIG. 1 is a configurational view for describing one example of a basic configuration of a medical treatment system for conducting negative pressure therapy according to a first embodiment.

"FIG. 2A illustrates a medical device according to the first embodiment.

"FIG. 2B illustrates the medical device according to the first embodiment.

"FIG. 2C illustrates another example of the medical device.

"FIG. 2D illustrates another example of the medical device.

"FIG. 3 is a flow chart for describing one example of a sequence of the negative pressure therapy conducted by the medical treatment system according to the first embodiment.

"FIG. 4A describes an operation of the medical treatment system when used according to the first embodiment.

"FIG. 4B describes an operation of the medical treatment system when used according to the first embodiment.

"FIG. 4C describes an operation of the medical treatment system when used according to the first embodiment.

"FIG. 4D describes an operation of the medical treatment system when used according to the first embodiment.

"FIG. 4E describes an operation of the medical treatment system when used according to the first embodiment.

"FIG. 4F describes an operation of the medical treatment system when used according to the first embodiment.

"FIG. 4G describes an operation of the medical treatment system when used according to the first embodiment.

"FIG. 5A illustrates a modification of an applicator.

"FIG. 5B illustrates a modification of the applicator.

"FIG. 5C illustrates a modification of the applicator.

"FIG. 6A illustrates a modification of a closing member.

"FIG. 6B illustrates a modification of the closing member.

"FIG. 6C illustrates another modification of the closing member.

"FIG. 6D illustrates another modification of the closing member.

"FIG. 7A describes a medical device when used according to a second embodiment and an operation of the medical device.

"FIG. 7B describes the medical device when used according to the second embodiment and the operation of the medical device.

"FIG. 7C describes the medical device when used according to the second embodiment and the operation of the medical device.

"FIG. 8A is a perspective view showing a medical device in a third embodiment.

"FIG. 8B illustrates an operation of the medical device when used.

"FIG. 8C illustrates an operation of the medical device when used.

"FIG. 9A illustrates a modification of the applicator.

"FIG. 9B illustrates another modification of the applicator."

For additional information on this patent application, see: MIKKAICHI, Takayasu. Medical Device. Filed July 17, 2013 and posted February 6, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=1615&p=33&f=G&l=50&d=PG01&S1=20140130.PD.&OS=PD/20140130&RS=PD/20140130

Keywords for this news article include: Abscess, Therapy, Treatment, Suppuration, Olympus Medical Systems Corp..

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Source: Life Science Weekly


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