The University of Tokyo

Transell Co., Ltd.

Samsung Electronics Co., Ltd.

Ken Masamune

Shuji Nakamura

Akihiro Nabeshima

Kohei Miki

Katsuyuki Sado

Hirokazu Takagawa

Fumiya Iwashima

Siyang Zuo

Noriaki Yamanaka

Takahiro Tokumiya

Takeyoshi Dohi

Kazuo Iijima

Kiyoshi Matsumiya

The present invention provide a puncture instrument capable of administering (supplying) a drug solution. The puncture instrument includes a puncture tip section (); a first tubular body () connected to the puncture tip section () at the distal end; and an outer tubular body () at least partially covering the first tubular body (). The first tubular body () is formed to be rotatable around an axis along the longitudinal direction. The first tubular body () has an outer diameter smaller than an inner diameter of the outer tubular body (). A drug solution supply path () is provided on the outside of the first tubular body ().

Puncturing instrument and puncturing device

Puncture instrument and puncture device

A medical tube which is highly flexible and has a very small diameter and a flexibility-variable mechanism having the medical tube are provided. The medical tube includes an interior tube and a plurality of annular segments of a cylindrical shape into which the interior tube is inserted. The medical tube is configured by sequentially connecting the plurality of annular segments while the interior tube is inserted inside of the plurality of annular segments. Each annular segment includes a fitting portion that allows any other annular segment to be fitted to the annular segment, and a fitted portion which may be fitted on the fitting portion of any other annular segment, which has a diameter that increases toward an end of the annular segment and includes at least one slit extending in a direction crossing a diametric direction. When the spacing of the slit is narrowed, the fitting portion of the annular segment and the fitted portion of any other annular segment are engaged with each other so that the annular segments are fixed to each other.

Medical tube and flexibility-variable mechanism with the same

There is provided a flexibility/rigidity adjustable apparatus which can change over its state between a flexible state in which such apparatus is freely bendable and a rigid state in which such bending is restricted when in use. A flexible closing coverwhich can expand/shrink is provided on an outer circumferenceof a flexible tube. A latching memberwhich moves together with the closing coveris provided, and a latching-member receiving partwith which the latching membercan engage is provided at the outer circumferenceof the tube. A closed spaceformed between the closing coverand the tubeis connected to an air inlet/outlet part. As the air is evacuated through the inlet/outlet partto change the pressurized condition of the closed spacefrom an atmospheric pressure condition to a negative pressure condition, the closing coverreduces its diameter around an axis, and the latching memberis caused to engage with the latching-member receiving part. As air is supplied in the closed spaceto make the interior thereof in an atmospheric pressure condition, the closing coverexpands, and engagement of latching memberwith the latching-member receiving partis released, so that the tubebecomes a flexible state from a rigid state.

Flexibility/rigidity adjustable apparatus

Growing community of inventors

Tokyo, Japan

Ken Masamune