Nikkiso Company Limited

Yoshihisa Matsunaga

Tatsuo Igarashi

Takuro Ishii

The present invention provides an operation field-securing device that secures an operation field by being deployed within the body cavity. The operation field-securing device includes at least three elongated parts extending radially in a deployed state; and curved parts, the number of which is the same as that of the elongated parts. Each pair of the two adjacent elongated parts is connected at their one ends by the curved part. Each of the curved parts is convex toward a side opposite to the elongated part. In the deployed state, the curved parts are arranged circumferentially. By deforming the curved parts, the operation field-securing device is capable of being brought into either one of a contracted state where a distance between the adjacent elongated parts is shortened by making the elongated parts close to each other and the deployed state where the distance between the elongated parts is expanded.

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Chiba, Japan

Yoshihisa Matsunaga