Retractor for small-incision endoscopic surgery

A retractor for small-incision endoscopic surgery, the retractor holding a surgical incision made in a body during the surgery in an opened state to ensure a surgical field in the small-incision endoscopic surgery, the retractor comprising:

• a base body that is a thin plate made of tin having a purity of not less than 99.9%, and has an elongated rectangular shape in an extended state of the base body, wherein the base body does not include a window;
• a width of the base body is selected in a range of 1 to 5 cm and a length of the base body is selected in a range of 3 to 20 cm, in accordance with a size required for a use place, in a state that the base body is extended into a rectangular shape, in order to hold the surgical incision in an opened state;
• and then a thickness of the base body is selected in a range of 0.5 to 2 mm, in order to ensure flexural rigidity necessary for the use place, and
• a fixing means configured to fix a leading end portion of a surgical hook to the base body, wherein
• the retractor is inserted from a small incision wound into the body, with the base body being extended into a rectangular shape, or being rounded into a small shape, in a state that the leading end portion of the surgical hook is fixed to the base body by the fixing means to hold the retractor by the surgical hook, and
• the retractor is delivered to the surgical incision in the body by the surgical hook, and is used in a state that the base body is bent and deformed into a desired form by a surgical instrument used in the small-incision endoscopic surgery, and is applied to the surgical incision.