Surgical instrument, medical tool set, and movement method

A medical instrument set comprising a surgical instrument, comprising

• a shaft extending in a first direction,
• an inclined part extending from a tip of the shaft in a second direction, and
• a cutting tool for use in cutting a coracoid process,
• wherein
• the second direction, in which the inclined part extends, is inclined at an angle in a range of 95° or more and 115° or less to the first direction, in which the shaft extends, and
• the inclined part includes on an outer edge a notch through which a screw is passed,
• the shaft includes a shaft body and a grip for use as a handle, the grip being connected to the shaft body at a proximal end of the shaft body,
• the inclined part extends from a tip of the shaft body in the second direction,
• the shaft body present between the grip and the inclined part has a length of 8 cm or more and 12 cm or less,
• the cutting tool includes a thick-walled portion for use as a handle and a thin-walled portion with a thickness smaller than that of the thick-walled portion, and the thick-walled portion and the thin-walled portion are continuous,
• a tip of the thin-walled portion farthest from the thick-walled portion has a thinnest blade edge;
• and
• the thin-walled portion has a length of 6 cm or more and 8 cm or less.

A medical instrument set comprising a surgical instrument, comprising

• a shaft extending in a first direction, and
• an inclined part extending from a tip of the shaft in a second direction,
• wherein
• the second direction, in which the inclined part extends, is inclined at an angle in a range of 95° or more and 115° or less to the first direction, in which the shaft extends, and
• the inclined part includes on an outer edge a notch through which a screw is passed,
• a first wire,
• a second wire,
• a third wire, and
• a first sleeve,
• wherein
• the first wire, the second wire, the third wire, and the first sleeve are each passable through the notch of the surgical instrument;
• the first wire is a hollow cylinder, the third wire is insertable into a cavity of the first wire, and the first wire includes a spirally extending groove on an outer circumference of a tip portion of the first wire;
• the second wire has a round-shaped tip portion;
• the third wire has an angular tapered tip portion;
• and
• the first sleeve is a hollow cylinder, and the first wire, the second wire, and the third wire are each insertable into a cavity of the first sleeve.

A medical instrument set comprising a surgical instrument, comprising

• a shaft extending in a first direction, and
• an inclined part extending from a tip of the shaft in a second direction,
• wherein
• the second direction, in which the inclined part extends, is inclined at an angle in a range of 95° or more and 115° or less to the first direction, in which the shaft extends, and
• the inclined part includes on an outer edge a notch through which a screw is passed,
• an abrasive tool,
• a second sleeve,
• a third sleeve,
• a fourth sleeve,
• a fourth wire, and
• a fifth wire,
• wherein
• the second sleeve, the third sleeve, the fourth sleeve, and the abrasive tool are each a hollow cylinder;
• the third sleeve is insertable into a cavity of the second sleeve, the fourth sleeve is insertable into a cavity of the third sleeve, the fourth wire or the fifth wire is insertable into a cavity of the fourth sleeve, and the abrasive tool is insertable into a cavity of the second sleeve;
• the fourth wire is insertable into a cavity of the abrasive tool and the cavity of the fourth sleeve, and the fourth wire includes a round-shaped tip portion;
• the fifth wire is insertable into the cavity of the abrasive tool, the cavity of the fourth sleeve, and the notch of the surgical instrument, and the fifth wire has an angular tapered tip portion;
• and
• the abrasive tool is configured to rotate about a central axis in response to activation of a power tool with the abrasive tool connected at a proximal end to the power tool, and rotation of the abrasive tool with a tip surface of the abrasive tool being in contact with a surface of a scapular neck allows the tip surface of the abrasive tool to grind the surface of the scapular neck.

A method for transplanting a coracoid process to a scapular neck by using a surgical instrument, comprising

• a shaft extending in a first direction, and
• an inclined part extending from a tip of the shaft in a second direction,
• wherein
• the second direction, in which the inclined part extends, is inclined at an angle in a range of 95° or more and 115° or less to the first direction, in which the shaft extends, and
• the inclined part includes on an outer edge a notch through which a screw is passed,
• the method comprising
• a first step of forming an incision in a subscapularis in the vicinity of the scapular neck,
• a second step of inserting the surgical instrument into a body through a first portal formed on skin at a position directly above the scapular neck to bring the inclined part into contact with the coracoid process;
• a third step of passing a first screw through the notch of the inclined part, and screwing the first screw into the coracoid process to fasten the inclined part to the coracoid process with the first screw, the first screw being inserted into the body through the first portal;
• a fourth step of cutting the coracoid process off a scapula with a bone chisel inserted from the first portal with a common tendon attached to the coracoid process;
• a fifth step of moving the surgical instrument downward to move the coracoid process downward, thereby placing the coracoid process in the incision to bring the coracoid process into proximity with the scapular neck;
• a sixth step of unscrewing the first screw from the coracoid process to withdraw the first screw through a second portal formed on the skin at a position in front of the incision while inserting a second screw longer than the first screw into the body through the second portal to screw the second screw into the coracoid process and the scapular neck with the second screw passing through the notch;
• and
• a seventh step of moving the surgical instrument to release the surgical instrument from the second screw to withdraw the surgical instrument from the body through the first portal.