Patent ID: 8186384

Claim:
A medical injection circuit, comprising a flow control apparatus, a first tube, and a second tube, the flow control apparatus comprising: a tubular outside member having a first and a second opening; a tubular inside member having a first and second opening inserted in the outside member, and a valve member, wherein the first opening of the inside member and the first opening of the outside member are oriented in the same direction, the inside member further includes a through-hole passing through a side wall of the inside member in a thickness direction and a contact portion that is in contact with the outside member, which are arranged in that order in a direction from the first opening of the inside member to the second opening thereof, the valve member is placed in the second opening of the inside member, and passes only a fluid supplied at a set pressure or higher in a direction from the first opening of the inside member to the second opening thereof, the outside member is formed so as to be deformed elastically, thereby forming a gap communicating with the through-hole between the outside member and the contact portion, the gap forms a flow path of a fluid in combination with the through-hole, the first tube is connected to the first opening of the inside member, and the second tube is connected to the second opening of the outside member.