Patent ID: 7654963

Claim:
An indicator device for visually indicating a pressure of blood inside a blood vessel, comprising: a body comprising a passage passing through the body, the body further comprising a duct extending in the body and having a hemostatically sealed blood accommodating chamber; an insertion tube comprising a distal end adapted to be positioned inside the blood vessel and comprising a fluid communication pathway between an uncovered liquid inlet opening near a distal end of the insertion tube and the duct, wherein the inlet opening is formed on an outer surface of the insertion tube, the insertion tube further comprising an opening at an extreme end of the distal end portion; a window comprising an at least semi-transparent section configured to enable visual observation of blood entering into the duct via the inlet opening when the inlet opening is located inside the blood vessel; and an elongated member; wherein the fluid communication pathway is formed between the insertion tube and the elongated member; and wherein the body and the insertion tube are adapted to permit the elongated member to be threaded in a substantially straight path there through between the distal end of the insertion tube and a proximal end of the body and wherein an outer dimension of the elongated member is substantially equal to an inner dimension of the insertion tube at the distal end of the insertion tube and said outer dimension and said inner dimension are configured such that flow of blood between said outer dimension and said inner dimension is prevented when the elongated member is inserted into the insertion tube.