An intravascular probe comprising: a flexible elongate member configured to be introduced into a vasculature of a patient, the flexible elongate member having a proximal portion and a distal portion , the distal portion including a component thereon configured to detect a physiological condition of the patient when the flexible elongate member is in the vasculature of the patient, the flexible elongate member comprising a core wire and a communication pathway extending at least partially along the core wire, the communication pathway being in communication with the component and extending to the proximal portion; a communication element configured to communicate signals representative of the detected physiological condition to a system; and a connector junction non-rotatably and permanently secured to the proximal portion of the flexible elongate member, the connector junction being sized for grasping by a health care provider and for rotation to rotate the flexible elongate member when the flexible elongate member is in the vasculature of the patient, the connector junction connecting the communication pathway from the flexible elongate member to the communication element for conveying signals relating to the detected physiological condition to the system, wherein the connector junction includes a housing , a hollow chamber in the housing, the intravascular probe being characterised in that : a circuit board is disposed in the hollow chamber; and wherein the communication pathway is in electrical communication with the circuit board, and wherein the communication pathway is arranged to have a slack in the hollow chamber to accommodate flexing and bending of the communication pathway when the flexible elongate member is manipulated through a patient's vasculature. a flexible elongate member configured to be introduced into a vasculature of a patient, the flexible elongate member having a proximal portion and a distal portion , the distal portion including a component thereon configured to detect a physiological condition of the patient when the flexible elongate member is in the vasculature of the patient, the flexible elongate member comprising a core wire and a communication pathway extending at least partially along the core wire, the communication pathway being in communication with the component and extending to the proximal portion; a communication element configured to communicate signals representative of the detected physiological condition to a system; and a connector junction non-rotatably and permanently secured to the proximal portion of the flexible elongate member, the connector junction being sized for grasping by a health care provider and for rotation to rotate the flexible elongate member when the flexible elongate member is in the vasculature of the patient, the connector junction connecting the communication pathway from the flexible elongate member to the communication element for conveying signals relating to the detected physiological condition to the system, wherein the connector junction includes a housing , a hollow chamber in the housing, the intravascular probe being characterised in that : a circuit board is disposed in the hollow chamber; and wherein the communication pathway is in electrical communication with the circuit board, and wherein the communication pathway is arranged to have a slack in the hollow chamber to accommodate flexing and bending of the communication pathway when the flexible elongate member is manipulated through a patient's vasculature. a circuit board is disposed in the hollow chamber; and wherein the communication pathway is in electrical communication with the circuit board, and wherein the communication pathway is arranged to have a slack in the hollow chamber to accommodate flexing and bending of the communication pathway when the flexible elongate member is manipulated through a patient's vasculature. <EOS>