A direct visualization catheter comprising: a handle; a balloon; an elongate shaft having a proximal end and a distal end opposite the proximal end, the proximal end coupled to the handle, the distal end coupled to the balloon and defining a longitudinal axis; and a camera assembly coupled to the distal end of the elongate shaft and disposed within the balloon, the camera assembly including: a camera; and an adjustment mechanism for varying a configuration of the camera relative to the distal end of the elongate shaft between a delivery configuration and a deployed configuration, the camera facing primarily in a radial direction in the delivery configuration and the camera facing primarily in an axial direction in the deployed configuration, characterized in that the adjustment mechanism includes: a hinge coupling the camera to the distal end of the elongate shaft, the hinge configured to permit the camera to move relative to the distal end of the elongate shaft; a biasing element configured to apply a first force about the hinge; and a control element configured to apply a second force about the hinge opposite the first force. a handle; a balloon; an elongate shaft having a proximal end and a distal end opposite the proximal end, the proximal end coupled to the handle, the distal end coupled to the balloon and defining a longitudinal axis; and a camera assembly coupled to the distal end of the elongate shaft and disposed within the balloon, the camera assembly including: a camera; and an adjustment mechanism for varying a configuration of the camera relative to the distal end of the elongate shaft between a delivery configuration and a deployed configuration, the camera facing primarily in a radial direction in the delivery configuration and the camera facing primarily in an axial direction in the deployed configuration, characterized in that the adjustment mechanism includes: a hinge coupling the camera to the distal end of the elongate shaft, the hinge configured to permit the camera to move relative to the distal end of the elongate shaft; a biasing element configured to apply a first force about the hinge; and a control element configured to apply a second force about the hinge opposite the first force. a camera; and an adjustment mechanism for varying a configuration of the camera relative to the distal end of the elongate shaft between a delivery configuration and a deployed configuration, the camera facing primarily in a radial direction in the delivery configuration and the camera facing primarily in an axial direction in the deployed configuration, characterized in that the adjustment mechanism includes: a hinge coupling the camera to the distal end of the elongate shaft, the hinge configured to permit the camera to move relative to the distal end of the elongate shaft; a biasing element configured to apply a first force about the hinge; and a control element configured to apply a second force about the hinge opposite the first force. a hinge coupling the camera to the distal end of the elongate shaft, the hinge configured to permit the camera to move relative to the distal end of the elongate shaft; a biasing element configured to apply a first force about the hinge; and a control element configured to apply a second force about the hinge opposite the first force.