Abstract: A method for calibrating at least one solid-state sensor coupled to an elongate body comprising an expandable member is described herein. In some variations, the method may include advancing the expandable member to a target location in a blood vessel of a patient, injecting a calibration bolus into the expandable member, obtaining, using a controller, a first sensor data from an expandable member sensor, obtaining, using the controller, a second sensor data from the at least one solid-state sensor, and adjusting the second sensor data based on the first sensor data.

Abstract: Devices, systems, and methods for minimization of backlash in a syringe pump are described herein. Syringe pumps may comprise a syringe including a cylindrical body and a plunger, and a controller. The plunger may comprise a linear gear that may operably couple with a circular gear in the controller. The controller may be configured to bias the circular gear in a biasing rotational direction, thereby positioning the plunger to move towards a biasing translational direction. The methods may comprise determining a backlash compensation amount, determining a fluid transfer movement amount, moving at least one component of the syringe pump the backlash compensation amount and the fluid transfer movement amount in a first direction, and moving the at least one component of the syringe pump a biasing movement amount in a second direction opposite the first direction to re-engage the first gear and the second gear to minimize backlash.

Abstract: Methods for performing endovascular procedures are described herein. The methods may comprise advancing an expandable member of a blood flow control device to a target location in a blood vessel of a patient, and rotating a circular gear positioned at least partially within a housing of a controller via the controller communicably coupled to the blood flow control device. Rotating the circular gear may translate a linear gear of a syringe pump fluidly coupled to the expandable member thereby adjusting a volume of the expandable member. Various blood flow control devices, control systems, and fluid delivery systems are also described herein. The fluid delivery systems may include a pump configured for manual or automated delivery of fluids, or configured to switch between automated and manual modes of delivery. The pump may be a syringe pump that utilizes a rack and pinion system, a motor, and a sensor to track the position and/or movement of a component of the syringe pump during fluid transfer.