This disclosure describes, in part, a reel assembly configured to store and automatically retract flexible medical tubing. The reel assembly may include a constant torque spring configured to bias a rotational force on a spool. The spool may have clusters of teeth alternative with tooth-less areas. The reel assembly may also comprise a pawl with an internal spring configured to interact with the clusters of teeth and tooth-less areas in order to prevent/permit retracting a portion of fed medical tubing by the constant torque spring.
