Medical port with constraining biasing element

A medical port for transferring fluid to/from a patient, the medical port having an open mode to permit fluid flow and a closed mode to prevent fluid flow, the medical port comprising:

• a housing forming an interior having a fluid inlet and a fluid channel extending from the fluid inlet, the housing also having an exterior;
• a resilient valve element within the housing interior configured to control fluid flow through the inlet, the resilient valve element having a radially unconstrained valve portion when in the closed mode;
• and
• a biasing element movably couplable with the housing exterior, the biasing element having at least one constraining portion configured to contact at least a given portion of the radially unconstrained valve portion when the biasing element is coupled with the housing exterior, the at least one constraining portion configured to normally resist radial outward movement of at least the given portion of the radially unconstrained valve portion when the biasing element is coupled with the housing exterior, the biasing element also configured to be decoupled with the housing exterior prior to the medical port being transitioned from the closed mode to the open mode.