Control of fluid flow with internal cannula

A flow control device comprising:

• a valve body having an inlet, an outlet, a well with a central portion, a tubular cannula extending from the central portion toward the inlet, the tubular cannula having a first portion proximate the inlet and a bore having a first open end in the first portion and a second open end at the outlet for providing a passage for fluid to flow from the inlet to the outlet;
• a movable plug comprising a flexible body having a base sitting in the well of the valve body, a flexible head coupled to the flexible body and having a closed slit, the flexible head having a position sealing the inlet, the flexible head being depressible over the first portion of the tubular cannula from the position sealing the inlet, to open the slit;
• and
• the valve body further comprising a tapered bore extending from the inlet, the tapered bore being spaced from the movable plug such that when the flexible head of the movable plug is depressed over the first portion of the tubular cannula, the flexible head expands into the tapered bore.

A flow control device comprising:

• a valve body having an inlet and an outlet, the inlet having a circumferential end wall, the valve body further comprising a well and an upstanding tubular cannula extending from a central portion of the well, towards the inlet, the tubular cannula having a first portion proximate the inlet and a bore with a first open end in the first portion and a second open end at the outlet for providing a passage for fluid to flow from the inlet to the outlet;
• and
• a movable plug comprising a flexible head with a closed slit, the flexible head having a first position sealing the inlet, the flexible head being flush with the circumferential end wall of the inlet while in the first position, thereby facilitating antiseptic swabbing of the plug,
• the movable plug further comprising a flexible body coupled to the flexible head, the flexible body comprising elongated legs sitting in the well of the valve body, such that when the flexible head is moved to a second position over the first portion of the tubular cannula, the slit is opened, enabling the flow of fluid through the passage of the tubular cannula and the elongated legs are flexed, providing a return force for returning the flexible head to its first position.

A flow control device comprising:

• a valve body having an inlet and an outlet, the inlet having a circumferential end wall, the valve body having an exterior surface with at least one flat side for being positioned on the surface of a patient, the valve body further comprising an internal well and an upstanding tubular cannula extending from a central portion of the well, towards the inlet, the tubular cannula having a first portion proximate the inlet and a bore with a first open end in the first portion and a second open end at the outlet for providing a passage for fluid to flow from the inlet to the outlet;
• and
• a movable plug comprising a flexible head with a closed slit, the flexible head having a first position sealing the inlet, the flexible head being flush with the circumferential end wall of the inlet while in the first position, thereby facilitating antiseptic swabbing of the plug,
• the movable plug further comprising a flexible body coupled to the flexible head, such that when the flexible head is moved to a second position over the first portion of the tubular cannula, the slit is opened, enabling the flow of fluid through the passage of the tubular cannula and the flexible body is flexed, providing a return force for returning the flexible head to its first position.