Fluid path set bolus control device

A fluid path set for use with an injection device, the fluid path set comprising:

• a fluid inlet line;
• a fluid outlet line;
• and
• a bolus control device disposed between the fluid inlet line and the fluid outlet line, the bolus control device comprising:
• a valve body having a proximal end opposite a distal end, the valve body defining a fluid channel therethrough;
• a first connector at the proximal end in fluid connection with the fluid inlet line;
• a second connector at the distal end in fluid connection with the fluid outlet line;
• a compressible check valve disposed within the fluid channel between the proximal end and the distal end of the valve body, the compressible check valve having a body made from a reversibly compressible material and a closed proximal end, a distal end, and a plurality of transverse openings extending through the compressible check valve body between the closed proximal end of the compressible check valve body and the distal end of the compressible check valve body;
• and
• an adjustment mechanism configured to adjust an axial position of the first connector relative to the distal end of the compressible check valve body, wherein adjustment of the axial position of the first connector varies a compression of the compressible check valve,
• wherein the reversibly compressible material of the compressible check valve is reversibly compresses longitudinally between the proximal end of the valve body and the distal end of the valve body in response to fluid pressure within the fluid channel, and
• wherein movement of the adjustment mechanism increases or decreases a compression of the reversibly compressible material to increase or decrease a cracking pressure at which the compressible check valve opens to allow fluid flow around the compressible check valve body and through the fluid channel during a pressurized delivery of fluid through the valve body.

A bolus control device for use with an injection device, the bolus control device comprising:

• a valve body having a proximal end opposite a distal end, the valve body defining a fluid channel therethrough;
• a first connector at the proximal end configured for connecting to a fluid inlet line;
• a second connector at the distal end configured for connecting to a fluid outlet line;
• a compressible check valve disposed within the fluid channel between the proximal end of the valve body and the distal end of the valve body, the compressible check valve having a body made from a reversibly compressible material and a closed proximal end, a distal end, and a plurality of transverse openings extending through the compressible check valve body between the closed proximal end of the compressible check valve body and the distal end of the compressible check valve body;
• and
• an adjustment mechanism for varying a compression of the compressible check valve against the first connector, wherein the adjustment mechanism comprises an eccentric cam element and a rotatable valve stem associated with the distal end of the compressible check valve body,
• wherein the reversibly compressible material of the compressible check valve is reversibly compresses longitudinally between the proximal end of the valve body and the distal end of the valve body in response to fluid pressure within the fluid channel, and
• wherein movement of the adjustment mechanism increases or decreases a compression of the reversibly compressible material to increase or decrease a cracking pressure at which the compressible check valve opens to allow fluid flow around the compressible check valve body and through the fluid channel during a pressurized delivery of fluid through the valve body.