| CPC A61M 5/1411 (2013.01) [A61M 5/155 (2013.01); A61M 5/16813 (2013.01); A61M 5/16854 (2013.01); A61M 5/16881 (2013.01); A61M 39/24 (2013.01); A61M 2005/16863 (2013.01); A61M 2039/242 (2013.01); A61M 39/28 (2013.01); A61M 2205/18 (2013.01); A61M 2205/3344 (2013.01); A61M 2205/3379 (2013.01); A61M 2205/50 (2013.01)] | 10 Claims |
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1. A method of delivering a drug to a patient, the method comprising:
providing a drip chamber, the drip chamber having:
a proximal end coupled with a drug container and a distal end coupled with fluidic tubing that leads to a patient,
the drip chamber including a proximal check valve, the proximal check valve configured to prevent fluid flow in a proximal direction, the proximal check valve further configured to allow fluid flow in a distal direction when a cracking pressure threshold of the proximal check valve is overcome,
the drip chamber also including a distal check valve, the distal check valve configured to prevent fluid flow in the proximal direction, the distal check valve further configured to allow fluid flow in the distal direction when a cracking pressure threshold of the distal check valve is overcome, and
a pneumatic port pneumatically coupled with a pneumatic generator, the pneumatic port being between the proximal check valve and the distal check valve;
generating a negative pressure within the drip chamber using the pneumatic generator, the negative pressure sufficient to overcome the cracking pressure of the proximal check valve to move fluid from the drug container into the drip chamber.
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