Burette chamber for use with intravenous solution administration set

Claim 1

A burette chamber adapted to administer intravenous solution to a patient and selectively permit, during the administration of intravenous solution, the injection of medicament, comprising, in combination: an airtight container having a secondary compartment for dispensing intravenous solution, a primary compartment for automatically providing intravenous solution to the secondary compartment in response to the amount of fluid in said secondary compartment and a wall member separating said compartments; a first inlet connected to said container and communicating with said primary compartment; means for coupling said first inlet to a primary solution container; an injection site connected to said airtight container and communicating with the interior thereof for the injection of medicament into said airtight container; said wall member defining an opening for communication between said primary compartment and said secondary compartment; a tube connected to said inlet and extending downwardly therefrom to the lower portion of said primary compartment to permit the intravenous solution to be displaced up into the tube towards the primary solution container as medicament is injected through said injection site into the airtight container; and a drip chamber connected to said airtight container and forming an outlet therewith.

Claim 8

A method of administering an intravenous solution to a patient using an administration set which includes a burette chamber, a first inlet connected to said chamber, an injection site connected to said chamber, a drip chamber connected to said burette chamber and forming an outlet therewith, the improvement comprising the steps of: connecting an outlet tube to a patient; connecting a primary solution container containing primary solution to said first inlet; filling a first portion of the burette chamber separated from a second portion of said burette chamber with primary solution; permitting the primary solution to flow into said second portion until pressure equilibrium is reached, permitting flow of the primary solution through the said outlet to the patient; injecting medicament into the injection site to mix with the primary solution in said second portion; maintaining pressure equilibrium by reducing the level of the primary solution in the first portion with the primary solution being displaced up into said tube into said primary solution container; and permitting the flow of medicament and the primary solution mixture from said outlet to the patient.

Claim 9

A method of administering an intravenous solution to a patient using an administration set which includes a burette chamber, a first inlet connected to said chamber, an injection site connected to said chamber, a drip chamber connected to said burette chamber and forming an outlet therewith, the improvement comprising the steps of: connecting an outlet tube to a patient; connecting a primary solution container containing primary solution to said first inlet; filling a first portion of the burette chamber separated from a second portion of said burette chamber with primary solution; permitting the primary solution to flow into said second portion until pressure equilibrium is reached, permitting flow of the primary solution through the said outlet to the patient; injecting medicament into the injection site to mix with the primary solution in said second portion; maintaining pressure equilibrium by reducing the level of the primary solution in the first portion with the primary solution being displaced up into said tube into said primary solution container; and permitting the flow of medicament and the primary solution mixture from said outlet to the patient.