Autoinfuser for resuscitation and method of infusion fluid injection
First Claim
1. An apparatus for injecting infusion fluids into a patient at a controlled infusion rate, comprising:
- a. a pressurized infuser comprising a pressure container having a known initial volume, Vi, and a known initial pressure, Pi, a flexible infusion fluid bag having volume Vf, contained within said pressure container, an infusion fluid outlet port in fluid communication with said bag, a pressure sensor located within said container and capable of measuring container pressure and emitting a process signal indicative of measured container pressure, Pm ;
b. a flow control valve comprising a valve inlet and a valve outlet, said inlet being in fluid communication with said infusion fluid outlet port;
c. a valve controller coupled to said valve to control the position of said valve in response to a control signal, said controller comprising a control signal receiver, andd. a programmable computer coupled to receive at least one signal from said pressure sensor indicative of container pressure, said computer having a memory comprising stored values for Vi Pi, infusion time period, K6, a target infusion rate, TIR, and said computer further comprising algorithms derived from ideal gas laws, said computer being capable of generating a control signal based upon said pressure sensor signal and said stored values, said computer further being capable of sending a control signal based upon said control instruction to said control signal receiver.
5 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to an apparatus for injecting infusion fluids into a patient at a controlled infusion rate. This apparatus is referred to as a "controlled autoinfuser". A preferred embodiment of the invention comprises a computer capable of using pressure volume and relationships to generate a control signal that will control the injection of infusion fluids into a patient. The present invention further comprises a method of controlling the injection of infusion fluids into a patient through the use of a microprocessor controlled autoinfuser as well as a method of injecting a preselected volume of infusion fluid into a patient within a preselected infusion time.
-
Citations
13 Claims
-
1. An apparatus for injecting infusion fluids into a patient at a controlled infusion rate, comprising:
-
a. a pressurized infuser comprising a pressure container having a known initial volume, Vi, and a known initial pressure, Pi, a flexible infusion fluid bag having volume Vf, contained within said pressure container, an infusion fluid outlet port in fluid communication with said bag, a pressure sensor located within said container and capable of measuring container pressure and emitting a process signal indicative of measured container pressure, Pm ; b. a flow control valve comprising a valve inlet and a valve outlet, said inlet being in fluid communication with said infusion fluid outlet port; c. a valve controller coupled to said valve to control the position of said valve in response to a control signal, said controller comprising a control signal receiver, and d. a programmable computer coupled to receive at least one signal from said pressure sensor indicative of container pressure, said computer having a memory comprising stored values for Vi Pi, infusion time period, K6, a target infusion rate, TIR, and said computer further comprising algorithms derived from ideal gas laws, said computer being capable of generating a control signal based upon said pressure sensor signal and said stored values, said computer further being capable of sending a control signal based upon said control instruction to said control signal receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An apparatus for injecting infusion fluids into a patient at a controlled infusion rate, comprising:
-
a. a pressurized infuser comprising a pressure container having a known initial volume, Vi, and a known initial pressure, Pi, a flexible infusion fluid bag having volume Vf, contained within said pressure container, an infusion fluid outlet port in fluid communication with said bag, a pressure sensor located within said container and capable of measuring container pressure and emitting a process signal indicative of measured container pressure, Pm ; b. a flow control valve comprising a valve inlet and a valve outlet, said inlet being in fluid communication with said outlet infusion fluid port; c. a valve controller coupled to said valve to control the position of said valve in response to a control signal, said controller comprising a control signal receiver; d. a physiological sensor attachable to a patient and capable of measuring a physiological parameter, and transmitting a signal indicative of said measured physiological parameter MPP; and e. a programmable computer electrically coupled to receive input signals from said pressure sensor and said physiological sensor, indicative of container pressure and said measured physiological parameter, respectively, said computer further comprising a memory comprising stored values for Vi, Pi, infusion time period K6, and a target physiological parameter value, TPP, and further comprising algorithms derived from combined gas laws, said algorithms being capable of comparing said target physiological parameter to said measured physiological parameter and further capable of generating at least one control instruction based upon said parameter comparison and further based upon said pressure sensor signal and values stored in memory, said computer further being capable of sending a control signal, based upon said control instruction, to said control signal receiver. - View Dependent Claims (10, 11, 12, 13)
-
Specification