Patient controlled medication infusion system
First Claim
1. A medication infusion system comprising:
- an infusion line for introducing medication to a peripheral vein of a patient;
pump means along the infusion line for delivering medication through the infusion to the peripheral vein of the patient;
pressure transducer means in fluid wave communication with medication in the infusion line for converting sensed fluid pressure waves to electrical signals;
amplifier means electrically connected to the pressure transducer means for increasing the strength of the electrical signal;
gain controlled amplifier means electrically connected to the amplifier means for maintaining the electrical signal at a predetermined amplitude regardless of the input amplitude variations of the electrical signal;
tracking filter means electrically connected to the gain controlled amplifier means for filtering the electrical signal provided by the pressure transducer means through the gain controlled amplifier means to provide an electrical signal representative of the patient'"'"'s respiration rate over a preselected full clinical respiration rate range;
a computer means operatively connected to the tracking filter means for deriving from the electrical signal a control signal for controlling the operation of the pump means which is operatively connected to the computer means, the computer means comprising;
means for determining the presence of an electrical signal representative of the patient'"'"'s respiration rate;
clock means for converting the electrical signal to a rate signal representative of the patient'"'"'s respiration rate;
first comparing means for comparing the rate signal with a preselected respiration rate;
storage means for storing each rate signal; and
incremental motor control means for providing a signal to the pump means for actuating the pump means in preselected increments when the rate signal is present and is greater than the preselected respiration rate and for providing a signal to the pump means to stop such pump means when no electrical signal is detected.
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0 Petitions
Accused Products
Abstract
A medication infusion system which includes an infusion line for introducing medication to a peripheral vein of a patient. The infusion system includes a pump for delivering the medication and a pressure transducer within the infusion line for converting sensed fluid pressure waves to electrical signals. An amplifier is provided within the system for increasing the strength of the electrical signal. A gain control amplifier is electrically connected within the system for maintaining the electrical signal at a predetermined amplitude regardless of input variations. A tracking filter is provided within the system to provide an electrical signal representative of the patient'"'"'s respiration rate over a preselected full clinical respiration rate range. A microprocessor is provided within the system for deriving from the electrical signal a control signal for controlling the operation of the pump. The microprocessor includes the ability to determine the presence or absence of the electrical signal representative of the patient'"'"'s respiration rate, a comparator for comparing the rate signal with a preselected respiration rate and a storage capability for storing the rates and preselected rate values. The system further includes a motor control for providing a signal to the pump for actuating the pump in preselected increments when directed by the microprocessor.
249 Citations
18 Claims
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1. A medication infusion system comprising:
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an infusion line for introducing medication to a peripheral vein of a patient; pump means along the infusion line for delivering medication through the infusion to the peripheral vein of the patient; pressure transducer means in fluid wave communication with medication in the infusion line for converting sensed fluid pressure waves to electrical signals; amplifier means electrically connected to the pressure transducer means for increasing the strength of the electrical signal; gain controlled amplifier means electrically connected to the amplifier means for maintaining the electrical signal at a predetermined amplitude regardless of the input amplitude variations of the electrical signal; tracking filter means electrically connected to the gain controlled amplifier means for filtering the electrical signal provided by the pressure transducer means through the gain controlled amplifier means to provide an electrical signal representative of the patient'"'"'s respiration rate over a preselected full clinical respiration rate range; a computer means operatively connected to the tracking filter means for deriving from the electrical signal a control signal for controlling the operation of the pump means which is operatively connected to the computer means, the computer means comprising; means for determining the presence of an electrical signal representative of the patient'"'"'s respiration rate; clock means for converting the electrical signal to a rate signal representative of the patient'"'"'s respiration rate; first comparing means for comparing the rate signal with a preselected respiration rate; storage means for storing each rate signal; and incremental motor control means for providing a signal to the pump means for actuating the pump means in preselected increments when the rate signal is present and is greater than the preselected respiration rate and for providing a signal to the pump means to stop such pump means when no electrical signal is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A medication infusion system comprising:
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an infusion line for introducing medication to a peripheral vein of a patient; pump means along the infusion line for delivering medication through the infusion line to the peripheral vein of the patient; pressure transducer means in fluid wave communication with medication in the infusion line for converting sensed fluid pressure waves to electrical signals; filter means electrically connected to the pressure transducer means for filtering the electrical signal provided by the pressure transducer means to provide an electrical signal representative of the patient'"'"'s respiration rate; an analog to digital converter means operatively connected to the filter means for producing digital monitor signals which are representative of the patient'"'"'s respiration rate; a computer means operatively connected to the analog to digital converter means for deriving from the digital monitor signals a control signal for controlling the operation of the pump means which is operatively connected to the computer means, the computer means comprising; means for determining the presence or absence of a signal; clock means for converting the digital monitor signal to a rate signal representative of the patient'"'"'s respiration rate; first comparing means for comparing the digital monitor signal with a preselected respiration rate; second comparing means for comparing the digital monitor signal with the unfiltered electrical signal; storage means for storing each digital monitor signal; third comparing means for comparing the digital monitor signal with an earlier digital monitor signal stored in such storage means; and incremental motor control means for providing a signal to the pump means for actuating the pump means in preselected increments. - View Dependent Claims (18)
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Specification