Infusion system and method of use which prevents over-saturation of an analog-to-digital converter
First Claim
1. An infusion system configured to improve detection of air in a fluid delivery line, the infusion system comprising:
- a sensor configured to detect a first signal transmitted in a fluid delivery line;
an analog-to-digital converter electronically connected to the sensor, the analog-to-digital converter configured to convert the detected signal from analog to digital;
a hardware processor connected with the analog-to-digital converter, the hardware processor configured to;
determine that the detected first signal is saturated;
change an operating frequency of the sensor based on the determination of saturation;
transmit a second signal at the changed operating frequency; and
determine air in the fluid delivery line based on the transmitted second signal.
1 Assignment
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Accused Products
Abstract
To detect air in a fluid delivery line of an infusion system, infusion fluid is pumped through a fluid delivery line adjacent to at least one sensor. A signal is transmitted and received using the at least one sensor into and from the fluid delivery line. The at least one sensor is operated, using at least one processor, at a modified frequency which is different than a resonant frequency of the at least one sensor to reduce an amplitude of an output of the signal transmitted from the at least one sensor to a level which is lower than a saturation level of the analog-to-digital converter to avoid over-saturating the analog-to-digital converter. The signal received by the at least one sensor is converted from analog to digital using an analog-to-digital converter. The at least one processor determines whether air is in the fluid delivery line based on the converted digital signal.
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Citations
18 Claims
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1. An infusion system configured to improve detection of air in a fluid delivery line, the infusion system comprising:
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a sensor configured to detect a first signal transmitted in a fluid delivery line; an analog-to-digital converter electronically connected to the sensor, the analog-to-digital converter configured to convert the detected signal from analog to digital; a hardware processor connected with the analog-to-digital converter, the hardware processor configured to; determine that the detected first signal is saturated; change an operating frequency of the sensor based on the determination of saturation; transmit a second signal at the changed operating frequency; and determine air in the fluid delivery line based on the transmitted second signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An method of improving detection of air in a fluid delivery line, the method comprising:
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detecting a first signal transmitted in a fluid delivery line; converting the detected signal from analog to digital; determining that the detected first signal is saturated; changing an operating frequency of the sensor based on the determination of saturation; transmitting a second signal at the changed operating frequency; and determining air in the fluid delivery line based on the transmitted second signal. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An infusion system configured to improve detection of air in a fluid delivery line, the infusion system comprising one or more hardware processors configured to:
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receive a first digital signal corresponding to a first signal detected by a sensor, wherein the first signal is responsive to a transmitted signal in a fluid delivery line; determine that the first digital signal is saturated; change an operating frequency of the sensor based on the determination of saturation; transmit a second signal at the changed operating frequency; and determine air in the fluid delivery line based on the transmitted second signal. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification