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US 12,004,794 B2Granted
Active pressure control and method of fault monitoring
AssigneeMedtronic CryoCath LP
InventorScott A. Hareland
Life of this patent
Estimating the term…
Abstract
A medical system for monitoring pressure may comprise a medical device with an expandable element, at least one pressure sensor in communication with the expandable element and a control unit. The control unit may include a fluid source in fluid communication with the expandable element and circulation of the fluid within the expandable element may inflate the expandable element. A processing circuitry may be configured to monitor a pressure within the expandable element based on signals received from the at least one pressure sensor for a first period of time and circulation of the fluid within the expandable element for a second period of time.
Claims18
A medical system for monitoring pressure, the system comprising:
- a medical device, including:
- an expandable element;
- a pressure sensor in communication with the expandable element;
- and
- a control unit including:
- a fluid source in fluid communication with the expandable element, circulation of the fluid within the expandable element inflates the expandable element;
- and
- processing circuitry configured to alternate between an active pressure control phase and a leakage monitoring and detection phase,
- wherein the active pressure control phase includes for a first time period, circulating the fluid within the expandable element according to a predetermined target pressure,
- wherein the leakage monitoring and detection phase incudes monitoring a pressure within the expandable element based on signals received from the pressure sensor for a second period of time, wherein
- when a pressure change in the expandable element does not exceed a predetermined threshold during the leakage monitoring and detection phase, the processing circuitry repeats the active pressure control phase,
- when the pressure change in the expandable element exceeds the predetermined threshold during the leakage monitoring and detection phase, the processing circuitry signals a fault condition and discontinues active pressure control phase, and
- the fault condition provides a notification to a user device including at least one selected form the group consisting of an audible alert and a tactile alert.
10 more elements
A medical system for monitoring pressure, the system comprising:
- a medical device, including:
- an expandable element;
- and
- a control unit including:
- a fluid source in fluid communication with the expandable element, circulation of the fluid within the expandable element inflating the expandable element to a preset pressure range, once a pressure of the expandable element is within the preset pressure range, the fluid source provides preset periodic inflation pulses to the expandable element to maintain the preset pressure range;
- and
- processing circuitry configured to
- periodically monitor at least one selected from the group consisting of a duration and a frequency of the preset periodic inflation pulses to determine any changes to at least one selected from the group consisting of the frequency and the duration of the preset periodic inflation pulses,
- when a pressure in the expandable element falls below a threshold pressure, discontinue providing the preset periodic inflation pulses to the expandable element and signal a fault condition,
- wherein the fault condition provides a notification to a user device including at least one selected form the group consisting of an audible alert and a tactile alert.
7 more elements
A medical system for monitoring pressure, the system comprising:
- a medical device, including:
- an expandable element;
- a pressure sensor in communication with the expandable element;
- and
- a control unit configured to operate in a first mode and a second mode:
- the first mode includes circulating a fluid through the expandable element causing the expandable element to inflate for a first period of time and monitoring, with processing circuitry, a pressure within the expandable element based on signals received from the pressure sensor for a second period of time;
- and
- the second mode includes:
- circulating the fluid within the expandable element in order to inflate the expandable element to a preset pressure range,
- providing, with a fluid source, preset periodic inflation pulses to the expandable element,
- periodically monitoring the preset periodic inflation pulses to the expandable element,
- determining any changes to at least one selected from the group consisting of a frequency and a duration of the preset period inflation pulses, and
- signaling a fault condition and discontinuing providing the preset periodic inflation pulses to the expandable element when the pressure in the expandable element exceeds or falls below the preset pressure range,
- wherein the fault condition provides a notification to a user device including at least one selected form the group consisting of an audible alert and a tactile alert.
11 more elements
Dependencies are inferred from the claim text.