Devices and methods to measure gastric residual volume
Inventors
BURNETT, Daniel R. • HAMILTON, Marcie • Luxon, Evan S. • Vergara, Alexander • SUTARIA, Saheel
Assignees
Interested in licensing this patent?
MTEC can help explore whether this patent might be available for licensing for your application.
Publication Number
US-12109036-B2
Publication Date
2024-10-08
Expiration Date
Abstract
Devices and methods to measure gastric residual volume (GRV) are described where at least one additive component (a GRV indicator) may be dispersed in a body lumen such as a stomach. The GRV indicator may changes a physical (chemical, electrical, thermal, mechanical, optical, etc.) characteristic within the stomach by a measureable degree. This degree of change and/or the rate of return to the previous state, may be used to determine the GRV of a patient. The determined GRV can also be used to automatically or semi-automatically control the patient's feeding rate and/or volume and/or frequency to adequately nourish the patient but avoid complications. The physical characteristic(s) may also be used to detect that the feeding catheter or tube is in the correct location (ie stomach vs lung or esophagus.
Core Innovation
The invention relates to determining a gastric residual volume (GRV) using one or more GRV sensors positioned along an elongate body. The GRV sensors measure a change in a GRV parameter when positioned within a body lumen of a subject, and a controller determines GRV based on the change in the GRV parameter.
The invention further introduces one or more placement sensors positioned along the elongate body to confirm location within the subject during use. The placement sensors measure a change in a first physiological parameter and in a second physiological parameter when positioned within the body lumen, where the first and second physiological parameters comprise conductivity or impedance and temperature.
In additional embodiments, the invention senses a GRV parameter from a medium having one or more GRV indicators within the body lumen via the GRV sensors. The method monitors the one or more GRV indicators for a change in the GRV parameter and determines a GRV based on the change in the GRV parameter.
Claims Coverage
The partial content includes two independent claims: an apparatus claim and a method claim. The independent claims share the inventive core of GRV determination based on sensor-measured changes in GRV-related parameters using GRV sensors positioned along an elongate body, with placement/location confirmation using physiological parameter changes comprising conductivity or impedance and temperature.
GRV sensing along an elongate body
An apparatus comprising an elongate body having a length with one or more GRV sensors positioned along the elongate body, wherein the one or more GRV sensors are configured to measure a change in a GRV parameter when positioned within a body lumen of a subject.
Placement confirmation using conductivity/impedance and temperature
One or more placement sensors positioned along the elongate body, wherein the one or more placement sensors are configured to measure a change in a first physiological parameter and in a second physiological parameter when positioned within the body lumen, wherein the first and second physiological parameters comprise conductivity or impedance, and temperature.
Controller-based determination of GRV and confirmation of location
A controller in communication with the one or more GRV sensors and the one or more placement sensors, wherein the controller is configured to determine a GRV based on the change in the GRV parameter, and wherein the controller is further configured to confirm a location of the elongate body within the subject during use based upon the change in the physiological parameter.
Physiological parameter sensing for location confirmation before GRV determination
A method comprising measuring a change in a first physiological parameter and in a second physiological parameter within the body lumen via one or more placement sensors positioned along an elongate body, wherein the first and second physiological parameters comprise conductivity or impedance, and temperature; confirming a location of the elongate body within the body lumen based upon the change in the first or second physiological parameter.
Sensing GRV indicators in a medium and determining GRV from changes
The method includes sensing a GRV parameter from a medium having one or more GRV indicators within the body lumen via one or more GRV sensors positioned along the elongate body; monitoring the one or more GRV indicators for a change in the GRV parameter; and determining a GRV of the body lumen based on the change in the GRV parameter.
Across the independent claims, GRV is determined from changes measured by one or more GRV sensors positioned along an elongate body, while placement/location is confirmed using physiological parameter changes comprising conductivity or impedance and temperature. In the method, GRV determination includes monitoring GRV indicator changes in a medium within the body lumen and calculating GRV based on the sensed change in the GRV parameter.
Stated Advantages
Documented Applications
No documented applications found
Interested in licensing this patent?