KR-20260066444-A - Device, method and program for tracking the tip of a nasogastric tube for determining the location of the nasogastric tube within the body

KR20260066444AKR 20260066444 AKR20260066444 AKR 20260066444AKR-20260066444-A

Abstract

The present disclosure relates to a nasogastric tube end position tracking device for confirming the position of a nasogastric tube within a body, comprising: a nasogastric tube inserted into the stomach through the esophagus of a patient and including a metal body at its end; and a sensor device that applies a magnetic field externally and determines the position of the nasogastric tube within the patient's body based on eddy currents generated from the metal body as the magnetic field is applied.

Inventors

이숙정

Assignees

가톨릭대학교 산학협력단

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (12)

A nasogastric tube inserted into the stomach through the patient's esophagus and including a metal body at the end; and A sensor device comprising applying a magnetic field from outside the body and determining the position of the nasogastric tube within the patient's body based on eddy currents generated from a metal body within the nasogastric tube as the magnetic field is applied. A device for determining the position of a nasogastric tube within the body.
In paragraph 1, The sensor device above is, A transmitting coil that applies a first magnetic field to the outside; and A magnetic field transmitting and receiving, comprising a receiving coil that measures a receiving current value based on a second magnetic field generated by an eddy current induced in the metal body by a first magnetic field applied from the transmitting coil. A device for determining the position of a nasogastric tube within the body.
In paragraph 2, The transmitting coil is characterized by being formed in a dish shape to concentrate the first magnetic field toward the center of the transmitting coil. A device for determining the position of a nasogastric tube within the body.
In paragraph 3, The sensor device above is, It further includes a communication module that communicates with a terminal, and The measured received current value is provided to the terminal through the communication module above, and The above terminal is, Calculate the depth of the metal body within the patient's body based on the received current value received from the sensor device, and Characterized by outputting information that guides the degree to which the nasogastric tube is inserted into the patient's body based on the depth of the metal body calculated above. A device for determining the position of a nasogastric tube within the body.
In paragraph 4, The above terminal is, Determining reception sensitivity based on the received reception current value above, and Based on the received sensitivity determined above, the location of the metal body within the patient's body is calculated, and Characterized by outputting information guiding the determined reception sensitivity and the degree to which the nasogastric tube is inserted into the patient's body. A device for determining the position of a nasogastric tube within the body.
In paragraph 3, The sensor device above is, Includes an output module, Calculate the depth of the metal body within the patient's body based on the above-mentioned measured received current value, and Characterized by outputting information that guides the degree to which the nasogastric tube is inserted into the patient's body based on the depth of the metal body calculated above. A device for determining the position of a nasogastric tube within the body.
In paragraph 6, The sensor device above is, Based on the above measured reception current value, the reception sensitivity is determined, and Based on the received sensitivity determined above, the location of the metal body within the patient's body is calculated, and Characterized by outputting information guiding the determined reception sensitivity and the degree to which the nasogastric tube is inserted into the patient's body. A device for determining the position of a nasogastric tube within the body.
In any one of paragraphs 4 through 7, The sensor device above is, Characterized by correcting the depth of the metal body within the patient's body calculated according to the type of metal body used in the above-mentioned nasogastric tube, A device for determining the position of a nasogastric tube within the body.
In paragraph 2, The sensor device above is, An input current of a preset strength is applied through the above-mentioned transmitting coil, and It is characterized by determining the intensity of the above-preset input current by taking into account the physical characteristics of the above-mentioned patient, and The above physical characteristics are, including at least one of abdominal circumference, abdominal obesity, spinal deformity, and insertion of metal material due to spinal surgery, A device for determining the position of a nasogastric tube within the body.
In Paragraph 9, The sensor device above is, An input current of a preset strength is applied through the above-mentioned transmitting coil, and Characterized by correcting the depth of the metal body and the received current value measured through the receiving coil based on the intensity of the input current. A device for determining the position of a nasogastric tube within the body.
A method for determining the position within a patient's body of a nasogastric tube that is inserted into the stomach through the patient's mouth and esophagus and includes a metal body at the tip, A step in which a sensor device applies a magnetic field outside the body; and A method comprising the step of determining the position of a nasogastric tube within the patient's body based on eddy currents generated from the metal body within the body as the magnetic field is applied. method.
A computer-readable recording medium on which a computer program for performing the method of paragraph 11 is recorded.

Description

Device, method and program for tracking the tip of a nasogastric tube for determining the location of the nasogastric tube within the body The present disclosure relates to a device for determining the position of a nasogastric tube within the body, and more specifically, to a device capable of tracking the position of the end of a nasogastric tube within the body. Generally, for patients with dysphagia who have difficulty eating orally due to various causes including central nervous system damage, severe dementia, and aspiration pneumonia, safe nutritional supply through the gastrointestinal tract is a critical issue directly related to life. The most widely used method for ensuring smooth nutrition for these patients with dysphagia is the insertion of a nasogastric tube (L-(Levine)tube or Naso-gastric tube, hereinafter referred to as a nasogastric tube), and nutrition is administered through the tube. However, problems often arise due to incorrect placement during nasogastric tube insertion; for example, incorrect insertion into the airway frequently leads to fatal complications such as aspiration pneumonia, sepsis, and death. Representative methods to confirm that a nasogastric tube is in a safe position after insertion include a direct method through a chest (or abdominal) X-ray performed within a medical institution, or an indirect method in which medical staff check bowel sounds using a stethoscope. However, given the reality that patients receiving nutrition via a nasogastric tube for several months or years cannot remain in the hospital at all times, a significant number of patients receive nutrition through the tube at home or in nursing homes. In such cases, it is difficult to verify the accuracy of tube insertion, leaving them constantly exposed to the risk of airway aspiration. Therefore, there is an urgent need for technology that can instantly, simply, and in real-time determine the position of a nasogastric tube inserted into a patient's body when the patient is not hospitalized or without X-ray imaging; however, such technology is not currently available. FIG. 1 is a schematic diagram of a system for determining the position of a nasogastric tube according to an embodiment of the present disclosure. FIGS. 2 and FIGS. 3 are drawings for explaining the shape of a nasogastric tube according to an embodiment of the present disclosure. FIG. 4 is a block diagram of a sensor device for tracking the position of a nasogastric tube end according to an embodiment of the present disclosure. FIG. 5 is a drawing illustrating a sensor device for tracking the position of the nasogastric tube end according to an embodiment of the present disclosure. FIG. 6 is a flowchart of a control method for a device for determining the position of a nasogastric tube according to an embodiment of the present disclosure. FIG. 7 is a block diagram of a terminal according to an embodiment of the present disclosure. FIG. 8 is a block diagram of a server according to an embodiment of the present disclosure. Figure 9 is a diagram illustrating a sensor device that detects the position of a nasogastric tube communicating with a terminal. Figure 10 is a diagram illustrating a depth correction curve according to a metal body used in a nasogastric tube. Throughout this disclosure, the same reference numerals denote the same components. This disclosure does not describe all elements of the embodiments, and general content in the art to which this disclosure pertains or content that overlaps between embodiments is omitted. The terms ‘part, module, component, block’ as used in the specification may be implemented in software or hardware, and depending on the embodiments, a plurality of ‘parts, modules, components, blocks’ may be implemented as a single component, or a single ‘part, module, component, block’ may include a plurality of components. Throughout the specification, when a part is described as being "connected" to another part, this includes not only cases where they are directly connected but also cases where they are indirectly connected, and indirect connections include connections made via a wireless communication network. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Throughout the specification, when it is stated that a component is located "on" another component, this includes not only cases where a component is in contact with another component, but also cases where another component exists between the two components. Terms such as "first," "second," etc., are used to distinguish one component from another, and the components are not limited by the aforementioned terms. Singular expressions include plural expressions unless there is an obvious exception in the context. In each step, identification codes are used for convenience of explanation and do not describe