A mold for placing a nasoenteral tube under simulated real-time ultrasound guidance

Abstract

The utility model discloses a mould is placed under the mould of simulation ultrasonic real -time guidance of nasal -intestinal tube, including the digestive tract simulation body of simulation esophagus, stomach, duodenum and jejunum, it adopts the flexible material of ultrasonic wave penetration, front surface is not transparent, back surface is transparent, and its inside esophagus is used for filling air, and the part except esophagus is used for filling liquid, the digestive tract simulation body is fixed between two organic glass, front surface is not transparent, back surface is transparent, the organic glass of front surface opens at esophagus place, antrum gastricum place respectively, as the acoustic window of ultrasonic, is used for the inflation sign of esophagus and antrum gastricum nasal -intestinal tube catheter tip cloud sign of ultrasonic observation when placing nasal -intestinal tube respectively, is provided with many resistance positions at stomach and duodenum, for making nasal -intestinal tube catheter tip forward into the obstruction. The utility model can simulate the sign of ultrasonic under different conditions on the mould, effectively simulates the actual entering process of nasal -intestinal tube under the real -time guidance of ultrasonic, and facilitates simulation teaching demonstration.

Description

Technical Field

[0001] This utility model relates to the field of medical assistive devices, and in particular to a mold for placing a nasoenteric tube under simulated real-time ultrasound guidance. Background Technology

[0002] Critically ill patients often require the placement of nasoenteric tubes due to their condition. Traditional placement methods include blind placement, interventional procedures, electromagnetic navigation, and gastroscopy. In recent years, with the application of critical care ultrasound, ultrasound-guided placement of nasoenteric tubes has begun. To ensure that doctors are proficient in this method, simulation demonstrations using mannequins are necessary.

[0003] Currently, there are many different types of anatomical models available, but none are suitable for simulating the ultrasound-guided placement of nasoenteric tubes. Additionally, while there are models for blind placement of nasoenteric tubes, they cannot simulate the dynamic ultrasound demonstrations (covering various scenarios in real-world applications). Furthermore, the applicant has attempted to use intestinal casings as a simulation, but the realism of the operation was poor, and it could not simulate the actual insertion of the nasoenteric tube.

[0004] Therefore, creating a mold that can effectively simulate the placement of a nasoenteric tube under real-time ultrasound guidance has become a goal that the industry urgently needs to improve. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a mold for simulating the placement of a nasoenteric tube under real-time ultrasound guidance, so that it can effectively simulate the actual entry process of the nasoenteric tube under real-time ultrasound guidance, which facilitates simulation teaching demonstrations and overcomes the shortcomings of existing technologies.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A mold simulating real-time ultrasound-guided placement of a nasoenteric tube includes a digestive tract simulator simulating the esophagus, stomach, duodenum, and jejunum. The digestive tract simulator is made of a flexible material that can transmit ultrasound waves, with an opaque front and a transparent back. The esophagus inside the simulator is filled with air, while the rest of the simulator is filled with liquid. The simulator is fixed between two layers of acrylic glass, with the front layer opaque and the back layer transparent. The front acrylic glass has openings at the esophagus and the gastric antrum, serving as ultrasound windows for observing the air insufflation sign in the esophagus and the clouding sign at the tip of the nasoenteric tube in the gastric antrum during placement. Multiple resistance points are provided at the stomach and duodenum to obstruct the forward entry of the nasoenteric tube tip.

[0008] As a further improvement of this utility model, the resistance points at the stomach and duodenum are: openings provided on the back of the plexiglass corresponding to the positions of the stomach and duodenum, the openings providing a channel for external manual pressing of the tip of the nasoenteric tube to obstruct its entry; or, recesses provided on the inner walls of the stomach and duodenum.

[0009] Furthermore, an opening is provided in the lower part of the stomach body, the descending part of the duodenum, the horizontal part of the duodenum, and the ascending part of the duodenum; or, a depression is provided in the inner wall of the lower part of the stomach body, the descending part of the duodenum, the horizontal part of the duodenum, and the ascending part of the duodenum.

[0010] Furthermore, the digestive tract simulator is made of silicone or plastic.

[0011] Furthermore, the digestive tract simulator is made of two layers of material with the same shape stacked together, with the side and bottom edges bonded together respectively.

[0012] Furthermore, in the digestive tract simulator, the stomach body is attached to two layers of plexiglass, and the esophagus, duodenum, and jejunum are fixed between the two layers of plexiglass by auxiliary fasteners.

[0013] Furthermore, the esophagus is filled with air, and the liquid filling the portion other than the esophagus is water or rice paste.

[0014] Furthermore, the digestive tract simulator is designed with reference to the actual size of the human body.

[0015] Furthermore, the opening at the esophagus is rectangular, with a size of 4*2cm; the opening at the gastric antrum is rectangular, with a size of 7*3cm.

[0016] Furthermore, the opening at the esophagus is located in the upper part of the esophagus.

[0017] By adopting the above technical solution, this utility model has at least the following advantages:

[0018] 1. This invention employs a digestive tract simulator fixed between two layers of plexiglass, representing the pathways of the esophagus, stomach, duodenum, and jejunum. Openings at the esophagus and gastric antrum on the front of the plexiglass serve as ultrasound windows, allowing for ultrasound observation of the esophageal inflation sign and the nasoenteric tube tip clouding sign during nasoenteric tube placement. This enables ultrasound observation at crucial points in the ultrasound-guided procedure. Simultaneously, multiple resistance points are incorporated at the stomach and duodenum to simulate obstruction of the nasoenteric tube tip's advance. This simulator allows for the simulation of the entire process of ultrasound-guided nasoenteric tube placement, and the ultrasound signs under different conditions can be simulated on the simulator, aiding teaching and facilitating simulated teaching demonstrations. The learner operates the ultrasound instrument, while the teacher operates the nasoenteric tube, creating obstructions at different points behind it. The learner then uses ultrasound to determine the position of the nasoenteric tube.

[0019] 2. The mold of this utility model is opaque on the front and transparent on the back. The entry process of the nasoenteric tube cannot be seen with the naked eye on the front. It can be observed through the ultrasound window. The entry process of the nasoenteric tube and the obstruction or kinking of the nasoenteric tube can be seen on the back, which provides an auxiliary basis for ultrasound observation.

[0020] 3. The resistance area is designed with a back opening, which allows for easy external manual pressure on the tip of the nasoenteric tube and effectively simulates resistance.

[0021] 4. The mold of this utility model can help learners experience the signs of ultrasound diagnosis of nasoenteric tube placement, nasoenteric tube position, and obstruction, enabling learners to master the signs of ultrasound and increasing their interest in learning. Attached Figure Description

[0022] The above is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, the following describes this utility model in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic diagram of the digestive tract simulator structure in one embodiment of the present invention;

[0024] Figure 2 This is a front view (perspective) of a mold for placing a nasoenteric tube under simulated real-time ultrasound guidance in one embodiment of this utility model.

[0025] Figure 3 This is a schematic diagram of the back structure of a mold for placing a nasoenteric tube under simulated real-time ultrasound guidance in one embodiment of this utility model.

[0026] In the picture:

[0027] 1-Digestive tract simulator; 11-Esophagus; 12-Stomach; 13-Duodenum; 14-Jejunum; 2-Acrylic glass; 21-Front side of acrylic glass; 22-Back side of acrylic glass; 3-Opening at the esophagus; 4-Opening at the antrum of the stomach; 5-Opening at the stomach; 6-Opening at the duodenum. Detailed Implementation

[0028] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0029] This embodiment provides a mold simulating real-time ultrasound-guided placement of a nasoenteric tube, in conjunction with... Figure 1 As shown, the digestive tract simulator 1 simulates the course and general outline of the esophagus 11, stomach 12, duodenum 13, and jejunum 14. It is designed with reference to actual human dimensions, approximately equivalent to those of a human body. The digestive tract simulator 1 is made of a flexible material that can transmit ultrasound, and is designed to be opaque on the front and transparent on the back. In this embodiment, silicone or plastic is preferred. Taking silicone as an example, the front layer is made of opaque silicone (such as the color of the intestines or other colors), and the back layer is made of transparent silicone. Both layers are designed according to the course of the digestive tract, and the two identical layers are stacked together. The sides and bottom edges are bonded together using physical or chemical methods, forming the esophagus 11, stomach 12, duodenum 13, and jejunum 14 internally. The digestive tract simulator 1 is placed vertically, and the stomach 12, duodenum 13, and jejunum 14 inside are filled with liquid, such as water or rice paste. The esophagus 11 is filled with air, thus forming the course and general outline of the digestive tract simulator 1.

[0030] Cooperate Figure 2 , 3 As shown, the mold also includes two layers of plexiglass 2 for fixing the digestive tract simulator 1. The digestive tract simulator 1 is fixed between the two layers of plexiglass 2. Preferably, the stomach body portion of the stomach 12 is attached to the two layers of plexiglass 2 to form the outline of the stomach 12, which can well simulate the folding of the nasoenteric tube inside the stomach 12. The esophagus 11, duodenum 13, and jejunum 14 can be located between the two layers of plexiglass 2, and conventional auxiliary fixation components can be selected for fixation according to the actual situation.

[0031] In the two layers of acrylic glass 2, the front acrylic glass 21 is opaque, while the back acrylic glass 22 is transparent. Combined with the opaque front and transparent back design of the digestive tract simulator 1, the entire mold achieves a configuration where the front is opaque and the back is transparent. The opaque front prevents the insertion of the nasoenteric tube from being observed with the naked eye; its position can only be determined by ultrasound observation of specific signs during placement. The transparent back allows for a clear view of the entire shape of the nasoenteric tube (its position within the gastrointestinal tract), enabling visual observation of its actual condition.

[0032] To simulate real-time ultrasound-guided placement of a nasoenteric tube, this embodiment sets up two key ultrasound observation points: the esophagus (to determine if the nasoenteric tube has entered the esophagus) and the gastric antrum (to determine the relative position of the nasoenteric tube and the gastric antrum through the "clouding sign"). Specifically, the front acrylic glass 21 has openings at the esophagus and the gastric antrum, respectively, serving as ultrasound windows. The opening 3 at the esophagus is located in the upper part of the esophagus and is rectangular, measuring 4*2cm; the opening 4 at the gastric antrum is rectangular, measuring 7*3cm. It should be noted that because air is mixed between the front acrylic glass 21 and the digestive tract simulator 1, ultrasound cannot directly penetrate it. By setting up openings, these openings can serve as ultrasound windows. Among them, the opening 3 at the esophagus is used for ultrasound observation of the air filling sign of the esophagus when the nasoenteric tube is placed; the opening 4 at the gastric antrum is used for ultrasound observation of the cloud sign at the tip of the nasoenteric tube (the size, direction, delay, etc. of the cloud sign). The cloud sign at the tip of the nasoenteric tube is observed through the gastric antrum, and the positional relationship between the tip of the nasoenteric tube and the gastric antrum is determined based on the depth of the nasoenteric tube placement and the direction and size of the cloud sign.

[0033] In addition, to simulate the situation where the tip of the nasoenteric tube is obstructed from advancing, multiple resistance points are provided at the stomach 12 and duodenum 13. The resistance points at the stomach 12 and duodenum 13 can be in the form of depressions on the inner walls of the stomach 12 and duodenum 13.

[0034] In order to better simulate the generated resistance, in conjunction with Figure 3 As shown, a stomach opening 5 and a duodenum opening 6 can be respectively provided on the plexiglass 22 on the back, corresponding to the positions of the stomach 12 and duodenum 13. Preferably, one stomach opening 5 is provided, located in the lower part of the stomach body of the stomach 12; preferably, three duodenum openings 6 are provided, located in the descending part of the duodenum, the horizontal part of the duodenum, and the ascending part of the duodenum, respectively. By providing these openings, and in conjunction with the transparent material on the back, the tip of the nasoenteric tube can be manually pressed externally, causing the nasoenteric tube to deviate from its normal course and become obstructed. This simulates the special symptoms of obstruction at different locations, preventing the nasoenteric tube from entering smoothly during placement.

[0035] In actual simulated teaching demonstrations, the mold is held vertically. After liquid is injected, the shapes of the stomach 12, duodenum 13, and jejunum 14 are inflated by the liquid, revealing the gastrointestinal outline. The esophagus 11 is not filled with liquid, only air. When the nasoenteric tube enters the esophagus, it can be observed through ultrasound at the opening 3 in the esophagus. Ultrasound signs of the nasoenteric tube entering the esophagus can be observed, such as esophageal inflation signs, esophageal movement related to nasoenteric tube inflation, or strong echo dynamic images. As the nasoenteric tube continues to enter, the clouding sign at the tip of the nasoenteric tube can be observed through the opening 4 in the gastric antrum, thus determining the relative position of the tip of the nasoenteric tube and the gastric antrum.

[0036] In practice, the learner operates the ultrasound instrument from the front, only able to observe through the opening. When abnormalities are observed, the learner can assist by checking the actual insertion of the nasoenteric tube from the back, such as whether it is obstructed or kinked. Additionally, a teacher at the back acts as an assistant, manipulating the nasoenteric tube and creating obstructions at different points, such as manually pressing the tip of the nasoenteric tube through the opening at the back, causing it to deviate from its normal course and become obstructed. The learner at the front is unaware of this obstruction but can judge whether it has occurred by observing the depth of the nasoenteric tube placement and the actual situation of the cloudiness at the tip of the nasoenteric tube during ultrasound observation (the difference between resistance and normal conditions). This judgment can then be verified based on the actual observations from the back.

[0037] This invention uses the aforementioned mold to represent the pathways of the esophagus, stomach, duodenum, and jejunum. It allows for ultrasound observation at key ultrasound-guided points and incorporates resistance elements, enabling the simulation of ultrasound findings under different conditions. This allows for the simulation of the entire process of ultrasound-guided placement of a nasoenteric tube, aiding in teaching and facilitating simulated teaching demonstrations. It helps learners grasp ultrasound findings and increases their interest in learning.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes or alterations made by those skilled in the art using the above-disclosed technical content shall fall within the protection scope of the present utility model.

Claims

1. A mold for simulating real-time ultrasound-guided placement of a nasoenteric tube, characterized in that, Includes digestive tract simulators simulating the esophagus, stomach, duodenum, and jejunum; The digestive tract simulator is made of a flexible material that can transmit ultrasound, with an opaque front and a transparent back; and the esophagus inside the digestive tract simulator is used to fill air, while the rest of the body is used to fill liquid. The digestive tract simulator is fixed between two layers of plexiglass, with the front layer being opaque and the back layer being transparent. The front plexiglass has openings at the esophagus and the gastric antrum, respectively, serving as ultrasound windows for ultrasound observation of the air in the esophagus and the clouding at the tip of the nasoenteric tube in the gastric antrum during placement of the nasoenteric tube. Multiple resistance points are provided in the stomach and duodenum to obstruct the forward entry of the nasoenteric tube tip.

2. The mold for placing a nasoenteric tube under simulated real-time ultrasound guidance according to claim 1, characterized in that, The points of resistance in the stomach and duodenum are: An opening is provided on the back of the plexiglass corresponding to the location of the stomach and duodenum. The opening provides a channel for the nasoenteric tube to enter by external manual pressing of the tip of the nasoenteric tube, which would cause the nasoenteric tube to be blocked. Alternatively, a recess may be provided on the inner wall of the stomach and duodenum.

3. The mold for placing a nasoenteric tube under simulated real-time ultrasound guidance according to claim 2, characterized in that, An opening is provided in the lower part of the stomach body, the descending part of the duodenum, the horizontal part of the duodenum, and the ascending part of the duodenum; Alternatively, a depression may be provided on the inner wall of the lower part of the stomach body, the descending part of the duodenum, the horizontal part of the duodenum, and the ascending part of the duodenum.

4. The mold for placing a nasoenteric tube under simulated real-time ultrasound guidance according to claim 1, characterized in that, The digestive tract simulator is made of silicone or plastic.

5. The mold for placing a nasoenteric tube under simulated real-time ultrasound guidance according to claim 4, characterized in that, The digestive tract simulator is made of two layers of material with the same shape stacked together, with the sides and bottom edges glued together.

6. The mold for placing a nasoenteric tube under simulated real-time ultrasound guidance according to claim 1, characterized in that, In the digestive tract simulator, the stomach body is attached to two layers of plexiglass, and the esophagus, duodenum, and jejunum are fixed between the two layers of plexiglass by auxiliary fasteners.

7. The mold for placing a nasoenteric tube under simulated real-time ultrasound guidance according to claim 1, characterized in that, The esophagus is filled with air, and the liquid in the part other than the esophagus is water or rice paste.

8. The mold for placing a nasoenteric tube under simulated real-time ultrasound guidance according to claim 1, characterized in that, The digestive tract simulator is designed with reference to the actual size of the human body.

9. The mold for placing a nasoenteric tube under simulated real-time ultrasound guidance according to claim 8, characterized in that, The opening at the esophagus is rectangular, measuring 4*2cm; the opening at the gastric antrum is rectangular, measuring 7*3cm.

10. The mold for placing a nasoenteric tube under simulated real-time ultrasound guidance according to claim 1, characterized in that, The opening in the esophagus is located in the upper part of the esophagus.

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