Pleura cavity pressure measurement simulation device

Abstract

The utility model provides a pleural cavity pressure measurement simulation device. The pleural cavity pressure measurement simulation device comprises a carrier plate, a simulation head part, a simulation chest part and a simulation stomach part, an oral cavity channel and a nasal cavity channel are arranged in the simulated head; the simulated chest comprises a simulated esophagus, a simulated lung, a simulated trachea and a bronchus, the simulated chest is sealed by adopting a simulated chest cavity, a pressure sensor is arranged at a position corresponding to a pleural cavity, and a trachea cannula connecting port is arranged on the simulated trachea; the simulated esophagus is communicated with the oral cavity channel, the nasal cavity channel and the simulated stomach, and a prompt sensor is arranged at the position of two thirds of the middle lower portion of the simulated esophagus. The device can display the pressure condition in the thoracic cavity in real time, the simulated tracheal bronchus is connected with the simulated lung and can be connected with a breathing machine to simulate autonomous respiration and positive pressure ventilation conditions, and meanwhile, an esophageal pressure catheter can be placed through the nasal cavity to simulate how to determine the position of the esophageal pressure catheter. Meanwhile, the difference between the pressure measured by the esophageal catheter and the directly measured pressure is determined.

Description

Technical Field

[0001] This utility model belongs to the field of medical simulation device technology, specifically relating to a pleural cavity pressure measurement simulation device. Background Technology

[0002] Pleural pressure measurement is an important method for assessing respiratory mechanics, especially in mechanically ventilated patients, as it can be used to calculate transpulmonary pressure, the difference between alveolar pressure and pleural pressure. There are two methods for measuring pleural pressure: direct and indirect. The direct method involves inserting a needle connected to a manometer obliquely into the pleural cavity, and the pressure is directly indicated by the fluid level in the manometer. However, this method carries the risk of puncturing the visceral pleura and lung. The indirect method involves having the subject swallow a catheter with a thin-walled cuff to the lower two-thirds of the esophagus, and measuring changes in esophageal pressure during respiration to indirectly indicate changes in pleural pressure. This method is based on the fact that the esophagus is located between the lungs and the chest wall, and changes in esophageal pressure during respiration can reflect changes in pleural pressure.

[0003] Currently, indirect measurement is generally used, but it is affected by multiple factors such as patient position, catheter location, and balloon size, leading to many errors in clinical use and discrepancies with actual values. Standardized training and correction are necessary. However, a suitable model is currently lacking, and the procedure can only be performed on animals or patients. Summary of the Invention

[0004] This invention addresses the aforementioned problems by providing a pleural cavity pressure measurement simulation device. As a biomimetic model for direct and indirect measurement of intrathoracic pressure, it can reflect changes in intrathoracic pressure under spontaneous breathing and mechanical ventilation, and simulate changes in esophageal pressure under different respiratory support conditions.

[0005] To achieve the above objectives, the specific technical solution adopted by this utility model is as follows:

[0006] The pleural cavity pressure measurement simulation device provided by this utility model includes a carrier plate and a simulated head, simulated chest and simulated stomach mounted on the carrier plate.

[0007] The simulated head is equipped with oral and nasal passages; the simulated chest includes a simulated esophagus, simulated lungs, simulated trachea and bronchi. The simulated chest is sealed with a simulated pleural cavity and pressure sensors are installed at corresponding positions in the pleural cavity. The simulated trachea is equipped with an endotracheal tube connection port; the simulated esophagus is connected to the oral and nasal passages and the simulated stomach, and a prompting sensor is installed in the lower two-thirds of the simulated esophagus.

[0008] This utility model can display the intrathoracic pressure in real time, simulate the trachea and bronchi to simulate the lungs, and can be connected to a ventilator to simulate spontaneous breathing and positive pressure ventilation. At the same time, an esophageal pressure catheter can be placed through the nasal cavity, simulating how to determine the location of the esophageal pressure catheter and the difference between the pressure measured by the esophageal pressure catheter and the pressure measured directly.

[0009] Preferably, in the pleural cavity pressure measurement simulation device provided by this utility model, the simulated head, simulated chest and simulated stomach are 3D printed based on the actual organ shapes, which can more accurately simulate the shape and proportion of human organs.

[0010] Preferably, in the pleural cavity pressure measurement simulation device provided by this utility model, the simulated chest and simulated stomach are made of elastic materials to enable pressure detection.

[0011] Preferably, in the pleural cavity pressure measurement simulation device provided by this utility model, the carrier plate is provided with groove contours simulating the head, chest, and stomach, which facilitates the installation of the simulated organs.

[0012] Preferably, in the pleural cavity pressure measurement simulation device provided by this utility model, the bottom of the simulated head, simulated chest and simulated stomach are fixedly mounted on the carrier plate by means of adhesive or screw fastening to achieve fixation.

[0013] Preferably, in the pleural cavity pressure measurement simulation device provided by this utility model, the simulated pleural cavity is an arc-shaped plate that seals the entire simulated pleural cavity from the neck of the simulated head; at the same time, a soft silicone pad is provided inside the simulated pleural cavity to give the simulated pleural cavity a certain degree of softness.

[0014] Preferably, in the pleural cavity pressure measurement simulation device provided by this utility model, the simulated pleural cavity is provided with an endotracheal tube perforation, a pressure sensor lead wire perforation, and a vacuum pump connector. A ventilator can be connected via the endotracheal tube to simulate changes in esophageal pressure under spontaneous breathing and mechanical ventilation conditions; the pressure sensor lead wire is connected to an external monitor to display real-time changes in intrapleural cavity pressure; the vacuum pump connector is connected to a vacuum pump to maintain negative pressure within the pleural cavity.

[0015] Preferably, in the pleural cavity pressure measurement simulation device provided by this utility model, a sealing ring is provided in the endotracheal tube perforation and the wire perforation of the pressure sensor, and a sealing cap is provided at the upper end; a sealing cap is also provided on the vacuum pump connector to ensure the sealing of the simulated pleural cavity.

[0016] Preferably, in the pleural cavity pressure measurement simulation device provided by this utility model, the prompting sensor is a voice or color sensor, which prompts that the position is correct when the catheter with the thin-walled airbag is moved to the position.

[0017] The technical effects of this utility model are as follows:

[0018] First, the pleural cavity pressure measurement simulation device provided by this utility model is made of biomimetic materials to simulate the head, chest and stomach cavity, covering the basic pleural cavity structure such as the upper respiratory tract, esophagus, lungs, trachea and bronchi. The pleural cavity is sealed, and a pressure sensor is installed inside the pleural cavity. The wires are connected to an external monitor, which can display the changes in pressure inside the pleural cavity in real time.

[0019] Secondly, the simulation device of this invention can repeatedly place and determine the position of the esophageal pressure monitoring catheter, and combine it with endotracheal intubation and ventilator connection to simulate changes in esophageal pressure under spontaneous breathing and mechanical ventilation conditions; at the same time, it can simulate changes in esophageal pressure under different clinical scenarios; and compare the intrapleural pressure measured by esophageal pressure with that of intrapleural pressure sensors to reflect the limitations of intraesophageal pressure monitoring.

[0020] Third, the simulation device of this utility model is the first biomimetic model for direct and indirect measurement of intrathoracic pressure. It can reflect changes in intrathoracic pressure under spontaneous breathing and mechanical ventilation conditions. It has high repeatability and can be used for teaching and training. It is suitable for operation demonstrations, teaching and training and conference presentations. Attached Figure Description

[0021] Figure 1 This invention presents a schematic diagram of the external structure of the pleural cavity pressure measurement simulation device.

[0022] Figure 2 A schematic diagram of the internal structure of the pleural cavity pressure measurement simulation device of this invention is shown. Detailed Implementation

[0023] The following embodiments and experimental examples further illustrate the present invention and should not be construed as limiting the present invention.

[0024] The pleural cavity pressure measurement simulation device 100 provided in this embodiment includes a carrier plate 1 and a simulated head 2, a simulated chest 3, a simulated stomach 4 and a simulated pleural cavity 5 mounted on the carrier plate.

[0025] The carrier plate 1 is a rigid square plate with grooves shaped like a simulated head 2, simulated chest 3, and simulated stomach 4 to facilitate the installation of each simulated organ. During installation, the bottoms of the simulated head 2, simulated chest 3, and simulated stomach 4 are fixed to the carrier plate by adhesive or screws to achieve fixation.

[0026] The simulated head 2 mimics the shape of a head in a lateral position and includes an oral cavity passage 21 and a nasal cavity passage 22. The simulated chest 3 includes a simulated esophagus 31, simulated lungs 32, and simulated trachea and bronchi 33; the simulated stomach 4 communicates with the simulated esophagus 31 and is sealed at its bottom. The simulated chest 3 is sealed using a simulated thoracic cavity 5, and a pressure sensor 6 is installed at a corresponding position in the pleural cavity. A prompting sensor 7 is located in the lower two-thirds of the simulated esophagus 31. This prompting sensor is a voice or color sensor; it indicates correct positioning when a catheter with a thin-walled airbag is moved to this position.

[0027] During the fabrication of the simulated organs, the simulated head 2, simulated chest 3, and simulated stomach 4 were 3D printed based on the shapes of actual organs, allowing for a more precise simulation of the shape and proportions of human organs. In terms of material selection, the simulated head 2 was made of rigid plastic, while the simulated chest 3 and simulated stomach 4 were made of elastic materials to facilitate pressure detection.

[0028] The simulated thoracic cavity 5 is used to simulate the closed environment inside the thoracic cavity. It is an arc-shaped plate that seals the entire simulated thoracic cavity from the neck of the simulated head. At the same time, a soft silicone pad is placed inside the simulated thoracic cavity to give it a certain degree of softness.

[0029] In this embodiment, in order to achieve simulated spontaneous breathing, an endotracheal tube connection port 331 is provided on the simulated trachea and bronchus 33, and an endotracheal tube perforation 51 is provided on the simulated thoracic cavity 5; in order to achieve real-time monitoring of intrathoracic pressure, a pressure sensor 6 is connected to an external monitor via a wire, and a wire perforation 52 for the pressure sensor is provided on the simulated thoracic cavity 5; in order to achieve negative pressure in the thoracic cavity, a vacuum pump connector 53 is provided on the simulated thoracic cavity 5.

[0030] The endotracheal tube can be connected to a ventilator to simulate changes in esophageal pressure during spontaneous breathing and mechanical ventilation; the pressure sensor wires can be connected to an external monitor to display changes in intrathoracic pressure in real time; the vacuum pump connector can be connected to a vacuum pump to maintain negative pressure in the thoracic cavity.

[0031] In addition, sealing rings are installed inside the endotracheal tube perforation and the wire perforation of the pressure sensor, and sealing caps are installed at the top; sealing caps are also installed on the vacuum pump connector to ensure the seal within the simulated thoracic cavity.

[0032] This invention features a structure that can display intrathoracic pressure in real time, simulates the connection between the trachea and bronchi to simulate the lungs, and can be connected to a ventilator to simulate spontaneous breathing and positive pressure ventilation. It can also place an esophageal pressure catheter through the nasal cavity, simulating how to determine the location of the esophageal pressure catheter and the difference between the pressure measured by the esophageal pressure catheter and the pressure measured directly. It is the first biomimetic model for direct and indirect measurement of intrathoracic pressure, capable of reflecting changes in intrathoracic pressure under spontaneous breathing and mechanical ventilation conditions. It is highly repeatable and suitable for teaching, training, and conference presentations.

[0033] The undescribed parts of this utility model are the same as or implemented using existing technology. The applicant declares that this utility model is illustrated through the above embodiments, but it is not limited to the above detailed methods, meaning that this utility model does not necessarily rely on the above detailed methods for implementation. Those skilled in the art should understand that any improvements to this utility model, equivalent substitutions of raw materials, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection and disclosure scope of this utility model.

Claims

1. A pleural cavity pressure measurement simulation device, characterized in that, This includes a carrier plate and a simulated head, simulated chest, and simulated stomach mounted on the carrier plate. The simulated head is provided with an oral cavity and a nasal cavity; the simulated chest includes a simulated esophagus, simulated lungs, simulated trachea and bronchi, the simulated chest is sealed with a simulated pleural cavity and a pressure sensor is provided at the corresponding position of the pleural cavity, and the simulated trachea is provided with an endotracheal tube connection port. The simulated esophagus is connected to the oral cavity, nasal cavity, and simulated stomach. A prompting sensor is installed in the lower two-thirds of the simulated esophagus.

2. The pleural cavity pressure measurement simulation device according to claim 1, characterized in that, The simulated head, chest, and stomach were 3D printed based on the shapes of the actual organs.

3. The pleural cavity pressure measurement simulation device according to claim 1, characterized in that, The simulated chest and stomach are made of elastic material.

4. The pleural cavity pressure measurement simulation device according to claim 2, characterized in that, The carrier plate is provided with grooves that simulate a head, chest, and stomach.

5. The pleural cavity pressure measurement simulation device according to claim 1, characterized in that, The bottoms of the simulated head, simulated chest, and simulated stomach are fixedly mounted on the carrier plate by means of adhesive or screws.

6. The pleural cavity pressure measurement simulation device according to claim 1, characterized in that, The simulated thoracic cavity is an arc-shaped plate that seals the entire simulated thoracic cavity from the neck of the simulated head; the interior of the simulated thoracic cavity is lined with soft silicone pads.

7. The pleural cavity pressure measurement simulation device according to claim 6, characterized in that, The simulated chest cavity is equipped with a tracheal tube perforation, a pressure sensor wire perforation, and a vacuum pump connector.

8. The pleural cavity pressure measurement simulation device according to claim 7, characterized in that, The endotracheal tube perforation and the pressure sensor wire perforation are equipped with sealing rings, and the upper end is equipped with a sealing cap; the vacuum pump connector is also equipped with a sealing cap.

9. The pleural cavity pressure measurement simulation device according to claim 1, characterized in that, The prompt sensor is a voice or color sensor.

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