Multi-balloon autonomous positioning assisted pressing system and method for enteroscopy

Abstract

The application provides a multi-air-bag autonomous positioning auxiliary pressing system and method for enteroscopy, which comprises an arch-shaped frame for providing support, an air-bag pressing mechanism, a magnetic ring positioning mechanism and a control mechanism. The air-bag pressing mechanism comprises a matrix air bag and a fixed air bag. The matrix air bag is arranged on one side of the arch-shaped frame and comprises a plurality of first air bags arranged in sequence. The first air bag at a specified position is inflated to press the abdomen of a patient. The fixed air bag is arranged on the other side of the arch-shaped frame and is used for providing a reverse thrust for the patient. The magnetic ring positioning mechanism is used for acquiring position information of an enteroscope in a human body and position information of each first air bag relative to the enteroscope. The control mechanism is used for determining the first air bag corresponding to the position to be pressed and controlling the corresponding first air bag to perform a pressing operation. The application can improve the intelligent degree of enteroscopy and has the advantages of rapid positioning of pressing points and high efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a multi-balloon autonomous positioning auxiliary pressing system and method for enteroscopy. BACKGROUND

[0002] Enteroscopy is a diagnostic method used by doctors to examine internal lesions of the large intestine and colon. A long and flexible enteroscope is inserted into the intestinal tract through the anus and finally reaches the cecum. However, in clinical practice, it is often difficult to insert the endoscope due to factors such as postoperative adhesion and intestinal distortion. Currently, in addition to changing body position, pressing the abdomen (commonly known as pressing the endoscope) is an important auxiliary means for enteroscopy, which can effectively prevent the intestinal tube from being tangled during insertion of the endoscope, making the insertion more smooth, thereby reducing the patient's pain. When pressing the abdomen, the operator needs to infer the position of the endoscope in real time through the information obtained from the display to determine whether the pressing is effective and adjust the pressing method in time, which is highly dependent on experience and touch. Because of the long training time and high cost, and the need for 2-3 medical staff to complete the enteroscopy, the additional labor cost is increased. Artificially pressing the abdomen requires constant adjustment, which increases the time of enteroscopy and affects the efficiency of diagnosis and treatment.

[0003] After searching, it is found that:

[0004] A Chinese utility model patent with the publication number CN216257025U discloses an auxiliary enteroscopy pressing fixing belt, which has a ring-shaped belt body. The middle part of the belt body has a plurality of inflatable air bags corresponding to the abdominal position of the human body. The bottom of the inflatable air bag is connected to an external inflation valve through a gas pipe. The inflation valve is used to control the inflation and deflation of the inflatable air bag. The patient wears the fixing belt, and the doctor only needs to adjust the inflatable air bag to press the patient's belly through the controller to assist in colonoscopy. However, this patent still has the following problems: it does not have the ability to automatically locate and find the pressing point, and still needs to be manually operated by the doctor. Although it reduces the physical exertion of the doctor, it still highly depends on the personal experience of the doctor, causing long training time, high cost, and low efficiency. SUMMARY

[0005] In view of the defects in the prior art, the purpose of the present application is to provide a multi-balloon autonomous positioning auxiliary pressing system and method for enteroscopy.

[0006] According to one aspect of the present application, a multi-balloon autonomous positioning auxiliary pressing system for enteroscopy is provided, which comprises:

[0007] An arch-shaped frame for providing support;

[0008] The airbag pressing mechanism comprises a matrix airbag and a fixed airbag, the matrix airbag is arranged on one side of the arch-shaped frame, and comprises a plurality of first airbags arranged in sequence, and the first airbag at a specified position is inflated and expanded to press the abdomen of a patient; the fixed airbag is arranged on the other side of the arch-shaped frame, and is used for providing a reverse thrust force for the patient.

[0009] The magnetic ring positioning mechanism is used for acquiring position information of the enteroscope tube in the human body and position information of each first airbag relative to the enteroscope tube.

[0010] The control mechanism determines the first airbag corresponding to the position to be pressed according to the position information of the enteroscope tube in the human body and the position information of each first airbag relative to the enteroscope tube, and controls the first airbag to perform the pressing operation.

[0011] Further, the matrix airbag comprises a plurality of first airbags, and the first airbags are arranged in a matrix, and each first airbag is controlled by an independent electromagnetic air valve.

[0012] Further, the first airbag is in a capsule type.

[0013] Further, the control mechanism comprises:

[0014] The first air pump is connected with the electromagnetic air valve and supplies air to each first airbag;

[0015] The second air pump is used for supplying air to the fixed airbag.

[0016] Further, the magnetic ring positioning mechanism comprises:

[0017] The first magnetic ring module is located inside the enteroscope tube and is used for acquiring position information of the enteroscope tube in the human body;

[0018] The second magnetic ring module is arranged at four corners of the matrix airbag and is used for acquiring position information of each first airbag relative to the enteroscope tube;

[0019] The receiver is connected with the first magnetic ring module, the second magnetic ring module and the control mechanism respectively, and is used for sending the position information of the enteroscope tube in the human body and the position information of each first airbag relative to the enteroscope tube to the control mechanism.

[0020] Further, the control mechanism comprises:

[0021] The processor determines the 3D shape of the enteroscope tube in the human body according to the position information of the enteroscope tube in the human body, so as to determine the position to be pressed by the enteroscope tube, and determines the first airbag closest to the position to be pressed according to the position information of each first airbag relative to the enteroscope tube.

[0022] The controller controls the first air bag closest to the position requiring pressing to inflate.

[0023] Further, the controller controls the first air bag at the designated position to inflate by controlling the corresponding electromagnetic air valve, and controls the pressing force of the first air bag by controlling the power of the first air pump to control the air pressure intensity.

[0024] Further, the processor is further configured to observe the position change of the enteroscope tube in the human body in real time, and thus adaptively adjust the first air bag requiring inflation and the power of the first air pump, and perform combined pressing of multiple first air bags.

[0025] Further, the fixed air bag is a single air bag.

[0026] According to another aspect of the present application, a multi-air bag autonomous positioning auxiliary pressing method for enteroscopy is provided, which is implemented by using the multi-air bag autonomous positioning auxiliary pressing system for enteroscopy.

[0027] The patient lies inside the arch-shaped frame, the matrix air bag is placed on the abdomen of the patient and adheres to the abdomen, and the fixed air bag adheres to the waist;

[0028] The position information of the enteroscope tube in the human body and the position information of each first air bag relative to the enteroscope tube are obtained by the magnetic ring positioning mechanism.

[0029] According to the position information of the enteroscope tube in the human body and the position information of each first air bag relative to the enteroscope tube, the first air bag corresponding to the position requiring pressing is determined.

[0030] The corresponding first air bag in the matrix air bag is controlled to perform pressing operation, and the fixed air bag is opened to assist pressing.

[0031] Compared with the prior art, the present application has at least one of the following beneficial effects:

[0032] The multi-air bag autonomous positioning auxiliary pressing system and method for enteroscopy provided by the present application determine the pressing position of the enteroscope by the magnetic ring positioning mechanism, control the first air bag at the designated position to inflate and press the abdomen by the control mechanism, and provide the patient with a reverse thrust by the fixed air bag, so as to achieve the purpose of automatically pressing the abdomen and assisting in entering the enteroscope. The present application can improve the intelligent degree of enteroscopy, has the advantages of fast positioning of pressing points and high pressing efficiency, and the pressing force is stepless and adjustable, the patient has good tolerance, and the labor cost of enteroscopy can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0033] Other features, objects, and advantages of the application will become more apparent from the following detailed description when read in conjunction with the accompanying drawings:

[0034] Fig. 1 A schematic diagram of a multi-balloon autonomous positioning and assisted pressing system according to an embodiment of the application;

[0035] Fig. 2 A schematic diagram of a balloon pressing mechanism according to an embodiment of the application;

[0036] Fig. 3 A schematic diagram of a multi-balloon autonomous positioning and assisted pressing system according to an embodiment of the application.

[0037] In the figure: 1 - an arch-shaped frame, 2 - a balloon pressing mechanism, 21 - a matrix balloon, 211 - a first balloon, 212 - a first air pump, 213 - an electromagnetic valve, 22 - a fixed balloon, 3 - a magnetic ring positioning mechanism, 31 - a first magnetic ring module, 32 - a second magnetic ring module, 33 - a receiver, 4 - a control mechanism, 41 - a processor, 42 - a controller, 43 - a display and control terminal, 5 - a colonoscope tube, and a indicates inflation of the balloon. DETAILED DESCRIPTION

[0038] The application will be described in greater detail with reference to specific embodiments. The following embodiments are presented by way of example only and are not intended to limit the present application in any way. It should be noted that for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application. These all fall within the scope of the present application.

[0039] Reference Figs. 1-3 A schematic diagram of a multi-balloon autonomous positioning and assisted pressing system for colonoscopy according to an embodiment of the application is provided, which includes an arch-shaped frame 1, a balloon pressing mechanism 2, a magnetic ring positioning mechanism 3, and a control mechanism 4, wherein: the arch-shaped frame 1 is used to provide support; the balloon pressing mechanism 2 includes a matrix balloon 21 and a fixed balloon 22, the matrix balloon 21 is arranged on one side of the arch-shaped frame 1 and includes a plurality of first balloons 211 arranged in sequence, a specified first balloon 211 is inflated and expanded, as shown by a in the figure, to press the abdomen of a patient; the fixed balloon 22 is arranged on the other side of the arch-shaped frame 1 and is used to provide a reverse pushing force for the patient; the magnetic ring positioning mechanism 3 is used to obtain position information of the colonoscope tube 5 in the human body and position information of each first balloon 211 relative to the colonoscope tube 5; the control mechanism 4 determines the first balloon 211 corresponding to the position to be pressed according to the position information of the colonoscope tube 5 in the human body and the position information of each first balloon 211 relative to the colonoscope tube 5, and controls the corresponding first balloon 211 to perform pressing work. Fig. 2 ​

[0040] The multi-air bag autonomous positioning auxiliary pressing system in the embodiment of the application determines the pressing position of the enteroscope through the magnetic ring positioning mechanism 3, controls the first air bag 211 at the specified position to inflate and press the abdomen through the control mechanism 4, and uses the fixed air bag 22 to provide a reverse thrust for the patient, so as to achieve the purpose of automatically pressing the abdomen and assisting in the insertion of the enteroscope, can improve the intelligent degree of the enteroscope examination, and has the advantages of rapid positioning of the pressing point and high pressing efficiency.

[0041] In some embodiments, the matrix air bag 21 includes a plurality of first air bags 211, the diameter of the first air bag 211 is 50 mm, the air bag spacing is 5 mm, the matrix air bag 21 is formed by arranging 4*5 small air bags to form a matrix, and the area of the matrix air bag 21 can cover the position range of most patients who need to press the abdomen. The plurality of first air bags 211 are arranged to form a matrix, for example, the matrix air bag 21 is composed of 4*5 first air bags 211, and each first air bag 211 is controlled by an independent electromagnetic air valve 213. The first air bag 211 is in the form of a capsule, which can ensure the pressing force while reducing the discomfort of the patient. The inflation of the first air bag 211 at the specified position of the matrix air bag 21 can achieve the effect of pressing the patient's abdomen, thereby achieving the effect of assisting in the insertion of the enteroscope. Of course, these are only some choices of embodiments, and the specific parameters can be determined according to the needs in actual use.

[0042] In some embodiments, the fixed air bag 22 is a single larger air bag, the diameter of the fixed air bag 22 is 30 cm, the unpressurized height is 3 cm, and the inflated and pressurized height can reach 6 cm, which can adapt to the stress condition of the back of most patients. Of course, these are only some choices of embodiments, and the specific parameters can be determined according to the needs in actual use.

[0043] In some embodiments, a first air pump 212 and a second air pump are further included, the first air pump 212 is connected with the electromagnetic air valve 213 and supplies air to each first air bag 211 respectively, and the second air pump is used to supply air to the fixed air bag 22. The second air pump is connected with the corresponding electromagnetic air valve, that is, the first air bag 211 and the fixed air bag 22 are controlled by the electromagnetic air valve.

[0044] When the electromagnetic valve 213 is opened, the corresponding first airbag 211 is inflated and expands outward, thus pressing on the patient's abdomen. The higher the air pressure, the greater the pressure. By controlling the electromagnetic valve 213, different first airbags 211 can be inflated, allowing pressure to be applied to different positions on the patient's abdomen. Because patients undergoing colonoscopy generally lie on their side, the matrix airbag 21 and the fixed airbag 22 are installed on both sides within the arch-shaped frame 1, providing sufficient support when the first airbag 211 is compressed. When the first airbag 211 in the matrix airbag 21 presses on the patient's abdomen, the patient's body will involuntarily be pushed away. Therefore, the fixed airbag 22 needs to provide a reverse pushing force to push the patient towards the matrix airbag 21, thereby achieving a better compression effect.

[0045] In some embodiments, the magnetic ring positioning mechanism 3 includes a first magnetic ring module 31, a second magnetic ring module 32, and a receiver 33, wherein: the first magnetic ring module 31 is located inside the colonoscope tube 5 and is used to acquire the position information of the colonoscope tube 5 in the human body; the second magnetic ring module 32 is located at the four corners of the matrix airbags 21 and is used to acquire the position information of each first airbag 211 relative to the colonoscope tube 5; the receiver 33 is connected to the first magnetic ring module 31, the second magnetic ring module 32, and the control mechanism 4 respectively, and is used to send the position information of the colonoscope tube 5 in the human body and the position information of each first airbag 211 relative to the colonoscope tube 5 to the control mechanism 4.

[0046] Specifically, the first magnetic ring module 31 uses a magnetic ring coil, and the second magnetic ring module 32 also uses a magnetic ring coil. The magnetic ring coils are installed inside the colonoscope tube 5 and are evenly distributed with a certain gap. The magnetic ring coils generate a pulsed low-intensity magnetic field. After the receiver 33 receives the electromagnetic waves emitted by the magnetic field, it calculates the precise position of each magnetic ring coil. After obtaining the position data of each magnetic ring coil in the second magnetic ring module 32, the control mechanism 4 can determine the 3D shape of the colonoscope tube 5 inside the human body, thereby determining the position where the colonoscope tube 5 needs to be pressed. At the same time, the position information of the four magnetic ring coils distributed in the matrix airbag compression system is also calculated by the receiver 33, obtaining the position information of each first airbag 211 relative to the colonoscope tube 5. Then, the control mechanism 4 can determine the first airbag 211 closest to the position that needs to be pressed.

[0047] In some embodiments, the control mechanism 4 is an embedded control system, including a processor 41 and a controller 42, wherein: the processor 41 determines the 3D shape of the colonoscope tube 5 inside the human body based on the position information of the colonoscope tube 5 inside the human body, thereby determining the position where the colonoscope tube 5 needs to be pressed; and determines the first balloon 211 closest to the position to be pressed based on the position information of each first balloon 211 relative to the colonoscope tube 5; the controller 42 controls the first balloon 211 closest to the position to be pressed to inflate. The control mechanism 4 also includes a display and control terminal 43 to facilitate the user to control the colonoscopy operation and read the results.

[0048] In this embodiment, the controller 42 is responsible for controlling the electromagnetic valve 213 and the first air pump 212 of the airbag compression mechanism 2. It controls the opening and closing of the corresponding electromagnetic valve 213 to inflate and deflate the first airbag 211 at a designated position. The power of the first air pump 212 controls the air pressure intensity, thereby controlling the compression force of the first airbag 211. The compression force is automatically adjusted based on the position information of the magnetic ring coil on the endoscope tube 5. When the 3D shape of the loop position of the endoscope tube 5 is in the same plane, it indicates that the abdominal compression is in place. The compression force is infinitely adjustable by adjusting the air pump pressure. The processor 41 mainly performs logic and algorithm processing. Using the positioning information obtained from the magnetic ring positioning mechanism 3, it calculates the 3D shape of the endoscope tube 5 inside the body, thereby calculating the position where the endoscope tube 5 needs to be compressed (i.e., the node position where the endoscope tube 5 generates closed-loop movement). The position of each first airbag 211 relative to the endoscope tube 5 is calculated using the positioning data of the four magnetic ring coils of the airbag compression mechanism 2, thereby determining the first airbag 211 closest to the compression position. The controller 42 controls the first airbag 211 to perform the compression operation. The processor 41 can also observe the positional changes of the endoscope tube 5 in real time, thereby adaptively adjusting the airbags to be inflated and the compression force. Multiple first airbags 211 can be combined for compression. When the center point of all first airbags 211 cannot be aligned with the compression position, compression is performed by combining the compressions. By controlling the opening and closing of multiple electromagnetic valves 213, multiple adjacent first airbags 211 are inflated to achieve compression of the target position, thereby achieving a better compression effect.

[0049] In the above embodiments, a balloon-assisted compression system based on magnetic positioning technology is used. Magnetic ring positioning technology allows for convenient and rapid location of the compression point for the colonoscope. The control mechanism 4 controls the inflation of the first balloon 211 at the designated location to compress the abdomen, while the fixed balloon 22 provides a counter-force to the patient, thus achieving automatic abdominal compression and assisting in the insertion of the endoscope. The system in the above embodiments can quickly locate and perform compression operations without manual assistance, experience, or feel, improving the intelligence of colonoscopy. It has the advantages of rapid compression point location, high compression efficiency, and stepless adjustment of compression pressure, resulting in good patient tolerance. Simultaneously, it can significantly reduce labor costs, save colonoscopy time, and improve diagnostic and treatment efficiency.

[0050] Another embodiment of the present invention provides a multi-balloon autonomous positioning and assisted compression method for colonoscopy, which is implemented using the above-described multi-balloon autonomous positioning and assisted compression system for colonoscopy. (Continuing with the previous section...) Figs. 1-3 The method includes:

[0051] S1, the patient lies on their side inside the arch frame 1, the matrix airbag 21 is placed on the patient's abdomen and fits against the abdomen, and the airbag 22 is fixed to fit against the waist.

[0052] S2, the position information of the colonoscope tube 5 in the human body and the position information of each first balloon 211 relative to the colonoscope tube 5 are obtained through the magnetic ring positioning mechanism 3;

[0053] S3, based on the position information of the colonoscope tube 5 in the human body and the position information of each first balloon 211 relative to the colonoscope tube 5, determine the first balloon 211 corresponding to the position that needs to be pressed;

[0054] S4, control the first airbag 211 in the matrix airbag 21 to perform the pressing operation, and at the same time open the fixed airbag 22 to provide pressing assistance.

[0055] Specifically, before the colonoscopy, the patient lies on their side on the bed, and the balloon compression mechanism 2 is placed on the patient's abdomen. The matrix balloon 21 is in contact with the abdomen, and the fixing balloon 22 is in contact with the waist. All air pumps are in standby mode, and all electromagnetic valves are closed by default. The receiver 33 of the magnetic ring positioning mechanism 3 is placed on one side of the patient's back, and the magnetic ring coils of the second magnetic ring module 32 are evenly spaced inside the colonoscope tube 5. The control mechanism 4 (embedded control system) is connected to the balloon compression mechanism 2 and the magnetic ring positioning mechanism 3 respectively, and is in standby mode.

[0056] The doctor begins the colonoscopy procedure. When it is found that the colonoscope cannot be effectively advanced (the colonoscope tube 5 continues to enter, but the head of the colonoscope does not move significantly), it indicates that the colonoscope tube 5 has formed a closed-loop movement. At this time, it is necessary to press on the abdomen to provide support for the colonoscope tube 5 to ensure effective advancement. The doctor then activates the start button of the embedded control system, and the system begins to operate. Magnetic ring coils distributed inside the colonoscope tube 5 and the balloon compression mechanism 2 emit pulsed low-intensity magnetic fields. The receiver 33 captures the pulses and calculates the position information of each magnetic ring, sending this information to the embedded control system. The embedded control system calculates the 3D shape of the colonoscope tube 5 and displays it on the screen. It calculates the node position where the colonoscope tube 5 forms a closed-loop movement and determines the number of the nearest first balloon (the system will determine whether multiple first balloons 211 are needed for auxiliary compression based on the actual situation). The processor 41 sends a control signal to the controller 42, which then controls the air pump to pressurize and opens the solenoid valve of the corresponding first balloon 211. Simultaneously, the fixed air bladder 22 on the patient's back is deployed for compression assistance. The compression force is controlled by adjusting the pressure of the air pump, and the position and force can be adjusted in real time based on the 3D data from the colonoscope tube 5. When the doctor completes the colonoscopy, the embedded control system is stopped by pressing a button. The system then controls the air pump to depressurize, and the first air bladder 211 and the fixed air bladder 22 deflate, ending the compression operation.

[0057] It should be noted that the specific implementation of each step in the above-mentioned multi-airbag autonomous positioning assisted pressing method of the present invention can adopt the technical features corresponding to each module in the embodiment of the multi-airbag autonomous positioning assisted pressing system, which will not be repeated here.

[0058] The multi-airbag autonomous positioning and assisted compression system and method described above in this invention do not require medical personnel to assist in compression. Doctors only need to operate with one button to complete operations such as positioning, compression, force adjustment, and multi-airbag assistance. It is convenient, fast, efficient, well tolerated by patients, and greatly reduces labor costs.

[0059] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention. The above preferred features can be used in any combination without conflict.

Claims

1. A multi-balloon autonomous positioning assisted compression system for enteroscopy, characterized in that, The utility model relates to a kind of matrix air bag pressing mechanism for colonoscopy, including: An arch-shaped frame for providing support; An air bag pressing mechanism, including a matrix air bag and a fixed air bag, the matrix air bag is arranged on one side of the arch-shaped frame, including a plurality of sequentially arranged first air bags, the first air bag at a specified position is inflated to achieve pressing the abdomen of patient;The fixed air bag is arranged on the other side of the arch-shaped frame, and the fixed air bag is used to provide a reverse thrust for the patient; A magnetic ring positioning mechanism for obtaining the position information of the colonoscope in the human body and the position information of each first air bag relative to the colonoscope; A control mechanism determines the first air bag corresponding to the position to be pressed according to the position information of the colonoscope in the human body and the position information of each first air bag relative to the colonoscope, and controls the first air bag to be pressed at the corresponding position; The magnetic ring positioning mechanism includes: A first magnetic ring module inside the colonoscope for obtaining the position information of the colonoscope in the human body; A second magnetic ring module arranged at the four corners of the matrix air bag for obtaining the position information of each first air bag relative to the colonoscope; A receiver connected to the first magnetic ring module, the second magnetic ring module and the control mechanism respectively for sending the position information of the colonoscope in the human body and the position information of each first air bag relative to the colonoscope to the control mechanism; The magnetic ring coil of the first magnetic ring module is installed inside the colonoscope, and the second magnetic ring module is four magnetic ring coils distributed in the matrix air bag pressing system.

2. The multi-balloon autonomous positioning and assisted pressing system for enteroscopy according to claim 1, characterized in that, The matrix air bag includes a plurality of first air bags arranged in a matrix, and each first air bag is controlled by an independent electromagnetic valve.

3. The multi-balloon autonomous positioning and assisted pressing system for enteroscopy according to claim 2, characterized in that, The first air bag is in the form of a capsule.

4. The multi-balloon autonomous positioning and assisted pressing system for enteroscopy according to claim 2, characterized in that, Further including: A first air pump connected to the electromagnetic valve for supplying air to each first air bag; A second air pump for supplying air to the fixed air bag.

5. The multi-balloon autonomous positioning and assisted pressing system for enteroscopy according to claim 4, characterized in that, The control mechanism includes: A processor for determining the 3D shape of the colonoscope in the human body according to the position information of the colonoscope in the human body, thereby determining the position to be pressed by the colonoscope, and determining the first air bag closest to the position to be pressed according to the position information of each first air bag relative to the colonoscope; A controller for controlling the first air bag closest to the position to be pressed to inflate.

6. The multi-balloon autonomous positioning and assisted pressing system for enteroscopy according to claim 5, characterized in that, The controller controls the corresponding electromagnetic valve to inflate the first air bag at a specified position, and controls the power of the first air pump to control the strength of air pressure, thereby controlling the pressing force of the first air bag.

7. The multiple airbag autonomous positioning assisted compression system for enteroscopy according to claim 5, characterized in that, The processor is also used for observing the position change of the colonoscope in the human body in real time, thereby adaptively adjusting the first air bag to be inflated and the power of the first air pump, and performing combined pressing of a plurality of first air bags.

8. The multiple airbag autonomous positioning assisted compression system for enteroscopy according to claim 1, characterized in that, The fixed air bag is a single air bag.

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