JP2013074987A - Annular cartilage pressing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an annular cartilage presser device that can be inserted into the trachea of a patient only by an operator without a help of a care-giver.SOLUTION: The annular cartilage presser device 1 is composed of: a cylindrical protector 2 attached around a neck part so as to maintain a state that the head is bent backward and the jaw tip is lifted; a balloon part 4 arranged on the protector 2, which inflates by the filling of a pressurized fluid; and a pressing member 3 having projections 5 for pressing annular cartilages 13 of the neck part by the inflation of the balloon part 4.

Description

  The present invention relates to a cricoid cartilage compression device that secures openability during endotracheal intubation and prevents backflow of stomach contents.

  For example, when a patient whose cardiopulmonary function has stopped or general anesthesia is performed, a procedure for inserting a tube from the mouth or nose through the larynx to secure the airway (hereinafter referred to as tracheal intubation) is performed.

  If there is any residue in the patient's stomach during tracheal intubation (this condition is called Full Stomach), the residue will flow back from the esophagus and the vomit will flow into the trachea, causing suffocation or aspiration pneumonia. There is a risk of causing a disastrous situation. This situation also occurs in elderly patients when the muscle strength of the cardia (the part of the stomach near the entrance leading to the esophagus) decreases, when the esophagus is removed by esophageal cancer, and in patients who have a stent inserted into the esophagus. obtain. Furthermore, there is a risk of intubating the intubation tube into the esophagus by mistake even in normal waiting surgery.

  As a method for reducing such a risk, a cricoid cartilage compression method (also called a celic method) is currently being performed. The cricoid cartilage compression method is to compress the cricoid cartilage portion toward the back of the human body with the head bent back so that the patient's trachea can be seen during tracheal intubation (the following non-patent document) Reference 1).

Akifumi Omi, “Answering the simple question of anesthesiology training—What is the correct way to compress 10-ring cartilage?”, Medical Science International, Inc., May 1, 2006, p29-p31

  However, some patients have a short neck or depressed mandible, and in such patients, the tracheal opening cannot be ensured more than normal patients, and visual confirmation may not be possible. .

  In addition, the cricoid cartilage compression method is a so-called sniffing position in which the patient's head is bent backward and the chin point is raised so that the trachea can be seen from the mouth, in addition to the technique of compressing the cricoid cartilage. It may be necessary to maintain the position taken when the larynx is deployed. However, compression of the cricoid cartilage and holding of the sniffing position cannot be performed by a single operator, and the assistant presses the cricoid cartilage while raising the patient's chin and bending the head, and the operator The trachea is confirmed from the patient's mouth while holding the tube to be inserted.

  In this case, since the compression of the cricoid cartilage is performed by the sense of the assistant, the assistant needs to perform training to develop the sense of the compression force. Further, it is difficult to communicate how much the cricoid cartilage should be compressed between the technician and the assistant, and the cricoid cartilage may not be compressed accurately. Furthermore, there is a problem that the cricoid cartilage compression method cannot be performed unless there is a helper in addition to the operator, and cannot be performed by the operator alone in an emergency.

  Therefore, an object of the present invention is to provide a cricoid cartilage compression device that does not require an assistant and can be inserted into a patient's trachea even by an operator alone.

The above object is achieved by the following means.
(1) A cylindrical protector attached to the periphery of the neck so as to hold the state where the head is bent backward and the jaw tip is raised, and the protector is provided, and expands by filling with a pressurized fluid. A cricoid cartilage compression device comprising: a balloon part; and a compression member having a protruding part that compresses cricoid cartilage of the neck by expansion of the balloon part.
(2) The cricoid cartilage compression device further includes a pressure detection unit that detects pressure during cricoid cartilage compression by the compression member, and a display unit that displays pressure during compression detected by the pressure detection unit. The cricoid cartilage compression device according to (1), wherein
(3) The annular cartilage compression device according to (1) or (2), wherein the protector has an angle adjustment mechanism that adjusts an angle at which the head is bent backward.
(4) The protector includes a pair of halved pieces, and the halved pieces are connected to each other via a circumferential length adjusting mechanism capable of adjusting a distance between the halved pieces. The cricoid cartilage compression device according to any one of 1) to (3).
(5) The annular cartilage compression device according to any one of (1) to (4), wherein the protector and the compression member are configured separately.
(6) The cricoid compression device according to any one of (1) to (5), wherein the projection includes a first projection and a second projection straddling the cricoid cartilage of the neck. .
(7) The cricoid cartilage compression device according to (6), wherein the first protrusion and the second protrusion have different heights.
(8) The annular cartilage compression device according to (6) or (7), wherein the protrusion extends along the axial direction of the protector.
(9) The balloon unit is configured by a transparent body so that the first protrusion and the second protrusion can be visually recognized from the outside, (6) to (8), Annular cartilage compression device.

  According to the first aspect of the present invention, the cylindrical protector is attached around the neck, the balloon provided on the protector is inflated, and the annular cartilage is compressed by the protrusion of the compression member. Even if an assistant is not required, the esophagus can be closed only by a technician, and the openness of the trachea can be secured while preventing the backflow of the stomach contents.

  According to the invention described in claim 2, since the cricoid cartilage compression device is provided with a pressure detection unit that detects the compression pressure of the cricoid cartilage by the protrusion, and a display unit that displays the pressure detected by the pressure detection unit, It is possible to prevent the trachea from being blocked by excessively pressing the cricoid cartilage. In addition, since the tracheal intubation can be performed by quickly grasping the pressure value for compressing the cricoid cartilage, the work efficiency of the procedure can be improved.

  According to the third aspect of the present invention, the angle adjustment mechanism for adjusting the angle at which the head is bent backward is provided, so that individual differences in the length of the neck and the length of the jaw are absorbed and various patients are accommodated. Can be fitted with a cricoid cartilage compression device.

  According to the invention described in claim 4, since the protector is composed of a pair of halved pieces, and the cervical circumference adjustment mechanism is provided at both the left and right ends of the halved piece, There is no need to divide into several types, which can contribute to cost reduction. Moreover, since it is necessary to make the compression member coincide with the position of the throat Buddha, disagreement between the compression member and the throat Buddha due to the adjustment of the circumference can be prevented by providing adjustment mechanisms at both left and right ends.

  According to the invention described in claim 5, since the protector and the compression member are configured separately, even if there are individual differences in the shape of the cricoid cartilage, it can be dealt with only by replacing the compression member. It can also be. Therefore, the replacement cost of the cricoid cartilage compression device can be reduced.

  According to the sixth aspect of the present invention, since the compression member has the first and second protrusions straddling the cricoid cartilage of the cervical portion, the throat and the Buddha are not crushed as in the case of being compressed by the finger. The cricoid cartilage can be compressed, and other parts are not unnecessarily compressed.

  According to the seventh aspect of the present invention, since the height of the first protrusion and the second protrusion is changed so that the cricoid cartilage is brought closer to the lingual side in consideration of the position of the human tongue, the trachea from the mouth Visibility can be improved.

  According to invention of Claim 8, since the projection part is extended along the axial direction, the individual difference of the position in the height direction of cricoid cartilage can be absorbed.

  According to the ninth aspect of the present invention, since the projection portion other than the balloon portion, the first projection, and the second projection is transparent, the position of the throat Buddha is set to the first projection and the second projection when the protector is attached to the neck. It becomes easy to visually recognize by the color of the protrusion, and the work efficiency at the time of mounting can be improved.

It is sectional drawing of the neck vicinity in the height direction of a human body. It is a side view at the time of making the patient wear the cricoid cartilage compression device concerning one embodiment of the present invention. FIG. 3 is a plan view of FIG. 2. It is sectional drawing of the circumference adjustment mechanism part of a neck part. It is a modification of an angle adjustment mechanism. FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. It is a modification of a compression member. It is a perspective view of the projection part concerning one embodiment of the present invention. It is a block diagram shown about the structure of the control system of the cricoid cartilage compression device which concerns on one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the following description does not limit the technical scope and terms used in the claims. In addition, the dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from actual ratios.

  Generally, the cricoid cartilage compression method is used for patients who have fallen into a coma and whose cardiopulmonary function has stopped, or to secure the airway when general anesthesia is applied. In this method, as shown in FIG. 1, in order to secure a sniffing position from a state in which the patient is lying on his back, the head is first bent backward and the chin tip is raised. When the cricoid cartilage 13 at the lower end of the thyroid cartilage 14 (so-called throat Buddha) is pressed with the thumb and forefinger, the trachea 12 surrounded by the cricoid cartilage 13 is not crushed, and the esophagus 11 is pressed against the cervical spine to become an obstructed state. From the stomach to the trachea 12 is prevented, and the opening of the trachea 12 is ensured. When the laryngoscope 15 is inserted in this state, the development of the larynx can be confirmed, and tracheal intubation is performed.

  The general pressure is 10 N (≈1 kgf) at awakening, 30 N (≈3 kgf) at the time of loss of consciousness, and rapid introduction of anesthesia for pregnant women, children, and obese patients (Rapid Sequence Induction). Done.

  2 is a side view when the cricoid cartilage compression device according to one embodiment of the present invention is attached to a patient, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a cross-sectional view of a cervical circumference adjustment mechanism. is there.

  2 and 3, the cricoid cartilage compression device 1 has the patient in a supine state, with the head H on the right side and the trunk B on the left side, the head is bent backward, and the chin tip is raised. A cylindrical protector 2 that is attached to the periphery of the neck so as to maintain the closed state, a balloon 4 that is provided in the protector 2 and inflates by filling with a pressurized fluid, and an annular cartilage of the neck by inflating the balloon 4 And a pressing member 3 having a protruding portion 5 that presses 13.

  As shown in FIG. 2, the protector 2 is composed of an upper protector 21 and a lower protector 22 configured by a pair of upper and lower halves, a circumferential length adjusting mechanism S including a circumferential length adjusting belt 23 and a stopper 24, an angle An angle adjusting mechanism K including an adjusting belt 25 and a stopper 26 is provided.

  When both protectors 21 and 22 are attached to the neck, the upper protector 21 has a cylindrical shape so that the trachea can be visually recognized from the mouth by raising the chin tip forward of the human body and bending the head backward. Along the axis, the lower protector 22 is formed in a flared shape extending from the central portion to the chin tip portion at the time of wearing, and the lower protector 22 is formed in a flared shape extending from the central portion to the occipital region at the time of wearing.

  In addition, the upper protector 21 is formed in a flared shape from the center to the front of the shoulder at the time of wearing so that the head can be kept in close contact with the shoulder at the time of wearing and the head is bent backward, and the lower protector 22 is formed. Is formed in a flared shape from the center to the back of the shoulder when worn.

  Thus, both the protectors 21 and 22 are formed so that the central part corresponding to the neck part is narrowed from the upper end part to the central part and from the lower end part to the central part according to the shape of the human body, as shown in FIG. Thus, the angle R1 formed by the upper piece and the lower piece in the upper protector 21 is, for example, not less than 100 degrees and less than 180 degrees.

  On the other hand, the angle R2 formed by the upper piece and the lower piece in the lower protector 22 is not less than 75 degrees and less than 145 degrees. In a normal posture, the mouth portion and the trachea portion are approximately 90 degrees and the trachea cannot be visually recognized from the mouth. Therefore, the protector 2 is formed so that the angle R2 is smaller than the angle R1 in order to bend the head.

  As shown in FIG. 4, the circumference adjusting mechanism S that changes the circumference of the protector 2 stepwise is an inclined surface 231 in the insertion direction of the left and right ends on the upper protector 21 side, and a vertical surface that prevents the attachment in the attachment / detachment direction. And a stopper 24 provided with inclined surfaces 241 and vertical surfaces 242 that engage with the circumferential length adjusting belt 23 at both left and right end portions on the lower protector 22 side. It is composed of

  With the circumference adjusting belt 23 and the stopper 24, it is not necessary to produce various protectors 2 according to the circumference of the neck, and the production cost can be reduced. Further, as will be described later, since the compression member 3 needs to coincide with the position of the cricoid cartilage 13, the circumferential length adjusting mechanism S is provided at both the left and right ends, so that the compression member 3 and the cricoid cartilage 13 by adjustment are provided. Inconsistency can be prevented.

  The circumference adjusting mechanism S is not limited to the above, and may be constituted by a Velcro fastener including a hook and a loop, for example.

  The lower protector 22 is provided with an angle adjustment mechanism K that can adjust the backward bending angle of the head relative to the neck in a stepwise manner. The angle adjusting mechanism K includes the angle adjusting belt 25 having the inclined surfaces 231 and 241 and the vertical surfaces 232 and 242 similar to the circumference adjusting mechanism S and the stopper 26.

  The angle adjustment belt 25 and the stopper 26 can adjust the angle according to individual differences in the length of the neck and the height of the jaw, and can reduce costs without increasing the number of types of protectors.

  FIG. 5 is a view showing a modification of the angle adjusting mechanism. In addition to the above, the angle adjusting mechanism K may be firmly fixed by adjusting the circumference of the neck using an engaging means whose tip portions are constituted by metal claws 233 and 243.

  The protector 2 can hold the posture of the head with respect to the neck and is made of a latex-free material such as plastic or polypropylene in consideration of allergies to the skin.

  At the front center portion of the upper protector 21, a notch O to which a compression member 3 described later with reference to FIG. 6 can be attached is formed.

  6 is a cross-sectional view taken along line 6-6 of FIG.

  As shown in FIG. 6, the compression member 3 includes a balloon portion 4 and a projection portion 5. At the center of the upper protector 21, the balloon portion 4 is inflated to compress the cricoid cartilage 13 via the projection portion 5. It is fitted into the notch O provided and fixed with an adhesive or the like.

  The balloon portion 4 includes an outer skin 41 and an inner skin 42, and a crescent (crescent moon) -like expansion space 43 is formed therein.

  In the expansion space 43, a tube (not shown) or the like for injecting a pressurized fluid to be pressurized from the outside in a state where the compression member 3 straddles the cricoid cartilage 13 is continuously provided.

  The thickness A1 in the radial direction of the balloon part 4 is, for example, 0.1 cm to 0.5 cm when the balloon part 4 is not expanded. The inner skin 42 is formed thinner than the outer skin 41 so that the deformation amount of the inner skin 42 is larger than that of the outer skin 41 when the cricoid cartilage 13 is compressed by the compression member 3. Further, the inner skin 42 and the outer skin 41 may have the same thickness. In that case, it is preferable that the rigidity of the outer skin material is higher than that of the inner skin material. The balloon portion 4 is made of a transparent body so that it can be visually confirmed whether or not the compression member 3 that is compressed in a state of straddling the cricoid cartilage 13 is attached to the cricoid cartilage 13. Examples of the material constituting the balloon portion 4 include polystyrene, polyolefin (eg, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, cross-linked ethylene-vinyl acetate copolymer), polyvinyl chloride, and polyamide. Use a thermoplastic resin such as polyamide elastomer, polyurethane, polyurethane elastomer, polyimide, polyester (eg, polyethylene terephthalate), polyarylene sulfide (eg, polyphenylene sulfide), elastically deformable material such as silicone rubber, latex rubber, etc. Is preferred.

  FIG. 7 is a cross-sectional view showing a modification of the balloon portion. As another configuration of the balloon portion 4, a balloon 44 made of rubber that can be expanded and contracted is provided in a space formed by the outer skin 41 and the inner skin 42. In this modified example, the balloon 44 is filled with a pressurized fluid so that the space formed by the outer skin 41 and the inner skin 42 is expanded.

  FIG. 8 is a perspective view of a protrusion according to an embodiment of the present invention.

  As shown in FIG. 8, the protrusion 5 includes a first protrusion 51 and a second protrusion 52 simulating the shape of a finger compressing the cricoid cartilage 13, and a fixing surface 53 fixed to the balloon part 4 with an adhesive or the like. The inside is hollow and filled with a gas such as nitrogen. The recess located between the first protrusion 51 and the second protrusion 52 is formed so as to substantially match the shape of the cricoid cartilage 13. A pressure detection sensor constituting the pressure detection unit 9 is attached to the first protrusion 51 and the second protrusion 52.

  Specifically, the width A2 of the protrusion 5 is 0.5 to 5 cm, the length A3 in the height direction (of the patient) is 0.5 to 5 cm, and the height A4 from the fixing surface 53 to the recess of the protrusion 5 is The height difference A5 between 0 to 10 cm and the first protrusion 51 and the second protrusion 52 is 0.3 to 3.0 cm. The above dimensions are assumed for an adult male, but are appropriately adjusted for females, children and the like.

  As shown in FIG. 8, the first protrusion 51 and the second protrusion 52 are formed so that the first protrusion 51 is higher than the second protrusion 52 on the assumption that the first protrusion 51 and the second protrusion 52 are pressed by the thumb and the index finger.

  Since each of the protrusions 51 and 52 has a shape along the cricoid cartilage 13, it is compressed in a state where it straddles the cricoid cartilage 13 without crushing the thyroid cartilage 14, as in the case of compression with a finger. It can be done and does not unnecessarily squeeze other parts.

  The protrusion 5 is formed so as to extend along the height direction of the patient, so that individual differences in the position of the cricoid cartilage 13 can be absorbed. In the compression member 3, it is preferable that the protrusions 51 and 52 are colored with an easily visible pigment or the like, and the protrusions 5 and the balloon part 4 other than the protrusions 51 and 52 are configured as a transparent body.

  Thereby, when attaching the protector 2 to a neck part, the position of the processus | protrusions 51 and 52 with respect to the position of the cricoid cartilage 13 can be visually recognized, and the working efficiency at the time of mounting | wearing can be improved. As the material constituting the protrusions 5, it is preferable to use silicone, urethane or latex rubber and olefin or styrene elastomer.

  Moreover, the protector 2 and the compression member 3 are comprised separately. For this reason, even if there is an individual difference in the shape of the cricoid cartilage 13, it can be dealt with only by replacing the compression member 3, and the compression member 3 can be made disposable. Therefore, the replacement cost of the cricoid cartilage compression device 1 can be reduced.

  In addition, the balloon part 4 and the protrusion part 5 may be comprised as an integral part which match | combined both shape, and the protrusion part 5 may be comprised with a solid body.

  FIG. 9 is a block diagram showing the configuration of the control system for the cricoid cartilage compression device according to one embodiment of the present invention.

  As shown in FIG. 9, the control system for the cricoid cartilage compression device 1 includes a control unit 6, an operation unit 7, a pressure generation unit 8, a pressure detection unit 9, and a display unit 10.

  The control unit 6 includes a CPU, a RAM, a ROM, and the like, and is provided in the same device as the operation unit 7 and the display unit 10. The operation unit 7 is configured with a keyboard, a touch panel, or the like so that the operator can specify the limit pressure value to be compressed using the cricoid cartilage compression device 1 and instruct to load or stop the load. The pressure generating unit 8 is configured by a pump or the like so as to supply a predetermined flow rate of air pressure to the annular cartilage compression device 1. The pressure generating unit 8 may be one that manually operates a rubber ball and sends air.

  The pressure detection unit 9 includes, for example, an air dynamic pressure sensor, and is provided on the protrusions 51 and 52 of the protrusion 5 as described above. The pressure may be detected visually by using pressure sensitive paper in addition to the air dynamic pressure sensor.

  The display unit 10 is configured by a liquid crystal display or the like so that the pressure value applied to the cricoid cartilage 13 detected by the pressure detection unit 9 is expressed in mmHg, Pa, or the like.

  Thus, by providing the pressure detection unit 9 that detects the compression pressure applied by the compression member 3 and the display unit 10 that displays the detected pressure value, the trachea is occluded by excessively pressing the cricoid cartilage 13. Can be prevented. In addition, since the tracheal intubation can be performed by quickly grasping the pressure value that compresses the cricoid cartilage 13, the work efficiency of the procedure can be improved.

  Next, the operation of the cricoid cartilage compression device 1 according to this embodiment will be described.

  The operator attaches the cricoid cartilage compression device 1 according to the present embodiment to the patient with the patient lying on his back. In the attachment, the upper protector 21 and the lower protector 22 are brought close to the neck of the patient, the circumference of the protector 2 is adjusted by the circumference adjusting belt 23 and the stopper 24, and the head is adjusted by the angle adjusting belt 25 and the stopper 26. This is done by adjusting the back bending angle. Thereby, the cricoid cartilage compression device 1 is attached to the patient, and a sniffing position is formed.

  The operator stands on the patient's head, opens the patient's mouth using a laryngoscope, observes it, and operates the operation unit 7 to specify the pressure limit pressure value and perform pressure increase. When an increase in pressure is instructed from the control unit 6, a pressurized fluid such as nitrogen is supplied to the balloon unit 4 via wiring such as a tube, and the balloon unit 4 is inflated. When the balloon part 4 is pressurized by the pressure generating part 8, the thickness A1 of the balloon part 4 shown in FIG. 6 is further expanded by about 0.3 cm to 5 cm from the non-expanded state.

  The compression member 3 compresses the cricoid cartilage 13 by the expansion of the balloon portion 4. Since the first protrusion 51 is higher than the second protrusion 52, the first protrusion 51 slides against the skin as compared with the second protrusion 52 during compression, and the second protrusion 52 predominantly compresses the cricoid cartilage 13. As a result, the compression member 3 compresses the cricoid cartilage 13 to the right side when the operator faces the front of the patient. Since the human tongue is located on the left side from the center, that is, on the right side when the operator faces the front of the patient, the cricoid cartilage 13 is pressed against the lingual side to improve the visibility of the trachea from the mouth. be able to.

  The pressure compressed by the compression member 3 is detected by the pressure detection unit 9, is subjected to arithmetic processing by the control unit 6, and the pressure value is displayed on the display unit 10. The operator confirms the degree of opening of the trachea from the mouth with reference to the pressure value of the display unit 10, operates to stop the pressurization from the operation unit 7 when the opening is sufficient, and confirms from the mouth using a laryngoscope. , And perform tracheal intubation.

  The compression member 3 compresses the cricoid cartilage 13 due to the expansion of the balloon part 4, but the trachea part is surrounded by the annular cricoid cartilage 13, so that it does not collapse unless the compression pressure is excessive, and the esophagus part is partially It is occluded and the backflow of contents from the stomach is prevented.

  Note that the thickness of the balloon portion 4 that increases due to inflation is only a guideline, and the final determination of whether or not to perform tracheal intubation is made by visually observing whether the trachea can be seen from the mouth of the operator.

  According to the cricoid cartilage compression device 1 according to the present embodiment, the protector 2 is attached around the neck, the balloon 4 is inflated, and the cricoid cartilage 13 is moved by the first projection 51 and the second projection 52 of the projection 5. I'm under pressure. For this reason, even if an assistant other than the operator is not required as in the prior art, only the operator can block the esophagus to prevent backflow of the contents of the stomach and ensure the opening of the trachea.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims.

  In the above embodiment, assuming that the first protrusion 51 and the second protrusion 52 of the protrusion 5 press the cricoid cartilage 13 with the conventional thumb and index finger, the first protrusion 51 is formed higher than the second protrusion 52. Described. However, since it is possible to assume a case where friction with the skin hardly occurs depending on the material of the protrusion 5, the first protrusion 51 and the second protrusion 52 may have the same height.

1 cricoid cartilage compression device,
2 protectors,
3 compression members,
4 Balloon part,
5 protrusions,
6 Control unit,
7 Operation part,
8 Pressure generator,
9 Pressure detector,
10 display part 11 esophagus,
12 Trachea,
13 cricoid cartilage,
14 Thyroid cartilage,
15 laryngoscope,
21 Upper protector,
22 Lower protector,
23 circumference adjustment belt,
24 stopper,
25 Angle adjustment belt,
26 stopper,
41 outer skin,
42 endothelium,
43 Expansion space,
44 Balloon,
51 1st protrusion,
52 second protrusion,
53 fixed surface,
231 inclined surface,
232 vertical plane,
233 nails,
241 inclined surface,
242 vertical plane,
243 nails,
A1 Thickness in the radial direction of the balloon part,
A2 Width of protrusion,
A3 Length of the protrusion in the height direction (of the patient)
A4 Height from the fixed surface of the protrusion to the recess,
A5 Difference in height between the first protrusion and the second protrusion,
B trunk,
H head,
O notch,
R1 The angle between the upper piece and the lower piece in the upper protector,
R2 Angle formed by the upper and lower pieces in the lower protector.

Claims (9)

A cylindrical protector attached around the neck to hold the state where the head is bent backward and the tip of the chin raised.
A balloon portion provided in the protector and inflated by filling with a pressurized fluid; and
A compression member having a protrusion that compresses the cricoid cartilage of the neck by inflating the balloon portion;
An annular cartilage compression device consisting of   The cricoid cartilage compression device is further provided with a pressure detection unit that detects pressure during cricoid cartilage compression by the compression member, and a display unit that displays pressure during compression detected by the pressure detection unit. The cricoid cartilage compression device according to claim 1.   The cricoid cartilage compression device according to claim 1 or 2, wherein the protector has an angle adjustment mechanism that adjusts an angle at which the head is bent backward.   The protector comprises a pair of halved pieces, and the halved pieces are connected to each other via a circumferential length adjusting mechanism capable of adjusting a distance between the halved pieces. 4. The cricoid cartilage compression device according to any one of 3 above.   The cricoid cartilage compression device according to any one of claims 1 to 4, wherein the protector and the compression member are configured separately.   6. The cricoid cartilage compression device according to claim 1, wherein the projection includes a first projection and a second projection straddling the cricoid cartilage of the neck.   The cricoid cartilage compression device according to claim 6, wherein the first protrusion and the second protrusion have different heights.   The cricoid cartilage compression device according to claim 6 or 7, wherein the protrusion extends along the axial direction of the protector.   The annular balloon cartilage compression device according to any one of claims 6 to 8, wherein the balloon portion is configured by a transparent body so that the first protrusion and the second protrusion can be visually recognized from the outside.