A visual positioning cricothyroid membrane puncture kit

Abstract

This utility model discloses a visual positioning cricothyroid membrane puncture kit, including a detachably connected cannula assembly and a puncture needle assembly. The cannula assembly includes a cannula, a base, and a fixing strap. The cannula is disposed on the base, and the fixing strap is detachably connected to the base. The puncture needle assembly includes a hollow seat, a puncture needle tube, a needle core, a spring, and an indicator block. The puncture needle tube is disposed at the front end of the hollow seat, and the front opening of the puncture needle tube is a needle tip puncture portion formed by a beveled structure. The spring and the indicator block are located inside the hollow seat. The needle core is slidably inserted into the puncture needle tube, and the length of the needle core is greater than the length of the puncture needle tube, with its front end extending out to form the needle tip puncture portion. The rear end of the needle core abuts against the spring or the indicator block to form a linkage state. This utility model provides full visualization, enabling precise positioning and preventing errors, and reducing reliance on experience in operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a visual positioning cricothyroid membrane puncture kit. Background Technology

[0002] Cricothyroid membrane puncture is a life-saving procedure in clinical emergency care. Its core objective is to establish a temporary airway by penetrating the cricothyroid membrane (the elastic tissue between the thyroid cartilage and cricoid cartilage). Traditional cricothyroid membrane puncture tools (such as the "puncture needle + cannula" combination) have the following shortcomings: First, blind puncture carries high risks: relying on the operator's "feel" to judge the puncture depth can easily lead to damage to the posterior tracheal wall, blood vessels, or nerves due to excessively deep punctures. According to a 2023 report in the *Chinese Journal of Emergency Medicine*, the complication rate is approximately 30%. It is also prone to failure due to punctures being too shallow and failing to enter the trachea, with a failure rate of approximately 20%. Secondly, a second intubation is required: The traditional puncture procedure is "puncture needle → withdrawal of needle core → push cannula", which involves many steps (about 3-5 steps), increasing the risk of infection (infection rate of about 15%). Furthermore, the second intubation can easily damage the tracheal wall. According to a 2022 report in the Journal of Practical Surgery, about 10% of patients suffered tracheal wall abrasions due to the second intubation. High operational difficulty: Novices find it difficult to grasp the "sense of breakthrough" based on the changes in resistance during cricothyroid membrane penetration, requiring 1-2 months of training, resulting in a long training cycle and making it unsuitable for the "rapid operation" requirements of emergency scenarios.

[0003] To address the aforementioned issues, there is an urgent need for a visually oriented, one-step, and simple-to-operate cricothyroid membrane puncture tool to lower the operational threshold, increase the success rate, and simultaneously reduce damage and infection risk. Utility Model Content

[0004] The purpose of this invention is to provide a visual positioning cricothyroid membrane puncture kit, which aims to improve the problems of existing cricothyroid membrane puncture tools, such as high operation threshold, low success rate, easy to cause secondary damage and high risk of infection.

[0005] To achieve the above objectives, according to one aspect of the present invention, a visual positioning cricothyroid membrane puncture kit is provided, comprising a detachably connected cannula assembly and a puncture needle assembly. The sleeve assembly includes a sleeve, a base, and a fixing strap. The sleeve is disposed on the base, and the fixing strap is detachably connected to the base. The puncture needle assembly includes a hollow base, a puncture needle tube, a needle core, an indicator block, a spring, and a fixing cap. The puncture needle tube is located at the front end of the hollow base, and the opening at the front end of the puncture needle tube is a needle tip puncture portion formed by a beveled structure. The indicator block and the spring are located inside the hollow base, and the fixing cap is located at the rear end of the hollow base. The needle core is slidably inserted into the puncture needle tube, and the length of the needle core is greater than the length of the puncture needle tube, with its front end extending out to form the needle tip puncture portion. The rear end of the needle core abuts against the spring or the indicator block to form a linkage state. The surface of the indicator block is provided with at least two sets of different warning colors. A transparent area is provided on the hollow base, and the indicator block, in conjunction with the transparent area, displays the changes in the puncture depth and puncture position of the needle tip puncture portion.

[0006] Furthermore, the two sets of different warning colors on the indicator block form a first warning area and a second warning area from front to back. The widths of the first warning area and the second warning area may be the same or different, and the width of the transparent area is the same as the width of the first warning area or the second warning area.

[0007] Furthermore, the indicator block is located at the rear end of the needle core or the rear end of the spring, and the tail end of the needle core is provided with a pusher. The limiting platform is located inside the hollow seat. The pusher is used to limit the needle core when it is in the initial state. In the initial state, the front end of the needle core protrudes a safe distance outside the needle tip of the puncture needle tube, and the front end of the needle core has no sharp edges.

[0008] Furthermore, the first warning area is coated in red, the second warning area is coated in blue, and the length of the second warning area is the same as the safe distance at which the needle core protrudes from the needle tip puncture site in the initial state.

[0009] Furthermore, the safety distance is set according to the target age group: 2-3mm for infants, 3-4mm for children, and 4-6mm for adults; the length of the first warning zone is the same as the length of the needle tip of the puncture needle, and the length of the transparent observation window is the same as the length of the first warning zone.

[0010] Furthermore, the cannula is made of medical-grade metal or medical-grade non-metallic materials, and its inner diameter, outer diameter, and length are set according to the target age group and type: Infant and toddler jet type: inner diameter 1.4mm±0.1mm, outer diameter 1.6mm±0.1mm, length 40mm±2mm; Children's jet type: inner diameter 1.8mm±0.1mm, outer diameter 2.0mm±0.1mm, length 50mm±2mm; Adult jet type: inner diameter 2.2mm±0.1mm, outer diameter 2.4mm±0.1mm, length 65mm±2mm; Non-jet ventilated type for ages 12 and up: inner diameter 3.5mm±0.1mm, outer diameter 4.0mm±0.1mm, length 60mm±2mm.

[0011] Furthermore, the base has connecting holes at both ends, and the fixing strap has through strips at both ends. The end of the through strip away from the fixing strap has a hook and loop fastener, and the through strip also has a loop fastener. The through strip passes through the connecting holes of the base and attaches its hook and loop fastener to the loop fastener to connect the fixing strap to the base.

[0012] Furthermore, the puncture needle is made of medical-grade metal or non-metal materials, the outer diameter of the puncture needle is smaller than the inner diameter of the cannula, and the difference between the two is less than or equal to 0.1 mm, and the proximal end of the beveled surface of the puncture needle is flush with the front end of the cannula.

[0013] Furthermore, the spring has an elastic coefficient of 1.5-2.5 N / mm, the needle core is made of medical-grade metal material, the outer diameter of the needle core is smaller than the inner diameter of the puncture needle tube, and the difference between the two is less than or equal to 0.1 mm, and the front end of the needle core is provided with a smooth rounded corner with a radius of 1.3-2 mm.

[0014] Furthermore, the hollow seat is cylindrical, and its transparent area is a rectangular opening on the cylindrical wall of the hollow seat and a transparent window installed in the opening; or the hollow seat is made of transparent material, and an opaque film is wrapped around the front cylindrical wall of the hollow seat, and the transparent cylindrical wall of the hollow seat located behind the opaque film forms a transparent area.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model is equipped with a needle core, a spring, an indicator block, and a transparent area. By observing the "appearance-disappearance-reappearance" of the indicator block in the transparent area and the color of the appearance, the position of the needle tip can be determined in real time, achieving visual positioning, avoiding blind puncture, and achieving a puncture success rate of ≥98%, which is far higher than the 70%-80% success rate that experienced operators can achieve using traditional methods.

[0016] 2. The cannula of this utility model is pre-fixed and inserted together with the puncture needle. After puncture, the puncture needle can be directly withdrawn, shortening the operation time to less than 1 minute, which is much less than the 2-3 minutes required by the traditional method. Moreover, there is no need for secondary insertion of the cannula, so the complication rate is ≤2%, which is much less than the 30% complication rate of the traditional method.

[0017] 3. The puncture structure, indicator block, and transparent area of ​​this utility model are similar to those of an indwelling needle, and the observation method is the same, making the operation simple and easy to master. The training time for novices is shortened to within 1 week, which is much shorter than the 1-2 months of training time required by traditional methods. It is suitable for emergency scenarios in medical institutions at all levels.

[0018] 4. The materials used in this utility model are safe and have good compatibility. The cannula can be made of medical-grade metal or non-metal materials, and all other components are made of medical-grade metal materials, which comply with the GB 4234-2019 medical-grade standard. The plastic parts are made of PP material, which is non-toxic and heat-resistant, and is compatible with existing emergency equipment such as ventilators, oxygen concentrators, simple respirators, and jet ventilation devices.

[0019] 5. This utility model precisely sets the cannula parameters according to different age groups, covering all age groups from infants to adults, achieving precise adaptation for each age group and improving operational safety. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the visual positioning cricothyroid membrane puncture kit provided by this utility model; Figure 2 This is a three-dimensional structural diagram of the cannula assembly of the visual positioning type cricothyroid membrane puncture kit provided by this utility model; Figure 3 This is a three-dimensional structural diagram of the puncture needle assembly of the visual positioning cricothyroid membrane puncture kit provided by this utility model (part of the shell of the hollow seat has been removed to show the internal structure). Figure 4 This is a cross-sectional schematic diagram of the puncture needle assembly of the visual positioning cricothyroid membrane puncture kit provided by this utility model; Figure 5 yes Figure 1 Enlarged view of region A in the middle; Figure 6 This is a schematic diagram of the structure of the indicator block of this utility model; Figure 7 This is a schematic diagram showing the relative positions of the indicator blocks visible through the transparent observation window when performing cricothyroid membrane puncture using the visual positioning cricothyroid membrane puncture kit provided by this utility model, under different puncture states.

[0021] Reference numerals: 1. Sleeve; 2. Base; 3. Fixing strap; 4. Hollow seat; 5. Puncture needle; 6. Needle core; 7. Spring; 8. Fixing cap; 9. Indicator block; 901. First warning zone; 902. Second warning zone; 61. Push table; 10. Transparent zone. Detailed Implementation

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: Example 1 like Figures 1-3 As shown, this embodiment provides a visually positioned cricothyroid membrane puncture kit, including a detachably connected cannula assembly and a puncture needle assembly. The cannula assembly includes a cannula 1, a base 2, and a fixing strap 3. The cannula 1 is made of medical-grade metal or non-metal materials. The base 2 is made of PP plastic. Each end of the base 2 has a connecting hole. Each end of the fixing strap 3 has a through strip. The end of the through strip away from the fixing strap 3 has a hook and loop fastener. The through strip passes through the connecting hole of the base 2 and attaches its hook and loop fastener to the loop fastener to connect the fixing strap 3 to the base 2. A mounting seat is provided in the middle of the base 2, and the mounting seat has a mounting through hole. The cannula 1 passes through the mounting through hole of the mounting seat. The cannula 1 is made of medical-grade metal or non-metal materials, and its front end is designed with an angle. The inner diameter, outer diameter, and length of the cannula 1 are set according to the target age group and type: Infant and toddler jet type: inner diameter 1.4mm±0.1mm, outer diameter 1.6mm±0.1mm, length 40mm±2mm; Children's jet type: inner diameter 1.8mm±0.1mm, outer diameter 2.0mm±0.1mm, length 50mm±2mm; Adult jet type: inner diameter 2.2mm±0.1mm, outer diameter 2.4mm±0.1mm, length 65mm±2mm; Non-jet ventilated type for ages 12 and up: inner diameter 3.5mm±0.1mm, outer diameter 4.0mm±0.1mm, length 60mm±2mm.

[0024] like Figure 1 , Figures 3-5As shown, the puncture needle assembly includes a hollow base 4, a puncture needle tube 5, a needle core 6, a spring 7, and a fixing cap 8. The hollow base 4 is cylindrical and made of PP plastic. The puncture needle tube 5 is made of medical-grade metal. The outer diameter of the puncture needle tube 5 is smaller than the inner diameter of the cannula 1, and the difference between the two is less than or equal to 0.1 mm. The front opening of the puncture needle tube 5 is a beveled section forming the needle tip puncture part, and the proximal end of the beveled section at the front end of the puncture needle tube 5 is flush with the front port of the cannula 1. The needle core 6 is also made of medical-grade metal. The outer diameter of the needle core 6 is smaller than the inner diameter of the puncture needle tube 5, and the difference between the two is less than or equal to 0.1 mm. The front end of the needle core 6 has a smooth rounded corner with a radius of 1.3-2 mm, which ensures that the front end of the needle core 6 has no sharp edges, thereby reducing damage to the human body. The spring 7 has a wire diameter of 0.2-0.45mm, an inner diameter of 2-4mm, a length of 10-50mm, and a total of 13 coils. The spring constant of the spring 7 is 1.5-2.5N / mm. The spring 7 is used to provide elastic restoring force to ensure the resistance sensing sensitivity.

[0025] like Figure 1 , Figure 3 and Figure 4As shown, the puncture needle 5 is located at the front end of the hollow seat 4, and the two are connected internally. The hollow seat 4 has an opening at the rear end and includes a fixing cover 8, which is detachably connected to the rear end of the hollow seat 4. The needle core 6 is inserted into the puncture needle tube 5 through the hollow seat 4. The spring 7 and the indicator block 9 are located inside the hollow seat 4. The needle core 6 is slidably inserted into the puncture needle tube 5. The length of the needle core 6 is greater than the length of the puncture needle tube 5, and its front end extends out to form a needle tip puncture part. The rear end of the needle core 6 abuts against the spring 7 or the indicator block 9 to form a linkage state. The indicator block 9 is located at the rear end of the needle core 6 or the rear end of the spring 7. A pusher 61 is provided at the tail end of the needle core 6. In this embodiment, the pusher 61 abuts against the indicator block 9. The limiting platform 61 is located inside the hollow seat 4. The pusher 61 is used to limit the needle core 6 when it is in the initial state. In the initial state, the front end of the needle core 6 protrudes a safe distance outside the needle tip puncture part of the puncture needle tube 5. The front end of the needle core 6 has no sharp edges. The surface of the indicator block 9 is provided with at least two different warning colors. A transparent area 10 is provided on the core 4, with opaque areas on the left and right sides. An indicator block 9, in conjunction with the transparent area 10, displays the insertion depth and position of the needle tip. Initially, the indicator block 9 is located in the opaque area at the front end of the transparent area 10. As the needle tip of the puncture needle 5 pierces the body, the needle core 6 slides backward, simultaneously moving the indicator block 9 towards the transparent area 10. The insertion depth is indicated by observing the change in the warning color position displayed on the indicator block 9 in the transparent area. A spring 7 is positioned in front of or behind the indicator block 9. In this embodiment, the spring 7 is located behind the indicator block 9, with the tail end of the needle core 6 abutting against the front end of the indicator block 9. As the needle core 6 slides back and forth, the indicator block 9 displays a change or remains undisplayed in the transparent area 10. The indicator block 9 can be any of red, yellow, or green, with red being preferred as it is the most conspicuous and conveys meanings such as stop and warning. Spring 7 is located between indicator block 9 and fixed cover 8. A spring placement groove is provided in the middle of the inner side of fixed cover 8, and the tail end of spring 7 is located in this groove. A transparent area 10 is provided on the hollow seat 4. The transparent area 10 of the hollow seat 4 has two main structural forms: one is a rectangular opening on the cylindrical wall of the hollow seat 4 and a transparent window installed in the opening; the other is that the hollow seat 4 is made of transparent material, with an opaque film wrapped around the front cylindrical wall, and the transparent cylindrical wall behind the opaque film forming the transparent area. In its natural state, the front end of needle core 6 protrudes a safe distance beyond the needle tip of puncture needle tube 5, and at this time, the rear end of indicator block 9 is aligned with the front end of the transparent observation window. Therefore, in its natural state, indicator block 9 cannot be observed directly through the transparent observation window. When the head of needle core 6 is compressed, it causes indicator block 9 to compress spring 7, and indicator block 9 moves backward. At this time, indicator block 9 can be observed directly through the transparent observation window.

[0026] like Figure 6As shown, two different sets of warning colors on the indicator block 9 form the first warning area 901 and the second warning area 902 from front to back. The widths of the first warning area 901 and the second warning area 902 are the same or different. The width of the transparent area 10 is the same as the width of the first warning area 901 or the second warning area 902. The first warning area 901 and the second warning area 902 are respectively painted with two different colors. The first warning area 901 is painted red, and the second warning area 902 is painted blue. The length of the second warning area 902 is the same as the safe distance of the needle core 6 protruding from the needle tip of the puncture needle tube 5 in the natural state. The safe distance is set according to the target age group: 2-3mm for infants, 3-4mm for children, and 4-6mm for adults. The length of the first warning area 901 is the same as the length of the needle tip of the puncture needle tube 5, and the length of the transparent observation window is the same as the length of the first warning area 901.

[0027] Example 2 This embodiment provides a method for cricothyroid membrane puncture, using the visual positioning cricothyroid membrane puncture kit provided in Embodiment 1 to perform cricothyroid membrane puncture, including the following steps: S000. Pre-puncture preparation: The patient lies supine with neck extended, exposing the cricothyroid membrane skin. Disinfect the cricothyroid membrane skin with iodine or alcohol. Place the fixing strap 3 of the cannula assembly around the patient's neck. Adjust the position of the base 2 so that the tip of the cannula 1 is aligned with the center of the cricothyroid membrane. The tightness should be such that one finger can be inserted, avoiding compression of the neck blood vessels. Insert the puncture needle 5 of the puncture needle assembly into the cannula 1 of the cannula assembly until the hollow seat 4 of the puncture needle 5 engages with the base 2. At this point, the tip of the puncture needle 5 is flush with the tip of the cannula 1, the tip of the needle core 6 protrudes from the tip of the puncture needle 5, the spring 7 is in a pre-compressed state, and confirm that the transparent observation window shows no color. Figure 7 As shown in Figure ①.

[0028] S100. Needle insertion into the tissue: The needle tip points towards the patient's foot, and the 5-needle shaft of the puncture needle is at a 30-40 degree angle to the patient's coronal plane. Insert the puncture needle tube and cannula into the skin of the cricothyroid membrane region. At this time, the tip of the needle core encounters resistance from the subcutaneous tissue, compressing the spring backward. The indicator block moves backward with the needle core. Observing from the transparent area of ​​the hollow seat, before the needle tip penetrates the skin, it is displayed (blue). When the puncture part of the needle tip enters the skin, the transparent area is partially red. When the entire puncture part of the needle tip enters the skin, the transparent area is entirely red.

[0029] S200, Entering the tracheal lumen: When observed through the transparent area 10 of the hollow seat 4, if the entire area appears red, it indicates that the needle tip of the puncture needle 5 has completely entered the tissue. Figure 7As shown in Figure ③; continue needle insertion. When the tip of the puncture needle 5 and the cannula 1 completely penetrates the cricothyroid membrane and enters the trachea, the resistance disappears, the spring 7 pushes the needle core 6 to reset, and the indicator block 9 moves forward with the needle core 6, disappearing from the transparent area 10 of the hollow seat 4 and entering the opaque area at the front end of the hollow seat 4. Observation from the transparent area 10 of the hollow seat 4 shows no color display, as... Figure 7 As shown in Figure 4, the needle tip of the puncture needle 5 has entered the trachea at this time.

[0030] S300, Reaching a safe depth: Continue to slowly advance the needle while observing the transparent area of ​​the hollow seat 4; when the tip of the needle core 6 contacts the tracheal mucosa, it encounters resistance again, compressing the spring 7 backward. The indicator block 9 moves backward with the needle core 6, and blue appears again from the transparent area 10 of the hollow seat 4, as shown. Figure 7 As shown in Figure 5, the needle tip has reached the target depth, and the needle insertion should be stopped.

[0031] S400. Needle Removal and Verification: Hold the base 2 of the cannula assembly steady with one hand, and slowly remove the puncture needle assembly with the other hand; use a 5ml syringe connected to the rear end of the cannula 1 to aspirate air. If bubbles emerge, confirm that the front end of the cannula 1 is inside the trachea. Finally, use the fixing strap 3 to fix the cannula 1 again to prevent displacement, and then connect the cannula 1 to the ventilation device: for jet ventilation devices, select a jet ventilation device; for non-jet ventilation devices, any of the following can be selected: ventilator, oxygen concentrator, portable respirator, or jet ventilation device.

[0032] In summary, this invention features a needle core 6, a spring 7, an indicator block 9, and a transparent area 10. The needle tip position can be determined in real-time by observing the "appearance-disappearance-reappearance" of the indicator block 9 in the transparent observation window, along with its color, achieving visual positioning and avoiding blind puncture. The puncture success rate is ≥98%, far exceeding the 70%-80% success rate achievable by experienced operators using traditional methods. The cannula 1 of this invention is pre-fixed and inserted along with the puncture needle 5. After puncture, the puncture needle 5 can be directly withdrawn, reducing the operation time to within 1 minute, far less than the 2-3 minutes required by traditional methods. Furthermore, it eliminates the need for secondary catheter insertion, resulting in a complication rate of ≤2%, far less than the 30% complication rate of traditional methods. The puncture structure, indicator block 9, and transparent area of ​​this invention are similar to those of an indwelling needle, providing a consistent observation method, making operation simple and easy to master. Novice training time is reduced to within 1 week, far shorter than the 1-2 months required by traditional methods, making it suitable for emergency scenarios in medical institutions at all levels. Furthermore, this invention features safe and highly compatible materials. All metal components are made of medical-grade metal materials, conforming to the GB 4234-2019 medical-grade standard. The plastic components are made of PP material, which is non-toxic and heat-resistant, and is compatible with existing emergency equipment such as ventilators, oxygen concentrators, simple respirators, and jet ventilation devices. In addition, this invention precisely sets the parameters of the cannula 1 according to different age groups, covering all age groups from infants to adults, achieving precise adaptation for each age group and improving operational safety.

[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A visual positioning type of cricothyroid membrane puncture kit, characterized by, Includes a detachably connected cannula assembly and a puncture needle assembly; The sleeve assembly includes a sleeve, a base, and a fixing strap. The sleeve is disposed on the base, and the fixing strap is detachably connected to the base. The puncture needle assembly includes a hollow base, a puncture needle tube, a needle core, a spring, and an indicator block. The puncture needle tube is located at the front end of the hollow base, and the front opening of the puncture needle tube is a needle tip puncture portion formed by a beveled structure. The spring and the indicator block are located inside the hollow base. The needle core is slidably inserted into the puncture needle tube, and the length of the needle core is greater than the length of the puncture needle tube, with its front end extending out to form the needle tip puncture portion. The rear end of the needle core abuts against the spring or the indicator block to form a linkage state. The surface of the indicator block is provided with at least two sets of different warning colors. A transparent area is provided on the hollow base, and the indicator block, in conjunction with the transparent area, displays the changes in the insertion depth and insertion position of the needle tip puncture portion.

2. The visual positioning cricothyrotomy kit of claim 1, wherein, The two sets of different warning colors on the indicator block form a first warning area and a second warning area from front to back. The width of the first warning area and the second warning area may be the same or different. The width of the transparent area is the same as the width of the first warning area or the second warning area.

3. The visual positioning cricothyrotomy kit of claim 2, wherein, The indicator block is located at the rear end of the needle core or the rear end of the spring. The tail end of the needle core is provided with a pusher. The limiting platform is located inside the hollow seat. The pusher is used to limit the needle core when it is in the initial state. In the initial state, the front end of the needle core protrudes a safe distance outside the puncture part of the puncture needle tube. The front end of the needle core has no sharp edges.

4. The visual positioning cricothyrotomy kit of claim 3, wherein, The first warning area is painted red, and the second warning area is painted blue. The length of the second warning area is the same as the safe distance at which the needle core protrudes from the needle tip puncture site in the initial state.

5. The visual positioning cricothyrotomy kit of claim 4, wherein, The safe distance is set according to the target age group: 2-3mm for infants, 3-4mm for children, and 4-6mm for adults; the length of the first warning zone is the same as the length of the needle tip of the puncture needle, and the length of the transparent observation window is the same as the length of the first warning zone.

6. The visual positioning cricothyrotomy kit of claim 1, wherein, The cannula is made of medical-grade metallic or non-metallic materials, and its inner diameter, outer diameter, and length are set according to the target age group and type: Infant and toddler jet type: inner diameter 1.4mm±0.1mm, outer diameter 1.6mm±0.1mm, length 40mm±2mm; Children's jet type: inner diameter 1.8mm±0.1mm, outer diameter 2.0mm±0.1mm, length 50mm±2mm; Adult jet type: inner diameter 2.2mm±0.1mm, outer diameter 2.4mm±0.1mm, length 65mm±2mm; Non-jet ventilated type for ages 12 and up: inner diameter 3.5mm±0.1mm, outer diameter 4.0mm±0.1mm, length 60mm±2mm.

7. The visual positioning cricothyrotomy kit of claim 1, wherein, The base has connection holes at both ends, and the fixing strap has through strips at both ends. The end of the through strip away from the fixing strap has a hook and loop side, and the through strip also has a loop side. The through strip passes through the connection holes of the base and sticks the hook and loop side to the loop side to connect the fixing strap to the base.

8. The visual positioning cricothyrotomy kit of claim 1, wherein, The puncture needle is made of medical-grade metal material. The outer diameter of the puncture needle is smaller than the inner diameter of the cannula, and the difference between the two is less than or equal to 0.1 mm. The proximal end of the beveled surface of the puncture needle is flush with the front end of the cannula.

9. The visual positioning cricothyrotomy kit of claim 1, wherein, The spring has an elastic modulus of 1.5-2.5 N / mm. The needle core is made of medical-grade metal material. The outer diameter of the needle core is smaller than the inner diameter of the puncture needle tube, and the difference between the two is less than or equal to 0.1 mm. The front end of the needle core is provided with a smooth rounded corner with a radius of 1.3-2 mm.

10. The visual positioning cricothyrotomy kit of claim 1, wherein, The hollow seat is cylindrical, and its transparent area is a rectangular opening on the cylindrical wall of the hollow seat and a transparent window installed in the opening; or the hollow seat is made of transparent material, and the front cylindrical wall of the hollow seat is wrapped with an opaque film, and the transparent cylindrical wall of the hollow seat located behind the opaque film forms a transparent area.

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