CN211863535U

CN211863535U - Tracheal catheter

Info

Publication number: CN211863535U
Application number: CN201921859229.5U
Authority: CN
Inventors: 田鸣
Original assignee: Individual
Current assignee: Beijing Mingdashu Medical Technology Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-11-06
Anticipated expiration: 2029-10-31

Abstract

The utility model relates to a tracheal catheter, including head end, body and tail end, the head end becomes half bullet head shape, and whole pipe becomes straight line shape, has the gasbag and the instruction gasbag that link up mutually with the gasbag at the head end rear portion, and the tail end has the joint that is connected with breathing machine or anesthesia machine vent line. The structure of the head end is a half bullet head shape formed by cutting off part of the pipe wall from front to back and then to the outside along the centerline plane of the bullet-shaped pipe body, the cut curved surface side formed after cutting off is the ventral side of the head end, and the uncut side is the back side of the head end; the tube wall at the back side of the head end is provided with Murphy's holes, which form a half bullet-shaped and softer head end. The utility model discloses an endotracheal tube adopts neotype head end structure, makes endotracheal tube have most advanced between two parties, soft deformable streamlined structure, overcomes conventional endotracheal tube's shortcoming, makes the most advanced of this pipe easily follow the glottis in the middle of through, and the arc back contact larynx mouth wall, vocal cords and the trachea inner wall of its head end reduce the air flue damage and trachea cannula's complication, have improved trachea cannula's success rate. The tracheal intubation is more suitable for the tracheal intubation of a video laryngoscope and tube core technology, the intubation guided by the bougie and the video soft lens, and the tracheal intubation guided by the laryngeal mask or through the nose.

Description

Tracheal catheter

Technical Field

The utility model belongs to the field of medical equipment, concretely relates to endotracheal tube.

Background

The tracheal intubation refers to a technique of placing a special tracheal catheter into the trachea through the glottis, and the technique can provide optimal conditions for smooth airway, artificial ventilation, respiratory tract suction, prevention of aspiration and the like, and the tracheal catheter is a necessary appliance for realizing the functions. When the conventional laryngoscope is clinically used for tracheal intubation, the condition that glottis is not completely exposed is often encountered, the intubation operation is very difficult, and the patient is easily damaged or even suffers from serious hypoxia and death. Currently, there are 1 clinical strategies to solve the above problems.A video laryngoscope plus a tube core (Stylet) is used to assist endotracheal intubation; 2. the intubation bougie or the video soft lens guides the tracheal intubation; 3. the tracheal catheter is inserted through the intubation laryngeal mask. However, these techniques still suffer from the following clinical problems:

1. adding a tube core for a video laryngoscope: the video laryngoscope obviously improves the exposure of the glottis, and the tracheal catheter can also be aligned to the glottis opening under the assistance of the tube core, and the tip of the conventional catheter is hard and difficult to deform, so that the conventional catheter is difficult to continuously push into the trachea and is easy to cause the damage of the front wall of the trachea. The reason is that the retroflexion degree exists in the trend of the subglottal airway, the retroflexion degree and the retroflexion degree of the pharyngeal portion form an S-shaped channel, and the retroflexion degree under the video laryngoscope is more obvious compared with that when the video laryngoscope is exposed directly. Therefore, even if the trachea catheter enters a sound entrance, the tip of the trachea catheter reaches the front wall of the upper end of the trachea to encounter resistance when the trachea catheter is pushed forwards along the tube core direction by adopting the conventional tracheal catheter tube core adding technology, the hard and non-deformable tip is easy to damage the mucous membrane of the trachea, and the trachea catheter is likely to be brought out unintentionally due to over-shallow insertion when the tube core is withdrawn, thereby causing accidents.

2. The intubation bougie guiding method is easy to guide into the glottis without causing damage only by tightly attaching the tip of the tracheal catheter and the bougie, and the tip of the conventional tracheal catheter is arranged on the side of the tube wall at present; during navigation, the bougie and the tip of the endotracheal tube are easily bifurcated to obstruct the intubation tube and cause injury to the tissues surrounding the glottis. The same problem arises with video soft-or fiberoptic bronchoscopy guide cannulas.

3. Intubation laryngeal masks have been included as an alternative to difficult intubation in china, the united states and the uk as a guideline for difficult airway management. When the tracheal catheter is inserted through the laryngeal mask, the catheter is inserted into the glottis from the median line of the oral cavity, and the tip of the catheter needs to be lifted to cross the rear wall of the larynx after exiting the airway of the laryngeal mask. Whereas a conventional endotracheal tube is left-side open, with a tip on the right sidewall and is relatively hard in texture, easily abrading the glottis and surrounding tissue.

Therefore, how to design the endotracheal tube with more efficient use is a technical problem to be solved at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tracheal catheter aiming at the defects of the prior art. The utility model discloses an endotracheal tube adopts neotype head end structure, makes endotracheal tube have most advanced between two parties, soft deformable streamlined structure, overcomes conventional endotracheal tube's shortcoming, makes the most advanced of this pipe easily follow the glottis in the middle of through, and the arc back contact larynx mouth wall, vocal cords and the trachea inner wall of its head end reduce the air flue damage and trachea cannula's complication, have improved trachea cannula's success rate. The tracheal intubation is more suitable for the tracheal intubation of a video laryngoscope and tube core technology, the intubation guided by the bougie and the video soft lens, and the tracheal intubation guided by the laryngeal mask or through the nose.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a tracheal catheter comprises a head end, a catheter body and a tail end, wherein two sides of the catheter body are respectively communicated with the head end and the tail end, an air bag and an indicating air bag communicated with the air bag are arranged on the side, close to the head end, of the catheter body, a connector capable of being connected with a ventilation pipeline of a breathing machine or an anesthesia machine is arranged at the tail end, the whole structure of the head end is in a half bullet shape, specifically, the half bullet shape is formed by cutting off a part of the catheter wall at the bullet-shaped catheter body along a certain cutting track, the cut curved surface side formed by cutting off is the ventral side of the head end, and the catheter wall on the uncut side is the back side of the;

the cutting track is divided into two sections, wherein the first section is a straight line section parallel to the central line plane of the bullet head type head end pipe body from the head end; the second section is a line segment which is cut along the oblique shape of the pipe wall of the outer side of the turning direction of the cutting plane of the first section, and the joint of the first section and the second section forms an obtuse angle for smooth connection; the tip of the catheter formed by smooth transition of the cut tube wall is positioned at the front end of the central line of the tube body at the head end, and the tube wall at the back side of the head end is provided with a Murphy's hole, so that a half bullet-shaped and softer head end is formed.

The utility model discloses a pipe tip is located the center (cross section picture) of pipe cross section, increases the streamlined of structure, no matter the dorsal part or the ventral side of pipe rotate to which direction its tip all be located the pipe centre, is favorable to opening and getting into the glottis from the centre position, simultaneously because first section tip dorsal part is the design of mellow and smooth cambered surface, has effectively avoided the damage to glottis and trachea mucous membrane when getting into the glottis; the two side edges of the first section of the conduit are on the midline plane of the conduit to form a half-wall conduit, and a certain length and the back half part of the back side wall are provided with a slender Murphy's hole, so that the tip part of the conduit is softer, and the tip part of the conduit is easy to deform when inserted into a sound door with slight resistance, thereby reducing the damage to the air passage and improving the accuracy of the intubation operation.

Preferably, the second section is a line segment which is cut along the longitudinal cutting plane of the first section and turns to the oblique shape of the outer pipe wall, and the included angle formed at the joint of the first section and the second section is 105-135-^°C. The smooth transition obtuse angle is beneficial to the fact that the tip end of the tracheal catheter enters the glottis and then the rear part of the head end of the tracheal catheter continues to smoothly move forwards until the tip end of the tracheal catheter is transited to the tube body and the air bag to pass through.

Preferably, the ratio of the length of the first line segment in the cutting track to the inner diameter of the tracheal catheter tube body is 1.5-2: 1.

Preferably, a Murphy's hole is formed on the midline of the back side of the head end;

preferably, the Murphy's vent is a rectangular blind hole subjected to fillet treatment, and the distance from the rear edge of the Murphy's vent to the front edge of the air bag is less than 8 mm.

Preferably, the plane corresponding to the rear edge of the Murphy's dropper is lower than the plane of the rear edge of the front opening of the ventral tube wall.

Preferably, the length-width ratio of the Murphy's pores is 2-2.5: 1; the ratio of the width of the Murphy's eye to the inner diameter of the tracheal catheter is 1: 1.5-2. The area of the elongated Murphy's pores exceeds 80% of the inner cross-sectional area of the catheter, and the tissues such as epiglottis and the like can be prevented from being embedded, and the hardness of the back side wall of the head end of the catheter is reduced. The special half bullet head structure of the head end and the Murphy's hole in a specific position and shape enable the tip of the catheter to be streamline and have corresponding flexibility, and the tip can deform when meeting resistance.

Preferably, the distance between the front edge and the rear edge of the ventral opening of the head end is less than 20mm, and the distance between the front edge of the balloon and the tip of the catheter is less than 35 mm.

Preferably, a marking line A parallel to the long axis of the tube body is arranged on the midline of the back side of the tube body of the tracheal tube from the head end to the tail end, and is used as an indication for distinguishing the forward (upward) or backward (downward) of the back side of the tube during intubation; two annular marking lines B are arranged at the middle section of the catheter body and used as an indication for identifying the position of the catheter tip when the catheter is inserted into the throat mask.

Has the advantages that:

1. the catheter tip of the patent is designed to be half of the streamline shape of a bullet head and has deformability. When the tube core is installed, the back side of the tube core faces forwards (upwards), the tip end of the tube core reaches the rear edge of the Murphy's eye, the tube core is held to be fixed after the tip end of the tube enters the glottis, the tube core continues to be pushed forwards, the tip end of the tube core is easy to bend backwards after the tip end of the tube core abuts against the front wall of the trachea, the streamline back side tube wall continues to slide into the axial direction of the trachea along the inner wall of the tube core, and at the moment.

2. This patent pipe tip lies in the central line of pipe all the time, and the pipe tip closely laminates into the streamline type with bougie or mirror body when guiding the intubate with the help of bougie or video soft mirror, is convenient for assist endotracheal tube to get into the glottis.

3. The endotracheal tube head end structure of this patent design is most advanced streamlined placed in the middle, and comparatively soft, is favorable to overcoming conventional endotracheal tube's shortcoming, is convenient for through laryngeal mask and intranasal intubate, reaches the purpose that improves the intubate success rate and reduce the air flue damage.

Drawings

Fig. 1 is a schematic view of the overall structure of the endotracheal tube of the present invention;

fig. 2 is a side view of the head end of the endotracheal tube of the present invention;

fig. 3 is a front view of the head end of the endotracheal tube of the present invention;

fig. 4 is a rear view of the head end of the endotracheal tube of the present invention;

fig. 5 is a bottom view of the head end of the endotracheal tube of the present invention;

FIG. 6 is a schematic view of a tip of a prior art endotracheal tube;

wherein, 1-tube body, 2-head end, 3-tail end, 4-marking line A, 5-marking line B, 6-air bag, 7-cutting track, 8-Murphy's hole, and 9-indication air bag.

Detailed Description

The present invention will be further described with reference to the following detailed description.

Fig. 1 shows the endotracheal tube of the present invention, the endotracheal tube includes a head end 2, a tube body 1 and a tail end 3, two sides of the tube body 1 are respectively communicated with the head end 2 and the tail end 3, the tube body 1 is provided with an air bag 6 near the head end 2 (also called as a patient end), the air bag 6 is communicated with an indication air bag 9, the tail end 3 (also called as a machine end) is provided with a connector which can be connected with a ventilation pipeline of a breathing machine or an anaesthesia machine, the whole structure of the head end 2 is a half bullet shape, the head end which is concretely a bullet shape cuts off a part of the tube wall along a certain cutting track to form a half bullet shape, the cutting curved surface side formed after cutting off is the ventral side of the head end 2, and the tube wall of the uncut side is the dorsal side of the;

the cutting track 7 is divided into two sections, wherein the first section is a straight line section which is parallel to the central line plane of the tube body of the bullet head type head end 2 from the head end; the second section is a line segment which is cut along the oblique shape of the pipe wall of the outer side of the turning direction of the cutting plane of the first section, and the joint of the first section and the second section forms an obtuse angle for smooth connection; the tip of the catheter formed by smooth transition of the cut tube wall is positioned at the front end of the central line of the tube body of the head end 2, and the tube wall at the back side of the head end 2 is provided with Murphy's holes 8, so that the head end 2 which is half of a bullet shape and is softer is formed.

The utility model discloses a pipe tip is located the center of pipe cross section (figure 5 bottom view), increases the streamlined of structure, no matter the dorsal part or the ventral side of pipe rotate to which direction its tip all is located the pipe central line, is favorable to opening and getting into the glottis from the positive position, simultaneously because first section tip dorsal part is the design of mellow and smooth cambered surface, has effectively avoided the damage to glottis and trachea mucous membrane when getting into the glottis; the two side edges of the first section of the conduit are on the midline plane of the conduit to form a half-wall conduit, and a certain length and the back half part of the back side wall are provided with a slender Murphy's hole 8, so that the tip part of the conduit is softer, and the tip part of the conduit is easy to deform when inserted into a sound door with slight resistance, thereby reducing the damage to the air passage and improving the accuracy of the intubation operation.

Preferably, the second section is a line segment which is obliquely cut along the longitudinal cutting plane of the first section and turns to the outer tube wall, and the included angle formed at the joint of the first section and the second section is 105 ℃ and 135 ℃. The obtuse angle of the smooth transition is beneficial to the fact that the tip end of the tracheal catheter enters the glottis and then the rear part of the head end 2 of the tracheal catheter continues to smoothly move forwards until the tip end is transited to the tube body and the air bag to pass through.

Preferably, the ratio of the length of the first line segment in the cutting track 7 to the inner diameter of the body of the endotracheal tube is 1.5-2: 1.

Preferably, a Murphy's eye 8 is arranged on the midline of the back side of the head end 2;

preferably, the Murphy's vent 8 is a rectangular blind hole processed by round angle, and the distance between the rear edge of the Murphy's vent 8 and the front edge of the air bag is less than 8 mm.

Preferably, the rear edge of the Murphy's eye 8 is lower than the rear edge plane of the front end opening of the ventral tube wall.

Preferably, the length-width ratio of the Murphy's pores 8 is 2-2.5: 1; the ratio of the width of the Murphy's eye 8 to the inner diameter of the tracheal tube is 1: 1.5-2. The area of the elongated Murphy's hole 8 exceeds 80% of the inner cross-sectional area of the catheter, and the insertion of tissues such as epiglottis can be prevented, and the hardness of the back side wall of the catheter head end 2 is reduced. The special half bullet structure of the head end 2 and the specific position and shape of the Murphy's hole 8 enable the tip of the catheter to be streamline and have corresponding flexibility, and the tip can deform when meeting resistance.

Preferably, the distance between the front edge and the rear edge of the ventral opening of the head end 2 is less than 20mm, and the distance between the front edge of the balloon and the tip of the catheter is less than 35 mm.

Preferably, a marking line A4 parallel to the long axis of the tube body is arranged on the dorsal midline of the tracheal tube body from the head end 2 to the tail end 3 and is used as an indication for distinguishing the forward (upward) or backward (downward) of the back of the tube body when the tube is inserted; two annular marking lines B5 are arranged at the middle section of the catheter body and used as indications for identifying the position of the catheter tip when the catheter is inserted into the throat mask.

It should be noted that the present invention has been made through long-term clinical trials and continued improvements, and it is the definition of the direction, angle, arc length, and width of the opening at the tip of the catheter in the examples that make the endotracheal tube easier to pass through the larynx and glottis and to be tip-deformable to accommodate the S-shaped anatomical structures of the upper and lower airways.

The tracheal catheter provided by the utility model improves the success rate of delivering the catheter into the trachea under a video laryngoscope by means of the tube core, and reduces the pressure and damage of the tracheal catheter to the front wall of the trachea in the trachea; the success rate of the bougie guide intubation and the success rate of the video soft lens or the fiberbronchoscope guide intubation are improved, the operation difficulty is reduced, and the complications are reduced. The tracheal catheter and the transnasal intubation inserted through the laryngeal mask are improved, the damage is reduced, and the success rate is improved.

The tracheal catheter with cuff in the prior art is provided with a chamfer which is formed by cutting with a cutter in the standard YY 0337.1-2002 tracheal catheter of the Chinese people's republic of China and medical industry, and the structures of the chamfer and the Murphy's hole are shown in figure 6, which is obviously different from the tracheal catheter of the present application.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An endotracheal tube, characterized by: the tracheal catheter comprises a head end, a catheter body and a tail end, wherein two sides of the catheter body are respectively communicated with the head end and the tail end, the side, close to the head end, of the catheter body is provided with an air bag and an indicating air bag communicated with the air bag, the tail end is provided with a connector capable of being connected with a ventilation pipeline of a breathing machine or an anesthesia machine, the whole structure of the head end is in a half bullet shape, specifically, the half bullet shape is formed by cutting off a part of the catheter wall at the bullet-shaped catheter body along a certain cutting track, the cut curved surface side formed by cutting off is the ventral side of the head end, and the catheter wall at the uncut side is;

2. An endotracheal tube according to claim 1, characterized in that: the ratio of the length of the first segment of line segment in the cutting track to the inner diameter of the tracheal catheter body is 1.5-2: 1.

3. An endotracheal tube according to claim 1, characterized in that: the included angle between the first straight line segment and the second oblique line segment in the cutting track is 105-135-^°C。

4. An endotracheal tube according to claim 1, characterized in that: and a Murphy's hole is formed in the midline of the back side of the head end.

5. An endotracheal tube according to any one of claims 2 to 4, characterized in that: the Murphy's hole is a rectangular blind hole processed by round corners.

6. An endotracheal tube according to claim 5, characterized in that: the length-width ratio of the Murphy's pores is 2-2.5: 1; the ratio of the width of the Murphy's eye to the inner diameter of the tracheal catheter is 1: 1.5-2.

7. An endotracheal tube according to claim 6, characterized in that: the distance between the rear edge of the Murphy's hole and the front edge of the air bag is less than 8 mm.

8. An endotracheal tube according to claim 1, characterized in that: the distance between the front edge and the rear edge of the head end ventral opening is less than 20 mm.

9. An endotracheal tube according to claim 1, characterized in that: the leading edge of the balloon is less than 35mm from the tip of the catheter.

10. An endotracheal tube according to claim 1, characterized in that: a marking line A parallel to the long axis of the tracheal catheter body is arranged from the head end to the tail end on the midline of the back side of the tracheal catheter body; the middle section of the catheter body is provided with an annular marking line B.