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CN-121971764-A - Catheter for tracheal cannula and operation method thereof

CN121971764ACN 121971764 ACN121971764 ACN 121971764ACN-121971764-A

Abstract

The invention relates to a catheter for trachea cannula, which comprises a catheter main body, wherein the distal end of the catheter main body is provided with a right inclined plane opening, part of the wall of the edge of a distal end pipe orifice at the opening is outwards extended to form a tongue-shaped tip, the tongue-shaped tip is opposite to the side of a proximal end pipe orifice at the right inclined plane opening of the catheter main body and is integrally formed with the catheter main body, and the side wall of the side of the distal end tongue-shaped tip of the catheter main body is provided with a water drop-shaped ink phenanthrene hole. The tongue-shaped tip and the catheter main body are designed into an integrally formed structure and the improved drip-shaped Murphy hole is designed, so that the catheter is more suitable for a scene of insertion through a midline, such as insertion under a video laryngoscope and insertion through a laryngeal mask, and the like, and meanwhile, the airway damage caused by insertion is reduced, the catheter has higher safety, reliability and operation efficiency in the aspects of protecting airways and difficult airway management, is suitable for various different types of tracheal insertion of adults and children, and is simple in manufacturing process and convenient for mass production and manufacture.

Inventors

  • TIAN MING

Assignees

  • 北京鸣达舒医疗科技有限公司

Dates

Publication Date
20260505
Application Date
20260213

Claims (10)

  1. 1. A catheter for tracheal intubation comprises a catheter main body and is characterized in that the distal end of the catheter main body is provided with a positive inclined surface opening, and part of the wall of the edge of a distal pipe orifice at the opening extends outwards to form a tongue-shaped tip.
  2. 2. The endotracheal tube according to claim 1, wherein the tongue-shaped tip is provided opposite to a proximal nozzle side of the opening of the straight inclined surface of the tube body, and is integrally formed with the tube body.
  3. 3. The endotracheal tube as claimed in claim 2, wherein the thickness of the tongue-shaped tip is smaller than or equal to the wall thickness of the tube body.
  4. 4. A catheter for endotracheal intubation according to any of claims 1 to 3, wherein the angle between the tongue-shaped tip and the inclined surface opening of the catheter body is 135 DEG to 150 deg.
  5. 5. A catheter for tracheal intubation according to any one of claims 1-3, wherein the side wall of the tongue-shaped tip at the distal end of the catheter body is provided with a Murphy hole, the Murphy hole is in a shape of a water drop, the lower edge of the Murphy hole is 1-2 mm lower than the lower edge of the opening of the catheter at the opposite side of the tongue-shaped tip on the same cross section or on the opposite side of the tongue-shaped tip, the hole area of the Murphy hole is more than or equal to 4/5 of the cross section area of the cavity of the catheter body, and the included angle radian of the Murphy hole is 30-45 degrees.
  6. 6. A catheter for endotracheal intubation according to any of claims 1 to 3, wherein a median marking line is provided on the back of the catheter body.
  7. 7. The endotracheal intubation tube according to any one of claims 1 to 3, wherein the thickness of the tongue-shaped tip is 0.2 to 1.0 times the thickness of the tube body, the front end is circular arc-shaped, the length of the tongue-shaped tip is 4 to 10mm, and the hardness is Shore A2545.
  8. 8. A catheter for endotracheal intubation according to any one of claims 1 to 3, wherein the catheter body is a straight catheter or a curved catheter.
  9. 9. The endotracheal intubation catheter according to claim 8, wherein the straight tube is a steel wire reinforced tube, the tube is straight and can be bent at any angle by guiding the steel wire structure, and the bent tube is a C-shaped bent endotracheal tube or a tube core guiding type bent endotracheal tube through a laryngoscope.
  10. 10. A method of operating a catheter for an endotracheal tube according to claim 1, wherein the catheter is fed through the mouth with its positive bevel opening facing downward, and is pushed inward into the trachea while being screwed outward until 180 degrees outward after insertion of the tongue-shaped tip through the inferior epiglottis, and the catheter is secured with its back median marking line visible directly above.

Description

Catheter for tracheal cannula and operation method thereof Technical Field The invention belongs to the technical field of medical appliances, and particularly relates to a catheter for a tracheal cannula and an operation method thereof. Background In clinical anesthesia and intensive care practice, the tracheal cannula is used as a core operation for maintaining the airway of a patient and performing mechanical ventilation, and the success rate is directly related to the safety of the patient. When a conventional laryngoscope is used for intubation, the glottis is not fully exposed, so that the intubation difficulty is often caused, the operation time is prolonged, and the airway mucous membrane is possibly damaged, and serious hypoxia and even life threatening are possibly caused. In order to optimize the glottic visualization effect, indirect laryngoscope devices such as video laryngoscopes and the like are gradually popularized, and the glottic exposure degree is remarkably improved. However, the application of the video laryngoscope changes the natural anatomical path from the oropharynx to the glottis, so that the forward bending angle of the video laryngoscope is obviously increased, the bending degree of the front end of the traditional tracheal catheter is limited, the video laryngoscope is difficult to smoothly enter the glottis according to the path, and the dilemma that the glottis is visible but the catheter cannot pass is frequently caused, so that the intubation difficulty and the complications risk are aggravated. Current clinics often employ a die or cannula bougie to assist in guiding the cannula procedure. However, the tip of the conventional tracheal catheter is designed into a lateral opening structure, and in the guiding process, the tip of the catheter of the median access is positioned at the lateral side, and in addition, the bourtie and the tip of the catheter are easy to form a bifurcation effect, so that the tissue around the glottis is damaged, and meanwhile, the tip of the catheter which is harder after entering the trachea is difficult to deform, so that the mucosa of the anterior wall of the trachea below the glottis is easy to damage. To solve this problem, the previously developed bougie-type tracheal catheter combines the technology of hockey stick-shaped pre-shaping and 180-degree outward rotation by integrating a bougie structure at the front end of the catheter, so that the efficiency of intubation is improved, but the bougie part is physically connected with the catheter body after being independently shaped by adopting a soft material, and the potential risk of separation of a connecting interface exists. Once the bougie falls off, it may stagnate in the trachea or bronchi to form a foreign body, inducing airway obstruction, atelectasis, secondary infection, or even asphyxia. In addition, the cylindrical bougie is easy to generate friction damage with the tracheal mucosa when the tube is rotated, and particularly after 180-degree rotation is completed, the tip of the cylindrical bougie continuously presses a membranous region of the midline of the rear wall of the trachea, which is the weakest part of the tracheal structure, and local tissue necrosis or perforation can be caused by long-term compression. Meanwhile, the bougie protrudes to the inside of the lumen, and occupies an effective ventilation section, so that the bougie is particularly prominent in a small-caliber catheter, the airflow resistance is obviously increased, the ventilation efficiency is reduced, and the respiratory support effect is affected. The defects of the prior art are highlighted, and a novel catheter for the tracheal cannula is needed, the structure of the novel catheter is required to realize the overall safety and reliability, the biocompatibility is excellent, and the ventilation performance reduction caused by design defects is avoided, so that the hidden danger of component separation is thoroughly eliminated, the mechanical stimulation to airway mucosa is lightened, the lumen smoothness is ensured, and the safety and comfort experience of a patient are comprehensively ensured while the success rate of the cannula is improved. Aiming at the technical problems of falling risk, increased ventilation resistance, mechanical damage to airway mucosa and the like existing in clinical application of the traditional bougie type tracheal catheter due to the adoption of a split type butt joint structure of the tip additional component and the catheter body, the invention provides the tracheal catheter with integrated structure, high safety, convenient operation and wider applicability. In order to solve the technical problems, the invention adopts the following technical scheme: A catheter for trachea cannula comprises a catheter main body, wherein the far end of the catheter main body is provided with a positive inclined surface opening, part of the wall of the edge of a distal pipe orifice at