CN221998557U

CN221998557U - Dual-purpose airway of nasopharynx oropharynx

Info

Publication number: CN221998557U
Application number: CN202323400862.7U
Authority: CN
Inventors: 朱广球; 王晓霞
Original assignee: Taizhou Enze Medical Center Group
Current assignee: Taizhou Enze Medical Center Group
Priority date: 2023-12-13
Filing date: 2023-12-13
Publication date: 2024-11-15
Anticipated expiration: 2033-12-13

Abstract

The utility model discloses a nasopharyngeal and oropharyngeal dual-purpose airway for painless diagnosis and treatment, which is particularly suitable for painless gastroscopy. The lengths of catheters with different inner diameters are consistent, and the distal ends of the tube walls are porous and have bevels and Murphy holes. It can be inserted through the nose or mouth. Insertion into the supraglottic area or the upper esophagus can be ventilated through the multiple holes. Endoscopic foreign body forceps can clamp the catheter through the Murphy hole to assist in adjusting the position of the catheter. The catheter can be inserted into an oxygen tube or connected to a breathing circuit for autonomous breathing. The utility model has a simple structure, is easy to produce, is simple to operate, has a good ventilation effect when used for painless diagnosis and treatment, and is easy to promote.

Description

Dual-purpose airway of nasopharynx oropharynx

Technical Field

The utility model relates to a medical artificial airway, which can be inserted into a glottic upper region or an upper esophageal segment through nose or mouth to relieve upper respiratory obstruction and perform spontaneous breathing to supply oxygen.

Background

Along with popularization of comfortable medical concepts, gastroscopy often adopts a sedative analgesic painless mode, but transient hypoxia complications often occur, especially hypoxia is more likely to occur for obese patients, and the main reason is upper respiratory tract obstruction.

The artificial airways available for painless gastroscopes are currently of a wide variety, with the most common artificial airways being the nasopharyngeal airways. The nasopharyngeal airway is invented by a great britain anesthesiologist, cap, nineteenth century, and is inserted into the pharyngeal cavity via a unilateral nasal cavity to relieve upper respiratory obstruction. The nasopharyngeal airway is typically made of soft silica gel or plastic material and is a slightly curved cylindrical tube resembling a non-cuff endotracheal tube, but is shorter in length with increasing inner diameter. The catheter has certain softness and can conform to the anatomy of the nasopharyngeal cavity. The angle of the bevel opening at the far end is 45-55 degrees.

The nasopharyngeal airway is used for painless gastroscopy, and has the advantages of convenient insertion and small interference with gastroscopy operation. However, when the patient with obesity uses the nasopharyngeal airway, the incidence rate of the severe hypoxia is not significant to the difference of oxygen inhalation of the nasal catheter, and part of patients still need to support the mandibular intervention. The main reasons for this are as follows: 1. the diameter and length of the nasopharyngeal airway are not matched. The selected nasopharyngeal airway is not long enough to enter the supraglottic region. If a model is changed, the length is increased and the outer diameter is also increased. Insertion difficulties or failure can result due to nasal narrowing and increased bleeding potential from nasal mucosal lesions. 2. The inserted nasopharyngeal airway is deformed by nasal stenosis, resulting in a new obstruction.

If the nasopharyngeal airway is used to fail in insertion or upper respiratory obstruction cannot be effectively solved, it is feasible to insert the upper respiratory obstruction from the mouth by changing the insertion route. The reason is as follows: 1. the mouth cavity is far more spacious than the nasal cavity, and the catheter can not be blocked by pressure. 2. The distance of the incisors from the glottis is typically 2-3 cm shorter than the anterior nares-to-glottis distance. However, oral access suffers from new problems: the distal end of the catheter may be inserted too far into the upper esophageal segment to allow ventilation, especially in emergency situations. The condition can be solved by slightly pulling out the catheter outwards or adjusting the catheter to a proper depth (1-2 cm above the glottis) under the direct view of a gastroscope, but the operation time is increased, and the position of the catheter is adjusted under the emergency hypoxia condition, so that potential safety hazards exist.

In addition, when the pharyngeal cavity is deformed clinically, the adjustment direction of the nasopharyngeal airway is not easy to simply rotate, and the thicker catheter adjustment position is not easy to clamp by the smaller endoscope foreign body forceps.

Disclosure of Invention

(One) solving the technical problems

Aiming at the defects existing in the traditional nasopharyngeal airway, the utility model provides a dual-purpose airway for nasopharynx, oropharynx, and the like, which comprises: the endoscope foreign body forceps can be inserted into the upper part of the glottis or the upper esophageal segment through nose or mouth, can solve the upper respiratory obstruction, and is easy to clamp the catheter to adjust the position.

(II) technical scheme

The utility model is realized by improving the traditional nasopharyngeal airway: ① The lengths of all types of catheters are consistent and different access insertion depth recommended lines are provided; ② The duct wall is porous; ③ The distal end of the catheter has Murphy's holes.

Further, the length of the tube body is 10 cm-20 cm, and the inner diameter is 3.5 mm-8.0 mm.

Further, the catheter wall has an insertion depth scale, and the proximal end has recommended scale marks for the oral and nasal insertion depths.

Further, the far-end pipe orifice of the catheter is in a 45-55-degree inclined plane, a Murphy hole (an additional opening on the side wall of the inclined plane) is formed, and the wall of the catheter in the range of 2/3 of the far-end is in a porous (the shape of the hole is not limited) design.

Further, the tube body material can be medical silica gel, polyvinyl chloride, polyurethane and the like.

Preferably, the length of the catheter is 17.5cm, wherein 1.5cm proximal to the catheter is used to anchor the catheter to the skin using a length of 16cm. This ensures that the upper respiratory obstruction is resolved by reaching the vicinity of the glottis, both nasally and orally.

Preferably, the catheter has a catheter opening inclined plane and Murphy holes at 1.5cm far end, and circular holes are uniformly drilled within 4.5cm near end, the aperture is 2.0-3.5 mm, 4-6 holes are uniformly arranged on the same cross section, and the distance between the holes is kept to be 2.0-3.5 mm, so that the catheter is porous and has certain hardness. This allows ventilation through multiple orifices, regardless of the passage of the catheter into the supraglottic region or upper esophageal segment, and helps reduce airway resistance. The distal catheter port bevel and Murphy's hole design prevents clogging of the catheter by distal touch soft tissue or mucus. In addition, the Murphy hole design can facilitate the smaller endoscopic foreign body forceps to clamp the catheter, and assist in adjusting the position of the catheter when the pharyngeal cavity is deformed.

Preferably, the Inner Diameter (ID) of the catheter is as follows: id5.5mm and id6.0mm. An ID5.5mm catheter is used for women and men with stunted body size, and an ID6.0mm catheter is used for men with tall body size. The small-sized pipeline not only can reduce the mucous membrane injury and stimulation caused by the catheter, but also is beneficial to the discharge of CO ₂ due to the clearance between the catheter and the circular structure of the endoscope during clinical operation.

Preferably, the catheter has an insertion depth recommended scale mark of the oral access way at a position 12.5cm away from the far end, and has an insertion depth recommended scale mark of the nasal access way at a position 14.5cm away from the far end.

Preferably, the proximal end of the catheter is provided with a respiratory circuit standardized interface which can be connected with a respiratory circuit or inserted into an oxygen inhalation tube for supplying oxygen.

(III) beneficial effects

Compared with the traditional nasopharynx air passage, the utility model has the following advantages after improvement on the basis of the traditional nasopharynx air passage:

1. The lengths of different types of the catheters are consistent, so that all the catheters can reach the vicinity of the glottis through the nose and the oral access;

2. The far end of the catheter is provided with an inclined plane, a Murphy hole and a far-end pipe wall hole, certain hardness is reserved, ventilation can be ensured through the pipe wall side hole when the catheter enters the upper section of the esophagus, and air flow resistance is reduced;

3. The far end of the catheter is provided with a Murphy hole, and the endoscope foreign body forceps can easily assist in adjusting the position of the catheter through the Murphy Kong Gazhu catheter;

4. the catheter of the utility model has recommended scale marks for insertion depths of different oral and nasal passages.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.

FIG. 1 is a schematic view of a dual-purpose airway of the present utility model for nasopharynx and oropharynx, wherein: 1. An arc-shaped pipe body; 2. a bevel at the distal end of the catheter; 3. murphy wells; 4. a porous and breathable portion of the distal tube wall; 5. a respiratory circuit standardized interface; 6. inserting a depth scale; 7. the insertion depth of the nasal access is recommended to be marked; 8. recommended graduation marks for insertion depth of the oral access; 9. a proximal end; 10. distal (insertion) end.

Detailed Description

The utility model is further described below with reference to examples and with reference to the accompanying drawings.

The length of the arc-shaped pipe body is 17.5cm, the proximal end is 1.5cm for adhesive tape fixation, and the distal end is 16cm which can be inserted into the upper respiratory tract to ensure that the upper respiratory tract obstruction is relieved near the glottis; the recommended scale mark of the insertion depth of the oral access is 12.5 cm; the recommended depth of insertion of the transnasal access is at 14.5 cm.

As shown in FIG. 1, the 1.5cm distal end of the catheter has a bevel and Murphy's hole design to reduce tissue and mucus plugging. In addition, the catheter had a circular orifice 4.5cm distal. The bevel and porous design ensures that the catheter enters the upper esophageal segment in an emergency and still achieves adequate ventilation.

The application method of the utility model comprises the following steps: when in use, the distal end of the catheter is lubricated to reduce mucous membrane injury and reduce friction between the pipeline and the endoscope rod, thereby facilitating the operation of the endoscope. For blind insertion, the needle was inserted nasally to the recommended graduation line 14.5cm (length from tragus to tip of nose plus 2.5 cm), and transorally to the recommended graduation line 12.5cm (distance from incisor to earlobe). Good ventilation can be achieved through the distal tube wall being porous, such as when inserted into the upper esophageal segment. The distal end of the catheter is preferably positioned about 1 cm-2 cm above the glottis under gastroscopy. When the medicine is inserted through nose, the blood tube shrinkage medicine and the lubricant containing local anesthetic are dripped into nostrils. When the endoscope is inserted through the mouth, the endoscope is inserted from the side hole of the oral ring, when approaching the back wall of the oropharynx, the head is bent backwards, so that the oropharynx is easier to insert when the oral-pharyngeal-laryngeal axis is in a straight line, and the endoscope can also be inserted under direct vision in an auxiliary way.

In a word, the utility model has simple structure, easy production, simple operation, good ventilation effect when being used for painless gastroscopes and easy popularization.

Claims

1. A dual-purpose airway of nasopharynx oropharynx, its characterized in that: comprises a porous catheter with a certain radian, and the near end is provided with recommended graduation marks of the insertion depth of the nose and the mouth.

2. The dual-purpose airway of claim 1, wherein: the length of the catheter is 10 cm-20 cm, and the inner diameter is 3.5 mm-8.0 mm.

3. The dual-purpose airway of claim 1, wherein: the distal end of the catheter is porous in the range of 2/3.

4. The dual-purpose airway of claim 1, wherein: the distal end of the catheter has Murphy's holes.

5. The dual-purpose airway of claim 1, wherein: the near end of the tube wall is provided with recommended scale marks of the insertion depth of the mouth.

6. The dual-purpose airway of claim 1, wherein: the near end of the tube wall is provided with recommended scale marks of the insertion depth of the mouth.