CN101530315A - Transesophageal examination laryngeal mask - Google Patents

Abstract

The invention provides a laryngeal mask for transesophageal inspection with simple structure and convenient operation, which belongs to the field of medical equipment. The transesophageal examination laryngeal mask includes a ventilation tube, a ventilation mask and a ventilation mask inflation tube, a ventilation port, a one-way valve, an indicating air bag, an esophageal intervention tube, an esophageal intervention tube inflation tube, an inflation tube fixing ring, and at least one secretion Suction tube and its retaining ring. The esophageal intervention tube is connected to the lower end of the ventilation hood but not connected, and is used in conjunction with the inflatable tube of the esophageal intervention tube; the upper end of the secretion suction tube is connected to a negative pressure source, and its lower end is a free end, and the secretion suction tube is attached through a fixing ring in the vent pipe. The invention solves the problem of excessive oropharyngeal secretions in the process of using a common laryngeal mask; and can allow ultrasonic probes, gastroscopes, gastric tubes and other instruments to pass through, and can realize intraoperative transesophageal ultrasound, painless gastroscopy, and painless gastric tube drainage and other technologies.

Description

Transesophageal examination laryngeal mask

technical field

The invention relates to a laryngeal mask, in particular to a laryngeal mask for transesophageal examination, which belongs to the field of medical devices.

Background technique

Laryngeal Mask Airway (LMA) is an artificial airway developed by British doctor Brain in 1981 based on the anatomy of the adult throat structure. Its emergence is to solve the damage to the skin and mucous membrane caused by oral endotracheal intubation during anesthesia. Existing common laryngeal masks are generally composed of three parts: a ventilation tube, a ventilation mask and an inflation tube of the ventilation mask. The potential opening at the upper end of the esophagus is tightly covered, and anesthetic gas is passed through the ventilation tube for inhalational anesthesia. If the above-mentioned laryngeal mask is called the first-generation laryngeal mask, then on the basis of the first-generation laryngeal mask, many people at home and abroad have modified it, and now it has developed to the third-generation laryngeal mask.

The second generation is the intubating laryngeal mask (LMA-Fastrach, Intubating LMA, ILMA); the third generation is the double-tube laryngeal mask (ProSeal-LMA). In recent years, the research on the laryngeal mask has been increasing, and some new improvements have been made. In 2006, Daniel J. Cook proposed two structures of the laryngeal mask [US 2008/0078398 A1 Methods of forming alaryngeal mask Apr.3, 2008 US]. In the same year, another patent proposed a slidable panel at the far end of the laryngeal mask, which can tightly cover the mouth and nose [US 2008/0078402 A1 Superglottic airway device and method of use Apr.3, 2008]. For the weakness that the laryngeal mask is easy to dislocate, various methods have also been proposed. For example, at least one support is placed in the laryngeal mask and connected to the inflatable ring, and when inflated, the laryngeal mask is erected to enter the larynx [US2007/0246050 A1 Laryngeal mask and method for making the same Oct. 25, 2007]. Another example is that the laryngeal mask contains an annular sealing port and an outwardly extending annular neckline, both of which can be inflated through different channels [US 2008/0092903 A1 Laryngeal mask assemblies Apr.24, 2008]. But these improved laryngeal masks still have many deficiencies, such as poor airtightness and high aspiration rate; the front part of the ventilation bag occupies the pharynx, which causes great inconvenience to the use of transesophageal ultrasonic gastric tube drainage; During laryngeal mask anesthesia, secretions in the patient's oropharynx will increase and accumulate in the oral cavity and throat, leading to adverse consequences such as spasm and choking.

In order to make up for the shortcomings of the above-mentioned existing common laryngeal mask, it is possible to use the laryngeal mask in combination with transesophageal ultrasound, gastroscopy, gastric tube, etc., and at the same time to timely absorb the excessive secretions produced by the stimulation of the laryngeal mask during the operation. For this reason, if can design a kind of novel transesophageal examination laryngeal mask, said problem can all be solved, and this is where the task of the present invention is.

Contents of the invention

The object of the present invention is to overcome the shortcomings of the existing common laryngeal mask, and to provide a transesophageal inspection laryngeal mask for inhalation general anesthesia in clinic. The laryngeal mask not only has good airtightness, but also solves the problem of excessive oropharyngeal secretions during the use of ordinary laryngeal masks; it also has the characteristics of allowing ultrasound probes, gastroscopes, gastric tubes, etc. The combined use of esophageal ultrasound, gastric tube, and gastroscope brings great convenience to the use of transesophageal ultrasound gastric tube drainage.

In order to realize the purpose of the present invention, the present invention adopts the technical scheme that the following measures constitute to realize.

The laryngeal mask for transesophageal examination of the present invention includes a ventilation tube, a ventilation mask and a ventilation mask inflation tube, a ventilation port, a one-way valve, and an indicating air bag. ring, secretion suction tube, suction tube fixing ring; the esophageal intervention tube is connected to the lower end of the ventilation mask but not connected; Fixed on the side wall of the ventilation hood, the secretion suction tube is attached to the back of the ventilation tube through the suction tube fixing ring, the upper end is connected to the negative pressure source, and the lower end is a free end, so that the secretion of the oropharynx can be sucked by negative pressure during use .

In the above technical solution, the esophageal intervention tube is configured as a hollow cylindrical tube with inner and outer walls.

In the above technical solution, the outer wall of the hollow cylindrical tube of the esophageal intervention tube is set in a D shape, and the inner wall is set in an hourglass shape.

In the above technical solution, at least one secretion suction tube is provided.

In the above technical solution, the wall of the opening at the lower end of the secretion suction tube is wedge-shaped, which is beneficial for absorbing foreign bodies in the oropharynx.

In the above technical solution, there are at least two fixing rings for the suction pipe, and their shapes are C-shaped.

In the above technical solution, there are at least two fixing rings for the inflation tube, which are C-shaped.

Compared with the prior art, the present invention has the following advantages and beneficial technical effects:

1. The present invention checks the setting of the esophageal intervention tube in the laryngeal mask through the esophagus:

(1) It can allow the passage of ultrasound probes, gastroscopes, gastric tubes, etc., making it possible to use the laryngeal mask in combination with transesophageal ultrasound and gastric tubes.

(2) When the probe or gastroscope is inserted, the laryngeal mask can be more effectively prevented from slipping, and the esophageal intervention tube can be extended into the esophagus, so that the laryngeal mask can be better fixed.

(3) The inner wall of the esophageal interventional tube is designed in an hourglass shape, which can reduce friction, facilitate the rotation and movement of the probe or gastroscope, and help stabilize the laryngeal mask; the esophageal interventional tube can not only allow the probe to pass through smoothly, but not Too large to cause excessive compression of the esophageal mucosa; in addition, the outer wall of the esophageal intervention tube is directly attached to the posterior wall of the trachea, which can reduce the compression of the trachea.

(4) When no transesophageal examination is required, the esophageal interventional tube is not inflated. At this time, it is flat and attached to the lower end of the ventilation tube without occupying space. When a transesophageal examination is required, it is inflated to fully ensure its airtightness.

2. The present invention checks the setting of the secretion aspiration tube in the laryngeal mask through the esophagus:

(1) Solve the problem of excessive oropharyngeal secretions during the use of ordinary laryngeal masks.

(2) Use the C-shaped suction tube fixing ring to restrict the secretion suction tube near the ventilation tube, which can not only reduce friction, but also adjust the position well.

Description of drawings

The overall profile front structure schematic diagram of the preferred embodiment of Fig. 1 of the present invention;

Fig. 2 is a schematic diagram of the rear structure of Fig. 1;

Fig. 3 is a schematic diagram of the side structure of Fig. 1;

Fig. 4 is a schematic diagram of the inflation state of the ventilation mask and the esophageal intervention tube of the present invention.

Code in the picture: 1 ventilation tube, 2 ventilation cover, 3 ventilation cover inflation tube, 4 esophageal intervention tube, 5 esophageal intervention tube inflation tube, 6 secretion suction tube, 7 suction tube fixing ring, 8 ventilation port, 9 one-way valve , 10 indicating the air bag, 11 fixing ring of the inflatable tube.

Detailed ways

The application process and operation steps of the present invention will be further described in detail with reference to the accompanying drawings and embodiments, but it does not mean any limitation to the content of the present invention.

In Fig. 1, the ventilation pipe 1 is connected with the ventilation opening 8, that is, the ventilation opening is the opening of the ventilation pipe to the trachea, the ventilation cover 2 is connected with the ventilation cover inflation tube 3, and the ventilation cover surrounds and connects the ventilation opening but is not connected with it. The esophagus interventional tube 4 is connected with the esophageal interventional tube inflatable tube 5, the upper end of the esophageal interventional tube is located at the lower end of the ventilation hood 2, and is connected to the lower end of the ventilation hood but not communicated with it, and the lower part of the esophageal interventional tube inflatable tube is fixed by the inflatable tube The ring 11 is bound to the front side wall of the ventilation hood, the middle and upper part of the inflatable tube of the esophagus interventional tube is parallel to the inflatable tube 3 of the ventilation hood, but the two tubes are not connected, and the upper openings of the two inflatable tubes are connected to the one-way valve 9 through the indicator balloon 10; The material suction pipe 6 is bound on the rear side wall of the ventilation pipe 1 by the suction pipe fixing ring 7, and is only adjacent to the ventilation pipe but not communicated.

In FIG. 2 , the structure and connection relationship are the same as those in FIG. 1 .

In FIG. 3 , the structure and connection relationship are the same as those in FIG. 1 .

In Fig. 4, the ventilation cover 2 is attached to the esophageal intervention tube 4 but not communicated, the gas tube 5 of the esophageal intervention tube is bound to the side wall of the ventilation cover 2 through the gas tube fixing ring 11 but is not connected to the ventilation cover 2, The hollow cylindrical tube of the esophagus intervention tube 4 can be inflated through the inflation tube 5 of the esophagus intervention tube, as shown in FIG.

Example

The use process and operation steps of the transesophageal examination laryngeal mask of the present invention:

In this embodiment, the secretion aspiration tubes 6 of the laryngeal mask for transesophageal inspection are set to the optimum value of 2, and the two secretion aspiration tubes are attached to the back of both sides of the ventilation tube 1 through the C-shaped suction tube fixing ring 7. At the same time, Since the C-shaped suction tube fixing ring can allow the secretion suction tube to slide up and down, the scope of foreign matter suction is increased; the external opening at the upper end of the secretion suction tube is connected to a negative pressure source, and the wedge-shaped opening in the lower end of the tube wall can effectively suck out the surrounding mouth Excessive secretions produced by the pharynx.

When in use, first discharge the air in the laryngeal mask, apply water-soluble lubricant, insert the laryngeal mask to the lower pharyngeal cavity, press the throat tube, and then inflate the ventilator 2 through the ventilator tube 3 to expand it. Full inflation is indicated when the indicator balloon 10 is inflated, covering the trachea and obscuring a potential opening at the upper end of the esophagus. Fix the position of the laryngeal mask on the face, so that the anesthetic gas enters the trachea through the ventilation tube 1 and the ventilation port 8, and is absorbed by the human body to achieve anesthesia effect. Because the esophagus is covered by the ventilation mask 2, anesthesia gas cannot enter the stomach from the esophagus to cause gastric distension and vomiting.

When a transesophageal examination is required, the esophageal interventional tube 4 with inner and outer walls is inflated, that is, the hollow cylindrical tube of the esophageal interventional tube 4 is inflated through the esophageal interventional tube inflation tube 5, because the outer wall of the esophageal interventional tube is D-shaped , its straight wall is close to the cricoid cartilage of the trachea, which can increase the attachment area and reduce the pressure on the trachea. Or the rotation and up and down movement of the gastric tube while avoiding the passage of anesthetic gas. When the indicator balloon is inflated, it means that it is fully inflated, and the esophageal interventional tube expands backward and downward to stretch the esophagus. The stomach tube, etc. are inserted into the esophagus through the hourglass-shaped lumen, and ultrasound detection or gastroscopy can be performed at this time.

When transesophageal examination is not required during the operation, it is not necessary to inflate the esophageal access tube. The uninflated esophageal interventional tube has a small volume and is closely attached to the lower end of the ventilator to complete the shielding of the esophagus together with the ventilator.

Claims (7)

1. A laryngeal mask for transesophageal examination, comprising a ventilation tube (1), a ventilation mask (2) and a ventilation mask inflation tube (3), a ventilation port (8), a one-way valve (9), an indicating air bag (10), It is characterized in that it also includes an esophageal intervention tube (4), an esophageal intervention tube inflation tube (5), an inflation tube fixing ring (11), a secretion suction tube (6), and a suction tube fixing ring (7); the esophageal intervention tube The upper end is connected to the lower end of the ventilation cover (2) but not connected; the lower end of the esophageal interventional tube gas tube (5) is connected to the esophageal interventional tube through a connector, and is bound to the side wall of the ventilation cover by the gas tube fixing ring (11). The secretion suction tube (6) is attached to the back of the ventilation tube (1) side through the suction tube fixing ring (7), its upper end is connected with a negative pressure source, and its lower end is a free end. 2. The laryngeal mask for transesophageal examination according to claim 1, characterized in that the esophageal intervention tube (4) is set as a hollow cylindrical tube with inner and outer walls. 3. The laryngeal mask for transesophageal examination according to claim 1 or 2, characterized in that the outer wall of the hollow cylindrical tube of the esophageal intervention tube (4) is set in a D shape, and the inner wall is set in an hourglass shape. 4. The laryngeal mask for transesophageal examination according to claim 1, characterized in that at least one secretion suction tube (6) is provided. 5. The laryngeal mask for transesophageal examination according to claim 1 or 4, characterized in that the wall of the opening at the lower end of the secretion suction tube (6) is wedge-shaped, which is conducive to absorbing foreign bodies in the oropharynx. 6. The laryngeal mask for transesophageal examination according to claim 1, characterized in that there are at least two suction tube fixing rings (7); and its shape is C-shaped. 7. The laryngeal mask for transesophageal examination according to claim 1, characterized in that there are at least two inflatable tube fixing rings (11) in a C-shape.

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