CN201150702Y - Tracheal catheter - Google Patents

Abstract

The utility model relates to an apparatus and a device for introducing medicine into the upper airway of a human body. An endotracheal tube comprises a hose (1), a proximal connector (16), and a distal end of the hose (1), wherein the distal end comprises: an inflatable cuff (2); a longitudinal airway (10); a plurality of injection holes (7, 9) opening on the outer surface of the hose (1); a longitudinal channel (11) and radial annular channels (12, 13) for providing medicine. An indicator ring is located at the position of the injection hole (7) and around the diameter of the hose (1), and the color of the indicator ring is different from the color of the hose (1). When the endotracheal tube is in the working position, the indicator ring is visible on the side of the throat, in which case the indicator ring is located at the upper edge (15) of the throat (14). It is a preferred choice when the total fluid resistance of the radial annular channel (12) and the injection hole (7) thereon is the same as the total fluid resistance of another radial annular channel (13) and the injection hole (9) thereon.

Description

endotracheal tube

technical field

The utility model relates to the field of medicine, in particular to an instrument and a device for introducing medicine into the upper airway of a human body.

Background technique

Generally, an endotracheal tube consists of a set of cuffs, a catheter for inflation of the cuff, a connector to connect the endotracheal tube to an artificial lung ventilator, a cylinder for monitoring and optimizing the pressure inside the cuff (patent RU2150300, June 10, 2000 published). In the endotracheal tube wall adjacent to the cuff there are 2 radial ring channels and holes connecting the channels to the outside of the endotracheal tube. The endotracheal tube itself is provided with a catheter for providing local anesthetic, and one end of the catheter is respectively connected to each radial ring channel, and local anesthetic is provided to the area where the cuff contacts the laryngeal mucosa and the lower part of the airway through one of the radial ring channels , delivering local anesthetic to the throat area through the second radial ring channel. When the endotracheal tube is inserted into the upper airway, it is necessary to control the depth of the inserted tube and adjust its proper position in the relevant respiratory organs.

Utility model content

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a tracheal catheter, which improves the accuracy and uniformity of drug injection into the throat by improving the structure of the tracheal catheter with an inflatable cuff , and quickly control the positioning accuracy of the endotracheal tube in the working position, creating conditions for the uniform injection of drugs into the larynx.

The utility model solves the problems of the technologies described above through the following technical solutions:

An endotracheal tube comprising a flexible tube, a connector located at the proximal end of the tube and connected to an artificial lung ventilator, a distal end of the tube comprising: a an inflatable cuff in place; a longitudinal airway in the wall of the tube for connecting the lumen of the inflatable cuff to the cuff inflation means; a longitudinal channel in the wall of the tube for delivering the drug; One or more radial annular passages for supplying drug in the wall of the hose are connected to the longitudinal passage for supplying drug and a series of injection holes located in the outer wall of the one or more radial annular passages. The novel feature is that the distal end of the hose also includes an indicator ring on the outside of the distal end of the hose at or near the injection hole, around the diameter of the hose, the indicator ring being a different color than the outside of the hose, at least as The color of the distal end of the hose is different. The indicator ring is visible on the side of the larynx when the endotracheal tube is in the working position, in this case at the upper edge of the larynx.

The longitudinal channel for supplying the medicament is connected at one end to the means for supplying the medicament and at the other end is connected to one or more radial ring channels.

It is preferred when the longitudinal air channel and the longitudinal channel for supplying the medicament are arranged in the wall of the hose symmetrically about the diameter.

According to the purpose of treatment, there can be two or more radial ring channels. In this case, the total fluid resistance of one radial ring channel and its upper injection hole should be the same as that of the other radial ring channel and its upper injection hole. The total fluid resistance is the same. Or, when there are more than two radial ring channels, it should be the same as the total fluid resistance of each radial ring channel and its upper injection hole.

The outer wall of the radial ring passage for providing the medicament may be formed as a protruding collar of the hose. Best choice when the indicator ring is made along the collar.

The injection hole may be positioned perpendicular to the axis of the distal end of the hose, and/or at an acute angle to the axis of the distal end of the hose, close to the inflatable cuff.

There can be 3 or more injection holes on the outer wall of the radial ring channel, and it is a better choice when they are equidistantly distributed on the diameter of the radial ring channel.

The positive progressive effect of the utility model is that the accuracy and uniformity of drug injection into the throat are improved.

Description of drawings

The explanatory drawings of the utility model provided include:

Figure 1 is a general view of a preferred embodiment of an endotracheal tube; and

Fig. 2 is an enlarged partial cross-sectional view of A in Fig. 1, showing the distal end and its arrangement in the working position.

Detailed ways

The utility model is illustrated by preferred embodiments.

The endotracheal tube (see Figures 1 and 2) consists of a flexible tube 1 with an inner diameter of 8mm and a connector 16 at its proximal end, which is connected to an artificial lung ventilator (not shown). Its distal end comprises: an inflatable cuff 2 with a diameter of 28mm (i.e. the usual diameter of the trachea) after inflation; a longitudinal airway 10 with an inner diameter of 0.5-1.5mm, connected to a pneumatic cylinder 4 through a catheter 3, and Inflating the inflatable cuff 2; an inner diameter of 1-2 mm, a longitudinal channel 11 for supplying medicine, connected to a device (not shown) for supplying liquid and/or aerosol local anesthetic through a catheter 5; The first radial ring channel 12 with an inner diameter of 0.5-1.5 mm is connected to the channel 11 and has an external protruding wall, namely a collar 6, which is used as an indicator ring and is smoothly connected with the outer portion of the distal end of the hose 1, and is provided with There are 3 or more injection holes 7 with a diameter of 0.1-0.4 mm, which are distributed equidistantly around the diameter of the collar 6; a second radial ring channel 13 with an inner diameter of 0.5-1.5 mm, connected to the channel 11 There is also an external protruding wall, that is, the second collar 8, which is smoothly connected to the outer portion of the distal end of the hose 1, and is provided with 3 or more injection holes 9 with a diameter of 0.1-0.4mm, and these holes surround the sleeve The diameters of the rings 8 are equally spaced.

When the inner diameters of the ring passages 12 and 13 are the same, and the number and diameter of the injection holes 7 and 9 are identical, it is a better choice. In this case, the total fluid resistance of the ring passage 12 and the injection holes 7 and the ring passage 13 and the total fluid resistance of the injection hole 9 are the same, which ensures that the drug is injected smoothly from the injection holes 7 and 9 at the same time. Preferably, the injection hole 7 is set to be perpendicular to the axis of the distal end of the flexible tube 1, and the injection hole 9 is set to form an acute angle with the axis of the distal end of the flexible tube 1, which is close to the inflatable cuff 2, and the angle is 30-60°. Spend.

Preferably, all components of the endotracheal tube are made of uncoated polymeric material, such as polyvinyl chloride, and the inflatable cuff 2 is made of silicone, so that the loop 6 acts as an indicator ring, and the outer Or change the entire width to bright red or blue. The collar 6 can be painted, or contain a pigment, to make it visible in MRT, CT, X-ray and other methods of viewing the position of the collar 6, the methods can vary. For adult patients, it is necessary to set the loop 6 at a distance of 30-45 mm from the upper edge of the inflatable cuff 2, and set the loop 8 at a position close to the upper edge of the inflatable cuff 2 at 0-2 mm. Additionally, longitudinal movement of the inflatable cuff 2 along the distal length of the hose 1 may be provided. The number of injection holes 7 can be from 2 to 15.

In use, the distal end of the hose 1 is inserted into the larynx so that the collar 6 is in the desired position in the throat, in this case the collar 6 is located at the upper edge 15 of the larynx, which can be monitored. This position of the loop 6 is a suitable position for an endotracheal tube, with the injection port 7 directed towards the small ligamentous space in the throat area and the loop 8 adjacent to the upper part of the larynx 14 . A liquid or aerosolized local anesthetic is rapidly injected through the conduit 5 through the channel 11 . In this case, the local anesthetic is provided directly to the small ligamentous space of the throat area through the injection hole 7, through the channels 11, 12, and simultaneously through the injection hole 9, through the channels 11, 13, to the inflatable cuff 2 and the mucous surface of the larynx 14. areas of contact, and the lower portion of the airway. The inflatable cuff 2 is then inflated through the catheter 3 and channel 10 so that the distal end of the hose 1 is firmly in the larynx 14 . According to needs, local anesthetics can be repeatedly injected into the area where the cuff 2 is in contact with the mucous surface of the larynx 14 and/or the lower part of the airway. To monitor the proper position of the endotracheal tube.

Therefore, when the trachea is intubated, the anesthesia of the larynx and the mucous surface of the throat can be performed accurately, smoothly and effectively, preventing the reflex of hemodynamic action. As a result, the dosage of general anesthetics and muscle relaxants is reduced, which helps to save medicine, reduce the poisoning of the patient's body, and make the operation more successful.

The given example is only used to illustrate a possible embodiment of the utility model, and does not limit the scope of legal protection proposed by the claims. Those skilled in the art can easily realize other embodiments of the utility model.

Claims (10)

1. An endotracheal tube comprising a flexible tube, a connector located at the proximal end of the flexible tube and connected to an artificial lung ventilator, and a distal end of the flexible tube, wherein the distal end includes: a ring surrounding the distal end and making it An inflatable cuff in place in the larynx; a longitudinal airway in the wall of the tube that connects the lumen of the inflatable cuff to the inflation device of the cuff; an airway in the wall of the tube for A longitudinal channel for supplying medicine; one or more radial ring channels located in the wall of the hose for supplying medicine, which are connected with the longitudinal channel for supplying medicine and a series of channels located in one or more radial ring channels The injection hole on the outer wall is connected; it is characterized in that it also includes an indicator ring located at the injection hole outside the distal end of the hose or near the injection hole, around the diameter of the hose, and the color of the indicator ring is consistent with that of the hose. The outer color is different, at least from the color of the distal end of the tube, and the indicator ring is visible on the side of the pharynx when the endotracheal tube is in the working position, in this case at the upper edge of the larynx. 2. The endotracheal tube according to claim 1, wherein one end of the longitudinal channel for supplying medicine is connected to a device for supplying medicine, and the other end of the longitudinal channel is connected to one or more radial rings. The channels are connected. 3. An endotracheal tube as claimed in claim 2, characterized in that the longitudinal airway and the longitudinal channel for supplying the medicament are arranged in the wall of the tube symmetrically about the diameter. 4. The endotracheal tube according to claim 1, characterized in that, the tube comprises two or more radial ring passages, and the total fluid resistance of one radial ring passage and its upper injection hole is different from that of the other radial ring passage. The total fluid resistance of the ring channel and its upper injection hole is the same, or the same as the total fluid resistance of each radial ring channel and its upper injection hole. 5. An endotracheal tube as claimed in claim 1, characterized in that the outer wall of the radial ring channel for supplying the medicament is formed as a protruding collar of the tube. 6. The endotracheal tube of claim 5, wherein the indicator ring is made along the collar. 7. An endotracheal tube according to any one of claims 1-5, wherein the injection hole is perpendicular to the axis of the distal end of the tube. 8. The endotracheal tube according to any one of claims 1-5, wherein the injection hole forms an acute angle with the axis of the distal end of the tube close to the inflatable cuff. 9. The endotracheal tube according to any one of claims 1-5, wherein the outer wall of the radial ring channel contains three or more injection holes. 10. The endotracheal tube of claim 9, wherein the injection holes are equally spaced around the diameter of the radial ring channel.

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