Nerve monitoring trachea cannula

Abstract

The utility model discloses a nerve monitoring trachea cannula which comprises a cannula body, an inflation cuff and an inflation connecting line, a detection area and a signal connecting area are arranged on the outer side of the cannula wall of the cannula body, a vocal cord muscle vibration sensor is attached to the detection area, a signal line is packaged in the signal connecting area, the signal line is connected with the vocal cord muscle vibration sensor and transmits signals out, and the inflation cuff is connected with the inflation connecting line. The detection area and the signal connection area can form a trachea cannula structure which is stretched, compressed and bent without being damaged along with the cannula body. The vocal cord muscle vibration sensor is assembled on the outer side of the tube wall of the tube body to collect the vibration signals of the vocal cord muscles instead of using a contact electrode to collect vocal cord muscle electric signals in the traditional technology, and the problems that in the traditional technology, the electrode is hard, and the cost is low are solved. The problems of difficulty in operation, easiness in damaging tissue of a patient by an exposed steel wire, incapability of monitoring an area by an electrode, easiness in electromagnetic interference and the like are solved, so that the intraoperative detection is safer and more accurate, and the surgical risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a nerve monitoring endotracheal tube. Background Art

[0002] A nerve monitoring endotracheal tube is a product used in surgeries for preventing and dealing with unobstructed airways. It can provide an unobstructed ventilation airway for patients. At the same time, this product is also used to connect with a suitable nerve monitor and can be used as a tool for monitoring the recurrent laryngeal nerve signal of patients during surgery.

[0003] The injury of the recurrent laryngeal nerve can lead to complications such as hoarseness, choking during drinking water, and dyspnea in patients after surgery, seriously affecting the postoperative quality of life of patients and even endangering their lives. To reduce the risk of recurrent laryngeal nerve injury in such thyroid surgeries, it is clinically necessary to apply nerve monitoring endotracheal tubes and nerve monitors to monitor the function of the recurrent laryngeal nerve to reduce iatrogenic recurrent laryngeal nerve injury.

[0004] The principle of the existing nerve monitoring endotracheal tube is as follows: taking the tube body as the main structure, an inflatable cuff is arranged at the lower section of the tube body, and the inflatable cuff can be inflated through the cuff inflation tube to expand so as to realize the positioning of the intubation. The electrode connection wire is used to connect the contact electrode to the above-mentioned nerve monitor and form an electrode circuit. When the recurrent laryngeal nerve is electrically stimulated, the vocal cord muscles will vibrate and generate myoelectric signals at the same time. At this time, the contact electrode transmits the myoelectric signals to the myoelectric display screen through the interface box for amplification, and then records the electromyogram and broadcasts it.

[0005] The disadvantages of the existing nerve monitoring endotracheal tube are as follows: 1. The electrode is relatively hard, making the intubation operation difficult and causing discomfort to patients. 2. The exposed steel wire is used for EMG signal monitoring, and the head end of the steel wire has a risk of piercing the endotracheal tube and the balloon when the endotracheal tube bends. 3. The placement position of the electrode requires precision, resulting in difficult operation of the nerve detection endotracheal tube. In the case where the electrode position cannot be accurately placed (the existing devices mostly adopt a linear extension method, and there are still gaps between the electrodes. When the vocal cords happen to be in the gap, the monitoring cannot be carried out), the function of the vocal cords (recurrent laryngeal nerve) cannot be monitored. 4. Surgical instruments such as electrosurgical knives during surgery have a great impact on the myoelectric signals of the vocal cord muscles, thus seriously affecting the nerve monitoring results and unable to effectively detect the function of the vocal cords (recurrent laryngeal nerve). 5. The gap between the coated electrodes is relatively large. Because the doctor will constantly twist and bend the intubation during the process of inserting it into the patient's larynx to make it reach the correct position, and the change of the patient's body position during surgery may cause the electrode that originally contacted the vocal cords to separate, thus unable to obtain the myoelectric signals of the vocal cord muscles. Content of the Utility Model

[0006] In order to solve the above problems, the utility model provides a nerve monitoring endotracheal tube, which is easy to operate, has good safety, accurate detection, is not easy to damage the patient's tissue, and is not easily affected by electromagnetic interference.

[0007] To achieve the above object, the utility model adopts the following technical solutions:

[0008] A nerve monitoring endotracheal tube includes a tube body, an inflatable cuff, and an inflation connecting wire. On the outer side of the tube wall of the tube body, there are a detection area and a signal connection area. The detection area of the tube is attached with a vocal cord muscle vibration sensor, and the signal connection area is encapsulated with a signal wire. The signal wire is connected to the vocal cord muscle vibration sensor and transmits the signal out. The detection area and the signal connection area can form a tracheal intubation structure that can be stretched, compressed, and bent together with the tube body without being damaged.

[0009] As a preference of the above solution, on the outer side of the tube wall of the tube body, along the length direction of the tube body, from bottom to top, it is successively divided into a detection area, an interval area, a signal connection area, and a distal area. The signal wire is connected to the vocal cord muscle vibration sensor in the interval area and extends along the signal connection area to the distal area, and can be connected to an external nerve monitoring device.

[0010] As a preference of the above solution, the vocal cord muscle vibration sensor is wound around the outer side of the tube wall of the tube body for one week.

[0011] As a preference of the above solution, the vocal cord muscle vibration sensor adopts a piezoelectric thin film sensor, which is a five-layer sandwich structure. The outermost two layers are protective layers, the middle two layers are thin copper sheets or copper foils, and the inner layer is a PVDF piezoelectric thin film.

[0012] As a preference of the above solution, the signal wire adopts a shielded wire and is encapsulated on the outer surface of the tube body by a medical film.

[0013] As a preference of the above solution, the connection part between the signal wire and the vocal cord muscle vibration sensor is encapsulated and wrapped by a medical film.

[0014] As a preference of the above solution, the inflatable cuff is arranged at the lower section of the tube body and can be inflated through the inflation connecting wire.

[0015] Due to having the above structure, the beneficial effects of the utility model are as follows:

[0016] 1. In this application, by attaching a vocal cord muscle vibration sensor on the outer side of the tube body to collect the vibration signal of the vocal cord muscle, instead of using a contact electrode to collect the electromyogram signal of the vocal cord muscle in the traditional technology, the problems such as the areas that cannot be monitored by the electrode and the susceptibility to electromagnetic interference in the traditional technology are solved, so that the intraoperative detection is safer and more accurate, and the surgical risk is reduced;

[0017] 2. The vocal cord muscle vibration sensor uses a piezoelectric film sensor, which is a flexible film. It can form a tracheal intubation structure with the tube body that can be stretched, compressed, and bent without being damaged. It is safe and has no hidden danger of damaging the laryngeal trachea. Moreover, it will not increase the difficulty of tracheal intubation. It solves the problems in traditional technologies such as hard electrodes, difficult operation, and the exposed steel wire is easy to damage the patient's tissue. At the same time, during the operation, the sensor will not lose the monitoring signal due to the change of the patient's body position causing the sensor to deviate from the monitoring area.

[0018] 3. The vocal cord muscle vibration sensor is a mechanical energy sensor and is less affected by electromagnetic devices. The signal line uses a shielded wire, which is connected to the sensor and is encapsulated with a medical film at the connection to prevent it from being randomly pulled and further solve the problem of being easily affected by electromagnetic interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the assembly relationship between the vocal cord muscle vibration sensor and the tube body of the present invention;

[0022] Figure 3 It is a front view structural schematic diagram of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the vocal cord muscle vibration sensor of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figures 1 to 4 shown, this embodiment provides a nerve monitoring tracheal intubation, including a tube body 4, an inflatable cuff 6, and an inflation connection line (the inflation connection line may include an inflatable cuff inflation tube 1 and a tracheal intubation connector 2). The outer wall of the tube body 4 is provided with a detection area and a signal connection area. The detection area is attached with a vocal cord muscle vibration sensor 5, and the signal connection area is encapsulated with a signal line 3. The signal line 3 is connected to the vocal cord muscle vibration sensor 5 and transmits the signal. The detection area and the signal connection area can form a tracheal intubation structure with the tube body 4 that can be stretched, compressed, and bent without being damaged.

[0026] Specifically:

[0027] The outer wall of the tube body 4 is sequentially divided into a detection area 8, a spacer area 9, a signal connection area 10, and a distal area 11 from bottom to top along the length direction of the tube body. The signal line 3 is connected to the vocal cord muscle vibration sensor 5 in the spacer area 9 and extends along the signal connection area 10 to the distal area 11, and can be connected to an external nerve monitoring device. The tube body 4 is a tube body with a reinforcing spring wire inside the lumen.

[0028] The vocal cord muscle vibration sensor 5 is wound around the outer wall of the tube body 4 for one week. The vocal cord muscle vibration sensor 5 uses a piezoelectric film sensor, which is a sensor mainly composed of a piezoelectric film such as polyvinylidene fluoride (PVDF). This type of sensor is a high-sensitivity strain sensor, which can effectively collect the vibration of the vocal cord muscles, and does not require external power supply, being a passive device. The sensor converts the vibration of the vocal cord muscles into an electrical signal, which is finally read by an external detection device. The advantages of the vocal cord muscle vibration sensor are sensitivity, passive safety, and strong anti-interference ability. The specific structure is a five-layer sandwich structure. The outermost two layers are protective layers 12, both composed of two insulating materials, polyimide and polyethylene terephthalate plastics. The middle two layers are thin copper sheets or copper foils 13, and the electrodes and leads are led out by the bonding method of conductive silver glue. The inner layer is a PVDF piezoelectric film 14.

[0029] The signal line 3 uses a shielded wire and is encapsulated on the outer surface of the tube body 4 by a medical film 7. The connection between the signal line 3 and the vocal cord muscle vibration sensor 5 is encapsulated and wrapped with a medical film to prevent it from being randomly pulled.

[0030] The tube body 4 is connected to the tracheal intubation joint 2. The inflatable cuff 6 is arranged at the lower section of the tube body 4 and can be inflated through the inflatable cuff inflation tube 1. The inflatable cuff 6 is used to fix and seal the airway, fix it so that it will not fall out, and seal the airway so that the ventilator can form a closed working state; while the vocal cord muscle vibration sensor 5 is at the lower section of the tube body 4, located on the outer wall. The signal line 3 is connected to the vocal cord muscle vibration sensor 5 and extends axially along the tube body 4 to the outside of the tube body. Through the signal line 3, the vocal cord muscle vibration sensor 5 forms an electrical connection with the nerve monitoring device.

[0031] The working principle of the above structure:

[0032] During use, the distal end of the tube body 4 extends from the trachea into the human body, and its outer wall contacts the human body cavity wall. The vocal cord muscle vibration sensor 5 assembled in the detection area can be bent, stretched, and compressed arbitrarily without falling off and breaking. The sensor surrounds the tracheal intubation for one week. As long as the glottis is placed in this area, accurate vibration signals can be collected. When the recurrent laryngeal nerve is stimulated, the nerve conducts the vibration of the vocal cords. At this time, the vocal cord muscle vibration sensor 5 can collect the vibration and transmit the monitored vibration signal to the external nerve monitoring device through the signal line 3. The nerve monitoring device processes through the processor and then draws, records, and displays the vocal cord muscle vibration diagram, thereby making the intraoperative detection safer and more accurate and reducing the surgical risk.

[0033] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A nerve monitoring endotracheal tube, characterized in that: It includes a tube body, an inflatable cuff, and an inflation connection line. On the outer side of the tube wall of the tube body, there are a detection area and a signal connection area. The detection area is attached with a vocal cord muscle vibration sensor, and the signal connection area is encapsulated with a signal line. The signal line is connected to the vocal cord muscle vibration sensor and transmits the signal. The detection area and the signal connection area can form a tracheal intubation structure that can be stretched, compressed, and bent together with the tube body without being damaged.

2. The nerve monitoring endotracheal tube according to claim 1, characterized in that: On the outer side of the tube wall of the tube body, along the length direction of the tube body, it is sequentially divided into a detection area, a spacer area, a signal connection area, and a distal area from bottom to top. The signal line is connected to the vocal cord muscle vibration sensor in the spacer area and extends along the signal connection area to the distal area, and can be connected to an external nerve monitoring device.

3. A nerve monitoring endotracheal tube according to claim 1, characterized in that: The vocal cord muscle vibration sensor winds around the outer side of the tube wall of the tube body for one week.

4. A nerve monitoring endotracheal tube according to claim 1, wherein: The vocal cord muscle vibration sensor uses a piezoelectric film sensor, which is a five-layer sandwich structure. The outermost two layers are protective layers, the middle two layers are thin copper sheets or copper foils, and the inner layer is a PVDF piezoelectric film.

5. A nerve monitoring endotracheal tube according to claim 1, characterized in that: The signal line uses a shielded wire and is encapsulated on the outer surface of the tube body with a medical film.

6. A nerve monitoring endotracheal tube according to claim 1, wherein: The connection between the signal line and the vocal cord muscle vibration sensor is encapsulated and wrapped with a medical film.

7. The nerve monitoring endotracheal tube according to claim 1, wherein: The inflatable cuff is arranged at the lower section of the tube body and can be inflated through the inflation connection line.

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