Blood supply monitoring device used after esophageal surgery

Abstract

The invention provides a blood supply monitoring device used after an esophagus operation, and relates to the technical field of medical instruments. The blood supply monitoring device comprises a hose and a monitoring module, and the monitoring module is arranged on the hose; the hose is connected with a nasogastric tube and is fed into a body along with the nasogastric tube; the monitoring module is used for monitoring blood flow information of the esophageal anastomotic stoma, and the blood flow information comprises blood flow amplitude; the monitoring module is started once at a preset time interval and runs for a preset time length each time; the monitoring module is connected with a control module, and the control module is used for processing the blood flow information based on a preset formula and obtaining SVI; the control module is connected with an alarm module, and the alarm module is used for generating an alarm signal when the SVI is lower than a preset value. The blood supply monitoring device used after the esophageal surgery has the advantages of being safe, non-invasive, easy to operate and the like, and the blood supply condition of the esophageal anastomotic stoma of a patient can be continuously monitored in real time.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a blood supply monitoring device for after esophageal surgery. Background Art

[0002] Esophageal cancer is one of the common malignant tumors in China. Among them, surgical resection of the tumor is the main treatment method for early and locally advanced esophageal cancer. Anastomotic leakage is the most common serious complication after esophageal cancer surgery and one of the main causes of postoperative death.

[0003] Anastomotic leakage often occurs about one week after surgery and is closely related to insufficient local blood perfusion. Therefore, monitoring the blood supply of the anastomosis during and after surgery can early evaluate the risk of anastomotic leakage, which is beneficial for clinicians to intervene in time.

[0004] The existing esophageal anastomotic blood supply detection techniques include indocyanine green fluorescence angiography. The operation method of this technique is to inject a fluorescent dye into the patient's blood vessels during the operation, and then use a specific light source to excite the fluorescence. Observing the distribution of the fluorescence can indicate the local blood supply situation. However, this technique requires surgery, and the contrast agent injected into the blood vessels also brings the risk of allergy. Moreover, it cannot continuously monitor the recovery of blood supply after surgery, and its clinical large-scale application is limited due to cumbersome operation and cost problems.

[0005] How to simply operate, safely and continuously monitor the blood supply of the anastomosis is an urgent problem to be solved at present. Summary of the Invention

[0006] The purpose of this application is to overcome the defects of the prior art and provide a blood supply monitoring device for after esophageal surgery to solve the problems in the prior art.

[0007] To solve the above problems, an embodiment of this application provides a blood supply monitoring device for after esophageal surgery, including a hose and a monitoring module. The monitoring module is arranged on the hose; the hose is used to be connected with a nasogastric tube and is sent into the body along with the nasogastric tube; the monitoring module is used to monitor the blood flow information of the esophageal anastomosis, and the blood flow information includes blood flow amplitude; wherein, the monitoring module is started once every preset time interval and runs for a preset duration each time; The monitoring module is connected with a control module, and the control module is used to process the blood flow information based on a preset formula; wherein, The preset formula is: ; f_d(t) represents the Doppler shift; A(t) represents the blood flow amplitude; T represents the monitoring time window; K represents the calibration coefficient; The control module is connected with an alarm module. Among them, the alarm module is used to generate an alarm signal when SVI is lower than a preset value.

[0008] In a possible implementation, the monitoring module includes a Doppler probe; wherein, the Doppler probe includes a first support layer, a sensor layer, and a second support layer, and the sensor layer is disposed between the first support layer and the second support layer.

[0009] In a possible implementation, the sensor layer includes a first electrode, a second electrode, and a piezoelectric crystal array module; The piezoelectric crystal array module is disposed between the first electrode and the second electrode.

[0010] In a possible implementation, an installation groove is provided on an outer wall surface of the hose, and the monitoring module is installed in the installation groove.

[0011] In a possible implementation, a communication module is provided inside the hose, and the communication module is used for signal transmission. Among them, the blood flow information is transmitted to the outside of the body through the communication module.

[0012] In a possible implementation, the communication module includes a wireless communication module and / or a signal line.

[0013] In a possible implementation, the calibration coefficient is adjusted based on the monitored part of the esophagus, and the preset value corresponds to the part of the esophagus.

[0014] In a possible implementation, a power supply module is further included, and the power supply module is used to provide electrical energy.

[0015] In a possible implementation, the hose is detachably connected to the nasogastric tube.

[0016] In a possible implementation, the hose is threadedly connected to the nasogastric tube, or the hose is snap-connected to the nasogastric tube.

[0017] The beneficial effects of the present application include: The blood supply monitoring device for postoperative esophagus proposed by the present application includes a hose, a monitoring module, a control module, and an alarm module. The monitoring module is disposed on the hose, the hose is connected to a nasogastric tube, and the hose and the monitoring module on the hose are sent into the patient's body through the nasogastric tube. The insertion and removal of the nasogastric tube have the advantages of non-invasiveness, short time consumption, convenient and fast operation, etc.

[0018] By combining the blood supply monitoring device with the nasogastric tube, the anastomotic stoma can be monitored based on the nasogastric tube. In this way, medical staff can safely and non-invasively, and continuously monitor the blood supply of the patient's esophageal anastomotic stoma in real time without complex operations. In addition, it has the advantages of convenient operation and high clinical feasibility. Among them, during the monitoring process, when the SVI is lower than the preset value, the alarm module will generate an alarm signal to remind medical staff to quickly respond for corresponding treatment and handling.

[0019] The blood supply monitoring device for postoperative esophagus has the advantages of being safe and non-invasive, simple to operate, etc., and can monitor the blood supply of the patient's esophageal anastomotic stoma in real time and continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0021] Figure 1 Shows a schematic diagram of a flexible tube equipped with a monitoring module; Figure 2 Shows a schematic diagram of the connection between some modules of a blood supply monitoring device; Figure 3 Shows a schematic diagram of a flexible tube without a monitoring module installed; Figure 4 Shows a partial cross-sectional view of a monitoring module; Figure 5 Shows a schematic diagram of a piezoelectric crystal array module.

[0022] MAIN ELEMENT SYMBOL DESCRIPTION: 100 - flexible tube; 110 - installation groove; 200 - monitoring module; 210 - first support layer; 220 - sensor layer; 221 - piezoelectric crystal array module; 222 - first electrode; 223 - second electrode; 230 - second support layer; 240 - electromagnetic shielding layer; 300 - control module; 400 - alarm module; 500 - communication module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will describe in detail the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as limiting the present application.

[0024] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0025] Embodiment Refer to Figure 1 and Figure 2 In this embodiment, a blood supply monitoring device for after esophageal surgery is proposed, which includes a flexible tube 100 and a monitoring module 200. The monitoring module 200 is arranged on the flexible tube 100. The flexible tube 100 is made of medical materials and has the characteristics of soft material, non-toxicity, acid corrosion resistance, etc.

[0026] As Figure 3 shown, an installation groove 110 is arranged on the outer wall surface of the flexible tube 100, and the monitoring module 200 is installed in the installation groove 110.

[0027] The flexible tube 100 is used to be connected with a nasogastric tube and is sent into the body along with the nasogastric tube.

[0028] The monitoring module 200 is used to monitor the blood flow information of the esophageal anastomosis, and the blood flow information includes blood flow amplitude.

[0029] The monitoring module 200 can adopt an intermittent working mode. Specifically, the monitoring module 200 starts once every preset time interval, and each time it runs for a preset duration. The preset time and the preset duration can be set according to needs. The preset time is 10 minutes, 15 minutes, 20 minutes, etc., and the preset duration is 100 seconds, 110 seconds, 120 seconds, etc. For example, the monitoring module 200 starts once every 15 minutes and runs for 120 seconds each time. In this way, the monitoring module 200 can collect data for 120 seconds.

[0030] When the blood supply monitoring device is powered by a battery, the monitoring module 200 can improve the battery life by adopting an intermittent working mode, and at the same time, it will not affect the monitoring of the blood supply state.

[0031] The monitoring module 200 is connected to a control module 300, and the control module 300 is used to process the blood flow information based on a preset formula, where The preset formula is: ; \(f_d(t)\) represents the Doppler shift; \(A(t)\) represents the blood flow amplitude; \(T\) represents the monitoring time window; \(K\) represents the calibration coefficient.

[0032] The Doppler shift is 7.5 - 10 MHz, and the monitoring time window is 3 - 15 seconds.

[0033] The control module 300 is connected to an alarm module 400. Among them, the alarm module 400 is used to generate an alarm signal when the SVI is lower than a preset value. The range of SVI can be between 30 and 100. Specifically, a specific value within the range can be selected according to the actual situation.

[0034] Both the control module 300 and the alarm module 400 can be located outside the patient's body. Among them, the control module 300 can be communicatively connected to the monitoring module 200 wirelessly or by wire.

[0035] The nasogastric tube is a commonly used medical device in clinical practice. Under the professional operation of medical staff, the nasogastric tube is inserted into the body through the nasal cavity, passes through the esophagus, and is sent into the stomach, so that food can bypass the surgical incision and enter the digestive tract, thus protecting the incision. The insertion and removal of the nasogastric tube are both non-invasive, time-consuming short, and can be completed outside the operating room, with convenient and fast operation.

[0036] The monitoring module 200 is arranged on the flexible tube 100. The flexible tube 100 is connected to the nasogastric tube, and the flexible tube 100 and the monitoring module 200 on the flexible tube 100 are sent into the patient's body through the nasogastric tube. The insertion and removal of the nasogastric tube have the advantages of non-invasiveness, short time consumption, convenient and fast operation, etc.

[0037] By combining the blood supply monitoring device with the nasogastric tube, the anastomotic situation is monitored on the basis of the nasogastric tube. In this way, medical staff can safely and non-invasively, and continuously monitor the blood supply situation of the patient's esophageal anastomosis in real time without complex operations. In addition, it also has the advantages of convenient operation and high clinical feasibility. Among them, during the monitoring process, when the SVI is lower than the preset value, the alarm module 400 will generate an alarm signal, thus reminding medical staff to quickly respond for corresponding treatment and handling.

[0038] In this embodiment, the monitoring module 200 includes a Doppler probe.

[0039] Such as Figure 4As shown, the Doppler probe includes a first support layer 210, a sensor layer 220, and a second support layer 230. The sensor layer 220 is disposed between the first support layer 210 and the second support layer 230. The first support layer 210 and the second support layer 230 serve to provide support and protection for the sensor layer 220 and the like. Among them, an electromagnetic shielding layer 240 is disposed between the second support layer 230 and the sensor layer 220. The electromagnetic shielding layer 240 is used to shield external electromagnetic signals to ensure the accuracy of the data monitored by the monitoring module 200.

[0040] Further, the sensor layer 220 includes a first electrode 222, a second electrode 223, and a piezoelectric crystal array module 221. The piezoelectric crystal array module 221 is disposed between the first electrode 222 and the second electrode 223. Among the first electrode 222 and the second electrode 223, one is the positive electrode and the other is the negative electrode. The first electrode 222 and the second electrode 223 can be made of Ga-In liquid metal.

[0041] Figure 5 An array form of a piezoelectric crystal is shown. In other embodiments, in the piezoelectric crystal array module 221, the specific distribution form of the piezoelectric crystals can also be set according to actual situations.

[0042] After the blood supply monitoring device is placed into the patient's body, the piezoelectric crystal array module 221 faces the esophageal anastomosis. Among them, compared with the second support layer 230, the first support layer 210 is closer to the esophageal anastomosis.

[0043] In this embodiment, a communication module 500 is disposed inside the hose 100. The communication module 500 is used for signal transmission. Among them, the blood flow information is transmitted to the outside of the body through the communication module 500. Specifically, the communication module 500 is used to transmit the blood flow signal to a terminal outside the body, and the control module 300 is disposed in the terminal.

[0044] The communication module 500 includes a wireless communication module or / and a signal line. The wireless communication module includes a Bluetooth module, a wifi module, etc.

[0045] The calibration coefficient is adjusted based on the monitored part of the esophagus, and the preset value corresponds to the part of the esophagus.

[0046] The position of the esophageal anastomosis will be distributed in the upper, middle, or lower part of the esophagus according to the patient's condition. There are certain differences in the hemodynamic characteristics of the blood flow in different parts of the esophagus. Therefore, it is necessary to pre-adjust the calibration base based on the monitored part of the esophagus. Correspondingly, there will also be differences in the preset values corresponding to different parts of the esophagus.

[0047] In some embodiments, for the upper part of the esophagus, the corresponding preset value is 50; for the middle part of the esophagus, the corresponding preset value is 60; for the lower part of the esophagus, the corresponding preset value is 70. Specifically, for different patients, the preset value can also be adjusted according to the actual situation.

[0048] In this embodiment, the blood supply monitoring device further includes a power supply module for providing electrical energy. The power supply module can be a battery.

[0049] In addition to this battery, the terminal can be connected to the mains power, and the power supply circuit board on the terminal is used to supply power to modules such as the monitoring module 200, the control module 300, and the alarm module 400. Among them, a power supply cable is arranged inside the hose 100. One end of the power supply cable is connected to the monitoring module 200, and the other end is connected to the terminal.

[0050] In this embodiment, the hose 100 is detachably connected to the nasogastric tube. The hose 100 is dimensionally matched with the nasogastric tube.

[0051] In one embodiment, the hose 100 is threadedly connected to the nasogastric tube. For example, an external thread is provided on the outer wall of one end of the hose 100, and an internal thread is provided on the inner wall of one end of the nasogastric tube. Through the threaded connection between the external thread and the internal thread, the connection between the hose 100 and the nasogastric tube can be achieved.

[0052] In another embodiment, the hose 100 is snap-connected to the nasogastric tube. For example, a snap is provided at one end of the hose 100, and a slot is provided at one end of the nasogastric tube. Through the snap connection between the snap and the slot, the connection between the hose 100 and the nasogastric tube can be achieved.

[0053] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0054] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A blood supply monitoring device for post-esophageal surgery, characterized in that: It comprises a hose and a monitoring module, wherein the monitoring module is arranged on the hose; the hose is used to be connected to a nasogastric tube and is sent into the body along with the nasogastric tube; the monitoring module is used to monitor the blood flow information of the esophageal anastomosis, wherein the blood flow information includes the blood flow amplitude; wherein the monitoring module is started once at a preset time interval, and each operation has a preset duration; The monitoring module is connected to a control module, and the control module is used to process the blood flow information based on a preset formula; wherein, The default formula is: ; f_d(t) represents Doppler frequency shift; A(t) represents the blood flow amplitude; T represents the monitoring time window; K represents the calibration coefficient; The control module is connected to an alarm module, wherein the alarm module is used to generate an alarm signal when the SVI is lower than a preset value.

2. The blood supply monitoring device for post-esophageal surgery according to claim 1, characterized in that: The monitoring module comprises a Doppler probe; wherein the Doppler probe comprises a first supporting layer, a sensor layer and a second supporting layer, and the sensor layer is arranged between the first supporting layer and the second supporting layer.

3. The blood supply monitoring device for post-esophageal surgery according to claim 2, characterized in that: The sensor layer includes a first electrode, a second electrode and a piezoelectric crystal array module; The piezoelectric crystal array module is disposed between the first electrode and the second electrode.

4. The blood supply monitoring device for post-esophageal surgery according to claim 1, characterized in that: The outer wall surface of the hose is provided with a mounting groove, and the monitoring module is installed in the mounting groove.

5. The blood supply monitoring device for post-esophageal surgery according to claim 4, characterized in that: A communication module is disposed inside the hose, and the communication module is used for transmitting signals, wherein the blood flow information is transmitted to the outside of the body through the communication module.

6. The blood supply monitoring device for post-esophageal surgery according to claim 5, characterized in that: The communication module includes a wireless communication module and / or a signal line.

7. The blood supply monitoring device for post-esophageal surgery according to claim 1, characterized in that: The calibration coefficient is adjusted based on the location of the monitored esophagus, and the preset value corresponds to the location of the esophagus.

8. The blood supply monitoring device for post-esophageal surgery according to claim 1, characterized in that: It also includes a power supply module, which is used to provide electrical energy.

9. The blood supply monitoring device for post-esophageal surgery according to claim 1, characterized in that: The hose is detachably connected to the nasogastric tube.

10. The blood supply monitoring device for post-esophageal surgery according to claim 9, characterized in that: The hose is threadably connected to the nasogastric tube, or the hose is clamped to the nasogastric tube.

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