CN113230491B - CT contrast agent extravasation monitoring interruption device and application method - Google Patents

Abstract

The invention discloses a CT contrast agent extravasation monitoring interrupt device which comprises a wearing device, a control terminal and an electric valve, wherein the wearing device is arranged in the needle tip direction of an indwelling needle on a monitored arm, the wearing device comprises a miniature camera, a processor unit, a data transceiver unit, a shell and two wristbands, the processor unit and the data transceiver unit are respectively arranged in an inner cavity of the shell, the miniature camera is arranged at the top of the shell, two sides of the shell are respectively connected with one wristband, the miniature camera faces the indwelling needle, the electric valve is arranged at the liquid inlet end of the indwelling needle, the miniature camera is connected with the input end of the control terminal through the processor unit and the data transceiver unit, and the output end of the control terminal is connected with the control end of the electric valve. The invention also discloses an application method of the invention, which can effectively reduce the occurrence of leakage of the contrast agent, can discover the leakage of the contrast agent in time and prevent the contrast agent from being continuously injected, and can relieve the pain of patients.

Description

CT contrast agent extravasation monitoring interruption device and application method

Technical Field

The present invention relates to the medical field, and in particular to a CT contrast agent extravasation monitoring interruption device and an application method thereof.

Background technique

Before CT and MRI enhancement examinations, an indwelling needle needs to be implanted into the patient's blood vessels, and then the contrast agent is injected into the blood vessels through the indwelling needle to reach the designated site, increase the contrast between normal tissue and lesion tissue, and facilitate diagnosis. To ensure that the contrast agent reaches the lesion site in a short time, a high-pressure syringe is needed to push the contrast agent at a flow rate of 2-7ml/second. The contrast agent itself has the physical and chemical properties of high viscosity and high osmotic pressure, and it is very easy for the drug to leak out of the blood vessels. Contrast agent leakage of 20ml or less is mild leakage, and generally has fewer adverse reactions. 20-40ml is moderate extravasation, and more than 40ml is severe extravasation. Moderate and severe contrast agent leakage will cause limb swelling, local skin blisters, pain and other adverse reactions. In severe cases, osteofascial compartment syndrome will occur, which increases the patient's pain. At present, extravasation is basically moderate or above, and there is an urgent need for a device or method that can identify contrast agent extravasation at an early stage.

Summary of the invention

The technical problem to be solved by the present invention is: in response to the technical problems existing in the prior art, the present invention provides a CT contrast agent extravasation monitoring interruption device and an application method, which can effectively reduce the occurrence of contrast agent leakage, and can also timely detect contrast agent leakage and prevent the contrast agent from continuing to be injected, thereby alleviating the patient's pain.

In order to solve the above technical problems, the technical solution proposed by the present invention is:

A CT contrast agent extravasation monitoring interruption device comprises a wearable device, a control terminal and an electric valve, wherein the wearable device is arranged in the needle tip direction of an indwelling needle on the monitored arm, the wearable device comprises a micro camera, a processor unit, a data transceiver unit, a shell and two wristbands, the processor unit and the data transceiver unit are respectively arranged in the inner cavity of the shell, the micro camera is arranged at the top of the shell, the two sides of the shell are respectively connected to a wristband, the micro camera faces the indwelling needle, the electric valve is arranged at the liquid inlet end of the indwelling needle, the micro camera is connected to the input end of the control terminal through the processor unit and the data transceiver unit, and the output end of the control terminal is connected to the control end of the electric valve.

Furthermore, the wearable device also includes a distance sensor and two support legs, the support legs are respectively arranged at the bottom of the shell, the wristbands and the support legs correspond one to one, each wristband is respectively connected to the end of the corresponding support leg, the distance sensor is arranged at the bottom of the shell and between the two support legs, and the output end of the distance sensor is connected through the processor unit and the input end of the data transceiver unit.

Furthermore, the wearable device also includes a first pressure sensor and an elastic band arranged between the two wristbands, the two ends of the elastic band are respectively connected to the ends of the two support legs, the first pressure sensor is arranged at the bottom of the elastic band, and the output end of the first pressure sensor is connected to the input end of the processor unit and the data transceiver unit.

Furthermore, the wearable device also includes an electric heater, a relay and a power supply unit. The electric heater is arranged on the top of the elastic band, and the relay and the power supply unit are respectively arranged in the inner cavity of the shell. The power supply end of the electric heater is connected to the power supply unit through the relay, and the output end of the processor unit is connected to the control end of the relay.

Furthermore, the wearable device also includes a motor and a boss arranged at the front end of the shell, the motor is arranged on the boss, the rotating shaft of the motor is connected to the micro camera, and the output end of the processor unit is connected to the control end of the motor.

Furthermore, a groove is provided on the top of the shell, and the micro camera is arranged in the groove.

Furthermore, the other end of the wristband away from the shell is provided with a strap, a buckle or Velcro.

The present invention also proposes a CT contrast agent extravasation monitoring and interruption system, comprising a CT contrast agent extravasation monitoring and interruption device and a retention needle, a high-pressure connecting tube and a high-pressure syringe connected in sequence, wherein the CT contrast agent extravasation monitoring and interruption device is any of the CT contrast agent extravasation monitoring and interruption devices described above, and the electric valve of the CT contrast agent extravasation monitoring and interruption device is sleeved on the outside of the high-pressure connecting tube.

Furthermore, the CT contrast agent extravasation monitoring interruption device also includes a second pressure sensor, which is arranged at the output end of the high-pressure injector, the second pressure sensor is connected to the input end of the control terminal, and the output end of the control terminal is connected to the control end of the high-pressure injector.

The present invention also provides an application method of a CT contrast agent extravasation monitoring interruption device, comprising the following steps:

S1) before the injection starts, the micro camera obtains the current image, the distance sensor obtains the current distance information, the first pressure sensor obtains the current pressure information and sends it to the processor unit, the processor unit sends the current image, current distance information and current pressure information to the control terminal through the data transceiver unit respectively, after the control terminal receives the current image, current distance information and current pressure information, if the current image meets the requirements, the current image is used as the original image, the current distance information is used as the original distance information, the current pressure information is used as the original pressure information and jumps to step S2), otherwise the control terminal sends a motor instruction to the data transceiver unit, the data transceiver unit sends the motor instruction to the processor unit, the processor unit controls the motor to rotate according to the motor instruction, and then obtains the current image, current distance information and current pressure information and sends them to the control terminal through the data transceiver unit until the current image meets the requirements;

S2) After the injection starts, the control terminal sends a heating instruction to the data transceiver unit, the data transceiver unit sends the heating instruction to the processor unit, the processor unit controls the relay to turn on according to the heating instruction, the micro camera obtains the current image, the distance sensor obtains the current distance information, the pressure sensor obtains the current pressure information and sends it to the processor unit, the processor unit sends the current image, the current distance information and the current pressure information to the control terminal through the data transceiver unit, the control terminal receives the current image sent by the data transceiver unit at intervals of 0.5 seconds, and receives the current distance information and current pressure information sent by the data transceiver unit in real time;

S3) the control terminal compares the current image with the original image, the current distance information with the original distance information, and the current pressure information with the original pressure information. If the color of the current image changes relative to the same part in the original image, or swelling or enlarged pores occur, or the change value of the current distance information relative to the original distance information exceeds 0.1 to 0.5 cm, or the change value of the current pressure information relative to the original pressure information exceeds a preset first threshold, then the process jumps to step S4), otherwise, the process returns to step S2 until the injection is completed;

S4) The control terminal controls the electric valve to close and sends a stop heating instruction to the data transceiver unit. The data transceiver unit sends the stop heating instruction to the processor unit. The processor unit controls the relay to disconnect according to the stop heating instruction. The control terminal also obtains the pressure information sent by the second pressure sensor in real time. If the difference between the pressure information of the next time period and the pressure information of the current time period is greater than the preset second threshold value, the control terminal controls the high-pressure injector to close.

Compared with the prior art, the advantages of the present invention are:

1. The present invention includes a micro camera. Medical staff can observe the image near the indwelling needle taken by the micro camera through the control terminal, and can timely determine whether contrast agent leakage occurs. At the same time, the present invention also includes an electric valve. If contrast agent leakage occurs again, the medical staff operates the control terminal to close the electric valve, which can prevent the contrast agent from being injected further, avoid more serious leakage, and relieve the patient's pain;

2. The present invention includes a distance sensor disposed at the bottom of the housing of the wearable device, which can reflect the swelling of the injection area of the indwelling needle in real time according to the change of the relative distance of the reference object, avoiding the situation where the swelling outside the shooting area of the micro camera cannot be monitored, and improving the monitoring range;

3. The present invention includes an elastic band arranged at the bottom of the housing of the wearable device, and a first pressure sensor is arranged at the bottom of the elastic band, which can transmit the pressure information of the epidermis of the injection area of the indwelling needle in real time. The medical staff can adjust the flow rate of contrast agent injection according to the pressure information, thereby reducing the patient's discomfort and preventing contrast agent leakage;

4. The present invention sets an electric heater on the top of the elastic band. During the injection process, the processor unit enables the relay, and the power supply end of the electric heater and the power supply unit are connected to generate heat, thereby applying heat to the injection area of the indwelling needle, so that the injected contrast agent is heated to reduce viscosity, reduce the pressure on the blood vessels, and reduce the incidence of contrast agent leakage;

5. The method of the present invention can accurately and timely confirm and handle contrast agent leakage by comparing the current image with the original image, the current distance information with the original distance information, and the current pressure information with the original pressure information during the injection process, and by analyzing multiple information, thereby improving the efficiency of handling contrast agent leakage.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a system structure diagram of an embodiment of the present invention.

FIG. 2 is a front view of the wearable device in an embodiment of the present invention.

FIG. 3 is a top view of the wearable device in an embodiment of the present invention.

FIG. 4 is a side view of the wearable device in use according to an embodiment of the present invention.

FIG. 5 is a block diagram showing the connection relationship of electrical components in an embodiment of the present invention.

Legend: 1-wearable device, 2-control terminal, 3-electric valve, 11-housing, 12-wristband, 13-bracket leg, 14-elastic band, 15-motor, 16-boss, 101-micro camera, 102-processor unit, 103-data transceiver unit, 104-distance sensor, 105-first pressure sensor, 106-heating plate, 107-relay, 108-power supply unit.

Detailed ways

The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

As shown in Figures 1 to 4, the present invention proposes a CT contrast agent extravasation monitoring interruption device, including a wearable device 1, a control terminal 2 and an electric valve 3. The wearable device 1 is arranged in the needle tip direction of the indwelling needle on the monitored arm. The wearable device includes a micro camera 101, a processor unit 102, a data transceiver unit 103, a shell 11 and two wristbands 12. The processor unit 102 and the data transceiver unit 103 are respectively arranged in the inner cavity of the shell 11, and the micro camera 101 is arranged at the top of the shell 11. The two sides of the shell 11 are respectively connected to a wristband 12. The micro camera 101 faces the indwelling needle. Specifically, the distance between the micro camera 101 and the indwelling needle is 0.5 cm. The electric valve 3 is arranged at the liquid inlet end of the indwelling needle connected to the high-pressure delivery tube. As shown in Figure 5, the micro camera 101 is connected to the input end of the control terminal 2 through the processor unit 102 and the data transceiver unit 103, and the output end of the control terminal 2 is connected to the control end of the electric valve 3.

Through the above structure, in this embodiment, the micro camera 101 captures the image near the indwelling needle and sends the captured image data to the processor unit 102. After receiving the image data, the processor unit 102 forwards it to the data transceiver unit 103, and the data transceiver unit 103 forwards the image data to the control terminal 2. The medical staff checks the image near the indwelling needle through the control terminal 2. If color changes, swelling and enlarged pores are found, an enable signal is sent to the control end of the electric valve 3 through the control terminal 2. In this embodiment, the electric valve 3 adopts a normally open electric valve, so that the electric valve 3 is closed, preventing the contrast agent from continuing to be injected, avoiding more serious leakage, and alleviating the patient's pain.

As shown in FIG4 , when contrast agent leaks, the swelling area may be outside the shooting area of the micro camera 101. Therefore, as shown in FIG2 , the wearable device 1 in this embodiment further includes a distance sensor 104 and two bracket legs 13, the bracket legs 13 are respectively arranged at the bottom of the housing 11, the wristband 12 corresponds to the bracket legs 13 one by one, and each wristband 12 is respectively connected to the end of the corresponding bracket leg 13. The distance sensor 104 is arranged at the bottom of the housing 11 and between the two bracket legs 13. As shown in FIG5 , the output end of the distance sensor 104 is connected to the input end of the data transceiver unit 103 through the processor unit 102. By setting the distance sensor 104 at the bottom of the housing 11, the swelling of the injection area of the indwelling needle can be reflected in real time according to the change of the relative distance of the reference object, avoiding the situation that the swelling outside the shooting area of the micro camera 101 cannot be monitored, and improving the monitoring range.

As shown in FIG. 2 and FIG. 4 , the wearable device 1 in this embodiment further includes a first pressure sensor 105 and an elastic band 14 disposed between two wristbands 12, the two ends of the elastic band 14 are connected to the ends of the two bracket legs 13, and the first pressure sensor 105 is disposed at the bottom of the elastic band 14. As shown in FIG. 5 , the output end of the first pressure sensor 105 is connected to the input end of the data transceiver unit 103 through the processor unit 102. The elastic band 14 presses the first pressure sensor 105 against the epidermis of the monitored arm, so that the first pressure sensor 105 can monitor the pressure information of the epidermis in the injection area of the indwelling needle and send it to the control terminal 2 in turn through the processor unit 102 and the data transceiver unit 103. The medical staff checks the pressure information through the control terminal 2, and can adjust the flow rate of contrast agent injection according to the pressure information, thereby reducing the patient's discomfort and preventing contrast agent leakage. At the same time, according to the changes in pressure information at different time periods, the medical staff can also determine whether contrast agent leakage occurs, so as to deal with it in time.

As shown in Figures 2 to 4, the wearable device 1 in this embodiment also includes a heating plate 106, a relay 107 and a power supply unit 108. In this embodiment, the relay 107 is a normally open relay. The heating plate 106 is arranged on the top of the elastic band 14, and the relay 107 and the power supply unit 108 are respectively arranged in the inner cavity of the shell 11. As shown in Figure 5, the power supply end of the heating plate 106 is connected to the power supply unit 108 through the relay 107, and the output end of the processor unit 102 is connected to the control end of the relay 107. In order to reduce the patient's discomfort, in this embodiment, the above-mentioned structure is used to apply heat to the injection area of the indwelling needle, so that the injected contrast agent can reduce viscosity after heating, reduce the pressure on the blood vessels, and reduce the occurrence of contrast agent leakage. However, if contrast agent leakage occurs, continuing to apply heat will aggravate the swelling. Therefore, in this embodiment, a relay 107 is set between the electric heater 106 and the power supply unit 108. When contrast agent leakage occurs, the medical staff sends an instruction to the data transceiver unit 103 through the control terminal 2, and the data transceiver unit 103 forwards the instruction to the processor unit 102. After receiving the instruction, the processor unit 102 stops enabling the relay 107, so that the relay 107 is disconnected.

As shown in Figures 2 to 4, the wearable device 1 in this embodiment also includes a motor 15 and a boss 16 arranged at the front end of the housing 11, the motor 15 is arranged on the boss 16, and the rotating shaft of the motor 15 is connected to the micro camera 101. As shown in Figure 5, the output end of the processor unit 102 is connected to the control end of the motor 15. Through the above structure, medical staff can send instructions to the data transceiver unit 103 through the control terminal 2, and the data transceiver unit 103 forwards the instructions to the processor unit 102. After receiving the instructions, the processor unit 102 enables the motor 15 to rotate forward or reverse, and the rotation of the motor 15 drives the micro camera 101 to rotate, thereby expanding the range that the micro camera 101 can monitor. Medical staff can adjust the angle of the micro camera 101 according to actual needs to obtain a suitable image.

In this embodiment, the power supply unit 108 can be connected to the power supply ends of the motor 15, the micro camera 101, the processor unit 102, the data transceiver unit 103, the distance sensor 104, and the first pressure sensor 105 respectively to provide power for these electrical components.

In this embodiment, the control terminal 2 is a PC, and the processor unit 102 is a PLC.

In this embodiment, the elastic band 14 is a rubber band or a silicone band with a thickness of 0.5-1.5 mm.

In this embodiment, a groove is provided on the top of the housing 11 , and the micro camera 101 is disposed in the groove to prevent the micro camera 101 from colliding with the top of the housing 11 .

In this embodiment, the other end of the wristband 12 away from the housing is provided with a strap, a buckle or a Velcro.

This embodiment also proposes a CT contrast agent extravasation monitoring interruption system, as shown in Figure 1, including a CT contrast agent extravasation monitoring interruption device and a retention needle, a high-pressure connecting tube and a high-pressure syringe connected in sequence, the CT contrast agent extravasation monitoring interruption device is any of the CT contrast agent extravasation monitoring interruption devices described above, and the electric valve 3 of the CT contrast agent extravasation monitoring interruption device is sleeved on the outside of the high-pressure connecting tube.

As shown in FIG1 , the CT contrast agent extravasation monitoring interruption device further includes a second pressure sensor, which is arranged at the output end of the high-pressure injector, and is connected to the input end of the control terminal 2, and the output end of the control terminal 2 is connected to the control end of the high-pressure injector. Through the above structure, medical staff can check the injection pressure of the high-pressure injector through the control terminal 2. When the electric valve 3 is closed or the high-pressure connecting pipe is blocked, the pressure value returned by the second pressure sensor continues to increase, thereby avoiding damage to the high-pressure injector. Medical staff issue instructions through the control terminal 2 to stop the high-pressure injector.

According to the above-mentioned CT contrast agent extravasation monitoring interruption device and CT contrast agent extravasation monitoring interruption device system, this embodiment also proposes a CT contrast agent extravasation monitoring interruption device application method, including the following steps:

S1) Before the injection starts, the micro camera 101 acquires the current image, the distance sensor 104 acquires the current distance information, the first pressure sensor 105 acquires the current pressure information and sends it to the processor unit 102, the processor unit 102 respectively sends the current image, the current distance information and the current pressure information to the control terminal 2 through the data transceiver unit 103, after the control terminal 2 receives the current image, the current distance information and the current pressure information, if the current image meets the requirements, the current image is used as the original image, the current distance information is used as the original distance information, the current pressure information is used as the original pressure information and jumps to step S2), otherwise the control terminal 2 sends a motor instruction to the data transceiver unit 103, the data transceiver unit 103 sends the motor instruction to the processor unit 102, the processor unit 102 enables the motor 15 to rotate forward or reverse according to the motor instruction, and then acquires the current image, the current distance information and the current pressure information and sends them to the control terminal 2 through the data transceiver unit 103 until the current image meets the requirements;

S2) After the injection starts, the control terminal 2 sends a heating instruction to the data transceiver unit 103, and the data transceiver unit 103 sends the heating instruction to the processor unit 102. The processor unit 102 enables the relay 107 to connect the electric heater 106 and the power supply unit 108 according to the heating instruction, the micro camera 101 obtains the current image, the distance sensor 104 obtains the current distance information, the pressure sensor 105 obtains the current pressure information and sends it to the processor unit 102, and the processor unit 102 sends the current image, the current distance information and the current pressure information to the control terminal 2 through the data transceiver unit 103 respectively. The control terminal 2 receives the current image sent by the data transceiver unit 103 at intervals of 0.5 seconds, and receives the current distance information and the current pressure information sent by the data transceiver unit 103 in real time;

S3) Control terminal 2 compares the current image with the original image, the current distance information with the original distance information, and the current pressure information with the original pressure information. If the color of the current image changes relative to the same part in the original image, or swelling or enlarged pores occur, or the change value of the current distance information relative to the original distance information exceeds 0.1 to 0.5 cm, or the change value of the current pressure information relative to the original pressure information exceeds a preset first threshold, then jump to step S4), otherwise return to step S2 until the injection is completed;

S4) The control terminal 2 enables the electric valve 3 to close, and at the same time sends a stop heating instruction to the data transceiver unit 103. The data transceiver unit 103 sends the stop heating instruction to the processor unit 102. The processor unit 102 stops enabling the relay 107 according to the stop heating instruction. The control terminal 2 also obtains the pressure information sent by the second pressure sensor in real time. If the difference between the pressure information of the next time period and the pressure information of the current time period is greater than the preset second threshold value, the control terminal 2 sends a closing instruction to the high-pressure injector.

The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims (5)

1. A CT contrast agent extravasation monitoring interruption device, characterized in that it comprises a wearable device (1), a control terminal (2) and an electric valve (3), wherein the wearable device (1) is arranged in the direction of the needle tip of an indwelling needle on an arm to be monitored, and the wearable device comprises a micro camera (101), a processor unit (102), a data transceiver unit (103), a shell (11) and two wristbands (12), wherein the processor unit (102) and the data transceiver unit (103) are respectively arranged in the inner cavity of the shell (11), the micro camera (101) is arranged at the top of the shell (11), and the two sides of the shell (11) are respectively connected to a wristband (12), and the micro camera (101) faces the indwelling needle. The electric valve (3) is arranged at the liquid inlet end of the indwelling needle, the micro camera (101) is connected to the input end of the control terminal (2) through the processor unit (102) and the data transceiver unit (103), and the output end of the control terminal (2) is connected to the control end of the electric valve (3). The wearable device (1) also includes a distance sensor (104) and two support legs (13), the support legs (13) are respectively arranged at the bottom of the shell (11), the wristband (12) and the support legs (13) are in one-to-one correspondence, and each wristband (12) is respectively connected to the end of the corresponding support leg (13), and the distance sensor (104) is arranged at the bottom of the shell (11) and at the two support legs (13). The output end of the distance sensor (104) is connected to the input end of the data transceiver unit (103) through the processor unit (102); the wearable device (1) further comprises a first pressure sensor (105) and an elastic band (14) arranged between the two wristbands (12); the two ends of the elastic band (14) are respectively connected to the ends of the two support legs (13); the first pressure sensor (105) is arranged at the bottom of the elastic band (14); the output end of the first pressure sensor (105) is connected to the input end of the data transceiver unit (103) through the processor unit (102); the wearable device (1) further comprises an electric heater (106), a relay (107) and a power supply unit (108) ), the electric heating plate (106) is arranged on the top of the elastic band (14), the relay (107) and the power supply unit (108) are respectively arranged in the inner cavity of the shell (11), the power supply end of the electric heating plate (106) is connected to the power supply unit (108) through the relay (107), the output end of the processor unit (102) is connected to the control end of the relay (107), the wearable device (1) also includes a motor (15) and a boss (16) arranged at the front end of the shell (11), the motor (15) is arranged on the boss (16), the rotation axis of the motor (15) is connected to the micro camera (101), and the output end of the processor unit (102) is connected to the control end of the motor (15). 2. The CT contrast agent extravasation monitoring interruption device according to claim 1, characterized in that a groove is provided on the top of the housing (11), and the micro camera (101) is arranged in the groove. 3. The CT contrast agent extravasation monitoring interruption device according to claim 1, characterized in that the other end of the wristband (12) away from the shell is provided with a strap, a buckle or Velcro. 4. A CT contrast agent extravasation monitoring and interruption system, characterized in that it comprises a CT contrast agent extravasation monitoring and interruption device and an indwelling needle, a high-pressure connecting tube and a high-pressure injector connected in sequence, wherein the CT contrast agent extravasation monitoring and interruption device is the CT contrast agent extravasation monitoring and interruption device according to any one of claims 1 to 3, and the electric valve (3) of the CT contrast agent extravasation monitoring and interruption device is sleeved on the outside of the high-pressure connecting tube. 5. The CT contrast agent extravasation monitoring interruption system according to claim 4 is characterized in that the CT contrast agent extravasation monitoring interruption device also includes a second pressure sensor, the second pressure sensor is arranged at the output end of the high-pressure injector, the second pressure sensor is connected to the input end of the control terminal (2), and the output end of the control terminal (2) is connected to the control end of the high-pressure injector.