KR102448604B1 - Apparatus for detecting and monitoring extrevasation - Google Patents

Abstract

The present invention is attached to the skin band comprising a hole for exposing the skin; a plurality of strain gauges disposed in the band and arranged in a plurality of rows and columns around the hole; a sensing unit disposed on the band; and a detection unit connected to the strain gauge, wherein the sensing unit includes a light emitting unit disposed on one side of the hole and a light receiving unit disposed on the other side of the hole to receive the light from the light emitting unit, In a state in which the band is bent, the light emitting unit and the light receiving unit are arranged to face each other so that the hole is located on the optical path, the sensing unit measures a first height of the skin protruding through the hole, and the detection unit Based on the measured value of the strain gauge and the first height measured by the sensing unit, it is possible to provide an extravascular leakage detection and monitoring device that detects the leakage amount of the vascular injection.

Description

Extravasation detection and monitoring device

The present invention provides an extravascular injection capable of accurately and quickly monitoring the leakage of a vascular injection agent such as a contrast agent or fluid to the outside of the blood vessel in real time and detecting the leakage amount of the vascular injection agent, thereby accurately and quickly monitoring the skin deformation caused by the leakage of the vascular injection agent. It is about leak detection and monitoring.

In general, when extravasation occurs during a process of injecting a contrast fluid media through a catheter into a blood vessel, the contrast agent is injected into the tissue surrounding the blood vessel instead of entering the blood vessel. When the contrast agent leaks out of the blood vessel, the fascia and tissues are infiltrated, resulting in a complex syndrome, which has a fatal effect on the patient and the subject.

If extravasation is found, CT examination should be discontinued immediately. In general, since there is no separate device for detecting extravasation, it is inevitably dependent on the subject's awareness. In other words, a method is used in which the subject feels abnormality or pain and presses a switch to notify the possibility of extravasation. This is very inaccurate as it depends on the subject's feeling, and even though the extravasation has occurred, if the examinee is not aware of it or is not informed of it through subjective feeling, complications related to the extravasation may occur and the skin tissue may be necrotic. There is this.

In addition, even if the examinee informs the possibility of extravasation, there is a problem in that only the examination can be stopped, and it is not possible to know at which location and to what extent the contrast medium is leaked.

Republic of Korea Patent Publication No. 10-2001-0032477 (published on 25th April 2001)

An object of the present invention is to provide an extravascular leak detection and monitoring device capable of accurately and rapidly monitoring in real time whether or not the skin is deformed due to leakage of a vascular injection, and capable of detecting the location and amount of leakage of the vascular injection. do.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the following description.

The present invention, in order to solve the above problems, a band attached to the skin and including a hole for exposing the skin, is disposed in the band, around the hole, a plurality of rows and columns arranged in a plurality of rows and columns a strain gauge, a sensing unit disposed in the band, and a detection unit connected to the strain gauge, wherein the sensing unit includes a light emitting unit disposed at one side of the hole and a light receiving unit disposed at the other side of the hole to receive light from the light emitting unit Including, in a state in which the band is bent, the light emitting unit and the light receiving unit are arranged to face each other so that the hole is located on the optical path, and the sensing unit measures a first height of the skin protruding through the hole, The detection unit may provide an extravascular leakage detection and monitoring device that detects the leakage amount of the vascular injection based on the measured value of the strain gauge and the first height measured by the sensing unit.

Preferably, the first height may be a difference in height between the uppermost end of the hole and the uppermost end of the skin protruding from the hole when the band is worn.

Preferably, the light emitting part includes a first support part and a light emitting element disposed on the first support part, and the light receiving part includes a second support part and a light receiving element disposed on the second support part, and the strain gauge is It is disposed in the central portion of the band, the first support portion is connected to one end of the band, the second support portion is connected to the other end of the band, interlocking with the bending of the band, the light emitting device and the light receiving The position of the first support part and the position of the second support part may be changed in a direction away from the band so that the devices face each other.

Preferably, the detection unit includes a storage unit stored in advance in the form of a lookup table in the form of a look-up table for the leakage amount of the vascular injection corresponding to the value of the strain gauge and the height of the skin protruding through the hole, and the measured value of the strain gauge in the storage unit and the leakage amount of the vascular injection corresponding to the first height may be detected.

Preferably, the detection unit detects the strain gauge in which the measured value of the strain gauge is greater than or equal to a reference value among the plurality of strain gauges, and transmits the detected position information of rows and columns of the strain gauge to the display device.

Preferably, it may include an infrared camera disposed on the band and connected to the detection unit to acquire image information of the subject's skin area exposed through the hole and transmit the image information to the display device.

Preferably, the infrared camera is disposed in the center of the band, and the infrared camera is disposed at one end of the band, interlocking with the bending of the band, so that the hole enters the field of view of the infrared camera. The position of the infrared camera may be changed in a direction away from .

Preferably, the detection unit may transmit a warning signal to the display device when the detected leakage amount of the vascular injection exceeds a reference value.

The embodiment has the advantage of being able to accurately and quickly monitor in real time whether the skin is deformed due to the leakage of the vascular injection.

The embodiment has the advantage of being able to detect a leaked position of the contrast agent in real time.

The embodiment has an advantage in that the leakage amount of the contrast agent can be detected in real time.

The embodiment has the advantage that the injection of the vascular injection can be checked in real time through the infrared camera, and the flow of the injected vascular injection can be checked in real time.

1 is a view showing a state in which an extravascular leakage detection and monitoring device according to an embodiment is worn on an arm of a subject;
Figure 2 is a view showing the extravasation detection and monitoring device shown in Figure 1;
3 is a view showing the positions of the sensing unit and the infrared camera when the band is worn;
4 is a view showing a process of measuring the first height of the swollen skin through the sensing unit;
5 is a view showing a process of detecting a leak location of a vascular injection through a strain gauge;
6 is a flowchart illustrating a process of detecting a leak amount and a leak location of a vascular injection using the extravascular leak detection and monitoring device according to the embodiment, and obtaining infrared image information;
7 is a diagram illustrating a process in which a subject presses a squeeze button to transmit a detection signal;
8 is a flowchart illustrating a process in which the examiner determines whether to continue the injection of the vascular injection.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings and preferred embodiments. And the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor appropriately defines the concept of the term in order to explain his invention in the best way. Based on the principle that can be done, it should be interpreted as meaning and concept consistent with the technical idea of the present invention. And in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention will be omitted.

Hereinafter, in describing the apparatus for detecting and monitoring extravasation according to an embodiment, when it is described as being formed or disposed on “upper (upper) or lower (lower)” of each component, upper (upper) or lower ( Below) includes not only the case where two components are in direct contact with each other, but also a case where one or more other components are formed or disposed between the two components. In addition, when expressed as “up (up) or down (down)”, the meaning of not only the upward direction but also the downward direction based on one component may be included.

In addition, terms such as first and second may be used, and these terms are only for distinguishing the component from other components, and are not limited to the essence, order, or order of the component by the term. .

1 is a view showing a state in which the apparatus for detecting and monitoring extravasation according to an embodiment is worn on the arm of a subject. FIG. 2 is a diagram illustrating the apparatus for detecting and monitoring extravasation shown in FIG. 1 . The vascular injection agent to be described below may be a contrast agent for CT examination.

1 and 2 , the apparatus for detecting and monitoring extravasation according to the embodiment is attached to an arm of a subject. Specifically, the extravasation detection and monitoring device may be attached to the forearm 1 between the wrist and elbow of a subject into which a vascular injection (eg, contrast agent) is injected. Hereinafter, the device for detecting and monitoring extravasation operates when the subject presses the squeeze button (2 in FIG. 7) or when the subject starts to inject the vascular injection, even if the subject does not press the switch. It is a device that provides real-time information on the location of the outflow, the amount of leakage of the vascular injection, and infrared image information of the injection area of the vascular injection to the examiner.

Such. The extravasation detection and monitoring apparatus may include a band 100 , a plurality of strain gauges 200 , a sensing unit 300 , and a detection unit 500 . The detector 500 may be disposed inside the band 100 or separately provided outside the band 100 .

The band 100 is a band-shaped member, and is fixed in close contact with the forearm (1). The band 100 may be made of a stretchable material such as medical silicone. The band 100 may be divided into a central portion 110 , one end portion 120 , and the other end portion 130 . When the test subject wears the band 100 on the forearm 1, the central part 110 is located in the skin region where the catheter into which the vascular injection is injected is mounted, and the one end 120 and the other end 130 are the forearm ( 1) is covered. The first coupling part 140 may be disposed at the end of the one side end 120 , and the second coupling part 150 may be disposed at the other end 130 . The first coupling part 140 and the second coupling part 150 may be detachably coupled to each other. The first coupling part 140 and the second coupling part 150 may be provided with coupling means such as Velcro and a button, respectively.

The band 100 may include a hole 101 in the central portion 110 . The skin region into which the vascular injection is injected is exposed through the hole 101 .

The plurality of strain gauges 200 may be disposed on the band 100 . The plurality of strain gauges 200 may be arranged in a matrix form to form rows and columns. The plurality of strain gauges 200 may be disposed along the circumference of the hole 101 with the hole 101 in the center. This is because the vascular injection is injected into the skin area located inside the hole 101, and if extravascular leakage occurs, the skin in the area around the hole 101, including the hole 101, swells, resulting in large skin deformation. In order to effectively detect such skin deformation, strain gauges 200 are disposed to surround the hole 101 .

When extravascular leakage occurs and the skin swells, the resistance included in the strain gauge 200 is changed in response to this, and the changed resistance value is used as a measurement value to detect how much the skin has swelled. It can be used as information.

The sensing unit 300 is a device for measuring the height at which the skin has been deformed due to extravasation. If the strain gauge 200 is a device for measuring the degree of skin strain along the x-axis and the y-axis, the sensing unit 300 is a device for measuring the degree of skin strain along the z-axis in general. Accordingly, the degree of skin deformation can be detected more three-dimensionally through the strain gauge 200 and the sensing unit 300 .

The sensing unit 300 may include a light emitting unit 310 and a light receiving unit 320 . The light emitting part 310 may be disposed on one side of the hole 101 , and the light receiving part 320 may be disposed on the other side of the hole 101 . The optical signal transmitted from the light emitting unit 310 is received by the light receiving unit 320 . When there is an object on the optical path from the light emitting unit 310 to the light receiving unit 320 , the amount of light received by the light receiving unit 320 is changed, and the voltage is changed accordingly. Based on the voltage difference, the position and size of the object may be sensed.

The light emitting unit 310 may include a first supporting unit 311 and a light emitting device 312 . The first support portion 311 is a band-shaped member, and a part thereof may be coupled to one end portion 120 of the band 100 . Another part of the first support part 311 is not coupled to the band 100 and is disposed to be spaced apart, and the light emitting device 312 may be disposed.

The light receiving unit 320 may include a second supporting unit 321 and a light receiving element 322 . The second support part 321 is a band-shaped member, and a part thereof may be coupled to the other end 130 of the band 100 . The other part of the second support part 321 is not coupled to the band 100 and is disposed to be spaced apart, and the light receiving element 322 may be disposed.

A first core 313 may be embedded in the first support part 311 . The first core 313 may be made of a metal material that is flexible to be deformable by an external force and can secure a certain strength.

A second core 323 may be embedded in the second support 321 . The second core 323 may also be made of a metal material that is flexible to be deformable by an external force and can secure a certain strength.

The first core 313 and the second core 323 are aligned with the light emitting element 312 and the light receiving element 322 when the band 100 is bent and the light emitting unit 310 and the light receiving unit 320 are erected. This is to adjust the positions of the light emitting unit 310 and the light receiving unit 320 as much as possible.

The infrared camera 400 may be disposed on the band 100 . The infrared camera 400 serves to acquire infrared image information for confirming the flow of the vascular injection in the skin region corresponding to the periphery of the hole 101 and transmit it to the display device (600 in FIG. 4 ). A portion of the infrared camera 400 may be coupled to one end 120 or the other end 130 of the band 100 . Another area of the infrared camera 400 is disposed to be spaced apart from the band 100 , which is for standing the infrared camera 400 when the band 100 is bent.

The detection unit 500 may be disposed inside the band 100 or outside the band 100 , and may be connected to the strain gauge 200 and the sensing unit 300 . The detection unit 500 detects the leakage amount of the vascular injection based on the measured value of the strengage and the first height (H in FIG. 4 ) sensed by the sensing unit 300 . Also, the detection unit 500 may detect location information at which the vascular injection is leaked based on the measured value of the strain gauge 200 .

3 is a diagram illustrating positions of the sensing unit 300 and the infrared camera 400 when the band 100 is worn.

Referring to FIG. 3 , when the band 100 is worn, when the skin region into which the vascular injection is injected is the front of the forearm 1 , the hole 101 and the strain disposed in the central part 110 of the band 100 . The gauge 200 is positioned on the front of the forearm 1 , and the one end 120 and the other end 130 of the band 100 are bent and positioned on the side and back of the forearm 1 .

When the band 100 is worn, one end 120 and the other end 130 of the band 100 are bent, and the light emitting unit 310 stands in a direction away from the band 100. The light receiving unit 320 and the light receiving unit 320 are also arranged to stand up in a direction away from the band 100 .

When the wearing of the band 100 is completed, the light emitting device 312 and the light receiving device 322 are disposed to face each other with the hole 101 interposed therebetween. The uppermost end T2 of the hole 101 is positioned on the optical path (O1 of FIG. 4 ) of the light emitting element 312 and the light receiving element 322 . Accordingly, the sensing unit 300 may sense the position of the uppermost end T2 of the hole 101 .

When the band 100 is worn, one end 120 and the other end 130 of the band 100 are bent, and the infrared camera 400 is a band such that the hole 101 enters the field of view of the infrared camera 400 . It may be arranged to stand up in a direction away from (100).

4 is a view illustrating a process of measuring the first height (H) of the swollen skin through the sensing unit 300, and FIG. 6 is a flowchart illustrating a process of detecting the leakage amount and location of the vascular injection using the extravascular leakage detection and monitoring apparatus according to the embodiment, and obtaining infrared image information.

4 and 6 , when extravasation occurs and the skin swells, the skin protrudes through the hole 101 . The position of the uppermost end T1 of the protruding skin may be detected through the sensing unit 300 . The uppermost end T1 of the skin protruding on the optical path of the light emitting element 312 and the light receiving element 322 (O2 in FIG. 4 ) is located.

The sensing unit 300 may detect a first height H, which is a height difference between the detected uppermost end T2 of the hole 101 and the uppermost T1 of the protruding skin, and transmit it to the detecting unit 500 . The first height H may change in real time as extravasation proceeds, and the sensing unit 300 may measure the real-time changing first height H and transmit it to the detection unit 500 . In addition, the strain gauge 200 may transmit the strain gauge measurement value, which is changed as the skin swells, to the detection unit 500 in real time.

On the other hand, the detection unit 500 may include a storage unit pre-stored in the form of a lookup table for the amount of leakage of the vascular injection corresponding to the strain gauge value and the height of the skin protruding through the hole 101 . When extravascular leakage occurs, the detection unit 500 receives the measurement value from the strain gauge 200 , and receives the first height H from the sensing unit 300 , and the corresponding vascular injection leakage amount from the storage unit. can be detected by matching

On the other hand, the strain gauge 200 can acquire information on the degree of skin deformation on the x-axis and y-axis, as well as the strain gauges 200 are arranged in a plurality of rows and columns, so that the z-axis component of the skin deformation is Information can also be obtained. Information on the z-axis component of the skin deformation by the strain gauge can also be utilized to detect the vascular injection leakage amount together with the first height (H). For example, along with the x-axis displacement, the y-axis displacement, and the z-axis displacement of the strain gauge 200, the volume of the leaked vascular injection may be calculated using the first height H.

The detection unit 500 may transmit a warning signal to the display apparatus 600 when the detected leakage amount of the vascular injection exceeds a reference value.

Meanwhile, as shown in FIG. 5 , indices (eg, numbers 1 to 32) may be indicated to spatially distinguish the plurality of strain gauges 200 . The detector 500 may detect the strain gauge 200 in which the measured value of the strain gauge 200 is greater than or equal to a reference value among the plurality of strain gauges 200 . In addition, the detection unit 500 may transmit the detected position information (index, for example, 9, 10, 11, 15, 19 in the drawing) of rows and columns of the strain gauge 200 to the display device 600 . The examiner can visually check the position information of the detected strain gage rows and columns to detect in real time which skin region of the subject the vascular injection agent has leaked.

Meanwhile, the infrared camera 400 may transmit image information around the hole 101 to the display device in real time from the time the vascular injection is injected. The examiner can check the injection process of the vascular injection in real time through the image information, and can visually confirm the flow of the vascular injection in the skin region around the hole 101 .

7 is a diagram illustrating a process in which an examinee transmits a detection signal by pressing a squeeze button.

Referring to FIG. 7 , during injection of the vascular injection, if the examinee subjectively feels the leakage of the vascular injection, for example, stiff pain, the examiner can be informed of this by directly pressing the squeeze button 2 held in the hand. have. When the examinee presses the squeeze button 2 , the button signal is transmitted to the display device 600 so that the examinee can recognize it.

8 is a flowchart illustrating a process in which the examiner determines whether to continue the injection of the vascular injection.

Referring to FIG. 8 , during injection of the vascular injection, a detection signal of a subject, a signal of a strain gauge or a sensing unit, and an infrared image may be transmitted to a control device including the display device 600 ( S100 ) Detection signal of the subject , a signal of a strain gauge or a sensing unit, and an infrared image may be analyzed through a preset manual. (S200) Analysis may be performed manually by an examiner or automatically through an analysis tool. According to the analysis, it is determined whether the vascular injection is leaking. (S300) If it is determined that the vascular injection is not leaking, the examiner may continue to inject the vascular injection. If it is determined that the vascular injection is leaking, the examiner may manually stop the injection of the vascular injection or the device may automatically stop the injection of the vascular injection. For example, it is determined that the vascular injection is leaking based on at least one of a detection signal of the subject, a signal from a strain gauge or a sensing unit, and an infrared image, and the injection of the vascular injection may be stopped.

As described above, the apparatus for detecting and monitoring extravascular leakage according to a preferred embodiment of the present invention has been described in detail with reference to the accompanying drawings.

One embodiment of the present invention described above is to be understood in all respects as illustrative and not restrictive, and the scope of the present invention will be indicated by the following claims rather than the foregoing detailed description. And it should be construed that all changes or modifications derived from the meaning and scope of the claims as well as equivalent concepts are included in the scope of the present invention.

100: band
101: Hall
110: central part
120: one end
130: the other end
200: strain gauge
300: sensing unit
310: light emitting unit
320: light receiving unit
400: infrared camera
500: detection unit
600: display device

Claims (8)

a band attached to the skin and including a hole exposing the skin;
a plurality of strain gauges disposed in the band and arranged in a plurality of rows and columns around the hole;
a sensing unit disposed on the band; and
It includes a detection unit connected to the strain gauge,
The sensing unit includes a light emitting unit disposed on one side of the hole and a light receiving unit disposed on the other side of the hole to receive the light from the light emitting unit,
In a state in which the band is bent, the light emitting unit and the light receiving unit are arranged to face each other so that the hole is located on the optical path, and the sensing unit measures a first height of the skin protruding through the hole,
The detection unit is an extravascular leakage detection and monitoring device for detecting the leakage amount of the vascular injection based on the measured value of the strain gauge and the first height measured by the sensing unit. The method of claim 1,
The first height is a height difference between the uppermost end of the hole and the uppermost end of the skin protruding from the hole when the band is worn. 3. The method of claim 2,
The light emitting unit includes a first support and a light emitting device disposed on the first support,
The light receiving unit includes a second supporting unit and a light receiving element disposed in the second supporting unit,
The strain gauge is disposed in the central portion of the band, the first support portion is connected to one end of the band, the second support portion is connected to the other end of the band,
In association with the bending of the band, the position of the first support part and the position of the second support part are changed in a direction away from the band so that the light emitting element and the light receiving element face each other. 4. The method of claim 3,
The detection unit includes a storage unit in advance in the form of a lookup table for the amount of vascular injection leakage corresponding to the value of the strain gauge and the height of the skin protruding through the hole, and the measured value of the strain gauge and the first height in the storage unit An extravascular leakage detection and monitoring device that detects the leakage amount of the vascular injection corresponding to the 4. The method of claim 3,
The detection unit detects the strain gauge in which the measured value of the strain gauge is greater than or equal to a reference value among a plurality of strain gauges, and transmits the detected position information of the row and column of the strain gauge to a display device Extravascular leakage detection and monitoring device . The method of claim 1,
and an infrared camera disposed on the band and connected to the detection unit to acquire image information of the subject's skin region exposed through the hole and transmit the image information to a display device. 7. The method of claim 6,
The infrared camera is disposed in the center of the band, and the infrared camera is disposed at one end of the band, interlocking with the bending of the band, in a direction away from the band so that the hole enters the field of view of the infrared camera. An extravascular leakage detection and monitoring device in which the position of the infrared camera is changed. 4. The method of claim 3,
The detection unit is an extravascular leakage detection and monitoring device that transmits a warning signal to the display device when the detected leakage amount of the vascular injection exceeds a reference value.

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