KR102526157B1 - apparatus and method for sensing blood leak using optical fiber - Google Patents

Abstract

The present invention relates to an apparatus and method for detecting blood leakage using an optical fiber, and more particularly, a difference between a wavelength (color) of light detected through a photodetector and a wavelength (color) of light generated through a light generator within a preset range. It relates to an apparatus and method for detecting blood leakage using an optical fiber capable of ensuring the safety of a patient by generating a danger signal by determining that blood leaked from a wound is excessive in case of deviation.

Description

Apparatus and method for sensing blood leak using optical fiber

The present invention relates to an apparatus and method for detecting blood leakage using an optical fiber, and more particularly, a difference between a wavelength (color) of light detected through a photodetector and a wavelength (color) of light generated through a light generator within a preset range. It relates to an apparatus and method for detecting blood leakage using an optical fiber capable of ensuring the safety of a patient by generating a danger signal by determining that blood leaked from a wound is excessive in case of deviation.

A well-known problem in hospital management is that bleeding from wounds can resume despite proper treatment. When bleeding resumes, the patient may lose a significant amount of blood if it is not immediately recognized by the patient or medical staff. This adversely affects the patient's recovery.

Other problems of a similar type are common in hemodialysis. In lifesaving treatment, patients with impaired or lost renal function have their blood purified from salt, urea, and other metabolic breakdown products at regular intervals of two to three times a week. In hemodialysis, an artery is punctured with a cannula or needle to make part of the dialysis machine through which the patient's blood to be purified passes.

Purified blood is returned to the patient by intravenous infusion through a cannula inserted into the vena cava. The most common arteriovenous fistula (or equivalent implant) is formed in the patient's wrist or forearm, from which blood is removed by an arterial cannula and returned downstream by an venous cannula.

A cannula of this type is attached to a wing extending from a short cylindrical plastic tube into which the cannula is mounted. These wings may be used to secure the cannula with adhesive tape to prevent longitudinal displacement within the vein, fistula, or implant. The adhesive tape may unintentionally come off and cause the cannula to dislodge. This inevitably leads to immediate bleeding, which can be quite severe. If the bleeding is not recognized and immediately stopped, the patient may lose significant amounts of blood. Dialysis patients are particularly affected by this blood loss because they are usually anemic.

Therefore, since detecting the leakage of blood from a patient's wound site, skin site where an injection needle is injected, etc. directly affects the patient's safety, a countermeasure for detecting this is required.

Republic of Korea Patent Registration No. 10-1078672 (2011.10.26.)

The present invention is a blood leak detection device using an optical fiber that can prevent a bleeding accident that has a fatal effect on life during a medical accident or prevent a patient from dying from excessive bleeding by immediately detecting and alerting a bleeding situation, and We want to provide a way.

The present invention is an optical fiber; a light generator for introducing light into one end of the optical fiber; a leakage and re-entry part formed between one end and the other end of the optical fiber so that the light passing through the optical fiber leaks and is reflected in the blood leaked from the wound and re-entered; a photodetector for detecting a wavelength by receiving the light emitted from the other end of the optical fiber; a first alarm for generating a first danger signal when a difference between the wavelength detected by the photodetector and the wavelength of light introduced into one end of the optical fiber is out of a preset range; It relates to a blood leak detection device using an optical fiber, characterized in that it comprises a.

In the present invention, the leakage and re-entry part comprises a first fracture surface connected to one end of the optical fiber and a second fracture surface disposed at a predetermined distance from the first fracture surface and connected to the other end of the optical fiber in communication. The leakage and re-entry part may include a cutout cut from a sheathing part of the optical fiber to a core of the optical fiber, wherein the leakage and re-entry part includes a blood absorbent material. It can be attached to a patch that does.

In the present invention, the material of the core of the optical fiber and the cladding of the optical fiber may each include glass, and the light introduced into one end of the optical fiber is white or blue. It may be blue-based or yellow-based light.

The present invention provides a wireless transmitter for transmitting a specific signal when the difference between the wavelength detected by the photodetector and the wavelength of light introduced into one end of the optical fiber is out of the preset range; a wireless receiver receiving the specific signal transmitted by the wireless transmitter; a second alarm for generating a second danger signal according to the specific signal received by the wireless receiver; can include

On the other hand, the present invention comprises the steps of introducing light into one end of an optical fiber in which a leakage and re-entry portion is formed between one end and the other end; detecting a wavelength by receiving the light emitted from the other end of the optical fiber; generating a danger signal when a difference between the detected wavelength and the wavelength of light introduced into one end of the optical fiber is out of a preset range; It relates to a blood leak detection method using an optical fiber, characterized in that it comprises a.

In the present invention, the leakage and re-entry part comprises a first fracture surface connected to one end of the optical fiber and a second fracture surface disposed at a predetermined distance from the first fracture surface and connected to the other end of the optical fiber in communication. The leakage and re-entry part may include a cut-out section cut from a sheathing part of the optical fiber to a core part of the optical fiber. attaching to a patch comprising an absorbent material.

According to the present invention, when the difference between the wavelength (color) of light detected through a photodetector and the wavelength (color) of light generated through a light generator exceeds a preset range, it is determined that blood leaked from the wound is excessive and a danger signal is generated. It has the advantage of ensuring patient safety.

1 is a configuration diagram of Embodiment 1;
Figure 2 is a longitudinal cross-sectional view of the leakage and re-entry part of Example 1;
3 is a longitudinal sectional view of the patch of Example 1;
4 is an exploded view of the patch of Example 1;
5 is a view of the combined state of the patch and the optical fiber of Example 1;
Fig. 6 is a longitudinal cross-sectional view of the leakage and re-entry part of Example 1;

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

Embodiment 1 relates to a blood leak detection device using an optical fiber according to the present invention.

Figure 1 is a configuration diagram of Example 1, Figure 2 is a longitudinal cross-sectional view of the leakage and re-entry portion of Example 1, Figure 3 is a longitudinal cross-sectional view of the patch of Example 1, Figure 4 is an exploded view of the patch of Example 1 5 shows a coupling state diagram of the patch and the optical fiber of Example 1.

Referring to FIG. 1, Example 1 includes an optical fiber 100, a light generator 210, a photodetector 220, and a first alarm 140.

Referring to FIG. 1, the light generator 210 is connected to one end of the optical fiber 100 or is installed near one end of the optical fiber 100. The light generator 210 is for introducing light through one end of the optical fiber 100 . Light generated from the light generator 210 and introduced to one end of the optical fiber 100 may be white, blue, or yellow light. However, this is just an example, and other types of light having a different color from blood may be used.

Referring to FIGS. 1 and 2, a leakage and re-entry portion 100-1 is formed between one end and the other end of the optical fiber 100. The leakage and re-entry part 100-1 is for re-entering the light passing through the optical fiber 100 after being leaked and reflected by blood leaking from a wound.

Referring to FIG. 2 , the leakage and re-entry portion 100-1 may include a first fracture surface 110-1 and a second fracture surface 120-1 so that blood leaked from the wound can flow in. The first fracture surface 110-1 is a fracture surface connected to one end of the optical fiber 100 in communication, and the second fracture surface 120-1 is a fracture surface connected to the other end of the optical fiber 100 in communication. The second fracture surface 120-1 is spaced apart from the first fracture surface 110-1 by a predetermined distance to form a gap. The gap is formed between the first fracture surface 110-1 and the second fracture surface 120-1 so that the blood leaked from the wound flows in and the light leaked from the first fracture surface 110-1 leaks from the wound. This is to be reflected on the blood and introduced into the second fracture surface 100-1. Therefore, the optical fiber 100 is separated into a first portion 110 from one end to the first fracture surface 110-1 and a second portion 120 from the second fracture surface 120-1 to the other end. It can be.

Referring to FIGS. 3 and 4 , the leakage and re-entry part 100-1 is attached to a patch 300. The patch 300 includes a lower flexible backing 311 , a lower absorbent layer 321 , an upper absorbent layer 322 and an upper flexible backing 312 . The lower absorbent layer 321 and the upper absorbent layer 322 are blood absorbent layers, and may be absorbent cotton gauze or cellulosic nonwoven fabric. The lower absorption layer 321 and the upper absorption layer 322 have a color different from that of blood, and may be a white color.

Referring to FIG. 4 , an exposure through hole 311-1 is formed in the central portion of the lower flexible backing 311 . A lower adhesive layer 311a is formed on the lower surface of the lower flexible backing 311, and an upper adhesive layer 311b is formed on the upper surface. A lower absorbent layer 321 is attached to the upper surface of the lower flexible backing 311, and the lower absorbent layer 321 is disposed above the exposed through hole 311-1. The exposed portion of the optical fiber 100 and the re-incident portion 100-1 are disposed on the upper surface of the lower absorption layer 321. The first part 110 and the second part 120 of the optical fiber 100 may be fixed to the upper surface of the absorption layer 321 with tape or the like to form the exposed and re-incident portions 100-1. In addition, an upper absorption layer 322 is stacked on the upper surface of the absorption layer 321 while covering the exposed and re-incident portions 100-1 of the optical fiber 100. The upper absorbent layer 322 is attached to the lower surface of the upper flexible backing 312 through the lower adhesive layer 312a. Meanwhile, the upper flexible backing 312 and the lower flexible backing 311 wrap the optical fiber 100, the lower absorption layer 321 and the upper absorption layer 322 through the lower adhesive layer 312a and the upper adhesive layer 311b and are coupled to each other. . Meanwhile, the patch 300 may be attached to a person's skin around a wound through the lower adhesive layer 311a of the lower flexible backing 311 .

Referring to FIG. 2, an optical fiber 100 includes a core portion 110a, a cladding portion 110b, and a covering portion 110c. The material of the core part 110a and the cladding part 110b is formed of glass, respectively, and the core part 110a is made of a material with a higher refractive index than the cladding part 110b. is formed The covering portion 110c may be formed of a synthetic resin material.

Referring to FIG. 1 , the photodetector 220 is connected to the other end of the optical fiber 100 or installed near the other end of the optical fiber 100 . The photodetector 220 detects the wavelength by receiving the light emitted from the other end of the optical fiber 100, and the difference between the detected wavelength and the wavelength of the light introduced to the one end of the optical fiber 100 is outside a preset range. It is a device for determining whether That is, the photodetector 220 receives the light emitted from the other end of the optical fiber 100, and compares the color of the received light and the light generated through the light generator 210 to determine the color difference within a preset range. This is to determine if it is out of the way.

Referring to FIG. 1 , a first alarm 230 is connected to the photodetector 220 . The first alarm 230 generates a first danger signal when the difference between the wavelength detected by the photodetector 220 and the wavelength of light introduced into one end of the optical fiber 100 is out of a preset range. That is, the photodetector 220 compares the wavelength (color) of the light emitted from the other end of the optical fiber 100 and the light generated through the light generator 210, and determines that the difference in wavelength (color) is outside a preset range. If determined, a signal is transmitted to the first alarm unit 230 so that the first alarm unit 230 generates a first danger signal.

Referring to FIG. 1, Embodiment 1 may further include a wireless transmitter 240. A wireless transmitter 240, a wireless receiver 410, and a second alarm 420 may be included. The wireless transmitter 240 transmits a signal to the wireless receiver 410 when the difference between the wavelength detected by the photodetector 220 and the wavelength of light introduced into one end of the optical fiber 100 is out of a preset range. . The second alarm 420 is connected to the wireless receiver 410 to generate a second danger signal according to the signal received by the wireless receiver 410 from the wireless transmitter 410 . Meanwhile, a displayer 430 may be connected to the wireless receiver 410 to display wavelengths (colors) detected by the photodetector 220 . In this case, information on the wavelength (color) detected by the photodetector 220 is transmitted through the wireless transmitter 240 and the wireless receiver 410 .

Referring to FIG. 1, a light generator 210, a light detector 220, a first alarm 230, and a wireless transmitter 240 are installed in one housing 200 near a patient to which a patch 300 is attached. can be placed Meanwhile, the wireless receiver 410, the second alarm 420, and the display 430 may be spaced apart from the housing 200 and disposed on the side of the medical staff.

Referring to FIG. 5, a first connection jack 111 and a second connection jack 121 inserted into the housing 200 may be formed in the first part 110 and the second part 120 of the optical fiber 100, respectively. . Referring to FIG. 1 , the first connection jack 111 is connected to the light generator 210 and the second connection jack 121 is connected to the photodetector 220 .

Embodiment 1 uses the fact that the size of the wavelength of light detected by the photodetector 220 is changed when the light generated through the light generator 210 is reflected on the blood leaked from the wound and re-entered. That is, in Example 1, when the difference between the wavelength (color) of light detected through the photodetector 220 and the wavelength (color) of light generated through the light generator 210 is out of a preset range, the blood leaked from the wound There is an advantage in ensuring the safety of the patient by generating a danger signal by determining that it is excessive.

Embodiment 2 relates to a blood leak detection device using another optical fiber according to the present invention.

Fig. 6 shows a longitudinal cross-sectional view of the leakage and re-entry part of Example 1;

Referring to FIG. 6, the leakage and re-entry (100-1) of Example 2 is a cutout cut from the coating portion (110c) of the optical fiber (100) to the core portion (100a) of the optical fiber (100). can The incision is to allow blood leaked from the wound to reach the core 100a. Accordingly, the cutout may be formed to go around the outer circumferential surface of the optical fiber 100 in a wedge shape.

The description of other parts is in accordance with Example 1.

Embodiment 3 relates to a blood leakage detection method using an optical fiber according to the present invention.

Embodiment 3 has a step of introducing light into one end of the optical fiber 100 in which the leakage and re-entry portion 110-1 is formed between one end and the other end. The incoming light may be the same light as that generated by the light generator 210 described in Example 1. The leakage and re-entry part 110-1 is as described in Embodiment 1 or Embodiment 2.

Embodiment 3 has a step of sensing the wavelength by receiving the light emitted from the other end of the optical fiber 100. The step of detecting the wavelength may be performed by the photodetector 220 of the first embodiment.

Embodiment 3 has a step of generating a danger signal when the difference between the detected wavelength and the wavelength of light introduced into one end of the optical fiber 100 is out of a preset range. The step of generating the danger signal may be performed by the first alarm device 230 or the second alarm device 420 of the first embodiment.

In addition, the leak and re-entry part is disposed at a predetermined distance from the first fractured surface connected to one end of the optical fiber in communication so that the blood leaked from the wound can flow in and is connected to the other end of the optical fiber in communication with the first fractured surface. including a second fracture surface that becomes

Meanwhile, Example 3 may include attaching the leakage and re-entry part 100-1 to the patch 300. The step of attaching the leakage and re-entry part 100-1 to the patch 300 is the same as described in Example 1.

100: optical fiber 100-1: leakage and re-entry part
110: first part 110a: core part
110b: cladding part 110c: covering part
110-1: first fracture surface 111: first connection jack
120: second part 120-1: second fracture surface
121: second connection jack 140: first alarm
200: housing 210: light generator
220: photodetector 230: first alarm
240: wireless transmitter 300: patch
311: lower flexible backing 311a: lower adhesive layer
311b: upper adhesive layer 311-1: exposed through hole
312: upper flexible backing 312a: lower adhesive layer
321: lower absorption layer 322: upper absorption layer
410: wireless receiver 420: second alarm
430: displayer

Claims (4)

optical fiber 100;
a light generator 210 for introducing light to one end of the optical fiber 100;
a leakage and re-entry part 100-1 formed between one end and the other end of the optical fiber 100 so that the light passing through the optical fiber 100 leaks and is reflected on the blood leaked from the wound and re-entered;
a photodetector 220 for detecting a wavelength by receiving the light emitted from the other end of the optical fiber 100;
A first alarm 230 for generating a first danger signal when the difference between the wavelength detected by the photodetector 220 and the wavelength of light introduced into one end of the optical fiber 100 is out of a preset range; include,
The leakage and re-entry portion 100-1 includes a cutout portion cut from the sheath portion of the optical fiber 100 to the core portion of the optical fiber 100. Blood leak detection device.
delete According to claim 1,
The leak and re-injection part 100-1 is a blood leak detection device using an optical fiber, characterized in that attached to a patch containing a blood absorbent.
introducing light into one end of the optical fiber 100 in which the leakage and re-entry part 100-1 is formed between one end and the other end;
detecting a wavelength by receiving light emitted from the other end of the optical fiber 100;
Generating a danger signal when the difference between the detected wavelength and the wavelength of light introduced into one end of the optical fiber 100 is out of a preset range.
The leakage and re-entry portion 100-1 includes a cutout portion cut from the sheath portion of the optical fiber 100 to the core portion of the optical fiber 100. Blood leak detection method.

Images