Intravenous drip detection device

Abstract

To provide a drip detection device for detecting dripping of liquid medicine dripping in a drip tube, which can secure visibility of dripping of drip infusion in multiple directions.SOLUTION: A drip detection device includes an attaching part, a sensor, and an extension part. The attaching part is configured so as to be attached to a drip tube. The sensor is configured so as to detect dripping. The extension part is configured so as to hold the sensor at a position extending in a longitudinal direction of the drip tube with respect to the attaching part. The proportion covered with the extension part in a circumferential direction of the drip tube is less than 50% of the entire circumference of the drip tube.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an infusion detection device that detects the dripping of a chemical solution falling inside an infusion set.

Background Art

[0002] Conventionally, medical staff often visually check the dripping of the chemical solution in the infusion set, and it has been time-consuming because the medical staff themselves need to measure the dripping speed. Also, there were cases where the medical staff did not notice the timing of the end of the infusion or the replacement of the chemical solution. Therefore, a measuring device (infusion detection device) that notifies the dripping speed, abnormal dripping, or the end of the infusion has been proposed.

[0003] For example, Patent Document 1 discloses a measuring device having a housing with a fitting recess into which a side wall of an infusion set is detachably fitted, a positioning abutting portion that abuts against the lower surface of the flange portion of the infusion set, an infusion liquid detector that detects the infusion liquid, and an information output device that outputs infusion information. This measuring device is attached to the infusion set by the fitting recess and the positioning abutting portion.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, conventional infusion detection devices have a structure in which a sensor or the main body of the measuring device is attached to the dripping portion where the chemical solution drips. As a result, the visibility of the dripping portion is reduced, and it was impossible to confirm the dripping visually unless it was from a specific direction. In actual clinical settings, one medical staff may manage multiple patients undergoing infusion trials, or conversely, multiple medical staff may manage the same infusion patient. In such cases, while the infusion detection device is responsible for detecting the dripping of the infusion, it is necessary for the medical staff to be able to confirm the dripping visually from multiple directions.

[0006] This invention has been made in view of these circumstances, and provides an intravenous drip detection device that can detect the dripping of a drug solution falling inside a drip chamber and ensure visibility of the dripping from multiple directions. [Means for solving the problem]

[0007] The present invention provides the following: (1) An intravenous drip detection device comprising a mounting portion, a sensor, and an extension portion, wherein the mounting portion is configured to be attachable to an intravenous drip chamber, the sensor is configured to be able to detect an intravenous drip, and the extension portion is configured to hold the sensor in a position extending in the longitudinal direction of the intravenous drip chamber relative to the mounting portion, and the proportion of the intravenous drip chamber covered by the extension portion in the circumferential direction is less than 50% of the entire circumference of the intravenous drip chamber.

[0008] (2) An intravenous drip detection device according to (1), wherein the width of the extension portion corresponding to the circumferential direction of the drip tube is shorter than the length of the extension portion in the longitudinal direction.

[0009] (3) An intravenous drip detection device according to (1) or (2), wherein the mounting portion comprises a first clamping member and a second clamping member, the sensor comprises a light-emitting portion and a light-receiving portion, and comprises two extensions, a first extension portion provided on the first clamping member and a second extension portion provided on the second clamping member, and comprises a biasing member that biases the first clamping member and the second clamping member so that the first clamping member and the second clamping member clamp the intravenous drip chamber, and one of the first extension portion and the second extension portion holds the light-emitting portion and the other holds the light-receiving portion.

[0010] (4)(3) The drip detection device according to (3), wherein the first clamping member and the second clamping member are each formed in the shape of a thin plate with the longitudinal direction being the thickness direction, the second clamping member has a housing portion into which the first clamping member can be inserted in the direction of clamping the drip chamber, the first clamping member has a first clamping groove formed by cutting out a side surface in the longitudinal direction that is different from the sliding direction in which the second clamping member slides and the longitudinal direction, the second clamping member has a second clamping groove formed by cutting out a side surface in the longitudinal direction that is the same direction as the side surface of the first clamping member, the drip chamber is clamped by a first clamping portion in the first clamping groove in the insertion direction of the first clamping member and a second clamping portion in the second clamping groove in the removal direction of the first clamping member, and the biasing member is provided between the outer surface of the first clamping member in the insertion direction and the bottom surface of the housing portion.

[0011] (5)(4) The drip detection device according to (4), wherein the first clamping member and the second clamping member clamp the drip chamber, and the end of the first clamping member in the extraction direction protrudes from the second clamping member.

[0012] According to the present invention, the extension portion holds the sensor in a position that extends longitudinally from the mounting portion of the drip chamber, and the proportion of the drip chamber covered by the extension portion in the circumferential direction is configured to be less than 50% of the entire circumference of the drip chamber. This makes it possible to detect the dripping of liquid medicine falling inside the drip chamber and to ensure visibility of the dripping from multiple directions. [Brief explanation of the drawing]

[0013] [Figure 1] This is an external perspective view showing the drip detection device 100 according to an embodiment of the present invention attached to the drip chamber 200. [Figure 2] This diagram clearly shows the drip portion X of a typical drip chamber 200. [Figure 3] This is an exploded perspective view of the intravenous drip detection device 100 according to an embodiment of the present invention. [Figure 4]This is a front view showing the drip detection device 100 according to an embodiment of the present invention attached to the drip chamber 200. [Figure 5] This is a right side view showing the drip detection device 100 according to an embodiment of the present invention attached to the drip chamber 200. [Figure 6] Figures 6A and 6B are plan cross-sectional views along the cross-sectional line AA in Figure 4, showing the drip detection device 100 according to an embodiment of the present invention before it is attached to the drip chamber 200. [Figure 7] This is a plan cross-sectional view along the cross-sectional line AA in Figure 4, showing the drip detection device 100 according to an embodiment of the present invention attached to the drip chamber 200. [Figure 8] Figure 8A is a plan view of the infusion detection device 100 according to the second embodiment, and Figure 8B is a plan view of the infusion detection device 100 according to the third embodiment. [Figure 9] Figures 9A and 9B are plan views of the infusion detection device 100 according to the fourth embodiment of the present invention. [Modes for carrying out the invention]

[0014] Embodiments of the present invention will be described in detail below with reference to the drawings. In this specification, the orientation in Figure 4 is considered the front view, the left-right direction in the same figure is considered the left-right direction (sliding direction), and the longitudinal direction of the drip chamber 200 is considered the up-down direction.

[0015] 1. First Embodiment 1.1 Overall configuration of the infusion detection device 100 Figure 1 is an external perspective view showing the infusion detection device 100 according to this embodiment attached to the drip chamber 200. The infusion detection device 100 comprises an attachment part 1 for attachment to the drip chamber 200, a sensor 2 for detecting infusion, and an extension part 3 for holding the sensor 2. The attachment part 1 and the extension part 3 are made of, for example, resin.

[0016] In addition, the term "dripping part" used in this specification means the part in the drip chamber 200 where the liquid droplets 202b of the chemical solution 202 drip from the conduit 201, as shown in FIG. 2. More specifically, it is the portion marked with symbol X between the lower end 201a and the liquid surface 202a.

[0017] 1.1.1 Structure of the mounting part 1 As shown in FIG. 3, the mounting part 1 includes a first clamping member 10, a second clamping member 11, and a spring 12 as a biasing member. Both the first clamping member 10 and the second clamping member 11 have a rectangular parallelepiped shape (a thin plate shape with the vertical direction being the thickness direction). The first clamping member 10 shows an example of being hollow in FIGS. 6A to 7, but it may be solid. However, by making it hollow, it becomes possible to pass the wiring for electrically connecting the light emitting part 20 and the circuit board 5 inside the first clamping member 10. The second clamping member 11 has dimensions larger than those of the first clamping member 10 and is formed hollow, and includes a left wall portion 11d, an upper wall portion 11e, a lower wall portion 11f, a front wall portion 11g, and a rear wall portion 11h. And the second clamping member 11 has a housing portion 11c that houses the first clamping member 10 by being surrounded by these wall portions. In the present embodiment, the housing portion 11c opens toward the right, and is configured such that the first clamping member 10 can be inserted from the right side in the leftward direction (insertion direction). The front wall portion 11g of the second clamping member 11 is provided with an LED 6.

[0018] In addition, the first clamping member 10 has a U-shaped first clamping groove 10a whose front side surface is cut out over the entire vertical direction, and the left side surface in the first clamping groove 10a is the first clamping part 10b. Also, the second clamping member 11 has a U-shaped second clamping groove 11a where the front sides of the upper wall portion 11e and the lower wall portion 11f are cut out, and the right edge in the second clamping groove 11a is the second clamping part 11b. The mounting part 1 can clamp the drip chamber 200 by the first clamping part 10b of the first clamping member 10 and the second clamping part 11b of the second clamping member 11.

[0019] Furthermore, referring to Figure 6, two springs 12 are provided between the left outer surface 10c of the first clamping member 10 and the inner surface of the left wall portion 11d of the second clamping member 11. As shown in Figure 6A, when the drip chamber 200 is not clamped and no force is applied to the springs 12, the springs 12 exert a force from left to right (removal direction), causing the right side surface 10d of the first clamping member 10 to protrude significantly from the second clamping member 11, and narrowing the space between the first clamping portion 10b and the second clamping portion 11b.

[0020] Next, when the protruding right side surface 10d of the first clamping member 10 is pushed in the insertion direction, the spring 12 is pushed in by the first clamping member 10, and the space between the first clamping portion 10b and the second clamping portion 11b widens (see Figure 6B). The spring 12 has a biasing force that pushes the first clamping member 10 out of the second clamping member 11, thereby allowing the drip chamber 200 to be clamped between the first clamping portion 10b and the second clamping portion 11b (Figure 7). Preferably, even when the drip chamber 200 is clamped, the right side surface 10d of the first clamping member 10 is configured to protrude from the second clamping member 11.

[0021] Although two springs 12 are depicted in the drawings accompanying this specification, there are not necessarily two, and there can be at least one spring 12. In other embodiments, an elastic material such as silicone may be provided on the contact surfaces of each clamping portion 10b, 11b with the drip chamber 200 to prevent it from coming off (not shown).

[0022] 1.1.2 Configuration of extension section 3 The drip detection device 100 of this embodiment includes two extensions 3, as shown in Figure 3: a first extension 30 provided on the first clamping member 10 and a second extension 31 provided on the second clamping member 11. The first extension 30 holds the light-emitting part 20 of the sensor 2, and the second extension 31 holds the light-receiving part 21 of the sensor 2. Referring to Figure 4, the first extension 30 is configured to extend upward from the upper surface of the first clamping member 10. The second extension 31 is configured to extend upward from the upper surface of the upper wall portion 11e of the second clamping member 11. In this embodiment, each extension 30, 31 is formed individually and fixed to the mounting portion 1 by adhesive, welding, or fitting. However, the extension 31 may be formed integrally with the corresponding mounting portion 1.

[0023] As shown in Figure 4, the first extension 30 and the second extension 31 are positioned on a straight line in the left-right direction, facing the centerline of the drip chamber 200. The first opposing surface 30a of the first extension 30 and the second opposing surface 31a of the second extension 31 point to the surface facing the drip chamber 200 and are opposite to each other. Furthermore, the first opposing surface 30a of the first extension 30 is configured to extend upward from the clamping surface of the first clamping portion 10b. The second opposing surface 31a of the second extension 31 is configured to extend upward from the clamping surface of the second clamping portion 11b. In other words, each opposing surface 30a, 31a is perpendicular to the mounting portion 1 in the front view shown in Figure 4. Therefore, each opposing surface 30a, 31a is located in the same left-right position as the clamping surfaces of the clamping portions 10b, 11b, respectively. This allows the sensor 2 held by the extension 3 to be positioned close to the drip chamber 200.

[0024] Preferably, the height of the extension portion 3 is configured to be equal to the height of the sensor 2 (light-emitting portion 20 and light-receiving portion 21). In this embodiment, since the upper surface of the upper wall portion 11e of the second clamping member 11 is above the upper surface of the first clamping member 10, the first extension portion 30 is configured to have a vertically longer dimension than the second extension portion 31.

[0025] As shown in Figure 5, the shape of the extension portion 3 is configured to be rod-shaped such that the width W of each extension portion 30, 31 corresponding to the circumferential direction of the drip chamber 200 is shorter than its vertical length H. In the illustrated embodiment, the ratio of the width W to the vertical length H of each extension portion 30, 31 (W / H) is 2 / 17. In order to make each extension portion 30, 31 into an elongated rod shape, this ratio (W / H) is preferably 1 / 4 or less, more preferably 1 / 6 or less, and even more preferably 1 / 8 or less. Furthermore, this ratio (W / H) may be, for example, 1 / 20, 1 / 15, 1 / 12, 1 / 10, 1 / 8, 1 / 6, 1 / 1 / 4, 1 / 3, 1 / 2, 2 / 3, 3 / 4, and may be within the range of any two of the values ​​exemplified here.

[0026] In the illustrated embodiment, the extension portion 3 has a trapezoidal shape when viewed from the front, as the area of ​​the bottom surface that contacts the mounting portion 1 and the area of ​​the top surface that holds the sensor 2 are different (see Figure 4). This is to increase strength by increasing the bottom area that contacts the mounting portion 1. Therefore, the term "rod-shaped" as used herein also includes shapes in which the bottom area and top area are not equal. In addition, although the cross-sections of each extension portion 30, 31 are rectangular in this embodiment, other shapes (for example, circular or triangular) may also be used.

[0027] Furthermore, in this embodiment, the percentage of the circumferential direction of the drip chamber 200 covered by the first extension 30 and the second extension 31 is less than 5% each. In other words, the percentage of the circumferential direction of the drip chamber 200 covered by the two extensions 3 together is less than 10%. However, in order to ensure the strength of the first extension 30 and the second extension 31, it is preferable that the percentage of the circumferential direction of the drip chamber 200 covered by the first extension 30 and the second extension 31 each be 2% or more.

[0028] 1.1.3 Configuration of Sensor 2 Sensor 2 consists of a light-emitting unit 20 and a light-receiving unit 21. In this embodiment, the light-emitting unit 20 is located on the first extension 30, and the light-receiving unit 21 is located on the second extension 31. Thus, similar to the arrangement of the extension 3, they are arranged on a straight line in the left-right direction, opposite the centerline of the drip chamber 200. Sensor 2 can detect the presence or absence of a droplet 202b dripping from the dripping section X by receiving light emitted from the light-emitting unit 20 with the light-receiving unit 21. Since such a sensor 2 can be manufactured using known technology, a detailed explanation is omitted. Alternatively, the light-receiving unit 21 may be located on the first extension 30 and the light-emitting unit 20 on the second extension 31. With this arrangement of the light-emitting unit 20 and the light-receiving unit 21, when the drip chamber 200 is clamped, the configuration clamps the dripping section X, in other words, the configuration clamps the dripping trajectory of the infusion, and the dripping of the drug solution 202 (droplet 202b) can be detected.

[0029] 1.1.4 Configuration of Switch 4 A switch 4 is provided between two springs 12 positioned between the left outer surface 10c of the first clamping member 10 and the inner surface of the left wall portion 11d of the second clamping member 11 (see Figures 3 and 6). When the protruding right side surface 10d of the first clamping member 10 is pressed, the switch 4 is pressed by the first clamping member 10. Subsequently, a signal based on the pressing status of the switch 4 is transmitted to the circuit board 5, and the sensor 2 is activated. Furthermore, while the sensor 2 is operating, the LED 6 lights up when the dripping of liquid droplets 202b is detected, and when the dripping of liquid droplets 202b stops, the LED 6 turns off or an alarm sound (not shown) is emitted to indicate that it has stopped.

[0030] 1.1.5 Configuration of Circuit Board 5 As shown in Figures 6A and 6B, a circuit board 5 that controls the operation of the sensor 2 is also located inside the housing 11c of the second clamping member 11, along with the spring 12 and the switch 4. The light-emitting unit 20 and the light-receiving unit 21 are electrically connected to this circuit board 5. The wiring that electrically connects the light-emitting unit 20 and the light-receiving unit 21 is preferably routed inside the mounting unit 1 to enhance aesthetics, but it may also be routed outside the mounting unit 1 (not shown). The circuit board 5 can be manufactured using known techniques. Although not shown, a battery for operating the sensor 2 is also located inside the housing 11c. A small battery, such as a button battery, is preferred. The circuit board 5 and the battery may also be located outside the housing 11c, for example, on top of the second clamping member 11.

[0031] 1.2 Installation configuration of the infusion detection device 100 To attach the drip detection device 100 to the drip chamber 200, first, the right side 10d of the first clamping member 10, which protrudes from the second clamping member 11, is pushed in (see Figures 6A and 6B). This action widens the space between the first clamping portion 10b and the second clamping portion 11b. At the same time, the left outer surface 10c of the first clamping member 10 pushes in the spring 12 and the switch 4, which are located between it and the inner surface of the left wall portion 11d of the second clamping member 11. At this point, the sensor 2 is activated when the switch 4 is pressed.

[0032] Next, the drip chamber 200 is placed in the space between the first clamping portion 10b and the second clamping portion 11b, and the pressure on the right side surface 10d of the first clamping member 10 is released (see Figures 6B and 7). The spring 12, which had been pressed in, now has a biasing force that pushes the first clamping member 10 out of the second clamping member 11, pushing the first clamping member 10 until the first clamping portion 10b contacts the drip chamber 200. Thus, the drip detection device 100 can clamp the drip chamber 200 between the first clamping portion 10b and the second clamping portion 11b.

[0033] The preferred position for clamping the drip chamber 200 is one where the height of the sensor 2 held by the extension 3 clamps the drip portion X. For example, the mounting part 1 is attached to the portion of the drip chamber 200 corresponding to the liquid level 202a, and the light-emitting part 20 and the light-receiving part 21 are mounted so as to clamp the drip portion X (see Figure 4).

[0034] To remove it, the right side 10d of the first clamping member 10, which protrudes from the second clamping member 11, is pushed in again to widen the space between the first clamping portion 10b and the second clamping portion 11b. This creates a gap from the state in which the drip chamber 200 is clamped, allowing it to be removed. Also, pushing in the right side 10d again releases the pressure on the switch 4, and the operation of the sensor 2 ends.

[0035] 1.3 Effects The extension portion 3 allows the sensor 2 to be held at a different position vertically from the mounting portion 1. In addition, as described above, by configuring the extension portion 3 to be rod-shaped so that it covers less than 10% of the circumference of the drip chamber 200, visibility of the drip portion X can be ensured from the front-to-back direction, the left-diagonal front-to-back direction, and the right-diagonal front-to-back direction.

[0036] By providing a biasing member (spring 12) and utilizing this biasing force to clamp, the sensor can be easily removed. The first clamping member 10 has a first extension 30, and the second clamping member 11 has a second extension 31, so that the light-emitting part 20 and the light-receiving part 21 can be held in a straight line in the left-right direction, facing the center line of the drip chamber 200. Furthermore, by holding the light-emitting part 20 and the light-receiving part 21 with separate rod-shaped extensions 30 and 31, visibility can be ensured while positioning the light-emitting part 20 and the light-receiving part 21 facing each other. In addition, by providing each extension 30 and 31 on each clamping member 10 and 11, the sensor 2 can be brought closer to the drip chamber 200 in accordance with the clamping operation.

[0037] By forming the mounting portion 1 in a thin plate shape, the area covering the drip chamber 200 in the vertical direction is reduced, improving visibility. By housing the first clamping member 10 in the housing portion 11c of the second clamping member 11, and by sliding the first clamping member 10 to adjust the space between the first clamping portion 10b and the second clamping portion 11b, it can be suitably attached to drip chambers 200 of various sizes.

[0038] Since the right side surface 10d of the first clamping member 10 protrudes from the second clamping member 11, it can be easily removed from the drip chamber 200 with one hand simply by pushing in the right side surface 10d.

[0039] 2. Second Embodiment In the first embodiment described above, the proportion of the circumferential direction covered by the first extension 30 and the second extension 31 of the drip chamber 200 was set to less than 5%. However, it is also possible to set the proportion of the circumferential direction covered by each extension 30, 31 to less than 10%, less than 15%, less than 20%, and less than 25%, respectively. In other words, the proportion of the circumferential direction covered by the two extensions 3 in total of the drip chamber 200 can be less than 20%, less than 30%, less than 40%, and less than 50%. By setting the proportion of the circumferential direction covered by each extension 30, 31 to less than 25% (the total proportion to less than 50%), visibility in the front-to-back direction can be ensured (see arrow in Figure 8A). However, by reducing the proportion of the circumferential direction covered by the extensions 3 to less than 40%, less than 30%, less than 20%, and less than 10%, visibility from oblique directions can also be ensured. From the standpoint of visibility, the lower the proportion of the extension portion 3 that covers the circumferential direction of the drip chamber 200, the better.

[0040] However, in order to ensure the strength of each extension portion 30, 31, depending on the material and shape, it is preferable that the proportion of each extension portion 30, 31 that covers the circumferential direction of the drip chamber 200 be 1% or more, and more preferably 2% or more. As a method to ensure strength while keeping the proportion of the extension portion 3 that covers the circumferential direction of the drip chamber 200 low, one method is to increase the bottom area of ​​the extension portion 3 that contacts the mounting portion 1 and configure it in a trapezoidal shape, as in the first embodiment (see Figure 4).

[0041] 3. Third Embodiment In the first and second embodiments described above, the drip detection device 100 was equipped with two extensions 3 (first extension 30, second extension 31), and the light-emitting unit 20 and the light-receiving unit 21 were arranged facing each other. However, as shown in Figure 8B, it is also possible to provide only one extension 3, and attach the light-emitting unit 20 and the light-receiving unit 21 to the single extension 3 with a gap between them vertically. Even with such a configuration, the dripping of the liquid droplet 202b can be detected by receiving the light emitted from the light-emitting unit 20 and reflected by the liquid droplet with the light-receiving unit 21. In the case of providing only one extension 3, by making the proportion of the circumferential direction covered by the extension 3 to less than 50% of the drip chamber 200, it is possible to view the dripping part X from an angle greater than 50%. Furthermore, by reducing the proportion of the extension portion 3 that covers the circumferential direction of the drip chamber 200 to less than 40%, less than 30%, less than 20%, less than 10%, and less than 5%, similar to the above embodiment, visibility from more directions can be ensured.

[0042] 4. Fourth Embodiment Figures 9A and 9B are plan views of the infusion detection device 100 according to the fourth embodiment of the present invention. In this embodiment, the first clamping member 10 and the second clamping member 11 have the same shape. The clamping members 10 and 11 are connected via a hinge 8 and are arranged opposite each other. Each clamping member 10 and 11 comprises a grip portion 7, a first clamping portion 10b, and a second clamping portion 11b, and each clamping portion 10b and 11b is constructed by cutting out semicircular shapes on the sides facing each other. Although not shown, the infusion detection device 100 of this embodiment also includes a biasing member (spring), and each clamping portion 10b and 11b is biased in the direction of moving closer to each other. In this embodiment, the circuit board is omitted, but it can be provided, for example, along the grip portion 7.

[0043] Furthermore, in this embodiment, the drip detection device 100 is provided with a first extension 30 on the first clamping member 10, and a second extension 31 on the second clamping member 11, similar to the first embodiment. The first extension 30 holds the light-emitting part 20, and the second extension 31 holds the light-receiving part 21.

[0044] Even with this configuration, the space between the first clamping portion 10b and the second clamping portion 11b can be widened by bringing the two grip portions 7 closer together against the biasing force of the biasing member (see Figure 9A). By placing the drip chamber 200 in that space, the drip chamber 200 can be clamped (see Figure 9B).

[0045] 5. Other Examples The drip detection device 100 of the above embodiment may also be configured by inverting it vertically. Specifically, the mounting part 1 may be made attachable to the lid portion of the drip chamber 200 or the portion just below the lid, and the extension part 3 may be configured to extend downward (not shown).

[0046] In the above embodiment, the mounting portion 1 comprises a first clamping member 10 and a second clamping member 11, and the drip detection device 100 is attached by clamping the drip chamber 200 with the two clamping members 10 and 11. However, the configuration of the mounting portion 1 is not limited to this. For example, the mounting portion 1 may be composed of only one member, and an adhesive member may be used, and the drip detection device 100 may be attached to the drip chamber 200 by the adhesive force of the member. Alternatively, the mounting portion 1 may be provided with a groove slightly narrower than the drip chamber 200, and the drip chamber 200 may be pushed into the groove, thereby attaching the drip detection device 100 by the elasticity of the mounting portion 1.

[0047] The extension portion 3 (first extension portion 30 and second extension portion 31) may be configured to be detachably attached to the mounting portion 1, or it may be configured to be foldable relative to the mounting portion 1. To make it foldable, for example, wiring can be done using a flexible circuit board. With such a configuration, the drip detection device 100 can be carried and stored in a compact state. [Explanation of Symbols]

[0048] 1: Mounting part 2: Sensor 3: Extension part 4: Switch 5: Circuit board 6: LED 7: Grip part 8: Hinge 10: First clamping member 10a: First clamping groove 10b: First clamping part 10c: Left outer surface 10d: Right side surface 11: Second clamping member 11a: Second clamping groove 11b: Second clamping part 11c: Accommodation part 11d: Left wall part 11e: Upper wall part 11f: Lower wall part 11g: Front wall part 11h: Rear wall part 12: Spring 20: Light emitting part<00​​​​​​​​​​​​​​​​​​​​​​​​​

Claims

1. Intravenous drip detection device, It comprises a mounting part, a sensor, and an extension part. The mounting portion is configured to be attachable to the drip chamber in an inverted manner, The aforementioned sensor is configured to detect intravenous drip, The extension portion extends toward one side in the longitudinal direction of the drip chamber relative to the mounting portion, and is configured to hold the sensor at the position where it extends in the longitudinal direction. A drip detection device configured such that the proportion of the drip chamber covered by the extension in the circumferential direction is less than 50% of the entire circumference of the drip chamber.

2. The intravenous drip detection device according to Claim 1, The aforementioned mounting portion has a shape that is symmetrical with respect to a plane perpendicular to the longitudinal direction, and is used as an intravenous drip detection device.

3. An intravenous drip detection device according to claim 1 or claim 2, The mounting portion comprises a first clamping member and a second clamping member, The sensor has a light-emitting part and a light-receiving part, The first clamping member is provided with a first extension and the second clamping member is provided with a second extension, comprising two extensions. The device includes a biasing member that biases the first clamping member and the second clamping member so that they clamp the drip chamber, A drip detection device in which one of the first extension and the second extension holds the light-emitting part and the other holds the light-receiving part.

4. The intravenous drip detection device according to claim 3, The first clamping member and the second clamping member are each formed in the shape of a thin plate with the longitudinal direction being the thickness direction, The second clamping member is provided with a housing portion into which the first clamping member can be inserted in the direction of clamping the drip chamber, The first clamping member has a first clamping groove formed by cutting out a side surface in the longitudinal direction that is different from the sliding direction in which the second clamping member slides and the longitudinal direction, The second clamping member has a second clamping groove formed by cutting out a side surface of the first clamping member in the same direction as the side surface, along the longitudinal direction. The drip chamber is configured to be clamped between a first clamping portion in the first clamping groove in the insertion direction of the first clamping member and a second clamping portion in the second clamping groove in the removal direction of the first clamping member. The biasing member is provided between the outer surface of the first clamping member in the insertion direction and the bottom surface of the housing portion in the drip detection device.

5. The intravenous drip detection device according to claim 4, An intravenous drip detection device in which the first clamping member and the second clamping member clamp the drip chamber, and the end of the first clamping member in the extraction direction protrudes from the second clamping member.

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