JP3134916B2 - Infusion liquid measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drip liquid measuring apparatus which can easily measure the number of drops or the amount of drip liquid at a drip tube.

[0002]

2. Description of the Related Art Currently, an infusion apparatus most frequently used in hospitals and clinics is shown in FIG. In this drip apparatus, a drug solution bottle 2 is suspended from a stand 1, and an infusion tube 3 is connected to a lower portion of the drug solution bottle 2. Further, the infusion tube 3 is provided with a drip tube 4 and a crumb 5 which are generally referred to as a chamber in a continuous manner, and the other end of the infusion tube 3 supports a drip needle 6 which is inserted into an arm or the like.

The infusion tube 4 is for observing the infusion state by the infusion tube 3, that is, the infusion speed, and has a transparent cylindrical shape as a whole. That is, in the part of the drip tube 3, the infusion state of the drip liquid is determined by its drop state, that is, the number of drops of the liquid per unit time.
It is possible to visually check. In general, the amount of infusion of a drug solution for infusion to a patient is individually set according to the type and medical condition of the patient, and the indication of XXCC per hour is indicated by an instruction of a pharmaceutical company or a doctor. The nurse performing the infusion adjusts the infusion amount based on these instructions. And in the case of an adult drip tube, the number of visible drops is 16 to 20 drops and about 1 CC.
In the case of a pediatric infusion tube, it is possible to achieve 1 CC infusion with 60 drops visible. Based on these values, the nurse counts the number of drops in the drip tube per unit time (for example, 10 seconds) while looking at the stopwatch or the second hand of the clock.
The calculation is performed by mental arithmetic to determine whether or not the amount of infusion is as specified by the instructions of the pharmaceutical company or the doctor (that is, OOCC per hour). The clamp 4 adjusts the conduit of the infusion tube 2. The nurse or the like contracts the conduit by the clamp 4 when the amount of drip calculated by the mental arithmetic is large and when the amount of drip is small. The adjustment is repeated so that the pipe line is widened so that the dropping speed of the liquid in the drip tube 4 becomes a predetermined value (that is, the speed as instructed).

[0004] Incidentally, it has been pointed out that there are individual variations in the visual measurement of the nurse and the calculation of the infusion volume by mental arithmetic, and questions have been raised about the accuracy thereof. For this reason, recently, data relating to the amount of drip is input in advance, the supply amount of the drip liquid per hour is automatically set, and an automatic supply device of the supplied drip liquid is disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 4-51963. And JP Hei 3
No. 297473 has been proposed. The automatic supply device is provided outside the drip tube, and optically measures means for counting the number of drip liquids that fall per unit time.
A control pump is provided in the infusion tube and expands / contracts the infusion line so that the infusion volume set in advance is infused in the tube, and pressure-feeds. That is, this device relates to a device for automatically controlling the operation of the pump so that the infusion amount per unit time measured in real time by the measuring means becomes the infusion amount set in advance. Without relying on visual measurement or mental arithmetic by IV, the amount of infusion set automatically can be set, so once set, it will continue to operate until the liquid in the liquid bottle runs out,
It is considered to be very excellent in workability.

[0005]

Problems to be Solved by the Invention By the way, the above-mentioned automatic infusion liquid supply apparatus is very expensive, and is commercially available at 300,000 to 600,000 yen per unit. In addition, manufacturers of manufacturers of infusion tubes, infusion tubes, etc. manufacture these devices based on their own standards and sell them.Drip cylinders with different outside diameters vary from manufacturer to manufacturer. It has been considered difficult to package the measuring means (the width of the concave portion for measurement varies) of the automatic supply device. Furthermore, since it is not possible to set an automatic supply device of another maker for the infusion set shown in FIG. 8 that is already operating in a hospital or a clinic, for example, the range of product purchase is naturally limited.

Further, the above-mentioned automatic liquid supply apparatus for a drip liquid is large in scale and difficult to operate, so that it can be adapted to a drip cylinder of any manufacturer.
There has been a demand for the development of a measuring device capable of simply and accurately measuring the number of infusions.

The present invention enables a nurse or the like to walk in a pocket, is excellent in operability, and can be applied to an infusion tube of any manufacturer, and can accurately measure the amount or number of infusions. It is intended to provide a measuring device.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a drip liquid measuring apparatus for measuring the number of drops of drip liquid falling per unit time inside a generally cylindrical drip tube. , A housing provided with a display unit for displaying the measured value at a predetermined position, which can be held in the hands of the measurer in an overall box shape, and formed on one side of the housing and capable of accepting a drip tube, allowing the drip tube to be received. A recess provided on its inner surface with a sensor for measuring the number of drops of the drip liquid falling per unit time,
The contact switch, which is disposed at the innermost part of the concave part and comes into contact with the drip cylinder by pressing the drip cylinder toward the concave part with a finger and starts the operation of the sensor, and further, the inner wall of the inner part of the concave part is received. In order to support two points on the outer circumference of the drip tube, the diameter of the drip tube is V-shaped and the diameter of the drip tube is reduced toward the back. And a positioning means that enables the positioning.

[0009]

According to the measuring device of the present invention, even if a cylindrical drip tube varies from manufacturer to manufacturer, the drip tube is received in the concave portion provided on one side of the housing held by the hand, and the measurement is performed. When the user presses the drip tube against the concave portion with his / her finger, the drip tube comes into contact with the contact switch at the innermost portion of the concave portion, and further contacts two inner walls of the V-shaped inner portion serving as positioning means to measure the total amount. Positioning is performed at three points. The operation of the sensor is started in a state where the drip tube is positioned with respect to the concave portion, and the sensor disposed on the inner surface of the concave portion measures the number of drops of the drip liquid falling in the drip tube per unit time, and determines the predetermined number of the housing. It is possible to display measured values such as the amount of drip and the number of infusions on a display unit provided at the position. As a result, a measuring device that enables a nurse or the like to walk while putting it in a pocket, has excellent operability, can correspond to an infusion tube of any manufacturer, and can accurately measure the amount or number of infusions. It can be provided.

[0010]

1 to 8 show a measuring apparatus according to an embodiment of the present invention. As shown in FIG. 3, the measuring device 10 has a size such that the whole is held in the palm of one hand, and has a size that can be stored in a breast pocket or the like. The measuring device 10 includes a box-shaped housing 11 having a flat rectangular shape as a whole, and the housing 11 is made of reinforced plastic. The housing 11 includes a display unit 12 that displays a measured value on a front side thereof. The display unit 12
On the right side (see FIG. 1), three display mode lamps 13A, 13B, and 13C each including an LED are arranged in order from the top.

On one side of the entire surface of the housing 11, as shown in FIG. 3, a concave portion 14 for receiving the drip tube 4 of the infusion device is provided.
Is formed. As shown in FIG. 4, the concave portion 14 has a V-shaped shape in which the front side is perpendicular to one side of the entire surface of the housing 11 when viewed from a plane, and the diameter of the concave side decreases as the depth increases. Transparent windows 15a and 15b for sensor light are formed on the inner surface on the near side of the recess 14, respectively (see FIG. 5). As shown in FIG. 5, a substrate 16 is provided inside the housing 11, and a light emitting sensor 17 is provided at a position corresponding to the right transmission window 15a on the substrate 16, and a light emission sensor 17 is provided at a position corresponding to the left transmission window 15b. The attendance sensor 18 is provided. The light emitting sensor 17 can emit sensor light toward the light receiving sensor 18, and the sensor light can be input to the light receiving sensor 18 through the respective transmission windows 15 a and 15 b.

A contact switch 19 is provided at the deepest part of the concave part 14 on the inner side of the V-shape (see FIG. 5). The contact switch 19 is constituted by a micro switch, and the contact switch 20 having a constant stroke L1 is advanced from the innermost portion toward the near side of the concave portion 14 (see FIG. 4). The contact switch 19 turns on and off the light-emission and light-reception sensors 17 and 18. As shown in FIG. 3, the drip tube 4 is received in the recess 14, and the drip tube 5 is pressed toward the recess 14 with a finger. Thus, the drip tube 4 and the contact 20 are brought into contact with each other. The abutment 20 is retracted to the inner side of the concave portion 14 by contacting the drip tube 5, and as a result, the switch 19 is turned on, the sensors 17 and 18 are turned on, and the sensors 17 and 18 are turned on. It is configured to be.

Here, the outer diameter of the drip tube 4 received in the concave portion 14 is variously varied depending on the manufacturer. In the measuring device 10 according to the present embodiment, the width of the concave portion 14 is set to the outer diameter of the largest drip tube 4 and is set to a size capable of receiving the same. In this way, the drip tube 4 received in the concave portion 14 has its outer periphery in contact with the abutment 20 (R
), And also at two points (points P and Q in FIG. 4, point P) on the inner wall of the inner part whose diameter is reduced in a V-shape.
That is, the drip tube 4 has its outer periphery 3 at the back of the recess.
The point will be held and will be positioned in the concave portion 14. Such positioning is performed similarly in the case of, for example, a drip tube 4 having a small outer diameter (see FIG. 4 and a two-dot chain line S) or a drip tube 4 having a large outer diameter.

The abutment 20, which has been advanced from the innermost portion of the concave portion 14 by the stroke L1, receives the maker's drip tube 4 having the maximum outer diameter in the concave portion 14, and the drip tube 4 has a V The operation start stroke is set to L2 so that the switch 19 can be turned ON even when the switch 19 is in a retracted state in contact with the abutment 20 together with the two inner wall points (see FIG. 4).

As described above, when the contact switch 19 is received in the recess 14 and the contact switch 19 is turned on, the circuit on the substrate 16 inside the housing 11 is operated. Substrate 16
On the top, a CPU 21 and an operation switch 22 are mounted in addition to the light-emitting sensor 17, the light-receiving sensor 18, the contact switch 19, and the display unit 12. A battery (not shown) is mounted on the surface of the substrate 16. CPU 21
As shown in FIG. 6, each of the sensors 17 and 17 receives an ON operation signal from the contact switch 19 (ie, a signal transmitted when the contact 20 detects the acceptance of the drip tube 4). The operation command of the light emission sensor 17 is started.
Receives the operation command, and makes it possible to emit sensor light toward the light receiving sensor 18. Inside the drip tube 4, the sensor light is shielded by the falling drip liquid, and during this time, the light receiving sensor 18 does not sense the reception of the sensor light. This state is output from the light receiving sensor 18 to the CPU 21 in real time, and the pulses a, b, c, and
While d and e are sequentially counted (see FIG. 7), the number of pulses per predetermined time (for example, span Ta: T1-T0) (that is, the number of drops of the drip liquid) can be calculated. Further, in the CPU 21, the light receiving time α (t1 + t2 + t3 + t4 +
t5) can also be calculated. Based on the number of drops (number of drops) of the infusion liquid per fixed time calculated in this way, the CPU 21 can further calculate the following measured values of ABC.

A. Amount of liquid dripped per minute (○○
CC / min)

B. Amount of dripping liquid per hour (○○
CC / hr)

C. Number of drops of infusion liquid per minute (number of drops XX drops / min)

First, the value of C is obtained by first calculating the operation value β according to the following equation (1), and then obtaining it based on the equation (2).

Light receiving time α / number of drops per span Ta = β (1)

60 / β = C (OO drops / min) (2)

Further, 1 which is previously set and input to the CPU 21
Based on the value γ of the volume per drop (○ CC), the value of A is calculated by the CPU 21 according to the following equation (3).

Γ × C = A (XXCC / min) (3)

Further, in the CPU 21, the following (4)
The calculation based on the equation is also performed, and the value of B is also obtained.

A × 60 = B (4)

As described above, in the CPU 21, based on the number of drops in the latest span (for example, span Tb, span Tc... Span Tn) sequentially input from the light receiving sensor 18, the measured values A, B, C
Is calculated. Further, such measured values can be selectively displayed on the display unit 12 by switching the switch lever 23 of the operation switch 22 to each of the switching mode positions A, B, and C in FIG. 5 or FIG. You.
That is, in the position of the switching mode A of the switch lever 23, the CPU 21 enables the display unit 12 to instruct the display mode A, that is, the display of the value of the above A. This display mode can be monitored by turning on the display mode lamp 13A. When the switch lever 23 is in the switching mode B position, the CPU 21 enables the display unit 12 to instruct the display mode B, that is, the display of the value of B.
This display mode can be monitored by turning on the display mode lamp 13B. When the switch lever 23 is in the switching mode C position, the CPU 21
2 can be instructed to display mode C, that is, display of the value of C. This display mode can be monitored by turning on the display mode lamp 13C. As described above, the operation switch 22 is capable of displaying the measured values A, B, and C in real time on the display unit 12 by the switching operation of the switch lever 23, and the display unit 12 is provided with a liquid crystal or LED display panel. And the like.

After the measurement is performed, the drip tube 4
Away from the recess 14. Then, the contact 20 of the contact switch 19, which has been in contact with the drip tube 4, is restored to the original stroke L1.
And the circuit on the substrate 16 is turned off.

Next, the operation of the above embodiment will be described. According to the measuring device 10 described above, even if it is a cylindrical drip tube 4 having an outer diameter that varies depending on the manufacturer, the housing 11 held by the hand
The drip tube 4 is received in the concave portion 14 arranged on one side of the concave portion, and a measuring person such as a nurse presses the drip tube 4 toward the concave portion 14 with a finger, so that the drip tube 4 is positioned at the innermost portion of the concave portion 14. Contact 2
0, and further, it contacts two inner walls of the V-shaped inner part as positioning means, and is positioned at a total of three points (P point, Q point, R point). When the drip tube 4 is positioned with respect to the recess 14, the CPU 21 starts operating the sensors 17 and 18, and the sensors 17 and 18 disposed on the inner surface of the recess 14 cause the unit of the drip liquid to fall in the drip tube 4. The number of drops per time (span) will be measured. Further, the CPU 21 calculates the ABC measurement values based on these values input from the sensor 18, and these values are selectively displayed on the display unit 12 by operating the switch lever 23 of the operation switch 22. Becomes possible. The measuring device 10 is small enough to fit in the palm of a hand and can be carried around in a pocket by a measuring person such as a nurse, and is handy.

Also, the measurement is performed by the measurer by placing the drip tube 4 in the recess 14.
It is easy to operate because it is enough to accept and operate by pressing with a finger. In addition, the nurse is free from troublesome measurement such as watching the drip liquid while simultaneously watching the second hand of the stopwatch and the clock or the mental arithmetic as in the related art, and simply watching the display (digital display) on the display unit 12. Since only the operation of the clamp 5 is sufficient, the burden required for the operation of monitoring the drip is greatly improved. In addition, since the operation of the measuring device 10 is turned ON / OFF by the contact 20 of the contact switch 19, the trouble of confirming the switch OFF is troublesome. Further, the measuring device 10 has a built-in microcomputer having an IC mounted on the substrate 16 and can be manufactured at a low cost (the price can be set to about 120,000 yen).

As described above, according to the present invention, a nurse or the like can walk while putting it in a pocket, has excellent operability, and can be applied to a drip tube of any manufacturer and can accurately inject a drip. Alternatively, there is an effect that a measurement device capable of measuring the number of drops can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a measuring device according to one embodiment of the present invention as viewed from the front side.

FIG. 2 is a perspective view showing the entire measuring device.

FIG. 3 is a perspective view showing a state in which the measuring device is externally mounted on a drip tube of the infusion device.

FIG. 4 is a plan view of the measuring device.

FIG. 5 is a sectional view taken along the line VV in FIG. 1;

FIG. 6 is a block diagram showing a circuit in the measuring device.

FIG. 7 is a waveform diagram showing an electrical measurement state of a drip liquid falling in a drip tube.

FIG. 8 is a perspective view showing a conventional general infusion device.

[Explanation of symbols]

 Reference Signs List 1 stand 2 liquid medicine bottle 3 infusion tube 4 infusion tube 5 clamp 6 infusion needle 10 measuring device 11 housing 12 display unit 13A, 13B, 13C display mode lamp 14 recess 15a, 15b transmission window 16 substrate 17 light emitting sensor 18 light receiving sensor 19 contact Switch 20 Contact 21 CPU 22 Operation switch 23 Switch lever

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A61M 5/168 G01F 23/00

Claims (2)

(57) [Claims] 1. A drip liquid measuring device for measuring the number of drops of drip liquid falling per unit time inside a generally cylindrical drip tube, wherein the drip liquid is capable of being held in the hands of a measurer in the form of an entire box. And a sensor that is formed on one side of the housing and that accepts the drip tube and measures the number of drops of drip liquid falling in the drip unit per unit time. A recess provided on the inner surface thereof; and a contact switch disposed at the innermost portion of the recess, which contacts the drip tube by pressing the drip tube toward the recess with a finger and starts operation of the sensor. The inner wall of the inner side of the concave portion is formed in a V-shape whose diameter is reduced toward the inner side so as to be able to support two outer peripheral points of the drip tube to be received. Positioning with a total of 3 points, a point and a contact switch Measuring apparatus infusion liquid comprising a positioning means for the ability. 2. Based on the number of drops of the drip liquid per unit time falling in the drip tube in the recess measured by the sensor, A. Instillation amount of infusion liquid per minute B. Dropping amount of infusion liquid per hour An operation circuit for calculating the number of drops of the infusion liquid per minute in real time is provided inside the housing, and an operation switch is provided outside the housing so that the calculation results of A, B, and C can be selectively displayed on a display unit. The measuring device for an infusion liquid according to claim 1, further comprising: