JP2012061083A - Foot part volume measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foot part volume measuring instrument capable of more enhancing precision and reproducibility and shortening the measuring time because a water surface wave is easy to generate in a conventional foot part volume measuring instrument and time is required in the attenuation of the water surface wave.SOLUTION: In the foot part volume measuring instrument 1, the cross-sectional shape on the bottom side of an upward opened container 2 is formed into an elongated shape corresponding to the shape of a foot and the cross-sectional shape on the opening side of the container 2 is formed into a shape reduced in an opening cross-sectional area by shortening a tiptoe side 3 while an inclined wall 5 is provided corresponding to an area change between the bottom and opening sides of the container while a water flooding part 7 is provided to the wall on the heel side 4 of the container.

Description

  The present invention relates to a foot volume measuring device that can easily and quantitatively measure the expansion of a foot during, for example, ankle sprain.

For example, Non-Patent Document 1 discloses hyperbaric oxygen therapy (HBO: Hyperbaric) for ankle sprains.
As a result of measuring the volume of the foot and ankle joint immediately before and after the execution of Oxygen Therapy), an average 25 cm3 volume reduction (p <0.01) was found.

  In the measurement of the volume of such a foot / ankle joint (in the present invention, for the sake of convenience, a relatively wide range in which the foot and ankle are immersed in water is generically referred to as a foot), the measurement is highly accurate and reproducible. A bowl is necessary.

  Examples of conventional foot volume measuring devices include those shown in FIGS. This measuring device is configured to have an elongated shape corresponding to the shape of the foot, and the overflow portion b is provided in a rectangular parallelepiped container a having an open upper side. In the state where the water c is filled up to the overflow portion b in the container. The foot part d is soaked, and at this time, the water e overflowing through the overflow part b is received by another container f. Then, the weight of the foot d is measured based on the weight and specific gravity of the water e that has been accumulated in the other container f until the water surface is calmed with the feet evenly loaded and evenly loaded on each foot. Is what you want.

The problem with this type of measuring instrument is that water waves are generated by body movements in the process of standing up and resting when the feet are immersed, and this generation of water waves increases the coefficient of variation of the measured values. As a result, the accuracy is lowered, and if it takes time for the water surface wave to attenuate and the water surface to calm down, the measurement time tends to increase accordingly. The coefficient of variation (CV) is expressed by the following equation.
Coefficient of variation (CV): standard deviation ÷ average value x 100 (%)

Yanagishita, Oga, “Efficacy of hyperbaric oxygen therapy for ankle sprains”, Journal of the Japanese Orthopedic Sports Medicine Society, Japan Orthopedic Sports Medicine Society, 2008, Vol.27, No.4, p.17-21

  The problem to be solved by the present invention is that, in a conventional measuring instrument having a rectangular parallelepiped shape and having an overflow portion provided in a container having an upper opening, water waves are likely to occur, and it takes time to attenuate. Therefore, an object of the present invention is to provide a measuring device that solves such problems and can improve accuracy and reproducibility and shorten the measurement time.

  In the present invention, in order to solve the above problems, the bottom side cross-sectional shape of the container having the upper side opened is configured to be an elongated shape corresponding to the shape of the foot, and the opening side cross-sectional shape is opened by shortening the toe side. A shape with a reduced cross-sectional area, an inclined wall provided between the bottom side and the opening side corresponding to the change of the area, and a flooded part on the heel side wall at a height where the opening cross-sectional area is reduced A volume measuring device is proposed.

  In the present invention, it is proposed that in the above configuration, the upper end of the inclined wall is provided with a distance from the opening end, and a vertical wall is provided up to the opening end.

  Furthermore, the present invention proposes to provide an inclined wall and a vertical wall as partition walls of an elongated rectangular parallelepiped container in the above configuration.

  In the measuring instrument of the present invention, the opening side cross-sectional shape is a shape in which the toe side is shortened to reduce the opening cross-sectional area, and an overflow portion is provided on the heel side wall at a height where the opening cross-sectional area is reduced. Since it is configured, it becomes difficult for water waves to occur due to body movement, and even if it occurs, it quickly attenuates.

  By reducing the influence of the water surface wave in this way, the accuracy and reproducibility can be further increased and the measurement time can be shortened as compared with the conventional case.

  Although the opening cross-sectional area is reduced, the bottom-side cross-sectional shape is formed in an elongated shape corresponding to the shape of the foot, so that there is no hindrance to the standing / resting operation by immersing the foot.

  Since an inclined wall is provided between the bottom side and the opening side where the area changes, even if bubbles are generated on the toe side when dipping the foot, it rises along the inclined wall and is discharged, This does not cause a measurement error.

FIG. 1 is a perspective view showing a first embodiment of a foot volume measuring device of the present invention. FIG. 2 is a longitudinal sectional view showing a first embodiment of the foot volume measuring device of the present invention. FIG. 3 is a longitudinal sectional view showing a usage state in the first embodiment of the foot volume measuring device of the present invention. FIG. 4 is a perspective view showing a second embodiment of the foot volume measuring device of the present invention. FIG. 5 is a longitudinal sectional view showing a second embodiment of the foot volume measuring device of the present invention. FIG. 6 is a perspective view showing an example of a conventional foot volume measuring device. FIG. 7 is a longitudinal sectional view showing an example of a conventional foot volume measuring device. FIG. 8 is a longitudinal sectional view showing a usage state of a conventional foot volume measuring device. FIG. 9 shows the coefficient of variation in the measurement for five people. FIG. 10 shows a coefficient of variation in measurement of an object (plastic bottle) as a dummy together with the result of FIG. FIG. 11 shows the measurement time in the measurement for five people. FIG. 12 shows the measurement time in the measurement of an object (pet bottle) as a dummy together with the result of FIG.

  Embodiments of a foot volume measuring device of the present invention will be described below with reference to the accompanying drawings.

  First, in FIGS. 1 to 3 corresponding to the first embodiment, reference numeral 1 generally indicates a foot volume measuring device of the present invention, and reference numeral 2 indicates an elongated shape corresponding to the shape of a human foot. The reference numeral 3 corresponds to the toe side, and the reference numeral 4 corresponds to the heel side.

  In this embodiment, an inclined wall 5 is provided as a partition wall from a position slightly below the intermediate height on the toe side 3 of the container 2 to a substantially intermediate position toward the heel side 4, and upward from the upper end thereof. A vertical wall 6 is provided. And the pipe-like overflow part 7 is provided in the wall of the ridge side 4 so as to protrude.

  In this way, the bottom side cross-sectional shape of the container 2 opened on the upper side is formed into an elongated shape corresponding to the shape of the foot, and the open side cross-sectional shape shortens the toe side to reduce the open cross-sectional area. The foot volume measuring device 1 is configured in such a manner that an inclined wall 5 is provided between the bottom surface side and the opening side corresponding to a change in area, and an overflow portion 7 is provided on the heel side 4 wall.

In the above configuration, for example, in order to measure the expansion of the foot during ankle sprain, as shown in FIG. 3, the receiving container 8 corresponds to the overflow portion 7 on the heel side 4 of the foot volume measuring device 1. In a state where the container 2 is filled with the water 9 up to the overflow portion 7, the foot portion 10 is immersed, and the feet 2 are evenly loaded and stood and rested. Then, after immersing the foot portion 10, the water 11 overflowed from the overflow portion 7 is received by the container 8 until the water surface calms down, and the weight is measured. From the weight and specific gravity (for example, specific gravity 1 g / cm ³ ) The volume of the foot 10 can be calculated.

  As described above, the foot volume measuring device 1 of the present invention has a shape in which the opening cross-sectional area is reduced, and the overflow portion 7 is provided in the wall on the heel side 4 at the height where the opening cross-sectional area is reduced. Therefore, it is difficult for a water surface wave to occur due to body movement when the foot 10 is immersed, and even if it occurs, it quickly attenuates. In addition, if the overflow part 7 is the wall of the ridge side 4 of the height where the opening cross-sectional area reduced, it can also provide in the wall of a longitudinal direction other than providing in the wall of a width direction like illustration.

  Thus, the influence of the water surface wave can be reduced, and the accuracy and reproducibility can be improved and the measurement time can be shortened as compared with the conventional foot volume measuring device which is a simple rectangular parallelepiped container.

  Although the cross-sectional area of the opening is reduced in this way, the cross-sectional shape on the bottom side is configured to be an elongated shape corresponding to the shape of the foot. Absent.

  And in this invention, since the inclined wall 5 is provided between the bottom face side and opening side where an area changes, even if a bubble generate | occur | produces on the toe side 3 when the foot part 10 is immersed, along the inclined wall 5 So that it does not cause measurement errors.

  Next, FIGS. 4 and 5 show a second embodiment of the present invention. In the first embodiment described above, the inclined wall 5 and the vertical wall 6 are used as partition walls of the rectangular parallelepiped container 2. In the second embodiment, the inclined wall 5 and the vertical wall 6 are configured as outer walls of the container 12.

  In this configuration, it is possible to reduce the material such as acrylic for forming the container 12.

  The other components are the same as those in the first embodiment, and the operations are the same. Therefore, in the second embodiment, the same reference numerals as those in the first embodiment are given to the corresponding components. In addition, overlapping explanation is omitted.

  Next, the results of measurements comparing the performance of the foot volume measuring device of the present invention and the conventional foot volume measuring device will be described.

First, specifications of the present invention and a conventional foot volume measuring device will be described.
The conventional foot volume measuring instrument is the Volumetric Edema manufactured by Baseline.
Gauge (volumetric edema gauge), the opening size of the container a is 15 cm × 34 cm, and the size from the bottom to the overflow portion b is 16 cm.
On the other hand, the foot volume measuring device 1 of the present invention corresponds to the above-described first embodiment, and the opening size of the container 2 and the size from the bottom to the overflow portion 7 are the same. On the other hand, the size of the opening is 15 cm × 16 cm.

  Next, as measurement objects, five people A to E shown in Table 1 below and PET bottles (500 ml × 2) were used as dummy objects shown in Table 2 below. In human measurement, body movement during measurement is inevitable, but in measurement of an object (plastic bottle), the influence of body movement in a human can be excluded.

  Among the objects to be measured, for humans, the volume and measurement time are measured and recorded 5 times for each of the right and left feet, 10 times in total. In addition, the object (pet bottle) was filled with water and attached with a weight so as to sink, thereby measuring the volume and measuring time five times each. And about the measured value, the variation coefficient shown by the following Formula was computed and it was set as evaluation of reproducibility. Coefficient of variation (CV): standard deviation ÷ average value x 100 (%)

  Table 1 shows information on the person to be measured, the average value of the volumes measured for them, and the standard deviation in the present invention and the conventional foot volume measuring device. Table 2 shows the average value of the volume measured for the object to be measured (pet bottle) and the standard deviation in the present invention and the conventional foot volume measuring device.

  FIG. 9 is a graph showing the results of calculating the coefficient of variation (%) of all measurement subjects based on the recorded measurement values. In the figure, the notations “A right” and “A left” mean “the right foot of the person A to be measured” and “the left foot of the person A to be measured”, respectively. is there. As shown in the figure, the left side corresponds to the conventional foot volume measuring device, and the right side corresponds to the foot volume measuring device of the present invention.

  FIG. 10 is a graph showing the result of calculating the coefficient of variation (CV) of the object (pet bottle) based on the recorded measurement values. In this graph, for the sake of convenience, the calculation of the person to be measured shown in FIG. The result is also shown, and the result of the object (plastic bottle) is enclosed by an ellipse in the figure for convenience.

  Further, FIG. 11 is a graph showing the measurement time of all persons to be measured, and FIG. 12 shows the measurement time of the object (pet bottle) together with the measurement time of the person shown in FIG.

The following can be understood from the above measurement results.
1. Measurement results for human subjects (a) Since both the conventional and foot volume measuring devices of the present invention have a coefficient of variation of 1% or less, it can be seen that both are measuring devices with good reproducibility.
(B) However, the coefficient of variation (0.33 ± 0.16%) of the present invention is about a half of the coefficient of variation (0.79 ± 0.33%) of the conventional one, and the measurement time ( 1.2 ± 0.33 minutes) is about one third of the conventional measurement time (4.1 ± 1.2 minutes), and the foot volume measuring device of the present invention is more than the conventional foot volume measuring device. It turns out that it is high performance.
2. Measurement results for an object (pet bottle) that is not affected by body movement The coefficient of variation (0.33%) of the present invention is equivalent to the coefficient of variation (0.26%) of the conventional one, and The measurement time (1.0 minute) was about one-half compared with the conventional measurement time (2.3 minutes).

  As described above, since the foot volume measuring device of the present invention has a shape with a reduced opening cross-sectional area, it is difficult for water surface waves to occur, and new water surface waves are generated due to body movement due to fatigue or the like during measurement. Since it decays quickly even if it occurs, the increase in the coefficient of variation can be suppressed, and thus the coefficient of variation is small compared to the conventional foot volume measuring device, so that it is highly accurate and the measurement time can be shortened. There is a special effect.

  As described above, the foot volume measuring device of the present invention can easily and quantitatively measure foot swelling during ankle sprain, etc., and can also quantitatively evaluate edema in the perinatal period. In addition, it can be used as a foot volume measuring device capable of precise measurement in a wide range of fields.

DESCRIPTION OF SYMBOLS 1 Foot volume measuring device 2 Container 3 Toe side 4 Reed side 5 Inclined wall 6 Vertical wall 7 Overflow part 8 Other container 9 Water 10 Foot part 11 Overflowed water 12 Container

Claims (3)

The bottom side cross-sectional shape of the container opened on the upper side is formed in an elongated shape corresponding to the shape of the foot, and the open side cross-sectional shape is a shape in which the open cross-sectional area is reduced by shortening the toe side, A foot volume measuring device characterized in that an inclined wall is provided between the opening sides in response to a change in area, and an overflow portion is provided on the heel side wall at a height where the opening cross-sectional area is reduced. The foot volume measuring device according to claim 1, wherein the upper end of the inclined wall is spaced from the opening end, and a vertical wall is provided up to the opening end. The foot volume measuring device according to claim 2, wherein the inclined wall and the vertical wall are provided as a partition wall of the elongated rectangular parallelepiped container.

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