CN110870774A

CN110870774A - Tester for maximum isometrial force of quadriceps femoris, test chair, test bed and measurement method

Info

Publication number: CN110870774A
Application number: CN201911261301.9A
Authority: CN
Inventors: 王金龙; 程建红
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-03-10

Abstract

The invention discloses a tester for testing maximum isometrial force of quadriceps femoris, which comprises a base, wherein a force sensor and a fixed pulley are arranged on a bottom plate of the base, a tension-free bridle is arranged on a metal rod of the force sensor, the metal rod points to the middle of the fixed pulley, the distance from the metal rod to the bottom plate is the same as the distance from the middle part of the fixed pulley to the bottom plate, the tension-free bridle bypasses the fixed pulley, the data output end of the force sensor is connected with a signal converter, and the output end of the signal converter is connected with a terminal; the muscle strength is measured in a mode that the force sensor is matched with the fixed pulley, and compared with a traditional manual muscle strength evaluation method, the muscle strength evaluation method has the advantages that the measurement result is more visual, accurate and objective; meanwhile, the device is convenient to detach and install, can be directly installed on a sickbed and a chair, is convenient to use, and can complete detection only by enabling a patient to sit on the chair or lie on the bed and applying force with the ankle facing the front during measurement, so that the device can monitor the muscle strength change condition of the patient in the rescue treatment in real time.

Description

Tester for maximum isometrial force of quadriceps femoris, test chair, test bed and measurement method

Technical Field

The invention relates to the field of medical instruments, in particular to a tester and a measuring method for the maximum isometrial force of quadriceps femoris.

Background

ICU acquired myasthenia (ICU-AW) refers to a clinical manifestation of myasthenia in a severe patient, but there are no diseases clearly causing myasthenia except the critical disease of the patient. With the development of critical medicine, the overall survival rate of ICU patients increases, and ICU-AW is receiving more and more attention. The common symptoms of ICU-AW are the situation that an ICU patient is transferred out of an ICU ward or suffers from motor dysfunction even long-term disability, and the life quality of the patient is seriously affected. As we know, the diagnosis and treatment of diseases are all the early discovery, early treatment and early recovery, so that how to diagnose the ICU-AW early is very important.

The currently commonly used diagnosis method of ICU-AW is a manual muscle force assessment method (MRC Score), which is mainly used for evaluating the muscle force of 6 pairs of muscle groups by 6 actions of lifting arms, flexing forearms, straightening wrists, flexing legs, straightening knee joints and flexing feet to the back side, wherein the muscle force of each muscle group is divided into 6 grades from 0-5. Wherein, grade 0-no muscle contraction; level 1-with muscle contraction but no joint movement; level 2-joint activity, but not against gravity; level 3-joint activity and ability to oppose gravity but not resistance; grade 4-against gravity and resistance, but not as good as normal muscle strength, grade 5-normal muscle strength. Muscle weakness is diagnosed when the total score is less than 48 points when the muscle forces of 6 pairs of muscle groups are added. This method lacks objectivity, is not accurate enough in the result of detection, and cannot monitor the change in muscle strength of the patient undergoing rescue treatment.

Those skilled in the art are therefore working to develop a test device which is accurate and can monitor the change in muscle strength of a patient undergoing a rescue treatment.

Disclosure of Invention

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a tester which has accurate detection results and can monitor the muscle strength change of a patient in rescue treatment.

In order to achieve the purpose, the invention provides a tester for testing the maximum isometrial force of quadriceps femoris, which comprises a base, wherein a force sensor and a fixed pulley are arranged on a bottom plate of the base, a tension-free belt is arranged on a metal rod of the force sensor, the metal rod points to the middle of the fixed pulley, the distance from the metal rod to the bottom plate is the same as the distance from the middle part of the fixed pulley to the bottom plate, the tension-free belt bypasses the fixed pulley, the data output end of the force sensor is connected with a signal converter, and the output end of the signal converter is connected with a terminal.

Preferably, the fixed pulley is fixed on the bottom plate of the base through a bracket.

Preferably, a plurality of groups of fixed pulley mounting holes are formed in the bottom plate, and convex strips are arranged on the outer side surfaces of the fixed pulley mounting holes.

Preferably, the end of the metal rod is provided with a through hole, and the front end of the tension-free strap passes through the through hole and is fixed by the first locking piece.

Preferably, the end of the tensionless strap is looped through the second locking member.

Preferably, the base is rectangular, and the side surface of the base is provided with a circuit through hole;

the base is provided with a cover body;

the edge of the side surface of the base is provided with a first half opening, the first half opening and the circuit through hole are positioned on the same side surface, and the cover body is provided with a second half opening corresponding to the first half opening.

A chair for testing the maximum isometric muscle strength of quadriceps femoris is characterized in that the tester for the maximum isometric muscle strength of quadriceps femoris is mounted on the support legs of the chair.

A testing bed for testing the maximum isometric muscle strength of quadriceps femoris is characterized in that the testing instrument for testing the maximum isometric muscle strength of quadriceps femoris is mounted on the support legs of the bed.

A method for testing the maximum isometric muscle strength of quadriceps femoris comprises the following steps:

the method comprises the following steps: the force sensor and the fixed pulley are fixed on the support leg of the bed or the chair, and the metal bar of the force sensor is ensured to point to the middle position of the fixed pulley,

step two: one end of a tension-free bridle is connected and fixed on the metal bar, and the other end of the tension-free bridle passes around the fixed pulley.

Further, the step one also comprises the following steps before: a base frame is arranged on the support legs of the bed or the chair, a base is arranged on the base frame, and the force sensor and the fixed pulley are both arranged on a bottom plate of the base.

According to the invention, the force sensor is matched with the fixed pulley, so that the maximum isometric muscle strength of the quadriceps femoris can be quantitatively measured, and compared with the traditional manual muscle strength evaluation method, the measurement result is more visual, accurate and objective; the device is convenient to detach and install, can be directly installed on a sickbed and a chair, is convenient to use, and only needs a patient to sit on the chair or lie on the bed during measurement, then the tension-free strap is sleeved on the ankle of the patient, the ankle exerts force towards the front, and the measured value during maximum force is the maximum isometric muscle force of the quadriceps femoris, so that the device can also monitor the change condition of the muscle force of the patient during rescue treatment.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is an external structural view of the present invention;

FIG. 3 is a schematic block diagram of the present invention;

FIG. 4 is an enlarged schematic view of FIG. 1 at F;

FIG. 5 is a schematic structural diagram of an embodiment of the present invention;

in the figure: 1-a base; 11-a base plate; 12-pulley mounting holes; 13-convex ribs; 14-a line via; 15-first half open pore;

2-a force sensor; 21-a metal rod;

3-fixed pulley; 4-a tension-free belt; 5-a signal converter; 6-a scaffold; 7-a first locking member; 8-a second lock;

9-a cover body; 91-second half open.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein the terms "upper", "lower", "left", "right", "inner", "outer", and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular manner, and thus should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

As shown in fig. 1 to 4, a force tester for maximal isometrial force of quadriceps femoris comprises a base 1, a force sensor 2 and a fixed pulley 3 are arranged on a bottom plate 11 of the base 1, preferably, the force sensor in the invention is a force sensor of HBM-S9M button type, a tension-free strap 4 is arranged on a metal rod 21 of the force sensor 2, the metal rod 21 points to the middle of the fixed pulley 3, the distance between the metal rod 21 and the bottom plate is the same as the distance between the middle of the fixed pulley 3 and the bottom plate, so as to ensure that the metal rod is subjected to vertical tension, and further ensure the reliability of detected data, the tension-free strap 4 passes around the fixed pulley 3, a signal converter 5 is connected to a data output end of the force sensor 2, an output end of the signal converter 5 is connected to a terminal, preferably, the signal converter in the invention adopts a signal of OM-CP-IFC200, the terminal is a common computer, and the four-limb restraint strap is a Jinyi kang brand four-limb restraint strap selected by a tension-free strap.

The fixed pulley 3 is fixed on the bottom plate of the base through the support 6, so that the gap between the fixed pulley and the bottom plate is increased, and the tension-free belt 4 can conveniently penetrate through the fixed pulley.

A plurality of groups of fixed pulley mounting holes 12 are formed in the bottom plate 11, and convex ribs 13 are arranged on the outer side surfaces of the fixed pulley mounting holes 12; through the arrangement of the pulley mounting hole 12, the distance between the pulley 3 and the force sensor can be adjusted, and the mounting position can be conveniently adjusted according to the actual use condition. In addition, the support is convenient to position through the arrangement of the convex ribs, so that the fixed pulley is more convenient to mount.

The tail end of the metal rod 21 is provided with a through hole, and the front end of the tension-free strap 4 passes through the through hole and is fixed through the first locking piece 7; therefore, the tension on the metal rod can be ensured to be vertical, the error of experimental data can be reduced, and the measured data is more accurate and reliable.

The tail end of the tension-free belt 4 is in a complete ring shape through the second locking piece 8, so that the tension-free belt is conveniently bound on the ankle of a patient, and the measurement is convenient; more preferably, a sleeve for wrapping the ankle can be arranged at the end of the tension-free belt 4, so as to improve the comfort of the patient during detection.

The base 1 is in a cuboid shape, and a line through hole 14 is formed in the side surface of the base 1, and a signal output end of the force sensor is connected with a terminal through a wire harness through the line through hole.

Preferably, the base 1 is provided with the cover 9, the edge of the side surface of the base 1 is provided with a first half opening 15, the first half opening and the circuit through hole are positioned on the same side surface, and the cover is provided with a second half opening corresponding to the first half opening; when the force sensor is not used, the wiring harness of the signal output end of the force sensor can be recovered into the base through the first half open hole and the second half open hole, and then the cover body is covered. This facilitates storage of the device when not in use.

When the device is used, the device is fixed on a sickbed or a seat, a patient holds the chest with both hands or sits or lies down when measuring, the ankle exerts force towards the front, the measured value when the patient is at the maximum force is the maximum muscle force of the quadriceps femoris, the metal rod generates strain when receiving the tensile force of the tension-free belt 4, electric quantity change is generated, the strain is converted into an electric signal through an OMEGA signal converter, the electric signal is output and displayed through the terminal, the patient is continuously measured for three times, and the average value of the electric signal is taken as the measured value.

The experiment carried out by the invention is verified to be divided into two groups, wherein the first group is an experimental group, the second group is a control group, the specific experimental data is shown in the following table, wherein table 1 shows the experimental base data, and table 2 shows the data obtained after the experiment persons who use the invention to carry out the measurement on table 1.

TABLE 1 Subjects number statistics (Table 1 Subject demographics)

TABLE 2-experimenter of TABLE 1 measures quadriceps femoris data using the apparatus of the present invention

Table 1 shows baseline data indicating that the experimental and control groups are homogeneous and comparable. The measurement data in table 2 show that the experimental group data is significantly lower than the control group, the present invention can determine the difference between the patient and the normal person, and the measurement data is accurate.

Example 2

Example 3

As shown in fig. 5, the maximum equal-length muscle strength test bed for the quadriceps femoris is characterized in that the maximum equal-length muscle strength test instrument for the quadriceps femoris is mounted on the legs of the bed.

Example 4

the method comprises the following steps: the force sensor 2 and the fixed pulley 3 are both fixed on the support leg of the bed or the chair, and the metal bar 21 of the force sensor 2 is ensured to point to the middle position of the fixed pulley 3,

step two: one end of a tension-free belt 4 is connected and fixed on the metal bar 21, and the other end of the tension-free belt passes around the fixed pulley 3.

More preferably, the step one is preceded by the steps of: a base frame is arranged on a support leg of a bed or a chair, a base is arranged on the base frame, and a force sensor 2 and a fixed pulley 3 are both arranged on a bottom plate of the base 1. The force sensor and the fixed pulley are mounted on a bed or a chair according to the actual measurement requirement, and the measurement applicability is improved.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a biggest isometrius force tester of quadriceps femoris, characterized by: the device comprises a base (1), wherein a bottom plate (11) of the base (1) is provided with a force sensor (2) and a fixed pulley (3); a tension-free bridle (4) is arranged on a metal bar (21) of the force sensor (2); the metal bar (21) points to the middle of the fixed pulley (3), and the distance from the metal bar (21) to the bottom plate is the same as the distance from the middle part of the fixed pulley (3) to the bottom plate; the tension-free belt (4) is wound around the fixed pulley (3); the data output end of the force sensor (2) is connected with a signal converter (5); the output end of the signal converter (5) is connected with a terminal.

2. The tester for maximum isometrial force of quadriceps femoris as claimed in claim 1, wherein: the fixed pulley (3) is fixed on the bottom plate of the base through a support (6).

3. The tester for maximum isometrial force of quadriceps femoris as claimed in claim 2, wherein: a plurality of groups of fixed pulley mounting holes (12) are formed in the bottom plate (11); and a convex rib (13) is arranged on the outer side surface of the fixed pulley mounting hole (12).

4. The tester for maximum isometrial force of quadriceps femoris as claimed in claim 2, wherein: the tail end of the metal rod (21) is provided with a through hole, and the front end of the tension-free binding band (4) penetrates through the through hole and is fixed through a first locking piece (7).

5. The tester for maximum isometrial force of quadriceps femoris as claimed in claim 2, wherein: the tail end of the tension-free belt (4) forms a loop shape through a second locking piece (8).

6. The tester for maximum isometrial force of quadriceps femoris as claimed in claim 2, wherein: the base (1) is in a cuboid shape, and a circuit through hole (14) is formed in the side face of the base (1);

the base (1) is provided with a cover body (9);

a first half opening hole (15) is formed in the edge of the side face of the base (1), and the first half opening hole and the circuit through hole are located on the same side face; the cover body is provided with a second half opening corresponding to the first half opening.

7. The utility model provides a maximum isometric muscle strength test chair of quadriceps femoris, characterized by: the tester for testing the maximum isometrial force of quadriceps femoris according to any one of claims 1 to 6 is mounted on the legs of the chair.

8. The utility model provides a maximum isometric muscle strength test bed of quadriceps femoris, characterized by: the tester for maximum isometrial force of quadriceps femoris according to any one of claims 1 to 6 is mounted on the legs of the bed.

9. A method for testing the maximum isometric muscle strength of quadriceps femoris is characterized by comprising the following steps of: the method comprises the following steps:

the method comprises the following steps: fixing a force sensor (2) and a fixed pulley (3) on a support leg of a bed or a chair, and ensuring that a metal rod (21) of the force sensor (2) points to the middle position of the fixed pulley (3);

step two: one end of a tension-free bridle (4) is connected and fixed on the metal bar (21), and the other end of the tension-free bridle bypasses the fixed pulley (3).

10. The method for testing maximum isometric muscle strength of quadriceps femoris as claimed in claim 9, wherein the method comprises the following steps: the first step also comprises the following steps: a base frame is arranged on a support leg of a bed or a chair, a base is arranged on the base frame, and a force sensor (2) and a fixed pulley (3) are both arranged on a bottom plate of the base (1).