CN110897609B - Pain sense testing device with combined stimulation - Google Patents

Abstract

The invention discloses a pain test device for combined stimulation, and relates to the technical field of medical devices. A joint stimulation pain test device, including a shell, a pain measuring needle, a return spring, a limiting inner cylinder, a sliding core cylinder and an electric stimulator. The electric stimulator is connected to a trigger switch, and the front end of the limiting inner cylinder forms the sliding The limit part of the core cylinder; the trigger switch is used to press the electric stimulator, and the electric stimulator pushes the sliding core cylinder to move in the limit inner cylinder, thereby driving the pain measuring needle to extend from the front opening to physically stimulate the subject to be measured, and Compress the return spring; after the sliding core cylinder reaches the limit part in the limit inner cylinder, the electric stimulator starts to generate high-voltage and low-current electronic pulses and transmits them to the pain measuring needle through the conductor for electrical stimulation of the object to be measured. The present invention realizes the combined stimulation of mechanical stimulation and electrical stimulation, can more comprehensively evaluate the patient's sensitivity to pain, and has a wider application range.

Description

Combined stimulation pain test device

Technical field

The present invention relates to the technical field of medical devices.

Background technique

Human anesthesia is a reversible functional suppression of the central nervous system and/or peripheral nervous system produced by drugs or other methods. This suppression is mainly characterized by the loss of sensation, especially pain.

Due to individual differences in pain sensitivity among anesthetized persons, there are great individual differences in preoperative anesthetic dosage, post-anesthetic onset time, and postoperative analgesic dosage. Anesthesiologists can usually use methods such as needle sticks and hand pinches to evaluate patients. Because pain is a subjective feeling of clinical patients and it is difficult to quantify it objectively. Currently, some scales are still used to evaluate patients based on their chief complaints, such as language evaluation. Scale (VRS), etc., and then the doctor uses medication based on experience. However, the above methods are too subjective to the patient's pain stimulation, and the testing process is not repeatable or reproducible. Moreover, the dosage accuracy of the test conclusions based on the subjective test method is poor, and the dosage needs to be adjusted based on the patient's actual feelings during the anesthetic drug infusion process, which is too painful for the patient.

There are also various pain measurement devices in the existing technology, and their testing principles are mainly divided into two categories: electrical stimulation and mechanical stimulation: electrical stimulation mainly uses electric current to simulate mechanical stimulation to quantitatively test sensitivity; mechanical stimulation uses sharp objects to stimulate the patient's skin. , quantitatively testing sensitivity through applied pressure. However, in actual operations, it was found that it is difficult to comprehensively assess a patient's sensitivity to pain using electrical stimulation or mechanical stimulation alone, because the human body has different sensitivity to the two stimulation methods.

How to more comprehensively assess patients' sensitivity to pain and improve the scope of application of pain measuring devices is an urgent problem that needs to be solved.

Contents of the invention

The object of the present invention is to overcome the shortcomings of the prior art and provide a pain test device for combined stimulation. The present invention realizes the combined stimulation of mechanical stimulation and electrical stimulation, can more comprehensively evaluate the patient's sensitivity to pain, and has a wider application range.

In order to achieve the above goals, the present invention provides the following technical solutions:

A pain test device for combined stimulation, including a shell; the shell forms a cavity, and the cavity is provided with a front end opening and a rear end opening; the cavity is provided with a pain measuring needle, a return spring, a limiting inner cylinder, A sliding core cylinder and an electric stimulator, the electric stimulator is connected to a trigger switch, and the electric stimulator can generate high voltage and low current electronic pulses under a preset pressure; the front end of the limiting inner cylinder forms the sliding core cylinder The limit part;

The pain measuring needle is fixedly installed on the front end of the sliding core cylinder and is electrically connected to the electric stimulator through a conductor; the sliding core cylinder is installed in the limiting inner cylinder through a return spring, and the electric stimulator is installed on the sliding core through a mounting plate. In the barrel, the trigger switch is connected to the electric stimulator through the aforementioned rear end opening;

The trigger switch is used to press the electric stimulator, and push the sliding core cylinder to move in the limiting inner cylinder through the electric stimulator, thereby driving the pain measuring needle to extend from the front opening to physically stimulate the object to be measured and compress the return spring; After the sliding core cylinder reaches the limit part in the limit inner cylinder, the electric stimulator starts to generate high voltage and low current electronic pulses and transmits them to the pain measuring needle through the conductor for electrical stimulation of the object to be measured.

Furthermore, a limit controller is provided at the rear end of the limiting inner cylinder, and the limit controller is used to control the position of the limiting inner cylinder within the housing, thereby controlling the extension length of the pain measuring needle relative to the front end opening.

Further, the limit controller and the limit inner cylinder are movably connected through threads, and the distance between the limit controller and the limit inner cylinder is adjusted through the threads to adjust the position of the limit inner cylinder in the housing.

Further, the rear end of the limiting inner cylinder is provided with an external thread, and the front end of the limiting controller is provided with an internal thread matching the aforementioned external thread, and the position of the limiting inner cylinder is adjusted by forward and reverse rotation; The controller is also provided with a through hole for the trigger switch to pass through.

Further, the trigger switch has a T-shaped structure, including a pressing rod that can pass through the rear end opening and a pressing head that cannot pass through the rear end opening. The front end of the pressing rod is connected to the electric stimulator, and the rear end of the pressing rod is connected to the pressing head for supplying electricity. User presses.

Further, after the test is completed, the return spring returns, and the sliding core moves to the rear end under the action of the return spring, thereby driving the pain measuring needle to retract into the cavity.

Further, the conductor includes a front-end curved portion, a main straight rod portion and a rear-end curved portion, the front-end curved portion is fixedly connected to the tail of the pain measuring needle, and the rear-end curved portion is fixedly connected to the current output end of the electric stimulator, The mounting plate is provided with holes or slots for the straight rod portion of the main body to pass.

Further, the housing is designed in a pen shape, including a pen tip part and a pen barrel part, the front end opening is located on the pen tip part, and the rear end opening is located on the pen barrel part.

Furthermore, the pain measuring needle is made of conductive material and has a pointed structure.

Further, the electrical stimulator is a piezoelectric generator.

Because the present invention adopts the above technical solution, compared with the existing technology, as an example, it has the following advantages and positive effects: on the one hand, it realizes the combined stimulation of mechanical stimulation and electrical stimulation, and can more comprehensively evaluate the patient's sensitivity to pain. On the other hand, the intensity of mechanical stimulation can also be easily adjusted quantitatively, and the operator can adjust it according to different users, which improves the applicable scope of the pain testing device.

Description of the drawings

Figure 1 is a schematic three-dimensional structural diagram of a pain testing device provided by an embodiment of the present invention.

Figure 2 is a schematic cross-sectional structural diagram of a pain testing device provided by an embodiment of the present invention.

Figure 3 is a schematic structural diagram of a housing provided by an embodiment of the present invention.

Figure 4 is a schematic diagram of the connection between the limiting inner cylinder and the limiting controller provided by the embodiment of the present invention.

Figure 5 is a schematic diagram of the electrical connection between the pain measuring needle and the electric stimulator provided by the embodiment of the present invention.

Figure 6 is a schematic diagram of the connection between the sliding core barrel and the return spring provided by the embodiment of the present invention.

Explanation of reference symbols:

Pain test device 100;

Shell 110, cavity 111, pen barrel cavity 111a, pen tip cavity 111b, front end opening 112, rear end opening 113;

Pain measuring needle 120;

return spring 130;

Limiting inner cylinder 140, external thread 141, front end through hole 142, rear end through hole 143;

Sliding core 150, mounting plate 151, end plate 152, front through hole 153, rear through hole 154;

Electric stimulator 160, fixed part 161, pressure rod part 162;

Limit controller 170, internal thread 171, through hole 172;

Trigger switch 180;

Conductor 190, front-end curved portion 191, main body straight rod portion 192, rear-end curved portion 193.

Detailed ways

The combined stimulation pain test device disclosed in the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered isolated, and they can be combined with each other to achieve better technical effects. In the drawings of the following embodiments, the same reference numerals appearing in each drawing represent the same features or components and can be applied to different embodiments. Thus, once an item is defined in one figure, it does not need further discussion in subsequent figures.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification and are for the understanding and reading of people familiar with this technology. They are not used to limit the scope of the invention. Any structural modifications, changes in proportions, or adjustments in size, as long as they do not affect the effects that the invention can produce and the purposes that it can achieve, should fall within the scope of the technical content disclosed by the invention. within the range. The scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed out of the order described or discussed, including in a substantially simultaneous manner or in the reverse order depending on the functionality involved, which should be considered herein. The embodiments of the invention are understood by those skilled in the art to which the embodiments of the invention belong.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the authorized specification. In all examples shown and discussed herein, any specific values are to be construed as illustrative only and not as limiting. Accordingly, other examples of the exemplary embodiments may have different values.

Example

Refer to Figures 1 and 2, which are schematic structural diagrams of a combined stimulation pain testing device provided by an embodiment of the present invention.

The pain testing device 100 includes a shell 110, a pain measuring needle 120, a return spring 130, a limiting inner cylinder 140, a sliding core 150, an electric stimulator 160, a limit controller 170, and a trigger switch 180.

The housing 110 is designed in a pen shape and includes a pen tip part and a pen barrel part. In this embodiment, as a typical preferred structure, the pen tip part adopts a triangular cone structure, and the pen barrel part adopts a cylindrical structure. The pen tip part and the pen barrel part can be integrally formed, or they can be made separately and then assembled.

The housing 110 forms a cavity 111 , and the cavity 111 is provided with a front opening 112 and a rear opening 113 .

Referring to Figure 3, the specific structure of the housing 110 is illustrated: due to the difference between the pen tip part and the pen barrel part, the cavity 111 includes a pen barrel part cavity 111a and a pen tip part cavity 111b, and the front end opening 112 is located at the pen tip part. At the front end, the rear end opening 113 is located at the rear end of the pen barrel.

The cavity 111 is provided with a pain measuring needle 120, a return spring 130, a limiting inner cylinder 140, a sliding core cylinder 150 and an electric stimulator 160. Among them, the main bodies of the pain measuring needle 120 and the return spring 130 are located in the pen tip cavity 111b; the limiting inner barrel 140, the sliding core barrel 150 and the electric stimulator 160 are located in the pen barrel cavity 111a.

Continuing to refer to FIG. 1 , the electrical stimulator 160 is connected to the trigger switch 180 , and the electrical stimulator 160 can generate high voltage and low current electronic pulses under a preset pressure. In this embodiment, the trigger switch 180 is a push switch and adopts a T-shaped structure. Specifically, the trigger switch 180 may include a pressing rod that can pass through the rear end opening 113 and a pressing head that cannot pass through the rear end opening 113. The front end of the pressing rod is connected to the electric stimulator 160, and the rear end of the pressing rod is connected to the pressing head for the user. Press.

The sliding core cylinder 150 can move within the limiting inner cylinder 140 . In this embodiment, the front end of the limiting inner cylinder 140 forms a limiting portion of the sliding core cylinder 150 , and the limiting portion is used to limit the sliding core cylinder 150 from continuing to move within the limiting inner cylinder 140 . As an example but not a limitation, the limiting part may be a limiting block (protrusion) or a limiting plate protruding on the inner wall of the limiting inner cylinder 140. When the sliding core cylinder 150 moves to the limiting block (protrusion) ) or the position of the limiting plate, due to the existence of the limiting block (protrusion) or the limiting plate, the sliding core 150 cannot continue to move, thereby achieving the limiting effect on the sliding core 150 .

The pain measuring needle 120 is fixedly installed on the front end of the sliding core barrel 150 and is electrically connected to the electric stimulator 160 through the conductor 190 .

At the same time, the sliding core cylinder 150 is installed in the limiting inner cylinder 140 through the return spring 130, the electric stimulator 160 is installed in the sliding core cylinder 150 through the mounting plate, and the trigger switch 180 passes through the rear end opening and connects to the electric stimulator 160 connect.

In this embodiment, the pain measuring needle is a structure with a tip made of conductive material.

During operation, the trigger switch 180 is used to press the electric stimulator 160 to apply thrust, and the electric stimulator 160 pushes the sliding core cylinder 150 to move in the limiting inner cylinder 140, thereby driving the pain measuring needle 120 to extend from the front end opening 112, thereby During the physical stimulation of the object to be tested, the return spring changes from a diastolic state to a compressed state. Continuing to press, after the sliding core cylinder 150 reaches the limiting position in the limiting inner cylinder 140, since the sliding core cylinder 150 is limited and cannot move forward, the pressing force is applied to the electric stimulator to start the electric stimulator. After the electric stimulator is activated, it can generate high voltage and low current electronic pulses and transmit them to the pain measuring needle 120 through the conductor 190, thereby electrically stimulating the object to be measured. After the test is completed, the pressing force is removed, the return spring returns to the diastolic state, and the sliding core moves to the rear end under the action of the return spring, thereby driving the pain measuring needle to retract into the cavity 111.

In this embodiment, a limit controller 170 is also provided at the rear end of the limiting inner cylinder 140. The limit controller 170 is used to control the position of the limiting inner cylinder in the housing 110, thereby controlling the relative position of the pain measuring needle. The extended length of the front opening. That is, the position of the limiting inner cylinder 140 in the housing 110 can be adjusted by the limiting controller 170 .

Preferably, the limit controller 170 is movably connected to the limit inner cylinder 140 through threads. During operation, the distance between the limit controller 170 and the limiting inner cylinder 140 is adjusted through threads to adjust the position of the limiting inner cylinder 140 in the cavity of the housing 110 .

Specifically, as shown in Figure 4, the limiting inner cylinder 140 includes a cavity for the sliding core cylinder 150 to move. The rear end of the limiting inner cylinder 140 is provided with an external thread 141, and the front end of the limiting inner cylinder 140 is provided with an external thread 141. The front end through hole 142 for the return spring 130 to pass through, and the rear end of the limiting inner cylinder 140 is provided with a rear end through hole 143 for the trigger switch 180 to pass through.

The front end of the limit controller 170 is provided with an internal thread 171 that matches the aforementioned external thread 141 , and the rear end of the limit controller 170 is provided with a through hole 172 for the trigger switch 180 to pass through.

At the same time, corresponding to the cylinder wall of the limiting inner cylinder 140, the limiting controller 170 is provided with an adjustment cavity to accommodate the precessed limiting inner cylinder wall. As an example of a typical method, it will be described with reference to Figure 4: the limit controller 170 includes an outer wall, an inner wall, and a side wall connecting the outer wall and the inner wall. The outer wall is longer than the inner wall, and an annular adjustment chamber is formed through the outer wall, the inner wall, and the side wall. A through hole 172 is formed in the inner wall. An internal thread 171 is provided at the front end of the outer wall.

When the user rotates the limit controller 170 in the forward direction, the inner limit cylinder 140 screws into the adjustment chamber under the action of the thread, and the inner limit cylinder 140 moves to the rear end in the housing 110, causing the sliding core cylinder 150 to move. The cavity space is shortened, thereby reducing the extension length of the pain measuring needle.

In contrast, when the user rotates the limit controller 170 in the reverse direction, the inner limit cylinder 140 is screwed out of the adjustment chamber under the action of the thread, and the inner limit cylinder 140 moves toward the front end in the housing 110, causing the sliding core cylinder The cavity space that 150 can move becomes longer, thereby increasing the extension length of the pain measuring needle.

As shown in FIG. 5 , the pain measuring needle 120 is electrically connected to the electrical stimulator 160 through the conductor 190 . Specifically, the conductor 190 may include a front-end curved portion 191, a main straight rod portion 192, and a rear-end curved portion 193. The front-end curved portion 191 is fixedly connected to the tail of the pain measuring needle 120, and the rear-end curved portion 193 is connected to the electrical conductor. The current output terminal of the stimulator 160 is fixedly connected.

Furthermore, in order to reduce the influence of the mounting plate 151 corresponding to the electric stimulator 160 on the main body straight rod portion 192, the mounting plate 151 may also be provided with a hole or a slot for the main body straight rod portion 192 to pass.

As shown in FIG. 6 , the mounting plate 151 is fixedly disposed in the cavity of the sliding core 150 to fixedly install the electric stimulator 160 in the sliding core 150 . At the same time, the front end of the sliding core cylinder 150 is installed in the limiting inner cylinder 140 through the return spring 130. The deformation characteristics of the return spring 130 can be used to control the sliding core cylinder 150 to move in the limiting inner cylinder 140, thus driving the fixed installation. The pain measuring needle on the end plate 152 of the sliding core 150 moves and resets (retracts into the cavity 111).

The pain measuring needle 110 can be directly fixed on the end plate 152 through welding or snap connection; the pain measuring needle 110 can also be fixed by providing a front through hole 153 on the end plate 152, as shown in Figure 6 .

The sliding core 150 is also provided with a rear end through hole 154 through which the power stimulator 160 passes. In this embodiment, the electrical stimulator is preferably a piezoelectric generator, which uses the piezoelectric phenomenon generated by mechanical deformation of the crystal to achieve high voltage and low current electronic pulses.

Specifically, the piezoelectric generator may include a fixing part 161 and a pressure rod part 162 (see FIG. 5 ). The fixing part 161 is fixedly installed on the mounting plate 151 . The fixed part 161 is provided with a piezoelectric ceramic crystal and a spring, and the pressure rod part 162 is provided with an impactor and a spring. The process of the piezoelectric generator generating electronic pulses is as follows: the pressure rod part of the piezoelectric generator is driven forward by the trigger switch. displacement, the impactor quickly hits the piezoelectric ceramic crystal in the fixed part under the push of the spring in the pressure rod part, causing it to deform and generate an electric current; after the external force is removed, the pressure rod part returns to its normal state under the push of the spring in the fixed part. The working principle is the same as that of the existing piezoelectric ceramic lighter igniter, and will not be described in detail here.

During the impact process, the length of time depends on the elastic coefficient and deformation amount of the spring in the pressure rod part, and the magnitude of the generated electronic pulse voltage and current depends on the mechanoelectric conversion coefficient of the piezoelectric ceramic crystal.

In the above description, the disclosure of the invention is not intended to limit itself to these aspects. Rather, the components may be selectively and operatively combined in any number within the intended scope of the present disclosure. In addition, terms like "includes," "includes," and "having" should be construed as inclusive or open by default, rather than exclusive or closed, unless expressly qualified to the contrary. All technical, scientific or other terms have the same meaning as understood by those skilled in the art unless limited to a contrary meaning. Common terms found in dictionaries should not be interpreted too ideally or too impractically in the context of the relevant technical documentation, unless the present disclosure explicitly limits them to that. Any changes or modifications made by those of ordinary skill in the field of the present invention based on the above disclosure shall fall within the protection scope of the claims.

Claims (10)

1. A combined stimulation pain test device, comprising a shell, characterized in that: the shell forms a cavity, the cavity is provided with a front end opening and a rear end opening, and a pain measuring needle and a return spring are provided in the cavity. , a limiting inner cylinder, a sliding core cylinder and an electric stimulator, the electric stimulator is connected to a trigger switch, and the electric stimulator can generate high voltage and low current electronic pulses under a preset pressure; the front end of the limiting inner cylinder Form the limiting portion of the sliding core barrel; The pain measuring needle is fixedly installed on the front end of the sliding core cylinder and is electrically connected to the electric stimulator through a conductor; the sliding core cylinder is installed in the limiting inner cylinder through a return spring, and the electric stimulator is installed on the sliding core through a mounting plate. In the barrel, the trigger switch is connected to the electric stimulator through the aforementioned rear end opening; The trigger switch is used to press the electric stimulator, and the electric stimulator pushes the sliding core cylinder to move in the limiting inner cylinder, thereby driving the pain measuring needle to extend from the front opening to physically stimulate the object to be measured. At this time, the return spring is Compression; after the sliding core cylinder reaches the limit part in the limit inner cylinder, the electric stimulator starts to generate high voltage and low current electronic pulses and transmits them to the pain measuring needle through the conductor for electrical stimulation of the object to be measured. 2. The pain test device according to claim 1, characterized in that: a limit controller is provided at the rear end of the limit inner cylinder, and the limit controller is used to control the position of the limit inner cylinder in the outer shell. Thereby controlling the extension length of the pain measuring needle relative to the front end opening. 3. The pain test device according to claim 2, characterized in that: the limit controller and the limit inner cylinder are movably connected through threads, and the distance between the limit controller and the limit inner cylinder is adjusted through the threads. Adjust the position of the limiting inner cylinder in the housing. 4. The pain testing device according to claim 3, characterized in that: the rear end of the limiting inner cylinder is provided with an external thread, and the front end of the limit controller is provided with an internal thread matching the aforementioned external thread. Anti-rotation adjusts the position of the limit inner cylinder; the limit controller is also provided with a through hole for the trigger switch to pass through. 5. The pain testing device according to claim 1, characterized in that: the trigger switch has a T-shaped structure and includes a pressing rod that can pass through the rear end opening and a pressing head that cannot pass through the rear end opening. The front end of the pressing rod Connected to the electric stimulator, the rear end of the pressing rod is connected to a pressing head for the user to press. 6. The pain testing device according to claim 1, characterized in that: after the test is completed, the return spring is reset, and the sliding core moves to the rear end under the action of the return spring, thereby driving the pain measuring needle to retract into the cavity. in vivo. 7. The pain testing device according to claim 1, characterized in that: the conductor includes a front-end curved portion, a main body straight rod portion and a rear-end curved portion, the front-end curved portion is fixedly connected to the tail of the pain measuring needle, and the The rear end curved part is fixedly connected to the current output end of the electric stimulator, and the mounting plate is provided with a hole or a slot for the straight rod part of the main body to pass through. 8. The pain testing device according to claim 1, characterized in that: the shell is designed in a pen shape and includes a pen tip part and a pen barrel part, the front end opening is located on the pen tip part, and the rear end opening is located on the pen barrel part. . 9. The pain testing device according to claim 1, wherein the pain measuring needle is a structure with a tip made of conductive material. 10. The pain testing device according to claim 1, wherein the electrical stimulator is a piezoelectric generator.