CN209770415U - cornea thickness and anterior chamber depth measurer - Google Patents

Abstract

the utility model discloses a cornea thickness and anterior chamber depth measurer. The measurer at least comprises an ultrasonic transmitting unit with a shell, wherein the ultrasonic transmitting unit comprises a measuring probe and an ultrasonic transducer which is used for transmitting and/or receiving ultrasonic signals and is connected to the inside of the measuring probe in a moving mode, the measuring probe is rotatably connected with the ultrasonic transmitting unit in a hinged mode, the measuring probe is rotatably connected with a connecting rod connected with a turntable in a hinged mode, the turntable is fixedly connected to an output shaft of a motor, and the motor is fixedly connected to the inner wall of the shell of the ultrasonic transmitting unit. The motor drives the measuring probe to realize multi-angle measurement of eye tissues, and system errors of the results of obtaining the corneal thickness and the anterior chamber depth by a single point are effectively reduced. The device is particularly suitable for the statistics of pathological data of the corneal thickness and the anterior chamber depth, and provides a necessary medical instrument for researching the relation between ophthalmic diseases and the corneal thickness and the anterior chamber depth.

Description

Cornea thickness and anterior chamber depth measurer

Technical Field

The invention relates to the field of ophthalmic medical instruments, in particular to a cornea thickness and anterior chamber depth measurer.

Background

In ophthalmology, various ophthalmic diseases such as vitreous body, retinal diseases, ocular optics, glaucoma, optic neuropathy, cataract and the like are generally researched. Among them, corneal thickness and anterior chamber depth are important in guiding clinical work in various ophthalmic diseases such as keratopathy, tonometry, glaucoma, ametropia, cataract, retina and other diseases. The cornea is a transparent film on the front wall of the eyeball, the thickness of the cornea is different from part to part, the central part is the thinnest, the thickness is 0.5-0.57mm, and the peripheral part can reach 1 mm. The anterior chamber is the cavity between the back of the cornea and the iris and lens, and has a thickness of 2.5-3 mm.

The ultrasonic thickness measuring technology comprises the following steps: the time interval between the transmit pulse and the echo pulse is directly related to the thickness of the medium, given the constant propagation speed of the ultrasonic wave in the medium.

For example, chinese utility model patent publication No. CN205144603U discloses a wearable device for eye axis detection. The device comprises a corneal contact lens, an ultrasonic transmitting module, an ultrasonic receiving module, a communication module and a central processing unit, wherein the ultrasonic transmitting module, the ultrasonic receiving module and the communication module are attached to the inner surface layer of the corneal contact module, and the ultrasonic transmitting module and the ultrasonic receiving module are symmetrically arranged relative to the axis of the eye. The central processing unit controls the ultrasonic wave sending module to send and stop the ultrasonic waves; the ultrasonic transmitting module transmits ultrasonic waves to the eyeground, the ultrasonic receiving module receives the ultrasonic waves after the eyeground is reflected, and therefore the communication module obtains the time from the transmission of the ultrasonic waves to the reflection of the ultrasonic waves by the bottom of the eye axis and transmits the ultrasonic waves to the central processing unit; and the central processing unit analyzes and processes the data transmitted by the communication module to obtain a final result of the eye axis length. The utility model discloses a through the mode of blinking, can the automatic alignment measurement center, through central processing unit's mode, controlgear begins and ends for the user can be under the condition of no other people's help, alone accomplish whole measurement process, and do not need corresponding medical knowledge. The utility model has simple equipment and convenient operation; can complete the work without the guidance of a doctor, and brings great convenience to a user.

for example, chinese patent publication No. CN201743710U discloses an ultrasonic probe with an adjustable light source. It includes a probe housing, a fan or linear swept ultrasound transducer. The lower part of the shell of the probe is connected with at least one adjustable light source, the upper part of the shell of the probe is connected with a knob, the power line of each adjustable light source is respectively connected with the knob in series, and the power line of each adjustable light source is wound in a probe cable and is connected into an ultrasonic probe control circuit. The adjustable light source is arranged in a light source groove at the lower part of the probe shell, or the lower part of the probe shell is connected with a rigid frame, and the adjustable light source is fixed on the rigid frame.

For example, chinese patent publication No. CN202020457U discloses an ultrasonic ophthalmic measurement apparatus. The measuring device comprises an ultrasonic transducer, a control unit, an ultrasonic transmitting unit, an ultrasonic receiving unit, a data acquisition unit and a key unit. The control unit comprises an MSP430 singlechip and a CPLD chip which are connected with each other; the input end of the ultrasonic transmitting unit is connected with the output end of the CPLD chip, and the output end of the ultrasonic transmitting unit is connected with the insufficient ultrasonic transducer; the input end of the ultrasonic receiving unit is connected with the ultrasonic transducer, and the output end of the ultrasonic receiving unit is connected with the CPLD chip; the data acquisition unit comprises a filter circuit, an A/D conversion circuit and an FPGA chip which are sequentially connected, the input of the filter circuit is connected with the output of the ultrasonic receiving unit, and the output end of the FPGA chip is connected with the input end of the MSP430 singlechip; the display unit is connected with the output end of the MSP430 singlechip, and the key unit is connected with the water end of the MSP430 singlechip. The utility model discloses a for improve measurement accuracy, adopt differential circuit to reduce the transmission pulse width. For example, chinese patent publication No. CN102599939B discloses a corneal thickness measuring method based on a pulse subdivision method. The method comprises the following steps: the phase adjusting unit outputs a signal with the frequency of the center frequency of the probe and the phase of 0 under the action of the control unit; the signal output by the phase adjusting unit is added to the ultrasonic transducer through the transmitting part, and the echo signal is processed by the control unit after amplification, filtering and A/D conversion. The control unit is the core of the system, and is responsible for controlling the phase adjustment unit and receiving the A/D converted data besides the functions of realizing interaction with the data structure, receiving the instruction of the input unit, outputting display information and the like. The whole process control of ultrasonic thickness measurement is also completed in the control unit.

However, the corneal thickness and the anterior chamber depth are not the same since the eye tissue is at different detection locations. The utility model measures the fault of the eye tissue structure by fixed point and fixed angle to obtain the cornea thickness and the anterior chamber depth, and the data obtained in this way has systematic error. Therefore, a multi-angle cornea thickness and anterior chamber depth measuring device is very urgent for the diagnosis of eye diseases and the statistics of critical position data of eyeball tissues.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a cornea thickness and anterior chamber depth measuring device. The measuring device at least comprises an ultrasonic transmitting unit with a shell, wherein the ultrasonic transmitting unit comprises a measuring probe and an ultrasonic transducer which is used for transmitting and/or receiving ultrasonic signals and is movably connected to the inside of the measuring probe; the measuring probe is connected with the outer wall of the ultrasonic transmitting unit in a hinged mode in a rotatable mode, the measuring probe is connected with the connecting rod in a rotatable mode, the connecting rod is connected with the rotary table in a hinged mode, the rotary table is fixedly connected to an output shaft of the motor, and the motor is fixedly connected to the inner wall of the shell.

according to a preferred embodiment, the outer wall of the housing is detachably fixedly connected to one end of an elastic support frame, and the other end of the elastic support frame is connected to the measuring probe through a hinge, so that the measuring probe is rotatably connected to the ultrasonic emission unit.

According to a preferred embodiment, the ultrasonic wave transmitting unit further comprises a differentiating unit including a differentiating circuit for waveform conversion and a field effect switch; when the field effect switch is conducted, the differentiating unit is conducted with the ultrasonic transducer through a differentiating circuit to generate ultrasonic waves; when the field effect switch is turned off, the differentiating unit is not conducted with the ultrasonic transducer, and no ultrasonic wave is generated.

according to a preferred embodiment, the measuring device further comprises an ultrasonic data acquisition unit connected to the output of the ultrasonic transducer, the ultrasonic data acquisition unit comprising an amplifier for gain, a filter for noise cancellation and an a/D converter for converting the acoustic signal into a digital signal; wherein the amplifier is connected to the A/D converter through the filter.

According to a preferred embodiment, the output end of the ultrasonic data acquisition unit is connected with the central processing unit; the central processing unit comprises a memory and a chip, wherein the chip is in bidirectional connection with the memory through a communication unit; and the input end of the memory is connected with the output end buffer of the A/D converter. The communication unit is one or more of optical fiber, WIFI and Bluetooth.

According to a preferred embodiment, the output of the chip is connected to the electric motor via the communication unit.

According to a preferred embodiment, the central processing unit is connected with a display unit, the display unit comprises a liquid crystal display screen and a key unit, wherein the input end of the liquid crystal display screen is connected with the output end of the chip through the communication unit; the output end of the key unit is connected with the input end of the chip through the communication unit.

According to a preferred embodiment, the measuring device further comprises a counter, an input end of which is connected to an output end of the comparison circuit, wherein an output end of the counter is connected to the chip through the communication unit; and the input end of the comparison circuit is connected with the output end of the amplification circuit.

According to a preferred embodiment, the ultrasonic transducer is connected with the measuring probe through a sliding rail mechanism; at least two visible light sources symmetrically arranged along the axial line of the ultrasonic transducer are fixed on the outer wall of the ultrasonic transducer.

According to a preferred embodiment, the outer wall of the housing is provided with an anti-slip layer consisting of at least one anti-slip block, wherein the at least one anti-slip block is distributed on the outer wall of the housing in an array manner, or the at least one anti-slip block is distributed on the outer wall of the housing symmetrically with the central axis of the ultrasonic wave emitting unit as the center.

according to a preferred embodiment, the measuring probe is detachably connected to a bowl-shaped eye cup whose outer wall has scale values.

The utility model provides a novel cornea thickness and anterior chamber depth caliber that provides of this concrete advantage has:

(1) The motor drives the measuring probe to realize the measurement of the multi-angle eye tissue, and the system error of the result of obtaining the corneal thickness and the anterior chamber depth by a single point is effectively reduced;

(2) The device is particularly suitable for the statistics of pathological data of the corneal thickness and the anterior chamber depth, and provides a necessary medical instrument for researching the relation between ophthalmic diseases and the corneal thickness and the anterior chamber depth.

(3) The elastic support frame effectively reduces the extrusion of the measuring probe to the eyes, reduces the damage of the measurer to the eyes on one hand, and improves the accuracy of measured data on the other hand.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of an ultrasonic transmitter unit of a corneal thickness and anterior chamber depth measuring device provided by the present invention; and

Fig. 2 is a schematic diagram of a logic module structure of a corneal thickness and anterior chamber depth measuring device provided by the present invention.

List of reference numerals

1: the ultrasonic wave transmitting unit 106: rotary disc

2: the ultrasonic data acquisition unit 107: elastic support frame

3: the central processing unit 108: shell body

4: the display unit 201: amplifier with a high-frequency amplifier

5: the buffer 202: filter with a filter element having a plurality of filter elements

6: counter 203: A/D converter

101: the measurement probe 301: memory device

102: the ultrasonic transducer 302: chip and method for manufacturing the same

103: the differentiating circuit 401: liquid crystal display screen

104: field-effect switch 402: key unit

105: the motor 402: key unit

Detailed Description

The following detailed description is made with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "inner", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

in the present invention, the term "detachably" is one of bonding, key connection, screw connection, pin connection, snap connection, hinge connection, clearance fit, or transition fit. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present invention, the term "in a movable manner" is one of a slide rail mechanism, a rack and pinion mechanism, or a worm and gear mechanism. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Example 1

A corneal thickness and anterior chamber depth measuring device includes at least an ultrasonic wave emitting unit 1 having a housing 108. As shown in fig. 1, the ultrasonic wave transmitting unit 1 includes a measuring probe 101 and an ultrasonic transducer 102 connected to the inside of the measuring probe 101 in a movable manner for transmitting and receiving ultrasonic wave signals. Wherein the measuring probe 101 is rotatably connected to the ultrasound emitting unit 1 in an articulated manner. The measurement probe 101 is rotatably connected in an articulated manner to a link connected to the turntable 106. The turntable 106 is fixed to an output shaft of the motor 105. The motor 105 is fixedly connected to the inner wall of the housing 108. For example, the ultrasonic transducer 102 is built in the measurement probe 101 through a slide rail mechanism, so that the ultrasonic transducer 102 and the measurement probe 101 are movably connected. The turntable 106 is detachably connected to the link. Specifically, the dial 106 is connected to the link by a stud. The motor 105 is detachably fixed to the inner wall of the housing 108. Specifically, the motor 105 is fixed to the inner wall of the housing 108 by a stud.

The ultrasonic transducer 102 includes a housing, matching layers, a piezoceramic disc transducer, a backing, and an exit cable. The piezoelectric ceramic transformer utilizes the piezoelectric effect of the polarized piezoelectric body to realize voltage output. When transmitting ultrasonic waves, the piezoelectric ceramic transformer converts input electric power into mechanical power by using the inverse piezoelectric effect, and transmits ultrasonic signals to the eyes through the measurement probe 101. The ultrasonic signals are transmitted to the air eye tissue by the measuring probe 101 through the couplant, and the ultrasonic signals are reflected back from the corneal epithelium, the corneal subcornel, the iris crystal and the retina respectively. The reflected ultrasonic signal is received by the ultrasonic transducer 102, and the piezoelectric ceramic transformer converts the ultrasonic signal into an electrical signal by using the positive piezoelectric effect.

after one detection is finished, the motor 105 drives the measuring probe 101 to rotate for a certain angle, so that the point-to-surface detection of the measurer is realized, the multi-angle measurement of eye tissues is realized, the system error of obtaining the results of the corneal thickness and the anterior chamber depth by a single point is effectively reduced, and the stability and the accuracy of the measurement data of the whole system are improved.

Preferably, the outer wall of the housing 108 is fixedly connected with one end of the elastic supporting frame 107 in a detachable manner, and the other end of the elastic supporting frame is connected with the measuring probe 101 through a hinge, so that the measuring probe 101 and the ultrasonic wave emitting unit 1 are rotatably connected. Specifically, one end of the elastic support frame is fixedly connected with the outer wall of the shell 108 in a transition fit manner. The elastic support frame is utilized to effectively reduce the extrusion of the measuring probe 101 to the eyes, so that the harm of the measurer to the eyes is reduced, and the accuracy of measured data is improved.

Preferably, as shown in fig. 2, the ultrasonic wave transmitting unit 1 further includes a differentiating unit including a differentiating circuit 103 for waveform conversion and a field effect switch 104; when the field effect switch 104 is turned on, the differentiating unit is turned on with the ultrasonic transducer 102 through the differentiating circuit 103 to generate ultrasonic waves; when the field effect switch 104 is turned off, the differentiating unit is not conducted with the ultrasonic transducer 102, and no ultrasonic wave is generated. The differentiating circuit 103 may convert the square wave to a spike wave, including capacitors, resistors, and integrated op-amps.

Preferably, as shown in fig. 2, the measuring device further comprises an ultrasonic data acquisition unit 2 connected to the output of the ultrasonic transducer 102. The ultrasonic data acquisition unit 2 includes an amplifier 201 for gain, a filter 202 for noise removal, and an a/D converter 203 for converting the acoustic wave signal into a digital signal. The amplifier 201 is connected to an a/D converter 203 via a filter 202.

Preferably, as shown in fig. 2, the output end of the ultrasonic data acquisition unit 2 is connected with the central processing unit 3. The central processor 3 includes a memory 301 and a chip 302. The chip 302 and the memory 301 are bidirectionally connected through a communication unit. The input of the memory 301 is connected 5 to the output of the a/D converter 203 via a buffer. For example, the chip 302 and the memory 301 are bidirectionally connected via an optical fiber.

Preferably, as shown in fig. 2, the output of the chip 302 is connected to the motor 105 through a communication unit. Specifically, the output end of the chip 301 is connected to the motor 105 through an optical fiber.

Preferably, as shown in fig. 2, the cpu 3 is connected to a display unit 4, and the display unit 4 includes a liquid crystal display 401 and a key unit 402. Wherein, the input end of the liquid crystal display 401 is connected with the output end communication unit of the chip 301; the output end of the key unit 402 is connected with the input end of the chip 301 through the communication unit. Specifically, the input end of the liquid crystal display 401 is connected with the output end of the chip 301 through an optical fiber; the output end of the key unit 402 is connected with the input end of the chip 302 through an optical fiber.

Preferably, as shown in fig. 2, the measurer further comprises a counter 6 having an input connected to the output of the comparison circuit 204. Wherein, the output end of the counter 6 is connected with the chip 302 through a communication unit; an input terminal of the comparison circuit 204 is connected to an output terminal of the amplification circuit 201.

Preferably, the ultrasonic transducer 102 is connected with the measuring probe 101 through a sliding rail mechanism; at least two visible light sources symmetrically arranged along the axial line of the ultrasonic transducer 102 are fixed on the outer wall of the ultrasonic transducer 102. For example, the outer wall of the ultrasound transducer 102 has two visible light sources symmetrically arranged along the central axis of the ultrasound transducer 102, the light speed emitted by the light sources is acute and converges to a point, and when the point coincides with the focal point of the ultrasound transducer 102 in the resting state, the measurement can be performed to reduce the injury to the eyeball. As another example, the housing 102 of the ultrasound transducer has 3, 4, or more visible light sources symmetrically disposed along a central axis of the ultrasound transducer 102. The visible light source may be one or more of an LED lamp, a diode, and a neon lamp.

preferably, the outer wall of the shell 108 is provided with a skid layer composed of at least one skid block. Wherein, at least one antiskid block is distributed on the outer wall of the shell 108 in an array mode, or at least one antiskid block is symmetrically distributed on the shell 108 by taking the central axis of the ultrasonic transmitting unit 1 as the center. For example, the anti-slip block is one or more of a rubber sleeve, a silica gel sleeve, an anti-slip spike and an anti-slip spiral thread. For example, 1 non-slip spiral is distributed in a circumferential array on the outer wall of the shell 108. For another example, 1 anti-slip spiral line is symmetrically distributed on the outer wall of the housing 108 with the central axis of the ultrasonic wave emitting unit 1 as the center. The number of the anti-skid blocks can be 2, 3 or more.

Preferably, the measuring probe 101 is detachably connected to a bowl-shaped eye cup with a scale value on the outer wall. Specifically, the measuring probe 101 is connected with a bowl-shaped eye cup with scale values on the outer wall in a clamping manner.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. A corneal thickness and anterior chamber depth measurer comprising at least an ultrasonic wave emitting unit (1) having a housing (108), characterized in that the ultrasonic wave emitting unit (1) comprises a measuring probe (101) and an ultrasonic transducer (102) movably connected inside the measuring probe (101) for emitting and/or receiving ultrasonic wave signals, wherein,

The measuring probe (101) is rotatably connected with the ultrasonic transmitting unit (1) in an articulated manner; the measuring probe (101) is rotatably connected with a connecting rod connected with a rotary table (106) in a hinged mode, the rotary table (106) is fixedly connected to an output shaft of a motor (105), and the motor (105) is fixedly connected to the inner wall of the shell (108).

2. The corneal thickness and anterior chamber depth measuring device as claimed in claim 1, wherein an outer wall of the housing (108) is fixedly connected with one end of an elastic support frame (107) in a detachable manner, and the other end of the elastic support frame (107) is connected with the measuring probe (101) by a hinge, so that the measuring probe (101) is rotatably connected with the ultrasonic wave emitting unit (1).

3. The corneal thickness and anterior chamber depth measuring instrument as claimed in claim 2, wherein said ultrasonic wave emitting unit (1) further comprises a differentiating unit including a differentiating circuit (103) of waveform conversion and a field effect switch (104);

When the field effect switch (104) is conducted, the differentiating unit is conducted with the ultrasonic transducer (102) through a differentiating circuit (103);

when the field effect switch (104) is turned off, the differentiating unit is not conducted with the ultrasonic transducer (102).

4. A corneal thickness and anterior chamber depth measurer as claimed in claim 3, further comprising an ultrasonic data acquisition unit (2) connected to an output of the ultrasonic transducer (102), the ultrasonic data acquisition unit (2) comprising an amplifier (201) for gain, a filter (202) for noise removal, and an a/D converter (203) for converting an acoustic signal into a digital signal; wherein the content of the first and second substances,

The amplifier (201) is connected to the A/D converter (203) via the filter (202).

5. The device as claimed in claim 4, characterized in that the output of the ultrasonic data acquisition unit (2) is connected to the central processor (3); the central processing unit (3) comprises a memory (301) and a chip (302),

Wherein the chip (302) is bidirectionally connected with the memory (301) through a communication unit;

The input of the memory (301) is connected (5) to the output of the A/D converter (203) via a buffer.

6. The device as claimed in claim 5, characterized in that the output of the chip (302) is connected to the motor (105) via the communication unit.

7. The device for measuring the thickness of the cornea and the anterior chamber depth as claimed in claim 6, wherein the central processor (3) is connected with a display unit (4), the display unit (4) comprises a liquid crystal display (401) and a key unit (402),

The input end of the liquid crystal display screen (401) is connected with the output end of the chip (302) through the communication unit; the output end of the key unit (402) is connected with the input end of the chip (302) through the communication unit.

8. The corneal thickness and anterior chamber depth measurement device of claim 7, further comprising a counter (6) having an input connected to an output of the comparison circuit (204),

Wherein the output end of the counter (6) is connected with the chip (302) through the communication unit; the input end of the comparison circuit (204) is connected with the output end of the amplifier (201).

9. The corneal thickness and anterior chamber depth measuring device as claimed in claim 8, wherein the ultrasonic transducer (102) is connected with the measuring probe (101) by a slide rail mechanism;

At least two visible light sources symmetrically arranged along the axial line of the ultrasonic transducer (102) are fixed on the outer wall of the ultrasonic transducer (102).

10. the device as claimed in claim 1, characterized in that the outer wall of the housing (108) is provided with an anti-slip layer consisting of at least one anti-slip block,

Wherein at least one of the cleats is distributed in an array on an outer wall of the housing (108), or,

The anti-skidding blocks are symmetrically distributed on the outer wall of the shell (108) by taking the central axis of the ultrasonic transmitting unit (1) as a center.