A super introduction
The A-mode ultrasound scan is to display the echo of the interface of the detected tissue as a peak, and arrange it on the baseline in the chronological order of the echo return probe to form a one-dimensional linear image consistent with the detection direction.
Type A ultrasound is the basic ultrasound mode and is the basis for other more complex application models.
Type A ultrasound imaging can be displayed on a single ultrasound instrument or on an A/B ultrasound instrument.
Scope of application <br> Physiological characteristics: Measurement of axial length, anterior chamber depth, lens thickness, and measurement of corneal thickness in the cornea and in each quadrant.
Auxiliary corneal curvature, corneal topography, comprehensive refractometer, fundus examination and other tests to analyze the type and extent of refractive error of myopia and astigmatism to prevent the development of myopia.
Diagnosis of ocular diseases such as corneal diseases, cataracts, glaucoma, etc., and evaluation of various therapeutic effects.
Screening for indications for refractive keratectomy (eg excimer refractive surgery)
Various types of contact lenses before and after the routine examination, contact lens and Ortho-K CL to control the effect of myopia treatment and adverse reactions.
Pre-test preparation and precautions <br> Make sure all measurement conditions are set correctly.
Before the measurement, explain to the patient the instruments and measurement methods used to eliminate the tension.å˜±å’ Patients avoid violent physical movements (may damage the cornea), and the doctors check the measurements, the eyeball to avoid rotation as much as possible.
Ask the patient if there is a history of allergic reactions to the surface anesthetics, and inject the corneal surface anesthetic into the eyes, and let the patient sit or sit for five minutes before starting to measure.
The A-super probe is in direct contact with the cornea, which may spread by germs and cause cross-infection. Therefore, before use, the A-super probe should be disinfected with a medical alcohol wipe, but it is strictly forbidden to use a long-time soaking probe to prolong the life of the A.
(After the examination) To prevent infection, after the examination, one drop of antibiotic eye drops in each eye.
(After the examination), the eyes will have a feeling of numbness in a short time. It is a follow-up effect of the anesthetic. Avoid rubbing your eyes with your hands. A small number of patients may have pain caused by a small amount of corneal epithelium falling off. This is a cure within 24 hours caused by anesthetics. If you feel that the pain is obvious, you should see the clinic immediately.
Direct contact test : A method in which the probe is in direct contact with the cornea. Place the probe on the surface of the cornea, and the sound waves pass through the center of the apex of the cornea. Through the center of the lens, the vitreous, and the center of the macula, the length of the eye axis and related biometric parameters can be obtained.
Indirect infiltration test : same as direct contact test. It is only necessary to prepare an eye cup before the examination. The eye cup has a smooth inner and outer edge, and is placed between the upper and lower eye faces to keep the eye face open.
Eye cup diameter: 18-28mm
Adult: 22mm and 24mm
Child: 18mm
The A-mode ultrasound scan is to display the echo of the interface of the detected tissue as a peak, and arrange it on the baseline in the chronological order of the echo return probe to form a one-dimensional linear image consistent with the detection direction.
Type A ultrasound is the basic ultrasound mode and is the basis for other more complex application models.
Type A ultrasound imaging can be displayed on a single ultrasound instrument or on an A/B ultrasound instrument.
Scope of application <br> Physiological characteristics: Measurement of axial length, anterior chamber depth, lens thickness, and measurement of corneal thickness in the cornea and in each quadrant.
Auxiliary corneal curvature, corneal topography, comprehensive refractometer, fundus examination and other tests to analyze the type and extent of refractive error of myopia and astigmatism to prevent the development of myopia.
Diagnosis of ocular diseases such as corneal diseases, cataracts, glaucoma, etc., and evaluation of various therapeutic effects.
Screening for indications for refractive keratectomy (eg excimer refractive surgery)
Various types of contact lenses before and after the routine examination, contact lens and Ortho-K CL to control the effect of myopia treatment and adverse reactions.
Pre-test preparation and precautions <br> Make sure all measurement conditions are set correctly.
Before the measurement, explain to the patient the instruments and measurement methods used to eliminate the tension.å˜±å’ Patients avoid violent physical movements (may damage the cornea), and the doctors check the measurements, the eyeball to avoid rotation as much as possible.
Ask the patient if there is a history of allergic reactions to the surface anesthetics, and inject the corneal surface anesthetic into the eyes, and let the patient sit or sit for five minutes before starting to measure.
The A-super probe is in direct contact with the cornea, which may spread by germs and cause cross-infection. Therefore, before use, the A-super probe should be disinfected with a medical alcohol wipe, but it is strictly forbidden to use a long-time soaking probe to prolong the life of the A.
(After the examination) To prevent infection, after the examination, one drop of antibiotic eye drops in each eye.
(After the examination), the eyes will have a feeling of numbness in a short time. It is a follow-up effect of the anesthetic. Avoid rubbing your eyes with your hands. A small number of patients may have pain caused by a small amount of corneal epithelium falling off. This is a cure within 24 hours caused by anesthetics. If you feel that the pain is obvious, you should see the clinic immediately.
Direct contact test : A method in which the probe is in direct contact with the cornea. Place the probe on the surface of the cornea, and the sound waves pass through the center of the apex of the cornea. Through the center of the lens, the vitreous, and the center of the macula, the length of the eye axis and related biometric parameters can be obtained.
Indirect infiltration test : same as direct contact test. It is only necessary to prepare an eye cup before the examination. The eye cup has a smooth inner and outer edge, and is placed between the upper and lower eye faces to keep the eye face open.
Eye cup diameter: 18-28mm
Adult: 22mm and 24mm
Child: 18mm
- Direct contact method
- Choice of eyeball state: Select normal eye, lens dense eye, aphakic eye, and pseudo lens eye according to the patient's eyeball state.
- Choice of inspection methods: automatic measurement and manual measurement. During automatic measurement, the instrument automatically freezes the image and saves the result according to whether the selected eye state meets the preset conditions. In the manual measurement state, the examiner manually freezes the image and then moves the electronic door to perform measurement according to the image displayed by the instrument.
- Inspection method: Surface anesthesia of the eye to be examined before examination. There is a red gaze light at the top of each dedicated probe. If the patient's vision can be watched, the patient will look at the red light when the patient is examined. When the probe gradually contacts the cornea, if the measurement condition meets the preset value, the instrument automatically freezes the image and displays the measurement result. The measurement is repeated 3-5 times, and if the error of the multiple measurement is within 0.1 mm, the inspection result can be determined; otherwise, the foregoing inspection process is repeated until the result satisfies the measurement condition.
- Indirect infiltration test
How to place the eye cup: In order to alleviate the patient's pain, it is better to cooperate with the doctor's examination. The eye can be anesthetized before the eye cup is placed. After the anesthesia is sufficient, the eye cup is placed in the eye face. First, select the appropriate eye cup according to the size of the patient's face. The examiner's hands will separate the examinee's eye face, and the patient's eyeball will turn down. Lift the upper eye face and place one side of the eye cup under the upper eye face. Let the patient turn the eyeball upwards, pull the patient's lower eye face down, expose the lower jaw, and place the eyecup completely inside the patient's conjunctival sac.
When inspecting, first inject a coupling agent (such as balanced salt solution, artificial tears, etc.) into the eye cup, and then place the probe in the couplant without directly contacting the cornea. The distance between the two is 5-10 mm. The result of the inspection can be obtained by moving the probe to obtain the best image that meets the preset value of the instrument.
Immediately follow the Kexin Micro Signal xzkxele to see more details about Ophthalmology A. (You only need to search for "Xuzhou Kaixin" in the public number or scan the QR code below to pay attention!) For more information, please contact customer service hotline 0516-87792938 400-928-6626 .
When inspecting, first inject a coupling agent (such as balanced salt solution, artificial tears, etc.) into the eye cup, and then place the probe in the couplant without directly contacting the cornea. The distance between the two is 5-10 mm. The result of the inspection can be obtained by moving the probe to obtain the best image that meets the preset value of the instrument.
Immediately follow the Kexin Micro Signal xzkxele to see more details about Ophthalmology A. (You only need to search for "Xuzhou Kaixin" in the public number or scan the QR code below to pay attention!) For more information, please contact customer service hotline 0516-87792938 400-928-6626 .
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