Eyeball foreign body localization photography

Eyeball foreign body positioning photography is to check the film for X-ray examination when there is a foreign body sensation in the eye to check for the presence of foreign matter. X-rays have a certain amount of radiation and need to be mentally prepared. The number of exposures must not exceed 2 to 3 times. X-ray examination of infants and young children is best to expose only the part to be inspected, and the rest should be covered. Basic Information Specialist Category: Ophthalmic Examination Category: X-ray Applicable gender: whether men and women apply fasting: not fasting Reminder: For X-ray examination of infants and young children, it is best to expose only the part to be inspected, and the rest should be covered. Normal value The film did not show a foreign object pattern. Clinical significance Abnormal results: Generally, the lateral and posterior anterior slices of the skull and the eye are taken, and the presence or absence of foreign matter, its size, shape and approximate position can be determined from the flat sheet. If you position the camera, you can determine the exact location of the foreign object. This method is applicable to stone and glass with large metal foreign bodies. People who need to be examined: people with foreign body sensations in their eyes. Precautions Taboo before inspection: X-rays have certain radiation and need to be mentally prepared. The number of exposures must not exceed 2 to 3 times. X-ray examination of infants and young children is best to expose only the part to be inspected, and the rest should be covered. Requirements for inspection: Obey the doctor's instructions to check. Don't have to panic on the X line. When the patient is on X-ray examination, the safe exposure should be within 100 roentgens, and the allowable number of exposures and time should be determined according to the exposure amount. Inspection process 1. Positive position: (1) Position: Take the nasal position, the patient takes the sitting position or the prone position, the head is reclined, the tip of the nose and the lower jaw are placed on the side, the sagittal plane of the skull is perpendicular to the table top, and the hearing line is at a 67 degree angle with the film, and the eyes are directly viewed. (2) Photography distance: The photographing distance is 10 times the distance from the eyeball to the film (the purpose is to maintain the magnification of 1.1). (3) Centerline: Align the center of the eyeball and inject the film perpendicularly along the axis of the eyeball. (4) The photo shows that the upper edge of the rock bone is located under the armpit, and the limbus ring is displayed as a perfect circle in the middle of the eyelid. 2. Lateral position: (1) Position: The patient is lying prone, the head is turned to the opposite side, so that the sagittal plane of the skull is parallel to the film, the inter-turn line is perpendicular to the table, and the eyes are directly facing the front. (2) Photography distance: The photographing distance is 10 times the distance from the eyeball to the film (the purpose is to maintain the magnification of 1.1). (3) Centerline: The corneal edge plane of the eye of the inspected side is perpendicularly injected into the center of the film. (4) The photo shows that the side walls of the bilateral eyelids overlap, the concave surface of the front skull is shown as a single line, and the limbus ring shows a single straight line. measuring: 1. Orthotopic measurement: 3 to 9 o'clock and 6 o'clock to 12 o'clock on the limbal ring of the photo. The two straight intersections are defined as the central axis of the eyeball. The line from 3 o'clock to 9 o'clock and 6 o'clock to 12 o'clock of the orthographic positioning ruler coincides with the corresponding two lines on the photo. The positioning ruler can directly read the position of the foreign object and the radius value of the center axis of the eyeball. 2. Lateral measurement: a vertical line is made to the limbus through the coincidence point of the limbal ring at 3:9, which is defined as the axis of the eyeball. The lateral positioning scale is equivalent to the straight line (zero line) of the limbus and the straight line of the corneal edge of the photo. The depth of the foreign object and the distance of the foreign object from the axis of the eye can be directly read. 3. If the photos are not overlapped at 3 or 9 points, but the error is within 3mm, the measurement can be corrected after calibration, which basically does not affect its reliability. Not suitable for the crowd Pregnant women. Adverse reactions and risks No complications.