What Is Transillumination?

Skull transillumination test: The skull plates of newborns and children are thin and the cardia is not closed. When there is a large amount of liquid under the dura, it can pass a part of the light and diffract to the surroundings.

Name: Skull radiograph test

category: X-ray

Normal value of skull radiograph test

(1) Immature: 3cm; (2) Newborn: 2cm; (3) Infant between 2 months and 12 months: 1.5cm; (4) Infant between 13 and 18 months: 0.5cm;

Clinical significance of skull radiograph test

The results are abnormal: (1) Localized subdural effusion: This test is positive, and the location and scope of the effusion can be determined. You can also follow up and observe the effusion. (2) Hydrocephalus: extensive bilateral subdural effusion, positive test, ipsilateral and contralateral, and even the entire head is transparent. (3) If the subdural effusion is bloody or purulent, this test may be negative, depending on the concentration of the effusion. Hydrocephalus, subdural fluid. Head trauma. Adapt to the crowd: hydrocephalus, fluid under the hard mold

Precautions for skull radiograph test

Inappropriate crowd: Before head trauma examination, pay attention: shave the hair around the child's cardia, wash the hair, do not apply oil, keep clean. Requirements during inspection: in a dark room.

Skull transillumination test

(1) The child is shaved, the scalp is washed and examined in a dark room. (2) Ask the child to be quiet and take a supine position. An ordinary large flashlight is used as the light source, and a dark sponge with a thickness of about 1cm-1.5cm is cut into a circle with a width of about 1cm. (3) Stick the sponge ring on the scalp of the child, press the sponge on the light-emitting end of the flashlight, turn on the flashlight switch, and illuminate different parts of the forehead, pillow, and temporal area. (4) Observe the size of the aperture around the flashlight when projecting, whether there is any defect.

Skull transillumination test related diseases

Pediatric craniocerebral injury, neonatal convulsion, hydrocephalus, cerebrospinal fluid leakage, facial muscle spasm, plasmacytoma, intracranial lipoma, cranial fibrous hyperplasia, high intracranial hydrocephalus, traumatic hydrocephalus, etc.