Pupil pen convenient for measurement

Abstract

The invention discloses a pupil pen convenient for measurement. The pupil pen comprises a plurality of blades, a rotating disc, a parallel light source, a stepping motor, a motor switch, a display anda controller which are arranged in a penholder, wherein the blades can rotate to form light rings with different sizes; the rotating disc is provided with a groove; a limiting block sliding in the groove is arranged on each blade; the rotating disc is turned to ensure that the limiting block in the groove drives the blades to rotate to form the light rings with different sizes; the stepping motoris used for driving the rotating disc to rotate; the motor switch is used for controlling the stepping motor to rotate; the parallel light source, the stepping motor, the motor switch and the displayare separately connected with the controller. Light spots with the diameter being the same with that of the light rings when light passes the light sources, and are projected to pupils of a patient,the light rings are gradually reduced till being matched with the pupils of the patient, the sizes of the pupils are obtained and are displayed on the display of the outer side of the penholder, and further the sizes of the pupils are objectively and accurately judged out.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a pupil pen for convenient measurement. Background technique [0002] Pupil size plays an important role in the judgment of the disease. Doctors regard the pupil as a sensitive indicator of vital functions and a major indicator in disease observation. Therefore, it is necessary to objectively record the pupil size. When a patient suffers from cerebral herniation, increased intracranial hypertension, near death, or severe brain damage, the pupil often appears dilated; when the patient suffers from atropine poisoning, cerebellar lesions, morphine poisoning, etc., the pupil often appears dilated. The judgment directly determines the accuracy of the judgment of the evolution of the patient's condition and the type of disease. At present, medical personnel often use methods to judge pupils such as: ① Subjective judgment method, which mainly relies on the work experience of ...

AI Technical Summary

Problems solved by technology

It is to use the pupil pen to illuminate the shadow with the scale, and judge the pupil size by reading the scale. This method needs to read the readings at both ends and then add and subtract each time. At the same time, it is difficult to control the circle diameter of the pupil passing through the scale, and the reading error is large.

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