Does Xi'an ophthalmic examination require early drug withdrawal?

Ophthalmic examination is very important for our eye health, and whether it is necessary to stop taking medicine in advance is a common problem. In Xi'an Eye Hospital, professional doctors will decide whether to stop the drug early according to different inspection items and conditions. The following is a detailed description of this problem from four aspects.

Aspect 1: fundus examination

Fundus examination is an important means to judge eye diseases by observing blood vessels, retina and other tissues in the fundus. Some drugs will affect the fundus, so it is necessary to stop the use of related drugs before fundus examination. Common drugs that need to be stopped include mydriasis drugs, intraocular pressure lowering drugs, etc. The drug withdrawal time is generally determined according to the half-life of the drug, and the doctor will give specific guidance according to the specific situation.

For patients with diabetes, hypertension and other diseases, because these diseases are easy to cause fundus lesions, relevant drugs should also be stopped during fundus examination. The purpose of drug withdrawal is to observe fundus conditions more accurately and guide treatment better.

Therefore, before fundus examination, patients need to accurately inform the doctor of the drugs they are using, so that the doctor can judge whether they need to stop early.

Aspect 2: corneal topography examination

Corneal topography is to evaluate the state of the anterior surface of the eye by measuring and analyzing the shape, curvature and other parameters of the cornea. Cornea belongs to non vascular tissue, and some topical drugs only affect the corneal surface, so drug withdrawal is not necessary; However, some drugs taken internally may affect the corneal morphology, and they need to be stopped before the examination.

Common drugs that need to be stopped include some hormone drugs and anti rheumatic drugs. These drugs will cause corneal edema after being used for a period of time, which will interfere with the accuracy of corneal topography. Therefore, before the corneal topography examination, the doctor will judge whether it is necessary to stop the medication in advance according to the individual condition.

For patients who are using these drugs, they need to consult the doctor before the examination whether they need to stop the drug, and operate according to the doctor's instructions.

Aspect 3: Venous fluorescein angiography

Intravenous fluorescein angiography is to evaluate the condition of retina and its blood vessels by observing the distribution and flow of fluorescent dyes in the fundus vascular system after intravenous injection of drugs. Before this examination, antihypertensive drugs and some mydriasis agents need to be stopped to prevent the diffusion of fluorescent dyes from being blocked.

The drug withdrawal usually starts the day before the examination and lasts until the end of the examination. This can ensure that the results of fluorescein angiography are more accurate and reliable, and provide better guidance.

Therefore, patients need to consult with their doctors to know the specific drug withdrawal matters and time, and operate in strict accordance with their doctors' recommendations before performing intravenous fluorescein angiography.

Aspect 4: corneal contact lens examination

Contact lens examination is an examination method to evaluate the adaptation of corneal contact lens. For patients who wear contact lenses, they need to stop using contact lenses for a period of time before examination to ensure the recovery and stability of the cornea.

The stopping time is generally one to two weeks or more before the examination, and the specific time needs to be determined according to the patient's personal situation. During this period, patients need to avoid using contact lenses to avoid affecting the examination results.

Therefore, before the corneal contact lens examination, the patient needs to consult the doctor about the stop time and specific precautions, and operate in strict accordance with the doctor's instructions.

To sum up, whether Xi'an ophthalmic examination requires early drug withdrawal depends on different examination items and personal conditions. Fundus examination, corneal topography examination, intravenous fluorescein angiography and corneal contact lens examination may require early drug withdrawal. Before the ophthalmic examination, the patient needs to consult the doctor for specific drug withdrawal and precautions, and operate according to the doctor's guidance to ensure the accuracy and reliability of the examination results.