nasal olfactory function test

In addition to the function of breathing and vocal resonance, the nose also has an olfactory function. Some people think that the olfactory function has little effect on human health, so the olfactory health care is often neglected, even if the sense of smell is lost. In fact, loss of sense of smell is often not an independent condition, mostly due to accidents such as strong external impact or a certain disease, may be an early symptom of intracranial lesions or mental illness, so it should not be ignored. If it is not treated in time, it will lead to the onset of its symptoms, and the consequences can be large or small. In addition, people with olfactory disorders often feel a lot of inconvenience in their lives and work. Many people eat the corrupted food because they can't smell the smell. Because they can't notice the smell of gas leak, they can't prevent the fire. Because they can't smell the smell, they can't enjoy the delicious food and the pleasure of flowers. All kinds of olfactory disorders. It plagues human nutrition, health, safety, quality of life and other aspects. Nasal olfactory function tests are very important. Basic Information Specialist Category: Otolaryngology Examination Category: Other Inspections Applicable gender: whether men and women apply fasting: not fasting Tips: Do not touch irritating substances before inspection. Normal value The odor of various olfactory agents can be correctly identified, and no black olfactory band appears on the olfactory threshold examination. Macroscopic Respiratory Response Olfactory Test Inject 20 ml of pyridine-containing air into the mask while inhaling. If there is a slight sensation, the breath stops immediately for 2 to 3 seconds. Clinical significance Abnormal results: If there is a tumor inside the nose, or it is swollen due to inflammation or sensitivity, causing the nose to block, the taste can not be transmitted to the olfactory nerve fiber, so there is no smell, among which rhinitis, sinusitis and nasal polyps lead to Bilateral olfactory decline, nasal septum deviation, nasal papilloma and nasal tumors are mostly unilateral olfactory decline. Patients with sinusitis, nasal foreign bodies, or neuropathy often have a bad smell, that is, smells that other people cannot feel. The olfactory nerve is the specialized sensory nerve of the sense of smell. When the patient has an accident and the inside of the brain is oscillated, the tiny olfactory nerve fibers may be partially or completely torn. The tumor in the patient's brain will also cause the patient to smell something, but they will not feel the taste. Among them, the olfactory sulcus meningioma is located in the olfactory sulcus (the position where the olfactory nerve is located), usually the first to attack the olfactory nerve and its fibers. Causes the olfactory decline to gradually increase. In addition, taking neurogenic olfactory drugs or long-term exposure to contaminated gases may also damage the olfactory mucosa and olfactory nerves, causing olfactory degeneration; olfactory neuritis or neurosis can cause olfactory sensation. The slight smell smells very strong. When a patient suffers from a mental illness, it can also cause the sense of smell to drop or be distorted. It clearly feels that it smells a certain smell, but it does not actually exist. Medically known as rickets olfactory decline and illusion. People who need to be examined: patients with blocked nose, damaged olfactory nerves or damaged brain. Precautions Taboo before inspection: Pay attention to rest, don't be nervous. Requirements for inspection: The sense of smell is easy to fatigue. During the long inspection process, a short rest period is required to avoid fatigue and affect the result. Inspection process (1) Simple method: When using different odors such as essence, vinegar, camphor oil, kerosene for olfactory examination, and using water as a control agent. Each olfactory agent is separately placed in the same color of the vial, the subject is free to choose the bottle to hold, the finger blocks the same side nostril, the other side of the nostril sniffs, and the nature of the odor is checked, and the inspection is completed in turn. This method can only test for olfactory function. Suitable for collective physical examination. (2) Olfactory threshold test method: the lowest olfactory concentration that most people can smell is the “smell unit”, and 10 bottles are prepared according to the olfactory unit of 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. . Druek stipulates 7 kinds of olfactory agents, which are matched into 70 bottles. The lowest discrimination threshold for 7 substances is detected during inspection. It is marked with a small square of 7×10, which is called olfactory spectrum. When a certain scentin is missing, a black olfactory band appears on the olfactory spectrum. (3) Macroscopic Respiratory Response Olfactory test: When a normal person breathes air containing pyridine, the breath immediately stops for a few seconds; if the sense of smell is absent, the respiratory rhythm does not change. According to this, the following inspection can be carried out: cover the eyes with a cloth, cover the nose with a breathing mask, and connect the marking drum to the chest and the abdomen to record the breathing of the subject. After wearing a mask, it forms a slight hypoxia, and the breathing movement is enhanced, but there are rules. When inhaling, inject 20ml of pyridine-containing air into the mask. If there is a weak feeling, the breath will stop immediately for 2 to 3 seconds. If the sense of smell is missing, there will be no change. Not suitable for the crowd Inappropriate crowd: None. Adverse reactions and risks No related complications and hazards have been found.

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