polysomnography

Polysomnography is mainly used to diagnose sleep-disordered breathing, including sleep apnea syndrome, snoring, upper airway resistance syndrome, and other auxiliary diagnosis of sleep disorders, such as narcolepsy, restless legs Classification, insomnia classification, etc. Including EEG (analysis of sleep structure), ocular electricity, mandibular muscle, nasal and nasal airflow and respiratory mobility, ECG, blood oxygen, snoring, limb movement, body position and other parameters. The polysomnography examination is to continuously and synchronously trace more than 10 indicators such as EEG and respiration during the whole night sleep. All the records are automatically analyzed by the instrument the next day and then verified manually. Surveillance consists primarily of three components: 1 analysis of sleep structure, progression, and monitoring of abnormal EEG. 2 Monitor sleep breathing function to detect sleep-disordered breathing and analyze its type and severity. 3 monitor sleep cardiovascular function. In addition, physical activity or penile erection can be recorded as needed to understand some of the causes of insomnia and the nature of impotence. Basic Information Specialist classification: neurological examination classification: neuroelectrophysiology Applicable gender: whether men and women apply fasting: not fasting Tips: Do not drink alcohol or use sleep medicine before checking. Do not start drinking caffeinated beverages at noon on the day of the inspection. Normal value The records of the resulting sleep latency, number of awakenings and time, two sleep phases and each phase of sleep, wake-up time and total sleep time were consistent with international quantitative criteria. Clinical significance Abnormal results: The following diagnosis can be made based on the records and analysis of the resulting sleep latency, the number and duration of wakefulness, the two sleep phases and the proportion of each sleep, the wake up time, and the total sleep time. 1, can correctly assess the truth of insomnia, and found some causes of insomnia, such as brain lesions, depression, sleep-disordered breathing, abnormal limb movements. 2, found that sleep disordered breathing including obstructive and central sleep apnea syndrome, benign snoring, sleep suffocation, sleep and shortness of breath. Clinically, obstructive sleep apnea syndrome with habitual ringing and frequent respiratory interruption is the most common, which can cause a series of diseases including cardiovascular and cerebrovascular diseases. 3, diagnosed certain neurological diseases including narcolepsy, periodic limb movement, restless legs syndrome and various sleep disorders, such as night snoring, night terrors, nighttime panic attacks, with dreams Rough action, etc. 4, the diagnosis of occult depression is currently very common depression, and often with a variety of physical symptoms. The disease has a special performance in polysomnography, which can help diagnose and diagnose organic depression. People who need to be examined: patients with insomnia and sleep-disordered breathing. Precautions Taboo before inspection: 1. Do not drink caffeinated beverages (tea, coffee, chocolate and cola) at noon on the day of the inspection. 2. Do not drink alcohol or use sleep medicine before the test (unless these have become your daily routine). Those who have been taking certain medications for a long time can consult their doctors in advance which drugs cannot be stopped. If you drink alcohol before the test, you should explain it to the technician. 3, do not take a nap on the day of inspection, unless this becomes your own habit. 4, comes with a loose pajamas and pajama pants, pajamas must be able to untie the front to facilitate inspection. 5. Please take a bath at home before checking, but do not use body lotion. Do not use hair or hair care products after bathing. 6, male patients should be shaved before examination (with chest hair, please shave together). 7, female patients require hair not to shoulder. 8, comes with a potty or potty. Requirements for inspection: Relax and actively cooperate with the doctor's work. Inspection process Polysomnography monitoring content (1) Sleep condition: By recording EEG, EEG, and EMG accurately reflect sleep status and staging EEG: It is necessary to distinguish between sleep and wake-up, the proportion of each stage of sleep and its proportion. Electrooculogram: Differentiate between REM and NREM depending on whether the eyeball is moving. Electromyography: Record electrical activity from muscle activity in the mandibular area, assisting in distinguishing between REM and NREM. (2) Respiratory conditions: Nasal airflow: Use a temperature-sensitive thermistor to sense the temperature difference between the exhaled breath and the inhaled breath to understand the presence or absence of airflow and determine whether sleep apnea has occurred. Chest and Abdominal Movement: Distinguish central or obstructive sleep apnea by sensing the presence or absence of thoracic and abdominal activity through electrical resistance or other conductive substances in the chest and abdomen. Oxygen determination: Continuously collecting oxygen saturation through the sensor attached to the finger can understand the time and extent of hypoxia during the whole sleep process, which is helpful for judging the severity of the sleep apnea syndrome and estimating the therapeutic effect. (C) Heart condition: Through the electrocardiogram to understand the changes in the central rate of the whole sleep process and the waveform of the ECG, analyze the relationship between various arrhythmia and other abnormal waveforms and apnea, and evaluate the treatment effect. (4) Others: The above three aspects are sufficient to diagnose sleep apnea syndrome (OSAS), but some polygraphs also record snoring to understand the nature of snoring, and the relationship between sleep apnea and its frequency spectrum; There is a position sensor that records the changes in the position of the patient during sleep and understands the relationship between apnea and sleeping position, so as not to miss the apnea that only appears in the supine position. The test was performed in a polysomnography room and was tested continuously for two nights. After the technician installs the head electrode for the patient, the patient sleeps in the bed of the test room (separate room), and the instrument will simultaneously record changes in various indicators such as EEG and EMG. During the test, a physician and technician observe the changes in sleep EEG and other indicators in the monitoring room. The patient disengaged the electrode after waking the next day. The test is non-invasive, non-radiative and other toxic side effects. The examination took two consecutive nights, the patient was adapted to the environment of the sleep laboratory on the first night, and the relevant indicators were detected on the second night. In the case of a female patient, a female medical worker performs the test. The examination needs to monitor the sleep process throughout the night, and synchronize and record a number of physiological indicators, including sleep EEG, respiration, heart rate and other indicators. Combined with clinical, comprehensive analysis of the test results can provide scientific expression and objective evaluation of the whole process of sleep, which can provide an objective basis for the diagnosis, classification and differential diagnosis of sleep disorders. Not suitable for the crowd Nothing is suitable for the crowd. Adverse reactions and risks Nothing.