Wednesday, 6 January 2021
Tuesday, 29 December 2020
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Wednesday, 23 December 2020
Why Do I Need A Polysomnography
What Is A Polysomnography
Polysomnography (PSG) is a study or test done while you're fully asleep. Your doctor will observe you as you sleep, record data about your sleep patterns, and identify any sleep disorders. Your doctor will measure the following during PSG to help chart your sleep cycles:
brain waves
skeletal muscle activity
blood oxygen levels
heart rate
breathing rate
eye movement
PSG registers your body's shifts between the two stages of sleep, which are rapid eye movement (REM) sleep, and non-rapid eye movement (non-REM) sleep. Non-REM sleep is divided into "light sleep" and "deep sleep" phases.
During REM sleep, your brain activity is high, but only your eyes and breathing muscles are active. This is the stage in which you dream. Non-REM sleep involves slower brain activity. A person without a sleep disorder will switch between non-REM and REM sleep about every 90 minutes, experiencing four to six sleep cycles per night.
Observing your sleep cycles, along with your body's reactions to the changes in these cycles, can help identify disruptions in your sleep patterns.
Why Do I Need A Polysomnography
Your doctor can use PSG to diagnose sleep disorders. It often evaluates for symptoms of sleep apnea, a disorder in which breathing constantly stops and restarts during sleep. The symptoms of sleep apnea include:
sleepiness during the day despite having rested
ongoing and loud snoring
periods of holding your breath during sleep, which are followed by gasps for air
frequent episodes of waking up during the night
restless sleep
Polysomnography can also help your doctor diagnose the following sleep disorders:
narcolepsy, which involves extreme drowsiness and "sleep attacks" during the day
sleep-related seizure disorders
periodic limb movement disorder or restless leg syndrome, which involves uncontrolled flexing and extension of the legs while asleep
REM sleep behavior disorder, which involves acting out dreams while asleep
chronic insomnia, which involves having difficulty falling asleep or remaining asleep
The National Heart, Lung, and Blood Institute (NHLBI) warns that if sleep disorders go untreated, they raise your risk of heart disease, high blood pressure, and stroke. There's also a link between sleep disorders and an increased risk of injuries related to falling and car accidents.
Thursday, 3 December 2020
Allergy Test & Immunotherapy
What Is It?
When Appropriate Medications And Avoidance Of Allergens Are Inadequate For Control Of Respiratory Allergy (Allergic Rhinitis Or Asthma), Allergen Immunotherapy (Allergy Injection Treatment) May Be Indicated. The Treatment Consists Of Repeated Injections Of One Or More Mixtures Of Extracts Of Allergens Over A Period Of Several Years. Studies Of Oral Immunotherapy With Allergens (Drops Under The Tongue) Suggest That This Might Be Effective Under Certain Circumstances, But Has Not Been Proven To Be Effective For Treatment Of Sensitivities To Multiple Allergens Seen In Most Allergic Patients.
How Does It Work?
In the first year of treatment, the injections redirect the immune system toward more normal functioning. This has the effect of suppressing the levels of IgE antibodies and reducing allergic inflammation, so that tolerance of exposure to allergen steadily improves.
How Is It Done?
The allergens selected for treatment are determined by the allergist to be important in provoking disease in the patient. Initially the injections are very small doses of weak allergen extracts given once or twice a week, and the doses are progressively increased as the reactivity of the patient's immune system to the allergens decreases.
Is It Effective And Safe?
Allergen immunotherapy has been proven by scientifically controlled studies to be effective in reducing symptoms. Although immunotherapy never provides a permanent cure for asthma or allergic rhinitis, it reduces the need for medications in many patients with allergic rhinitis and asthma. Because there is a risk of allergic reactions to the injections that varies from one patient to another, the allergist gives advice on the balance between benefits and risk before starting treatment.
Does It Work For All Allergies?
Allergy injection treatment is more effective for allergy to pollen, cats and house dust mites than it is for mold allergy. This is fortunate for us in the desert, where mold allergy is less of a problem than in more humid climates and where both allergic rhinitis and allergic asthma are commonly triggered by pollen. Immunotherapy appears to be less effective in the treatment of allergic asthma than in the treatment of allergic rhinitis, but patients who have both conditions usually benefit from immunotherapy. It is not indicated for treating food allergy.
Does It Replace The Need For Medications?
Since improvement in symptoms is normally delayed for 9-12 months, medications taken before starting the injections must NOT be stopped during this period. Medication requirements usually decrease after one year of treatment, but some patients never become independent of medications.