neurodiagnostic test sleep clinic india

Sleep Studies





What is Sleep Study?

The sleep study consists of a non-invasive test called a polysomnogram. This records a variety of body functions during sleep such as electrical activity of the brain, sleep pattern, breathing, oxygen levels, heart rate and rhythm, and muscle tone. The sleep technologist will connect the patient to the monitoring equipment via a series of stick-on electrode patches. The wires are long enough so that you can sleep in any position you wish. Once the study is complete, the test data is reviewed and "scored" by a specialist and relevant recommendations are made.

Levels of Sleep Study

Complete Study--

  • Level 1 :
  • neurodiagnostic tests level 1 neurodiagnostic tests level 2

    (Clinic) In this, the patient is asked to come to the clinic in night's comfortable clothing at 9:30 pm on the day of the test - a sleep technologist will place sensors on patient's scalp, face, chest and legs. These sensors will record brainwave activity (to assess sleep stage), eye movements, muscle activity, heart rhythm, body movements, nasal/oral airflow, respiratory effort and oxygenation. The test is an overnight test, will continue till the usual wake-up time of the patient.

  • Level 2 :
  • (Home-based) It's the same study like clinic- based, the only difference is it is performed at patient's home and the technician will stay overnight at patient's home till the completion of the test.
    CPAP Titration-will be performed during the above if required on the same night.

Screening-(without technician)
  • Level 3:
  • neurodiagnostic tests level 3 neurodiagnostic tests level 4

    In this the Technician will go to the patients home and fix the machine, will teach the patient how to use the equipment but NOT spend the night. The equipment shall be picked up the next morning or dropped by patient(after discussion). This will record more than 4 channels i.e. snoring, breathing effort, oxygen saturation and ECG.

  • Level 4 :
  • In this patient comes to the clinic, learns how to use the sleep recording device by himself and will drop the equipment to the clinic , the following morning. This will record only two channels: breathing and oxygen saturation.


How can I get a sleep study done?

You need to make an appointment for the study. The test is conducted at night. It is advisable to meet with a sleep specialist before the test,


What's involved in a sleep study? :
  • The patient comes to the hospital at 8:30 - 9:00 pm at night of the study and leaves the following morning when the study is complete, at about 5:30 - 6:00 am.
  • On the day of your sleep study, avoid caffeine (coffee, tea, cola, chocolate) after 2.00 pm and try not to nap.
  • Before coming to sleep centre, wash and dry your hair, and not apply hair sprays or oil.
  • After you arrive at the sleep center, you may be asked to complete a questionnaire on your symptoms and asked to change into your night clothes. The technician will connect you to a few sensors that will record your brain waves, eye movements, and muscle movements throughout the night. A microphone attached to your neck records snoring, and two belt-like straps around the chest and lower abdomen monitor muscle movement during breathing.
  • When everything is working properly, the lights will be turned off and you can go to sleep. You will be awakened in the morning and the electrodes will be removed. Since they are applied with water-soluble glue or tape, removal isn't painful

What do I need to bring? :
  • Your night clothes, including bathrobe and slippers.
  • Toiletries
  • Any medication that you regularly take.
  • If you need special bed clothings (thin mattress or pillow) to sleep well, please feel free to bring these along.
  • You may have dinner at home before coming or can bring it along with you.
  • Clothes for the following day.
  • A book or other reading material.

When should a screening study be AVOIDED?

1. Those who have a very low chance or possibility of having OSA.
2. Those with symptoms suggestive of a condition other than OSA , they require more extensive monitoring, e.g. sleep talking,sleep walking,sleep screaming,sleep eating, narcolepsy(Excessive daytime sleepiness in daytime), periodic limb movement disorder(Restlessness in legs), nocturnal epilepsy(seizure attacks in night during sleeping) etc .
3. Those with severe muscle disease or diseases of the nervous system with impaired breathing
4. Severe asthma, COPD or restrictive lung disease
5. Severe obesity
6. Severe heart disease .

More about sleep study


If you can’t decide which sleep study is right for you we can help -please call us on 011-46070321, 011-41656260,9643500270 on Monday-Saturday from 10 to 5 pm.

Choosing a wrong sleep study will lead to:
1. misdiagnosis, underdiagnosis,
2. Delay in treatment.


When will I know the result? :

Usually after 48 hours-72 hours.


Important: :

If your symptoms change significantly (either better or worse) or if you are unwell just prior to your allocated night in sleep laboratory, please notify us immediately.



Treatment for sleep apnoea (stopping breathing during sleep) involves the use of a nasal CPAP (Continuous Positive Airway Pressure) machine.
The set-up for the CPAP trial involves all the same leads as the diagnostic study. The technicians will increase the pressure of the machine until the person stops snoring and they are breathing without obstruction.

Airway splinted open air flows freely to lungs



  • This test is conducted during the day and usually follows immediately after a routine study. You get up at your usual time but no later than 7:30 am, get dressed and have breakfast.
  • At around 9 or 9:30 am you lie down in a quiet dark room for twenty minutes to see whether or not you fall asleep.
  • After twenty minutes you get up you read or do some work until the next nap which is around 11:00- 11:30 am.
  • There are at least four naps finishing at around 3:30pm.
  • During the test you are not allowed to have any caffeine as this will affect your sleep. This means no coffee, tea or Chocolates!


Actigraphy is the newer technique applied in sleep medicine.
What is Actigraphy?

Actigraphy is the use of instruments, sensitive to movement to record activity overtime.


What is actigraph?

ACTIGRAPH is device use in actigraphy. It is based on miniaturized acceleration sensor, that translates physical motion to a numeric representation.


How is it performed?

neurodiagnostic tests actigraphy testThe actigraph is initialized using the specific software, required data about the patient is stored. The device is worn (around ankle/wrist). He is asked to press the button on the actigraph when he lies in bed and on waking up. The duration of recording can be from 24 hours - 5 days. The actigraph is connected to a computer, data is downloaded, the software automatically analyses the movements, which are represented graphically. These movements are analyzed into PLM/Isolated movements in leg up/down position. The summary is reported based on PLM/hr. in down position.


Indications:
  • Insomnia
  • Restless Leg Syndrome
  • Periodic Limb Movement Disorder
  • Sleep in Psychiatric and Medical Condition
  • Chronic Fatigue Syndrome
  • Sleep Apnea and Respiratory Disturbances
  • Excessive Daytime Somnolence
  • Effect of Treatment
  • To monitor/evaluate

Caution:

Actigraphy is useful as a complementary assessment method for Insomnia, RLS, shift work and for assessing sleep quality.