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Polygraphy

Simple home-based polygraph device

What is Polygraphy?

Why is Polygraphy important?

How is Polygraphy different from Polysomnography?

How is polysomnography different from polysomnography?

Advantages of Polygraphy (PG):

  • Convenience: Unlike PSG, where you need an appointment with a technician, RP allows you to pick up the device and perform measurements at your convenience.
  • Ease of Installation:* PG devices are straightforward to set up, following the technician’s instructions.
  • Comfort: You get to sleep in your own bed during the test.
  • Cost-Effective: PG is more budget-friendly; its cost can be half that of a polysomnogram.
  • Effective for Obstructive Sleep Apnea Diagnosis:* PG serves as a reliable test for diagnosing obstructive sleep apnea.

Disadvantages of Respiratory Polygraphy:

  • Accuracy Concerns: PG results may not be as accurate or detailed as those obtained from PSG
  • Screening Matters: Without careful screening, PG measurements might deviate from reality.
  • Limited Scope: PG isn’t ideal for diagnosing other sleep disorders like central sleep apnea or insomnia.
  • Not Suitable for Elderly Individuals Living Alone: PG may not be the best choice for seniors who live independently.

What happens during a Polygraphy Test?

Sensors to be attached in a Polygraphy test

  • Measuring Device: A compact device, typically worn on the chest, connects to the sensors. It records and stores the data throughout the night.
  • Thoracic Abdominal Movement Belt (RIP): This belt wraps around the chest and abdomen. It measures the expansion and contraction of the chest and abdomen during breathing.
  • Cannula: Placed in the nostrils, the cannula monitors nasal airflow.
  • SpO2 Machine: A small device clipped to the patient’s index finger. It continuously checks oxygen levels during sleep.
  • Microphone: Records snoring sounds and other relevant indicators.
  • Additional Sensors: Depending on the specific device and doctor’s instructions, other sensors may be included.

Process in a Polygraphy test

https://www.youtube.com/watch?v=dS1eUWYkzOQ

Wondering what happens if you can’t sleep during a Polygraphy test?

How to prepare for a Polygraphy test?

  • Stick to Your Routine: Follow your usual sleep habits as you would at home. Maintain your regular sleep schedule and take your medications unless advised otherwise.
  • Watch Your Intake: On the day of the study, avoid coffee, tea, and alcohol. These substances can affect the accuracy of the test.
  • Prioritize Rest: Ensure you get a good night’s sleep before the test. Avoid staying up late or overexerting yourself.
  • Comfort Matters: Pack comfortable sleepwear—you’ll be spending the night in it.
  • Bring Distractions: If you have trouble falling asleep, consider bringing a book or magazine to help you relax during the study.”

The steps to prepare before a polygraphy test

Can I have a Polygraphy test at the Sleep Lab?

Polygraphy

Polygraphy offers a convenient and cost-effective method for assessing sleep apnea. However, before undergoing a respiratory polygraph, it’s essential to consult with a doctor or sleep specialist. This step ensures the accuracy of your measurement results.

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