Heart Biomarker Evaluation in Apnea Treatment

3.3.4.2 Preparation Guidelines

The following guidelines should be followed:

• Before starting the test, ask the subject if he needs to use the restroom.
• Loosen or remove any clothing with tight fitting sleeves and remove any heavy clothing.
• Ask the subject to lay down on his back in a comfortable position.
• Identify the best finger on each hand for testing-use the index fingers when possible. Avoid fingers with clear deformities. Use the same finger on each hand. Any finger can be used other than the thumb.
• Ensure that fingernails on the fingers to be tested are short and trim if they protrude more than 1/6 inch (4 mm from the tip of the finger).
• Have the participant remove all jewelry, watches, etc. and place in a secure location.