A Level 3 (L3) Sleep study is conducted in your home. The device provided records your oxygen levels, heart rate, airflow, snoring and other parameters while you are asleep.

Level 3 (L3) Home Sleep Test Set-up instructions. Finger sensor used: slip-on type

Level 3 (L3) Home Sleep Test Set-up instructions. Finger sensor used: Sensor with tape

A Level 4 (L4) test refers to Sleep Apna Screening with Oximetry, which measures blood oxygen levels; this test may also include measuring heart rate. Level 4 studies is usually used to test for Pediatric Sleep disorders.

Level 4 (L4) Home Sleep Test Set-up instructions.