Choose Location

We provide care in three easily-accessible locations across the Rio Grande Valley.


1604 East 8th St., Suite A
Weslaco, TX
Phone: (956) 447-5557


5300 North McColl Rd., Suite 100
McAllen, TX
Phone: (956) 630-1000


1022 E. Griffin Pkwy.
Mission, TX 78572
Phone: (956) 833-6000


Adaptive Servoventilation (ASV)

ASV is a treatment targeting Cheyne-Stokes Breathing (CSB), a pattern of slow waxing and waning of respiratory effort and airflow. However, this approach can also be effective for any patient manifesting central respiratory events accompanied by low CO2 levels (hypocapnia). ASV delivers higher pressure support during central respiratory events to stabilize ventilation and CO2 levels in the blood.

How Do You Know If You Need ASV?

ASV is one treatment for certain sleep disorders. A sleep study at one of our accredited sites in Weslaco and McAllen can help you determine whether you have a sleep disorder and whether ASV might help. During these studies, which take place in our modern, safe, and secure sleep labs, your rest will be carefully monitored. Our sleep specialists will record your brain waves, eye movements, muscle activity, breathing effort and airflow, blood oxygen level, heart rate and rhythm, the duration of your stages of sleep, body positions, and movements of your arms and legs while sleeping. Once your sleep study is complete and has been scored, your sleep specialist will analyze the results to determine whether you require ASV or any other treatment for a sleep disorder.

ASV Treatment

ASV is used to treat many patients who manifest the high ventilatory drive and ventilatory control instability. The pressure support (the I-E difference) of ASV devices treats such patients by providing higher pressure support (larger I-E differences) when flow and tidal volume are decreased (e.g., during a central respiratory event), and lower pressure support (a smaller I-E difference) when flow and tidal volume are increased. The result is the stabilization of the patient’s ventilation by eliminating central apnea affected by excessive ventilation and low CO2 levels in the blood.

ASV has been shown to be useful in treating central sleep apnea with Cheyne Stokes Breathing, primary central sleep apnea, PAP-emergent central sleep apnea, and narcotic-induced central sleep apnea.