Trial Search Results

Effects of Different Tidal Volume Ventilation Strategies on Fontan Flow and Hemodynamics

In patients with Fontan circulation blood is not pumped to the lungs from a ventricle. Instead the superior vena cava and inferior vena cava is connected to the pulmonary artery and blood flow to the lungs occurs passively along this Fontan pathway. This passive blood flow to the lungs occurs best when the patient is breathing on their own (spontaneous ventilation). However for certain surgeries and procedures patients need to have an endotracheal tube inserted and need to be muscle relaxed and receive positive pressure ventilation. Prior studies have shown that positive pressure ventilation can reduce blood flow to the lungs and consequently blood returning to the heart resulting in less blood pumped out to the rest of the body (cardiac output). The purpose of this study is to investigate if changing the volume of the positive pressure ventilation (tidal volume) affects blood flow to the lungs and cardiac output in patients with Fontan circulation.

Stanford is currently accepting patients for this trial.

Lead Sponsor:

Stanford University


  • Other: Small volume breath and fast breathing rate for 5 minutes
  • Other: Large volume breath and slow breathing rate for 5 minutes




Inclusion Criteria:

   1. Age 2- 50 years of age

   2. Patients with Fontan circulation undergoing cardio-thoracic surgery or undergoing
   cardio-thoracic surgery for completion of Fontan circulation.

Exclusion Criteria:

1. Patients presenting for cardio-thoracic surgery without Fontan circulation or those not
coming for completion of Fontan circulation.

Ages Eligible for Study

2 Years - 50 Years

Genders Eligible for Study


Now accepting new patients

Contact Information

Stanford University
School of Medicine
300 Pasteur Drive
Stanford, CA 94305
Manchula Navaratnam, MD