Air in Chest Cavity After Augmentation, Should I Be Concerned?

This Is perfectly normal and will disappear in the next few weeks. It is from air and fluid (irrigation, local anesthetic, serum, etc) in the pocket which will be naturally absorbed over time.

The presence of free air within the
chest cavity is a potentially life threatening situation.This condition is known as a pneumothorax and
may require surgical intervention. Fortunately,
the symptoms that you describe are most likely related to fluid and air within
the breast implant pocket.This
situation commonly occurs in the immediate post-operative period in patients
who have undergone breast augmentation. They
typically note a sloshing, squeaking or gurgling sound as the implant moves
around the pocket.This gradually
resolves over the course of time as the fluid and air are reabsorbed.This usually occurs in 4-6 weeks without any
intervention.If
you’re concerned about this sensation, consultation with your plastic surgeon
is appropriate.Your plastic surgeon
should be able to address your concerns and alleviate your anxiety.

give it time.  many people hear a sloshing sound or some crunchiness after augmentation. it will go away  . be patient.

Air in the tissue that you can feel, like crackling bubbles, is common and resolves slowly over time.  Unless you are short of breath, I would accept this as normal.  Air in the pocket around the implant can cause strange noises. This is also common and will resolve over time.....not to worry.  All the best, "Dr. Joe" Gryskiewicz 

Most likely you are hearing and/or feeling some residual air in the breast pocket (technically different than the chest cavity) which is common and can takes several weeks to resolve.  It is fairly common and should stop on its own in the near future.