Statement: Patients in the primary trial receive an Infusion of Perflutren Lipid Microspheres, whereas in the secondary trial subjects are implanted with a Meso BioMatrix Acellular Peritoneum Matrix.
Primary_evidence: INTERVENTION 1:    Definity Infusion   Infusion of Definity (Perflutren Lipid Microspheres)   Definity infusion: 3 ml of Perflutren Lipid Microspheres (Definity) mixed in 50 ml of saline is infused at a rate of approximately 4ml/min
Secondary_evidence: INTERVENTION 1:    Meso BioMatrix Acellular Peritoneum Matrix   All subjects had the Meso BioMatrix Acellular Peritoneum Matrix implanted along with a tissue expander during the first stage of breast reconstruction. After tissue expansion, the tissue expander was replaced with a breast implant during the second stage of reconstruction.