Tissue expanders having fill port assemblies and drain port assemblies that are isolated from one another for preventing cross-contamination of fluids

A tissue expander having a fill port assembly and a drain port assembly, said tissue expander comprising:

• a shell including an anterior wall having a superior zone and an inferior zone;
• one or more drainage openings formed in the inferior zone of said anterior wall of said shell;
• a fill port assembly located within the superior zone of said anterior wall of said shell;
• a drain port assembly located within the inferior zone of said anterior wall of said shell that is in fluid communication with the one or more drainage openings formed in the inferior zone of said anterior wall of said shell,
• a drain cover including an elongated body having a first end and a second end, a drain port hub that is centrally located between the first and second ends of said elongated body, one or more fluid reservoirs located between the first and second ends of said elongated body, and an outer face that surrounds said one or more fluid reservoirs, wherein said outer face of said drain cover is secured to an inner surface of said anterior wall of said shell within the inferior zone of said anterior wall, wherein said outer face of said drain cover surrounds said one or more drainage openings, and wherein said one or more fluid reservoirs are aligned with said one or more drainage openings formed in the inferior zone of said anterior wall of said shell;
• wherein said fill port assembly that is located within the superior zone of said anterior wall of said shell is isolated from said drain port assembly that is located with the inferior zone of said anterior wall of said shell.

A tissue expander having a fill port assembly and a drain port assembly, said tissue expander comprising:

• a shell including an anterior wall having a superior zone and an inferior zone;
• one or more drainage openings formed in the inferior zone of said anterior wall of said shell;
• a fill port assembly located within the superior zone of said anterior wall of said shell;
• a drain port assembly located within the inferior zone of said anterior wall of said shell that is in fluid communication with the one or more drainage openings formed in the inferior zone of said anterior wall of said shell, wherein said fill port assembly that is located within the superior zone of said anterior wall of said shell is isolated from said drain port assembly that is located with the inferior zone of said anterior wall of said shell;
• said tissue expander being implanted in breast tissue of a patient so that said fill port assembly is located in superior breast tissue that is closer to an upper end of the patient and said drain port assembly is located in inferior breast tissue that is closer to a lower end of the patient.