Coaxial needles and biopsy devices for performing a biopsy

A coaxial needle comprising:

• a cannula having a distal end and a proximal end;
• a first inflatable member surrounding the cannula in a circumferential direction and having a length extending from the distal end to the proximal end of the cannula, the first inflatable member having a first inflated state and a first deflated state;
• and
• a stylet comprising:
• an elongate member having a first end and a second end, and
• a second inflatable member coupled to the second end of the elongate member, the second inflatable member having a second inflated state and a second deflated state.

A method of performing a biopsy comprising:

• inserting a coaxial needle into a target site, the coaxial needle including a cannula having a proximal end and a distal end;
• inflating a first inflatable member which surrounds the coaxial needle in a circumferential direction and extends from the proximal end of the cannula to the distal end of the cannula;
• inserting a biopsy needle in the cannula of the coaxial needle and acquiring samples from the target site, such that a biopsy void is created in the target site;
• removing the biopsy needle from the cannula of the coaxial needle inserting a stylet that includes an elongate member having a first end and a second end in the cannula of the coaxial needle;
• and
• inflating a second inflatable member located on the second end of the elongate member of the stylet in the biopsy void created in the target site.