A medical device (420; 620) for forming a pathway from an external orifice to a bodily opening defined by tissue of an internal bodily lumen, the medical device (420; 620) comprising: a flexible sheath (424; 624) having a length suitable for forming the pathway, the flexible sheath (424; 624) having a distal portion (428; 628) that is collapsible; and an expandable frame (422; 622) connected to the distal portion (428; 628) of the sheath (424; 624), the expandable frame (422; 622) operable between a collapsed configuration and an expanded configuration, the expandable frame (422; 622) expanding radially from the collapsed configuration to the expanded configuration; the expandable frame (422; 622) including a first cage (422a; 522a; 622a) having a proximal segment (432; 532; 632) and a distal segment (434; 534; 634) connected together by intermediate hinges (446; 546; 646), the proximal segment (432; 532; 632) connected to the flexible sheath (424; 624), the distal segment (434; 534; 634) projecting distally beyond the distal portion (428; 628) of the flexible sheath (424; 624); characterized in that the first cage (422a; 522a; 622a) is formed by a single wire (440; 540; 640) bent into a configuration defining the proximal segment (432; 532; 632), the distal segment (434; 534; 634) and the intermediate hinges (446; 546; 646), wherein each of the intermediate hinges (446; 546; 646) is formed by a bend in the wire (440; 540; 640) located between the proximal and distal segments (432, 434; 532, 534; 632, 634); and in that the distal segment (434; 534; 634) rotates radially outwardly relative to the proximal segment (432; 532; 632) about the intermediate hinges (446; 546; 646) when the expandable frame (422; 622) expands radially from the collapsed configuration to the expanded configuration. a flexible sheath (424; 624) having a length suitable for forming the pathway, the flexible sheath (424; 624) having a distal portion (428; 628) that is collapsible; and an expandable frame (422; 622) connected to the distal portion (428; 628) of the sheath (424; 624), the expandable frame (422; 622) operable between a collapsed configuration and an expanded configuration, the expandable frame (422; 622) expanding radially from the collapsed configuration to the expanded configuration; the expandable frame (422; 622) including a first cage (422a; 522a; 622a) having a proximal segment (432; 532; 632) and a distal segment (434; 534; 634) connected together by intermediate hinges (446; 546; 646), the proximal segment (432; 532; 632) connected to the flexible sheath (424; 624), the distal segment (434; 534; 634) projecting distally beyond the distal portion (428; 628) of the flexible sheath (424; 624); characterized in that the first cage (422a; 522a; 622a) is formed by a single wire (440; 540; 640) bent into a configuration defining the proximal segment (432; 532; 632), the distal segment (434; 534; 634) and the intermediate hinges (446; 546; 646), wherein each of the intermediate hinges (446; 546; 646) is formed by a bend in the wire (440; 540; 640) located between the proximal and distal segments (432, 434; 532, 534; 632, 634); and in that the distal segment (434; 534; 634) rotates radially outwardly relative to the proximal segment (432; 532; 632) about the intermediate hinges (446; 546; 646) when the expandable frame (422; 622) expands radially from the collapsed configuration to the expanded configuration.