Shaft constructions for a medical device

A medical device comprising a shaft, the shaft comprising:

• a rolled sheet of flexible material having a first longitudinal edge, a second longitudinal edge, an outer surface, and a sheet surface between the first and second longitudinal edges that forms an inner shaft surface,
• the first and second longitudinal edges of the sheet being joined in abutment to form a single seam extending along a length of the shaft,
• the sheet surface including a plurality of longitudinal ribs such that the rolled sheet forms a plurality of lumens within the shaft with the ribs separating the plurality of lumens from one another;
• a plurality of holes;
• a plurality of elongated members, each of the plurality of members extending within each of the plurality of lumens and including a conductor;
• and
• an electrode;
• wherein all or a portion of the first longitudinal edge joins to the second longitudinal edge;
• each of the plurality of ribs include a base and a peak, the base of each spaced apart from one another and each rib joined to one another in proximity to their peaks;
• the inner surface and the outer surface of the shaft form a wall;
• the plurality of holes, formed through the wall, provide communication between one or more of the plurality of lumens and an area in proximity to the outer surface of the shaft;
• and
• the electrode, formed about the outer surface of the shaft, couples to the conductor at a first location via a first hole of the plurality of holes.

A method for making a shaft included in a medical device, the method comprising:

• forming a flexible sheet comprising a first longitudinal edge, a second longitudinal edge, an inner surface, and an outer surface, each extending along a length of the sheet the inner surface including a plurality of longitudinal ribs disposed in between, and substantially parallel to the first and second longitudinal edges;
• disposing a plurality of elongated members on the inner surface, each of the plurality of members alongside one of the plurality of ribs such that the plurality of elongated members extends in a direction substantially parallel to the plurality of ribs;
• and
• rolling the sheet to form the shaft such that the first longitudinal edge and the second longitudinal edge come approximately together and the inner surface forms a plurality of lumens, the plurality of lumens separated from one another by the plurality of ribs and each of the plurality of elongated members extending within one of the plurality of lumens.

A medical device comprising a shaft, the shaft comprising:

• a rolled sheet of flexible material having a first longitudinal edge, a second longitudinal edge, an outer surface, and a sheet surface between the first and second longitudinal edges that forms an inner shaft surface,
• the first and second longitudinal edges of the sheet being joined in abutment to form a single seam extending along a length of the shaft,
• the sheet surface including a plurality of longitudinal ribs such that the rolled sheet forms a plurality of lumens within the shaft with the ribs separating the plurality of lumens from one another;
• one or two elongated members, at least one of the members extending within one of the lumens;
• and
• the rib includes a peak, the peak joined in proximity to the seam.