| 摘要 |
Double lumen tubing (10) having a substantially circular cross-section and comprising a tubular wall (12), each extending about a longitudinal central axis of the tubing (12), and having a wall thickness being defined between the outer surface (14) and the inner surface (16). The tubing (10) comprises an inner wall (18) inside the tubing (10) for dividing it into a first (20) and a second (22) lumen, the inner wall (18), and each lumen (20;22) comprising a cross section with an arcuated portion (24;24') and a substantially plane portion (26;26') opposite to the arcuated portion (24;24'), the plane portions (26;26') of the lumens (20;22) lying adjacent to one another. Further, a centre region (30) of the arcuated portion (24;24') of the cross section of at least one of the first (20) or second (22) lumen, and the regions (39) where the tubular wall (12) meets the inner wall (18), have a wall thickness that is smaller than the wall thickness of two tubular wall regions (32;34) located left and right of said centre region (30). |
