TUBE WITH PROPERTIES PREVENTING NARROWING Russian patent published in 2015 - IPC A61F2/82 A61F2/88 A61F2/962 A61F2/966 A61F2/90 A61M25/00 

FIELD: medicine.

SUBSTANCE: tubular structure having a long axis comprises a winding of at least one film inclined at a first angle 'X' of the winding, and the winding of at least one film which inclined at a second angle 'Y' of the winding. The both windings have the same directions. The angle 'X' and the angle 'Y' fall within the range of 0 to 90 degrees in relation to the tubular structure axis. The angle 'X' differs from the angle 'Y', and they are directed so that an inner angle in between is sharp. When an axial force is applied to the tubular structure, the angle 'X' and the angle 'Y' decrease in relation to the long axis, while the sharp inner angle between the angles 'X' and 'Y' increase. The invention can be used to avoid the narrowing problems occurring in many state-of-the-art tubular devices, and to provide additional advantages, which can ensure a diameter increase accompanying an axial elongation. Thereby, the invention can be effective as a production aid as an enclosure (e.g. for medical device delivery) and in other applications, wherein an easy removal of the tubular enclosure can be effective.

EFFECT: improvement of the device.

9 cl, 11 dwg