Medical elongated body

A medical elongated body comprising:

• a tubular main body comprising a lumen extending in an axial direction of the tubular main body and extending throughout the tubular main body, the tubular main body possessing an outer surface, the tubular main body comprising a first portion, a second portion and a third portion in the axial direction, the second portion being immediately adjacent and distal to the first portion, the third portion being immediately adjacent and distal to the second portion;
• a hub connected to the first portion of the tubular main body;
• a temperature responsive lubricating coating layer which exhibits a first lubricity when wetted by a first fluid whose temperature is lower than a critical temperature and exhibits a second lubricity when wetted by a second liquid whose temperature is equal to or higher than the critical temperature, the temperature responsive lubricating coating layer directly contacting the outer surface of the tubular main body along at least the second portion of the tubular main body;
• a hydrophilic lubricating coating layer which possesses a third lubricity when wet, the hydrophilic lubricating coating layer directly contacting the outer surface of the third portion of the tubular main body;
• the second lubricity imparting greater frictional resistance than the first lubricity when the tubular main body moves within a living body;
• and
• the second lubricity imparting greater frictional resistance than the third lubricity when the tubular main body moves within the living body.

A method comprising:

• inserting an elongated tubular body into a living body, the elongated tubular body comprising an outer surface, the elongated tubular body comprising a first portion and a second portion, the second portion being immediately adjacent and proximal to the first portion in an axial direction, the first portion of the elongated tubular body possessing a first frictional resistance, the second portion of the elongated tubular body possessing a second frictional resistance;
• increasing the frictional resistance of the second portion of the elongated tubular body when the elongated tubular body is positioned in the living body so that the frictional resistance of the second portion positioned in the living body increases from one frictional resistance to a greater frictional resistance while at the same time not increasing the frictional resistance of the first portion of the elongated tubular body when the elongated tubular body is positioned in the living body;
• and
• fixing the second portion of the elongated tubular body at a location in the living body by friction created between the second portion of the elongated tubular body and a portion of the living body, the fixing of the second portion of the elongated tubular body occurring after the increasing of the frictional resistance of the second portion of the elongated tubular body.