Hydrogel structure, blood vessel, internal organ model, practice tool for medical procedure, and method of manufacturing the hydrogel structure

A method of manufacturing a hydrogel structure including a hollow tubular structure, comprising:

• forming a pillar-like core part with a core part forming material;
• covering the pillar-like core part with a hydrogel forming material to form a tube-like portion;
• and
• removing the pillar-like core part,
• wherein the hydrogel forming material has a transmission of 80 percent or more in a visible light range, and wherein one of the following conditions are met:
• (i) the hollow tubular structure comprises a first hydrogel object and is at least partially adjacent to a second hydrogel object having a modulus of elasticity different from that of the first hydrogel object, or
• (ii) the hollow tubular structure comprises at least two kinds of hydrogel objects having different modulus of elasticity.

A method of manufacturing a hydrogel structure including a hollow tubular structure, comprising:

• forming a pillar-like core part with a core part forming material including an active energy ray curable composition;
• and
• covering the pillar-like core part with a hydrogel forming material to form a tube-like portion,
• wherein a cured object of the active energy ray curable composition is liquefied by heat,
• wherein the hydrogel forming material has a transmission of 80 percent or more in a visible light range, and wherein one of the following conditions are met:
• (i) the hollow tubular structure comprises a first hydrogel object and is at least partially adjacent to a second hydrogel object having a modulus of elasticity different from that of the first hydrogel object, or
• (ii) the hollow tubular structure comprises at least two kinds of hydrogel objects having different modulus of elasticity.