Review of simulation model for education of point-of-care ultrasound using easy-to-make tools

Table 3 Special features of surrounding materials used in simulators

Surrounding materials	Available	Cost	Time	Durability and resusable	Infection	Coloring	Reality of the image	Reality of resistance	Need for additives
Gelatin based	Easy	More cheaper	Need more time (usually need refrigeration)	Weak	Relatively vulnerable	Easy	Very good	Relatively unrealistic	Often needed
			Approximately 2–3 h and can take up to 5 h
Agar based	Easy	Cheap	Relatively less time	Good	Relatively vulnerable	Easy	Good	Relatively unrealistic	Rarely needed
Ballistics gel based	Not difficult	Relatively expensive	Short preparation time (about 1 h)	Excellent	Resistant	Not difficult	NA	Great realism	Usually not required