High-fidelity models closely emulate human anatomy in look and feel, using materials that replicate real tissues such as soft, slightly elastic skin, firm but flexible muscles or organs with natural textures. Their tiny yet precise details include visible veins in an arm model or pink gums with realistic tooth enamel for dental models; some even match human tissues in color to further add to realism.
Low-fidelity models are simplified, using only basic shapes. These models may be constructed of hard plastic, foam or fabric without intricate details; an example would be an entry-level CPR model that has only enough parts for practicing chest presses but no realistic skin or organs; an entry level suturing model might only include fabric-like material to stitch upon;
High-fidelity models contain interactive features to replicate real medical situations. A trauma model might "bleed" with the use of a small fluid pump when cut or have its heartbeat speed up when pressed incorrectly; others connect to computers to give feedback--for instance showing whether needle insertion was successful into vein, while emergency models may even simulate complications like blocked airways.
Low-fidelity models typically feature non-feedback functions. A blood pressure model might only contain an arm to wrap a cuff around, with no real pulse or way to measure correctly. A basic dental model allows users to practice brushing but will not inform them if their movements miss any spots or press too hard.
Training Utilisations High-fidelity models provide advanced, realistic training. This type of model is great for medical students finishing their studies or doctors learning new skills (like laparoscopic surgery). A high-fidelity abdominal model can be used to practice removing an organ while simulating cutting tissue and avoiding blood vessels. They're also ideal for team training sessions that simulate handling an "attack patient".
Low-fidelity models are great ways for beginners to master basic skills. They're ideal for teaching newcomers how to hold a stethoscope, wrap a bandage or perform simple CPR presses; similarly a low-fidelity mouth model helps first year dental students practice cleaning techniques without all the complications that real teeth and gums present.
Cost and Maintenance
Due to their technology and attention to detail, high-fidelity models tend to cost thousands of dollars more. Furthermore, their upkeep requires frequent adjustments, such as adding "blood" fluid refills or fixing broken pumps or updating software updates.
Low-fidelity models are typically inexpensive (tens or hundreds of dollars), durable, and easy to keep clean (just wipe with a cloth), making them great for classroom environments where multiple students use them at once.
Short version: High-fidelity models are best used for realistic and advanced practice while lower fidelity ones serve simple beginner training. There is no "better" choice; rather it depends on what skills need to be developed.