What is the best tablet case for use by patients in a medical environment?

I'm working on a tablet-based app (iPad) used by patients to quickly register upon arrival to a clinic or doctor's office. The tablets will be kept at the front desk, handed out for registration, then returned for the next person.

I'm hoping to hear from someone who has experience in this scenario and tried different options, or found one that has worked well for users.

Expectations/considerations:

• Charging should be possible without removing the case
• Cleaning should be easy, preferably without removing the case
• Open to the idea of a standing kiosk setup if someone has seen better user satisfaction going that route