You may have a case. Medical malpractice means that a doctor violated the standard of care. A bad outcome is not enough. Another doctor would be...

Use the Avvo search tool to find an attorney. https://www.avvo.com/find-a-lawyer

Medical malpractice means that a doctor violated the standard of care. A bad outcome is not enough. Another doctor would be needed to evaluate...

You have a claim you can make against the store and manufacturer of the product.

It depends on the specifics of what he says.

Depending on what the waiver said, you may be excluded from any recovery.

If a judgment was entered against you, they can take the money. You may want to repost your question with clarification.

File a lawsuit in small claims court or have an attorney review sales agreement.

A civil litigation, lawsuit attorney. Use the Avvo search tool to find an attorney. https://www.avvo.com/find-a-lawyer

An amended complaint must be answered by the defendant.