Good Morning and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
It is unlikely that this needle that bent damaged the suspensory ligament. It is not uncommon for a horse to move suddenly during this process and the needle can be bent and cause some minor scar tissue due to this. It is odd that there is swelling in this area but if it is from this very tiny needle, it will be minor. There also may have been a trailer injury when moving Ione to the facility that you were not aware of and this swelling came up after the nerve block.
Personally, I have never seen any problems such as you describe after a nerve block even when the horse moves suddenly. Hopefully, this will only be a minor problem that can resolve on its own.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please REPLY so I can clarify for you.
Sincerely, Dr. Loretta