Yes, you could. This is not uncommon where an accident occurs and serious trauma results. The police on the scene do not have the ability to conduct the field sobriety tests because of the injuries. The police based on an examination of the scene, witness statements and observations of you could charge you with OUI and then the District Attorney could obtain the hospital records through subpeona. If you receive a summons contact this office or a qualified criminal defense lawyer.
You may, contact a personal injury lawyer immediately. You need a theory of liability and all or one of the facts you cite may be sufficient to make a liability argument. In addition, there may be others, you should speak to a competent personal injury attorney in your area.
If this happened at work or on the job then you would have a Workman's compensation claim. If it was your hammer and you were working on your own personal time then you may have a products liability claim. The intended use of a hammer is to strike objects. It ought not to shatter. Therefore, a good lawyer might argue that it was defective or under the UCC - not fit for a particular purpose. Keep the hammer parts, along with the receipt (as the store in which you purchased it from may be a...
You should consult a qualified personal injury attorney immediately to assist you in evaluating your case. The fractured sternum and the nerve issues are of primary concern. You as spouse also have a loss of consortium claim. Your lawyer should refer you to a specialist to determine long term prognosis and degree of permanency and disability.
If you are trying to relate the gallstones to your workmans compensation claim you will need an expert to do so. In other words a physician would have to give a medical opinion that it was related to the trauma. Talk to you lawyer again and see if your physicians agree with your diagnosis. If not, perhaps your lawyer can refer you to another Doctor for a second opinion. Last resort may be seeking a second legal opinion on the issue. Good luck.
It is always difficult to answer this type of question with out being fully apprised of all the facts and knowing the parties involved. Having said that you should speak to your lawyer. If the interview went well and you said nothing that was harmful to liability or damages then don't worry about it.