I have the unfortunate experience of dealing with SAIF. I would recommend that you speak with a OMBUDSMAN for injured workers. During my 7 years and counting, found them to be the best resource. I had no idea Oregon even had such a thing until my Aunt said they had such a person in CA and OR might have someone too. I am sorry to hear that you and your husband are dealing with SAIF.
In my experience with 2 claims working on 3rd, SAIF responds better if you have a lawyer. I did not have a lawyer for my first claim, thought about it but figured SAIF would look out for me. I had a lawyer for the 2nd claim and she was great she used to work for the insurance companies and knew the "ins and outs". I found that the lawyers only get paid if there is a settlement in your favor, and only take a percentage of the award.
My experience with this 3rd issue has been without a lawyer denial of the additional request to the claim. Once I had a lawyer the IME took place which was 5 months after my injury and the doctor did not have time to go through my pages and pages of SAIF paperwork. I told him my surgeon was requesting an artificial disc and his report basically went on about how artificial discs are not approved to be placed next to a level with a fusion. Because my lawyer knew the game he has since gotten a second IME scheduled to break the tie between what my doc wants for me and what the IME doc said.
SAIF prefers to settle rather than go to court so they are currently trying to see how to settle my claims and any future issues I may have. I wish you the best in your claim and hope that you get the attention you need. I would also suggest looking into other discussion forums like spine-health.