There are also courses for microsurgical care for RNs who can for replantation patients.
The above are for adults. When you get into peds and NICU you get several more speciality which might be a requirement rather than a merit badge.
Most of these RN certs require about 2000 hours of actual work experience in the specialty unit and the employer may expect you to have obtained at the very least the minimun knowledge on these exams. For the unit's accreditation, certification of all the RNs migth be highly encouraged. These certs are not for the new grad who just want more alphabet.
So is the Chest physicians conference.
Besides the national also have big state conferences every year. Another RT organization is Focus which has big conferences a couple times a year. Nurses get CEs for most RT conferences (at least the big ones). FOCUS Publications, Inc.
You can also check out the Critical Care nurses conferences.