A dialysis catheter is a catheter used for exchanging blood to and from a hemodialysis machine and a patient. The dialysis catheter contains two lumens: venous and arterial. This terminology is confusing, because both lumens are in the vein.
In order to practice as a dental hygienist, one needs a degree from a dental hygiene school and a state license. To become licensed, dental hygienists need to pass a clinical and written exam.
They also look for signs of gum disease and other oral problems, take and develop X-rays, apply sealants to protect teeth, and instruct patients on oral hygiene. Dental hygienists typically need at least an associate's degree to practice, although bachelor's and master's degrees are available to those interested in research or teaching. All states require licensing, which typically requires education, and passing written and practical exams.