Less commonly, cystitis may occur as a reaction to certain drugs, radiation therapy or potential irritants, such as feminine hygiene spray, spermicidal jellies or long-term use of a catheter. Cystitis may also occur as a complication of another illness. The usual treatment for bacterial cystitis is antibiotics.
The maneuver is based on the fact that when a patient forcibly exhales against a closed nose and mouth while bearing down, as if having a bowel movement, specific changes occur in blood pressure and the rate and volume of blood returning to the heart.
MANEUVERING IN SPACE 49. To maneuver, a satellite in orbit must use rocket engines (thrusters) to change. the magnitude or direction of its velocity. Because the orbital speed of satel-. lites is so large, the velocity changes required for maneuvering may also be.