Vane Air Flow Meters. A vane air flow meter (also known as a âflap styleâ meter and a VAF sensor) is an early type of air flow meter that measures air intake volume. This type of meter uses a spring-loaded flap that is attached to a variable resistor. As air enters, it pushes against the flap or plate opening it.
Bladder stones can be removed surgically by a cystotomy, opening of the bladder. Stones lodged in the urethra can often be flushed into the bladder and removed, but sometimes a urethrotomy is necessary.ladder stones can be removed surgically by a cystotomy, opening of the bladder. Stones lodged in the urethra can often be flushed into the bladder and removed, but sometimes a urethrotomy is necessary.
Other Approaches That Can Help Prevent and Treat Kidney Stones. Kidney stones can range in size from a grain of sand to a golf ball. If you do get a large kidney stone, naturally you will not be able to pass it without some type of intervention. In the past they had to do surgery to physically remove these larger stones, but now there are some more advanced options such as extracorporeal shockwave lithotripsy.