Without variable valve timing or variable valve lift, the valve timing must be the same for all engine speeds and conditions, therefore compromises are necessary. An engine equipped with a variable valve timing actuation system is freed from this constraint, allowing performance to be improved over the engine operating range.
A variety of medical specialists treat people with osteoporosis, including internists, gynecologists, family doctors, endocrinologists, rheumatologists, physiatrists, orthopaedists, and geriatricians. There are a number of ways to find a doctor who treats osteoporosis patients. If you have a primary care or family doctor, discuss your concerns with him or her. Your doctor may treat the disease or be able to refer you to an osteoporosis specialist.
A consultant rheumatologist is a doctor who specialises in diagnosing and treating arthritis and diseases related to rheumatology.There are over 200 different diseases that affect the joints, bones, muscles and other soft tissues. rheumatologist will arrange for you to have tests to find out more about your condition. These may include blood tests and x-rays. If there are complex results from these tests your rheumatologist may discuss them with specialist colleagues.