Arthroscopy elbow, wrist, ankle, foot, and hip. Knee arthroscopy, or arthroscopic knee surgery, is an ineffective surgery that uses arthroscopic surgical techniques. People who undergo this surgery for "wear and tear" joint pain, including osteoarthritis and meniscal tears, usually have high hopes for the results, but repeated scientific studies have show that they actually end up with results that are no better than if they had skipped all of the pain, disruption, and risks of the surgery and instead only did the many hours of required post-surgery physical therapy. It has, in many cases, replaced the classic open surgery (arthrotomy) that
Effect of spaceflight on the human body space propulsion systems have been examined for over a century, and millions of man-hours of research have been spent on them. In recent years there has been an increase in research on the issue of how humans can survive and work in space for extended and possibly indefinite periods of time. This question requires input from the physical and biological sciences and has now become the greatest challenge (other than funding) facing human space exploration. A fundamental step in overcoming this challenge is trying to understand the effects and impact of long-term space travel on the human body. In October