The Mars Science Laboratory mission had a total launch mass, including the Atlas V-541 that lifted it away from Earth, of about 531,000 kilograms (1.17 million pounds). The integrated Mars 2020 flight system is similar in size and mass to its predecessor, the Mars Science Laboratory mission. When mission planners are choosing among different launch vehicles, they consider how much mass each launch vehicle can lift into space. This favorable position of the planets means that it takes less launch energy to get to the Red Planet compared to other times when Earth and Mars are in different positions in their orbits around the sun. © 2015 Australasian College for Emergency Medicine and Australasian Society for Emergency Medicine.The Mars 2020 mission was designed to launch at a time when Earth and Mars are in positions in their orbits that is advantageous for spacecraft traveling to and landing on Mars. Placing the patient's knee over the shoulder, and holding the lower leg like a 'Rocket Launcher' allow the physician's shoulder to work as a fulcrum, thus mechanically and ergonomically superior to standard techniques.ĭislocation hip launcher reduction rocket. We have described a reduction technique for posterior hip dislocations. There were no neurovascular or periprosthetic complications. When compared with Allis (62% success rate), Whistler (60% success rate) and Captain Morgan (92% success rate) techniques, there was no statistically significant difference in the successfulness of the reduction techniques. The one patient who the 'rocket launcher' failed in, was a hemi-arthroplasty patient who also failed all other closed techniques and needed open reduction. Of our patients, the mean age was 74 years (range 66 to 85 years). We used Fisher's t-test for cohort analysis between reduction techniques. The technique involves placing the patient's knee over the shoulder, and holding the lower leg like a 'Rocket Launcher' allow the physician's shoulder to work as a fulcrum, in an ergonomically friendly manner for the reducer. We present our results with six patients with prosthetic posterior hip dislocation treated in our rural ED. We provide a review of literature on reduction techniques for posterior hip dislocations and present our experience with a novel technique for the reduction of acute posterior hip dislocations in the ED, 'the rocket launcher' technique.

What is a rocket launcher