4,529 research outputs found
The Financial and Professional Impact of Anterior Cruciate Ligament Injuries in National Football League Athletes.
BACKGROUND: Anterior cruciate ligament (ACL) injuries can have negative consequences on the careers of National Football League (NFL) players, however no study has ever analyzed the financial impact of these injuries in this population.
PURPOSE: To quantify the impact of ACL injuries on salary and career length in NFL athletes.
STUDY DESIGN: Cohort study; Level of evidence, 3.
METHODS: Any player in the NFL suffering an ACL injury from 2010 to 2013 was identified using a comprehensive online search. A database of NFL player salaries was used to conduct a matched cohort analysis comparing ACL-injured players with the rest of the NFL. The main outcomes were the percentage of players remaining in the NFL and mean salary at 1, 2, 3, and 4 years after injury. Cohorts were subdivided based on initial salary: group A,2,070,521 less per player than uninjured controls.
CONCLUSION: On average, ACL-injured players earned 2 million per year have lower mean salaries and are less likely to remain in the league than uninjured controls. The careers of players initially earning over $2 million per year, meanwhile, are not negatively affected. This demonstrates the degree of negative impact these injuries have on the careers of NFL players. It also indicates that a player\u27s standing within the league before injury strongly influences how much an ACL injury will affect his career
Corrective treatment and anatomic considerations for laparoscopic cholecystectomy injuries
BACKGROUND: Complete reports of biliary and vascular injuries after laparoscopic cholecystectomy are rare. STUDY DESIGN: Fifteen patients with complex laparoscopic cholecystectomy injuries underwent corrective operations. The injuries consisted of 14 bile duct injuries and one large laceration of a cirrhotic liver. Five of the bile duct injuries were accompanied by inadvertent occlusion of the right hepatic artery, and one was further complicated by portal vein occlusion. One hepatic artery occlusion and one portal vein occlusion were successfully reconstructed. Two patients with arterial occlusion required right hepatic lobectomy. Corrective biliary operations consisted of common hepaticojejunostomy (seven cases), right and left hepaticojejunostomies (one case), right anterior and left hepaticojejunostomies (two cases), right hepaticojejunostomy (one case), right posterior hepaticojejunostomy (one case), and left hepaticojejunostomy after right lobectomy (two cases). RESULTS: Except for a patient with a severe laceration of a cirrhotic liver who died as a result of hepatic failure, the remaining 14 patients are alive and well with normal hepatic function tests at six and 37 months after corrective operations. CONCLUSIONS: A knowledge of anatomy is critical to the prevention of injuries to the hepatobiliary tree and related structures during laparoscopic cholecystectomy
Turbulence and Droplet Clustering in Shallow Cumulus: The Effects of Aerosols and Cloud Height.
M.S. Thesis. University of Hawaiʻi at Mānoa 2017
LOX/Hydrocarbon Combustion Instability Investigation
The LOX/Hydrocarbon Combustion Instability Investigation Program was structured to determine if the use of light hydrocarbon combustion fuels with liquid oxygen (LOX) produces combustion performance and stability behavior similar to the LOX/hydrogen propellant combination. In particular methane was investigated to determine if that fuel can be rated for combustion instability using the same techniques as previously used for LOX/hydrogen. These techniques included fuel temperature ramping and stability bomb tests. The hot fire program probed the combustion behavior of methane from ambient to subambient temperatures. Very interesting results were obtained from this program that have potential importance to future LOX/methane development programs. A very thorough and carefully reasoned documentation of the experimental data obtained is contained. The hot fire test logic and the associated tests are discussed. Subscale performance and stability rating testing was accomplished using 40,000 lb. thrust class hardware. Stability rating tests used both bombs and fuel temperature ramping techniques. The test program was successful in generating data for the evaluation of the methane stability characteristics relative to hydrogen and to anchor stability models. Data correlations, performance analysis, stability analyses, and key stability margin enhancement parameters are discussed
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