Bjork-Shiley valve

Every year, thousands people get heart valve replacements. There are multiple options for replacement valves that can be generalized as either mechanical or biological. One of the mechanical options from the 1970s and 1980s was the Bjork-Shiley valve, which became infamous because of the controversy surrounding its stress fracture failures. These failures resulted the death of about 400 people, causing the valve to be taken off the market. The decisions made leading to this issue must be examined using various ethical frameworks so that an incident like this will not occur in the future. Ultimately, the FDA should require either third party or FDA in-house testing in order to ensure the safety of a medical device before it is approved for market,…

“Students who are pressured to be number one live in between dreams and reality” (ibighit, 2013). The song I chose is titled, “N.O,” sung by South Korean hip-hop group, BTS. In both the music video and in the lyrics for N.O, BTS showcase how they want youth to overthrow goals that others have set for them, and start to find their own happiness. Hence the lyrics, “Everybody say NO! It can’t be any later. Don’t be trapped in someone else’s dream” (ibighit, 2013). The music video shows the…

Why do I GIVE? I GIVE because I am frightened and worried I don’t want him to feel tired all the time I don’t want his ankle swollen anymore I don’t want him to become progressively confused I want him to play soccer, get detention, mend his broken heart, land his first job after college… I GIVE because I am a father who loves his son I GIVE because I have two and I only need one. Why do I GIVE? I GIVE because I grew up with love It breaks my heart to see her have high fevers It breaks…

The Electrocuted Man One stormy night, as I was out walking just outside of Lime Spring, Iowa, lightning began flashing every second across the sky. The wind developed a creepy whistle to it. Whoooo! Whooo! While I walked across the bridge over the Upper Iowa River, the water started to rise. Higher and higher every second. Soon the water was over the bridge. I started to run full sprint, so I wouldn’t get caught in the rushing water. As I was running, I came to a halt. The rain was still…

labquest and set up for new data collection. Rubber stopper assembly obtained and connected to plastic tubing and valves. Connector attached at free end of tubing to the gas pressure sensor with a clockwise turn. Two-way valve left open. Rubber-stopper assembly inserted tightly into the 125 mL Erlenmeyer flask. Closed the two way valve so it was perpendicular with valve stem. Mode changed to selected events on labquest. Graph settings changed to display pressure vs. temperature graph,…

Would you believe that in most first time cases of home roofing repair, the leak is actually made worse? Or worse yet, in a good many cases, the attempt to repair one leak only leads to the creation of even more leaks? So read on and learn a few tips from the pros, on how you can get it right the first time. Water Can Travel Under a Roof Leak The very first thing you have to do if you have water dripping down through your ceiling, is determine where the leak is coming from. You see once water…

What is Likely Clogging Your Drain? From teenagers who brush their hair a little too harsh to toddlers flushing action figures down the toilet even to grease going down the drain after dinner. We have all been there - stressing over how to unclog the drain. Hair in the Shower It is bound to happen, losing hair is as natural as it is growing it but, some of us lose a little more than average and that can be a problem with your drains. Take a moment if you notice clumps of hair in the shower to…

Harry Reid was born on December 2, 1939 in Searchlight, Nevada. Harry was the third of four sons born to a modest family. His mother’s name was Inez Orena, and his father Harry Vincent Reid was a miner. Reid’s home had no indoor toilet, telephone, or hot water. Harry Reid committed himself to education at a young age. Since there was no local school in Searchlight, Nevada Reid went to live with relatives in Henderson, Nevada in order to attend high school. Reid was involved in football, and…

Before calling a plumber in Arlington, check the water pressure at other faucets. If the water pressure is low only at a single faucet, first ensure the shut off valve is open. Next, inspect the aerator for clogging due to hard water sediment. Soaking in vinegar and scrubbing with a soft brush should correct the problem. Otherwise, replace the aerator. While the aerator is off check the water pressure at the faucet. If low, a problem is affecting the faucet. Faucets receive significant use,…

The valves were set up so that the water would flow from Tank 2, through the ½” nominal diameter, type L copper pipe, through the needle valve WV5 (Appendix A), and back to Tank 2. WV5 was initially closed. The Honeywell STD 924 DP meter’s pressure tap lines were placed at PT 1, just before the P-1 Sterlings Fluid System Peerless Pump PE50B1, and PT 10, just after WV5. A Fluke 179 multimeter was attached to the DP electrical box. The multimeter was set to read electrical signal in the form of…