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Timespan of the defibrillator
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Closed chest defibrillator was developed.
William B. Kouwenhoven, an American electrical engineer at Johns Hopkins University, developed a closed-chest defibrillator that sent alternating current (AC) electrical shocks to the heart through electrodes placed on a dog's chest. "Defibrillation." Wikipedia. Wikimedia Foundation, 18 Sept. 2012. Web. 01 Oct. 2012. http://en.wikipedia.org/wiki/Defibrillation. -
Defibrillator first used on a Person
Claude Beck, Professor at Case Western Reserve University, successfully resuscitated a human patient. A 14 year old boy who was being operated was surgically opened, and manual cardiac massage for 45 minutes until the arrival of the defibrillator. Beck used internal paddles on either side of the heart and achieved return of normal sinus rhythm. "Defibrillation." Wikipedia. Wikimedia Foundation, 18 Sept. 2012. Web. 01 Oct. 2012. http://en.wikipedia.org/wiki/Defibrillation. -
Defibrillator first used on a Person extended
Walker, James. "Defibrillators:." Defibrillators:. Pearson Education, Inc. New Jersey, 2004. Web. 01 Oct. 2012. http://www.unc.edu/~goettsch/. -
Direct Current moves into Defibrillator
Bernard Lown research alternative technique which involved charging capacitors to 1000 volts with an energy content of 100-200 joules then delivering the charge through sinusoidal wave of finite duration (~5 milliseconds) to the heart by way of paddle electrodes.
"Defibrillation." Wikipedia. Wikimedia Foundation, 10 Mar. 2012. Web. 04 Oct. 2012. http://en.wikipedia.org/wiki/Defibrillation. -
Portable defibrillators are invented
Prof. Frank Pantridge in Belfast invented the first portable defibrillator. Portable defibrillators are among the most important tools carried by ambulances. The popularity of the portable defibrillator increased during the 1980s and was widely used in ambulances and emergency rooms.
"Defibrillation." Wikipedia. Wikimedia Foundation, 10 Mar. 2012. Web. 04 Oct. 2012. http://en.wikipedia.org/wiki/Defibrillation. -
Portable defibrillators are invented
Johnson, Steve. "Advancements in Doctor's Offices & Emergency Rooms in the Past 25 Years." EHow. Demand Media, 23 Nov. 2010. Web. 04 Oct. 2012. http://www.ehow.com/list_7551709_advancements-rooms-past-25-years.html. -
Diphasic defibrillation are invented
A diphasic defibrillation is a type of defibrillation waveform where a shock is delivered to the heart via two vectors. Biphasic defibrillation alternates the direction of the pulses, completing one cycle in approximately 10 milliseconds. They decrease the energy level necessary for successful defibrillation, decreasing the risk of burns and myocardial damage. -
Diphasic Defibrillation is invented
"Defibrillation." Wikipedia. Wikimedia Foundation, 10 Mar. 2012. Web. 04 Oct. 2012. http://en.wikipedia.org/wiki/Defibrillation."UNDERSTANDING DEFIBRILLATION WAVEFORMS." Defibrillation Waveforms. Ournal of American College of Cardiology, 2010. Web. 04 Oct. 2012. http://www.resuscitationcentral.com/defibrillation/biphasic-waveform/. -
AED defirillators are invented
AED defibrillators are devices that evaluate the heart rhythm of a person in cardiac arrest and determine through electrode pads if the rhythm is abnormal and whether the heart can be “shocked” back to normal. AEDs are considered a critical line of defense because they give people a greater chance of survival without permanent brain damage. -
AED defibrillators are invented extended
“ Defibrillation." Wikipedia. Wikimedia Foundation, 10 Mar. 2012. Web. 04 Oct. 2012. http://en.wikipedia.org/wiki/Defibrillation.Rospond, Kathryn M. "AEDs." - Facilities Management Emergency Preparedness Feature. Emergency Preparedness, Dec. 2002. Web. 04 Oct. 2012. http://www.facilitiesnet.com/emergencypreparedness/article/AEDs--1492.
