Reliability Testing – by Alexander Wassell 11-30-13
Executive Summary
Sudden cardiac arrest is a health problem, claiming over 450,000 lives every year in the US. Sudden cardiac arrest is reversible, but only if treated within minutes with the aid of an electrical cardioverter shock via an automated external defibrillator (AED) or with an AED defibrillator. (Sudden Cardian Arrest, n.d.). Sudden Cardiac Arrest (SCA) is an electrical problem caused by electrical malfunction of the heart that results in no blood flow to the body and brain usually caused by an abnormal heart rhythm called ventricular fibrillation (VF).The most effective way to treat Sudden Cardiac Arrest (SCA) is through defibrillation. Medtronic has been able to provide defibrillation through the invention of cardiac defibrillators. Their product is the Medtronic Physio Control LIFEPAK 15 Defibrillator/Monitor, delivers an electrical shock to the heart in order to restore a normal heartbeat within 10 minutes in order to survive an SCA event. If defibrillation does not occur within the window of 10 minutes, the rate of survival drops to less than 5%. LIFEPAK defibrillator's estimated lifecycle is between 3 to 7 years, depending on a number of variables. This wide range prompted Medtronic’s Cardiac Rhythm Disease Management (CRDM) department to request from the engineering department a life data analysis for the product line (times-to-failure). The request, “What is your best, relatively quick, estimate of the reliability of the system over a period of time relevant to the system?”
The desire to obtain reliability results rapidly than when the data comes from products operating under normal conditions via modeling the periods of the product life is a complicated probl...
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...(LASP) problem, which was covered in Chapter 6.
If the sample size required to distinguish between pa and pb turns out to be too large, it may be necessary to increase T or test at a higher stress. The important point is that the above assumptions and equations give a methodology for planning ongoing reliability tests under a Weibull model
Works Cited
Living with Your . (2011). Retrieved from Medtronic: http://www.medtronic.com/wcm/groups/mdtcom_sg/@mdt/@crdm/documents/documents/living-with-icd-english.pdf
Sudden Cardian Arrest. (n.d.). Retrieved from Medtronic: http://www.medtronic.com/for-healthcare-professionals/products-therapies/cardiac-rhythm/therapies/sudden-cardiac-arrest/
Technical Support Document - Distribution Models for Reliability Data. (n.d.). Retrieved from Minitab: http://www.minitab.com/support/documentation/Answers/Reliability_Distribution.pdf
The Zoll LifeVest (K0606-wearable cardioverter defibrillator) for the dates of 09/02/2015, 10/02/2015, 12/02/2015, 01/02/2016-02/02/2016 was not medically necessary for the treatment of this member’s condition.
In the case study “Is It Permissible to Shut Off this Pacemaker?” (Yates & Orr, 2008) there are dilemmas, facts and ethical principles that must be looked at in order to do a proper analytical analysis. The writer will discuss the persons/agents involved, the main dilemma, state the facts, ethical and moral principles that are relevant, as well as assess and try to resolve the dilemma.
First of all we need to understand the type of technology this device represents. Is this a sustaining innovation? Or is this a completely new disruptive product? After fully understanding this aspect we can make better decisions regarding the future of the firm and its product. This device offers many benefits that current products do not. As explained earlier, this device is extremely portable, offering emergency rooms the flexibility and convenience they seek to provide patients with the best treatment possible. Likewise, this product will come in at a price point much lower than current echocardiographies, further separ...
What I wanted to talk about today is this life save device called a automated external defibrillator. It has become the number one way to resuscitate a person who has had a cardiac arrest unwitnessed by emergency medical services and who is still in persistent ventricular fibrillation or ventricular tachycardia. Many people have played a big role in creating this device to become more efficient, smaller and easier to use for the general public. Here are just to name a few that played a part in the creation for this device: Claude Beck, James Rand, Paul Zoll, and Frank Pantridge. The first use of a defibrillator on a patient was in 1947 on a 14 year old boy. Claude Beck was performing a open-chest surgery when the boy went into fibrillation. Beck manually massaged his heart for 45 minutes until the arrival of the defibrillator. The defibrillator he used during surgery was made by James Rand and had silver paddles the size of large teaspoons. In 1956, Paul Zoll performed the first successful external defibrillation with a more powerful defibrillator. A major breakthrough in emergency medicine occur in 1965. At the time a majority of coronary deaths occurred outside of the hospital setting since defibrillator required a main power source and were only available in hospitals it made them pretty much useless in saving lives outside of a hospital setting. Frank Pantridge often referred to as the Father of Emergency Medicine, made the first portable defibrillator in 1965. This device was power by a car battery and weighted approximately 70 kg (155 lbs). By 1968 he was able to create a defibrillator that was safer to use and only weighted 3 kg (6-7 lbs). It was argued that their was a possibility of misuse of the device if given to a unt...
Approximately one million Americans suffer a heart attack annually. Four hundred thousand of these victims die as a result. Many of the heart attack deaths are due to ventricular fibrillation of the heart that occurs before the victim can reach any medical assistance or the emergency room. These electrical disturbances of the heart can be treated with medications once the patient reaches the hospital. Therefore, 90% to 95% of heart attack victims who make it to the hospital survive. The 5% to 10% who later die are those who have suffered major heart muscle damage.
That fleeting feeling in your chest; your heart skipping a beat, or even being breath taken; it could all be signs of being in love, or, in the medical field, it could be the signs of cardiac dysrhythmia (or arrhythmia). The human heart is like the electrical hub of the body. When any electrical hub is disturbed, a slight bump may cause the lights to flicker, or in the worst case, cause the lights to go out; permanently. The same can be said of the human heart. Irregularities in your heart, whether it is one that beats too fast (tachycardia) or one that beats too slow (bradycardia); may not all be life threatening conditions, but some can lead to cardiac arrest
4. "Failure Mode Effects Analysis (FMEA)." - ASQ. N.p., n.d. Web. 21 Apr. 2014. .
The primary concern for Mr. Miller would be preventing further ischemia and necrosis of the myocardial tissues, preventing serious complications such as cardiac dysrhythmias and heart failure, as well as relieving his chest pain that radiates to his left arm. Preventing further ischemia and necrosis of the myocardial tissue will help prevent the development of heart failure due to myocardial infarction, whereas relieving his pain will help reduce his episodes of shortness of breath, and will also help to reduce any anxiety and restlessness he may be having from being in pain and short of breath.
will deliver an electric shock to the heart to try to get it to stop the ventricular fibrillation which is when your heart rate increases and does not produce enough blood to the brian or other organs. A defibrillator was used in the case of Wes Leonard, but unfortunately it was not enough. As of right now I do not believe that there is a clear answer that would prevent the sudden cardiac arrests that athletes are suffering.
In the conclusion of this study, the authors review the results of the patients which showed different feelings about living with a pacemaker. These feelings ranged from fear and shock to spontaneous or habitual adaptation of the device. This study examined the
The narrator in “The Tell-Tale Heart” is not guilty because of reason of insanity. Although the narrator claimed that he was not mad, he acted like it. He even thought that the old man had an “Evil Eye” that was vexing him. He actually seemed proud, and sounded like he was very confident, acting as if he was better than “mad” people. He is insane.
With this newer technology Physicians, nurses, and other approved medical staff have the option to monitor their patient’s heart functionality, and fix pacemaker electrical signals to fit patients need from a mobile device, without ever bringing the patient into the Physicians’ office. Cardiac remote patient monitoring uses smart phones, and specific designed (secured) e-mails to deliver information sent from the device implanted within the patient’s heart. This allows medical staff to receive pertinent up-to date- information on the condition of the patient’s pacemaker, and heart. This can help create profound patient care, early critical heart failure, or heart defibrillation detection; while adding to medical staff’s proficiency, and cutting costly emergency room visits with prevention detection ("Remote Monitoring Technology Improves Pacemaker Performance", 2012).
Sudden cardiac death in young athletes was first reported in 1980s and defined as cardiovascular event that occurred during physical activity or within hours of physical activity without awareness of underlying cardiac abnormalities. (Subasic p.18) As the years have gone by, sudden cardiac deaths have occurred more frequently then in the 1980s. Scientists have been researching why exactly athletes suffer from cardiac arrest, and still most scientists haven’t found a clear and direct reason on why they occur. Although initially reported in the United States in the early 1980s, the causes of sudden death in ...
In the US, heart attacks kill more people than any other single cause. Many of the deaths are caused by electrical disturbances in a damaged heart that cause it to fibrillate (Pool). Despite current overwhelming interest in the operations of the human heart, for most of history the human heart has been regarded as a "forbidden organ too delicate to tamper with" (NOVA). In fact, it might have remained so, were it not for World War II where military doctors, faced with massive numbers of injuries ushered the world into our current medical trajectory.
The heart is the most important organ in the human body. The purpose of it is to pump oxygen and nutrient-rich blood to all parts of the body. It rarely occurs that the heart muscle become worn-out.. The threat to the heart’s normal function is in the diseases. (Landstinget i Värmland, 2008) In Sweden cardiovascular diseases are type of diseases which causes most deaths. 4 out of 10 people die in cardiovascular diseases and thousands die prematurely because of it. Today 12 percent of the Swedish population is suffering from cardiovascular diseases (Hjärt-Lungfonden, 2008) and today 40 000 of the Swedish population have a pacemaker. (CISIONWIRE, 2008) A treatment for a heart that is beating too slowly is receiving a pacemaker which keeps the heartbeat regular. (Hjärt-Lungfonden, 2008(2)