Portable Defibrillator


Portable Defibrillator 

In 85 percent of all sudden cardiac death is the beginning before a so-called ventricular fibrillation. Portable defibrillator A defibrillator can interrupt this rotating electric excitement in the heart by simultaneous stimulation of at least 70 percent of all cardiac muscle cells. In a large number of cells is depolarized simultaneously, which means that these cells have a relatively long time (about 250 ms = refractory period of cells) are no longer excitable. The circular wave is virtually portable defibrillator cut off the road and the heart is back in a state in which can take the natural conduction stimulation of the heart again. The decisive factor is the earliest date of use of defibrillation lead as the ventricular fibrillation caused by the deficiency of the brain with oxygen (Gehirnischämie) within a short time to massive neurological deficits can. For this reason, in the public space more and more automated external defibrillators (AED) places. The successful use of an portable defibrillator AED is the linchpin of the correct application of cardiopulmonary resuscitation. The AED is only a complement to, not replacement. However, add that a decrease in ventricular per minute, the survival of patients by 10%. Therefore, and should take place, the use of a lay defibrillator as soon as possible.

In principle, a defibrillator consists of a battery, a DC / DC converter, a capacitor, an output circuit and a control unit. Since the voltage of the battery for an electric shock is too small to be fitted with the aid of a DC / DC converter generates a higher voltage, the capacitor is charged to a previously set energy. By portable defibrillator pressing a button gives the capacitor's stored energy, about 200 to 360 joules, from the patient. The voltage is 750 volts and is located at 1 to 20 milliseconds. The current is reached at an assumed average body resistance is 50 ohms up to about 15 amperes.The necessary is capacitor has a capacity of about 1,000 nF. 

This energy is delivered through large electrodes, which are either pressed with the hands on the chest of the patient (the so-called "paddles") or be glued to the chest ("adhesive electrodes" or "fast patch"). Especially for publicly accessible defibrillators ("PAD" public access defibrillator) are - in order to simplify operation and reduce the risk of electric shock to the user - virtually only used adhesive electrodes. 
For use with open chest (during surgery), there are versions with spoon electrodes which are applied directly to the heart muscle. 
The output circuit provides for the generation of certain pulse shapes. The control unit regulates the charging of the capacitor, and directs the output circuit also ensures that is discharged in the absence of shock delivery, the capacitor has an internal resistance (protection circuit). 

Modern biphasic defibrillators work. This means that is emitted from the output stage is not only a shock, but that will be delivered by voltage transitions at the paddles and shocks in the opposite direction. Modern biphasic defibrillators measure before the release of energy the body resistance (impedance) of the patient by means of electrodes portable defibrillator glued and adjust current and voltage is applied to this resistance. Slim, small patients with low impedance receive less power than, for example, obese, large patients. In international guidelines for defibrillation is now specified that biphasic defibrillators are to deliver an equal height or higher energy than monophasic devices. There is now also an evidence that escalating energy levels are more effective than the same energy taxes to the patient.

Pro-tooth defibrillator initiative for patients patients
The pro-tooth-Initiative portable defibrillator eV, in contrast to many other organizations in the dental field is no association of dentists, their families, or holders of dental company, but a group of independent patients. The aim of the defibrillator association is to take on health policy on the subject of dental care and influence to represent the interests of patients. The PZI stands for solidarity and mobilization of public opinion on the subject of Conservative Dentistry portable and makes up for the preservation of the legal services to the dental supply strong.

Information sessions, portable personal counseling and seminars
In addition to current benefits plans to Pro-tooth Initiative consultations for patients as well as seminars on the subject teeth, dentures, dental prophylaxis defibrillator and dental fear. Members of the PZI will test and evaluate products of the dental market from the perspective of the patient, such as the quality of service and staff friendliness. Always Mondays from 14 bis neun clock the partners of the Pro-tooth initiative are in store in the neighborhood portable defibrillator Tauroggenerstraße 44, 10589 Berlin for questions about the dental health are available. There are also held information sessions. Anyone interested can become members of the PZI. portable Membership only costs five euros a year.