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ernd59
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If defibrillation is not required is there an alternative method to save the enrgy for the next needed defibrillation rather than to discharge the capacitor using a resistor ?
it takes some time to charge the high voltage capacitor, and in a defibrillation every second counts. Normally while the EKG is working the capacitor is charging, I've never seen an aborted defibrillation too but theoretically it is possibleberkeman said:And the defibrillator is only charged up if the EKG shows a shockable rhythm. I've never seen an aborted defibrillation -- have you?
ernd59 said:it takes some time to charge the high voltage capacitor, and in a defibrillation every second counts. Normally while the EKG is working the capacitor is charging, I've never seen an aborted defibrillation too but theoretically it is possible
i'm a student working on bachelor thesis, the Professor told me or what i think he told me, that in some AED "Automated external defibrillator" the charging of the capacitor and the EKG reading are done in the same time to minimise waiting period and assure the effectiveness of the defibrillationberkeman said:Not where I work. You always read the EKG to see if it is shockable rhythm, then it if is, you push the charging button. Where do you work where the defibrillator is charged before reading the EKG?
yes, that's what i meant :)mfb said:I guess the charge is discarded if the patient gets a pulse before getting shocked.
ernd59 said:i'm a student working on bachelor thesis, the Professor told me or what i think he told me, that in some AED "Automated external defibrillator" the charging of the capacitor and the EKG reading are done in the same time to minimise waiting period and assure the effectiveness of the defibrillation
berkeman said:I am not aware of any AEDs that do that. Can you find out a specific brand and model?
I suppose you could propose that it could be a new feature, if you could return the energy to the battery if no defibrillation was needed. On the other hand, it is pretty dangerous to be charging the defibrillation capacitor if you aren't going to use it. All it takes is one slip near the controls to discharge the capacitor into the patient and whoever else is in contact with them. I'm not sure you could get safety approvals for such a "feature". My AED charges in just 2-3 seconds, and that amount of time is not going to make a big difference in mortality or morbidity...
look at this Patent of a Portable defibrillators, they had a different goal but the idea is the same https://www.google.com.ar/patents/US7236823berkeman said:I am not aware of any AEDs that do that. Can you find out a specific brand and model?
I suppose you could propose that it could be a new feature, if you could return the energy to the battery if no defibrillation was needed. On the other hand, it is pretty dangerous to be charging the defibrillation capacitor if you aren't going to use it. All it takes is one slip near the controls to discharge the capacitor into the patient and whoever else is in contact with them. I'm not sure you could get safety approvals for such a "feature". My AED charges in just 2-3 seconds, and that amount of time is not going to make a big difference in mortality or morbidity...
ZOLL AEDPlus:
http://www.dremed.com/catalog/images/zoll_aed_plus2_lg.jpg
ernd59 said:look at this Patent of a Portable defibrillators, they had a different goal but the idea is the same https://www.google.com.ar/patents/US7236823
256bits said:So how does this work.
You check the patient - possible cardiac arrest or similar and irregular rhythm determined.
Defibrillation is chosen
Patient zapped
EKG tested - turns out OK
Defribulator turned to zero position
Paddles returned to their holding location on machine
OK thanks. Seen them in action but only in the movies, where they always do say "Clear", so I was wondering about the actual protocol.berkeman said:Each shock is separately charged. When you see the shockable rhythm, you push the charge button and wait a couple seconds for the light to come on. Then you call "everybody clear" (very important step! ), and press the discharge button. I don't know what happens if you don't press the discharge button. But I wouldn't want to be working on a patient while the HV was still charged up...
can we consider not pressing the discharge button as self-tests?berkeman said:Each shock is separately charged. When you see the shockable rhythm, you push the charge button and wait a couple seconds for the light to come on. Then you call "everybody clear" (very important step! ), and press the discharge button. I don't know what happens if you don't press the discharge button. But I wouldn't want to be working on a patient while the HV was still charged up...
ernd59 said:can we consider not pressing the discharge button as self-tests?
A high voltage capacitor defibrillator is a medical device used to deliver an electrical shock to a person's heart in order to restore a normal heart rhythm. It uses a high voltage capacitor to store and release a large amount of electrical energy.
The defibrillator delivers a controlled electric shock through the chest to the heart. This shock depolarizes the heart muscle, allowing the natural pacemaker of the heart to resume control and restore a normal heart rhythm.
High voltage capacitor defibrillators are typically used by trained medical professionals, such as doctors, nurses, and paramedics. They require specialized training and certification to operate.
While a high voltage capacitor defibrillator can be life-saving in certain situations, there are potential risks involved. These include burns, injuries to the heart or other organs, and interference with other medical devices.
To ensure safe use of a high voltage capacitor defibrillator, it is important to follow proper safety precautions. This includes making sure the device is charged and functioning properly, ensuring proper placement of the electrodes, and using appropriate protective gear, such as gloves and goggles.