Defibrillator prakash
- 1. PRESENTED BY:- PRAKASH RATHORE DEFIBRILLATORS
- 2. OBJECTIVES 1. Defibrillation 2. Need of defibrillation 3. Types of defibrillator 4. Automated external defibrillator (AED) 5. Precautions and risk 6. Troubleshooting of defibrillator
- 3. DEFINITION Defibrillation is a process in which an electronic device sends an electric shock to the heart to stop an extremely rapid, irregular heartbeat, and restore the normal heart rhythm. Defibrillation is a common treatment for life threatening cardiac dysrhythmias – 1. ventricular fibrillation(VF) 2. pulseless ventricular tachycardia (pVT).
- 4. NEED FOR A DEFIBRILATOR. VF/pVT - asynchronous rapid ineffective contraction of the heart. Early defibrillation – high chance of rhythm to revert back to normal.
- 5. Normal ECG
- 9. DEFIBRILLATION WAVEFORMS AND ENERGY LEVELS The energy settings are designed to provide the lowest effective energy needed to terminate VF Shock success -Termination of VF at 5 seconds after the shock VF frequently recurs after successful shocks, but this recurrence should not be equated with shock failure
- 10. Based on energy delivery, defibrillators are classified as:- Monophasic Biphasic Energy levels vary by type of device Monophasic – (360 J) Biphasic – (120 – 200J) In pediatrics – Use of pediatric paddle – Doses are 2 – 4 J/kg upto a maximum of 10J/kg with subsequent shocks.
- 11. Synchronized Cardioversion Tachyarrhythmias with pulse, but an unstable patient. Energy selection is from 50 – 200 J. ECG leads must be attached to the defibrillator, paddles/pads attached and ‘sync’ button pressed. Following synchronization, the device is charged and shock delivered. Patients usually require sedation/analgesics.
- 13. Transcutaneous Pacing Cardiac pacing can be done using the same device using the pads. Needed in bradyarrhythmias. Select ‘Pacer’ mode and select the required current and heart rate.
- 14. TYPES OF DIFIBRILATOR Internal external
- 15. TYPES OF DIFIBRILATOR…….. a) Internal defibrillator (Implantable cardiac defibrillator) • Electrodes placed directly into the heart • Have both defibrillation and pacing functions b) External defibrillator 1.Automated 2.Semi automated
- 17. DEFIBRILLATOR ELECTRODES Types of Defibrillator electrodes:- A) Spoon shaped electrode • Applied directly to the heart. B) Paddle type electrode • Applied against the chest wall C) Pad type electrode • Applied directly on chest wall
- 24. Automated external Defibrillators AEDs are sophisticated, reliable devices Use voice and visual prompts to guide lay rescuers and healthcare providers to safely defibrillate VF SCA
- 25. AED SYMBOLE IN HEAVY CROWD PLACE
- 26. WORKING OF AED Turned on or opened AED. AED will instruct the user to:- • Connect the electrodes (pads) to the patient. • Avoid touching the patient to avoid false readings by the unit. • The AED analyses rhythm and determines if shockable or not.
- 27. When device determined that shock is warranted, it will charge its internal capacitor in preparation to deliver the shock. When charged, the device instructs the user to ensure no one is touching the victim and then to press a red button to deliver the shock. They come with a pediatric dose attenuator for children < 8 years.
- 28. PRECAUTION The paddles used in the procedure: Should not be placed on a breasts Over an internal pacemaker generator. Over wet/hairy skin Before the paddle is used, a conducting jelly must be applied and spread over the electrode surface.
- 29. RISK IN DEFIBRILATOR Skin burns from the defibrillator paddles are the most common complication of defibrillation. Other risks include injury to the heart muscle, abnormal heart rhythms, and dislodgement of blood
- 30. TROUBLESHOOTING Attach the external and internal paddles if the monitor reads, "No paddles." • Check to ensure that the leads are securely attached if the monitor reads, "No leads.“ • Connect the unit to AC power if the message reads, "Low battery." • Verify that the Energy Select control settings are correct if the defibrillator does not charge.
- 31. Thank you…