| [edit] Chest compression adjuncts
Several different devices have become available in order to help facilitate rescuers in getting the chest compressions completed correctly. These devices can be split in to three broad groups - timing devices, those that assist the rescuer to achieve the correct technique, especially depth and speed of compressions, and those which take over the process completely.
[edit] Timing devices
They can feature a metronome (an item carried by many ambulance crews) in order to assist the rescuer in getting the correct rate. The CPR trainer cited here has timed indicators for pressing on the chest, breathing and changing operators.
[edit] Manual assist devices
Studies have shown that audible and visual prompting can improve the quality of CPR and prevent the decrease of compression rate and depth that naturally occurs with fatigue,[55][56][57][58][59][60] and to address this potential improvement, a number of devices have been developed to help improve CPR technique.
These items can be devices to placed on top of the chest, with the rescuers hands going over the device, and a display or audio feedback giving information on depth, force or rate,[61] or in a wearable format such as a glove.[62] Several published evaluations show that these devices can improve the performance of chest compressions.[63][64]
As well as use during actual CPR on a cardiac arrest victim, which relies on the rescuer carrying the device with them, these devices can also be used as part of training programmes to improve basic skills in performing correct chest compressions..[65]
Certain defibrillation pads are capable of performing similar function, in that they may display rate and depth of compressions. Additionally, a certain algorithm may allow them to monitor electrical activity even during CPR.[66].
[edit] Automatic devices
There are also some devices available which take over the chest compressions for the rescuer. These devices use techniques such as pneumatics to drive a compressing pad on to the chest of the patient. One such device, known as the LUCAS, was developed at the University Hospital of Lund, is powered by the compressed air cylinders or lines available in ambulances or in hospitals, and has undergone numerous clinical trials, showing a marked improvement in coronary perfusion pressure[67] and return of spontaneous circulation.[68]
Another system called the AutoPulse is electrically powered and uses a large band around the patients chest which contracts in rhythm in order to deliver chest compressions. This is also backed by clinical studies showing increased successful return of spontaneous circulation.[69][70]
From Wikipedia, the free encyclopedia |
Article Details