The Study Of The Effect Of Chest Compression Method On Cardiopulmonary Resuscitation Quality

ObjectiveThe quality of cardiopulmonary resuscitation(CP R)is a very important prognostic factor for cardiac arrest.Chest compression is thought to be one of the most important aspects of high-quality CPR.Recent studies have prompted that there may be an interaction between chest compression rate and other factors related to the quality of chest compression.We aimed to investigate the effect of different compression rates on chest compression depth,recoil,and rescuers’ fatigue point during CPR.In addition,the 2010 guidelines recommend new requirements of the chest compression depth for infant.The compression technique recommendation for infant remains the 2-finger(TF)technique for lone rescuer and the 2-thumb-encircling hands technique for 2 rescuers.We hypothesized that the TF technique cannot result in an enough compression depth to meet the guideline requirements and that the 2-thumb-encircling hands technique will not affect the ventilation.MethodsParticipants performed cardiopulmonary resuscitation on a Laerdal Resusci manikin as requested in random sequence.The average chest compression in depth factors related to the quality of chest compression were recorded and analyzed.Results1.As the chest compression rate increases through all the 3 rates,the fractions of chest compressions with complete release and the percentages of correct hand position were deteriorated at the rate of 140 compressions/min and 100 compressions/min,respectively(p<0.05),although the average compression depth was above the recommended 2010 guideline depth of 5 cm(p>0.05).Of note,the fatigue point at 140 compressions/min happened significantly(p<0.05)sooner;2.Mean compression depths were(39.25 ± 3.06)cm in the TF technique and(42.37 ±1.15)cm in the 2-thumb-encircling hands technique,(p<0.001).Two-finger technique had significant lower fractions of correct hand position than 2-thumb-encircling hands technique[(96.56±6.74)%vs(99.41 ± 2.52)%],p<0.05.The fatigue point appears much earlier in TF th an in 2-thumb-encircling hands(p<0.05).No difference was identified on ventilation between 2 groups.Conclusion1.Our study supported the concern of some that there may be a risk of increasing recommended chest compression rate without providing an upper limit.An appropriate choice may be 120 compressions/min;2.The 2-thumb-encircling h ands technique can produce a compression depth meeting the current guidelines recommendation without negative influence on ventilation,whereas the TF technique cannot.The 2-thumb-encircling hands technique generates a significant higher ratio of correct compression position than the TF technique.Furthermore,the 2-thumb-encircling hands technique is less fatiguing than the TF technique.The 2-thumb-encircling hands technique should be recommended.