IMPACT OF MECHANICAL CHEST COMPRESSION IN OUT OF HOSPITAL CARDIAC ARREST(OHCA): A CROSS-SECTIONAL STUDY
Background: Out-of-hospital cardiac arrest (OHCA) is one of the major global healthcare problems with a relatively high failure rate, and with a chance of Return Of Spontaneous Circulation(ROSC) of about 17% (4,8)
Recently, automatic mechanical chest compression devices(meCC) have been made which guarantee excellent quality of compressions: massage depth (5-6 cm), complete release after each compression, constant and correct frequency (100-120 compressions / minute). These devices are battery operated, automatic and guarantee an optimal CPR quality. (6,9)
Methods: The study is prospective, cohort, and was carried out with a 2-year data collection, from 2019 to 2021.
In this study all people are included also pediatric and traumatic patients, affected by OHCA with a CPR performed.
Data collection is performed by a questionnaire completed by the EMS team at the end of the intervention.
Results: In two years, 76 cases of OHCA were collected. ROSC was 9, 11,8%. With regard to the primary evaluated outcomes 44 patients were treactes with a mechanical chest compression system, while 32 patients treated with manual chest compression. ROSC in the group of patients treated with a mechanical chest compression system were 7, with an incidence of 15,9. Patients affected by OHCA, treated with manual CPR, ROSC are 2, equal to 6,3%.
Despite a substantial difference in the incidence of ROSC between the two groups, there is no statistical significance (p> 0.05) regarding the association between the use of MCA and ROSC.
Conclusion: This prospective, cohort study, despite the small number of selected patients, and the observational nature, shows how ROSC in patients affected by OHCA do not increase significantly in case of a systematic use of mechanical chest compression system. Other studies will be needed to understand the impact of mechanical chest compression system in OHCA
Keywords: Prehospital setting, Out of hospital cardiac arrest, Mechanical chest compression, Bystander CPR, ROSC
Fabio Negrello, Cardiology Unit, Cardio-Thoracic-Vascular Department, IRCCS University Hospital of Bologna, Bologna, Italy.