50% duty cycle may be inappropriate to achieve a sufficient chest compression depth when cardiopulmonary resuscitation is performed by female or light rescuers
Objective Current guidelines for cardiopulmonary resuscitation recommend chest compressions (CC) during 50% of the duty cycle (DC) in part because of the ease with which individuals may learn to achieve it with practice. However, no consideration has been given to a possible interaction between DC a...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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The Korean Society of Emergency Medicine
2015-03-01
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| Series: | Clinical and Experimental Emergency Medicine |
| Subjects: | |
| Online Access: | http://www.ceemjournal.org/upload/pdf/ceem-14-046.pdf |
| _version_ | 1797897205360623616 |
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| author | Chang Jae Lee Tae Nyoung Chung Jinkun Bae Eui Chung Kim Sung Wook Choi Ok Jun Kim |
| author_facet | Chang Jae Lee Tae Nyoung Chung Jinkun Bae Eui Chung Kim Sung Wook Choi Ok Jun Kim |
| author_sort | Chang Jae Lee |
| collection | DOAJ |
| description | Objective Current guidelines for cardiopulmonary resuscitation recommend chest compressions (CC) during 50% of the duty cycle (DC) in part because of the ease with which individuals may learn to achieve it with practice. However, no consideration has been given to a possible interaction between DC and depth of CC, which has been the subject of recent study. Our aim was to determine if 50% DC is inappropriate to achieve sufficient chest compression depth for female and light rescuers. Methods Previously collected CC data, performed by senior medical students guided by metronome sounds with various down-stroke patterns and rates, were included in the analysis. Multiple linear regression analysis was performed to determine the association between average compression depth (ACD) with average compression rate (ACR), DC, and physical characteristics of the performers. Expected ACD was calculated for various settings. Results DC, ACR, body weight, male sex, and self-assessed physical strength were significantly associated with ACD in multivariate analysis. Based on our calculations, with 50% of DC, only men with ACR of 140/min or faster or body weight over 74 kg with ACR of 120/min can achieve sufficient ACD. Conclusion A shorter DC is independently correlated with deeper CC during simulated cardiopulmonary resuscitation. The optimal DC recommended in current guidelines may be inappropriate for achieving sufficient CD, especially for female or lighter-weight rescuers. |
| first_indexed | 2024-04-10T07:54:56Z |
| format | Article |
| id | doaj.art-11e1b15df89d459a8e057baaaa8781b2 |
| institution | Directory Open Access Journal |
| issn | 2383-4625 |
| language | English |
| last_indexed | 2024-04-10T07:54:56Z |
| publishDate | 2015-03-01 |
| publisher | The Korean Society of Emergency Medicine |
| record_format | Article |
| series | Clinical and Experimental Emergency Medicine |
| spelling | doaj.art-11e1b15df89d459a8e057baaaa8781b22023-02-23T05:26:47ZengThe Korean Society of Emergency MedicineClinical and Experimental Emergency Medicine2383-46252015-03-012191510.15441/ceem.14.0462650% duty cycle may be inappropriate to achieve a sufficient chest compression depth when cardiopulmonary resuscitation is performed by female or light rescuersChang Jae Lee0Tae Nyoung Chung1Jinkun Bae2Eui Chung Kim3Sung Wook Choi4Ok Jun Kim5 Department of Emergency Medicine, CHA University School of Medicine, Seongnam, Korea Department of Emergency Medicine, CHA University School of Medicine, Seongnam, Korea Department of Emergency Medicine, CHA University School of Medicine, Seongnam, Korea Department of Emergency Medicine, CHA University School of Medicine, Seongnam, Korea Department of Emergency Medicine, CHA University School of Medicine, Seongnam, Korea Department of Emergency Medicine, CHA University School of Medicine, Seongnam, KoreaObjective Current guidelines for cardiopulmonary resuscitation recommend chest compressions (CC) during 50% of the duty cycle (DC) in part because of the ease with which individuals may learn to achieve it with practice. However, no consideration has been given to a possible interaction between DC and depth of CC, which has been the subject of recent study. Our aim was to determine if 50% DC is inappropriate to achieve sufficient chest compression depth for female and light rescuers. Methods Previously collected CC data, performed by senior medical students guided by metronome sounds with various down-stroke patterns and rates, were included in the analysis. Multiple linear regression analysis was performed to determine the association between average compression depth (ACD) with average compression rate (ACR), DC, and physical characteristics of the performers. Expected ACD was calculated for various settings. Results DC, ACR, body weight, male sex, and self-assessed physical strength were significantly associated with ACD in multivariate analysis. Based on our calculations, with 50% of DC, only men with ACR of 140/min or faster or body weight over 74 kg with ACR of 120/min can achieve sufficient ACD. Conclusion A shorter DC is independently correlated with deeper CC during simulated cardiopulmonary resuscitation. The optimal DC recommended in current guidelines may be inappropriate for achieving sufficient CD, especially for female or lighter-weight rescuers.http://www.ceemjournal.org/upload/pdf/ceem-14-046.pdfcardiopulmonary resuscitationclinical competenceeducationprognosisheart arrest |
| spellingShingle | Chang Jae Lee Tae Nyoung Chung Jinkun Bae Eui Chung Kim Sung Wook Choi Ok Jun Kim 50% duty cycle may be inappropriate to achieve a sufficient chest compression depth when cardiopulmonary resuscitation is performed by female or light rescuers Clinical and Experimental Emergency Medicine cardiopulmonary resuscitation clinical competence education prognosis heart arrest |
| title | 50% duty cycle may be inappropriate to achieve a sufficient chest compression depth when cardiopulmonary resuscitation is performed by female or light rescuers |
| title_full | 50% duty cycle may be inappropriate to achieve a sufficient chest compression depth when cardiopulmonary resuscitation is performed by female or light rescuers |
| title_fullStr | 50% duty cycle may be inappropriate to achieve a sufficient chest compression depth when cardiopulmonary resuscitation is performed by female or light rescuers |
| title_full_unstemmed | 50% duty cycle may be inappropriate to achieve a sufficient chest compression depth when cardiopulmonary resuscitation is performed by female or light rescuers |
| title_short | 50% duty cycle may be inappropriate to achieve a sufficient chest compression depth when cardiopulmonary resuscitation is performed by female or light rescuers |
| title_sort | 50 duty cycle may be inappropriate to achieve a sufficient chest compression depth when cardiopulmonary resuscitation is performed by female or light rescuers |
| topic | cardiopulmonary resuscitation clinical competence education prognosis heart arrest |
| url | http://www.ceemjournal.org/upload/pdf/ceem-14-046.pdf |
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