Comparison of mouth-to-mouth, mouth-to-mask and mouth-to-face-shield ventilation by lay persons
| Autor: | John Ellerton, Elisabeth Gruber, Günther Sumann, Werner Beikircher, Florian Demetz, Hermann Brugger, Peter Paal, Markus Falk |
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| Rok vydání: | 2004 |
| Předmět: |
Face shield
Artificial ventilation Adult Male medicine.medical_specialty business.product_category Adolescent Mouth-to-mouth resuscitation medicine.medical_treatment Emergency Nursing law.invention Sex Factors law Intensive care medicine Humans Prospective Studies Students Volunteer Pocket mask business.industry Respiration Artificial Cardiopulmonary Resuscitation Anesthesia Ventilation (architecture) Emergency Medicine Physical therapy Female Cardiology and Cardiovascular Medicine business First aid |
| Zdroj: | Resuscitation. 70(1) |
| ISSN: | 0300-9572 |
| Popis: | A prospective randomised study on 70 volunteers without previous first aid education (42 males, 28 females, mean age 17) was performed to compare mouth-to-mouth ventilation (MMV, n = 24) versus mouth-to-pocket-mask ventilation (MPV, n = 25) and mouth-to-face-shield ventilation (MFV, n =21), and to evaluate if an instruction period of 10 min would be sufficient to teach lay persons artificial ventilation. Every volunteer performed three ventilation series using a bench model of an unprotected airway.MMV and MPV show higher mean tidal volume (TV) than MFV (values of series 3: 976 +/- 454 and 868 +/- 459 versus 604 +/- 328 ml, P = 0.002 and P = 0.025, respectively). We found a higher inter-individual variation in TV than in previous studies (P = 0.031). The recommended TV of 700-1000 ml was reached in only 23%, most frequently with MPV (MMV 16.7%, MPV 32%, MFV 19%) but the difference was not significant (P = 0.391). However, we found a significantly higher percentage with a TV below 700 ml with MFV (MMV 33.3%, MPV 36%, MFV 66.7% P = 0.047) and a significantly higher percentage of TV exceeding 1000 ml with MMV (MMV 50%, MPV 32%, MFV 14.3%) (P = 0.039). "Stomach" inflation was highest with MMV (79.2%) followed by MPV (52%) and MFV (42.9%) (P = 0.034). We found further differences between the sexes; males produced a higher TV (P = 0.003) and a higher percentage of stomach inflation (P = 0.029).MPV showed the best ventilation quality. It resulted in a more adequate TV than MMV and MFV and lower stomach inflation than MMV. Only a relatively low percentage of ventilations were within the recommended range for TV and this may be related to the short training duration. We found different performances between the sexes, a high inter-individual variation and mainly a low ventilation quality. Therefore, further studies have to focus more on teaching duration, sex differences and ventilation quality. |
| Databáze: | OpenAIRE |
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