A research report submitted in partial fulfilment of the requirements for the degree of
Master in Science in Physiotherapy in the Faculty of Medicine of the University of the
Witwatersrand, Johannesburg.
Johannesburg, 1994 / The manual resuscitation bag is a modality which is commonly used by physiotherapists
to manually hyperinflate the lungs of mechanically ventilated patients. There is limited
scientific evidence to support its use and the literature is not in agreement as to the effects
of manual hyperinflation. A meta-analysis of the current research has been conducted to
investigate the effects of this modality on arterial oxygen tension and lung compliance.
All studies evaluating the effects of manual hyperinflation (or bagging) on arterial oxygen
tensions andlor lung compliance on mechanically ventilated patients have been retrieved.
Only studies which reported results in terms of mean values and standard deviation or
standard error of the mean could be used in this analysis. Twelve studies were identified
between the time period 1968 - 1994. Seven of these studies fitted the inclusion criteria.
The mean and standard error (If the mean values for arterial oxygen tensions (Pa02) and
lung compliance (Ci) have been used to calculate the 95% confidence intervals and these
results were plotted on a graph. A comparative analysis has been performed un the results
of the seven studies. A generally non-significant association between bagging and the
Pa02 and Ci values was demonstrated. Great discrepancies were identified in the designs
of the seven studies.Since the seven studies included ill this meta-analysis show an overall
non-significant association, it is reasonable to assume that the manual resuscitation bag
has limited capacity for increasing the Pa02 and Ci values. It is unfortunate that in the
studies where a positive outcome of bagging was demonstrated. inadequate data was
presented in the trials. Therefore, these studies could not be included in this meta-analysis.
The studies which have been included, however, presented such divergent designs that
they do not offer conclusive evidence. Recommendations are presented for a standardised,
multicentre study which hopefully will clarify the therapeutic value of this elusive modality
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/20593 |
| Date | 14 July 2016 |
| Creators | Barker, Michael |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | application/pdf |
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