Volume 11 Supplement 2

27th International Symposium on Intensive Care and Emergency Medicine

Open Access

The Gliding-SLICE method: an enhanced tool for estimation of intratidal respiratory mechanics

  • S Schumann1,
  • C Stahl1,
  • D Steinmann1,
  • K Möller2 and
  • J Guttmann1
Critical Care200711(Suppl 2):P204

https://doi.org/10.1186/cc5364

Published: 22 March 2007

Introduction

Focusing on lung-protective ventilation, the analysis of nonlinear dynamic respiratory mechanics appears crucial. Based on the SLICE method we developed the Gliding-SLICE method as a tool to determine respiratory system mechanics. This tool was tested in a nonlinear water-filled two-chamber lung model.

Methods

The classic SLICE method [1] determines parameters of the respiratory system for abutted volume ranges. The Gliding-SLICE method enhances this method by moving a window of analysis along the volume axis. This way, a quasi-continual course of intratidal mechanics can be determined. To test the new method we build up a physical model that consists of two connected chambers filled with water. During inspiration water is displaced from one chamber to the other resulting in a counter pressure. Using wedges of certain shapes we simulated volume-dependent nonlinear compliances.

Results

Using the Gliding-SLICE method we determined a nonlinear course of compliance in a patient (Figure 1) and in model data (Figure 2).
Figure 1

abstract P204

Figure 2

abstract P204

Conclusion

The Gliding-SLICE method allows one to calculate mechanical parameters of the respiratory system quasi-continually. This allows a more intuitive interpretation of data. The method is not limited to principle constrictions but can be enhanced by ventilatory maneuvers; for example, for separated view on inspiratory and expiratory respiratory mechanics.

Authors’ Affiliations

(1)
University Hospital
(2)
HFU

References

  1. Guttmann , et al.: Technol Health Care. 1994, 2: 175-191.PubMedGoogle Scholar

Copyright

© BioMed Central Ltd. 2007

Advertisement