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  • Open Access

Do athletes require a higher tidal volume? An approach using predicted versus measured PFTs

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Critical Care201115 (Suppl 1) :P199

https://doi.org/10.1186/cc9619

  • Published:

Keywords

  • Public Health
  • Body Weight
  • Mechanical Ventilation
  • Emergency Medicine
  • Tidal Volume

Introduction

Tidal volume (Vt) for ALI/ARDS is 6 ml/kg. However, professional athletes have higher forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV1) than predicted for the same body weight and thus a higher Vt could be required.

Methods

To answer this question, the predicted Vt (Vt Pr = 6 ml/kg) was calculated as the percentage of measured (Ms) and predicted (Pr) FEV1 and FVC, and their difference (Δδ = Ms - Pr) was extracted to calculate the additional Vt (VtA) required according to measured PFTs. Values are expressed as the mean (SEM).

Results

We included 156 males and 95 females of mean duration of sporting of 11.8 (6.4) and 11.6 (6.9) years, respectively. Ms and Pr FEV1 and FVC were recorded (data not shown). Vt Pr, the percentage to Ms and Pr FEV1 and FVC, their difference Δδ, the corresponding VtA and the new Vt (VtN) are presented in Table 1.
Table 1

Calculations to extract additional Vt according to predicted and measured PFTs

  

Vt to PFTs (%)

Vt to PFTs (%)

δ

VtA (ml)

VtN (ml)

 

Vt Pr (ml)

FEV1 Pr

FEV1 Ms

FEV1

FEV1

FEV1

Males

476.3 (6.1)

10.0 (016)

10.9 (0.13)

0.87 (0.1)

47.7 (5.1)

524 (8.1)

Females

384.9 (6.0)

10.4 (0.2)

11.1 (0.16)

0.67 (0.1)

29.9 (4.7)

414.8 (7.8)

 

Vt Pr (ml)

FVC Pr

FVC Ms

FVC

FVC

FVC

Males

476.3 (6.1)

8.35 (0.12)

9.1 (0.1)

0.75 (0.1)

51.3 (5.7)

527 (9.1)

Females

384.9 (6.0)

8.9 (0.17)

9.6 (0.14)

0.67 (0.1)

34.7 (5.5)

419 (8.6)

Conclusions

According to our hypothesis an additional Vt of 0.6 for males and 0.5 ml/kg for females maybe required for professional athletes under mechanical ventilation.

Declarations

Acknowledgements

Partially funded by OPAP.

Authors’ Affiliations

(1)
School of Nursing, Athens University, 'Agioi Anargyroi' Hospital, Kifissia, Greece

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