Table 1

Data of study subjects

Subject no.SexAge (months)Weight (kg)Height (cm)EDS1-150(ml)Pj1-151 (cm H2O)
1M97.471.012831-152
2M2411.989.01293
3M55.863.51465
4F3113.793.110851-152
5F1310.576.513751-152
6M76.866.115791-152
7F10.58.972.01570
8M1713.088.0879
9F129.171.11270
  • EDS = effective dead space of the face mask; Pj = jacket pressure.

  • 1-150 EDS was measured in each infant with a water volumeter.10

  • 1-151 This Pj generated the highest forced vital capacity and was used when measuring the residual volume (RV) by nitrogenwashout.

  • 1-152 A Pj 10 cm H2O higher was used once when measuring RV and did not result in a lower RV.