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Errors in measurement of functional residual air and the evenness of pulmonary ventilation during work in a closed system

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Conclusions

1. The error associated with determination of the volume of residual air by the closed system method with a helium gas analyzer of rating 2.5 does not exceed ± 21%.

2. The closed system method with instrument POOL-1 can be used for single determinations of the volume of residual air with a 0.95 probability of errors not exceeding 15%.

3. The error associated with determination of the index of effective displacement in a closed system with a helium gas analyzer of rating 2.5 does not exceed 35.5%.

4. Single determinations of the index of effective displacement with a 90% probability of errors not exceeding 25% can be made with the POOL-1 instrument in the closed system method.

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Literature cited

  1. 1.

    R. I. Agranovich, Novisti Med. Tekhniki, No. 3, 120 (1965).

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Additional information

All-Union Research Institute of Medical Instrument Construction, Moscow. Translated from Meditsinskaya Tekhnika, Vol. 2, No. 2, pp. 17–21, March–April, 1967.

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Cherkasova, A.A. Errors in measurement of functional residual air and the evenness of pulmonary ventilation during work in a closed system. Biomed Eng 2, 78–81 (1968). https://doi.org/10.1007/BF00560166

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Keywords

  • Helium
  • Closed System
  • System Method
  • Pulmonary Ventilation
  • Single Determination