ABSTRACT

The spirometry (PFT) and the arterial gasometry (AG) are the most common used exams to avaluate the pulmonar function. The purpose of this study is to determine whether an abnomality in the expiratory flows determined by PFT produces disfunctions of the gas exchange in the studied population. A study was designed observational, transversal, comparative, retrospective, from may 1998 until January 1999, whit 50 patients without distinction of age or sex. whith suspicion of pulmonar disease, to whom PFT and AG were permormed (considered as variable), by the Respiratory Fisiology Department of the Hospital Universilario de Puebla (HUP). The measured parameters in the PFT were: Forced vital capacity (FVC), forced expiratory volume (FEV-1), mesoespiratory flow (MF); were considered: a) normal parameters, > 80% of the predicted; b) slight, between 60- 79%; c) moderate, between 40-59%; and d) severe, < 39%. In AG, the measured parameters were: arterial-alveoli difference of oxygen (aADO2) and tisular oxlgenation index (TOI) calculated whit the formula PaO/FiO2; the study considered: a) normal, with aADO2 > or = 20 mmHg, TOI > or = 300 mmHg; b) slight, with aADO2= 21-100 mmHg, and TOI = 200-299 mmHg; c) moderate, with aADO2= 101-200 mmHg, and TOI = 100-199 mmHg; d) severe, with aAOO, > 201 mmHg, and TOI < 99mmHg. Four groups of PFT and AG were established with following categories: Normal, slight, moderate, severe. Both studies were compare for each patient amd statistic indicated treatment between the variables and their respective categories was applied to them, establishing az’ = 21.24 with p < 0.01. The present study establishes that the disturb of the PFT variable inflicts an alteration of the AG variable.

KEYWORDS

espirometry, gasometry, alteration.

REFERENCES

1. Ayala R, y col. I concenso brasileiro sobre espirometría.Journal Pneumologia 1996.

2. Boushey HA, Sheppard MD. Respiratory medicine. Murray,1994, Ed. Pais, 51-52,798-900.

3. Rico MG, Gómez CF, Meneses GL. Valores gasométricos enpoblación geriátrica. Análisis en dos diferentes alturas.1998;11:25-28.

4. Wilson JD, Braunwald E. Principios de medicina interna. 12aMéxico: Interamericana, 1992;2:1196-1203.

5. Hinshaw HC, Murray JF. Enfermedades del tórax. México: Ed.Interamericana, 1994:63-107.

6. Pérez NJ. Fisiología de la respiración. INER-ISSSTE. México.1998:4-47.

7. Jones NU Jones NJ, Edwards RH. Exercise tolerance inchronic airway obstruction. An Respiratory Dis 1971;103:477-91.

8. Simoes AC, Silva. Gasometría: Interpretacao e quando intervenir.Journal Pneumologia 1996;12:30-36.

9. Villegas JF, Elisalde GJ, Martínez SJ. Monitoreo respiratoriono invasivo. Neum Cir Tórax 1991;50:19-41.

10. Shapiro B, Harrison R. Manejo clínico de los gases sanguíneos.Ed. País. 1996:28-48, 267-278, 279-287.

11. Siggaard AM, Siggaard AO. Manual de gases en sangre.Radiometer Medical A/S Dinamarca DK-2700 Bronsoj. 1998:1 -60.

12. Emerman CL, Connors AF, Lukens TW. Relationship betweenarterial blood gases and spirometry un acute exacerbations ofchronic obstructive pulmonary disease. Ann Emerg Med1989;18(5):523-7.

13. Ansen JE. Arterial blood gases. Clin Med 1989;10(2):227-37.

14. Preusser BA, Lash J, Stone KS. Quantifying the minimumdiscard sample required for accurate arterial blood gases.Nurs Res 1989;38(5):276-9.

15. Siggaard AM, Siggaard AO. The oxigen status algorithm: Acomputer program. Radiometer A/S. Copenhagen N.V.Denmark. 1991:1-5

16. Siggaard AM, Siggaard AO. Arterial oxigen status determinedwhit routine pH/blood gas equipment and multi-wagelengthhemoximelry: Referency values, precision and accuracy. ScandJ Clin Lab lnvest.1990;50(suppl):203:50-66.

17. Siggaard AM, Siggaard AO. The oxigen status algorithm: Acomputer program for calculating and displaying pH and bloodgas data. Scan J Clin Lab Invest 1990;50(suppl):203:29-45.

18. Overton DT, Bocka JJ. The alveolar arterial oxigen gradient inpatients whit documented pulmonary embolism. Arch InternMed 1998;146(7):1617-9.