Hepatitis B Virus (HBV)

Category: Airway Obstruction

Comparison of PEFR and FEV1 in Patients with Varying Degrees of Airway Obstruction: Conclusion

One possible explanation for the higher peak flow values observed in our patient population is the altitude where testing was performed (approximately 1,606 m). Recently, Lenggenhager reported that resistance to airflow was reduced as barometric pressure decreased. Our results with normal subjects in an atmospheric chamber support this finding clinically. Subjects were able to generate […]

Comparison of PEFR and FEV1 in Patients with Varying Degrees of Airway Obstruction: Discussion

For example, of 18 patients with JPF values in the range of 80 to 89 percent predicted, 11 had FEV, values of less than 70 percent predicted. The same results were observed when peak flow obtained with the WPF was used for comparison. fully We further sought to assess the effect of altitude on values […]

Comparison of PEFR and FEV1 in Patients with Varying Degrees of Airway Obstruction: Results

Ten subjects with airway obstruction demonstrated little or no reversible component and had diagnoses of COPD. The mean baseline FEVi for all patients with obstructive lung disease was 1.83 ±0.75 L (60.9 percent predicted) while the mean JPF was 314 ± 122 L/min (76.9 percent predicted). Airway symptoms had been present in this group from […]

Comparison of PEFR and FEV1 in Patients with Varying Degrees of Airway Obstruction: Materials and Methods

All testing was performed at an altitude of approximately 1,606 m. Each patient performed three maneuvers with each instrument in an alternating fashion. The FEV, and PEFR obtained with the JPF as well a PEFR obtained with the WPF were converted to percent predicted, using normal standards for ventilatory function. In addition, absolute values of […]

Comparison of PEFR and FEV1 in Patients with Varying Degrees of Airway Obstruction

Effect of Modest Altitude Spirometric testing is often used in the assessment of the patient with pulmonary disease. In patients with asthma and other obstructive lung diseases, FEVj and PEFR are widely used to estimate the degree of pulmonary impairment. Both measurements have proved to be excellent methods of following the course of individual patients, […]

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