I'm curious about monitoring my lung capacity weekly with a peak flow meter. It consistently shows 350 to 400 LM, which stays within the green zone, and although I feel okay, I'm wondering if that's sufficient to keep track of my lung health. Since being diagnosed with bronchitis, I've become increasingly concerned about my lungs, especially because of the thick phlegm. Should I be doing more than just the peak flow meter, like maybe a pulmonary function test, to get a clearer picture of my lung function? Id appreciate some advice on this.

do pulmonary function test once ,no need to repeat every week