Lung Function test

[topekayode]

Am a SPL holder, been at my training for a while now,
been having problems with my lung function test.
My 1st aviation took months just cos of the lung function test not coming well
I grew up with asthma, and I would say its controlled
I have since been grounded for months now,
cos after I went for my renew the same problems came up again
I want to ask for tips on how to manage this situation,
Besides the 1st aviation medical, it took like 8 blows that almost left me fainting
before I got the graph right,
Is there a technique to the blowing

Thanks

[LeeP-PA28]

Relax before the test. Nice deep breaths in, holding it and out. Controlled breathing just as you would under an attack situation.

When doing the test, it's all about thrust! So a quick and deep breath in and then as hard as you can out. It will likely give you a little tickly cough for a few seconds afterwards.

Use a peakflow meter, you can pick them up for a few pounds on the internet now. You want to be aiming at blowing around 400-450 for a positive pass :)

[cavortingcheetah]

I don't wish to put a damper on any one's puff but if you're a man blowing 400-450 on a peak flow meter, that'd make you a short statured eighty year old?
That's subject to expert qualification of course.

[LeeP-PA28]

From what my GP told me, 450 is minimum for the Class 2 DVLA issue (or that required for NPPL).

I've been asthmatic all my life and when at 16 (with controlled asthma) was blowing 300 at best. Now 26, I blow about 580 average with use of medication only over the heyfever season.