pendelluft

pendelluft

 [pen´del-looft″]
the movement of air back and forth between the lungs, resulting in increased dead space ventilation.

pen·del·luft

(pen'del-lŭft), Although in German spelling Pendelluft, like all nouns, begins with a capital letter, its English derivative is spelled with a small p.
Transient movement of gas out of some alveoli and into others when flow has just stopped at the end of inspiration, or such movement in the opposite direction just at the end of expiration; occurs when regions of the lung differ in compliance, airway resistance, or inertance so that the time constants of their filling (or emptying) in response to a change of transpulmonary pressure are not the same.
[Ger. Pendel, pendulum, + Luft, air]

pendelluft

/pen·del·luft/ (pen´del-looft) the movement of air back and forth between the lungs, resulting in increased dead space ventilation.
References in periodicals archive ?
There are several theories to explain this idea of a better ventilation-perfusion ratio: bulk flow, coaxial flow, Taylor dispersion, pendelluft, and augmented molecular diffusion.
Pendelluft is one theory among those studying HFOV and attempts explain why HFOV succeeds in preventing ALI in patients with varying time constants.
The flow velocity profiles of HFOV include bulk convection, Taylor dispersion, asymmetric velocity profiles (coaxial flow velocities), pendelluft phenomena, cardiogenic mixing, molecular diffusion, Brownian movement and collateral ventilation.