Tom- Here in the sticks, where I believe the law of physics still apply, the fact that you are referring to is a concept in fluid physics whereby fluid moving at increasing speed eventually exceeds laminar flow and induces turbulent flow. Increasing pressure increases turbulence rather than flow. In order to calculate the turbulent flow threshold you need the viscosity of the fluid and the size of the orifice. I learned this form watching the movie My Cousin Vinnie. Best Regards- Kim Burlingham, MD, FAAP -----Original Message----- From: Tom Hargrove <> To: <> Date: Thursday, September 30, 1999 2:51 PM Subject: Re: Diagnosing and Treating AOM in Children with PE Tubes >Using some law from Physics that I forgot a long time ago, it takes about 6 >feet of water depth to force water through the lumen of a standard PE tube. >The ENT literature is pretty clear that ear plugs aren't necessary for most >kids with tubes. Based on my clinical experience, I'm not sure that water >in the ears plays much of a role in purulent drainage from tubes; most of >these patients have cold or allergic rhinitis symptoms also--a more likely >culprit. > >Tom Hargrove, MD, FAAP > > >----- Original Message ----- >From: Vicki L Soloniuk <> >To: Pedtalk <> > >> I would certainly talk to your ENT if there is any question like that. >> On the other hand, my experience has been that this occurs during the >> summer and that they are not keeping their ears as dry as they need to. >> >> Vicki >> > > > > >