RE: [ozmidwifery] question

[B & G]

Title: Message

Jenny, Are you referring to partial pressure gradients of O2 and CO2? Simultaneously - when there is no blood flow, placenta to baby cord has stopped pulsating therefore no pressure gradient to push oxygen transfer. Once the baby is exposed to room environment a breath is taken the heart beat of the infant now provides the 'pump' pressure gradient and then you have exchange across the alveolar/capillary membrane. There will always be a oxygen and CO2 level. This was always a very complicated process. Thankfully an understanding of physic principles helps. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of JoFromOz Sent: Saturday, 19 November 2005 9:17 PM To: ozmidwifery@acegraphics.com.au Subject: Re: [ozmidwifery] question Mary Murphy wrote: Jenny, could you give us the reference please?  Thanks, MM “, one study demonstrated zero oxygen, because there is no longer any utero-placental circulation. This is part of the stimulation for the baby to breathe, but the baby is receiving some circulatory volume. “ Jennifer Cameron FRCNA FACM Even if there is no oxygen, I am sure it is still beneficial for the baby to have that volume, though. Jo