http://www.cs.nott.ac.uk/~jmg/papers/brjog-94.pdf This is very interesting as it analysed how gases were taken.
http://www.clinchem.org/cgi/content/full/44/3/681 This is the extract from this study that showed no difference between room temp:- The first null hypothesis was that there was a difference between the two samples of each group, caused by the methodology of blood sampling and analysis. The data shown in Table 1 , however, indicate no significant differences between the two samples; therefore, the rejection of the null hypothesis implies high reproducibility of the method. The second null hypothesis suggested a difference between samples tested immediately and those tested after storage for 1 h in the refrigerator, caused by the effect of time and temperature. The data shown in Table 1 indicate no significant difference between the mean values of all analytes tested in both groups. The third null hypothesis suggested a difference between samples examined immediately and after storage of 1 h at room temperature, caused by the effect of time. However, the data shown reject this hypothesis and suggest that a period of 1 h has no effect on the analytes tested. The fourth null hypothesis was that temperature had an effect on the test results. The data shown in Table 1 also reject this hypothesis and suggest that temperature alone does not affect the tested variables.
Thanks Lisa Barrett----- Original Message ----- From: "Christine Holliday" <[EMAIL PROTECTED]>
To: <ozmidwifery@acegraphics.com.au> Sent: Wednesday, October 18, 2006 8:54 AM Subject: RE: [ozmidwifery] cord blood gases
Lisa, I am hoping you are still reading this list and can send me the references regarding the length of time before the results for cord gases deteriorate and not needing to put them on ice as I asked earlier. If you wish to email them to me off line that is OK and I will forward them to group. Thanks Christine -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Lisa Barrett Sent: 13 October 2006 21:08 To: ozmidwifery@acegraphics.com.au Subject: Re: [ozmidwifery] cord blood gasesWe do these only if we suspect some fetal compromise during labour or an unexpected problem at birth, the suggestion that they are done at every birth is a defensive issue and indeed I have found that the results often support your actions during labour i.e. in not intervening sooner and I try and do them if I think there may be a problem of some sort, sorry this is vague. If you are busy a good trick is to use two clamps on the cord tohold the blood in the cord and if you take it within 30 mins and get it in ice and to the labs the results are still OK to use. Of course you cannotdo this with a physiological 3rd stage but I can't think you would need cord gases if all was well enough for a physiological 3rd stage.It is a defensive issue to do them at all. It is only ever to cover yourselfeven if it's to back up not intervening.Why would you suspect fetal compromise in labour that wasn't proven by fetal compromise at birth and then what would a gas achieve. Either you were rightor wrong. If you are busy a good trick is to get someone else to care for the other women at the time of birth so you don't have to put the cord blood on ice. Better still don't do one. If all doesn't go well and you have a baby needing resus, all the research tells us not to cut the cord, the way that a compromised baby still is getting oxygen.To do a procedure you should have evidence to back up it's necessity. Thereis none for blood gas. Just as there is none for continuous monitoring. It's practice in fear and no good to anybody. Lisa BarrettI am not a supporter of doing them at every birth as it is anotherdistraction from caring for the mother and baby but it is helpful to support your care and the results can influence the treatment/care of a baby making the care more appropriate. Christine -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Naomi Wilkin Sent: 13 October 2006 17:37 To: ozmidwifery@acegraphics.com.au Subject: [ozmidwifery] cord blood gases Hi all, Just wondering how common it is for cord blood gases to be done in maternity units. I work in a small metro. hospital with a very busy maternity unit and our medical 'powers that be' are pushing for them to be done at every birth. Something we, the midwives, are very, very reluctant to do. I was also wondering if anyone knows of any research that may help us to prevent this from becoming a routine thing. Thanks Naomi. -- This mailing list is sponsored by ACE Graphics. Visit <http://www.acegraphics.com.au> to subscribe or unsubscribe. -- This mailing list is sponsored by ACE Graphics. Visit <http://www.acegraphics.com.au> to subscribe or unsubscribe.-- This mailing list is sponsored by ACE Graphics. Visit <http://www.acegraphics.com.au> to subscribe or unsubscribe. -- This mailing list is sponsored by ACE Graphics. Visit <http://www.acegraphics.com.au> to subscribe or unsubscribe.
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