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Re: OB:Home Births in AustraliaFrom: Braun, R. Daniel (rbraun@iupui.edu)Mon Aug 31 15:40:24 1998
Can you please remember to add a signature file to your posts? I keep forgetting who is YTDP43A and who is WFBQ69G etc. I refer you to "An introduction to Fetal Heart Rate Monitoring" by Edward H. Hon, Harty Press Inc. New Haven, Connecticut, 1971 P. 8 Fig 1-2 Actual Count Range of Counting 75 70-116 84 70-88 96 94-100 104 94-120 130 120-142 146 132-152 186 152-220 204 148-212 OK so it wasn't off by 50 but that was a long time ago and it was still off by 35 when you got up to the 180 range.. Dan -----Original Message----- From: YTDP43A@prodigy.com [SMTP:YTDP43A@prodigy.com] Sent: Monday, August 31, 1998 2:16 PM To: Multiple recipients of list Subject: RE: OB:Home Births in Australia RE<< dan<<<Studies done in the early 70's showed that professionals listening to tapes of fetal heart sounds and counting them were not very accurate at all especially if the heart rate was above 150 or below 130. The errors were frequently in the range of 50 BPM.<< well, the human ear/brain partnership is certainly not as accurate as a machine, but I can't imagine ANYONE mistaking a FHR of 150 for one of 200! I think we can expect a more usual error rate of perhaps 10bpm. And is that common error range actualy crucial? Many handheld dopplar stethoscopes these days have a readout to confirm FHR. Haven't many of us though had the opposite experience of "hearing" a certain rate even though the electronic readout is artifactualy giving an obviously erroneous rate?
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