The effects of continuous epidural analgesia on Doppler velocimetry of uterine arteries during different periods of labour analgesia.
Br J Anaesth
; 96(2): 226-30, 2006 Feb.
Article
em En
| MEDLINE
| ID: mdl-16377645
ABSTRACT
BACKGROUND:
The transient effects of epidural bupivacaine 0.25-0.5% on the Doppler velocimetry of umbilical and uterine arteries had been reported, but the effects of continuous lower dose epidural bupivacaine (0.05-0.1%) infusion for labour analgesia have never been reported. In this study, we evaluated the effects of continuous epidural bupivacaine 0.075% on the Doppler velocimetry of uterine arteries.METHODS:
Twenty pregnant women for labour analgesia received continuous epidural bupivacaine 0.075% infusion. We used a 4-MHz continuous-wave Doppler probe (Multigon 500A) with a 200 Hz thump filter to detect uterine blood flow velocity. We recorded the velocimetry data for uterine relaxation and contraction during five time periods pre-epidural insertion, 1, 2, and 4 h post-epidural infusion, and after delivery of fetus.RESULTS:
Our data showed that the velocimetric indices of uterine vascular resistance were significantly increased 1, 2, and 4 h after epidural infusion when compared with the pre-epidural level; these returned to the baseline after delivery.CONCLUSION:
Continuous epidural analgesia with bupivacaine 0.075% increases the resistance of uterine artery and therefore possibly reduces the uterine blood flow.
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Base de dados:
MEDLINE
Assunto principal:
Útero
/
Bupivacaína
/
Analgesia Epidural
/
Analgesia Obstétrica
/
Anestésicos Locais
Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article