Haemodynamic consequences and uterine contractions following 0.5 or 1.0 litre crystalloid infusion before obstetric epidural analgesia
| Autor: | Ola P. Rosaeg, Jorge E. Zamora, M. Patrice Lindsay, Mary Lou Crossan |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Adult
Ringer's Lactate Lidocaine medicine.drug_class Uterus Hemodynamics Uterine Contraction Pregnancy Heart rate medicine Humans Prospective Studies business.industry Local anesthetic General Medicine Heart Rate Fetal medicine.disease Analgesia Epidural Anesthesiology and Pain Medicine medicine.anatomical_structure In utero Anesthesia embryonic structures Analgesia Obstetrical Female Hypotension Isotonic Solutions business Perfusion medicine.drug |
| Zdroj: | Canadian journal of anaesthesia = Journal canadien d'anesthesie. 43(4) |
| ISSN: | 0832-610X |
| Popis: | The efficacy of infusion of 0.5 L and 1.0 L Ringer's lactate (LR) to prevent hypotension during induction of obstetric analgesia was studied. The effect of the different fluid boluses on fetal heart rate (FHR) and frequency of uterine contractions were also determined.Ninety-two ASA 1-2 parturients were randomized to receive 0.5 L (Group 1) and 1.0 L (Group 2) LR immediately before incremental epidural injections with lidocaine to achieve T10 sensory block. Systolic blood pressure (SBP) was measured with an automated BP cuff every two minutes for 30 min after infusion of fluid bolus. Fetal heart rate monitoring and tocometry were used continuously. The number of uterine contractions were recorded 30 min before and 60 min after i.v. bolus.The SBP decreased in both groups, but there was no difference between groups in mean SBP or maternal heart rate. The incidence of hypotension (SBP90 mmHg or decrease of 20%) was 4% in both groups. The FHR record of a patient in Group 1 showed a single late deceleration, and a decrease in beat-to-beat variability occurred in one patient in Group 2. A decrease in the frequency of uterine contractions of two or more contractions per 30 min was noted more frequently in Group 2 (P0.05). The duration of iv bolus was longer in Group 2 than Group 1 (18.8 +/- 4.3 min vs 12.3 +/- 4.5 min, P0.01).Administration of 1.0 L LR i.v. does not provide added protection against maternal hypotension, and is associated with delay in providing pain relief and a risk of decreasing uterine contraction frequency. |
| Databáze: | OpenAIRE |
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