What about ST waveform analysis signal quality in the second stage of labor? A case-control study
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Abstract
Aim: This study aimed to investigate ST waveform analysis (STAN) signal quality during the second stage of labor by comparing signal quality in the first and second stages of labor.
Methods: Fifty women who delivered vaginally were randomly selected in a large prospective database including all women with STAN monitoring during labor. Quality signal was analyzed during the second stage of labor (Period B) and during the same period of the first stage of labor (Period A), just preceding active pushing. STAN signal quality was evaluated using seven variables. Main outcome was the presence of at least one signal loss >4 min.
Results: At least one signal loss >4 min was present for, respectively, 4% (95% confidence interval [CI] 0–9.43) of patients in Period A and 28% (95% CI 15.5–40.5) of patients in Period B (P<0.05). A significant difference was detected for all variables analyzed between the two periods (P<0.05).
Conclusion: STAN quality signal deteriorates in the second stage of labor compared to that in the first stage. As guidelines clearly indicate that signal quality influences the decision process, it should be carefully and systematically checked before including STAN analysis in the decision-making.
©2012 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Masthead
- Masthead
- Original Articles – Obstetrics
- Vaginal progesterone to prevent preterm birth in multiple pregnancy: a randomized controlled trial
- Association of high-sensitivity C-reactive protein serum levels in early pregnancy with the severity of preeclampsia and fetal birth weight
- High-fidelity simulation increases obstetric self-assurance and skills in undergraduate medical students
- Resident consultant presence in labour ward after midnight – a retrospective cohort study of 5318 deliveries
- Carboxyhemoglobin levels in umbilical cord blood of women with pre-eclampsia and intrauterine growth restriction
- Labour epidural analgesia and anti-infectious management of the neonate: a meta-analysis
- What about ST waveform analysis signal quality in the second stage of labor? A case-control study
- A curriculum to teach and evaluate resident skills in the management of postpartum hemorrhage
- Placental transfer of clarithromycin in human pregnancies with preterm premature rupture of membranes
- Stepwise sequential screening for Down’s syndrome (combined test associated with modified genetic sonography) in pregnant women with low risk for chromosomal disorders
- Original Articles – Fetus
- Mode of anaesthesia on fetal acid-base status at caesarean section
- Development of integrative autonomic nervous system function: an investigation based on time correlation in fetal heart rate patterns
- Original Articles – Newborn
- Guttus, tiralatte and téterelle: a history of breast pumps
- Does docosahexaenoic acid (DHA) status in pregnancy have any impact on postnatal growth? Six-year follow-up of a prospective randomized double-blind monocenter study on low-dose DHA supplements
- The evolution of risk factors for respiratory syncytial virus-related hospitalisation in infants born at 32–35 weeks’ gestational age: time-based analysis using data from the FLIP-2 study
- Short Communications
- Low placental weight and risk for fetal distress at birth
- Electrical pacemaker as a safe and feasible method for decreasing the uterine contractions of human preterm labor
- Congress Calendar
- Congress Calendar
- WAPM Newsletter
- WAPM Newsletter
