OBJECTIVE: Nitrous oxide affects memory and recall. We aimed to determine if using nitrous oxide during labor affected patients\' ability to learn and recall the risks and benefits of neuraxial analgesia.
METHODS: Single-center, prospective cohort study.
METHODS: Labor and delivery unit in a large academic medical center.
METHODS: Nulliparous patients with spontaneous or planned induction of labor.
METHODS: Parturients chose whether to use nitrous oxide during labor. At the discussion for epidural consent, 4 risks were described: headache, infection, nerve damage, bleeding.
METHODS: Labor pain score, time from nitrous oxide discontinuation, and cervical dilation were documented at the discussion of epidural risks. Patients were assessed for unprompted recall and prompted recall of epidural risks on postpartum day 1 and unprompted recall at postpartum week 6. The number and proportion of patients who indicated each true risk (unprompted and prompted recall) or distractor (prompted recall only) were summarized by treatment group and results compared using Pearson χ2 tests.
RESULTS: Of the 403 enrolled patients, 294 (73%) did not use nitrous oxide, and 109 (27%) did. The 2 groups were similar except women who used nitrous oxide were more likely to be cared for by midwives and had higher pain scores at their epidural request. Scores for unprompted or prompted recall of epidural risks were not different between women who received or did not receive nitrous oxide. All 4 risks were recalled unprompted by only 3% in the nitrous oxide group and by 6% in the group not receiving nitrous oxide (P = .18).
CONCLUSIONS: The use of nitrous oxide for labor analgesia does not adversely influence a parturient\'s ability to recall the risks of epidural placement. Patients who receive nitrous oxide for labor analgesia should be considered eligible to provide consent for subsequent procedures.

OBJECTIVE: To identify the predictive value of the neutrophil-to-lymphocyte ratio (NLR) on admission for intrapartum maternal fever in parturients undergoing epidural analgesia (EA).
METHODS: In this retrospective cohort study, propensity score matching (PSM) was applied to address covariates. Univariate and multivariate regression analyses were implemented in sequence to find out the factors influencing intrapartum fever. The receiver operating characteristics curve was applied to determine the area under the curve (AUC) of NLR for intrapartum fever.
RESULTS: NLR and duration of EA were independent risk factors for intrapartum fever. The AUC of the combined indicator (NLR + duration of EA) was higher than that of NLR (AUC = 0.583, 95% confidence interval [CI] 0.53-0.64) and duration of EA (AUC = 0.702, 95% CI 0.66-0.75), reaching 0.715 (95% CI 0.67-0.76; p < 0.001). NLR increased predictive performance for intrapartum fever when added to the duration of EA (net reclassification index 0.076, p = 0.022; integrated discrimination improvement 0.020, p = 0.002).
CONCLUSIONS: NLR has limited predictive power for intrapartum fever. The combination of NLR and duration of epidural analgesia may be considered a promising predictor for intrapartum maternal fever in parturients undergoing epidural analgesia.
CONCLUSIONS: The neutrophil-to-lymphocyte ratio is an accessible predictor for the early identification of parturients at risk of intrapartum fever.

OBJECTIVE: Labor pain can be treated by medical and non-medical analgesia. Smoking during pregnancy has been shown to increase the incidence of several complications and may influence analgesic effectiveness. Previous studies have linked socioeconomic status to the use of epidurals for labor analgesia. We aimed to determine whether smoking and socioeconomic status influence the use of labor analgesia in Finland.
METHODS: From January 1, 2004 to December 31, 2018, we collected data from the national Finnish Medical Birth Register on smoking status, labor analgesia, and socioeconomic status during pregnancy. These categorized variables were presented as absolute numbers and percentages. We included data on singleton pregnancies and excluded any data on pregnancies that missed smoking or socioeconomic status.
RESULTS: 71,603 women smoked during the first trimester, 42,079 women continued to smoke after the first trimester, and 641,449 were non-smokers. The four most used labor analgesia were nitrous oxide, epidural, other medical analgesia, and non-medical analgesia. The most frequently used analgesia was nitrous oxide, which was used by 60.8% of the group of smokers after the first trimester, 58.8% of smokers during the first trimester, and 54.5% of non-smokers. There were no substantial differences between socioeconomic status classes and labor analgesia used.
CONCLUSIONS: Women who continued smoking after the first trimester used labor analgesia more often than non-smokers. There were no clear differences between socioeconomic status classes and labor analgesia used. These findings highlight the need to reduce maternal smoking during pregnancy, and universal social healthcare systems should promote equality in labor analgesia.

BACKGROUND: Labor analgesia plays a crucial role in ensuring a comfortable and positive birthing experience. It provides physiological benefits to both the mother and the child. Knowledge, awareness, and communication between the anesthesiologist and the obstetrician are essential for the safe conduct of labor analgesia. We conducted this cross-sectional online survey amongst obstetric residents to assess their knowledge, attitude, and practices of labor analgesia.
METHODS: A structured questionnaire consisting of 19 questions was circulated amongst obstetric residents of various hospitals via electronic mode of communication. The responses were analyzed using statistical methods.
RESULTS: Among the obstetric residents that we surveyed, 75.7% of them only sometimes employed labor analgesia for their patients. The most commonly employed methods of pain relief are opioids and non-steroidal anti-inflammatory drugs (NSAID). Most of them feel that pain-free labor is necessary because it makes the whole labor process a pleasurable one. Labor analgesia was mostly advocated at patients\' request and demand. The barrier to using labor analgesia was most commonly found to be the non-availability of labor analgesia services.
CONCLUSIONS: Despite the increasing awareness of labor analgesia there still lies a gap between the attitude toward it and the practice of it. Further education to rectify the misconceptions and barriers needs to be taken for providing beneficial services to pregnant females.

BACKGROUND: Labor pain is uniquely experienced and described by the woman giving birth, and it is often considered one of the most excruciating experiences for many women. This study aimed to evaluate factors associated with the willingness to receive labor analgesia among women attending the antenatal clinic at Dr. Bogalech Gebre Memorial General Hospital Central Ethiopia in 2022.
METHODS: An institution-based, cross-sectional study was conducted from January to March 2022. Data were collected using semi-structured questionnaires by a convenience sampling technique. Data was entered in EpiData 4.2 and exported to SPSS version 20 for analysis. Both Bivariable and multivariable logistic regressions were conducted to determine factors associated with pregnant women\'s willingness to choose labor analgesia. Crude odds ratio (COR) and adjusted odds ratio (AOR) were computed to assess the association between variables.
RESULTS: A total of 398 pregnant women have participated in the study with a response rate of 94%. Nearly 30%, (29.4%) of the pregnant women had a willingness to practice labor pain management. Being a housewife (AOR: 8.35, 95% CI: 2.07, 33.63). Women who live in urban (AOR: 2.60, 95% CI: 1.29, 5.29). Having had awareness about labor analgesia (AOR: 1.70, 95% CI: 1.00, 2.60) and the short duration of labor time (AOR: 1.84, 95% CI: 1.15, 2.96) were statistically significant with a willingness to practice labor analgesia.
CONCLUSIONS: We conclude that the willingness of pregnant mothers\' toward obstetric analgesia practice was low in the study area. Being a housewife, urban residence, awareness about labor analgesia, and short duration of labor were statistically significant with the willingness of the mothers to practice labor analgesia. To increase willingness to use labor analgesia, authorities should prioritize delivering health education on pain management choices to address concerns and promote effective methods and practices.

BACKGROUND: Effective pain management during labor induction for pregnancy termination is essential. However, to date, no effective treatment has been identified. The primary aim of this study was to measure the analgesic efficacy of a sufentanil sublingual tablet system during pregnancy termination and patient satisfaction by comparing nulliparous and multiparous women. The secondary aims were to characterize the safety profile by reporting any side effects or adverse events and to determine the need for rescue therapy.
METHODS: We conducted an observational, retrospective, single-center study involving 48 women. The data retrieved for analysis included the total and hourly doses of sublingual sufentanil, evaluations of pain management satisfaction using a 5-point rating scale (ranging from 1, indicating \"not satisfied\" to 5, denoting \"completely satisfied\"), occurrence of side effects and adverse events, and the rate of rescue analgesic use. Categorical and numerical variables were compared between the two groups, and a correlation analysis was performed.
RESULTS: The median total dose of sufentanil required was 60 mcg. Nulliparous women required a higher dose of sufentanil compared with multiparous women (105 mcg vs. 45 mcg; P = 0.01). Additionally, they underwent a longer labor, indirectly measured by the time of device usage (625 min vs. 165 min; P = 0.05). Regarding satisfaction, 40 patients (83.4%) were satisfied or completely satisfied, whereas only 8 patients (16.6%) reported dissatisfaction. Multiparous women exhibited higher satisfaction levels than did nulliparous women (P = 0.03). No adverse events were reported, and the most common side effects were nausea and vomiting (31.2%). Four patients (12%) required acetaminophen due to insufficient analgesia, with only one patient necessitating a switch to intravenous morphine.
CONCLUSIONS: Sublingual sufentanil was effective in both nulliparous and multiparous women with minimal side effects. Therefore, sublingual sufentanil can be considered a valid strategy for analgesia during labor induction for pregnancy termination.

OBJECTIVE: Combined spinal-epidural analgesia (CSEA) is effective but not sufficient for labor pain. This study was conducted to assess the real-time analgesic efficacy, side effects of anesthetic drug dosage, and maternal satisfaction in labor to provide reference for the optimization of labor analgesia.
METHODS: This was a prospective, cohort, single-center study that included 3020 women who received CSEA for labor analgesia. The visual analogue scale (VAS) for labor pain, real-time anesthetic drug dosage, side effects, adverse labor outcomes, factors influencing average drug dosage, and maternal satisfaction with CSEA were assessed.
RESULTS: Overall, the VAS labor pain score was lowest at the first hour after the anesthesia was given. After 4 h for primiparas and 3 h for multiparas, the VAS score was greater than 3 but the anesthetic drug dosage did not reach the maximum allowed dosage at the same time. The average anesthetic drug dosage was positively correlated with fever, urinary retention, uterine atony, prolonged active phase, prolonged second stage, assisted vaginal delivery, and postpartum hemorrhage. The average anesthetic drug dosage was the highest in women ≤ 20 years old, those with a body mass index (BMI) ≥ 24.9 kg/m2, and those with a primary or secondary education level.
CONCLUSIONS: Appropriate age guidance and emphasis on education of labor analgesia, weight management during pregnancy, and real-time anesthetic dosage adjustment during labor based on VAS pain score may have positive effects on the satisfaction of labor analgesia.
BACKGROUND: Clinicaltrials.gov (ChiCTR2100051809).

This case report describes the first known application of an epidural block for labor analgesia in a patient with Melkersson-Rosenthal syndrome (MRS), a rare disorder that may present sudden and threatening airway complications. A tailored epidural protocol effectively mitigated symptom exacerbation, facilitating a complication-free vaginal delivery. This report not only enriches the sparse literature on anesthesia in patients with MRS but also provides a crucial review of perioperative considerations for administering either general or regional anesthesia in similar cases.

UNASSIGNED: To explore the effect of dural puncture epidural (DPE) block technique on fetal heart rate variability (HRV) during labor analgesia.
UNASSIGNED: Sixty full-term primiparas who were in our hospital from April 2021 to October 2021 were selected and randomized into epidural analgesia (CEA) and dural puncture epidural analgesia (DPEA) groups (n = 30). After a successful epidural puncture, routine epidural catheter (EC) was performed in CEA group, and spinal anesthesia needle (as an EC) was used to puncture the dura mater to subarachnoid space in DPE group. Anesthetics were injected through EC. The time when the temperature sensation plane reached T10 (W1) and visual analog pain score (VAS), baseline heart rate score, amplitude variation score, cycle variation score, acceleration score, deceleration score, and total score of the first contraction after W1 were recorded. Apgar scores at 1 min, 5 min, and 10 min of neonates after delivery were recorded.
UNASSIGNED: The onset time of anesthesia in CEA group was significantly longer than that in DPEA group (p < .05). However, there are no significant differences in W1, VAS, baseline heart rate score, amplitude variation score, cycle variation score, acceleration score, deceleration score, and total score of the first contraction after W1 between the two groups (p > .05). Moreover, the Apgar scores at 1 min, 5 min and 10 min of neonates after delivery were not notably different between the two groups (p > .05).
UNASSIGNED: Compared with CEA, DPE block technique in labor analgesia relieves maternal pain without adverse effects on fetal HRV and newborns.

Background and Objectives: Labor epidural analgesia can be maintained through programmed intermittent epidural bolus (PIEB), continuous epidural infusion (CEI), or patient-controlled epidural analgesia (PCEA). Our department changed from CEI+PCEA to PIEB+PCEA as the maintenance method. The higher hourly dose setting in the current regimen brought to our concern that side effects would increase with proportional staff workloads. This study aimed to investigate the validity of our proposal that PIEB+PCEA may function as a feasible tool in reducing the amount of work in the obstetrics anesthesia units. Materials and methods: This 2-year retrospective review included parturients with vaginal deliveries under epidural analgesia. We compared the staff burden before and after the switch from CEI (6 mL/h, PCEA 6 mL lockout 15 min, group A) to PIEB (8 mL/h, PCEA 8 mL lockout 10 min, group B). The primary outcome was the difference of proportion of parturients requiring unscheduled visits between groups. Side effects and labor and neonatal outcomes were compared. Results: Of the 694 parturients analyzed, the proportion of those requiring unscheduled visits were significantly reduced in group B (20.8% vs. 27.7%, chi-square test, p = 0.033). The multivariate logistic regression showed that PIEB was associated with fewer unscheduled visits than CEI (OR = 0.53, 95% CI [0.36-0.80], p < 0.01). Group B exhibited a significantly lower incidence of asymmetric blockade, as well as motor blockade. In nulliparous subjects, obstetric anal sphincter injury occurred less frequently when PIEB+PCEA was used. Significantly more multiparous women experienced vacuum extraction delivery in group B than in group A, and they had a longer second stage of labor. Conclusions: The PIEB+PCEA protocol in our study reduced workloads in labor epidural analgesia as compared to CEI+PCEA, despite that a higher dose of analgesics was administered. Future studies are warranted to investigate the effect of manipulating the PIEB settings on the labor outcomes.