Clinical Study on the Effects of Different Positions on Supine Hypotensive Syndrome in Cesarean Section after Lumbar Anesthesia

Aim: To explore the effects of different positions on supine hypotensive syndrome in cesarean section after lumbar anesthesia. Methods: 600 full-term parturient were randomly divided into 4 groups. The patented positioning pads (patent number: ZL 2017 2 0618886.5) in our department was used in the left-leaning position. The parturient lied in a supine position for anesthesia in, and then the group of positioning pads was placed after turning into the lateral position. The parturient were divided into group A (supine position), group B (left-leaning to 10 °), group C (left-leaning to 20 °), and group D (30 °). Observation index: Main index: Comparison of maternal blood pressure changes and neonatal blood gas analysis in the supine position without using a position pad and with the use of patent positioning pads in different tilt angles (10°, 20°, 30°). Minor index: 1) the use and frequency of vasoactive drugs, whether a left-leaning operating bed or uterine displacement is required; 2) the consciousness of the parturient; 3) newborn’s Apgar scores of 1 minute, 5 minutes, and 10 minutes after birth; 4) whether the obstetrician can perform the operation smoothly in the corresponding left leaning position. Results: The blood pressure at the supine position after anesthesia, the beginning of surgery and the time when the newborn was delivered in group A and group B were significantly different from those in group C (P<0.05). There were significant differences at different timings in group A and group B, and the decline was more significant at the supine position after anesthesia, the beginning of surgery and the time when the newborn was delivered (P<0.05). The pH value of blood gas analysis of newborns in group A, group B and group C was between 7.25 and 7.37, and there was no significant difference between the three groups (P?0.05). Conclusion: The use of positioning pads can prevent the adverse effects of supine hypotensive syndrome on parturient and newborns to a certain extent.

Anesthesia for Cesarean Delivery

Cesarean delivery is a cornerstone of obstetric anesthesia and it is imperative for providers to have a deep understanding of the indications, preparation, techniques, and potential complications of both the procedure and the anesthesia. It is necessary to obtain a focused but thorough history and physical and to develop an appropriate individual by considering a multitude of factors including co-morbid maternal and fetal conditions, timing of delivery, technical needs of the surgeon, potential adverse events, and systems based decision making. Anesthesia providers need to determine the safest method to provide anesthesia for the mother with an aim to minimize risk to the fetus. Once the decision of which anesthetic technique will be utilized is made, the provider must have the knowledge of how to best execute the plan and remain vigilant by maintaining a back-up plan in the case of complications. Obstetric anesthesia for cesarean delivery carries a set of unique challenges and potential risks in addition to the standard risks associated with general and neuraxial anesthesia. This review contains 5 figures, 6 tables, and 86 references. Keywords: Maternal Physiology, Maternal-Fetal Considerations, Systemic Medications, Cesarean Delivery, Difficult Airway, Aspiration Prophylaxis, Supine Hypotensive Syndrome, Aspiration of Gastric Contents, Vaginal Birth After Cesarean Section (VBAC)

Aortocaval compression resulting in sudden loss of consciousness and severe bradycardia and hypotension during cesarean section in a patient with subvalvular aortic stenosis

Background Maternal cardiac arrest during cesarean section (CS) is an extremely rare but devastating complication. Preventing emergency events from developing into maternal cardiac arrest is one of the most challenging clinical scenarios. Case presentation A 35-year-old pregnant woman with subvalvular aortic stenosis who was scheduled for elective CS under epidural anesthesia, and experienced devastating supine hypotensive syndrome, but was successfully resuscitated after delivery. Conclusions The performance of tilt position strictly or high-quality continue manual left uterine displacement (LUD) should be performed until the fetus is delivered, otherwise timely delivery of the fetus may be the best way to optimize the deadly condition.

Aortocaval compression resulting in sudden loss of consciousness and severe bradycardia and hypotension during cesarean section in a patient with subvalvular aortic stenosis

Background: Maternal cardiac arrest during cesarean section (CS) is an extremely rare but devastating complication. Preventing emergency events from developing into maternal cardiac arrest is one of the most challenging clinical scenarios. Case presentation: A 35-year-old pregnant woman with subvalvular aortic stenosis (SAS) who was scheduled for elective CS under epidural anesthesia, and experienced devastating supine hypotensive syndrome, but was successfully resuscitated after delivery. Conclusions: The performance of tilt position strictly or high-quality continue manual left uterine displacement (LUD) should be performed until the fetus is delivered, otherwise timely delivery of the fetus may be the best way to optimize the deadly condition. Keywords: Subvalvular aortic stenosis, Pregnancy, Cesarean section, Hypotension.