Error traps in anesthesia for fetal interventions

Cesarean section with operation on placental support as an adapted EXIT procedure for fetal thyroid goiter: A case report and literature review

The ex-utero intrapartum treatment (EXIT) procedure is a specialized delivery strategy that extends utero-placental-fetal circulation to convert a potential neonatal emergency condition into a condition that is compatible with postnatal life. Cesarean section with operation on placental support is an EXIT technique that requires a relatively short duration of placental support and few skilled medical personnel and specialized instruments; it can successfully treat selected fetal indications. In the present study, we report a case of fetal thyroid goiter as an example of a fetal anomaly requiring the procedure. We then review all cases published in the medical literature that were similar to our procedure (15 cases including our new case). Twelve (80%) cases of fetal anomalies and three prophylactic cases of extremely low birth weight were delivered using a procedure adapted from the standard EXIT procedure. All 12 cases of fetal anomalies were treated by airway intervention. In 12 of the 15 cases (80%), direct laryngoscopy and endotracheal intubation were attempted; intubation was successful in seven of these 12 cases (58%). There was only one case of postpartum hemorrhage caused by uterine incisional bleeding, with a consequence of delayed hysterotomy closure. In summary, cesarean section with operation on placental support is a promising alternative delivery technique for neonates with airway obstructive lesions, especially in resource-limited settings.

"This is how we do it" Maternal and fetal anesthetic management for fetoscopic myelomeningocele repairs: the Texas Children's Fetal Center protocol

Prenatal repair of myelomeningocele (MMC) is associated with lower rates of hydrocephalus requiring ventriculoperitoneal shunt and improved motor function when compared with postnatal repair. Efforts aiming to develop less invasive surgical techniques to decrease the risk for the pregnant patient while achieving similar benefits for the fetus have led to the implementation of fetoscopic surgical techniques. While no ideal anesthetic technique for fetoscopic MMC repair has been demonstrated, we present our anesthetic approach for these repairs, including considerations for both the pregnant patient and the fetus. We emphasize the importance of the preoperative consultation to optimize any medical conditions and to set expectations for the perioperative course. Our preferred anesthetic technique for the pregnant patient includes general anesthesia with an epidural for postoperative analgesia. Intraoperative anesthetic considerations for patients undergoing fetoscopic surgery include tocolysis, meticulous control of hemodynamics, judicious fluid administration, and maternal temperature regulation. We also avoid long-acting neuromuscular blocking agents due to significant weakness observed when given in combination with magnesium sulfate. While the maternal anesthetic crosses the placenta, direct administration of anesthesia to the fetus is required to reliably blunt the stress response. Additional considerations for the fetus include monitoring, fetal resuscitation strategies, and the theoretical risk of anesthetic neurotoxicity. Postoperatively, we use a multi-modal, opioid sparing regimen for analgesia. As advances in fetal surgery aiming to minimize risk to the pregnant patient alter the surgical approach, maternal-fetal anesthesiologists must adapt and incorporate the unique considerations of fetoscopy into their anesthetic management.

Anesthetic considerations for fetal interventions

Fetal therapy is a well-established but rapidly evolving field discipline. Fetal interventions require a multidisciplinary team approach that emphasizes collaboration and communication. The success of a fetal therapy program relies on the availability of a comprehensive obstetric and neonatal care team, support services, and advanced imaging. Technological advancements in prenatal fetal imaging and genetic diagnosis have improved our understanding of various fetal anomalies. Surgical techniques and anesthetic management have also advanced, leading to better outcomes. Fetal anesthesia presents unique challenges as it involves managing both the mother and the fetus. Anesthetic management focuses on ensuring maternal safety and comfort, maintaining adequate uteroplacental perfusion, optimizing surgical conditions, and minimizing risks for both the mother and the fetus. This article reviews current anesthesia practices for fetal surgery, highlighting recent advances and future directions.

Fetal and Neonatal Anesthesia

Anesthesia for fetal and neonatal surgery requires subspecialized knowledge and expertise. Attention to important anatomic, physiologic, and metabolic differences seen in pregnancy and at birth are essential for the optimal care of these patients. Thorough preoperative evaluations tailored intraoperative strategies and careful postoperative management are critical when devising the anesthetic approach for each of these cases.