Intraoperative Fetal Heart Rate Monitoring During Nonobstetric Surgery in Pregnancy: A Practice Survey:

Acute Intracranial Hypertension During Pregnancy: Special Considerations and Management Adjustments

Pregnancy is associated with a number of pathophysiological changes (including modification of vascular resistance, increased vascular permeability, and coagulative disorders) that can lead to specific (eclampsia, preeclampsia) or not specific (intracranial hemorrhage) neurological complications. In addition to these disorders, pregnancy can affect numerous preexisting neurologic conditions, including epilepsy, brain tumors, and intracerebral bleeding from cerebral aneurysm or arteriovenous malformations. Intracranial complications related to pregnancy can expose patients to a high risk of intracranial hypertension (IHT). Unfortunately, at present, the therapeutic measures that are generally adopted for the control of elevated intracranial pressure (ICP) in the general population have not been examined in pregnant patients, and their efficacy and safety for the mother and the fetus is still unknown. In addition, no specific guidelines for the application of the staircase approach, including escalating treatments with increasing intensity of level, for the management of IHT exist for this population. Although some of basic measures can be considered safe even in pregnant patients (management of stable hemodynamic and respiratory function, optimization of systemic physiology), some other interventions, such as hyperventilation, osmotic therapy, hypothermia, barbiturates, and decompressive craniectomy, can lead to specific concerns for the safety of both mother and fetus. The aim of this review is to summarize the neurological pathophysiological changes occurring during pregnancy and explore the effects of the possible therapeutic interventions applied to the general population for the management of IHT during pregnancy, taking into consideration ethical and clinical concerns as well as the decision for the timing of treatment and delivery.

Meningioma during pregnancy: what can influence the management? A case series and review of the literature

Purpose: Meningioma is a benign tumor, more frequent in female population. During pregnancy, distinguishing a meningioma from other common conditions presenting with similar symptoms (headache, vomiting, visual impairment) is challenging. Moreover, the management must consider not only maternal but also fetal health. The rarity of the condition does not allow to define the features to which look in order to stratify the risk for the need of surgery during pregnancy. We reported three cases of meningioma in pregnant women treated at our department and reviewed those previously reported in the literature. The aim of this review is to evaluate which factors are more determinant in such management.Methods: Electronic databases were searched from year 2000 until June 2020, to identify clinical studies on management of meningioma diagnosed during pregnancy. The primary outcome was surgical timing. Secondary outcomes were delivery methods, maternal and neonatal outcomes.Results: Surgery after pregnancy is more frequently performed in PR + tumor (p-value 0.038) and with HA (p-value 0.0445), as well as in meningioma diagnosed during the third trimester, compared to those diagnosed before (p-value 0.0012). Surgery during pregnancy was more frequent in patients with visual loss (p-value 0.006). No significant differences were found in surgical management, according to age, WHO grade, tumor location, lesion diameter and ER positivity. Delivery method is independent from both hormonal receptor status and main symptoms, but women who had neurosurgery during pregnancy delivered more frequently with spontaneous vaginal delivery (p-value <0.01).Conclusion: The decision regarding surgical timing of meningioma diagnosed during pregnancy depends on PR + and impending symptoms as visual loss or headache. It seems that timing of neurosurgery does not affect the delivery method. A multidisciplinary approach is always useful to perform a rapid and appropriate diagnosis and to better evaluate pros and cons of surgery during pregnancy and following management both for maternal and fetal wellness.

Fetal heart rate monitoring in nonobstetric surgery: a systematic review of the evidence

OBJECTIVE

Concern for fetal well-being during maternal nonobstetric surgery may result in obstetricians and other maternity care providers being asked to perform intraoperative fetal heart rate (FHR) monitoring. We systematically reviewed the evidence regarding the use of FHR monitoring during nonobstetric surgery after potential fetal viability (>22 weeks gestational age), and examined the FHR patterns and outcomes reported.

DATA SOURCES

A systematic review of the evidence was performed. Sources included databases (MEDLINE, EMBASE, Cochrane, and CENTRAL), hand searching, guidelines, conference proceedings, and literature reviews. Online searching was performed to include literature published from 1966 to May 2019.

STUDY ELIGIBILITY CRITERIA

All studies reviewing care of pregnant women undergoing nonobstetric surgery where FHR monitoring was performed intraoperatively. Data were extracted from appropriate full-text articles using a data abstraction form.

STUDY APPRAISAL AND SYNTHESIS

Case reports and case series only were identified. A total of 74 cases were reviewed, encompassing maternal general surgery (n = 41, cardiovascular surgery (n = 13) and neurosurgery/orthopedics (n = 20). Median gestational age at time of maternal surgery was 30 weeks (range, 22-36 weeks). In 41 cases, findings of FHR monitoring were not reported. Abnormal tracings were observed in 29 cases, as either reduced variability (n = 13) or fetal bradycardia (n = 17). All but 3 bradycardias reported occurred during maternal cardiac surgery involving aortic clamping and cardiopulmonary bypass. In 1 case, FHR monitoring was not possible because of a surgical pneumoperitoneum; there was 1 fetal tachycardia associated with maternal pyrexia, and three cases in which FHR monitoring was deemed stable or normal. Three preterm infants were delivered simultaneously at the time of general surgery as a result of FHR abnormalities (at 30, 33, and 34 weeks respectively), 2 as a result of fetal bradycardia and 1 because of protracted reduced variablity.

CONCLUSION

The evidence for intraoperative fetal monitoring is based on case reports and cases series. Maternal cardiac surgery involving cardiopulmonary bypass commonly results in fetal bradycardia, which may be challenging to interpret. Obstetricians should be aware of FHR pattern changes in response to anesthesia and surgery that do not justify iatrogenic preterm cesarean delivery.

Diskectomy during Pregnancy: Case Report and Review of the Literature

Study Design Case report. Objective The purpose of this report is to discuss the management of a disk herniation during pregnancy and the indication and particularities of surgery in this situation. Methods We describe a case of diskectomy performed in a 35-year-old woman at 18 weeks of gestation. After 4 weeks of trying to manage the disk herniation with rest and medications without success, the muscle strength of the L5 right root decreased to grade 4, and the patient was not responding to intravenous analgesia. After discussion with the patient and family, a decision was made to perform the diskectomy. Results After surgery, the patient's pain lessened, and the Lasegue test became negative. Two weeks after the procedure, the patient's muscle strength was normal. In the 40th week of pregnancy, the patient gave birth without any complications. Conclusion When necessary, diskectomy can be indicated and performed during pregnancy. However, appropriate precautions must be taken. Awareness of these precautions is important for the success of the procedure and for the well-being of the mother and the newborn.

Antepartum nonobstetrical surgery at ≥23 weeks' gestation and risk for preterm delivery

OBJECTIVE

We sought to describe the influence of antepartum nonobstetrical surgical procedures performed at viable fetal gestational ages (GAs) on incidence of preterm delivery.

STUDY DESIGN

This was a retrospective case series of patients requiring nonobstetrical surgery at ≥23 weeks' gestation at the Mayo Clinic during the interval 1992 through 2014. Data were abstracted for maternal demographic variables, operative procedure, anesthetic type, whether intraoperative fetal monitoring was employed, and both GA and method of delivery.

RESULTS

In all, 111 patients underwent 121 operative procedures at a mean GA of 29.2 weeks (range, 23-37 weeks). The majority of procedures were completed under general anesthesia (88/121, 73%), with intraoperative fetal monitoring performed in 14 cases (14/121, 12%); fetal loss occurred during a single unmonitored procedure. Outcome data were available for the majority of patients (86/111, 78%) with preterm delivery occurring in 41% (35/86) at a mean GA of 36.9 weeks (range, 25-41 weeks). Mean interval from procedure to delivery was 7.7 weeks, with 9 patients (9/86, 10%) delivering within 1 week of surgery. Neither procedures requiring entry into the abdominal cavity (P = .65) nor GA at time of procedure (P = 1.0) statistically influenced the risk of preterm delivery.

CONCLUSION

Nonobstetrical surgical procedures performed at or beyond fetal viability increased the incidence of preterm delivery regardless of surgical site or timing of procedure, however the risk of intraoperative or immediate postoperative obstetrical complications was relatively low.

[Silent cardiotocogram during general anesthesia. Indication for emergency Cesarean section?]

This case report of a silent cardiotocogram (CTG) registration during general anesthesia in a 33-week-pregnant patient undergoing non-obstetric surgery demonstrates the possibility of misinterpretation whereby typical CTG patterns of fetal reactions to anesthetics can be misinterpreted as fetal hypoxia or even asphyxia.