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Different Schemes of Magnesium Sulfate for Preeclampsia

Effectiveness and Safety of 1g/Hour vs. 2g/Hour of Magnesium Sulfate Maintenance Dose for Eclampsia Prevention: Randomized Clinical Trial

Status
Terminated
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02396030
Acronym
MGSO4
Enrollment
62
Registered
2015-03-24
Start date
2015-03-31
Completion date
2016-12-31
Last updated
2016-12-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Preeclampsia

Brief summary

Eclampsia is an obstetric emergency capable of prophylaxis. To prevent and control seizures, there is no doubt that the magnesium sulfate (MgSO4) is the ideal drug. However, there are still questions regarding its use and dose. The scheme and the optimal time of administration remain to be elucidated. The objective of this trial is to compare the effectiveness and safety of intravenous magnesium sulfate in the maintenance phase 1g / h versus 2 g / h to prevent eclampsia in pregnant and postpartum women with severe preeclampsia (pure or superimposed).

Detailed description

Hypertensive disorders are frequent during the course of pregnancy-puerperal cycle and an important cause of maternal morbidity and mortality, fetal and perinatal. The high frequency of maternal death can be explained by the presence of numerous complications such as eclampsia. Eclampsia is an obstetric emergency capable of prophylaxis. To prevent and control seizures, there is no doubt that the magnesium sulfate (MgSO4) is the ideal drug. However, there are still questions regarding its use and dose. The scheme and the optimal time of administration remain to be elucidated. Currently, allows the use of either 1 g / h to 2 g / h of magnesium sulphate during the maintenance phase to prevent eclamptic convulsions. However, there is no report in the literature of randomized controlled trials comparing different doses of magnesium sulfate in the maintenance phase to prevent eclampsia. The objective of this study is to compare the effectiveness and safety of intravenous magnesium sulfate in the maintenance phase 1g / h versus 2 g / h to prevent eclampsia in pregnant and postpartum women with severe preeclampsia (pure or superimposed).There will be a trial randomized and triple blind in the Integrative Medicine Institute Prof. Fernando Figueira (IMIP) from March 2015 to April 2017, and will be included 2000 women randomized into two groups: MgSO4 maintenance dose of 1 g / h or 2 g / h. Patients who had eclampsia before loading dose, with use of other medications or illicit drugs that may interfere with maternal hemodynamics or with contraindications to the use of magnesium sulfate will be excluded. The primary endpoint will be the incidence of eclampsia. Other complications such as oliguria, bleeding, recurrence of seizures, disseminated intravascular coagulation, maternal death, presence of side effects related to the use of MgSO, neonatal outcome and other variables will be considered secondary outcomes. Randomization for preventive treatment of eclamptic seizures with MgSO4 1g / h or MgSO4 2g / h will be held according to a table of sequential numbers from one to 2000, using the letters A and B and not knowing its meaning. The analysis will be performed with the groups identified as A or B, breaking the secrecy only after the results obtained and prepared the tables, or by resolution of the External Monitoring Committee.

Interventions

Patients will receive after the loading dose os magnesium sulfate, the maintenance dose of 1g/hour of intravenous of magnesium sulfate for 24 hours after loading dose

DRUGMagnesium sulfate 50% - 2g/h

Patients will receive after the loading dose os magnesium sulfate, the maintenance dose of 1g/hour of intravenous of magnesium sulfate for 24 hours after loading dose

Sponsors

Instituto Materno Infantil Prof. Fernando Figueira
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
TRIPLE (Subject, Caregiver, Investigator)

Eligibility

Sex/Gender
FEMALE
Age
14 Years to 50 Years
Healthy volunteers
No

Inclusion criteria

* Severe Preeclampsia (pure and superimposed)

Exclusion criteria

* Eclampsia before administration of the loading dose of MgSO4 ; * Use of other medications or illicit drugs that may interfere with maternal hemodynamics; * Contraindications to the use of magnesium sulfate: known hypersensitivity to the drug, oliguria with urine output below 25 ml per hour or anuria (urine output absent) and myasthenia gravis. * Use of mechanical ventilation

Design outcomes

Primary

MeasureTime frameDescription
ECLAMPSIAFrom end of loading dose, until 24 hours after deliverySeizures that occur after the loading dose, during magnesium sulfate, until 24 hours after the delivery of the baby

Secondary

MeasureTime frameDescription
postpartum hemorrhageFrom end of loading dose, until 48 hours after deliveryOccurence of postpartum hemorrhage, diagnosed clinically by the attending phisician
COMPLICATIONSFrom end of loading dose, until 3 hours after deliveryOccurence of a retained placenta
thromboembolic complicationsFrom end of loading dose, until 15 days after deliveryDiagnosis of thromboembolic complications bay doppler compression ultrasound or CT
liver failureFrom end of loading dose, until 15 days after deliveryOccurence of liver failure according to laboratorial exams
OLIGURIAFrom end of loading dose, until 15 days after deliveryOliguria diagnosed as the presence of urine output under 0.5 (mililiters per kilogram) mL/kg for six hours,
RENAL FAILUREFrom end of loading dose, until 15 days after deliveryOccurence of renal failure diagnosed as the presence of oliguria for more than 24 hours or elevation serum creatinine (3X )
Disseminated intravascular coagulation (DIC)From end of loading dose, until 15 days after deliveryPresence of disseminated intravascular coagulation
acute pulmonary edemaFrom end of loading dose, until 15 days after deliveryPresence of clinically diagnosis of acute pulmonary edema
Placental abruptionFrom end of loading dose, until delivery of the childOccurence of placental abruption
Composite maternal morbidityFrom end of loading dose, until 42 days after deliveryPresence of one of the investigated complications
RECURRENCEFrom end of loading dose, until 24 hours after deliveryRecurrence of seizures after loading dose of magnesium sulfate
additional anticonvulsantFrom end of loading dose, until 24 hours after deliveryNeed for additional anticonvulsant after the use of magnesium sulfate
SIDE EFFECTSFrom end of loading dose, until 24 hours after deliveryPresence of side effects of magnesium sulfate use
DISCONTINUATION OF MAGNESIUM SULFATEFrom end of loading dose, until 24 hours after deliveryOccurence of discontinuation of treatment due to side effects
GLUCONATE USEFrom end of loading dose, until 24 hours after deliveryNeed for the use of calcium gluconate
MAGNESIUM LEVELSFrom end of loading dose, until 24 hours after deliverySerum magnesium levels evaluated at the beginning of maintenance dose and after 30. minutes, every 2 hours for six hours and after every six hours until 24 hous after loading dose. This outcome will be evaluated in the first 62 patients
Hypertensive crisesFrom end of loading dose, until 24 hours after deliveryPresence of hypertensive crises and need for antihypertensive drugs and need to continue therapy for more than 24 hours.
Maternal deathFrom end of loading dose, until 42 days after deliveryMaternal death occuring for direct obstetric causes

Countries

Brazil

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026