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Related Concept Videos

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Calcium channel blockers, a class of antiepileptic drugs, regulate the flow of calcium ions within neurons.
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The nursing management of Mitral Valve Prolapse, or MVP, centers around patient education, symptom monitoring, and lifestyle modifications.Patient Education on MVP Diagnosis and Heredity: Nurses should provide comprehensive education about MVP, a condition where the mitral valve does not close appropriately during heartbeats. This education often includes the condition's pathophysiology, symptoms, and potential complications, like arrhythmias or mitral regurgitation. Though not fully...
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The diagnosis of renal calculi involves several imaging techniques, including non-contrast CT scans and ultrasound. These methods help visualize kidney stones, assess their size and location, and detect possible obstructions. Additionally, Measuring urine pH is useful for diagnosing specific stone types, such as struvite (alkaline pH) and uric acid stones (acidic pH). Cystine stones are primarily linked to cystinuria, a genetic condition. A urinalysis helps detect blood in the urine (hematuria)...
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Related Experiment Video

Updated: Apr 16, 2026

Laminectomy for the Removal of Thoracic Ossification of the Ligamentum Flavum TOLF Using Ultrasonic and Conventional Osteotomes
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[Maintenance tocolysis with calcium channel blockers].

E Maisonneuve1, B Carbonne1

  • 1Unité d'obstétrique-maternité, hôpital Trousseau, Assistance publique-Hôpitaux de Paris, université Pierre-et-Marie-Curie, 26, avenue du Docteur-Arnold-Netter, 75012 Paris, France.

Journal De Gynecologie, Obstetrique Et Biologie De La Reproduction
|March 3, 2015
PubMed
Summary

Maintenance tocolysis, prolonging pregnancy beyond 48 hours with medications like nifedipine, does not prevent preterm birth or improve infant outcomes. Extended tocolytic therapy offers no proven benefits for high-risk pregnancies.

Keywords:
Accouchement prématuréCalcium channel blockersInhibiteurs calciquesMaintenance tocolysisNicardipineNifedipineNifédipinePreterm deliveryTocolyseTocolyse d’entretienTocolysis

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Area of Science:

  • Obstetrics and Gynecology
  • Maternal-Fetal Medicine
  • Pharmacology

Context:

  • Initial tocolysis aims to prolong pregnancy for 48 hours, facilitating fetal lung maturation with corticosteroids.
  • Maintenance tocolysis involves extending tocolytic therapy beyond 48 hours, despite 2002 guidelines advising against it.
  • Approximately 60% of obstetricians currently prescribe maintenance tocolysis, often using nifedipine.

Purpose:

  • To evaluate the efficacy of maintenance tocolysis in prolonging pregnancy and improving perinatal outcomes.
  • To assess whether extending tocolytic therapy beyond 48 hours provides any benefit compared to placebo or no treatment.

Summary:

  • Nifedipine, a common maintenance tocolysis treatment, was compared against placebo or no treatment in five randomized studies and two meta-analyses.
  • Results indicate that maintenance tocolysis with calcium channel blockers does not reduce the incidence of preterm birth.
  • Extended tocolytic treatment beyond the initial 48 hours shows no improvement in perinatal outcomes (Level of Evidence 1).

Impact:

  • Findings challenge current clinical practices regarding the prolonged use of tocolytic agents.
  • This evidence suggests that maintenance tocolysis may not be a beneficial strategy for managing preterm labor.
  • Recommendations for clinical guidelines on preterm birth management may need revision based on these results.