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Analgetische Wirksamkeit und geburtshilfliche Auswirkungen von Tramadol, Paracetamol und Placebo bei aktiver Wehentätigkeit (TRAMPA)

2. November 2026 aktualisiert von: Ricardo A Gutierrez Ramirez, MD, MSc, FACOG, Universidad Nacional Autonoma de Honduras

Analgetische Wirksamkeit und geburtshilfliche Auswirkungen von Tramadol, Paracetamol und Placebo bei aktiver Wehentätigkeit: Eine randomisierte doppelblinde kontrollierte Studie

This randomized, double-blind, placebo-controlled trial aims to compare the analgesic efficacy and obstetric effects of tramadol (100 mg IV) versus paracetamol (1 g IV) versus placebo (saline solution) in nulliparous women during active labor. The primary outcome is duration of active labor (minutes). Secondary outcomes include duration of expulsive phase, type of delivery, need for oxytocin augmentation, maternal adverse events (nausea, vomiting, somnolence, hypotension), and neonatal outcomes (Apgar scores at 1 and 5 minutes, NICU admission). The study hypothesizes that tramadol significantly reduces active labor duration compared to paracetamol and placebo, without compromising maternal or neonatal safety. A total of 300 nulliparous women (100 per group) will be enrolled at Hospital Escuela, Tegucigalpa, Honduras.

Studienübersicht

Status

Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

This is a randomized, double-blind, parallel-group, superiority efficacy trial comparing three interventions: tramadol 100 mg IV, paracetamol 1 g IV, and placebo (10 mL 0.9% saline solution) administered at the onset of active labor (cervical dilation ≥4 cm with regular contractions). The study design follows CONSORT guidelines for randomized controlled trials. Randomization will be performed using REDCap's automated randomization module in variable block sizes, ensuring allocation concealment. Double-blinding is maintained: participants, care providers, and outcome assessors are masked to group assignment. The primary endpoint is duration of active labor (minutes from intervention administration to complete cervical dilation). Secondary endpoints include: duration of expulsive phase (minutes), type of delivery (spontaneous vaginal, instrumental, cesarean), need for oxytocin augmentation, maternal adverse events (nausea, vomiting, somnolence, hypotension, pruritus, dizziness), neonatal Apgar scores at 1 and 5 minutes, birth weight, meconium-stained amniotic fluid, NICU admission, and neonatal asphyxia. Data collection includes sociodemographic variables (age, education, marital status, occupation), obstetric variables (gestational age, prenatal care visits, BMI, membrane status, cervical dilation at intervention, baseline fetal heart rate), and pain scores (Visual Analog Scale pre-intervention, 30 min, 1h, 2h post-intervention). Statistical analysis includes ANOVA or Kruskal-Wallis for continuous variables, chi-square for categorical variables, and logistic regression for binary outcomes, with significance set at p<0.05. A Data Safety Monitoring Board will oversee safety every 3 months. The study is funded by Universidad Nacional Autónoma de Honduras and will be conducted at Hospital Escuela, Tegucigalpa, from Feb. 2026 to June 2026.

Studientyp

Interventionell

Einschreibung (Geschätzt)

300

Phase

  • Phase 4

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studienorte

    • Francisco Morazán Department
      • Tegucigalpa, Francisco Morazán Department, Honduras, 11101
        • Rekrutierung
        • Hospital Escuela
        • Kontakt:
        • Hauptermittler:
          • Jessica M. Peña Ordoñez, MD
        • Unterermittler:
          • Jose A. Mendoza Rodriguez, MD
      • Tegucigalpa, Francisco Morazán Department, Honduras, 11101
        • Rekrutierung
        • Instituto Hondureño de Seguridad Social
        • Kontakt:
        • Hauptermittler:
          • Ethel A. Cruz Valdivieso, MD
        • Unterermittler:
          • Raphael Amador Umanzor, MD

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

15 Jahre bis 45 Jahre (Kind, Erwachsene)

Akzeptiert gesunde Freiwillige

Ja

Studienberechtigte Geschlechter

Weiblich

Beschreibung

Inclusion Criteria:

  • Nulliparous pregnant women
  • Age between 15 and 45 years
  • Singleton pregnancy, term (37-41 weeks gestation)
  • Cephalic presentation
  • Active labor defined as cervical dilation ≥4 cm with regular contractions
  • Signed informed consent

Exclusion Criteria:

  • Multiple gestation or high-risk pregnancy (preeclampsia, gestational diabetes, etc.)
  • Known allergy or contraindication to tramadol or paracetamol
  • Recent use (less than 6 hours) of any analgesic medication
  • Previous cesarean section or other uterine surgery
  • Active infection or fever at admission
  • Inability to provide informed consent due to mental or communication conditions
  • Non-cephalic presentation
  • Rupture of membranes >18 hours without labor
  • Participation in another clinical trial within the last 3 months

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Behandlung
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Vervierfachen

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Tramadol Group

Participants receive a single dose of tramadol 100 mg intravenously at the onset of active labor (cervical dilation ≥4 cm with regular contractions).

Tramadol 100 mg administered as a single intravenous dose at the onset of active labor. Tramadol is an atypical opioid analgesic with serotonin and noradrenaline reuptake inhibition properties. The dose is within standard clinical ranges for obstetric analgesia. Administration is performed by trained medical personnel following institutional protocols. Participants are monitored for adverse effects including nausea, vomiting, somnolence, dizziness, and hypotension.

Experimental: Paracetamol Group

Participants receive a single dose of paracetamol 1 g intravenously (slow infusion) at the onset of active labor (cervical dilation ≥4 cm with regular contractions).

Paracetamol 1 g administered as a single intravenous slow infusion at the onset of active labor. Paracetamol is a central analgesic acting through COX-3 inhibition in the central nervous system. It is widely used during pregnancy and labor due to its favorable safety profile. Administration is performed by trained medical personnel following institutional protocols. Participants are monitored for adverse effects including nausea, vomiting, and allergic reactions (rare).

Placebo-Komparator: Placebo Group

Participants receive a single dose of 10 mL 0.9% saline solution intravenously at the onset of active labor (cervical dilation ≥4 cm with regular contractions).

Placebo consisting of 10 mL 0.9% saline solution administered as a single intravenous dose at the onset of active labor. The appearance and administration procedure are identical to the active interventions to maintain blinding. No pharmacological active ingredients are present. Administration is performed by trained medical personnel following institutional protocols.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Duration of Active Labor
Zeitfenster: From intervention administration (at active labor onset) up to 12 hours.

Time in minutes from administration of study intervention (at onset of active labor defined as cervical dilation ≥4 cm with regular contractions) to complete cervical dilation (10 cm) or delivery, whichever occurs first. Measured and recorded by attending obstetric staff using standardized timing protocols.

From intervention administration (at active labor onset) up to 12 hours.

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Duration of Expulsive Phase (Second Stage)
Zeitfenster: During delivery, from complete cervical dilation up to 120 minutes.

Time in minutes from complete cervical dilation (10 cm) to fetal expulsion. Measured and recorded by attending obstetric staff.

During delivery, from complete cervical dilation up to 120 minutes.
Type of Delivery
Zeitfenster: At delivery

Classification of delivery outcome: spontaneous vaginal delivery, instrumental delivery (forceps or vacuum), or cesarean section. Assessed by attending obstetrician.

At delivery
Need for Oxytocin Augmentation
Zeitfenster: During labor (from intervention administration up to 24 hours).

Requirement for additional oxytocin administration to augment uterine contractions during labor. Recorded as yes/no, including dose and timing if applicable.

During labor (from intervention administration up to 24 hours).
Maternal Adverse Events
Zeitfenster: From intervention administration up to 24 hours postpartum.

Occurrence of any adverse events potentially related to the intervention, including: nausea, vomiting, somnolence, dizziness, headache, pruritus, hypotension (systolic BP <90 mmHg), or allergic reactions. Severity graded as mild, moderate, or severe.

From intervention administration up to 24 hours postpartum.
Neonatal Apgar Score at 5 Minutes
Zeitfenster: At 5 minutes after birth.

Apgar score assessed at 5 minutes after birth. Score ranges from 0-10, with higher scores indicating better neonatal condition.

At 5 minutes after birth.
Neonatal Complications
Zeitfenster: From birth up to 48 hours, through hospital discharge.

Occurrence of neonatal complications including: Apgar score <7 at 5 minutes, meconium-stained amniotic fluid, need for neonatal resuscitation, NICU admission, or neonatal asphyxia

From birth up to 48 hours, through hospital discharge.
Pain Scores (Visual Analog Scale)
Zeitfenster: Pre-intervention, and at 30 minutes, 1 hour, and 2 hours post-intervention.

Maternal pain assessed using Visual Analog Scale (VAS) from 0 (no pain) to 10 (worst imaginable pain). Measured at baseline (pre-intervention), 30 minutes, 1 hour, and 2 hours post-intervention.

Pre-intervention, and at 30 minutes, 1 hour, and 2 hours post-intervention.

Andere Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Subgroup Analysis by Maternal Age
Zeitfenster: Throughout study period, average of six months

Comparison of primary and secondary outcomes stratified by maternal age categories (<20 years, 20-35 years, >35 years).

Throughout study period, average of six months

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

15. Februar 2026

Primärer Abschluss (Geschätzt)

30. November 2026

Studienabschluss (Geschätzt)

30. November 2026

Studienanmeldedaten

Zuerst eingereicht

17. Februar 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

24. Februar 2026

Zuerst gepostet (Tatsächlich)

27. Februar 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

5. November 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

2. November 2026

Zuletzt verifiziert

1. Februar 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • PO-UNAH-49-7-2026

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

UNENTSCHIEDEN

Beschreibung des IPD-Plans

Individual participant data (anonymized) will be shared for scientific purposes related to obstetric analgesia and labor management. Only de-identified datasets will be shared with qualified researchers upon reasonable request and with appropriate ethics committee approval. Participants will be informed of data sharing plans during the informed consent process and may opt out.

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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