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Analgetisk effekt og fødselsrelaterte effekter av tramadol, paracetamol og placebo under aktiv fødsel (TRAMPA)

2. november 2026 oppdatert av: Ricardo A Gutierrez Ramirez, MD, MSc, FACOG, Universidad Nacional Autonoma de Honduras

Analgetisk effekt og obstetriske effekter av Tramadol, Paracetamol og Placebo i aktiv fødsel: En randomisert dobbeltblind kontrollert 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.

Studieoversikt

Status

Rekruttering

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

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.

Studietype

Intervensjonell

Registrering (Antatt)

300

Fase

  • Fase 4

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studiesteder

  • Honduras
    • Francisco Morazán Department
      • Tegucigalpa, Francisco Morazán Department, Honduras, 11101
        • Rekruttering
        • Hospital Escuela
        • Ta kontakt med:
        • Hovedetterforsker:
          • Jessica M. Peña Ordoñez, MD
        • Underetterforsker:
          • Jose A. Mendoza Rodriguez, MD
      • Tegucigalpa, Francisco Morazán Department, Honduras, 11101
        • Rekruttering
        • Instituto Hondureño de Seguridad Social
        • Ta kontakt med:
        • Hovedetterforsker:
          • Ethel A. Cruz Valdivieso, MD
        • Underetterforsker:
          • Raphael Amador Umanzor, MD

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

15 år til 45 år (Barn, Voksen)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

Hunn

Beskrivelse

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

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Firemannsrom

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: 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).
Legemiddel: Tramadol Hydrochloride

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.
Eksperimentell: 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).
Legemiddel: Paracetamol (acetaminophen)

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).
Legemiddel: Placebo (Saline Solution)

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.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Duration of Active Labor
Tidsramme: 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.

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Duration of Expulsive Phase (Second Stage)
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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)
Tidsramme: 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.

Andre resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Subgroup Analysis by Maternal Age
Tidsramme: 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

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Universidad Nacional Autonoma de Honduras

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Generelle publikasjoner

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

15. februar 2026

Primær fullføring (Antatt)

30. november 2026

Studiet fullført (Antatt)

30. november 2026

Datoer for studieregistrering

Først innsendt

17. februar 2026

Først innsendt som oppfylte QC-kriteriene

24. februar 2026

Først lagt ut (Faktiske)

27. februar 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

5. november 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

2. november 2026

Sist bekreftet

1. februar 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • PO-UNAH-49-7-2026

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

UBESLUTTE

IPD-planbeskrivelse

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.

Legemiddel- og utstyrsinformasjon, studiedokumenter

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Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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