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Effects of Calot's Triangle Block for Postoperative Analgesia in Patients Undergoing Laparoscopic Cholecystectomy: a Prospective, Randomized, Double-blind, Controlled, Clinical Trial

24. november 2014 oppdatert av: Min Su, First Affiliated Hospital of Chongqing Medical University
Chronic pain after laparoscopic cholecystectomy (LC) is a common complication with an incidence ranging between 3-56%. In many cases, however, the cause chronic pain after LC remains unknown and visceral hyperalgesia and central sensitization have been suggested to be part of the pathophysiology. So the purpose of this study is to determine whether Calot's Triangle Block (CTB) combined with patient controlled intravenous analgesia (PCIA) is superior to PCIA in reducing the incidence of chronic pain after LC.

Studieoversikt

Detaljert beskrivelse

Laparoscopic cholecystectomy (LC) is currently regarded as the gold standard treatment for symptomatic gallstone disease. Compared with open cholecystectomy, LC benefits include less postoperative pain, reduced analgesic consumption, and earlier discharge. However, besides the advantages mentioned above, there are exist complexity and diversity of the acute pain after LC, which consists of a somatic, a visceral and a referred pain component. Meanwhile, our team also found many LC patients experience visceral pain after surgery. According to epidemic research show that chronic pain after LC is a common complication with an incidence ranging between 3-56%. Several reports have indicated that early postoperative pain has been shown to be a significant risk factor of chronic pain. In many cases, however, the cause chronic pain after LC remains unknown and visceral hyperalgesia and central sensitizationhave been suggested to be part of the pathophysiology. To reduce the incidence of chronic pain after LC, so we conduct the randomized controlled trial to investigate whether calot's triangle block combined with PCIA is superior to PCIA in reducing the incidence of chronic pain after LC.

This study was approved by the institutional review board of the First Affiliated Hospital of Chongqing Medical University. The protocol design is in accordance with Consolidated Standards of Reporting Trials (CONSORT) statement. All potentially eligible participants will be asked to give written informed consent before they are enrolled in this study. This study is a prospective, randomized, double-blind, controlled clinical trial guided by the standard of good clinical practice (GCP), and eligible participants are divided into two groups: group CTB and group PCIA, and primary assess the outcomes of the incidence of chronic pain after LC and the intensity of acute pain after LC.

Participants in group CTB will receive a single injection of ropivacaine in calot's triangle before surgical dissection combined with PCIA post-operatively.

Participants in group PCIA will receive a single injection in calot's triangle with normal saline before surgical dissection and PCIA post-operatively.

The primary outcome of this study is the incidence of chronic pain after LC.

The secondary outcomes of this study are acute post-operative pain, moderate-severe pain, rescue medication and adverse events associated with the post-operative analgesia.

This study will be conducted under the supervision of an independent auditor. Every week, the auditor checked the data of the participants the day after the surgery was conducted. Assessment of pain intensity and prognostic outcomes must be confirmed by the auditor in sample population. When there is disagreement between surgeon and anesthesiologists in evaluating the prognosis of patients, the auditor must solve this disagreement by discussion with evaluators. Data will be double-entered by two statisticians with limitation of access and locked during statistical analysis.

Studietype

Intervensjonell

Registrering (Forventet)

140

Fase

  • Fase 4

Kontakter og plasseringer

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

Studiesteder

    • Chongqing
      • Chongqing, Chongqing, Kina, 400016
        • China,Chongqing The First Affiliated Hospital of Chongqing Medical University

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

18 år til 65 år (Voksen, Eldre voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion Criteria:

  • men or woman over 18 the years and younger than 65 years old who will receive selective laparoscopic cholecystectomy.

Exclusion Criteria:

  • age below 18 years or over 65 years
  • American Society of Anesthesiologists grade III or greater
  • Diabetes
  • chronic pain of any kind other than gallbladder disease
  • allergic to local anesthetics
  • cognitive impairment or communication problems
  • peptic ulcer
  • received opioids、NSAID or tranquilizers (treatment for over 1 wk before the cholecystectomy)
  • history of alcohol or drug abuse
  • the operation was converted to an open procedure
  • gangrenous cholecystitis
  • common bile duct exploration or insertion of a T-drain
  • other invasive procedures
  • severe hepatic or renal impairment
  • post-operative severe complications(e.g. pyogenic infection)

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: Dobbelt

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: CTB group
Participants in this group will receive a single injection for calot's triangle block combined with PCIA post-operatively. CTB will be conducted by bile duct needle and 1.0% 10 ml ropivacaine will be injection in calot's triangle when before surgical dissection.Participants in this group will also receive PCIA after surgery,the regimens of PCIA are included tramadol 800 mg, flurbiprofenaxetil 100 mg with normal saline added up to a volume of 80 ml in total.
CTB: A single injection of 1.0% 10ml ropivacaine by bile duct needle in calot's triangle when before surgical dissection.After surgery,participants in this group will also receive PCIA.
Aktiv komparator: PCIA group
Participants in this group will receive PCIA post-operatively (tramadol 800 mg and flurbiprofen axetil 100mg with normal saline added up to a volume of 80ml in total ) .The PCIA pump was set up with a 5 ml loading dose, a 2 ml bolus dose, a 15 min lockout interval and background infusion at a rate of 1 ml/h.
Formelen til PCIA inkluderte tramadol 800 mg, flurbiprofenaksetil 100 mg med saltvann tilsatt opp til et volum på totalt 80 ml. PCIA-pumpen ble satt opp med en 5 ml startdose, en 2 ml bolusdose, et 15 min lockout-intervall og bakgrunnsinfusjon med en hastighet på 1 ml/t.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Chronic post-surgical pain
Tidsramme: 3 months post-operatively
Chronic post-surgical pain intensity will be measured as more than 3 months by numerical rating scale (NRS) for pain
3 months post-operatively

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Acute pain post-operatively
Tidsramme: 2h,4h,6h,12h,24h, 48h post-operatively
Pain intensity will be measured by visual analogue scale(VAS)
2h,4h,6h,12h,24h, 48h post-operatively
Analgesic Rescue
Tidsramme: from 2h to 48h post-operatively
The dosages of opioid or non-opioid analgesic rescue medications
from 2h to 48h post-operatively
Adverse events associated with post-operative analgesia
Tidsramme: from 2h to 48h post-operatively
incomplete analgesia; nausea and vomiting; respiratory depression; over-sedation
from 2h to 48h post-operatively
moderate-severe pain
Tidsramme: 3,6months postoperatively
Pain intensity will be measured by numerical rating scale (NRS)
3,6months postoperatively
chronic post-surgical pain
Tidsramme: 6months postoperatively
chronic post-surgical pain intensity will be measured by numerical rating scale (NRS) for pain
6months postoperatively

Samarbeidspartnere og etterforskere

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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

1. desember 2014

Primær fullføring (Forventet)

1. august 2015

Studiet fullført (Forventet)

1. november 2015

Datoer for studieregistrering

Først innsendt

19. november 2014

Først innsendt som oppfylte QC-kriteriene

21. november 2014

Først lagt ut (Anslag)

25. november 2014

Oppdateringer av studieposter

Sist oppdatering lagt ut (Anslag)

26. november 2014

Siste oppdatering sendt inn som oppfylte QC-kriteriene

24. november 2014

Sist bekreftet

1. november 2014

Mer informasjon

Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .

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