Denne siden ble automatisk oversatt og nøyaktigheten av oversettelsen er ikke garantert. Vennligst referer til engelsk versjon for en kildetekst.

The Effect of Local Anaesthetic Volume on Nerve Block Duration and Nerve Block Duration Variability

20. mars 2017 oppdatert av: Claus Behrend Christiansen, Nordsjaellands Hospital

The Effect of Local Anaesthetic Volume on Nerve Block Duration and Nerve Block Duration Variability. A Randomised, Blinded, Healthy Volunteer Study

The aim is to investigate the effect of perineural administration of a series of different volumes of local anaesthesia (ropivacaine 0.2%) on nerve block duration and the variability of the duration in the common peroneal nerve and the sciatic nerve in healthy volunteers.

The hypothesis is that nerve block duration is correlated to local anaesthetic volume, but only to a certain degree. After a sufficient volume a 'saturation level' will be reached, and nerve block duration will not increase further.

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

The trial is divided into two similar phases. Each phase will focus on a specific nerve. Phase 1 will focus on the common peroneal nerve and Phase 2 will focus on the sciatic nerve.

After baseline measurements, the investigators will insert a peripheral intravenous catheter. Then, the investigators will insert a suture-method peripheral nerve catheter (Certa CatheterTM). Procedures will be done in a sterile manner as a standard of practice. The investigators will use an ultrasound (US)-guided short-axis, needle in-plane technique. For the US-scan, the investigators will use a linear or a curvilinear transducer.

During interventions, volunteers will be monitored with continuous pulse oximetry. Placement of the peripheral nerve catheter will be facilitated by US using small injections of mepivacaine (carbocaine 2 %) in the skin and surrounding tissues and only isotonic saline (5 mL) in the perineural space to prevent blocking of the nerve before ropivacaine injection. The catheter orifice will be placed by pulling either end of the catheter and guided by the built-in echogenic markings seen on US. Before injection of ropivacaine, the investigators will do careful aspirations through the catheter in order to prevent intravasal injection.

Each ropivacaine injection will be administered via an infusion pump. This will ensure a constant infusion rate set to 10 mL per minute. During infusion, the volunteers will be monitored with continuous pulse oximetry.

Before instigation of the ropivacaine infusion, the investigators will use US to verify full absorption of the isotonic saline in the perineural space.

For each nerve, the subject will be randomly allocated to and receive one of five possible ropivacaine volumes. All volunteers and outcome assessors will be blinded to the ropivacaine administrations and infusion procedures. Outcome assessors will not be in the room, when the medication is prepared nor given. Preparation will take place behind a curtain and therefore also blinded to the volunteers.

Studietype

Intervensjonell

Registrering (Faktiske)

120

Fase

  • Fase 4

Kontakter og plasseringer

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

Studiesteder

  • Danmark
      • Hillerød, Danmark, DK-3400
        • Claus Behrend Christiansen

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 64 år (Voksen)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion criteria

  1. Male or female 18-64 years
  2. American Society of Anesthesiologists Classification ≤ II

Exclusion criteria

  1. Body Mass Index ≤ 18 or ≥ 30
  2. Former surgery to the lower extremities
  3. Peripheral nerve disease
  4. Allergy to ropivacaine
  5. Pregnancy or breastfeeding
  6. Enrolment in other investigational drug studies or recent clinical trials that may interfere with this study
  7. Habitual use of any kind of analgesic treatment
  8. Anatomic abnormalities preventing successful US-guided peripheral nerve catheter insertion

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: Trippel

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Aktiv komparator: Peroneal nerve: Ropivacaine 0.2%, 2.5 mL
Perineural injection of ropivacaine 0.2 %, 2,5 mL
Legemiddel: Ropivacaine
Perineural injection.
Aktiv komparator: Peroneal nerve: Ropivacaine 0.2%, 5 mL
Perineural injection of ropivacaine 0.2 %, 5 mL
Legemiddel: Ropivacaine
Perineural injection.
Aktiv komparator: Peroneal nerve: Ropivacaine 0.2%, 10 mL
Perineural injection of ropivacaine 0.2 %, 10 mL
Legemiddel: Ropivacaine
Perineural injection.
Aktiv komparator: Peroneal nerve: Ropivacaine 0.2%, 15 mL
Perineural injection of ropivacaine 0.2 %, 15 mL
Legemiddel: Ropivacaine
Perineural injection.
Aktiv komparator: Peroneal nerve: Ropivacaine 0.2%, 20 mL
Perineural injection of ropivacaine 0.2 %, 20 mL
Legemiddel: Ropivacaine
Perineural injection.
Aktiv komparator: Sciatic nerve: Ropivacaine 0.2%, 5 mL
Perineural injection of ropivacaine 0.2 %, 5 mL
Legemiddel: Ropivacaine
Perineural injection.
Aktiv komparator: Sciatic nerve: Ropivacaine 0.2%, 10 mL
Perineural injection of ropivacaine 0.2 %, 10 mL
Legemiddel: Ropivacaine
Perineural injection.
Aktiv komparator: Sciatic nerve: Ropivacaine 0.2%, 15 mL
Perineural injection of ropivacaine 0.2 %, 15 mL
Legemiddel: Ropivacaine
Perineural injection.
Aktiv komparator: Sciatic nerve: Ropivacaine 0.2%, 20 mL
Perineural injection of ropivacaine 0.2 %, 20 mL
Legemiddel: Ropivacaine
Perineural injection.
Aktiv komparator: Sciatic nerve: Ropivacaine 0.2%, 30 mL
Perineural injection of ropivacaine 0.2 %, 30 mL
Legemiddel: Ropivacaine
Perineural injection.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Duration of sensory nerve block
Tidsramme: 1-24 hours
Application of a round, cooled glass container in the sensory distribution area of the tested nerve: The lateral part of the lower leg for the common peroneal nerve and beneath the foot for the tibial nerve. Testing will start after onset of sensory nerve block and continue until normal sensation has returned. When testing the sciatic nerve, we will continue testing until normal sensation has returned in both components of the nerve, i.e. the tibial and common peroneal nerve.
1-24 hours

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Length of nerve exposed to local anaesthesia
Tidsramme: 10 minutes
We will measure local anaesthetic spread in a proximal-to-distal manner parallel to the nerve trajectory. Total length of the neural spread will be reported in millimetres from the most proximal point to the most distal point in which fluid, i.e. ropivacaine, is seen on ultrasound in proximity to the nerve. Testing will be done immediately after end of ropivacaine infusion.
10 minutes
Onset of sensory nerve block
Tidsramme: 10-180 minutes
Application of a round, cooled glass container in the sensory distribution area of the tested nerve: The lateral part of the lower leg for the common peroneal nerve and beneath the foot for the tibial nerve. Testing will start ten minutes after end of infusion and continue for every fifth minute until onset. We will test for a maximum of 180 minutes.
10-180 minutes
Onset of motor nerve block
Tidsramme: 10-180 minutes
Testing will start ten minutes after end of infusion and continue for every fifth minute until onset. When onset of sensory nerve block is confirmed, testing of motor nerve block onset will end as well, if not already found. Motor nerve block of the tibial nerve will be evaluated by plantarflexion of the ankle. Motor nerve block of the common peroneal nerve will be tested by dorsiflexion of the ankle.
10-180 minutes
Degree of sensory nerve block
Tidsramme: 1-24 hours
We will test sensory nerve block using a subjective rating scale. We will grade from one to four: 1) "not different from ipsilateral antebrachium"; 2) "different from ipsilateral antebrachium"; 3) "warm sensation"; 4) "no sensation". Grades 2-4 will be considered as successful sensory nerve blocks. It will be noted if the volunteer is in doubt. Nevertheless, this will be considered as a successful sensory nerve block and graded as 2) in the post hoc statistical analyses.
1-24 hours
Degree of motor nerve block
Tidsramme: 1-24 hours
This will be tested with the volunteer in the upright position using a sturdy counter for balance if necessary. Motor strength will be evaluated using a normal everyday activation of the lower leg: A toe and a heel raise, testing the common peroneal nerve via activation of the anterior tibial muscle and the tibial nerve via activation of the gastrocnemius muscle, respectively. Motor nerve block intensity will be evaluated on a scale from one to three: 1) normal strength, 2) paresis or 3) paralysis. Volunteers will be asked to perform a maximum contraction building up muscle force over three seconds. It will be noted if the volunteer is in doubt, which will be considered as 2) paresis in the post hoc statistical analyses.
1-24 hours

Samarbeidspartnere og etterforskere

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

Sponsor

Nordsjaellands Hospital

Samarbeidspartnere

Innovation Fund Denmark

Etterforskere

  • Studieleder: Kai Henrik Wiborg Lange, MD DMSC, Nordsjællands Hospital Hillerød

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. juli 2016

Primær fullføring (Faktiske)

20. mars 2017

Studiet fullført (Faktiske)

20. mars 2017

Datoer for studieregistrering

Først innsendt

8. juli 2016

Først innsendt som oppfylte QC-kriteriene

8. juli 2016

Først lagt ut (Anslag)

12. juli 2016

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

22. mars 2017

Siste oppdatering sendt inn som oppfylte QC-kriteriene

20. mars 2017

Sist bekreftet

1. mars 2017

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • H-16000184

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

JA

IPD-planbeskrivelse

We will attach relevant data sheets to all our scientific submissions.

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. .

Kliniske studier på Postoperativ smerte

Kliniske studier på Ropivacaine

Søk i lignende forsøk

Sponsorer og samarbeidspartnere

Medisinsk tilstand

Legemiddelintervensjoner

CROs by country

CROs in Nigeria

Forhold

Sjeldne sykdommer

Legemiddelintervensjoner

Kosttilskudd

Sponsor / samarbeidspartnere

Steder

Abonnere