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Analgesics in the Pre-hospital Setting: Implications on Hemorrhage Tolerance - Ketamine

29. oktober 2021 opdateret af: Craig Crandall, University of Texas Southwestern Medical Center
The purpose of this project is to test how ketamine, an analgesics currently employed in the pre-hospital setting by the US Army, alters the capacity to tolerate a hemorrhagic insult in humans.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Pain management on the battlefield is critical for the wellbeing of the soldier. Given that a hemorrhagic injury on the battlefield is virtually always associated with pain, it is paramount that the selected pain medication does not disrupt appropriate physiological mechanisms that are beneficial towards the maintenance of blood pressure and vital organ blood flow during that hemorrhagic insult. Current guidelines for the selection of pain medications of a hemorrhaging soldier are based upon limited scientific evidence, with the vast majority of supporting studies being conducted on anesthetized animals. Thus, the interaction between hemorrhagic shock and pain medications commonly employed on the battlefield is yet to be determined in the conscious humans.

With this background, we will test the hypothesis that ketamine will impair the capacity for a conscious human to tolerate a hemorrhagic insult.

The obtained data will provide the necessary scientific evidence in humans to support the Committee on Tactical Combat Casualty Care (CoTCCC) guidelines on the analgesic of choice for moderate to severe injuries where the casualty is in hemorrhagic shock. Notably, such data will identify the analgesic that least compromises a human's ability to tolerate a hemorrhagic insult, ultimately providing critical information to the combat medic on which analgesic should be employed for such an injury.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

43

Fase

  • Fase 4

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Forenede Stater
    • Texas
      • Dallas, Texas, Forenede Stater, 75231
        • Texas Health Presbyterian Hospital Dallas

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 45 år (Voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • 18-45 years of age
  • Healthy
  • Non-obese (body mass index less than 30 kg/m2)
  • Body mass greater than or equal to 65 kg

Exclusion Criteria:

  • Subjects not in the defined age range
  • Subjects who have cardiac, respiratory, neurological and/or metabolic illnesses
  • Any known history of renal or hepatic insufficiency/disease
  • Pregnancy or breast feeding
  • Body mass less than 65 kg
  • Current smokers, as well as individuals who regularly smoked within the past 3 years
  • Positive urine drug screen
  • Currently taking pain modifying medication(s)

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Støttende pleje
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Dobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Ketamine
Subjects will receive up to 20 mg Ketamine Hydrochloride while the effects of this drug on tolerance to a hemorrhagic insult will be assessed.
Medicin: Ketamine Hydrochloride
A total of 20 mg of Ketamine Hydrochloride will be administered intravenously
Placebo komparator: Placebo
Subjects will receive placebo while the effects of this drug on tolerance to a hemorrhagic insult will be assessed.
Andet: Placebo
Subjects will receive placebo

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Cumulative Stress Index
Tidsramme: 12 month
Tolerance to a simulated hemorrhagic challenge will be assessed, for both the placebo and ketamine limbs, by causing progressive central hypovolemia via lower-body negative pressure (LBNP). This progressive lower-body negative pressure challenge will be performed until the onset of syncopal symptoms (defined as: profound bradycardia, a precipitous drop in arterial blood pressure and accompanying narrowing of pulse pressure, a sustained systolic blood pressure less than 80 mmHg, and/or subjective symptoms such as light-headedness, sweating, nausea, or dizziness). The primary variable will be the quantification of lower-body negative pressure that is required to cause these symptoms. This quantification will be objectively measured via a cumulative stress index which is calculated as the sum of the product of the LBNP level and the duration of each level, until test termination (i.e., 40 mmHg x 3 min + 50 mmHg x 3 min, etc).
12 month

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Pressure Pain Tolerance
Tidsramme: 12 months
Pain assessments will be conducted using a digital algometer to obtain maximum pain thresholds caused by pressure. This pain assessment technique is conducted by applying the tip of a hand-held digital algometer on the subject's digit. Force is gradually increased and the peak force is recorded when the subject first reports a painful sensation. Removal of the pressure from the algometer immediately relieves the painful sensation and the subject can voluntarily stop the test at any time. This assessment will be performed after the subject has received placebo and ketamine.
12 months

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

University of Texas Southwestern Medical Center

Samarbejdspartnere

United States Department of Defense

Efterforskere

  • Ledende efterforsker: Craig G Crandall, Ph.D., University of Texas Southwestern Medical Center

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. juni 2018

Primær færdiggørelse (Faktiske)

30. juni 2021

Studieafslutning (Faktiske)

30. juni 2021

Datoer for studieregistrering

Først indsendt

1. august 2018

Først indsendt, der opfyldte QC-kriterier

6. august 2018

Først opslået (Faktiske)

8. august 2018

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

26. november 2021

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

29. oktober 2021

Sidst verificeret

1. oktober 2021

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • STU 092017-068

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

produkt fremstillet i og eksporteret fra U.S.A.

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Ketamine Hydrochloride

Søg i lignende forsøg

Sponsorer og samarbejdspartnere

Medicinske tilstande

Narkotikainterventioner

CROs by country

CROs in Moldova

Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

Abonner