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Evaluering af syre-base-forstyrrelser og ventilationsindstillinger hos patienter med kardiogent shock og efter hjertestop: Sammenligning med VentilO-algoritmen (VentilO CU)

3. november 2026 opdateret af: François Lellouche, Laval University

Evaluering af syre-base-forstyrrelser og ventilationsindstillinger ved kardiogen shock og patienter efter hjertestop: Sammenligning med VentilO-algoritmen

This study aims to better understand how mechanical ventilation settings affect patients admitted to the coronary care unit after cardiac arrest or with cardiogenic shock. These patients often require mechanical ventilation, but current guidelines provide limited evidence on the best approach. Improper ventilation settings can lead to acid-base imbalances, such as respiratory acidosis or alkalosis, which may worsen patient outcomes.

The retrospective analysis will include 100 adult patients (50 post-cardiac arrest and 50 with cardiogenic shock) who were mechanically ventilated upon admission. The study has two main objectives:

Determine how often acid-base disorders occur in these patients and describe their characteristics.

Compare the initial ventilator settings chosen by clinicians with those suggested by VentilO, a decision-support algorithm.

The investigators will evaluate the potential effect of the VentilO recommendations on the first arterial (or capillary) blood gases compared to the real settings.

This information will help refine the algorithm and guide future research on improving ventilation strategies for critically ill cardiac patients.

Participation does not involve any intervention, as the study uses existing medical records.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Undersøgelsestype

Observationel

Tilmelding (Anslået)

100

Kontakter og lokationer

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

Studiekontakt

Studiesteder

    • Quebec
      • Québec, Quebec, Canada, G1V4G5
        • Rekruttering
        • Insitut universitaire de cardiologie et de pneumologie de Quebec - Universite Laval
        • Kontakt:

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

  • Barn
  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

post cardiac arrest or cardiogenic shock

Beskrivelse

Inclusion Criteria:

  • Adult (Age >=18 years old)
  • Under mechanical ventilation with endotracheal tube for :

post cardiac arrest or cardiogenic shock

- Bood gases result availability up to 4 hours after coronary unit admission

Exclusion Criteria:

  • Lack of patient anthropometric data (height and weight) available in the patient record
  • No information in the record regarding the data on the humidification systems used at the time of the first blood gas test upon admission to the coronary care unit.
  • Patient stabilzed in other hospital before coronary unit admission or adjustment of respiratory parameters after a blood gas test.

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Observationsmodeller: COHORT
  • Tidsperspektiver: RETROSPECTIVE

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
Patient efter hjertestop

Blood gases evaluation after initiation of mechanical ventilation

Patient med kardiogen shock

Blood gases evaluation after initiation of mechanical ventilation

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Acid-base disorder (respiratory acidosis)
Tidsramme: Up to 4 hours after admission to the coronary care unit - First blood gas sample

Presence of respiratory acisosis define by pH< 7.35 and PaCO2 > 45 mmHg

Up to 4 hours after admission to the coronary care unit - First blood gas sample
Acid-base disorder (respiratory alcalosis)
Tidsramme: Up to 4 hours after admission to the coronary care unit - First blood gas sample

Presence of respiratory alcalosis define by by pH>7.45 and PaCO2 < 35 mmHg

Up to 4 hours after admission to the coronary care unit - First blood gas sample

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Ventilator setting (Respiratory rate)
Tidsramme: Up to 4 hour after coronary unit admission - At the last ventilator setting before blood gas sample

Respiratory rate set by the doctor, these setting will be compared to the suggestion of the algorithm

Up to 4 hour after coronary unit admission - At the last ventilator setting before blood gas sample
Ventilator setting (Tidal volume)
Tidsramme: Up to 4 hour after coronary unit admission - At the last ventilator setting before blood gas sample

Tidal volume set by the doctor, these setting will be compared to the suggestion of the algorithm

Up to 4 hour after coronary unit admission - At the last ventilator setting before blood gas sample
Acid-base disorder (metabolic acidosis)
Tidsramme: Up to 4 hours after admission to the coronary care unit - First blood gas sample

Presence of metabolic acidosis define by HCO3 < 20 mmol/L

Up to 4 hours after admission to the coronary care unit - First blood gas sample
Acid-base disorder (metabolic alcalosis)
Tidsramme: Up to 4 hours after admission to the coronary care unit - First blood gas sample

Presence of metabolic acidosis define by HCO3 > 28 mmol/L

Up to 4 hours after admission to the coronary care unit - First blood gas sample
Optimal acid-base result
Tidsramme: Up to 4 hours after admission to the coronary care unit - First blood gas sample

Presence of optimal pH (7.35-7.45) with optimal PCO2 (35-45 mmHg)

Up to 4 hours after admission to the coronary care unit - First blood gas sample
Mechanical ventilation duration
Tidsramme: Up to 90 days

Time spent with invasive mechanical ventilation aftercoronary unit admission and hospital discharge

Up to 90 days
Vasopressor duration
Tidsramme: Day 28

Duration of vasopressor or inotrop administration

Day 28
Hospital length of stay
Tidsramme: Up to 90 days

Coronary unit admission through hospital discharge

Up to 90 days
Mortality
Tidsramme: Day 28

Mortality at coronary unit

Day 28
Acute renal failure
Tidsramme: Up to 90 days. Coronary unit stay - admission through discharge or until death if occured

Rate of acute renal failure during coronary unit length of stay. Renal failure will be defined according to the usual criteria, i.e., an increase of >27 mmol/L creatinine in 48 hours or 1.5x over the baseline

Up to 90 days. Coronary unit stay - admission through discharge or until death if occured

Samarbejdspartnere og efterforskere

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

Sponsor

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)

9. juni 2026

Primær færdiggørelse (Anslået)

1. juni 2027

Studieafslutning (Anslået)

1. december 2027

Datoer for studieregistrering

Først indsendt

5. marts 2026

Først indsendt, der opfyldte QC-kriterier

18. marts 2026

Først opslået (Faktiske)

20. marts 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

5. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

3. november 2026

Sidst verificeret

1. marts 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 2026-4504

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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