Central Venous vs Arterial Blood Gas and CO2 Gap in Critically Ill Patients With and Without Diabetes
Correlation Between Central Venous and Arterial Blood Gas Parameters Including CO2 Gap in Diabetic and Non-Diabetic Critically Ill Patients
Frequent monitoring of acid-base status, ventilation, and tissue oxygenation is essential for managing critically ill patients in the intensive care unit (ICU). While arterial blood gas (ABG) analysis is considered the standard method for these evaluations, maintaining arterial catheters carries risks of complications, such as thrombosis, hematoma, and infection. Central venous blood gas (CVBG) analysis offers a safer alternative because central venous catheters are already routinely placed for patient care. Additionally, the venous-to-arterial carbon dioxide difference (CO2 gap) serves as an indicator of systemic blood flow and tissue perfusion.
However, patients with diabetes mellitus often present with underlying microvascular alterations, endothelial changes, and metabolic variations that might alter tissue perfusion and peripheral gas exchange. This study aims to assess the correlation and agreement between central venous and arterial blood gas parameters, as well as evaluate the diagnostic accuracy of the CO2 gap, in diabetic versus non-diabetic critically ill patients.
A total of 100 adult ICU patients (50 diabetic and 50 non-diabetic) with pre-existing central venous and arterial lines will be enrolled. Paired blood samples will be drawn simultaneously to compare blood gas values and calculate the CO2 gap without altering standard clinical treatment.
Studienübersicht
Status
Studientyp
Einschreibung (Geschätzt)
Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Probenahmeverfahren
Studienpopulation
Beschreibung
Inclusion Criteria:
- Adult patients aged 18 years and older
- Critically ill patients admitted to the intensive care unit (ICU)
- Patients with indwelling central venous catheter and arterial line placed for routine clinical management
- Written informed consent obtained from the patient or legal next of kin
Exclusion Criteria:
- Known severe peripheral vascular occlusive disease affecting line placement
- Use of a pulmonary artery catheter (mixed venous blood line) instead of a standard central venous catheter positioned at the superior/inferior vena cava junction
- Refusal of the patient or legal representative to participate in the study
- Patients younger than 18 years of age
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
Kohorten und Interventionen
Gruppe / Kohorte |
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Diabetic Critically Ill Patients
Critically ill adult patients admitted to the intensive care unit who have a confirmed diagnosis of Diabetes Mellitus.
All participants undergo simultaneous paired arterial and central venous blood gas sampling to evaluate agreement and CO2 gap dynamics.
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Non-Diabetic Critically Ill Patients
Critically ill adult patients admitted to the intensive care unit without a history or diagnosis of Diabetes Mellitus.
All participants undergo simultaneous paired arterial and central venous blood gas sampling to evaluate agreement and CO2 gap dynamics.
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Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Venous-to-Arterial Carbon Dioxide Tension Difference (Delta PCO2)
Zeitfenster: Baseline
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Delta PCO2 (CO2 gap) is calculated as central venous PCO2 minus arterial PCO2 (PvCO2 - PaCO2) measured in mmHg.
Paired arterial and central venous blood gas samples are collected simultaneously and analyzed within 10 minutes.
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Baseline
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Mitarbeiter und Ermittler
Sponsor
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Primärer Abschluss (Geschätzt)
Studienabschluss (Geschätzt)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
- CVBG vs ABG in ICU Diabetics
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