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Association of Arterio-Venous Oxygen and Carbon Dioxide Gradients With Tissue Hypoperfusion and Mortality in Sepsis

2026年7月14日更新者：Gaziosmanpasa Research and Education Hospital

In patients with sepsis who are treated in the intensive care unit under invasive mechanical ventilation, the combined evaluation of ScvO₂ and PcvCO₂ may provide a comprehensive insight into tissue oxygenation and metabolic stress, allowing a more precise hemodynamic assessment in critically ill patients. The aim of this study is to evaluate the monitoring of ScvO₂, PcvCO₂, and EtCO₂ in intensive care patients in order to predict hemodynamic instability, 28-day mortality, and length of ICU stay, as well as to investigate their effects on cardiac output, tissue oxygenation, and hypoperfusion.

研究概览

地位

完全的

条件

详细说明

In intubated patients admitted to the intensive care unit due to sepsis and receiving inotropic support, placement of a central venous catheter and blood gas analysis, as well as radial artery cannulation for invasive hemodynamic monitoring, are routinely performed. In these patients, ScvO₂ and ScvCO₂ measurements are obtained via the central venous catheter. End-tidal CO₂ (EtCO₂) is measured using capnography. Arterial blood gas analysis, including SaO₂ and PaCO₂, is performed through the radial arterial catheter. Data recorded at admission and at 6, 12, and 24 hours will be evaluated. Additional hemodynamic parameters, including heart rate, blood pressure, arterial blood gas values (pH, PaCO₂, HCO₃-), serum lactate levels, and cardiac output, will also be analyzed. Finger-tip perfusion index is measured using a pulse oximetry probe. Outcomes such as duration of mechanical ventilation, length of ICU stay, and 28-day mortality and morbidity will be assessed in conjunction with APACHE II and SOFA scores.

研究类型

观察性的

注册 (实际的)

联系人和位置

本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。

学习地点

土耳其（türkiye）
- Gaziosmanpasa
  - Istanbul、Gaziosmanpasa、土耳其（türkiye）、34255
    - Gaziosmanpasa Training and Research Hospital

参与标准

研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

成人
年长者

接受健康志愿者

不

取样方法

非概率样本

研究人群

İntubated icu patients who diagnosed with sepsis

描述

Inclusion Criteria:

Adult patients aged 18 years or older
Diagnosis of sepsis
Admission to the intensive care unit
Intubated and receiving invasive mechanical ventilation
Presence of a central venous catheter

Exclusion Criteria:

Patients younger than 18 years
Patients in whom a central venous catheter cannot be placed
Patients receiving oxygen therapy via face mask or nasal cannula
Patients treated with non-invasive mechanical ventilation

学习计划

本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。

研究是如何设计的？

设计细节

研究衡量的是什么？

主要结果指标

结果测量	措施说明	大体时间
Correlation of the central venous-arterial carbon dioxide difference with 28-day mortality 大体时间：from march 2025 to january 2026	The primary outcome of this study is to evaluate the correlation between the central venous-arterial carbon dioxide difference and mortality in patients with sepsis admitted to the intensive care unit. The central venous-arterial carbon dioxide difference will be calculated using paired central venous and arterial blood gas samples obtained at predefined time points (at admission and at 6, 12, and 24 hours). Mortality will be assessed as 28-day all-cause mortality. The correlation between the carbon dioxide difference and mortality will be analyzed to determine its potential value as an indicator of mortality	from march 2025 to january 2026

次要结果测量

结果测量	措施说明	大体时间
Predictive accuracy of perfusion parameters and APACHE II score for 28-day mortality 大体时间：february 2025 to january 2026	The predictive accuracy of central venous-to-arterial carbon dioxide difference (Pcv-aCO₂), end-tidal carbon dioxide (EtCO₂), serum lactate concentration, and APACHE II score for 28-day all-cause mortality will be assessed using the area under the receiver operating characteristic curve (AUC-ROC) in patients with sepsis and septic shock. Each parameter will be evaluated separately for its discriminatory ability to predict mortality.	february 2025 to january 2026

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

Gaziosmanpasa Research and Education Hospital

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (实际的)

2025年3月1日

初级完成 (实际的)

2025年9月20日

研究完成 (实际的)

2026年1月13日

研究注册日期

首次提交

2025年12月25日

首先提交符合 QC 标准的

2026年7月14日

首次发布 (实际的)

2026年7月17日

研究记录更新

最后更新发布 (实际的)