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Enhancement of perioperative tissue perfusion as a therapeutic strategy for major surgery
1Department of Anaesthesia, St. George's Hospital, London, UK.
Abstract:
Multiple organ dysfunction syndrome (MODS) accounts for most surgical deaths which occur some days postoperatively. Current hypotheses concerning the pathophysiology of MODS place tissue hypoxia and reperfusion as a central feature of the initiation and continuation of the syndrome. Surgical patients are at risk of developing overt and covert tissue hypoxia and hypoperfusion due to anesthetic, surgical, and other factors; and it is known that surgical patients with poor cardiovascular reserve have a worse outcome postoperatively. A number of clinical studies have attempted to intervene early in surgical patients to prophylactically improve tissue perfusion in the perioperative period by augmentation of cardiac output. These studies demonstrate a reduction in mortality and morbidity in these groups of patients. A similar approach has been tried in other groups of critically ill patients, at a later state in the evolution of their illness; these studies have not shown any improvement in outcome. In surgical patients, data show that those with more coexisting pathology and worse cardiac function may benefit most from a treatment approach aimed at improving tissue perfusion; furthermore, this may result in cost savings. The implications for the management of the higher risk surgical patient are obvious. It may no longer be acceptable to undertake surgery in these patients without facilities to monitor and improve cardiac output and tissue perfusion.
Insights
Optimizing cardiac output in surgical patients may reduce deaths from multiple organ dysfunction syndrome (MODS). Early intervention to improve tissue perfusion benefits high-risk patients, potentially lowering mortality and healthcare costs.
Area of Science:
- Critical Care Medicine
- Surgical Outcomes
- Pathophysiology
Background:
- Multiple organ dysfunction syndrome (MODS) is a leading cause of surgical mortality, often linked to tissue hypoxia and reperfusion injury.
- Surgical patients, especially those with compromised cardiovascular reserve, are susceptible to tissue hypoxia and hypoperfusion.
- Existing research suggests a link between poor cardiovascular function and adverse postoperative outcomes.
Purpose of the Study:
- To investigate the impact of perioperative cardiac output augmentation on outcomes in surgical patients.
- To determine if early interventions aimed at improving tissue perfusion can reduce mortality and morbidity.
- To identify patient subgroups who may benefit most from enhanced hemodynamic management.
Main Methods:
- Review of clinical studies involving perioperative interventions to augment cardiac output in surgical patients.
- Analysis of outcomes in critically ill patients receiving similar interventions at later stages of illness.
- Examination of data correlating pre-existing conditions and cardiac function with treatment response.
Main Results:
- Early perioperative interventions to improve tissue perfusion in surgical patients have shown reductions in mortality and morbidity.
- Similar interventions in non-surgical critically ill patients, applied later in their illness, did not demonstrate improved outcomes.
- Surgical patients with significant comorbidities and impaired cardiac function appear to benefit most from improved tissue perfusion strategies.
Conclusions:
- Prophylactic augmentation of cardiac output and tissue perfusion in the perioperative period is crucial for high-risk surgical patients.
- These interventions may lead to significant reductions in mortality, morbidity, and potentially healthcare costs.
- Management of high-risk surgical patients should incorporate monitoring and optimization of cardiac output and tissue perfusion.
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