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AVO I DA B L E FAC TO R S T H AT COMPOUND THE RESPONSE TO ) , thus AVO I DA B L E FAC TO R S T H AT COMPOUND THE RESPONSE TO ) , thus

AVO I DA B L E FAC TO R S T H AT COMPOUND THE RESPONSE TO ) , thus

Agonists and antagonists: an uncertain balance Within hours of the upregulation of proinflammatory cyto kines, endogenous cytokine antagonists enter the circulation (e.g. interleukin-1 receptor antagonist [IL-1Ra] and TNF- soluble receptors [TNF-sR-55 and 75]...

Alterations in hepatic protein metabolism: the acute-phase protein response The liver and skeletal muscle together account for >50% of daily body protein turnover. Skeletal muscle has a large mass but a low turnover rate (1–2% per day), whereas the liver has a...

Alterations in hepatic protein metabolism: the acute-phase protein response The liver and skeletal muscle together account for >50% of daily body protein turnover. Skeletal muscle has a large mass but a low turnover rate (1–2% per day), whereas the liver has a...

Alterations in skeletal muscle protein metabolism Muscle protein is continually synthesised and broken down with a turnover rate in humans of 1–2% per day . Under normal circumstances, synthesis equals breakdown and muscle bulk remains constant. Physiological...

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CHANGES IN BODY COMPOSITION FOLLOWING INJURY The average 70 /uni00A0 kg male can be considered to consist of fat (13 /uni00A0 kg) and fat-free mass (or lean body mass: 57 /uni00A0 kg). In such an individual, the lean tissue is composed primarily of protein (...

ENHANCED RECOVERY AFTER SURGERY Modern understanding of the metabolic response to surgical injury and the mediators involved has led to a complete reappraisal of traditional perioperative care and the process known as ERAS. ERAS is evidence based on the stro...

FURTHER READING Ahl R, Matthiessen P , Sjölin G et al . E ff ects of betablocker therapy on mor - tality after elective colon cancer surgery: a Swedish nationwide cohort study . BMJ Open 2020; 10 : e036164. Bortolotti P , Faure E, Kipnis E. Inflammasomes in tiss...

Homeostasis Homeostasis is the concept of maintaining a constant internal environment that allows cellular processes to function optimally . Many aspects of surgery , trauma and injury a ff ect homeostasis and can lead to organ dysfunction. Traditionally the ...

Hypothermia Hypothermia results in increased production of adrenal steroids and catecholamines. When compared with normothermic controls, even mild hypothermia results in a two- to threefold increase in postoperative cardiac arrhythmias and increased cataboli...

INJURY There are several factors that prolong the acute-phase response to injury ( Table 1.1 ) and keep the patient in a - catabolic state. Other factors can exacerbate or compound the metabolic stress response both in elective surgery and in the emergency set...

Immobilisation Adreno-sympathetic activation Wound Hypothermia Hypotension Pain Cytokine cascade release Immobilisation Adreno-sympathetic activation Wound Hypothermia Hypotension Pain Cytokine cascade release Immobilisation Adreno-sympathetic activation Wound...

Immobility Immobility has long been recognised as a potent stimulus for inducing muscle wasting. Inactivity impairs the normal meal-derived amino acid stimulation of protein synthesis in skeletal muscle. Avoidance of unnecessary bed rest and active early mobil...

INTRODUCTION As surgeons we are inextricably linked with tissue injury and its e ff ects, both from the damage which operating inevitably causes and from the treatment of accidental traumatic injury . The body responds to significant local tissue injury , wheth...

Learning objectives To understand: How the body responds to accidental injury and surgery • Physiological and biochemical changes that occur during • injury and recovery Mediators and pathways of the metabolic response to • injury Learning objectives To unders...

MANAGING THE CATABOLIC STRESS RESPONSE There are several key elements that determine the extent of catabolism and thus govern the metabolic and nutritional care of the surgical patient. It must be remembered that, during the response to injury , not all tissu...