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Related Experiment Videos

Differentiation between septic and postburn insulin resistance.

R E Shangraw1, F Jahoor, H Miyoshi

  • 1Metabolism Unit, Shriners Burns Institute, Galveston, TX 77550.

Metabolism: Clinical and Experimental
|October 1, 1989
PubMed
Summary

Sepsis and severe burn injury both cause insulin resistance, but differ significantly. Sepsis impairs glucose uptake, while burn injury does not, though both increase potassium uptake.

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Area of Science:

  • Endocrinology
  • Metabolic Disorders
  • Critical Care Medicine

Background:

  • Sepsis and severe burn injury are known to induce insulin resistance.
  • The precise nature and comparability of insulin resistance in these distinct critical illnesses remain unclear.
  • Understanding these differences is crucial for effective clinical management.

Purpose of the Study:

  • To investigate and compare the maximal biological effectiveness of insulin in patients with sepsis versus those with severe burn injury.
  • To determine if insulin resistance in sepsis and burn injury affects glucose and potassium metabolism differently.
  • To elucidate the specific mechanisms of insulin resistance in these conditions.

Main Methods:

  • Utilized the hyperinsulinemic euglycemic clamp technique to assess insulin sensitivity.

Related Experiment Videos

  • Studied eight septic patients and eight nonseptic patients recovering from severe burn injury.
  • Included comparisons with healthy, bed-rested control subjects.

    • Main Results:

    • Septic patients exhibited significantly higher insulin-induced potassium clearance (183% increase) and lower glucose clearance (52% decrease) compared to controls.
    • Nonseptic burn patients showed increased potassium clearance (91% increase) but normal glucose uptake compared to controls.
    • Septic patients demonstrated significantly lower glucose uptake (47% decrease) than nonseptic burn patients, despite similar potassium responses.

    Conclusions:

    • Septic and postburn insulin resistance are distinct conditions.
    • Peripheral glucose uptake is refractory to insulin stimulation in sepsis but not in burn injury.
    • Insulin remains effective in stimulating potassium uptake in both sepsis and burn injury states.