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Evaluating abdominal oedema during experimental sepsis using an isotope technique
Marco Lattuada1, Enn Maripuu, Carl Hard af Segerstad
1Hedenstierna Laboratory, Department of Medical Sciences, Uppsala University, Uppsala, Sweden.
Clinical Physiology and Functional Imaging
|April 11, 2012
Summary
A modified double-isotope technique effectively measures abdominal edema in piglets during sepsis. This method tracks fluid extravasation, aiding in understanding and managing sepsis-related fluid shifts.
Area of Science:
- Biomedical imaging
- Physiology
- Sepsis research
Background:
- Abdominal edema is a common complication in sepsis.
- Effective fluid management is critical for sepsis patients.
- Studying abdominal edema can inform fluid resuscitation strategies.
Purpose of the Study:
- To modify and validate a double-isotope technique for evaluating abdominal organ edema and fluid extravasation.
- To assess the utility of this technique in a preclinical model of sepsis.
- To correlate edema formation with physiological parameters.
Main Methods:
- A modified double-isotope technique using Technetium-99m labeled red blood cells and Indium-111 labeled Transferrin was employed in 24 piglets.
- Abdominal organ edema and fluid extravasation were imaged using a dual-head gamma camera.
- Microscopic analysis of tissue biopsies was performed for comparative validation.
Main Results:
- Transferrin extravasation, indicating edema, was significantly higher (4.06 times) in lipopolysaccharide (LPS)-exposed piglets compared to controls.
- Abdominal free fluid showed high Indium-111 activity, distinct from Technetium-99m.
- Edema formation correlated with intestinal lymphatic vessel size and intra-abdominal pressure.
Conclusions:
- The developed double-isotope technique allows for continuous monitoring of abdominal edema formation.
- This method shows promise as a valuable tool in experimental sepsis research.
- The technique has potential for future clinical application in managing sepsis patients.
