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Microvascular changes during anesthesia: sevoflurane compared with propofol.

D Bruegger¹, A Bauer, U Finsterer

¹Clinic for Anesthesiology, Ludwig Maximilians University Munich, Germany.

Acta Anaesthesiologica Scandinavica

|May 25, 2002

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See all related articles

Sevoflurane anesthesia reduced capillary filtration, potentially lowering fluid needs during surgery. Propofol did not affect this microvascular parameter, suggesting sevoflurane may be preferred for patients prone to fluid shifts.

Area of Science:

Anesthesiology
Vascular Physiology
Surgical Care

Background:

Developed a non-invasive computer-assisted venous congestion plethysmograph to assess lower limb microvascular parameters.
Enabled evaluation of microvascular changes after sevoflurane or propofol anesthesia induction.

Purpose of the Study:

To compare the effects of sevoflurane and propofol anesthesia on microvascular parameters.
To assess changes in capillary filtration coefficient (CFC) and isovolumetric venous pressure (Pvi) during and after anesthesia.

Main Methods:

Prospective randomized trial in 20 female patients undergoing breast surgery.
Measured CFC, Pvi, and limb blood flow preoperatively, immediately post-anesthesia, and on postoperative days 1 and 2.
Anesthesia maintained with sevoflurane/remifentanil or propofol/remifentanil.

Related Experiment Videos

Main Results:

Sevoflurane significantly decreased CFC (3.7 to 2.9 CFCU), while propofol did not alter it.
Both anesthetics significantly reduced Pvi during steady-state anesthesia.
Perioperative fluid substitution positively correlated with CFC changes (r=0.64, P<0.01).

Conclusions:

Decreased CFC with sevoflurane may reduce interstitial fluid extravasation and intraoperative fluid requirements.
Sevoflurane may be the preferred anesthetic for patients susceptible to large intraoperative fluid shifts.
Microvascular assessment provides insights into anesthetic effects on fluid balance.