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Microcirculation in muscle.

E Eriksson1, G Germann, A Mathur

  • 1Division of Plastic and Reconstructive Surgery, Southern Illinois University School of Medicine, Springfield 62708.

Annals of Plastic Surgery
|July 1, 1986
PubMed
Summary
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This review details muscle microvascular architecture, noting extensive arterioarterial and venovenous networks. Findings suggest plasma expanders are more effective than vasodilators in low-flow conditions.

Area of Science:

  • Physiology
  • Microcirculation Research
  • Vascular Biology

Background:

  • Muscle microvascular architecture is crucial for blood supply and nutrient exchange.
  • Understanding the network's structure informs therapeutic strategies for low-flow states.

Purpose of the Study:

  • To review the intrinsic microvascular architecture of skeletal muscle.
  • To analyze the structural components and their functional implications.

Main Methods:

  • Review of existing literature on muscle microvasculature.
  • Analysis of vessel diameters, smooth muscle cell layers, and anastomoses.
  • Calculation of cross-sectional area and resistance in different vessel types.

Main Results:

Related Experiment Videos

  • Muscles share similar intrinsic vasculature with extensive arterioarterial and venovenous anastomoses.
  • End-arterioles, end-venules, and capillaries form a distinct network; no arteriovenous shunts exist.
  • Arterioles and venules of specific diameters (22 and 40 microns, respectively) exhibit the greatest resistance.

Conclusions:

  • Plasma expanders like dextran are physiologically better supported than vasodilators for low-flow situations in muscle.
  • The absence of precapillary sphincters and presence of smooth muscle in postcapillary vessels influence vascular regulation.
  • Detailed knowledge of microvascular architecture aids in understanding and managing conditions affecting muscle blood flow.