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Related Concept Videos

General External Flow Characteristics01:26

General External Flow Characteristics

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The study of external flow is essential for creating structures and objects that interact efficiently and safely with moving fluids, such as air or water. When a body is immersed in a flowing fluid, it experiences two primary forces: drag, which opposes motion along the flow direction, and lift, which acts perpendicular to the flow. The shape, size, and orientation of the object influence these forces.Streamlined and Blunt Bodies in External FlowObjects in fluid flow are classified as...
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Omental Flow-Through Flap: Experimental Hemodynamic Study.

Nicla Settembre1, Sergueï Malikov1

  • 1Department of Vascular and Endovascular Surgery, Nancy University Hospital, Vandoeuvre les Nancy, France; INSERM 1116, University of Lorraine, Nancy, France; School of Surgery, University of Lorraine, Nancy, France; Experimental Interventional Imaging Laboratory, Aix-Marseille University, Marseilles, France.

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The omental flow-through flap (OFTF) is a low-resistance flap that increases blood flow without causing a steal phenomenon. This technique is feasible for limb revascularization and tissue coverage.

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Area of Science:

  • Vascular Surgery
  • Surgical Innovation
  • Hemodynamics

Background:

  • The omental flow-through flap (OFTF) utilizes the right gastro-omental artery and greater omentum.
  • The greater omentum is recognized for infection resistance, use in ischemic lesions, and high-flow capacity.
  • Previous hypotheses debated the hemodynamic behavior of distal bypasses with flaps.

Purpose of the Study:

  • To evaluate the hemodynamic effects of the omental flow-through flap (OFTF).
  • To test the assumption that OFTF is a low peripheral resistance flap.
  • To determine if the greater omentum induces a steal phenomenon.

Main Methods:

  • Anatomical feasibility was assessed through dissection in four porcine cadavers.
  • Hemodynamic measurements were performed on eight live pigs using periarterial ultrasonic flow transducers.
  • Blood flow was measured before and after OFTF transplantation, including during flap clamping and unclamping.

Main Results:

  • The omental flow-through flap (OFTF) was demonstrated as feasible in the porcine model.
  • A 56.15% increase in distal bypass flow was observed post-flap implantation.
  • Peripheral resistances decreased, indicating a low-resistance characteristic of the flap.

Conclusions:

  • The omental flow-through flap (OFTF) functions as a low-resistance flap.
  • The greater omentum, when used as an OFTF, does not appear to induce a steal phenomenon.
  • This flap offers potential for simultaneous limb revascularization and tissue defect coverage.