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Long-term palmar microcirculation after radial artery harvesting: an observational study

Karsten Knobloch1, Sandra Tomaszek, Artur Lichtenberg

  • 1Thoracic and Cardiovascular Surgery, Medical School Hannover, Hannover, Germany. kknobi@yahoo.com

The Annals of Thoracic Surgery
|April 25, 2006
PubMed

Insights

Radial artery harvesting for coronary artery bypass surgery does not harm hand circulation long-term. Objective measurements show minimal changes in palmar microcirculation, with no impact on daily hand function.

Area of Science:

  • Cardiovascular Surgery
  • Vascular Physiology
  • Microsurgery Assessment

Background:

  • Radial artery harvesting is a common practice for coronary revascularization.
  • Assessing the long-term impact on palmar microcirculation is crucial for patient outcomes.

Purpose of the Study:

  • To evaluate palmar microcirculation in patients long after radial artery harvesting for coronary revascularization.
  • To determine if radial artery harvesting affects superficial and deep tissue oxygen saturation, venous filling pressure, and capillary blood flow.

Main Methods:

  • 114 patients (100 male) underwent coronary revascularization using the radial artery.
  • Laser Doppler spectrophotometry assessed tissue oxygen saturation (SO2), venous filling pressure (rHb), and capillary blood flow/velocity at a mean of 25 months post-surgery.
  • Measurements were taken at various palmar locations to evaluate superficial and deep microcirculation.

Main Results:

  • A small, statistically significant decrease (3%) in superficial SO2 was observed at the thumb and thenar eminence.
  • Deep palmar SO2 showed significant changes (3%) at 5 out of 7 measured positions.
  • Minor changes in venous filling pressure and capillary blood flow were noted in specific locations, with only 2 of 56 positions exceeding a 5% threshold. No clinical signs of malperfusion or impairment in daily activities were reported.

Conclusions:

  • Long-term objective evaluation confirms that radial artery harvesting for coronary revascularization does not compromise palmar microcirculation.
  • The observed microcirculatory changes are minimal and do not lead to functional deficits.
  • Radial artery harvesting is a safe procedure regarding hand microvascular integrity.
Abstract

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