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Porcine aortic anatomy is crucial for cardiac device testing. This study found no correlation between pig size and aortic dimensions, highlighting individual variability for surgical planning.

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Area of Science:

  • Veterinary Anatomy
  • Cardiovascular Research
  • Preclinical Medical Device Development

Background:

  • Pigs are vital preclinical models for cardiac surgery device development.
  • Existing research lacks detailed morphometric data for the porcine aortic root and thoraco-abdominal aorta.
  • This data gap hinders experimental surgery and can lead to device size mismatches, risking animal welfare.

Purpose of the Study:

  • To investigate the anatomical characteristics of the aorta in laboratory mini pigs.
  • To determine the influence of animal size, age, and sex on aortic structure dimensions.
  • To compare imaging modalities like transesophageal echocardiography (TEE) and angiography for aortic assessment.

Main Methods:

  • Study involved 28 laboratory mini pigs categorized into three weight groups (40-70 kg, 71-90 kg, >90 kg).
  • External somatometric characteristics were recorded.
  • Aortic structures were assessed, and results from TEE and angiography were compared.

Main Results:

  • No significant relationship was found between external somatometric characteristics (size, age, sex) and aortic dimensions.
  • Significant individual anatomical variability in the porcine cardiovascular system was observed.
  • Both TEE and angiography provided valuable insights, though individual assessment is paramount.

Conclusions:

  • Preoperative planning for experiments using mini pigs requires individual assessment of aortic anatomy.
  • Standardized morphometric data is lacking, emphasizing the need for imaging techniques like echocardiography, angiography, or CT.
  • Understanding individual aortic variability is essential for successful preclinical cardiac device testing in pigs.