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Variations in local elastic modulus along the length of the aorta as observed by use of a scanning haptic microscope (SHM).

Identifieur interne : 002877 ( Main/Exploration ); précédent : 002876; suivant : 002878

Variations in local elastic modulus along the length of the aorta as observed by use of a scanning haptic microscope (SHM).

Auteurs : Takeshi Moriwaki [Japon] ; Tomonori Oie ; Keiichi Takamizawa ; Yoshinobu Murayama ; Toru Fukuda ; Sadao Omata ; Keiichi Kanda ; Yasuhide Nakayama

Source :

Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs [ 1619-0904 ] ; 2011.

RBID : pubmed:21858475

English descriptors

KwdEn :
- Animals, Aorta (physiology), Dogs, Elastic Modulus, Extracellular Matrix (physiology), In Vitro Techniques, Microscopy, Scanning Probe.
MESH :
- physiology : Aorta, Extracellular Matrix.
- Animals, Dogs, Elastic Modulus, In Vitro Techniques, Microscopy, Scanning Probe.

Abstract

Variations in microscopic elastic structures along the entire length of canine aorta were evaluated by use of a scanning haptic microscope (SHM). The total aorta from the aortic arch to the abdominal aorta was divided into 6 approximately equal segments. After embedding the aorta in agar, it was cut into horizontal circumferential segments to obtain disk-like agar portions containing ring-like samples of aorta with flat surfaces (thickness, approximately 1 mm). The elastic modulus and topography of the samples under no-load conditions were simultaneously measured along the entire thickness of the wall by SHM by using a probe with a diameter of 5 μm and a spatial resolution of 2 μm at a rate of 0.3 s/point. The elastic modulus of the wall was the highest on the side of the luminal surface and decreased gradually toward the adventitial side. This tendency was similar to that of the change in the elastin fiber content. During the evaluation of the mid-portion of each tunica media segment, the highest elastic modulus (40.8 ± 3.5 kPa) was identified at the thoracic section of the aorta that had the highest density of elastic fibers. Under no-load conditions, portions of the aorta with high elastin density have a high elastic modulus.

DOI: 10.1007/s10047-011-0596-2
PubMed: 21858475

Affiliations:

Japon

Le document en format XML

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<front><div type="abstract" xml:lang="en">Variations in microscopic elastic structures along the entire length of canine aorta were evaluated by use of a scanning haptic microscope (SHM). The total aorta from the aortic arch to the abdominal aorta was divided into 6 approximately equal segments. After embedding the aorta in agar, it was cut into horizontal circumferential segments to obtain disk-like agar portions containing ring-like samples of aorta with flat surfaces (thickness, approximately 1 mm). The elastic modulus and topography of the samples under no-load conditions were simultaneously measured along the entire thickness of the wall by SHM by using a probe with a diameter of 5 μm and a spatial resolution of 2 μm at a rate of 0.3 s/point. The elastic modulus of the wall was the highest on the side of the luminal surface and decreased gradually toward the adventitial side. This tendency was similar to that of the change in the elastin fiber content. During the evaluation of the mid-portion of each tunica media segment, the highest elastic modulus (40.8 ± 3.5 kPa) was identified at the thoracic section of the aorta that had the highest density of elastic fibers. Under no-load conditions, portions of the aorta with high elastin density have a high elastic modulus.</div>
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<name sortKey="Murayama, Yoshinobu" sort="Murayama, Yoshinobu" uniqKey="Murayama Y" first="Yoshinobu" last="Murayama">Yoshinobu Murayama</name>
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Serveur d'exploration sur les dispositifs haptiques

Variations in local elastic modulus along the length of the aorta as observed by use of a scanning haptic microscope (SHM).

Variations in local elastic modulus along the length of the aorta as observed by use of a scanning haptic microscope (SHM).

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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	Serveur d'exploration sur les dispositifs haptiques
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