Origin of arterial wall dissections induced by pulsed excimer and mid-infrared laser ablation in the pig.
Identifieur interne : 003880 ( Main/Merge ); précédent : 003879; suivant : 003881Origin of arterial wall dissections induced by pulsed excimer and mid-infrared laser ablation in the pig.
Auteurs : T G Van Leeuwen [Pays-Bas] ; L. Van Erven ; J H Meertens ; M. Motamedi ; M J Post ; C. BorstSource :
- Journal of the American College of Cardiology [ 0735-1097 ] ; 1992.
Descripteurs français
- KwdFr :
- MESH :
- anatomopathologie : Aorte thoracique.
- effets indésirables : Angioplastie par laser, Lasers.
- traumatismes : Aorte thoracique.
- Animaux, Chlorure de sodium, Femelle, Nécrose, Suidae, Techniques in vitro.
English descriptors
- KwdEn :
- MESH :
- chemical : Sodium Chloride.
- adverse effects : Angioplasty, Laser, Lasers.
- injuries : Aorta, Thoracic.
- pathology : Aorta, Thoracic.
- Animals, Female, In Vitro Techniques, Necrosis, Swine.
Abstract
To study adjacent tissue damage after delivery of holmium, thulium and excimer laser pulses, porcine thoracic aortas were irradiated in vivo. After 3 days, microscopic analysis of 67 craters produced by all three lasers demonstrated large dissections extending from the craters. The mean diameter of the dissections was smaller for excimer-induced craters (1.38 +/- 0.42 mm; n = 22) than for holmium-induced (2.7 +/- 0.87 mm; n = 22) and thulium-induced (2.37 +/- 0.42 mm; n = 14) craters (p less than 0.01 vs. mid-infrared dissections). In addition, microscopic analysis demonstrated necrosis adjacent to the crater. The lateral necrotic zones of the thulium-induced craters were smaller than the holmium- and excimer-induced necrotic zones (p less than 0.01). To identify the origin of the excessive tissue tearing, laser-saline and laser-tissue interaction were compared in vitro by time-resolved flash photography. In saline solution, the mid-infrared lasers showed bubble formation on a microsecond time scale. The excimer laser produced similar bubbles in the vicinity of tissue. For all three lasers, elevation of the tissue surface was shown during in vitro ablation. Dimension (diameter up to 4 mm) and time course (rise time of 100 to 300 microseconds) of bubble formation and tissue elevation were strikingly similar. Thus, tissue dissections are caused by the expansion of a vapor bubble within the target tissue. Coronary dissections after excimer and mid-infrared laser angioplasty might be related to the forceful bubble expansion.
PubMed: 1593058
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pubmed:1593058Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Origin of arterial wall dissections induced by pulsed excimer and mid-infrared laser ablation in the pig.</title><author><name sortKey="Van Leeuwen, T G" sort="Van Leeuwen, T G" uniqKey="Van Leeuwen T" first="T G" last="Van Leeuwen">T G Van Leeuwen</name><affiliation wicri:level="1"><nlm:affiliation>Department of Cardiology, University Hospital Utrecht, The Netherlands.</nlm:affiliation><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>Department of Cardiology, University Hospital Utrecht</wicri:regionArea><wicri:noRegion>University Hospital Utrecht</wicri:noRegion></affiliation></author><author><name sortKey="Van Erven, L" sort="Van Erven, L" uniqKey="Van Erven L" first="L" last="Van Erven">L. Van Erven</name></author><author><name sortKey="Meertens, J H" sort="Meertens, J H" uniqKey="Meertens J" first="J H" last="Meertens">J H Meertens</name></author><author><name sortKey="Motamedi, M" sort="Motamedi, M" uniqKey="Motamedi M" first="M" last="Motamedi">M. Motamedi</name></author><author><name sortKey="Post, M J" sort="Post, M J" uniqKey="Post M" first="M J" last="Post">M J Post</name></author><author><name sortKey="Borst, C" sort="Borst, C" uniqKey="Borst C" first="C" last="Borst">C. Borst</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="1992">1992</date><idno type="RBID">pubmed:1593058</idno><idno type="pmid">1593058</idno><idno type="wicri:Area/PubMed/Corpus">000798</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000798</idno><idno type="wicri:Area/PubMed/Curation">000798</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000798</idno><idno type="wicri:Area/PubMed/Checkpoint">000798</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">000798</idno><idno type="wicri:Area/Ncbi/Merge">000122</idno><idno type="wicri:Area/Ncbi/Curation">000122</idno><idno type="wicri:Area/Ncbi/Checkpoint">000122</idno><idno type="wicri:doubleKey">0735-1097:1992:Van Leeuwen T:origin:of:arterial</idno><idno type="wicri:Area/Main/Merge">003880</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Origin of arterial wall dissections induced by pulsed excimer and mid-infrared laser ablation in the pig.</title><author><name sortKey="Van Leeuwen, T G" sort="Van Leeuwen, T G" uniqKey="Van Leeuwen T" first="T G" last="Van Leeuwen">T G Van Leeuwen</name><affiliation wicri:level="1"><nlm:affiliation>Department of Cardiology, University Hospital Utrecht, The Netherlands.</nlm:affiliation><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>Department of Cardiology, University Hospital Utrecht</wicri:regionArea><wicri:noRegion>University Hospital Utrecht</wicri:noRegion></affiliation></author><author><name sortKey="Van Erven, L" sort="Van Erven, L" uniqKey="Van Erven L" first="L" last="Van Erven">L. Van Erven</name></author><author><name sortKey="Meertens, J H" sort="Meertens, J H" uniqKey="Meertens J" first="J H" last="Meertens">J H Meertens</name></author><author><name sortKey="Motamedi, M" sort="Motamedi, M" uniqKey="Motamedi M" first="M" last="Motamedi">M. Motamedi</name></author><author><name sortKey="Post, M J" sort="Post, M J" uniqKey="Post M" first="M J" last="Post">M J Post</name></author><author><name sortKey="Borst, C" sort="Borst, C" uniqKey="Borst C" first="C" last="Borst">C. Borst</name></author></analytic><series><title level="j">Journal of the American College of Cardiology</title><idno type="ISSN">0735-1097</idno><imprint><date when="1992" type="published">1992</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Angioplasty, Laser (adverse effects)</term><term>Animals</term><term>Aorta, Thoracic (injuries)</term><term>Aorta, Thoracic (pathology)</term><term>Female</term><term>In Vitro Techniques</term><term>Lasers (adverse effects)</term><term>Necrosis</term><term>Sodium Chloride</term><term>Swine</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Angioplastie par laser (effets indésirables)</term><term>Animaux</term><term>Aorte thoracique (anatomopathologie)</term><term>Aorte thoracique (traumatismes)</term><term>Chlorure de sodium</term><term>Femelle</term><term>Lasers (effets indésirables)</term><term>Nécrose</term><term>Suidae</term><term>Techniques in vitro</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Sodium Chloride</term></keywords><keywords scheme="MESH" qualifier="adverse effects" xml:lang="en"><term>Angioplasty, Laser</term><term>Lasers</term></keywords><keywords scheme="MESH" qualifier="anatomopathologie" xml:lang="fr"><term>Aorte thoracique</term></keywords><keywords scheme="MESH" qualifier="effets indésirables" xml:lang="fr"><term>Angioplastie par laser</term><term>Lasers</term></keywords><keywords scheme="MESH" qualifier="injuries" xml:lang="en"><term>Aorta, Thoracic</term></keywords><keywords scheme="MESH" qualifier="pathology" xml:lang="en"><term>Aorta, Thoracic</term></keywords><keywords scheme="MESH" qualifier="traumatismes" xml:lang="fr"><term>Aorte thoracique</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Female</term><term>In Vitro Techniques</term><term>Necrosis</term><term>Swine</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Animaux</term><term>Chlorure de sodium</term><term>Femelle</term><term>Nécrose</term><term>Suidae</term><term>Techniques in vitro</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">To study adjacent tissue damage after delivery of holmium, thulium and excimer laser pulses, porcine thoracic aortas were irradiated in vivo. After 3 days, microscopic analysis of 67 craters produced by all three lasers demonstrated large dissections extending from the craters. The mean diameter of the dissections was smaller for excimer-induced craters (1.38 +/- 0.42 mm; n = 22) than for holmium-induced (2.7 +/- 0.87 mm; n = 22) and thulium-induced (2.37 +/- 0.42 mm; n = 14) craters (p less than 0.01 vs. mid-infrared dissections). In addition, microscopic analysis demonstrated necrosis adjacent to the crater. The lateral necrotic zones of the thulium-induced craters were smaller than the holmium- and excimer-induced necrotic zones (p less than 0.01). To identify the origin of the excessive tissue tearing, laser-saline and laser-tissue interaction were compared in vitro by time-resolved flash photography. In saline solution, the mid-infrared lasers showed bubble formation on a microsecond time scale. The excimer laser produced similar bubbles in the vicinity of tissue. For all three lasers, elevation of the tissue surface was shown during in vitro ablation. Dimension (diameter up to 4 mm) and time course (rise time of 100 to 300 microseconds) of bubble formation and tissue elevation were strikingly similar. Thus, tissue dissections are caused by the expansion of a vapor bubble within the target tissue. Coronary dissections after excimer and mid-infrared laser angioplasty might be related to the forceful bubble expansion.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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