70 vs 120 W thulium:yttrium-aluminium-garnet 2 μm continuous-wave laser for the treatment of benign prostatic hyperplasia: a systematic ex-vivo evaluation
Identifieur interne : 000F01 ( Main/Exploration ); précédent : 000F00; suivant : 000F0270 vs 120 W thulium:yttrium-aluminium-garnet 2 μm continuous-wave laser for the treatment of benign prostatic hyperplasia: a systematic ex-vivo evaluation
Auteurs : Thorsten Bach [Allemagne] ; Nina Huck [Allemagne] ; Felix Wezel [Allemagne] ; Axel H Cker [Allemagne] ; Andreas J. Gross [Allemagne] ; Maurice Stephan Michel [Allemagne] ; Alexis Te [États-Unis]Source :
- BJU international : (Papier) [ 1464-4096 ] ; 2010.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Aluminium.
English descriptors
- KwdEn :
Abstract
OBJECTIVE To evaluate the ablative and haemostatic properties of the recently introduced 120-W thulium:yttrium-aluminium-garnet (Tm-YAG) laser and to assess these results against those of the previously introduced 70-W Tm-YAG laser. MATERIALS AND METHODS The ex-vivo model of the isolated blood-perfused porcine kidney was used to determine the ablation capacity, haemostatic properties and coagulation depth of a 2 μm continuous-wave Tm-YAG laser. The energy was delivered using a 550-μm and an 800-μm bare-ended fibre. The results of the recently introduced 120-W Tm-YAG were compared to the established 70-W device. Kidney tissue was embedded for histological evaluation. After staining (haematoxylin and eosin, H&tE; and NADH) of the specimen, the coagulation zone and depth of the necrotic tissue layer were measured. RESULTS With increased power output, the mean (SD) rate of vaporization of tissue increased, from 9.80 (3.03) g/10 min at 70 W to 16.41 (5.2) g/ 10 min at 120 W using the 550 μm fibre. The total amount of ablated tissue using the 800 μm fibre was lower than with the 550 μm fibre. With increasing power output the bleeding rate remained stable in either group. Tissue penetration remained shallow, even with increasing power output. In contrast to H&tE staining, where the coagulation zone was measured, NADH staining showed an inner zone of necrotic tissue, again with no difference between the 70- and the 120-W Tm-YAG. CONCLUSION The 120-W Tm-YAG offers significantly higher ablation rates than the 70-W device, and despite the increased rate of ablation with the 120-W Tm-YAG, the bleeding rate and depth of tissue penetration were comparable to those using the 70-W device.
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Gross</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Department of Urology, Asklepios Hospital Barmbek</s1><s2>Hamburg</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><settlement type="city">Hambourg</settlement><region type="land" nuts="2">Hambourg</region></placeName></affiliation></author><author><name sortKey="Stephan Michel, Maurice" sort="Stephan Michel, Maurice" uniqKey="Stephan Michel M" first="Maurice" last="Stephan Michel">Maurice Stephan Michel</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Department of Urology, University Medical Centre Mannheim</s1><s2>Mannheim</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Mannheim</settlement></placeName></affiliation></author><author><name sortKey="Te, Alexis" sort="Te, Alexis" uniqKey="Te A" first="Alexis" last="Te">Alexis Te</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Urology, Weill Medical College of Cornell University and New York Presbyterian Hospital</s1><s2>New York, NY</s2><s3>USA</s3><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>New York, NY</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">10-0372794</idno><date when="2010">2010</date><idno type="stanalyst">PASCAL 10-0372794 INIST</idno><idno type="RBID">Pascal:10-0372794</idno><idno type="wicri:Area/Pascal/Corpus">000336</idno><idno type="wicri:Area/Pascal/Curation">000336</idno><idno type="wicri:Area/Pascal/Checkpoint">000400</idno><idno type="wicri:explorRef" wicri:stream="Pascal" wicri:step="Checkpoint">000400</idno><idno 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type="city">Mannheim</settlement></placeName></affiliation><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Department of Urology, Asklepios Hospital Barmbek</s1><s2>Hamburg</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><settlement type="city">Hambourg</settlement><region type="land" nuts="2">Hambourg</region></placeName></affiliation></author><author><name sortKey="Huck, Nina" sort="Huck, Nina" uniqKey="Huck N" first="Nina" last="Huck">Nina Huck</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Department of Urology, University Medical Centre Mannheim</s1><s2>Mannheim</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Mannheim</settlement></placeName></affiliation></author><author><name sortKey="Wezel, Felix" sort="Wezel, Felix" uniqKey="Wezel F" first="Felix" last="Wezel">Felix Wezel</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Department of Urology, University Medical Centre Mannheim</s1><s2>Mannheim</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Mannheim</settlement></placeName></affiliation></author><author><name sortKey="H Cker, Axel" sort="H Cker, Axel" uniqKey="H Cker A" first="Axel" last="H Cker">Axel H Cker</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Department of Urology, University Medical Centre Mannheim</s1><s2>Mannheim</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Mannheim</settlement></placeName></affiliation></author><author><name sortKey="Gross, Andreas J" sort="Gross, Andreas J" uniqKey="Gross A" first="Andreas J." last="Gross">Andreas J. Gross</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Department of Urology, Asklepios Hospital Barmbek</s1><s2>Hamburg</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><settlement type="city">Hambourg</settlement><region type="land" nuts="2">Hambourg</region></placeName></affiliation></author><author><name sortKey="Stephan Michel, Maurice" sort="Stephan Michel, Maurice" uniqKey="Stephan Michel M" first="Maurice" last="Stephan Michel">Maurice Stephan Michel</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Department of Urology, University Medical Centre Mannheim</s1><s2>Mannheim</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Mannheim</settlement></placeName></affiliation></author><author><name sortKey="Te, Alexis" sort="Te, Alexis" uniqKey="Te A" first="Alexis" last="Te">Alexis Te</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Urology, Weill Medical College of Cornell University and New York Presbyterian Hospital</s1><s2>New York, NY</s2><s3>USA</s3><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>New York, NY</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">BJU international : (Papier)</title><title level="j" type="abbreviated">BJU int. : (Print)</title><idno type="ISSN">1464-4096</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">BJU international : (Papier)</title><title level="j" type="abbreviated">BJU int. : (Print)</title><idno type="ISSN">1464-4096</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ablation</term><term>Aluminium</term><term>Benign prostatic hyperplasia</term><term>Blood coagulation</term><term>Comparative study</term><term>Continuous wave</term><term>Evaluation</term><term>Ex vivo</term><term>Laser</term><term>Nephrology</term><term>Prostate</term><term>Thulium</term><term>Tissue</term><term>Urology</term><term>Yttrium</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Adénome de la prostate</term><term>Etude comparative</term><term>Thulium</term><term>Yttrium</term><term>Aluminium</term><term>Onde entretenue</term><term>Ex vivo</term><term>Evaluation</term><term>Prostate</term><term>Tissu</term><term>Ablation</term><term>Coagulation sanguine</term><term>Laser</term><term>Néphrologie</term><term>Urologie</term><term>Traitement laser</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Aluminium</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">OBJECTIVE To evaluate the ablative and haemostatic properties of the recently introduced 120-W thulium:yttrium-aluminium-garnet (Tm-YAG) laser and to assess these results against those of the previously introduced 70-W Tm-YAG laser. MATERIALS AND METHODS The ex-vivo model of the isolated blood-perfused porcine kidney was used to determine the ablation capacity, haemostatic properties and coagulation depth of a 2 μm continuous-wave Tm-YAG laser. The energy was delivered using a 550-μm and an 800-μm bare-ended fibre. The results of the recently introduced 120-W Tm-YAG were compared to the established 70-W device. Kidney tissue was embedded for histological evaluation. After staining (haematoxylin and eosin, H&tE; and NADH) of the specimen, the coagulation zone and depth of the necrotic tissue layer were measured. RESULTS With increased power output, the mean (SD) rate of vaporization of tissue increased, from 9.80 (3.03) g/10 min at 70 W to 16.41 (5.2) g/ 10 min at 120 W using the 550 μm fibre. The total amount of ablated tissue using the 800 μm fibre was lower than with the 550 μm fibre. With increasing power output the bleeding rate remained stable in either group. Tissue penetration remained shallow, even with increasing power output. In contrast to H&tE staining, where the coagulation zone was measured, NADH staining showed an inner zone of necrotic tissue, again with no difference between the 70- and the 120-W Tm-YAG. CONCLUSION The 120-W Tm-YAG offers significantly higher ablation rates than the 70-W device, and despite the increased rate of ablation with the 120-W Tm-YAG, the bleeding rate and depth of tissue penetration were comparable to those using the 70-W device.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>États-Unis</li></country><region><li>Bade-Wurtemberg</li><li>District de Karlsruhe</li><li>Hambourg</li></region><settlement><li>Hambourg</li><li>Mannheim</li></settlement></list><tree><country name="Allemagne"><region name="Bade-Wurtemberg"><name sortKey="Bach, Thorsten" sort="Bach, Thorsten" uniqKey="Bach T" first="Thorsten" last="Bach">Thorsten Bach</name></region><name sortKey="Bach, Thorsten" sort="Bach, Thorsten" uniqKey="Bach T" first="Thorsten" last="Bach">Thorsten Bach</name><name sortKey="Gross, Andreas J" sort="Gross, Andreas J" uniqKey="Gross A" first="Andreas J." last="Gross">Andreas J. Gross</name><name sortKey="H Cker, Axel" sort="H Cker, Axel" uniqKey="H Cker A" first="Axel" last="H Cker">Axel H Cker</name><name sortKey="Huck, Nina" sort="Huck, Nina" uniqKey="Huck N" first="Nina" last="Huck">Nina Huck</name><name sortKey="Stephan Michel, Maurice" sort="Stephan Michel, Maurice" uniqKey="Stephan Michel M" first="Maurice" last="Stephan Michel">Maurice Stephan Michel</name><name sortKey="Wezel, Felix" sort="Wezel, Felix" uniqKey="Wezel F" first="Felix" last="Wezel">Felix Wezel</name></country><country name="États-Unis"><noRegion><name sortKey="Te, Alexis" sort="Te, Alexis" uniqKey="Te A" first="Alexis" last="Te">Alexis Te</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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