| Thermodynamic correlates of hot tip laser angioplasty. | |
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MedLine Citation:
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PMID: 3440729 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Surface temperatures of normal human cadaver arteries and polytetrofluoroethylene grafts were measured in vitro using thermography to assess vascular wall heating from the metal-capped ("hot tip") laser probe. Laser pulse duration, vessel diameter, blood flow, and saline infusion were varied; power from an Argon laser was constant at 10 watts. The surface temperatures resulting in perforation were 76.2 +/- 2.2 degrees C for arteries and 90.4 +/- 2.1 degrees C for grafts. Blood flow provided an effective heat sink reducing artery and graft wall peak temperatures from 10 watt/5 sec pulses by 12.2 +/- 1.7 and 14.1 +/- 6.1 degrees C at 100 mL/min, and by 16.3 +/- 2.4 and 22.4 +/- 4.9 degrees C at 500 mL/min, respectively. In the occluded conduit, inflow of saline proximal to the probe tip reduced peak temperatures (degrees C) from 10 watt/5 sec pulses as follows: 14.0 +/- 3.2 (artery) and 23.2 +/- 8.5 (graft) at 50 mL/min, and 19.0 +/- 0.6 (artery) and 26.6 +/- 8.5 (graft) at 100 mL/min. Radial heating by the hot tip probe can cause thermal perforation. Blood flow or saline infusion modifies nontarget heating and may offer significant protection to the vasculature. |
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Authors:
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J D Labs; R I White; J H Anderson; G M Williams |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Investigative radiology Volume: 22 ISSN: 0020-9996 ISO Abbreviation: Invest Radiol Publication Date: 1987 Dec |
Date Detail:
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Created Date: 1988-04-14 Completed Date: 1988-04-14 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0045377 Medline TA: Invest Radiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 954-9 Citation Subset: IM |
Affiliation:
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Department of Surgery, Johns Hopkins Hospital, Baltimore, Maryland 21205. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Arteriosclerosis
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surgery Blood Vessel Prosthesis Cadaver Humans Laser Therapy* Polytetrafluoroethylene Thermodynamics* |
| Chemical | |
Reg. No./Substance:
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9002-84-0/Polytetrafluoroethylene |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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