Document Detail


Intraluminal albumin stent assisted laser welding for ureteral anastomosis.
MedLine Citation:
PMID:  12355565     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND AND OBJECTIVES: The success of laser tissue welding or soldering depends on optimal laser settings, solder material, and tissue type and geometry. To develop a practical laser welding technique for ureteral repair, an intraluminal albumin stent was designed to enhance the welding effects on ureteral end to end anastomosis. STUDY DESIGN/MATERIALS AND METHODS: In vitro porcine ureters were anastomosed using an albumin stent alone, the albumin stent plus a solder, and the solder alone. All welding was performed with an 810-nm diode laser with either a continuous wave (1 W, CW) or two pulse modes (2 W, 3.3 Hz; 1 W, 5 Hz). Laser parameters, tensile strength (TS) and burst pressure (BP) of the ureteral anastomosis, and tissue thermal injury were measured. RESULTS: In the 2-W pulse mode, BP in the albumin stent plus solder group (mean 185 mmHg) and the stent only group (mean 133 mmHg) were significantly higher than the solder only group (mean 77 mmHg, P < 0.05). Laser ureteral anastomosis with the stent plus solder group at 1-W CW and 2-W pulse laser modes yielded the highest TS (mean 97, 82 g) and BP (mean 183, 185 mmHg). Among the three modes, the 1 W pulse delivered the lowest energy and yielded the lowest TS and BP in ureteral anastomosis. There was no significant difference in the thermal damage to the tissue among the modes and groups. CONCLUSIONS: Using the albumin stent increased the reliability of ureter end-to-end laser anastomosis. Further studies will be warranted in vivo and other tubular organs as well.
Authors:
Hua Xie; Brian S Shaffer; Scott A Prahl; Kenton W Gregory
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Publication Detail:
Type:  In Vitro; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Lasers in surgery and medicine     Volume:  31     ISSN:  0196-8092     ISO Abbreviation:  Lasers Surg Med     Publication Date:  2002  
Date Detail:
Created Date:  2002-09-30     Completed Date:  2003-01-03     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8007168     Medline TA:  Lasers Surg Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  225-9     Citation Subset:  IM    
Copyright Information:
Copyright 2002 Wiley-Liss, Inc.
Affiliation:
Oregon Medical Laser Center, Providence St Vincent Medical Center, 9205 SW Barnes Rd, Portland, Oregon 97225, USA. hxie@providence.org
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MeSH Terms
Descriptor/Qualifier:
Albumins / therapeutic use*
Anastomosis, Surgical / methods*
Animals
Blood Vessel Prosthesis Implantation / methods*
Disease Models, Animal
Endothelium, Vascular / pathology,  surgery*
Laser Therapy / methods*
Reproducibility of Results
Stents*
Swine
Ureteral Diseases / pathology,  surgery*
Chemical
Reg. No./Substance:
0/Albumins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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