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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
2
|
| pubmed:dateCreated |
1998-5-7
|
| pubmed:abstractText |
This study was designed to investigate the simultaneous changes in blood flow and microcirculation in an island flap during venous occlusion (venous ischemia), in an ischemia/reperfusion injury model in the rabbit. An island groin flap based on the inferior epigastric vessels was harvested in 15 rabbits. The flap was rendered ischemic for 3 hr (n = 5) or 4 hr (n = 10, 5 heparinized and 5 not), by applying a microvascular clamp to the inferior epigastric vein. Transonic Doppler and laser Doppler were used to monitor blood flow in the epigastric artery and microcirculation of the flap for 1 hr after flap elevation, 1 hr after occlusion, and for 3 hr at the end of the ischemic period. Venous occlusion was followed by a rapid decrease of blood flow and microcirculation readings. After ischemia, both blood flow and microcirculation readings in the flap were significantly decreased, compared to pre-ischemic values in all groups. In the 3-hr ischemia group, blood flow readings returned to pre-stress values, while microcirculation remained significantly lower. In the 4-hr ischemia group treated with heparin, blood flow in the artery settled at levels significantly lower than pre-stress readings; however, microcirculation of the flap was ultimately fully restored to pre-ischemic values. In the 4-hr ischemia group, both blood flow and microcirculation in the flap settled at levels significantly lower than pre-stress values. The authors concluded that tolerance for venous ischemia is time-dependent in this model and that venous ischemia is more deleterious than global ischemia. Administration of heparin may alter the time frame of ischemia/reperfusion injury and may prevent the harmful effects of injury at the microcirculatory level.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:status |
MEDLINE
|
| pubmed:month |
Feb
|
| pubmed:issn |
0743-684X
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
14
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
121-6
|
| pubmed:dateRevised |
2011-2-16
|
| pubmed:meshHeading |
pubmed-meshheading:9524331-Animals,
pubmed-meshheading:9524331-Disease Models, Animal,
pubmed-meshheading:9524331-Endothelium, Vascular,
pubmed-meshheading:9524331-Ischemia,
pubmed-meshheading:9524331-Male,
pubmed-meshheading:9524331-Microcirculation,
pubmed-meshheading:9524331-Rabbits,
pubmed-meshheading:9524331-Regional Blood Flow,
pubmed-meshheading:9524331-Surgical Flaps
|
| pubmed:year |
1998
|
| pubmed:articleTitle |
Venous flap ischemia: microcirculatory changes in experimental flaps in a rabbit model.
|
| pubmed:affiliation |
Department of Plastic Surgery, M.D. Anderson Cancer Center, Houston, Texas, USA.
|
| pubmed:publicationType |
Journal Article
|