The Effect of Twist on Microvascular Anastomotic Patency and Angiographic Luminal Dimensions

Izquierdo, Ricardo; Dobrin, Philip B.; Fu, Kaiding; Park, Fred; Galante, Gustavo

doi:10.1006/jsre.1997.5228

Cited by 37 publications

(25 citation statements)

References 6 publications

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“…We agree with Topalan et al 2 that the technical faults and different species of rats used (Wistar rats in the study of Salgarello et al 4 vs. Sprague-Dawley rats in the studies of Bilgin et al, 1 Topalan et al, 2 and Izquierdo et al 3 ) may alter the final outcome because of different cross-sectional histologies of the artery: 2 these variations can explain the slightly different results reported.…”

Section: Effect Of Torsion On Microvenous Anastomotic Patency In Rat supporting

confidence: 82%

“…These articles report slightly different results from, and give extra data (e.g., a greater number of different degrees of rotation of the microarterial and microvenous anastomoses; histopathology and scanning electron microscopy studies; and recannulation of the thrombosed vessels) to the previously published papers concerning patency rates after torsion of the arterial 3,4 and venous microanastomoses.…”

Section: Effect Of Torsion On Microvenous Anastomotic Patency In Rat mentioning

confidence: 93%

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Effect of torsion on microvenous anastomotic patency in rat model and early thrombolytic phenomenon

et al. 2004

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Section: Effect Of Torsion On Microvenous Anastomotic Patency In Rat supporting

confidence: 82%

Section: Effect Of Torsion On Microvenous Anastomotic Patency In Rat mentioning

confidence: 93%

Effect of torsion on microvenous anastomotic patency in rat model and early thrombolytic phenomenon

et al. 2004

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“…According to the study of Izguerdo et al, which was performed in arteries, the patency rates were lower than 50% with a torsion of 270°in the rat femoral artery, but in our study, patency rates lower than 50% were observed with torsion of 135°in the rat femoral veins. 6 Thus, veins are doubly more sensitive to the torsional effect at the anastomosis site, based on these findings.…”

Section: Discussionmentioning

confidence: 88%

Effect of torsion on microvenous anastomotic patency in a rat model and early thrombolytic phenomenon

Bilgin

Topalan

et al. 2003

Microsurgery

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Torsion at the microanastomosis site is a basic fault and should be avoided. In this study, we investigate the effects of different degrees of microvenous torsion on patency and its physical changes on anastomoses in a rat model. One hundred anastomoses were performed at different degrees of torsion, using femoral veins of Sprague-Dawley rats. Anastomoses were performed at 0 degrees, 45 degrees, 90 degrees, 135 degrees, and 180 degrees of torsion randomly. Patency tests immediately, 1 h, and 1 week after the anastomoses were checked, using the refill test. Measurements of external diameter were recorded at three points: one at the anastomosis site, and the others 2 mm proximal and distal to the anastomotic site. Finally, histopathologic and scanning electron microscopy studies were performed. Subsequently, because of the peculiar phenomenon of early recannulation of the thrombosed vessels, 20 vessels were also explored on the first and the third days postoperatively. The data demonstrate that torsion at 180 degrees, compared with 0 degrees, 45 degrees, and 90 degrees, impaired patency significantly (P < 0.005). In the subsequent study of 20 veins that were thrombosed on the first day, all became patent on the third day and remained so. In conclusion, rotation of a microvenous anastomosis begins to affect the patency rate at 90 degrees of torsion, and at 180 degrees has a patency rate of only 25%. However, all become patent again from the third day onwards. Thrombosis of rat femoral veins without chronic obstruction results in rapid lysis of thrombus and transient proliferative changes.

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“…1 This problem has been first studied experimentally by Izquierdo et al, 4 who first evaluated the effect of twist on microvascular anastomosis patency on arteries, measuring the cross-sectional areas of the vessels. Later, Salgarello et al 2 extended the experiment to the veins, comparing patency rates of arteries and veins after twisting of the microanastomosis and determined the increased risk of microanastomosis failure for different degrees of twisting: 3 days patency rates for arterial microanastomoses were 100% with a 08 twist, 80.9% with a 908 twist, 68.4% with a 1808 twist, and 64.2% with a 2708 twist; for venous microanastomoses, patency rates were 100% with a 08 twist, 85% with a 908 twist, 28.5% with a 1808, and 25% with a 2708 twist (all the data being statistically significant).…”

Section: Discussionmentioning

confidence: 99%

“…Izquierdo et al 4 studied the effect of twist on microvascular anastomosic patency on arteries, measuring the cross-sectional areas of the vessels. Twists of 08, 908, 1808 did not impair patency at a statistically significant level, but twists of 2708 did significantly reduce patency of microvascular anastomoses (P < 0.05).…”

mentioning

confidence: 99%

Mathematical explanation of the buckling of the vessels after twisting of the microanastomosis

2006

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The Effect of Twist on Microvascular Anastomotic Patency and Angiographic Luminal Dimensions

Cited by 37 publications

References 6 publications

Effect of torsion on microvenous anastomotic patency in rat model and early thrombolytic phenomenon

Effect of torsion on microvenous anastomotic patency in rat model and early thrombolytic phenomenon

Effect of torsion on microvenous anastomotic patency in a rat model and early thrombolytic phenomenon

Mathematical explanation of the buckling of the vessels after twisting of the microanastomosis

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