• World Neurosurg · Oct 2021

    Toe-First Technique for End to Side Microvascular Anastomosis - A Technical Note.

    • Gaurav Tyagi, Dhaval Gohil, Gyani Jail Singh Birua, A R Prabhuraj, and Nupur Pruthi.
    • Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bangalore, India.
    • World Neurosurg. 2021 Oct 1; 154: 73-77.

    BackgroundThe use of the classic 2-ends anchoring technique is common in end-to side (ES) microvascular anastomosis. The literature on the toe-first (TF) technique is limited. In the current study we present the successful outcomes with the TF technique in ES anastomoses in rat femoral vessels model.MethodsES microvascular anastomosis with the tf technique was performed in the femoral vessels of 10 Sprague Dawley rats. Two-throw reef knot interrupted sutures were used in all cases. Individual parameters during the procedure were recorded for analysis. The immediate and delayed (cut open technique after 2 weeks) patencies were confirmed. An illustrative case showing the use of this technique in superficial temporal artery to middle cerebral artery bypass in a pediatric moyamoya disease case is included.ResultsThe average suturing time was 40.14 ± 5.30 minutes, the procedures were completed with an average of 14.57 ± 1.90 sutures. The average time per suture was 2.78 ± 0.43 minutes. The immediate patency was 100% (10 of 10 cases). Two rats died of unknown cause in the observation period. The delayed patency was 100% in the remaining 8 cases (average observation: 29.6 days).ConclusionsThe TF interrupted suture technique of ES microvascular anastomosis with 2-throw reef knots is feasible with excellent immediate and delayed patency rates. The distinct advantages of the TF are the continuous visualization of the recipient lumen during anastomoses, avoiding back-wall bites, and the ability to correct any discrepancy in the recipient-donor lumens during the procedure.Copyright © 2021 Elsevier Inc. All rights reserved.

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