Date: Monday, June 13, 2016
Session Time: 6:00pm-7:00pm
Presentation Time: 6:00pm-7:00pm
Location: Halls C&D
Successful replantation in patients suffering from traumatic amputation of one or more extremities is limited by the muscle ischemia time of 4-6h, which also holds true for VCA transplantation. We investigated the use of ex vivo perfusion to extend the ischemia time beyond this threshold.
In a large animal model, porcine forelimbs were amputated and either perfused with an extracorporeal membrane oxygenation device and adapted acellular perfusion solution (Perfadex®) for 12h at 10[deg]C (treatment; n=3) or stored on ice slurry at 4[deg]C (control; n=4) before replantation. Animals were sacrificed on day 7. Histologic and electron microscopy assessment, gene expression profiles and cytokine assays, as well as clinical parameters, blood gas and urine analysis were compared between groups.
Histopathological evaluation showed less tissue damage during perfusion (6.47% hypoxic cells in control after 4 hours vs. 0.77% in treatment, p=0.005)and after replantation in the treatment group(33.66% damaged cells in control vs. 11.55% in treatment, p=0.05 ). Animals in the treatment group had fewer difficulties in recovering early after surgery in terms of transient accelerated heart rates, cardiac dysrhythmias and decrease of oxygen saturation in the first 3 hours post-op. Gene expression profiling showed activation of the hypoxic pathway (HIF1-α&β) in the control group with maximum 24 hours after reperfusion.
Ex vivo perfusion of amputated limbs can extend the allowable ischemia time up to 12h. This has important clinical implications because one of the current major limitations for limb allotransplantation is the short muscle ischemia time resulting in a limited time window and accompanied limited donor pool for transplantation.
CITATION INFORMATION: Krezdorn N, Kueckelhaus M, Dermietzel A, Alhefzi M, Aycart M, Fischer S, Win T.-S, Kiwanuka H, Bueno E, Pomahac B. Ex Vivo Perfusion of Porcine Forelimbs to Prolong Allowable Ischemia Time. Am J Transplant. 2016;16 (suppl 3).
To cite this abstract in AMA style:Krezdorn N, Kueckelhaus M, Dermietzel A, Alhefzi M, Aycart M, Fischer S, Win T-S, Kiwanuka H, Bueno E, Pomahac B. Ex Vivo Perfusion of Porcine Forelimbs to Prolong Allowable Ischemia Time. [abstract]. Am J Transplant. 2016; 16 (suppl 3). https://atcmeetingabstracts.com/abstract/ex-vivo-perfusion-of-porcine-forelimbs-to-prolong-allowable-ischemia-time/. Accessed March 3, 2021.
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