The gradual onset brain death model: a relevant model to study organ donation and its consequences on the outcome after transplantation.

Organs used for transplantation are usually derived from heart-beating brain dead donors. However, brain death is known to have negative effects on donor organ quality, previously studied using a difficult to control sudden onset experimental model. We have now developed a reproducible gradual onset brain death model in rats without requiring inotropic support. Fisher inbred rats weighing 260-300 g were used. Brain death was induced by a gradual inflation of a subdurally placed balloon catheter. During induction and the period following brain death, the animals were mechanically ventilated and blood pressure was continuously monitored. The blood pressure registration showed a characteristic pattern during brain death induction, in which a decrease in blood pressure, a hypotensive period in which the Cushing response occurred, and a sharp peak were consistent findings. After brain death was induced, blood pressure was maintained at normotensive levels up to 4 h. After the experiments, neuropathological evaluation of the brain located haemorrhagic cerebral parenchyma, and immunocytochemistry of liver tissue revealed a significant influx of polymorph nuclear cells, as was previously observed as well. This improved model allows the study of brain death on donor organ quality without the use of inotropic support

Thirty-seven patients treated with the C-seal:protection of stapled colorectal anastomoses with a biodegradable sheath

<p>The present study was performed to get a better insight in the incidence of anastomotic leakage leading to reintervention when using the C-seal: a biodegradable sheath that protects the stapled colorectal anastomosis from leakage.</p><p>The C-seal is a thin walled tube-like sheath that forms a protective sheath within the bowel lumen. Thirty-seven patients undergoing surgery with creation of a stapled colorectal anastomosis with C-seal were analyzed. Follow-up was completed until 3 months after surgery.</p><p>One patient (3 %) developed anastomotic leakage leading to reintervention. None of the 37 anastomoses was dismantled. One patient was diagnosed with a rectovaginal fistula. In three patients (8 %), a perianastomotic abscess spontaneously drained.</p><p>The incidence of anastomotic leakage leading to reintervention when using the C-seal (3 %) is lower than expected based on the literature (11 %). We have currently set-up a multicenter randomized trial to confirm the efficiency of the C-seal (www.csealtrial.nl).</p>