Skin donations after suicide by acute poisoning.

The demand for skin tissue allografts to treat burns and other types of injuries increases each year to the extent that categories of donors formerly deemed "unsuitable", such as victims of suicide by polytrauma or poisoning, are now considered. Patients who died by ingestion of/exposure to toxic substances can be accepted as tissue donors after assessment of graft safety to rule out any risks of transferring toxic substances to the recipient. A cadaveric skin donation was obtained from a 57-year-old woman who died from intoxication after ingesting colchicine tablets (0.2 mg/kg). To determine the safety of cadaveric skin allografts, high-performance liquid chromatography-mass spectrometry (LC-MS/MS) was used to identify and quantify colchicine in procured skin. Results revealed that colchicine concentrations were lower than the instrument limit of detection (LOD) of 0.5 ng/mg both in epidermis and dermis. Cell viability assessed through the MTT ([3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide]) test was within standard limits. Thanks to accurate tests performed, which are routinely applied also in clinical diagnostics and forensic toxicology, it was possible to ascertain the safety and suitability of skin tissue for donation.

Cerebral microemboli detected by transcranial doppler in patients treated with extracorporeal membrane oxygenation.

INTRODUCTION: Cerebrovascular complications rate in patients treated with extracorporeal membrane oxygenation (ECMO) is about 7%. Ischemic stroke may be caused by solid or gaseous microemboli due to thrombosis within the circuit or cannula. Transcranial Doppler (TCD) is the only method able to detect microembolic signals (MES) in real time. The objective of this study was to detect possible MES by TCD in patients treated with veno-venous (VV) and veno-arterial (VA) ECMO and to test for a relation between the number of MES and the 6-month clinical outcome of these patients. METHODS: This is a monocentric observational prospective study in patients consecutively admitted and treated with ECMO at our regional ECMO referral center in 18 months. TCD detection of MES was performed in patients upon initiation of treatment and then repeated during treatment. RESULTS: Two hundred and forty-eight TCD monitoring were performed in 42 VV and 11 VA ECMO patients. MES were detected in 26.2% of VV ECMO patients and in 81.8% of VA ECMO patients (P < 0.001). In both subgroups of patients, no correlation was found between MES detection and extracorporeal flow velocities or aPTT values. In VA ECMO patients, an inverse correlation between left ventricular ejection fraction and MES grading was found (P = 0.037). In both groups, no clinical neurological impairments correlated to MES detection were found at 6 months follow-up. CONCLUSIONS: MES were found in both ECMO configurations; independently from their pathophysiology, MES do not seem to influence clinical outcome. Multicenter studies are still required with more extensive cases to confirm these results.

The role of extracorporeal membrane oxygenation in donation after circulatory death.

Donor scarcity and the increased need for organ transplantation has prompted the development of an alternative source of donors to the more conventional brain dead donor. While in a Beating-Heart donor, abdominal and intrathoracic organs are perfused, in a non-beating heart donor (NHBD, or DCD), perfusion should be maintained, after confirmation of death, by means of ECMO and inflation of intra-aortic balloon accordingly to the localization of the organs that should be transplanted. In this setting, ECMO allows selective perfusion of the organs which should be transplanted ("compartmental ECMO"). The present review is aimed at summarizing the rationale for ECMO use in organ donation in DCD and the available evidence on this topic, as well as available evidence (in clinical studies) on normothermic organ preservation using ECMO in adults. Despite the fact that available studies suffer from methodological limitations (small cohorts, retrospective analysis, not always comparative), they all reach the same conclusion: the concept of extracorporeal support with oxygenation in DCD seems very promising since it has been reported to increase the available organ supply by approximately 20% to 25%2 by increasing the number of donors by approximately 33%. Centres with ECMO facilities should implement local programmes for donation after cardiac death (both in the emergency department and intensive care) using ECMO taking into account that this technique has been proven to increase donor pool.