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Gringeri, Enrico (2008) Un nuovo sistema di perfusione parenchimale per la preservazione del graft epatico per trapianto: valutazione sperimentale sul piccolo e grande animale. [Tesi di dottorato]

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Abstract (inglese)

Background

In liver transplantation one of the most important promblem which has not a solution yet is the large discrepancy between supply and demand for liver transplantation. To expand the pool of organs we should find the way to utilize marginal livers like the Non-heart-beating-donors ones and the fatty grafts. The use of these livers is associated with high incidence of post-operative primary dysfunction caused by the damage due to the Cold Storage preservation in the context of the process of ischaemia- reperfusion in extreme hypothermia (4° C). The utilization of new methods in the conservation of hepatic grafts like Machine Perfusion becomes necessary, especially for its ability to reduce the damage of ischaemia-reperfusion in hypothermia.
The great potentiality of this Machine in sane and marginal organ preservation and the number of works which took place about it, stimulated us to the deepen this argument.

Purpose

We decided to create a experimental model of Machine Perfusion for pigs and to test it with different temperatures to obtain the best condition of perfusion and graft preservation. We based our study on the various works that can be find in literature and on the research developed by the Università di Pavia on rats.

Methods

We used in our experiments 15 Landrace pig of the weight of 22 kilos each. We divided them in three groups of study. Group C: after hepatectomy the pig liver was preserved in Cold Storage (4° C) for 8 hours. Group N: after hepatectomy the pig liver was perfused in Normothermic Machine Perfusion (37°C) for 8 hours. Group I: the pig liver was perfused in Moderate Hypothermic Machine (20°C). After the preservation, all the 15 livers were tested with a rewarming (37°C) of 2 hours. During the two hours of the experiment we performed samples of blood and biopsies and we also valuated the indocianine green clearance.

Results

The results obtained by the histology, the functional test and biochemical levels of AST, ALT and LDH, in the moderate hypothermic perfusion prove the superiority of this machine .

Conclusion

It is concluded after these experiments the great ability of 20°C Machine Perfusion in pig's liver transplantation. We think that this method of preservation will be able to improve the pool of donors using NHBD livers and fatty livers. In future our research will deepen the problematic connected with the preservation of marginal organs, in particular of steatotic livers.


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Tipo di EPrint:Tesi di dottorato
Relatore:cillo, umberto
Dottorato (corsi e scuole):Ciclo 20 > Scuole per il 20simo ciclo > SCIENZE MEDICHE, CLINICHE E SPERIMENTALI > SCIENZE CHIRURGICHE ED APPLICAZIONI TECNOLOGICHE
Data di deposito della tesi:Gennaio 2008
Anno di Pubblicazione:Gennaio 2008
Parole chiave (italiano / inglese):machine perfusion, normothermic, liver transplantation, ischemia-reperfusion injury
Settori scientifico-disciplinari MIUR:Area 06 - Scienze mediche > MED/18 Chirurgia generale
Struttura di riferimento:Dipartimenti > Dipartimento di Scienze Chirurgiche Gastroenterologiche "Pier Giuseppe Cevese"
Codice ID:590
Depositato il:09 Ott 2008
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