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  • Machine perfusion  (2)
  • Adenosine, kidney, preservation  (1)
  • 1
    ISSN: 1432-2277
    Schlagwort(e): Kidney, preservation, retrograde oxygen ; Preservation, kidney, retrograde oxygen ; Retrograde oxygen, preservation, kidney ; Adenosine, kidney, preservation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Retrograde oxygen persufflation (ROP) has been reported to be beneficial to kidney preservation. The purpose of this study was to investigate whether use of ROP during cold storage (CS) with Universita of Wisconsin (UW) solution could ameliorate energy metabolism and functional recovery of ischemically injured rat kidneys and, moreover, to study the particular role of adenosine (ADO) in CS with ROP. Kidneys subjected to 30 min of warm ischemia (WI) were preserved for 24 h in 4°C UW solution with or without ROP and with or without ADO. Measurements of tissue highenergy phosphate levels showed that reduced total adenine nucleotides (TAN) after 30 min of WI further declined during the subsequent CS. In ROP kidneys, however, TAN were less reduced, suggesting that even during CS, TAN can still be regenerated in the injured kidneys when ROP is combined with UW solution. When UW did not contain ADO, regeneration of TAN by ROP was slightly less than in the case of UW with ADO. This indicates that the supply of molecular oxygen is a significant factor in TAN resynthesis during CS. There was no statistically significant difference in survival rate between the ROP and CS group, indicating that an improved energy status is not the sole determinant of functional recovery. We conclude that the gaseous oxygen supply provided by ROP during CS in UW solution ameliorates the energy state of ischemically injured rat kidneys and that exogenous ADO from the UW solution contributes to the improvement of energy metabolism to a limited extent.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1432-2277
    Schlagwort(e): Key words Non-heart-beating ; Donor kidney ; Machine perfusion ; Viability assessment ; Kidney transplantation ; αGST
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Eleven non-heart-beating (NHB) donor kidneys considered vital during machine perfusion (MP), could not be allocated inside Eurotransplant (ET). With the help of ET, five kidneys were transplanted in Karachi and six in Basel. Our goal was to prove that NHB kidneys successfully passing MP viability tests can be transplanted safely. Methods: Donor age, serum creatinine (some post-mortem) and warm ischaemic time were, respectively, (mean and range): 44 (14–70) years, 137 μmol/l, and 44 (9–80) min. Reasons for refusal were: bold ureter (one), suboptimal flush (one), relatively long hypotensive phase (seven), and donor age of 70 years (two). After 8 h of MP, mean lactate dehydrogenase, intrarenal resistance and alpha glutathione S-transferase were (including range): 556 U/l (range 366–819 U/l), 0.86 mmHg/ml per min (0.41–1.15 mmHg/ml per min) and 1188 μg/l (575–2677 μg/l), respectively. Mean cold ischaemic time was 45 (range 28–72) h. Results: Two kidneys showed immediate function, and nine showed delayed function. Mean creatinine levels after 1, 3 and 6 months were 295, 200 and 206 μmol/l, respectively. Four patients died for reasons not related to their kidney transplantation. Conclusions: We claim that MP can successfully assess viability of NHB donor kidneys. The reluctance to accept MP, and judged vital, NHB donor kidneys is no longer justified.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 1432-2277
    Schlagwort(e): Key words Non-heart-beating donor ; machine perfusion ; Machine perfusion ; non-heart-beating donor ; Kidney transplantation ; non-heart-beating donor
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The functioning of non-heart-beating (NHB) donor kidneys upon transplantation is often delayed. To evaluate the effect of preservation by machine perfusion (MP) on early post-transplant function, 37 NHB donor kidneys were compared to 74 matched heart-beating (HB) donor kidneys preserved by cold storage (CS). The NHB donor kidneys were subject to 49 ± 34 min of warm ischemia. Delayed function (DF) and primary nonfunction (PNF) rates were significantly higher for NHB than for HB donor kidneys (49 % and 19 % vs 34 % and 7 %, respectively). Consequently, renal function was impaired but recovered within 6 months. MP could not eliminate the differences in DF rate between NHB and HB donor kidneys. However, NHB donor kidneys preserved by MP showed less DF than that reported in kidneys preserved by CS. This suggests that MP has a beneficial effect on ischemically damaged kidneys. The similar results observed with category 2 and category 3 NHB donors also suggest this effect. The high PNF rate emphasizes the need for viability tests that prevent the transplantation of nonviable organs. We conclude that MP alone is not sufficient to reduce DF and PNF rates in NHB donor kidneys.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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