Early hemodynamic effects after extended liver radiofrequency ablation

Abstract Background The purpose of the present study was to assess early intestinal and systemic hemodynamic effects after extended radiofrequency ablation (RFA) of the liver in terms of investigating their potential contribution to gut barrier disruption. Materials and methods Ten rabbits were assi...

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Bibliographic Details
Published in:The Journal of surgical research 2015-05, Vol.195 (1), p.204-210
Main Authors: Ypsilantis, Petros, DVM, PhD, Didilis, Vasilios, MD, PhD, Eleftheriadis, Savvas, MD, PhD, Lambropoulou, Maria, MD, PhD, Varsamis, Nikolaos, MD, Simopoulos, Constantinos, MD, PhD
Format: Article
Language:English
Subjects:
Ablation
Animals
Catheter Ablation - adverse effects
Female
Hemodynamics
Intestinal Diseases - etiology
Intestinal Diseases - pathology
Intestines - blood supply
Intestines - pathology
Liver
Liver - surgery
Postoperative Complications - etiology
Postoperative Complications - pathology
Postoperative Complications - physiopathology
Rabbits
Radiofrequency
Random Allocation
Reperfusion Injury - etiology
Surgery
Swine
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Summary:Abstract Background The purpose of the present study was to assess early intestinal and systemic hemodynamic effects after extended radiofrequency ablation (RFA) of the liver in terms of investigating their potential contribution to gut barrier disruption. Materials and methods Ten rabbits were assigned to two groups of five animals each and were subjected to either 30% liver RFA (group RFA-1) or sham operation (group sham-1). Blood flow rate at the superior mesenteric artery (SMA) was monitored for 90 min after operation. Ileal tissue was excised at 48 h for histomorphometric and histopathologic analysis. Eight pigs were assigned to two groups of four animals each and were also subjected to either 30% liver RFA (group RFA-2) or sham operation (group sham-2). A panel of systemic hemodynamic parameters was serially measured up to 90 min after operation. Results In group RFA-1, SMA blood flow rate was lower than that in group sham-1 throughout the study period. Intestinal mucosa atrophy and a deterioration of histopathologic profile were noted in group RFA-1. In group RFA-2, diastolic pulmonary artery pressure was lower (60–90 min), central venous pressure was gradually decreased, arterial pressure was higher (30–90 min), and systemic vascular resistance was higher (30–90 min) than those in group sham-2. No change was noted in the cardiac output. Conclusions In conclusion, SMA blood flow was reduced during the early post-RFA period, justifying an ischemic insult at the intestine. In addition, a gradual decrease of the preload was counterbalanced by an increase of systemic vascular resistance leaving the cardiac output unaffected.
ISSN:0022-4804
1095-8673
DOI:10.1016/j.jss.2014.12.003