Diagnostic role of colour Doppler US at 1-year follow-up after orthotopic liver transplantation.
OBJECTIVE
This paper discusses the role of colour Doppler ultrasound (CDUS) in the midterm follow-up of patients after orthotopic liver transplantation (OLT).


METHODS
We retrospectively studied 134 patients--102 men and 32 women, age range 21-68 years--who underwent liver transplantation between May 2006 and April 2007. In the first week after OLT, CDUS examination was performed daily in patients with anastomoses at a high risk of thrombosis, and on the basis of clinical and laboratory findings in other patients. After discharge, follow-up was performed 1, 3, 6 and 12 months after transplantation. Any new parenchymal focal lesion was studied by computed tomography (CT) and, where needed, biopsy.


RESULTS
CDUS identified the following complications: 22 biliary (B), nine vascular (V) and seven focal lesions (FL). Sensitivity, specificity, positive and negative predictive values and diagnostic accuracy were, respectively: 79.2%, 97.3%, 86.3%, 95.5%, 94% (B), 100%, 99.2%, 88.9%, 100%, 99.3% (V) and 100%, 96.9%, 42.8%, 100%, 97% (FL). CDUS also showed 16 blood collections and eight suspected biliary collections (four of which were confirmed by percutaneous puncture).


CONCLUSIONS
CDUS is an essential diagnostic tool in the follow-up of OLT. An early diagnosis of complications can improve graft integrity and patient survival.
Gazzera
C
C
Istituto di Radiologia Diagnostica ed Interventistica, A.S.O. San Giovanni Battista, Via Genova 3, Turin, Italy. Carlogazzera@inwind.it
Isolato
G
G
Stola
S
S
Avogliero
F
F
Ricchiuti
A
A
Gandini
G
G
D000328:Adult; D000368:Aged; D049448:Cholangiopancreatography, Magnetic Resonance; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D016031:Liver Transplantation / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D016019:Survival Analysis; D014057:Tomography, X-Ray Computed; D018615:Ultrasonography, Doppler, Color