No abstract

In split-liver transplantation, the entire portal flow is redirected through relatively smallfor-size grafts. It has been postulated that excessive portal blood flow leads to graft injury. In order to elucidate the mechanisms of this injury, we studied the hemodynamic interactions between portal veinand hepatic artery flow in an experimental model in pigs. Six whole pig liver grafts were implanted in Group 1 (n = 6) and six whole liver grafts were split into right and left grafts and transplanted to Groups 2 (n = 6) and 3 (n = 6), respectively. The graftto-recipient liver volume ratio was 1:1, 2:3 and 1:3 in Groups 1, 2 and 3 , respectively. Portal vein-and hepatic artery flows were measured with an ultrasonic flow meter at 60,120 and 180min after graft reperfusion. Portal vein pressure was also recorded at the same time intervals. Graft function was assessed at 3,6h and 12h, and morphological changes at 12h after reperfusion. Following reperfusion, portal vein flow showed an inverse relationship to graft size, while hepatic artery flow was reduced proportionately to graft size. The difference was significant among the three groups (P

Retention of surgical sponges is rare. They cause either an aseptic reaction without significant symptoms or an exudative reaction which results in early but nonspecific symptoms. Computed tomography is very useful for recognition of retained sponges. The appearance of retained sponges is widely variable. Air trapping into a surgical sponge results in the spongiform pattern which is characteristic but unfortunately uncommon. A low-density, high-density, or complex mass is found in the majority of cases, but these patterns are not specific. Sometimes, a thin high-density capsule may be seen. Rim or internal calcification is a rare finding. Finally, a radiopaque marker is not a reliable sign. Differentiation from abscess and hematoma is sometimes difficult.

No abstract

Cystic and cavitary lung lesions constitute a spectrum of pulmonary diseases diagnosed in both children and adults. We reviewed the CT findings of the most common cystic and cavitary lung lesions and we defined useful morphological criteria that will help radiologists to distinguish benign from malignant cavitary lesions. However, in many cases the considerable overlap in morphological features of benign and malignant cavities renders transthoracic needle biopsy necessary to establish the correct diagnosis.