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Biomedical subjects

M Bezzi

Publications and source records attributed to M Bezzi.

At least 37 records · Page 2Linked to original sources
PubMed1997

Ongoing prothrombotic state in the portal circulation of cirrhotic patients.

Portal thrombosis may complicate the clinical course of cirrhosis, but the pathophysiologic mechanism is unclear. Aim of the study was to evaluate the behavior of clotting system and endotoxemia in portal vein and in peripheral circulation of 11 cirrhotic patients undergoing transjugular port-systemic shunt (TIPS). Portal blood showed higher values of F1 + 2 [Median (range): 2.5 (1.1-5.3) vs. 1.1 (0.6-2.1) nM, p < 0.01], D-dimer [765 (184-1713) vs. 192 (64-813) ng/ml, p < 0.01] and endotoxemia [31 (16-47.2) vs. 13.7 (7.5-23.5) pg/ml, p < 0.01] than peripheral circulation. In the portal vein, all but one sample had F1 + 2 > 1.2 nM (upper limit of control values), all but one had D-dimer > 216 mg/dl (mean + 2 SD of controls) and 100% had values of endotoxemia > 9.6 pg/ml (upper limit of control values). Fibrinogen was lower in the portal circulation compared to peripheral circulation but the difference was not significant [85 (58-195) vs. 134 (75-244) mg/dl, p > 0.05]. Endotoxemia was directly correlated with F1 + 2 (Rho = 0.92 p < 0.006) and D-dimer (Rho = 0.93, p < 0.005). This study shows that an ongoing prothrombotic state is present in the portal circulation of cirrhotic patients and may play a pivotal role in the thrombotic episodes occurring in this clinical setting.

Adult↗
PubMed1996

Self-expanding stents in transjugular intrahepatic portosystemic shunt: experience with nitinol Strecker stents.

The aim of our study was to evaluate the performance and efficacy of a new self-expanding stent (nitinol Strecker stent) in the transjugular intrahepatic portosystemic shunt (TIPS) procedure. We have successfully placed 64 nitinol Strecker stents in 48 patients. The average portosystemic gradient decreased from 22 to 11 mm Hg. Balloon dilatation was necessary in 12 of 35 angiographically controlled cases at 5 days (34%), because of incomplete stent expansion, small thrombi within the stent or obstruction. At 1-6 months stent malfunctions occurred in 8 of 23 patients who underwent control angiography (34%) and at 6-24 months in 6 of 7 patients (85%). Rebleeding occurred in 2 of 39 patients (follow-up > 1 month) (5%) and temporary crises of de novo encephalopathy were observed in 11 of 48 patients (23%). Refractory ascites completely resolved in 4 of 6 patients (66%) and improved in the remaining 2 cases. Compared with other self-expanding stents, nitinol Strecker stents seem to be equally effective in TIPS; no increase in complication rate was observed, either clinical or stent-related.

Adult↗
PubMed1996

Hepatic encephalopathy after transjugular intrahepatic portosystemic shunt. Incidence and risk factors.

Forty-seven consecutive patients were prospectively evaluated to study the incidence of hepatic encephalopathy as well as modifications in the PSE index after TIPS. Various clinical, laboratory, and angiographic parameters were also recorded to identify risk factors for the development of post-TIPS hepatic encephalopathy (HE). Mean follow-up was 17 +/- 7 months. During follow-up, six patients died and one underwent transplantation. All other patients were followed for at least a year. Fifteen patients (32%) experienced 20 acute episodes of precipitated HE (hospitalization was necessary in 10 instances), and five patients (11%) presented a continuous alteration in mental status with frequent spontaneous exacerbation during follow-up. Both precipitated and spontaneous HE occurred more frequently during the first three months of follow-up. Moreover the PSE index was significantly worse than basal values one month after TIPS, thereafter returning to near basal values. HE was successfully treated in all patients but one who required a reduction in the stent/shunt diameter. Increasing age (>65 years) and low portacaval gradient (<10 mm Hg) were predictors of HE after TIPS. A gradual dilation of the stent/shunt should be performed to obtain a portacaval gradient >10 mm Hg to avoid an unacceptable rate of HE after TIPS.

Actuarial Analysis↗
PubMed1996

Meckel's diverticulum: imaging diagnosis.

Despite the availability and wide use of modern imaging techniques, the diagnosis of Meckel's diverticulum is difficult. The signs and symptoms vary from none to those of an acute abdomen or gastrointestinal bleeding. Findings on physical examination may be inconsistent because of the variable location of the diverticulum, and bleeding may occur with no appreciable physical findings. Finally, small diverticula are often concealed by overlying small-bowel loops on routine small-bowel barium studies. The purposes of this article are to review the use of available techniques for the imaging diagnosis of Meckel's diverticulum, to discuss the relative advantages and indications for the various procedures, and to emphasize the role each plays in specific clinical circumstances. The embryology, anatomy, and clinical presentation of Meckel's diverticulum are also briefly discussed.

Humans↗
PubMed1995

Complications after laparoscopic cholecystectomy. Coordinated radiologic, endoscopic, and surgical treatment.

The diagnostic and therapeutic approaches used for patients referred for bile duct injuries and other major complications after laparoscopic cholecystectomy (LC) were reviewed and the results of a coordinated radiologic, endoscopic, and surgical approach were assessed. From April 1991 to October 1993, 23 patients were observed. Seven patients had biliary strictures, five had biliary lesions, five presented with retained common bile duct (CBD) stones, and one had a minor cystic duct leak. Five patients had miscellaneous abdominal fluid collections; in addition, biloma or bile ascites were present in 10/23 cases. Correct definition of iatrogenic lesions was mainly made by endoscopic retrograde cholangiography (ERCP) (n = 15), associated in six cases also with percutaneous cholangiography (PTC). "Minimally invasive" treatment included the full range of endoscopic and interventional radiological procedures. Six patients with biliary strictures, one patient with a biliary lesion, all five patients with residual CBD stones, and four patients with abdominal collections were treated by "minimally invasive" techniques: Therefore, laparotomy was avoided in 70% of cases (16/23 patients). Open surgery was necessary in 7/23 patients (30%), because of ductal lesion (n = 4), ductal stricture by endoloop (n = 1), iliac artery injury (n = 1), and phlegmon of gallbladder bed (n = 1). It appears that careful assessment of complications after LC is mandatory and often requires the combined use of ERCP/PTC and cross-sectional imaging.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1995

Minimally invasive approach in Mirizzi's syndrome.

During a 4-year period (November 1990-September 1994), 1152 patients underwent laparoscopic cholecystectomy (LC). In five (0.4%) patients a cholecysto-choledochal fistula (Mirizzi's syndrome type II) was diagnosed and a minimally invasive treatment (endoscopy-laparoscopy-interventional radiology) was attempted. The first two cases were converted to open surgery probably because of severe anatomical distortion and inadequate confidence in performing a laparoscopic choledochal repair. The last three patients were successfully treated by minimally invasive procedures. These data indicate that a minimally invasive treatment can be safely attempted through a multi-disciplinary approach in Mirizzi's syndrome.

Aged↗
PubMed1995

Interventional radiology in gastrointestinal neoplasms.

Interventional radiology plays a significant role in different fields of gastrointestinal oncology. Percutaneous techniques can be used to diagnose and stage bile duct and pancreatic cancer. Palliation of esophageal tumors and malignant biliary obstruction may be achieved with interventional techniques, whereas curative attempts are directed mainly towards primary and secondary liver tumors. The therapeutic potential of interventional radiology is still expanding, as are all other forms of minimally invasive therapy. This article reviews the relevant contributions on this subject that have appeared in the past year. The introduction of new techniques is described, and the results of clinical studies are discussed.

Bile Duct Neoplasms↗
PubMed1995

Laparoscopic sonography during abdominal laparoscopic surgery: technique and imaging findings.

Laparoscopy is becoming the preferred approach for managing several abdominal disorders. The main limitations of laparoscopic surgery and diagnostic laparoscopy are the loss of the surgeon's tactile feedback and the inability to undertake a complete internal evaluation of solid parenchyma. Probes for laparoscopic sonography have been introduced to compensate for the limitations of laparoscopic surgery and to increase the diagnostic efficacy of laparoscopy [1]. In this article we describe our experience with laparoscopic sonography and illustrate the normal anatomic findings and some applications in biliary surgery and other abdominal laparoscopic procedures.

Abdomen↗
PubMed1995

[Long-term survival of patients with inoperable hepatocarcinoma, treated with interventional radiology].

Survival rates in untreated patients with unresectable HCC are rather disappointing. Our study was aimed at assessing long-term survival in the patients submitted to combined transarterial chemoembolization (TACE) and percutaneous ethanol injection (PEI). We treated 223 patients, but long-term follow-up is available in 143 of them only. Eighty-seven of 143 patients had Child's A liver cirrhosis, 45 had Child's B and 6 Child's C. Five patients did not have cirrhosis. Eighty-seven patients had single lesions--45 of them < 5 cm and 42 > 5 cm. Fifty-six patients had multiple/diffuse lesions. All patients underwent TACE while PEI was performed in selected patients with single or double lesions. Survival rates were calculated with the life-table analysis by Kaplan and Meyer. Follow-up was 1-72 months (median: 28 months). At 1, 3 and 5 years, the overall survival rates were 72%, 34.5% and 16.4%, respectively. The survival rates at 1, 3 and 5 years in single lesions < 5 cm were 90.4%, 52.1% and 34.8%, respectively, vs. 69.4%, 37.4% and 18.7% in lesions > 5 cm and 58.8%, 12.5% and 0% in multiple/diffuse lesions. In conclusion, the long-term results of the radiologic treatment of unresectable HCC are comparable with surgical results obtained in selected cases.

Actuarial Analysis↗
PubMed1994

[Carbon dioxide as an intra-arterial contrast agent in echography: a technic for its preparation and the preliminary results in assessing hepatocarcinoma vascularization].

This paper reports on an original method to prepare a contrast agent consisting of CO2 microbubbles to be injected i.a. during ultrasound examinations (ultrasound angiography-USA), whose value was investigated in the study of tumor neovascularity in HCC patients. Thirty-five HCC patients underwent USA. CO2 was drawn out from a gas container under pressure and, through a sublimation process, made available in predetermined quantities in test tubes. USA was performed during angiography in 9 cases and immediately before arterial chemoembolization in the other 26 cases. In 51 lesions vascularity was evaluated with conventional angiography, USA and lipiodol CT. USA demonstrated lesion hypervascularity in 91% of cases, as confirmed by lipiodol CT (88%), versus 72.4% of angiography. In 3 of 35 patients USA demonstrated 6 more lesions undetected by other modalities: two of them were proved to be HCC and adenomatous hyperplasia at percutaneous biopsy. USA is a cost-effective procedure, which is easy to perform during conventional angiography: it is more sensitive than conventional angiography in the study of lesion neovascularity and can help plan lesion management, anticipating the results of chemoembolization. The role of USA in the diagnosis and treatment of HCC is, however, still to be defined.

Aged↗
PubMed1994

[Is surgery duration really a complication factor?].

Of the numerous factors which may cause postoperative complications, some authors sustain that the durations of surgery plays a fundamentally important role. On the basis of a retrospective survey and analysis of cases operated, the authors observe that this factor, if considered alone, does not appear to cause a significant increase in septic complications, anastomotic dehiscence or mean postoperative hospital stay. Four homogeneous groups of patients were examined. Two groups included 100 who had undergone abdominal surgery which had not contaminated the peritoneal cavity. The other two groups included 150 patients who had undergone partially polluting colorectal surgery. The general preparation of patients was similar, with the exception of antibiotic prophylaxis. The mean time was calculated by analysing anesthesiological records. From an analysis of the most recent data, which are characterized by the absence of anastomotic dehiscence and operative mortality, it can be seen that the incidence of sepsis has fallen to 4% even if mean operating time was long. Mean postoperative hospital stay was also reduced from 17.3 days to 13 days. The prolongation of operating times does not depend on the complexity of surgery, intraoperative complications or the surgeon's inexperience, but may be the result of the meticulous implementation of procedures and steps taken to prevent complications which, given that they require extreme care and attention, necessarily contribute to increasing the duration of surgery. With regard to antibiotic prophylaxis and the duration of surgery, it was observed that if antibiotic prophylaxis preceded the operation by more than one hour, the incidence of sepsis was about 20%. If treatment coincided with the induction of anesthesia or the start of surgery, then the incidence of sepsis fell to 13%.(ABSTRACT TRUNCATED AT 250 WORDS)

Anti-Bacterial Agents↗
PubMed1994

[Transjugular intrahepatic portosystemic shunt (TIPS): indications and results after 22 months of experience].

December 1991 through November 1993, fifty-five patients underwent TIPS with the following indications: failed sclerotherapy or surgery (25 patients), bleeding from gastric varices (3 patients), patients waiting for liver transplantation (11 patients) and refractory ascites (9 patients). Seven patients were included in a randomized TIPS vs sclerotherapy trial. The average follow-up of living patients is 4.6 months (range: 1-16 months). The technical success rate was 100%. The portosystemic gradient decreased from 22 mmHg to 10.7 mmHg. After TIPS all patients were followed-up with endoscopic, angiographic and color Doppler examinations and underwent periodic clinical checks. Early (5-day) angiographic follow-up exams showed partial stent thrombosis in 5/32 cases (15.5%) and complete stent thrombosis in 3 cases (9.3%). Late angiographic follow-up exams (1-9 months) showed complete stent occlusion in 2 cases, stent stenosis in 8 cases and hepatic vein stenosis in 5 cases. At present, 37 patients are alive (67%); 5 patients have undergone liver transplantation (9%), and 13 patients died (24%)--3 within 48-72 hours after the procedure and 10 in 1-8 months. Five patients had recurrent bleeding (9%). Ascites was reduced or disappeared in 8/9 cases. Early clinical complications occurred in 12% of cases and were treated with medical therapy. Within one year, signs of encephalopathy developed in 13 patients (23%) and were successfully treated with medical therapy.

Adult↗
PubMed1993

[Biodegradable compression ring in intestinal anastomosis].

The Authors report their experience with the use of biofragmentable anastomosis ring ("Bowel Anastomosis Ring" B.A.R.--Valtrac): 34 patients underwent colic resection and bowel anastomosis by B.A.R. No complications related to the anastomosis were recorded. The ring was always discharged in the third postoperative week and the endoscopic follow up showed no late complications. It is concluded that B.A.R. is a safe technique and represents a good alternative to hand or mechanical anastomosis with a favorable cost/benefit ratio.

Aged↗
PubMed1993

[Metallic stents in benign biliary stenosis. A four-year follow-up].

From October 1988 to September 1989, 29 self-expanding biliary metallic stents were positioned in 18 patients with recurrent benign biliary strictures, who were no longer candidates to surgical repair and did not respond to percutaneous balloon dilatation. "Z" stent were used in 17 patients and a Wallstent in one case. At four years' follow-up (range: 39-50, average: 46 months), 10 patients remain asymptomatic, without signs of bile stasis (55.5%), five patients had recurrence of symptoms and were subsequently retreated (27.7%) and three patients died from severe underlying diseases, two of them with stent obstruction, one without signs of bile stasis. Recurrences were caused by stent obstruction in three cases. At four years' follow-up the overall patency rate is 68.7%. According to the type of stricture treated, patency is 100% in the group of patients with single CBD stenosis and in the patients with single anastomotic strictures, whereas in all patients with multiple or complicated strictures the stents completely occluded within 4-22 months.

Adult↗