Solvent detergent vs. fresh frozen plasma in cirrhotic patients undergoing liver transplant surgery: a prospective randomized control study.

BACKGROUND: Although orthotopic liver transplantation (OLT) is nowadays considered standard practice at experienced centres, it can still be affected by a significant risk of massive bleeding and its related complications. Solvent/detergent plasma (S/D Plasma) has been proposed as an alternative to fresh frozen plasma (FFP) to curtail such complications. This study aimed at evaluating the efficacy of S/D Plasma in OLT patients by comparing it to FFP. MATERIALS AND METHODS: Sixty-three OLT patients were randomized into two groups depending on whether they were transfused with FFP or S/D plasma. A thromboelastography-based protocol aimed at achieving and maintaining predetermined coagulation goals was used to guide plasma transfusions. At the beginning and the end of surgery, standard laboratory coagulation tests were performed together with the assessment of the VII, VIII, V, XII factors and S protein blood levels. RESULTS: The two study groups equally achieved the thromboelastography goals but with a reduced amount of transfusions in the S/D plasma group (P < 0.0001). At the end of surgery, factors V and XII and S protein blood levels were lower in the S/D plasma patients who also showed lower INR, aPTT and antithrombin III levels. CONCLUSION: In cirrhotic patients undergoing OLT, the use of S\D plasma associated with thromboelastography allows the same clinical results but with a significant reduction in the amount of plasma transfusions.

Transcranial doppler sonography is useful for the decision-making at the point of care in patients with acute hepatic failure: a single centre's experience.

Acute hepatic failure (ALF) is an uncommon disease characterized by a rapid deterioration of the hepatic function with severe derangements of the mental status in previously healthy subjects due to massive hepatocytes necrosis. Neurological impairment, due to intracranial hypertension and cerebral ischemia, is a key factor because it is a main criterion to decide when to proceed to liver transplantation, which is only treatment for these patients. Therefore, neurological monitoring holds an essential role in the clinical management of ALF patients but it needs to be performed at the point-of-care in the majority of the cases as such critically ill patients cannot be moved away from the ICU because they frequently need continuous hemodynamic, ventilatory and renal support. We herein report and discuss our experience relating to the use of transcranial sonography as a neuro-monitoring tool in ALF patients. In our series this technique allowed a repeatable and reliable non-invasive assessment of cerebral blood flow changes at the bedside thus avoiding the complications associated with the use of an intracranial probe to measure intra-cranial pressure and making it possible to correctly evaluate the timing and feasibility of liver transplantation.

Measurement and knowledge of intra-abdominal pressure in Italian Intensive Care Units.

BACKGROUND: With this survey, we aimed at investigating the knowledge, recognition and management of intra-abdominal pressure (IAP) and abdominal hypertension (IAH) in Italian Intensive Care Units. METHODS: A questionnaire was sent to the ''Intensive Care Unit lead physician'' of 114 italian hospitals. RESULTS: One hundred fourteen questionnaires were sent, and 77 (67.5%) of them were returned completed. IAP was measured in 51 Units (66.3%). The most frequent reasons for not measuring IAP were the lack of a specific IAP monitoring kit (34.6%) and not knowing how to make the measurement (23.0%). Urinary bladder pressure was the only method used to measure IAP, the most frequent timing for IAP measurements was once every 4 h. An IAP value of 15 mmHg was considered to be the threshold for IAH in 33.4% of the cases, whereas in 31.4% of cases it was 20 mmHg. The presence of risk factors for IAH (64.7%) and a previous urgent surgery (21.5 %) were indicators of IAP monitoring. Diagnosis of IAH prompted a surgical consultation and evaluation, also in view of a possible abdominal decompression in 64.7 % of cases. More than half (54.9%, n=28) of the 51 ICUs where IAP was measured reported to be unaware of the World Society of the Abdominal Compartment Syndrome. CONCLUSION: Italian intensive care unit physicians show a certain interest towards IAP monitoring and its implications in the management of critically ill patients. However, IAP, IAH and abdominal compartment syndrome still require greater basic understanding.

Colistin in combination with rifampin and imipenem for treating a blaVIM-1 metallo-beta-lactamase-producing Enterobacter cloacae disseminated infection in a liver transplant patient.

A case of bla(VIM-1) producing E. cloacae disseminated infection in a patient submitted to orthotopic liver transplantation is described. Synergism between colistin, rifampin and imipenem was studied in vitro and this combination of three drugs was used to treat E. cloacae infection. The synergistic activity of this combination was demonstrated showing an increased activity of the serum bactericidal activity in comparison with the bactericidal activity of the serum taken during the previous therapy.

Colistin, meropenem and rifampin in a combination therapy for multi-drug-resistant Acinetobacter baumannii multifocal infection. A case report.

A 16 year-old girl underwent a multifocal (lungs, skin, soft tissues) infection due to multiresistant Acinetobacter baumannii after a car crash. To treat such a severe disease we used a combination therapy of colistin (2 millions Units twice/day), rifampicin (600 mg/day), meropenem (1 g 3 times a day) after a synergistic activity test was performed (checkerboard method on Mueller-Hinton broth and 5x10(5) cfu/mL inoculum). After 24 days, when a significant clinical improvement was gained, the 3-drugs combination therapy was replaced with i.v. levofloxacin 500 mg twice/day but, after 10 days of quinolones therapy, fever started again and the same multidrug resistant (MDR) A. baumannii was isolated from the skin grafts, central venous catheter tip and bronchial alveolar lavage. A combination therapy with colistin and meropenem was therefore started and definitive defervescence was obtained after 10 days. This therapy was continued for 70 days even if the patient was apyretic because A. baumannii was still present in the skin secretions. After 109 days of hospitalization in our intensive care unit, the patient was transferred to a rehabilitative unit. This case shows how useful is, in selected cases, rediscovering old antibiotic drugs, specially when they are adopted as a combination therapy, and highlights the importance of the clinical microbiological laboratory as it may help clinicians in choosing the best drugs combination.

Fast track in liver transplantation: 5 years' experience.

BACKGROUND AND OBJECTIVE: Reducing postoperative mechanical ventilation in patients undergoing liver transplantation may have clinical and organizational advantages. On the basis of our experience, we here evaluate the possibility of practising immediate tracheal extubation in the operating theatre. METHODS: In this prospective study, patients consecutively undergoing liver transplantation between 1 June 1999 and 31 May 2004 were extubated in the operating theatre at the end of surgery on the basis of standardized and universally accepted criteria, under conditions of haemodynamic and metabolic stability. RESULTS: Two hundred and seven of the 354 patients (58.5%) were extubated immediately after the completion of the surgical procedure (mean time between end of surgery and extubation: 0.4 +/- 1.4 min); two were re-intubated. In the last of the 5 yr of the study, the percentage of immediate extubations increased to 82.5%. During the study period, there was a progressive increase in the number of immediate extubations per individual member of the team of anaesthetists. The pre-transplant Child-Pugh severity of the underlying liver disease did not predict rapid extubation, but the Model for End-stage Liver Disease score of < 11 did (receiver operator characteristic area under the curve = 0.61; P < 0.05). CONCLUSIONS: Immediate extubation after liver transplantation is possible in a substantial percentage of cases; confidence, habit and a spirit of emulation are decisive factors in encouraging anaesthetists to extend this practice to the largest possible number of patients. A successful immediate extubation may be an important indicator of perioperative quality of care in liver transplantation.

Pancreas transplantation: problems and prospects in intensive care units.

AIM: The aim of this study is to describe personal experience in the intensive management of patients with severe diabetes undergoing pancreas transplantation. METHODS: Clinical records of subjects consecutively undergoing an isolated or combined pancreas transplant have been examinated. RESULTS: During the considered period, 10 patients received an isolated pancreas transplant and 43 a simultaneous kidney-pancreas transplantation (SPKT), including 6 using a kidney from a living donor. The mean stay in the Intensive Care Unit (ICU) was 4.7 days: 52 patients (98.2%) were transferred to the Surgical Department, whereas one (1.8%) belonging to the SPKT group died with a non-functioning graft. Ten patients (18.6%) were re-admitted because of the onset of late complications, including one SPKT who died of sudden cardiac death with functioning grafts. Arterial hypertension appeared in 51% of the recipients, and 5.6% experienced at least one hypotensive episode. Cardiac rhythm alterations were diagnosed in 5 subjects (9.4%), and myocardial ischemia in 9 (17%). CONCLUSIONS: Pancreas transplantation is a therapeutic option that can improve patients' quality of life by also slowing down the evolution of diabetes; however, it is important to bear in mind the associated risks. The best results are obtained in patients in whom the disease has not already seriously impaired the function of the various target organs.

Intraabdominal pressure in liver transplant recipients: incidence and clinical significance.

BACKGROUND: The incidence and clinical relevance of increased intraabdominal pressure after orthotopic liver transplantation (OLT) has not yet been evaluated despite the finding that occurrence of this condition in postsurgical critically ill patients may impair various organ functions. The aim of this study was to assess whether the occurrence of abdominal hypertension among a population of OLT recipients was an important cofactor producing early postoperative complications. METHOD: This prospective clinical study measured abdominal pressure every 6 hours during the intensive care unit (ICU) stay using the urinary bladder method. A value of >/=25 mm Hg was considered high. Hemodynamic status was simultaneously evaluated and renal function assessed based on the hourly urinary output, and by calculating serum creatinine on postoperative days 2 and 4. Renal failure was defined as a serum creatinine level of >1.5 mg/dL, or an increase in peak of >1 mg/L within 72 hours of surgery. The filtration gradient and patient outcomes were also considered. RESULTS: Intraabdominal hypertension was observed in 32% of cases. The subjects displaying high IAP showed significantly lower artery pressure values (P <.01), but did not differ in terms of central venous pressure or cardiac output. High intraabdominal pressure was more frequently associated with renal failure (P <.01), a lower filtration gradient (P <.001), delayed postsurgical weaning from the ventilation (P <.001), and increased ICU mortality (P <.05). A receiver operator characteristic curve analysis showed that the critical IAP values, namely those with the best sensitivity/specificity, were 23 mm Hg for postoperative ventilatory delayed weaning (P <.05), 24 mm Hg for renal dysfunction (P <.05), and 25 mm Hg for death (P <.01). CONCLUSIONS: Abdominal hypertension occurs frequently after OLT and may be associated with a complicated postoperative course.

Very early tracheal extubation without predetermined criteria in a liver transplant recipient population.

This study of all patients undergoing orthotopic liver transplantation (OLT) at our center between January 1997 and December 1999 evaluated the feasibility and safety of very early tracheal extubation without previous selection. Anesthetic management was the same in all cases, and tracheal extubation was performed on the basis of standardized criteria routinely adopted in operating rooms throughout the world, i.e., no residual curarization or anesthetic action, ability to swallow efficiently, and stable hemodynamics. One hundred sixty-nine patients underwent 181 OLTs during the study period. Tracheal extubation was performed within 3 hours of surgery in 115 cases, 8 hours in 19 cases, and 8 to 24 hours in 10 cases. In 36 cases, artificial ventilation was required for more than 24 hours or weaning was not possible. One patient died of primary graft nonfunction within 24 hours and was excluded from the analysis. The feasibility of early extubation was influenced by the amount of intraoperative transfused blood; efficacy of kidney, cardiac, and pulmonary function; and presence of encephalopathy (P <.001). No correlation was found with age or pre-OLT severity of hepatic disease, and the postoperative period was not compromised by early weaning. Very early extubation was feasible and safe in a large number of unselected transplant recipients, thus suggesting that the definition of early tracheal extubation should be changed from 8 to 3 hours after surgery.

[Prevention of mycotic infections in liver transplant recipients: comparison of two chemoprophylactic protocols]. / Prevenzione delle infezioni micotiche nei pazienti sottoposti a trapianto epatico: confronto tra due protocolli di chemioprofilassi.

BACKGROUND: The aim of the study was to compare and evaluate the efficacy of two chemoprophylactic protocols against mycotic infections in a liver transplant recipients population. DESIGN: single-blind, randomized. SETTING: Liver transplant Center of a National Health System teaching hospital. METHODS: Eighty-eight consecutive patients submitted to liver transplantation were enrolled in the study. Immediately before surgery they were randomized to receive sequential treatment with intravenous liposomal amphotericine B + oral itraconazole or intravenous fluconazole + oral itraconazole. Intravenous drugs were administered in the first postoperative week, and oral treatments for the following three weeks. In addition to analyzing the frequency and incidence of colonization, local and disseminated infection of mycotic origin, the causes of death and the possible risk factors for mycotic disease have been examined. RESULTS: Eighty-five patients completed the study. No significative difference was evident in the two groups as regards to single organ and systemic fungal infection rate. Two out of a total of 5 deaths were related to mycotic disease. Pre-transplant fungal colonization, more severe liver disease indicating the transplant procedure and the rejection of the graft were all risk factors for the development of mycotic infection. CONCLUSIONS: The two protocols used in the study showed and equal efficacy in preventing fungal infections in liver transplant recipients.

[Blood coagulation monitoring during liver transplantation: Sonoclot analysis and laboratory tests]. / Monitorizzazione della coagulazione in corso di trapianto di fegato: validazione dell'analisi tromboelastografica "Sonoclot" attraverso le indagini di laboratorio.

BACKGROUND: Aim of this paper is to validate blood coagulation data obtained using the Sonoclot thromboelastographic analyser (Sienco Inc., Morrison, USA) by means of standard laboratory tests during orthotopic liver transplantation (OLT). DESIGN: comparative study between laboratory data and Sonoclot analysis on simultaneously collected blood samples. SETTING: National Health System Liver Transplantation Center. PATIENTS: fifty-one patients, both males and females, affected by terminal hepatic disease submitted to OLT were enrolled in the study. DATA COLLECTION: simultaneous blood samples were collected during the pre-anhepatic, anhepatic and post-reperfusion phases of OLT; coagulation status was assessed by means of either standard Laboratory tests (INR, aPTT, Fibrinogen, PLT, D-Dimer) and Sonoclot analyser data (SonACT, Rate, Time to Peak, Downward Deflection); a statistical analysis was performed (Pearson s chi(2) test). RESULTS: A statistically significative correlation between the analysed data was found. The Sonoclot analyser was useful in identifying platelets dysfunction and was more sensitive to detect fibrinolysis. CONCLUSIONS: The Sonoclot thromboelastographic analyser is a reliable device for monitoring coagulation during OLT.

[Early tracheal extubation ofter orthotopic liver transplantation]. / Estubazione tracheale precoce dopo trapianto ortotopico di fegato.

BACKGROUND: To evaluate an early tracheal extubation feasibility in previously unselected orthotopic liver transplantation (OLT) patients. DESIGN: retrospective analysis. SETTING: National Health System Intensive Care Unit. PATIENTS: all the patients who underwent OLT during 1997 at our institution were evaluated. The anesthestic management was the same for all of them and a veno-venous bypass was always used during the anhepatic phase. Tracheal extubation was performed when metabolic and haemodynamic parameters were stable; the following extubation criteria were also considered: no residual curarization, normocarbia, ability to keep the airway patent, good respiratory drive, ability to carry out simple orders. No pre- or intraoperative criteria, as previously reported in the literature for OLT patients, were followed to perform tracheal extubation in the postoperative period. RESULTS: During 1997 forty OLTs were performed in 38 patients. Twenty-eight patients were successfully extubated within 3 hours from the end of the surgical procedure; three patients were extubated within 6 hours and three within 24 hours from the end of surgery; four patients needed more then 24 hours of ventilation or were impossible to wean. No patient was re-intubated. A correlation appeared evident between early extubation and the amount of the transfused red cell units, kidneys and lungs function, cardiovascular efficiency; no correlation emerged with patients age or the pre-transplant severity of the hepatic disease. CONCLUSIONS: To perform a safe early tracheal extubation in previously unselected OLT patients is feasible and it can be carried out in a wide number of them. The previously reported timing characterizing as "early" a tracheal extubation should be moved from 8 to 3 hours.

[Neuroendocrine response in surgery: comparison between inhalation anesthesia (isoflurane) and intravenous anesthesia (propofol)]. / Risposta neuroendocrina in chirurgia: confronto fra anestesia inalatoria (isoflurane) ed anestesia endovenosa (propofol).

The objectives of the study: 1) comparison between the two anesthesiological techniques both of which were applied to the various surgical groups (patients undergoing emergency surgery for abdominal pathologies and patients undergoing bone marrow biopsy); 2) a comparison between pre- and intraoperative stress levels. The experimental design consists of a comparative survey aimed at ascertaining the existence of statistically significant differences in pre- and intraoperative hormone levels (objective 1) and differences in hormone profiles depending on the anesthesiological technique used (objective 2). Patients were artificially ventilated; intraoperative monitoring included: automatic non-invasive AP every 3 minutes; cardiac monitoring; ETCO2; SaO2; all patients showed a normal postoperative evolution. A total of 30 patients were included in the study (mean age 34 years; ASA 1-3) 14 of which underwent bone marrow biopsy and 16 emergency surgery for abdominal pathologies; patients with hormonal pathologies or receiving treatment with drugs capable of influencing hormone response were excluded from the study.