Neurological complications of liver transplantation

Intraoperative Optic Nerve Sheath Diameter as a Predictor of Early Tacrolimus Neurotoxicity after Living Donor Liver Transplantation

BACKGROUND

During liver transplantation, graft reperfusion triggers cerebral hyperemia, increases intracranial pressure, and disrupts the blood-brain barrier, thereby increasing the risk for immunosuppression neurotoxicity. Therefore, we tested the intraoperative optic nerve sheath diameter (ONSD) for predicting tacrolimus neurotoxicity after liver transplantation.

BASIC PROCEDURES

We prospectively included 100 adult patients who underwent living donor liver transplantation. The ultrasonographic ONSD 5 min after reperfusion was used as the index test, whereas the occurrence of early tacrolimus neurotoxicity was used as the reference. The area under the receiver operating characteristic curve (AUROC) was used to estimate the ONSD prediction accuracy. We reported the specificity and sensitivity of ONSD 5 and 30 min after reperfusion. Cutoffs were derived from the ROC curves. In addition, we used regression to control for confounders while testing the association between the ONSD and tacrolimus neurotoxicity.

MAIN FINDINGS

The AUROC at T3 was 0.74 (95% confidence interval (CI), 0.63-0.85, P < 0.001). An ONSD of ≥6.4 mm at T3 had an 86% sensitivity (95% CI, 68%-96%) and 53% specificity (95% CI, 41%-65%). An ONSD of ≥6.4 mm at T3 had an adjusted odds ratio for tacrolimus neurotoxicity of 6.3 (95% CI, 1.9-21, P = 0.003).

CONCLUSIONS

This data indicates that intraoperative ultrasonic ONSD after reperfusion can predict tacrolimus neurotoxicity after liver transplantation.

TRIAL REGISTRATION

NCT03799770; registered on January 1st, 2019.

Neurological complications in pediatric liver transplant recipients

INTRODUCTION

There is paucity of data on neurological complications (NCs) and its predisposing factors, in pediatric liver transplant (PLT) recipients.

METHODS

Records of seventy-one children who underwent LT between October 2018 and November 2019 were reviewed. Patients were categorized into group A: with NC and group B: without NC in the post-LT period. Various risk factors contributing to NC were studied.

RESULTS

In total, 15 (21.1%) had NC (group A) and 56 (78.9%) had no NC in the post-LT period. NC included cerebrovascular accident (n = 1), seizures (n = 5; 4 generalized, 1 focal), central pontine myelolysis (CPM) (n = 1), diaphragmatic palsy (n = 2), peripheral neuropathy (n = 1), extrapyramidal movements (n = 3), and encephalopathy beyond 96 h (n = 2). The median onset of NC was at 8.5 days post-LT (1-58 days). Ten (66.7%) patients in group A had grades 2-4 hepatic encephalopathy (HE) prior to LT. Eight (14.3%) patients in group B also had pre-LT neurological issues including HE in six, epilepsy and spastic diplegia in one each. On univariate analysis, pre-existing HE, high PELD/MELD score, pre-LT ventilation, pre-LT infection, higher day 1 post-operative bilirubin (all p < .05), and higher tacrolimus were found to predict post-operative NC whereas on multivariate analysis, pre-LT HE was the only predictive factor. Median follow-up was 15.5 months. Four patients died in each group (survival log-rank p = .369). All the surviving patients in group A (n = 11) fully recovered from the NC.

CONCLUSION

Pre-transplant HE was the single most significant predisposing factor for post-LT neurological complications.

Liver transplantation nearly normalizes brain spontaneous activity and cognitive function at 1 month: a resting-state functional MRI study

To investigate the short-term brain activity changes in cirrhotic patients with Liver transplantation (LT) using resting-state functional MRI (fMRI) with regional homogeneity (ReHo) method. Twenty-six cirrhotic patients as transplant candidates and 26 healthy controls were included in this study. The assessment was repeated for a sub-group of 12 patients 1 month after LT. ReHo values were calculated to evaluate spontaneous brain activity and whole brain voxel-wise analysis was carried to detect differences between groups. Correlation analyses were performed to explore the relationship between the change of ReHo with the change of clinical indexes pre- and post-LT. Compared to pre-LT, ReHo values increased in the bilateral inferior frontal gyrus (IFG), right inferior parietal lobule (IPL), right supplementary motor area (SMA), right STG and left middle frontal gyrus (MFG) in patients post-LT. Compared to controls, ReHo values of post-LT patients decreased in the right precuneus, right SMA and increased in bilateral temporal pole, left caudate, left MFG, and right STG. The changes of ReHo in the right SMA, STG and IFG were correlated with change of digit symbol test (DST) scores (P < 0.05 uncorrected). This study found that, at 1 month after LT, spontaneous brain activity of most brain regions with decreased ReHo in pre-LT was substantially improved and nearly normalized, while spontaneous brain activity of some brain regions with increased ReHo in pre-LT continuously increased. ReHo may provide information on the neural mechanisms of LT' effects on brain function.

Postoperative cognitive dysfunction after liver transplantation

OBJECTIVE

Postoperative cognitive dysfunction (POCD) in liver transplant (LT) recipients is defined as a "more than expected" postoperative deterioration in cognitive domains, including short-term and long-term memory, mood, consciousness and circadian rhythm. It is diagnosed, after exclusion of other neurological complications, by using specific neuropsychological tests that need preoperative baseline. The aim of this systematic review was to assess the prevalence of POCD after LT and to analyze patients' symptoms, type and timing of assessment used.

METHODS

PubMed, MEDLINE and The Cochrane Li-brary were searched up from January 1986 to August 2014. Study eligibility criteria are as follows: prospective and retrospective studies on human adult subjects describing prevalence of POCD and/or its sequelae after LT episodes were included.

RESULTS

Eighteen studies were identified. The timing of testing for POCD may vary between different studies and within the single study, ranging from 0.5 to 32 weeks. POCD occurs in up to 50% of LT recipient.

CONCLUSION

Future studies should be focused on detecting preoperative and intraoperative factors associated to POCD in order to carry out appropriate strategies aimed at reducing this disabling health condition. Relationship between POCD and long-term outcome needs to be investigated.

Central nervous system complications after liver transplantation: common but mostly transient phenomena

Although central nervous system complications (CNSCs) are common after orthotopic liver transplantation (OLT), standardized prospective studies are still lacking. This prospective study was aimed at determining the incidence of CNSCs, describing their clinical presentations, and establishing predicting factors. One hundred thirty-six adult patients who underwent OLT at Hannover Medical School between December 2008 and June 2011 were included. Weekly examinations were performed by a neurologist during the hospital stay after OLT. Patient data, donor data, and operative and postoperative variables were collected. Patients with cerebral dysfunction after OLT underwent a diagnostic work-up, which included brain imaging and, if necessary, cerebrospinal fluid analysis. Patients with central nervous system (CNS) symptoms but negative imaging and cerebrospinal fluid results and patients with pontine myelinolysis or posterior reversible encephalopathy syndrome were placed in a metabolic-toxic CNSC group, and patients with strokes, intracranial hemorrhaging, or CNS infections were placed in a nonmetabolic CNSC group. Multiple regression analysis was used to identify independent risk factors for the development of metabolic-toxic CNSCs. After excluding two patients that died after OLT without regaining consciousness, forty-four (32.8%) patients developed CNSCs: 37 of these patients (27.6%) had metabolic-toxic CNSCs, and 7 (5.2%) had nonmetabolic CNSCs. Acute-on-chronic liver failure, the number of subsequent surgeries, and primary sclerosing cholangitis were identified as independent predictors for the development of metabolic-toxic CNSCs. Metabolic-toxic CNSCs were associated with prolonged hospital stays, and nonmetabolic CNSCs were associated with higher mortality. In conclusion, CNSCs are common and relevant complications after OLT. Patients after OLT, especially with risk factors, should undergo a regular standardized neurological examination that would allow early detection of these complications.

Postoperative delirium in the intensive care unit predicts worse outcomes in liver transplant recipients

BACKGROUND

Delirium is common in intensive care unit patients and is associated with worse outcome.

OBJECTIVE

To identify early risk factors for delirium in patients admitted to the intensive care unit following orthotopic liver transplantation (OLT).

METHODS

An observational study of patients admitted to the intensive care unit from January 2000 to May 2010 for elective or semi-elective OLT was conducted. The primary end point was delirium in the intensive care unit. Pre- and post-transplantation and intraoperative factors potentially associated with this outcome were examined.

RESULTS

Of the 281 patients included in the study, 28 (10.03%) developed delirium in the intensive care unit at a median of two days (interquartile range one to seven days) after OLT. According to multivariate analysis, independent risk factors for delirium were intraoperative transfusion of packed red blood cells (OR 1.15 [95% CI 1.01 to 1.18]), renal replacement therapy during the pretransplantation period (OR 13.12 [95% CI 2.82 to 72.12]) and Acute Physiologic and Health Evaluation (APACHE) II score (OR per unit increase 1.10 [95% CI 1.03 to 1.29]). Using Cox proportional hazards models adjusted for baseline covariates, delirium was associated with an almost twofold risk of remaining in hospital, a fourfold increased risk of dying in hospital and an almost threefold increased rate of death by one year.

CONCLUSION

Intraoperative transfusion of packed red blood cells, pretransplantation renal replacement therapy and APACHE II score are predictors for the development of delirium in intensive care unit patients post-OLT and are associated with increased hospital lengths of stay and mortality.

Impact of pretransplant hepatic encephalopathy on liver posttransplantation outcomes

Patients with cirrhosis commonly experience hepatic encephalopathy (HE), a condition associated with alterations in behavior, cognitive function, consciousness, and neuromuscular function of varying severity. HE occurring before liver transplant can have a substantial negative impact on posttransplant outcomes, and preoperative history of HE may be a predictor of posttransplant neurologic complications. Even with resolution of previous episodes of overt or minimal HE, some patients continue to experience cognitive deficits after transplant. Because HE is one of the most frequent pretransplant complications, improving patient HE status before transplant may improve outcomes. Current pharmacologic therapies for HE, whether for the treatment of minimal or overt HE or for prevention of HE relapse, are primarily directed at reducing cerebral exposure to systemic levels of gut-derived toxins (e.g., ammonia). The current mainstays of HE therapy are nonabsorbable disaccharides and antibiotics. The various impacts of adverse effects (such as diarrhea, abdominal distention, and dehydration) on patient's health and nutritional status should be taken into consideration when deciding the most appropriate HE management strategy in patients awaiting liver transplant. This paper reviews the potential consequences of pretransplant HE on posttransplant outcomes and therapeutic strategies for the pretransplant management of HE.

Neurological complications following pediatric liver transplant

OBJECTIVE

We studied neurological complications (NCs) after liver transplantation (LT) in children.

METHODS

We performed an institutional review board-approved retrospective review of patients with LT ≤21 years during a period of 30 years (1980-2010). NCs were classified as early (within 3 months post-LT) and delayed (beyond 3 months post-LT).

RESULTS

Of 65 children with LT, 20 (30.7%) had NCs; 16 were girls. Mean age was 11.8±5.9 years. Early NCs were found in 13.8% (9/65) of the patients: seizures in 7 and encephalopathy in 2. Abnormal neuroimaging findings were posterior reversible leukoencephalopathy syndrome (1), intracranial hemorrhage (1), mild cerebral edema (1), and bilateral basal ganglia T1W hyperintensities in magnetic resonance imaging (1). On follow-up, there were 3 deaths (unrelated to NCs). One with intracranial hemorrhage had residual hemiparesis and was taking a long-term antiepileptic drug. Late NCs are found in 16.9% (11/65) of the patients: seizures in 4, headache in 4, encephalopathy in 3 (1 had seizures in addition), and paresthesias caused by possible small-fiber neuropathy in 1. Abnormal neuroimaging findings were hypoxic-ischemic encephalopathy (1), encephalomalacia caused by old hemorrhage (1), and hyperintensity of the posterior periventricular white matter in magnetic resonance imaging (1). On follow-up, all of the patients survived; 1 had papilledema with secondary optic atrophy requiring optic nerve sheath fenestration and 1 needed long-term antiepileptic drug.

CONCLUSIONS

NCs are common in children after LT, seizures being the most common. In contrary to the previous studies, we found delayed complications more often than early complications. Early detection and appropriate management of NCs is important.

Multiple etiologies of axonal sensory motor polyneuropathy in a renal transplant recipient: a case report

INTRODUCTION

Neurological complications leading to morbidity and mortality are not frequent in renal transplant recipients. Here, we report a renal transplant recipient who presented with diminished strength in his limbs probably due to multiple etiologies of axonal sensorimotor polyneuropathy, which resolved with intravenous immunoglobulin.

CASE PRESENTATION

A 49-year-old Iranian male renal transplant recipient with previous history of autosomal dominant polycystic kidney disease presented with diminished strength in his limbs one month after surgery. Our patient was on cyclosporine A, mycophenolate mofetil and prednisone. Although a detected hypophosphatemia was corrected with supplemental phosphate, the loss of strength was still slowly progressive and diffuse muscular atrophy was remarkable in his trunk, upper limb and pelvic girdle. Meanwhile, his cranial nerves were intact. Post-transplant diabetes mellitus was diagnosed and insulin therapy was initiated. In addition, as a high serum cyclosporine level was detected, the dose of cyclosporine was reduced. Our patient was also put on intravenous ganciclovir due to positive serum cytomegalovirus immunoglobulin M antibody. Despite the reduction of oral cyclosporine dose along with medical therapy for the cytomegalovirus infection and diabetes mellitus, his muscular weakness and atrophy did not improve. One week after administration of intravenous immunoglobulin, a significant improvement was noted in his muscular weakness.

CONCLUSION

A remarkable response to intravenous immunoglobulin is compatible with an immunological basis for the present condition (post-transplant polyneuropathy). In cases of post-transplant polyneuropathy with a high clinical suspicion of immunological origin, administration of intravenous immunoglobulin may be recommended.

Analytic Review: Neurological Complications of Transplantation

Recipients of solid organ or hematopoietic cell transplants are at risk of life-threatening neurological disorders including encephalopathy, seizures, infections and tumors of the central nervous system, stroke, central pontine myelinolysis, and neuromuscular disorders—often requiring admission to, or occurring in, the intensive care unit (ICU). Many of these complications are linked directly or indirectly to immunosuppressive therapy. However, neurological disorders may also result from graft versus host disease, or be an expression of the underlying disease which prompted transplantation, as well as injury induced during radiation, chemotherapy, surgery, and ICU stay. In rare cases, neuroinfectious pathogens may be transmitted with the transplanted tissue or organ. Diagnosis may be a challenge because clinical symptoms and findings on neuroimaging lack specificity, and a biological specimen or tissue diagnosis is often needed for definitive diagnosis. Management is centered on preventing further neurological injury, etiology-targeted therapy, and balancing the benefits and toxicities of specific immunosuppressive agents.

Neurocognitive-neurological complications of liver transplantation: a review

Neurological complications are common after liver transplantation (LT) and they are associated with a significant morbidity. Long-term effects of LT on cognitive and psychological outcomes are not clear. The objective of this study was to summarize the present knowledge on the neurological and cognitive complications of LT, resulting from a systematic review of the literature in the last 10 years. Several studies have investigated the incidence and the pathophysiology of neurological complications; in contrast, the knowledge of cognitive and psychological status after LT is poor. Currently, the effect of LT on mental performance is debated. Some studies have shown an improvement of cognitive function after OLTX and, at the same time, a persistence of different cognitive deficits. In addition, the quality of life (QoL) and the psychological status after LT seem to improve but LT recipients have significant deficiencies in most QoL domains. Consequently, future studies are necessary in order to investigate cognitive alterations and QoL in LT recipients.

Headache in kidney transplantation

The aim of this retrospective study was to determine the relevance of the symptom “headache” in kidney transplanted patients, since few studies have considered headache as a clinically significant complication in this condition. A total of 83 consecutive kidney transplant patients underwent to neurological examination and a detailed headache history was taken. The headache history considered the period before kidney disease, during renal failure, during dialysis treatment and after transplantation. Diagnosis was made according to International Headache Criteria (ICDH-II) (2004). Our results reveal an occurrence of headache after kidney transplantation in 44.5% of the patients, which is higher than rates reported for the general population and in the only specific comparable study on liver transplant patients. These data suggest the need for prospective studies to explore the causal mechanisms by which headache develops with frequency in kidney transplant patients, and in particular to determine the role of immunosuppressive therapy.

Perioperative neurological complications after liver transplantation are best predicted by pre-transplant hepatic encephalopathy

INTRODUCTION

Liver transplant (LT) recipients are at significant risk for the development of neurological complications, such as altered mental status and seizures, in the postoperative period. Identifying accurate predictors of these events may allow optimal selection and preparation of candidates, and minimize risk after transplantation.

METHODS

One hundred and one consecutive adult LT recipients were evaluated retrospectively for neurological morbidity occurring in the first 30 days postoperatively. These events were analyzed in relation to specific predictive variables including preoperative complications of liver failure, such as hepatic encephalopathy (HE).

RESULTS

Median age was 50 years, 63% were male and hepatitis C was the most common indication for LT (n = 36). Median Child-Pugh score was 9 with 45% being Class C. Over half (n = 52) had experienced clinical HE prior to LT, while one quarter (n = 26) were encephalopathic at the time of LT. Neurological complications occurred in 31 patients in the postoperative period, with encephalopathy occurring in 28 and seizures occurring in 4; drug toxicity was responsible for neurological morbidity in 12 patients (39%). Length of hospital stay was significantly prolonged (median 19 vs. 12 days, P = 0.005) and all mortality (n = 3) occurred in those with neurological complications. There was no association between etiology of liver failure and complications; logistic regression identified active preoperative HE as the strongest predictor of postoperative morbidity (OR 10.7 95% CI 3.8-29.9).

CONCLUSION

Neurological events, manifesting most often as encephalopathy, occurred in almost one-third of patients after LT. Those suffering from HE at the time of LT may be more vulnerable to the metabolic stresses of surgery and the neurotoxicity of the drugs used, and were at highest risk for such complications.

Neurologic complications in adult living donor liver transplant recipients

BACKGROUND

Neurologic complications (NC) after liver transplantation are not uncommon, with serious complications such as central pontine myelinolysis (CPM), often causing disability.

OBJECTIVE

We investigated the incidence and features of NC following liver transplantation in adult recipients.

PATIENTS AND METHODS

We retrospectively reviewed the medical records of 319 adult patients who underwent liver transplantation between January 2004 and May 2005 at the Asan Medical Center.

RESULTS

Neurologic complications developed in 49 of 319 patients (15.4%). Although most of these complications were minor, including tremor and foot drop, three patients developed CPM, and one each developed posterior leukoencephalopathy, cerebral hemorrhage, and cerebral infarction. One-yr survival rates were 95.9% in patients without NC and 83.7% in patients with NC (p = 0.004). Hospital stay was prolonged in patients with NC. Graft-to-recipient body weight ratio (GRWR) did not affect occurrence of NC.

CONCLUSIONS

Neurologic complications were not uncommon in liver transplant recipients. These complications contributed to prolongation of hospital stay, increased in-hospital mortality, and decreased graft and patient survival. Every effort should be made to prevent NC, as well as to detect and treat them as soon as possible.

Phenomenology and emotional impact of neuropsychiatric symptoms in orthotopic liver transplant for hepatocellular carcinoma

BACKGROUND

Few studies have focused on neuropsychiatric symptoms like hallucinations or delusions occurring in the early posttransplant period. The aim of this study was to estimate the percentage of patients reporting neuropsychiatric symptoms in the immediate postoperative phase, to describe the phenomenology, and to evaluate the emotional impact of such disorders.

METHOD

We studied 94 consecutive patients who underwent orthotopic liver transplant (OLT) for hepatocellular carcinoma at least 30 days prior. The presence of neuropsychiatric symptoms were retrospectively evaluated through a semistructured interview.

RESULTS

Overall 49 patients (52%) reported various postoperative neuropsychiatric symptoms. None of the demographic and clinical variables showed significant associations, except for barbiturate administration; patients using barbiturates showed a lower percentage of neuropsychiatric symptoms. It was a time-limited phenomenon that in most cases resolved by day 7 after transplantation. Interestingly, the most frequent emotion perceived was surprise and not fear; a nontrivial amount of patients reported happiness, while many patients reported no emotion.

CONCLUSIONS

The results of this study suggested the usefulness of a registry of the neurological and psychiatric complications after OLT that may help to clarify the pathogenic mechanisms of such complications and implement uniform protocols of prevention and treatment. In fact, better knowledge of the phenomenology of neuropsychiatric symptoms in OLT recipients could allow easier symptom recognition and therapy adjustments on the basis of the emotional impact of such symptoms on patients, family, and caregivers, as well as increase patients' awareness and capability to face this experience.

Avoiding calcineurin inhibitors in the early post-operative course in high-risk liver transplant recipients: The role of extracorporeal photopheresis

The aim of this work is to report on the results of a single-center, prospective study on the feasibility of calcineurin-inhibitor (CNI)-staggered immunosuppression by use of extracorporeal photopheresis (ECP) in liver transplant (LT) recipients at risk of renal and neurological complications. Patients were matched on a 1:1 basis with historical controls on standard CNI immunosuppression. ECP patients were treated with ECP plus antimetabolites and/or steroids, while CNIs were withheld until clinically indicated. Thirty-six patients were evaluated: 18 ECP patients and 18 controls. ECP was tolerated in 100% of cases. CNI were introduced at a median of 8 days (4-55) in 17 ECP patients, while one patient was on a fully CNI-sparing regimen 22 months after LT. Acute rejection occurred in 27.7% patients in ECP (5/18) versus 16.7% in controls (3/18) (P = ns) with a shorter time to rejection in ECP (36 +/- 31.3 days vs. 83.6 +/- 65.6 days; P = ns). All rejection episodes were amenable to medical treatment. Neurological and renal complications occurred in 22.2% (4/18) of patients in either group, but led to in-hospital mortality in 3 patients among controls versus 1 in ECP (P = ns). One-, 6-, and 12-month survival rates were 94.4, 88.1, and 88.1% in ECP versus 94.4, 77.7, and 72.2% among controls (P < 0.0001). ECP seems to allow for management of high-risk LT recipients in the early post-transplant course and reduction of CNI-related mortality. Continued data validation is favored to assess the impact of ECP on long-term graft and patient survival.

Neuropsychiatric complications after liver transplantation: role of immunosuppression and hepatitis C

Neuropsychiatric complications are an important source of morbidity following orthotopic liver transplantation. Etiology of liver disease and type of immunosuppression are possible related factors. The aim of this study was to describe the prevalence of neuropsychiatric complications after liver transplantation, the role of immunosuppression, and the association between these and specific liver diseases such as hepatitis C. One hundred twenty-eight patients with liver transplants were studied. Tacrolimus was the primary immunosuppressant in 101 patients and cyclosporine in 27 patients. Seventy-five complications in 49 patients (38.2%) were reported. In 43 patients, the etiology was associated with immunosuppression: 36 on tacrolimus and 7 on cyclosporine (P = 0.34). Seventeen and four-tenths percent of patients with hepatitis C and 4.6% of patients without hepatitis C developed depression (P = 0.02). There is no difference between types of primary immunosuppression and neuropsychiatric complications. There is a significantly greater incidence of depression in patients transplanted for hepatitis C.

EFNS guidelines on management of neurological problems in liver transplantation

Neurological impairment after orthotopic liver transplantation (OLT) is common and represents a major source of morbidity and mortality. The diagnosis and management of neurological problems occurring after OLT are difficult and evidence-based guidelines for this task are currently lacking. A Task Force was set up under the auspices of the European Federation of Neurological Societies to devise guidelines to prevent and manage neurological problems in OLT. We selected six major neurological problems and approached them combining an evidence-based scientific literature analysis with a search of consensus by means of a Delphi process. Search results were translated into a series of recommendations constituting a basis for better care of patients with neurological complications after OLT.

A model to predict the development of mental status changes of unclear cause after liver transplantation

Postoperative mental status changes are common after liver transplantation (LT). A clear cause of these mental status changes cannot be identified in a significant proportion of patients. In adult liver transplant recipients, our goals are to: (1) identify independent predictors for the development of post-LT mental status changes of unclear cause and (2) derive a practical formula to predict the risk for developing this complication by using simple clinical parameters. Eligible patients had documented mental status changes of at least 3 days' duration, occurring within 1 month of LT. Exclusion criteria were known structural brain disorders, major organ dysfunction, or metabolic causes of altered mentation. Age- and sex-matched controls were liver transplant recipients without post-LT neurological sequelae. Data were collected on preoperative, intraoperative, and postoperative variables. Univariate and multivariate analyses were performed to detect factors predictive of the development of post-LT mental status of unclear cause. There were 40 cases and 40 controls. Independent predictors of mental status changes of unclear cause included alcoholic and metabolic liver diseases; pre-LT mechanical ventilation; Model for End-Stage Liver Disease (MELD) score greater than 15; and nonelective LT. Using these four preoperative factors, a simple predictive rule was developed. Risk for developing altered mental status of unclear cause after LT was 78% to 89% if all four predictors were present versus 0.8% to 2.4% if no predictors were present. In conclusion, alcoholic and metabolic liver diseases, pre-LT mechanical ventilation, MELD score greater than 15, and nonelective LT are independent predictive factors for post-LT altered mental status changes of unclear cause. A simple model can be used to calculate the risk for developing altered mental status post-LT.

Psychological assessment and care of organ transplant patients

Organ transplant has been developed in animal models over the past 100 years. The major limiting factor in transplant medicine is the shortage of donor organs. This shortage creates pressure for fair and efficient allocation of organs, with expectations that those involved in transplantation will strive to achieve optimal outcomes and ensure just access. This article reviews the major types of transplants and the illnesses and behavioral comorbidities that lead to these procedures, the psychological assessment of transplant candidates, the adaptive tasks required of the transplant recipient at various stages of the transplant process, and relevant psychological interventions. Liaison with others on the transplant team and ethical issues of concern to psychologists who work with transplant patients, including living organ donors, are also discussed. Finally, new developments in transplant and suggestions for future psychological research in organ transplant are presented.

Severe axonal polyneuropathy after a FK506 overdosage in a lung transplant recipient

FK506-induced polyneuropathies are rarely encountered. We report a case of axonal sensorimotor polyneuropathy in a lung transplant recipient that occurred during a FK506 overdosage. Onset was acute in the form of severe areflexic tetraparesis and resolution was observed after reduction of dosage. Because of increasing use of FK506 in solid organ transplantation, caution should be paid with FK506 dosage monitoring in cases of peripheral nervous system symptoms.

Neuropsychiatric complications of liver transplantation

Liver transplantation (LT) is the best treatment for end-stage liver diseases but it entails a high incidence of neuropsychiatric complications. These may be related to the operation or occur postoperatively, usually within the first month. The occurrence of neurological problems after LT increases the risk of mortality. The etiology of such complications is various, often multifactorial, immunosuppression being one of the most important causes. Immunosuppressive drugs may cause a wide spectrum of neuropsychiatric complications--mainly affecting the CNS--ranging from mild to severe disorders. A survey of the most frequent disorders is presented. In the management of liver-transplanted patients, the awareness of potential neurological and psychiatric problems is crucial for patients' survival, since it assists clinicians in prevention, prompt diagnosis, and treatment.

Long-term care of the liver transplant recipient

Many liver transplant recipients are now reaching survival beyond 5 years from the liver transplant procedure, and many others are alive more than a decade from acquiring their new liver. Orthotopic liver transplant recipients enjoy the benefits of normal liver function, but a variety of metabolic and other medical problems often develop that require diagnosis and adequate management. These problems include hyperlipidemia, obesity, diabetes mellitus, renal disfunction, arterial hypertension, bone disease and neuropsychiatric syndromes. The gastroenterologist, internist, or local family physician is frequently called on to identify and treat these postoperative complications in conjunction with physicians at the transplant center.

[Neurologic disorders in patients submitted to liver transplantation: analysis of 30 consecutive cases]

Neurologic complications are important source of morbi-mortality, in liver transplantation. They result from previous factors, alterations during the surgical procedure, effects from immunosuppressor drugs, coagulopathy and infections. We analyzed, retrospectively, the chronology, causes, and frequencies of neurologic alterations in thirty adult patients submitted to liver transplantation, and our results differ slightly from those registered in other series.