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T Sauerbruch

Publications and source records attributed to T Sauerbruch.

At least 19 recordsLinked to original sources
PubMed2003

Piperacillin-tazobactam is more effective than ceftriaxone plus gentamicin in febrile neutropenic patients with hematological malignancies: a randomized comparison.

GOALS: Efficacy and costs of empirical antibacterial therapy in febrile neutropenic patients are important issues. Several strategies have been reported to be similarly effective: monotherapy with cefepime, ceftazidime or a carbapenem or duotherapy with an antipseudomonal beta-lactam antibiotic or ceftriaxone in combination with an aminoglycoside. Piperacillin-tazobactam monotherapy is promising, but its role in this setting still has to be defined. PATIENTS AND METHODS: Of 212 consecutive febrile episodes in 130 neutropenic patients with hematological malignancies randomized to receive either piperacillin-tazobactam (4.5 g every 8 h; group A) or ceftriaxone (2 g once daily plus gentamicin 5 mg/kg once daily; group B), 183 episodes (98 group A, 85 group B) were evaluable for response. RESULTS: Defervescence within 72 h without modification of the antibiotic therapy was achieved in 56/98 episodes (57.1%) in group A and in 30/85 (35.3%) in group B (P=0.0047). If fever persisted, teicoplanin plus gentamicin (group A) or teicoplanin plus ciprofloxacin (group B) were added. All patients still febrile then received meropenem, teicoplanin and amphotericin B. With these modifications of antibiotic therapy, 89.8% of patients in group A had responded at 21 days but only 71.8% in group B (P=0.005). The mean total antibiotic drug cost in group A was only 39.4% of that in group B (euro 445 versus euro 1129; P=0.010). CONCLUSION: Piperacillin-tazobactam monotherapy is significantly more effective and cost-efficient than ceftriaxone plus gentamicin as first-line therapy in febrile neutropenic patients with hematological malignancies.

Adolescent↗
PubMed2003

Superior virological efficacy of ritonavir-boosted protease inhibitor regimens compared to single protease inhibitor therapy.

Low dose-ritonavir boosted protease inhibitors are increasingly being used for the first-line antiretroviral treatment, though their virological efficacy has just poorly been compared to alternative antiretroviral therapies. Here, we retrospectively investigated the virological responses of 316 protease inhibitor-naive HIV patients receiving highly active antiretroviral treatment based on a single (n = 256) or a ritonavir-boosted protease inhibitor (n = 60), both in the background of two nucleoside analogues. - By intent-to-treat analysis, a complete initial virological response was achieved in 71.8% of all patients in the single protease inhibitor group (indinavir: 76%, ritonavir: 67.5%, nelfinavir: 70.6%) and in 88.3% (p = 0.008) of patients treated with a boosted protease inhibitor (saquinavir/r: 71.4%, indinavir/r: 92.1%, lopinavir/r: 86.6%). The multivariate risk analysis identified boosted PI treatment as an independent predictor of a complete virological response (OR = 2.8, p=0.02). Viral rebound after an initial complete virological response was observed in 28% and 17% (p = 0.06) of patients receiving a single or a dual protease inhibitor, respectively. The rate of durable viral suppression over 12 months was 44.5% and 56.7% (p = 0.09) in the respective study cohorts. Ritonavir-boosted protease inhibitors therefore seem to induce a superior virological response rate and a higher degree of sustained virological suppression.

Adult↗
PubMed2003

Portal hypertension is associated with increased mRNA levels of vasopressor G-protein-coupled receptors in human hepatic arteries.

BACKGROUND: The contractile response of human splanchnic vessels to different vasoconstrictors is attenuated in cirrhosis. Functional studies indicate a cellular signalling defect upstream of the G-protein level. The aim of the present study was to analyze expression and mRNA levels of the following most relevant vasopressor receptors in the smooth musculature of human hepatic arteries: alpha1 adrenoceptor (AR) subtypes a, b and d, angiotensin II type 1 receptor (AT1), arginine vasopressin receptor type 1a (V1a), endothelin receptor type A (ETA) and B (ETB). MATERIALS AND METHODS: Hepatic arteries were collected from 10 donors (noncirrhotic) and 14 recipients (cirrhotic) at liver transplantations. Real-time-PCR was performed to quantify steady-state levels of receptor mRNAs. RESULTS: alpha 1aAR mRNA levels showed no significant difference between the cirrhotic arteries and the controls while the mRNA levels of the other vasoactive receptors were significantly higher in the cirrhotic hepatic arteries (alpha 1bAR: 4-fold, P = 0.013; AT1: 16-fold, P = 0.024; V1a: 23-fold, P = 0.001; ETA: 4-fold, P = 0.02; ETB: 8-fold, P = 0.008). No mRNA for the alpha 1dAR was detected either in the donor or recipient hepatic arteries. CONCLUSION: We conclude that vascular hyporeactivity to the most relevant endogenous vasoconstrictors of cirrhotic hepatic arteries is not caused by a receptor down-regulation at mRNA levels. In contrast they were up-regulated.

Adult↗
PubMed2003

Changes of lymphocyte apoptosis associated with sequential introduction of highly active antiretroviral therapy.

OBJECTIVE: To assess the effect of highly active antiretroviral therapy (HAART) on surrogate markers of lymphocyte apoptosis in HIV 1-infected individuals. METHODS: Ex vivo apoptosis was studied prospectively in 26 antiretroviral naive HIV-positive patients up to 12 weeks after sequential initiation of HAART [phase I: nucleoside reverse transcriptase inhibitor (NRTI), phase II: NRTI + protease inhibitor (PI)]. Apoptosis was assessed via CD95-, Apo2.7-expression and annexin-V-binding in peripheral CD4, CD8, B and NK-cells, and compared to changes in activation markers (HLA-DR, CD38) and viral loads. RESULTS: After introduction of HAART CD4-counts rose significantly mainly through cell redistribution, while activation markers decreased. Although Apo2.7 expression decreased throughout the study period, it was not possible to establish a correlation to the rise in CD4 cells. Unexpectedly, CD95 expression and annexin V binding were elevated during phase I of treatment without PI and began to decline only after the addition of a PI in phase II. Poor responders to antiretroviral therapy had significantly higher CD95 expression and annexin V binding in the initial phase of antiretroviral regimen. CONCLUSION: These data show divergent effects of HAART on surrogate markers of apoptosis, when treatment is initiated sequentially with NRTIs first. Partial suppression of HIV replication during treatment without PI may be associated with increased rates of apoptosis.

ADP-ribosyl Cyclase↗
PubMed2003

Benign hepatic tumours.

Benign hepatic tumours include a broad spectrum of regenerative and true neoplastic processes. Due to advances in imaging procedures like MRI, Cf-scan and ultrasound as well as progress in immunohistochemistry, the appropriate diagnosis is made ina high percentage of patients without laparotomy and resection. Most important in clinical practice is the differential diagnosis of focal nodular hyperplasia and hepatocellular adenoma because of the risk of rupture and bleeding in the latter. Cavernous haemangioma, the most common benign hepatic tumour, rarely needs treatment. The diagnosis of nodular regenerative hyperplasia is often missed and patients present with secondary complications and signs of portal hypertension that necessitate treatment. The main problem in angiomyolipoma is to distinguish it from malignant processes which do require treatment. Because of its clinical presentation, inflammatory pseudotumour is also sometimes confused with a malignant tumour. Therapeutic options are drug therapy or surgical resection. Benign haemangioendothelioma of the infant is rare but may cause life-threatening complications. Bile duct adenoma is an incidental finding that is not known to cause any symptoms whereas biliary cystadenoma is often symptomatic and may progress to cystadenocarcinoma and therefore needs resection.

Adenoma, Liver Cell↗
PubMed2003

Cystatin C as an endogenous marker of glomerular filtration rate in renal transplant patients.

BACKGROUND: Serum creatinine is the most common endogenous marker used to estimate the glomerular filtration rate (GFR). However, creatinine depends considerably on muscle mass, and its tubular secretion increases, especially in chronic renal failure. Cystatin C is a 13-kD protease inhibitor which is produced by all nucleated cells and is independent of muscle mass and sex. Cystatin C is eliminated by glomerular filtration and metabolized by proximal tubular cells. Its measurement has been proposed as an alternative and more sensitive marker of GFR than creatinine in patients with slight to moderately decreased GFR. METHODS: We investigated serum cystatin C levels in comparison with creatinine as a single measurement for estimation of GFR in 173 patients after renal transplantation. GFR was calculated as creatinine clearance according to standard equations. RESULTS: Serum creatinine correlated well with cystatin C (r = 0.84; p < 0.0001). No significant differences were obtained for the comparison of the linear correlation of 1/creatinine with creatinine clearance (r = 0.77; p < 0.0001) and for the linear correlation of 1/cystatin C with creatinine clearance (r = 0.73; p < 0.0001). However, we found a significant advantage of cystatin C in detecting a clinical relevant reduction of kidney function (GFR <70 ml/min; p = 0.0047, McNemar test). CONCLUSION: Cystatin C is an alternative marker for the assessment of GFR in renal allograft recipients that may be superior to creatinine.

Adult↗
PubMed2002

Enteric dysfunction in patients with asymptomatic HIV-infection versus patients with hypoproteinemia/hypalbuminemia and advanced HIV-infection.

BACKGROUND: It is unclear whether enteric dysfunction and protein losses contribute to hypoproteinemia, which heralds poor survival in HIV infection. METHODS: We investigated alpha-1-antitrypsin-clearance (AAT-CL), D-xylose resorption and total gut transition time in 14 HIV+ patients with hypoproteinemia (serum protein < 6 g/dl, albumin < 3 g/dl, median CD4-cell count 58/microl; (group I)), in 10 asymptomatic HIV+ patients (median CD4-cell count 290/microl, (group II)) and in 15 healthy volunteers (group III). RESULTS: AAT-CL in group I (16.5 (2.9 278.2) ml/d; median (range)) was higher than in groups II (9.5 (1.7 23.1) ml/d) and III (10.6 (0.8 19.5) ml/d; p = 0.0114). Likewise, D-xylose recovery was on average threefold lower in group I than in groups II (p = 0.0009) and III ( p < 0.0001), whereas total gut transition time was significantly shorter in both HIV-infected groups (group I: 49.8 h (23.5-72.7), p=0.0431; group II: 32.6 h (23-54.6), p=0.0104) than in the healthy controls (group III 61.6 h (39.1-87.7)). CONCLUSIONS: Thus, impaired intestinal resorption and enteral protein losses may contribute to hypoproteinemia in advanced HIV infection, whereas accelerated intestinal motility may be present already in asymptomatic stages of HIV infection.

Adult↗
PubMed2002

Evaluation of an ultrasound-guided technique for central venous access via the internal jugular vein in 493 patients.

Ultrasound guidance for percutaneous puncture of the internal jugular vein provides many advantages over the classic landmark-guided technique, particularly in complicated cases (e.g. thrombocytopenia, obesity, dyspnea). The present prospective investigation involved analysis of 493 punctures and provides patient- and operator-dependent variables with respect to the impact on puncture success and the complication rate. These 493 punctures of the internal jugular vein were performed using identical puncturing equipment and a standardized two-operator catheterization technique and were prospectively recorded on the hematology-oncology ward of a university hospital. Alongside success rates, the frequency and nature of complications, patient-inherent risk variables (obesity, thrombocytopenia, patient cooperation, vein diameter, etc.) and the individual experience of the physician performing the puncture and ultrasound were analyzed with respect to possible impact on success and complication rate. Internal jugular vein cannulation was successful in 94.5% of all patients. Catheter placement was successful at the first attempt in 87.6% of cases. Arterial fail punctures occurred in 1.4% of the patients and local hematoma in a further 4.3%. Among the patient-dependent variables, only poor patient compliance and a maximum vein diameter smaller than 7 mm showed a negative influence on the success rate. The experience of the physician carrying out the puncture influenced neither the success rate nor the complication rate. In contrast, both failure and complication rates were significantly lower when the physician guiding the sonographic probe was familiar with the method. Ultrasound-guided cannulation of the internal jugular vein provides safe central venous access with high success rates and low complication rates. Difficulties due to patient-inherent risk factors (e.g. thrombocytopenia, obesity, dyspnea) can be managed well using ultrasonographic guidance. The success rate achieved and the frequency of complications are decisively influenced not by the experience of the physician performing the puncture, but by the experience of the physician acting as sonographer.

Adult↗
PubMed2002

[Do polymorphisms of the SDF1 and CCR2b genes modify the course of hepatitis C or HIV/HCV co-infection?].

BACKGROUND AND OBJECTIVE: Complementary to the CCR5-Delta32 mutation polymorphisms in the genes of CCR2b (CCR2b-V64 I) and stromal derived factor (SDF)-1 (SDF-1 3'A) affect the course of the human immunodeficiency virus (HIV) infection. While the CCR5-Delta32 mutation is also increased in chronic hepatitis C virus (HCV) infection it is unclear, whether the CCR2b-V64 I and the SDF-1 3'A polymorphisms also are associated with chronic HCV infection. METHODS: We analyzed the frequencies of the CCR2b-V64I and SDF1 - 3'A mutation in patients with HIV/HCV coinfection (n = 130), HIV infection (n = 105), HCV infection (n = 153) and 112 healthy blood donors. We stratified each group into homozygous mutations, heterozygous mutations and homozygous wild types, respectively. The resulting subsets were compared with respect to HIV and HCV loads, CD4 and CD8 cell counts. RESULTS: The mutant SDF1 - 3'A allele was found at 20.3 % frequency in patients with HCV infection and at 20.4 % frequency in patients with HIV/HCV coinfection, respectively. It was present in 27.1 % of the patients with HIV infection and 27.9 % of the healthy controls (not significant). The number of SDF-1 3) A homozygous patients was highest in patients with HIV/HCV coinfection and significantly different compared to the Hardy-Weinberg equilibrium (p = 0.010, chi (2) = 9.15). However, CD4- and CD8-cell counts or viral loads were not affected by this mutation. The frequency of the CCR2b-V64 I allele was similar in all patient groups. However, CCR2b-V64 I heterozygous patients showed HIV loads that were threefold lower than in CCR2b wildtype patients (22.9 x 103 vs. 6.4 x 103 copies/ml, not significant). Furthermore, hepatitis C viral loads were reduced roughly by 30 %. CONCLUSION: These results suggest that the SDF1 - 3'A and CCR2b-V64I mutations do not affect the course of HCV and HIV/HCV infection in the same manner as does the CCR5-Delta32 mutation.

Adolescent↗
PubMed2002

[Endemic celiac sprue and Hodgkin's disease in a 72-year-old patient].

HISTORY AND CLINICAL FINDINGS: A 72-year-old man was admitted with diarrhea, loss of weight and anemia. The diarrhea started after antibiotic treatment of a pneumonia and persisted for 6 months at admission. Monoclonal gammopathy was found on external examination. INVESTIGATIONS AND DIAGNOSIS: The work-up yielded iron deficiency anemia, monoclonal gammopathy (IgG kappa) and elevated polyclonal IgA due to Gliadin- and endomysium-antibodies. Duodenal mucosa biopsies showed villous atrophy and increased intraepithelial lymphocytes. Celiac disease was diagnosed. Unexpectedly, mediastinal lymphomas were found and the concomitant diagnosis of Hodgkin's disease was made. TREATMENT AND COURSE: On gluten free diet all symptoms of malabsorption resolved. Therapy for the Hodgkin lymphoma with chemotherapy was initiated. As Bleomycin associated lung disease occurred during therapy, radiotherapy was not administered. A complete remission could be achieved. CONCLUSIONS: The association of celiac disease and malignancy is well known. The pathogenesis is not fully understood, but a correlation between the duration of gluten exposure and the rate of malignancy was found. Thus, the chronic immunologic stimulation might also have contributed to the development of Hodgkin's disease in our patient, which to date has been reported only anecdotally.

Aged↗
PubMed2002

Low frequency of enteric infections by Salmonella, Shigella, Yersinia and Campylobacter in patients with acute leukemia.

BACKGROUND: Several authors found that isolation of Salmonella, Shigella, Yersinia and Campylobacter spp. (SSYC) from stool cultures after the 3rd day of hospitalization is a rare event. The significance of enteric infections caused by these pathogens has not been systematically investigated in severely immunosuppressed patients with acute leukemia. PATIENTS AND METHODS: We screened all patients treated on the leukemia ward of a university medical center. A total of 1,185 stool cultures from 371 episodes of diarrhea, mostly following myelosuppressive chemotherapy, were examined for the complete range of classic bacterial enteric pathogens (i.e. SSYC). RESULTS: Only three (0.25%) cultures from one patient were positive for Salmonella enteritidis. This patient suffered from cholangitis. S. enteritidis could also be detected by liver biopsy. Other infections by classic enteric pathogens were not observed. CONCLUSION: Symptomatic infections by classic bacterial enteric pathogens in hospitalized patients with acute leukemia are very rare. Stool cultures for these pathogens cannot be recommended as a routine test in uncomplicated diarrhea occurring after the 3rd hospital day.

Acute Disease↗
PubMed2002

Decreased prevalence of Helicobacter pylori infection in HIV patients with AIDS defining diseases.

Various clinical studies indicated a lower prevalence of HP infection in HIV patients. The present study was initiated to determine whether the decreased frequency of HP infections in HIV patients might be associated with the stage of the underlying HIV disease or concomitant drug regimens the patients had received. 60 randomly selected HIV outpatients were stratified according to the stage of their HIV infection (CDC classification), their CD4 cell count and to the drug regimens they were given. Within these subgroups of patients, HP infection prevalence was separately investigated by serological and C13 breath testing. Data were compared to a reference population of 30 healthy volunteers. No difference in HP infection prevalence was found between the HIV infected patients in general and the reference cohort. A significantly lower proportion of HP infected individuals was observed among those HIV patients who had AIDS-defining diseases. Furthermore, a substantial but insignificant decrease of HP infection prevalence was noted in HIV patients with an extensive decline of CD4 cell count (< 100/microl). HIV patients who had received antimicrobial or H2-antagonizing drugs within 12 months prior to the study commencement also were found to have a remarkably decreased frequency of HP infections independently of their CD4 cell count. No association between HP infection prevalence and patients age, sex, risk group and the type of their antiretroviral treatment was found.We concluded from these results that the decreased HP infection prevalence in HIV patients may, apart from frequent antibiotic treatment, be correlated to the stage of HIV-mediated immune suppression.

AIDS-Related Opportunistic Infections↗
PubMed2002

[Clinical outcome of a cohort of 63 patients with hepatocellular carcinoma treated with octreotide].

Unresectable hepatocellular carcinoma (HCC) are associated with a poor prognosis. Recently, one controlled study reported a strikingly prolonged survival of patients with HCC who were treated with octreotide. Until other randomised controlled trials become available, this multicentric retrospective study therefore assesses the outcome of HCC-patients who received octreotide treatment. 63 patients (53 males, 10 females) who had been treated with octreotide at 13 participating German centres were included in the analysis. In 54 cases liver cirrhosis was present (25 Child-Pugh A, 20 Child-Pugh B, 7 Child-Pugh C, 2 unknown). The liver disease was associated with alcohol abuse in 19 patients, alcohol and viral hepatitis in four patients, while 12 patients had only markers of past or present hepatitis B infection, 11 patients suffered of chronic hepatitis C infection, and four patients were seropositive for both hepatitis B and hepatitis C markers. The Okuda stage was stage I in 23, stage II in 33, and stage III in 7 patients. The patients initially received octreotide as a long-acting release formula (20-30 mg/month) in 43 cases or through subcutaneous injection (dose 3 x 50-3 x 300 ug/day) in the remaining cases. 11 of the patients receiving subcutaneous treatment were later converted to the long-acting release form of the drug. At three months, a partial remission was achieved in two patients, while 22 tumours showed no change and 26 tumours progressed. At six months, 11 tumours showed no change, while 15 tumours progressed. The patients' median survival was 9 months (Okuda stage I 16 months, stage II 9 months, stage III 4 months). In conclusion, octreotide treatment did not result in markedly prolonged survival in this retrospective series of 63 patients.

Adult↗