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Biomedical subjects

R Függer

Publications and source records attributed to R Függer.

At least 37 records · Page 2Linked to original sources

Phase II study of gemcitabine in combination with cisplatin in patients with locally advanced and/or metastatic pancreatic cancer.

The present phase II trial was performed to assess the efficacy and toxicity of polychemotherapy with gemcitabine and cisplatin in patients with locally advanced or metastatic carcinoma of the pancreas. Sixteen patients received six courses of an i.v. cytotoxic regimen consisting of gemcitabine (1000 mg/m2, days 1, 8 and 15) and cisplatin (35 mg/m2, days 1, 8 and 15) administered in 28-day intervals. Complete remission (CR) occurred in one patient (6%), partial remission (PR) in four patients (25%) and stable disease in seven patients (44%), whereas four patients (25%) developed progressive disease resulting in an overall response rate of 31%. Mean duration of responses (CR+PR) was 3.6 (range 0.7-8.5) months and mean time to progression was 7.4 (range 3.8-12.6) months. After a mean observation period of 11.5 months the overall survival was 9.6 months with 12 patients (75%) still being alive, which compares favorably with historical data of the administration of gemcitabine alone. The performance status improved in three (19%) and stabilized in eight (50%) out of 16 patients for 4 weeks or longer. Treatment-associated toxicity included alopecia of WHO grade III in all cases, leukopenia of WHO grades I and II in 10 patients (63%), grade III in five patients (31%), and thrombocytopenia grades I and II in four patients (25%), and grades III and IV in 10 patients (63%). We conclude that the administered dosage and schedule of gemcitabine and cisplatin in patients with locally advanced or metastatic cancer of the pancreas constitutes an active cytotoxic regimen associated with moderate toxicity.

Adenocarcinoma↗

Candida infection of local necrosis in severe acute pancreatitis is associated with increased mortality.

The aim of this study was to evaluate the frequency of Candida infection of pancreatic necrosis in patients suffering from severe acute pancreatitis (SAP) and to analyze its impact on the outcome. Two-hundred and fifty consecutive patients with SAP from January 1986 to December 1998 were studied retrospectively. Their mean APACHE II score at the day of admission was in 16.1 (range 8-35). All patients were in need of operative therapy. Overall mortality was 38.8% (97 patients). One-hundred and eighty-two patients (72.8%) suffered from local infected necrosis. Among these patients, local Candida infection was observed in 31 patients, whereof 23 patients (74%) suffered from local fungal infection detected at first operation. During the course of disease, 12 patients (39%) also revealed fungemia. Local Candida infection as compared to no Candida infection was associated with an increased mortality rate (84% vs. 32%; P 0.0001). Multivariate logistic regression analysis identified APACHE II score (P < 0.0001), age of the patient (P < 0.003), extent of pancreatic necrosis (P < 0.002), and local bacterial (P < 0.04) and fungal infection (P < 0.004) as independent factors significantly contributing to mortality. SAP, requiring surgical treatment, is associated with high in-hospital mortality. Patients suffering from local Candida infection are at high risk of fatal outcome.

Adolescent↗

Video assistance reduces complication rate of thoracoscopic sympathicotomy for hyperhidrosis.

BACKGROUND: Thoracoscopic sympathicotomy has proved successful in the treatment of palmar hyperhidrosis. However, up to 8% of patients experience Horner's syndrome, and about 50% show compensatory sweating. This study evaluates the role of video assistance in thoracoscopic sympathicotomy for primary hyperhidrosis of the upper limb. METHODS: Six hundred fifty-six thoracoscopic sympathicotomies were performed from below T1 to T4 in 369 patients. Of the operations, 558 were done under direct view (CTS group) and 98, with video assistance (VATS group). Follow-up was complete for 78.3% of patients after a median observation period of 16 years. RESULTS: Dry limbs were immediately achieved in 93% of the CTS group and 98% VATS group (p = 0.98). In the CTS group, Horner's syndrome occurred after 2.2% of all operations and rhinitis in 8.3%. No patient in the VATS group showed any symptom of Homer's triad (p = 0.03 versus CTS group) or rhinitis (p = 0.02 versus CTS group). Compensatory sweating was observed in 66.8% in the CTS group versus 69% in the VATS group (p = 0.73) and gustatory sweating, in 50.4% versus 27.6%, respectively (p = 0.01). CONCLUSIONS: In performing thoracoscopic sympathicotomy for excessive upper-limb hyperhidrosis, we observed a significant decrease in the incidence of Horner's syndrome, rhinitis, and gustatory sweating when the procedure was guided by video imaging.

Adolescent↗

Long-term results of 45 thoracoscopic sympathicotomies for primary hyperhidrosis in children.

BACKGROUND/PURPOSE: Thoracoscopic sympathicotomy (TS) is successful in treatment of excessive hyperhidrosis of the upper limb after limited follow-up observation. The aim of the study was to assess for the first time long-term results of TS in children. METHODS: A total of 26 children (9 boys, 17 girls) aged 11 to 17 years with severe palmar or axillar hyperhidrosis underwent TS, and 19 patients were treated bilaterally. A total of 19 patients were observed after a median follow-up period of 16 years by questionnaire or clinical examination. RESULTS: Permanent relief from palmar hyperhidrosis was given in all examined patients. Twelve patients had compensatory and 12 patients gustatory sweating. Postoperatively, 1 subcutaneous emphysema and 1 temporary miosis and ptosis were noted. Eleven patients were fully satisfied with the result. Seven patients were only partially satisfied because of compensatory or gustatory sweating but would again undergo operation. One patient was not satisfied because of excessive compensatory sweating. CONCLUSIONS: TS is a safe and efficient procedure even after long-term follow-up. Severe palmar hyperhidrosis often starts in childhood; thus, early surgical treatment can improve social development. Compensatory and gustatory sweating are the most frequent and enduring side effects and should be mentioned in preoperative patient and parent information.

Adolescent↗

Stenosis of the common bile duct due to Ormond's disease: case report and review of the literature.

In a 46-year-old man endoscopic retrograde cholangiopancreatography and computed tomography scan showed a stenosis of the common bile duct by a hypodense mass highly suggestive of a Klatskin tumor. Histologic examination of the resected tumor revealed only non-specific inflammatory, fibrotic tissue without any evidence of malignancy. Three months later, the patient presented with hydronephrosis of the left kidney. Computed tomography scan showed a retroperitoneal mass with encasement of the left ureter. A percutaneous nephrostomy was performed and immunosuppressive therapy with prednisolone and azathioprine was initiated. Under this medication, almost complete regression of the pelvic mass and reopening of the ureter were observed within 3 weeks. Eight months later, azathioprine was withdrawn and prednisolone was tapered continuously to a dose less than 10 mg/day. After a follow-up of 2 years, the patient is still well. Although the histologic findings were non-specific, further evaluation of this case suggests that Ormond's disease was responsible for the tumor that had to be resected.

Cholangiopancreatography, Endoscopic Retrograde↗

HSP70 expression in granulocytes and lymphocytes of patients with polytrauma: comparison with plasma glutamine.

Heat shock proteins (HSP's) are a set of conserved proteins which confer tolerance to stress. These proteins play a major role in the pathophysiology of infection and inflammation. Induction of HSP's before onset of sepsis is able to reduce or prevent organ damage and death. GLN is known to influence the expression of HSP70 in different cell types. In this work we tried to find out if there is an association between plasma GLN levels and HSP70 expression in immune cells. We investigated six polytraumatized patients and a control group of six healthy donors. HSP70 expression was investigated by western blot analysis and immune-histochemistry. We demonstrated that granulocytes and lymphocytes behave differently in the expression of HSP70 in polytraumatized patients. In healthy donors both lymphocytes and granulocytes showed a pronounced expression of HSP70. In contrast, most of the polytraumatized patients showed no HSP70 expression in granulocytes. In lymphocytes of these patients, however, a pronounced expression similar to that of healthy volunteers was observed. Plasma glutamine levels were reduced in all patients and at normal range in healthy donors. These results suggest that lymphocytes and granulocytes behave different when confronted with a reduction of plasma GLN levels.

Adult↗

Bronchobiliary fistula after hemihepatectomy: cholangiopancreaticography, computed tomography and magnetic resonance cholangiography findings.

A bronchobiliary fistula (BBF), which is defined by an abnormal communication between the biliary system and the bronchial tree, is an uncommon complication after hemihepatectomy, trauma, hydatid disease, choledocholithiasis and other causes of biliary obstruction. We report the case of a 56-year-old man with colon cancer, who developed a BBF 2 months after right hemihepatectomy for liver metastases. The findings at endoscopic retrograde cholangiopancreaticography (ERCP), computed tomography (CT) and magnetic resonance cholangiography (MRC) included a stricture of the common bile duct and biliary leakage from the liver resection plane with biliary infiltration of the right lower lobe of the lung. The patient was treated successfully by endoscopic insertion of a biliary plastic stent which bridged the stricture and lead to closure of the fistula.

Biliary Fistula↗

Attenuation of catecholamine-induced immunosuppression in whole blood from patients with sepsis.

Studies performed on healthy volunteers have revealed that catecholamines down-regulate the lipopolysaccharide (LPS)-induced production of tumor necrosis factor (TNF)alpha, interleukin (IL)-6, and IL-1beta. We extended this observation and show that this effect is based on changes in the mRNA concentration of these cytokines. Catecholamines are increased in severe sepsis due to endogenous production and have to be administered exogenously when the disease has proceeded to the state of prolonged hypotension. We here investigated whether the immunomodulating effect of catecholamines could also be demonstrated in the blood of patients with prolonged severe sepsis and of those in prolonged septic shock. Blood was stimulated ex vivo with LPS in the presence and absence of epinephrine and the cytokine protein concentration was determined. In blood of healthy volunteers, epinephrine reduced the LPS-stimulated synthesis of TNFalpha by 62.5% (P< 0.0001), of IL-6 by 39% (P< 0.0001), and of IL-1beta by 40% (P= 0.015), and increased the LPS-stimulated IL-10 production by 77.8% (P < 0.0001). Correspondingly, in blood of patients with prolonged severe sepsis, TNFalpha was reduced by 67.2% (P < 0.0001) and IL-6 was reduced by 32.9% (P < 0.0001); IL-1beta and IL-10 were not modulated by catecholamines in these patients. In blood samples of patients in prolonged septic shock, epinephrine did not modulate cytokine levels of IL-6 and IL-10, and decreased TNFalpha only by 36.4% (P < 0.0001). Interestingly, epinephrine suppressed the IL-1beta production by 73% (P < 0.0001) in blood of patients in prolonged septic shock, which was twice as much as in blood samples of healthy volunteers. The altered response of septic blood to catecholamines might be due to an altered reactivity of leukocytes in the prolonged disease although an additional role of preexisting catecholamines cannot be completely excluded.

Adrenergic beta-1 Receptor Antagonists↗

[Use of the harmonic scalpel (Ultracision) in laparoscopic antireflux surgery].

Gastroesophageal reflux disease can effectively be treated by laparoscopic fundoplication. A new multifunctional device has recently been introduced, Ultracision (UC), which can be expected to be especially effective in laparoscopy. Since 9/1995 laparoscopic fundoplication is being performed at our institution. We routinely divide the "short-gastric vessels" and have been using clip-appliers and Endo-GIAs before dividing the vessels with endo-scissors. Since 2/1997 we also use the UC, which applies ultrasonic energy to cause denaturing of proteins and subsequent hemostasis and dissection. This open, non-randomized study compares operative time, intra- and postoperative complications and conversion rates as well as costs of both methods. Between 2/1997 and 12/1997 20 consecutive patients received a floppy Nissen fundoplication by 2 surgeons. In 8 patients clips/EndoGIA were used (m:w = 5:3, mean age 52 years [33-69]), in 12 patients UC (m:W = 10:2, 53 years [25-74]) was used. 2 patients in each group had had previous open abdominal surgery. In the first group 2 procedures had to be converted to open surgery (1 bleeding, 1 anatomical problem), median operative time was 214 min (135-360). In the UC group all procedures were completed laparoscopically, median operative time 132 min (75-240). Postoperative major complication and mortality rates were 0 in both groups. Use of the harmonic scalpel reduced operative time and costs without increasing conversion rates and perioperative complications.

Adult↗

Receptor and non-receptor mediated formation of superoxide anion and hydrogen peroxide in neutrophils of intensive care patients.

Generation of reactive oxygen intermediates (ROI) has been implicated in tissue damage in a variety of disease states including sepsis and trauma. On the other hand, generation of ROI in polymorphonuclear granulocytes (PMN) presents a crucial element in the defence of the host against invading microorganisms. In the present study we investigated the generation of superoxide anions (O2-) and hydrogen peroxide (H2O2) by neutrophils (PMN)5 of 17 critically ill patients treated at a intensive care unit (ICU) after polytrauma (n = 6), heart operation (n = 6) or during septic shock (n = 5) using flow cytometry. O2- production of PMN from ICU patients was significantly lower (p < 0.01) than that in healthy volunteers (HV) during non-receptor mediated stimulation with phorbol-myristate-acetate (PMA) but higher (p < 0.001) during receptor mediated stimulation with formylmethionine-leucine-phenylalanine (FMLP). H2O2 generation of PMN from ICU patients was increased after stimulation with FMLP (p < 0.01) and remained unchanged after stimulation with PMA. Patients in septic shock had lower O2(-)-generation of PMN than did injured patients and patients after heart operations. We conclude that receptor mediated formation of O2- and H2O2 is stimulated in ICU patients. However, in patients in septic shock O2(-)-generation decreases, which potentially might contribute to the immunoparalysis present in septic shock.

Adult↗

Management of lymphoceles after kidney transplantation.

Post-transplant lymphoceles (LC) may lead to impaired graft function. Treatment modalities include fine-needle aspiration, percutaneous drainage, and surgical internal drainage. Recently, laparoscopic fenestration has been performed with good results, but experience is still limited. Between January 1991 and August 1996, 919 kidney transplantations were performed in 876 patients at our department. There were 745 first, 133 second, 30 third, 9 fourth, and 2 fifth operations. Sixty-three symptomatic LCs were detected in 62 patients (6.8%) after 39 +/- 31 days. In 44% of the cases, graft function was impaired; in 29% hydronephrosis was documented and in 6% infection of the LC. Forty-five of the 62 patients with LC (73%) had histologically proven rejection. Thirty-five of the 63 LCs were drained percutaneously, 20 LCs were internally drained by open surgery, and 8 LCs were drained by laparoscopy. In 14 of the 47 patients (30%) with primary percutaneous drainage, LC recurred; infection occurred in 17%. Twelve of these patients underwent surgery. One surgical redrainage was necessary after open fenestration. No conversion or complication was noted in the laparoscopy group. We conclude that surgery for post-transplant lymphoceles is safe and effective. We favor the laparoscopic technique in selected patients.

Adult↗

Long-term results of 630 thoracoscopic sympathicotomies for primary hyperhidrosis: the Vienna experience.

OBJECTIVE: To evaluate of the results of thoracoscopic sympathicotomy for upper limb hyperhidrosis with a median observation period of more than 15 years. DESIGN: Retrospective clinical observation study. SETTING: University-affiliated tertiary referral centre. SUBJECTS: 630 consecutive operations in 352 patients (median age 30.1 yrs) for primary palmar (68%), axillary (12.7%) and combined hyperhidrosis (19.3%). INTERVENTIONS: Thoracoscopic sympathicotomy from below T1 to T4 including the fibres of Kuntz using electrocautery through single site access. MAIN OUTCOME MEASURES: Perioperative success and complication rates (all patients); long-term follow-up by a questionnaire and/or clinical examination (83.3% of patients) after a median period of 16 yrs. Calculation of statistical significance of differences between groups with c2-test. RESULTS: 67.8% of patients were fully satisfied, 25.7% were partially satisfied and would again agree to the operation. In 93% the procedure cured hyperhidrosis permanently. Compensatory and gustatory sweating was observed in 67% and 47% of cases, respectively. Overall success was significantly (p < 0.001) lower in the group with axillary hyperhidrosis. Main complications: drainage for pneumothorax 1.3%, Horner's syndrome in 3.8%, subcutaneous emphysema 2.1%. CONCLUSION: Thoracoscopic sympathicotomy proved to be highly effective even after long-term follow-up. Compensatory sweating impairs patients' satisfaction in some cases.

Adolescent↗

Early effects of catecholamine therapy on mucosal integrity, intestinal blood flow, and oxygen metabolism in porcine endotoxin shock.

OBJECTIVE: To determine the early effects of therapy of endotoxin (ET) shock with epinephrine, norepinephrine, or dopexamine on splanchnic circulation, oxygen metabolism, sigmoid mucosal pHi, bacterial translocation, and morphologic integrity of the ileal, colonic, and sigmoid mucosa. SUMMARY BACKGROUND DATA: Conflicting concepts exist concerning the catecholamine therapy of septic shock, but little is known about the effects of catecholamine treatment on splanchnic circulation and mucosal integrity. METHODS: ET shock was induced in pigs by ET infusion over 30 minutes, and animals were studied for 4 hours. All animals were resuscitated with fluid. To mimic the treatment of septic shock in humans, mean arterial pressure was maintained in two groups at >70 mm Hg with the administration of epinephrine or norepinephrine. A third group of animals received dopexamine at 7 microg/kg per minute. Systemic and splanchnic blood flow and oxygen metabolism were studied, sigmoid colon mucosal pHi was obtained tonometrically, and bacterial translocation was determined by culture of portal venous blood, mesenteric lymph nodes, liver, spleen, and lung specimens. Histologic sections of ileal, colonic, and sigmoid mucosa were morphometrically examined for therapy effects. RESULTS: All investigated catecholamines increased cardiac output and systemic oxygen delivery, whereas intestinal blood flow and oxygen delivery remained unchanged. Sigmoid mucosal pHi decreased in all study animals, but the decrease was most pronounced in the epinephrine group. Pigs receiving epinephrine also showed >40% damage of the mucosa of the ileum and colon, whereas animals receiving ET alone, norepinephrine, or dopexamine showed only moderate lesions with signs of restitution. No animal showed bacterial translocation. CONCLUSIONS: Systemic hemodynamics and oxygen metabolism data do not reflect intestinal perfusion. Norepinephrine or dopexamine administration in ET shock causes no additional impairment of intestinal integrity. Epinephrine therapy, in contrast, is associated with a significant reduction of mucosal pHi and considerable early mucosal damage. Its application in septic shock is hazardous.

Animals↗

Hepatic oxygen metabolism in porcine endotoxemia: the effect of nitric oxide synthase inhibition.

The role of endotoxin (lipopolysaccharide, LPS) and nitric oxide in hepatic oxygen metabolism was investigated in 36 pigs receiving 1) LPS (1.7 microgram. kg-1. h-1) for 7 h and NG-nitro-L-arginine methyl ester (L-NAME; 25 mg/kg) after 3 h, 2) LPS, 3) NaCl and L-NAME, and 4) NaCl. Infusion of LPS reduced hepatic oxygen delivery (DO2H) from 60 +/- 4 to 30 +/- 5 ml/min (P < 0.05) and increased the oxygen extraction ratio from 0.29 +/- 0.07 to 0.68 +/- 0.04 after 3 h (P < 0.05). Hepatic oxygen consumption (VO2H) was maintained (18 +/- 4 and 21 +/- 4 ml/min, change not significant), but acidosis developed. Administration of L-NAME during endotoxemia caused further reduction of DO2H from 30 +/- 3 to 13 +/- 2 ml/min (P < 0.05) and increased hepatic oxygen extraction ratio from 0.46 +/- 0.04 to 0.80 +/- 0.03 (P < 0.05). There was a decrease in VO2H from 13 +/- 2 to 9 +/- 2 ml/min that did not reach statistical significance, probably representing a type II error. Acidosis was aggravated. Administration of L-NAME in the absence of endotoxin also increased the hepatic oxygen extraction ratio, but no acidosis developed. In a different experiment, liver blood flow was mechanically reduced in the presence and absence of endotoxin, comparable to the flow reductions caused by L-NAME. The increase in hepatic oxygen extraction ratio (0.34) and maximum hepatic oxygen extraction ratio (approximately 0.90) was similar whether DO2H was reduced by occlusion or by L-NAME. We concluded that L-NAME has detrimental circulatory effects in this model. However, neither endotoxin nor L-NAME seemed to prevent the ability of the still circulated parts of the liver to increase hepatic oxygen extraction ratio to almost maximum when oxygen delivery was reduced. The effect of L-NAME on oxygen transport thus seems to be caused by a reduction in DO2H rather than by alterations in oxygen extraction capabilities.

Animals↗

[Restorative surgery of a Hartmann status for relief of chronic sphincter problems].

The Hartmann situation is a temporary intestinal diversion to treat diseases of the rectosigmoid. In case of benign rectosigmoidal disorders the entirely laparoscopic performance of the colon disconnection and reconstruction is an advantage due to its minimal invasive nature. A patient suffering from chronic anorectal fistula with temporary relief exclusively performed by laparoscopic approach is reported.

Adult↗

Does reoperation for abdominal sepsis enhance the inflammatory host response?

OBJECTIVE: To determine the effect of reoperation for severe abdominal sepsis on the course of proinflammatory mediators and hemodynamic factors. DESIGN: Inception cohort. SETTING: A university hospital and a secondary care hospital. PATIENTS AND METHODS: Fifteen patients suffering from severe peritonitis due to intestinal perforation or infected necrotizing pancreatitis were studied following 19 subsequent operations. Plasma samples were obtained immediately before and after reoperation, as well as at 1, 3, 6, 12, and 24 hours after operation to determine endotoxin, tumor necrosis factor alpha, and interleukin-6 levels. Clinical factors and therapeutic support were recorded at the corresponding times. MAIN OUTCOME MEASURES: Postoperative hemodynamic instability as defined by changes of the mean arterial pressure, pulmonary capillary wedge pressure, and vasopressor support. Courses of proinflammatory mediators were correlated to the hemodynamic findings. RESULTS: Mean arterial pressure decreased from 94 mm Hg postoperatively to 80 mm Hg at 3 hours (P = .006) and 81 mm Hg at 6 hours postoperatively (P = .005). Pulmonary capillary wedge pressure dropped from 14 mm Hg postoperatively to 12 mm Hg at 1 hour (P = .05). Vasopressor support significantly increased from 1 to 6 hours postoperatively (P = .02). Neither endotoxin nor tumor necrosis factor alpha levels showed significant changes in the postoperative course. Interleukin-6 levels continously increased from 586 pg/mL preoperatively to 910 pg/mL at 1 hour (P = .02) and 931 pg/mL at 3 hours postoperatively (P = .04). Overall interleukin-6 levels (R = -0.38, P = .003) and especially early postoperative interleukin-6 levels inversely correlated with postoperative mean arterial pressure. CONCLUSIONS: Reoperation for abdominal sepsis frequently causes substantial hypotension, and is, thus, potentially harmful to the patient. Reoperative trauma may induce an early postoperative increase in interleukin-6 levels. Because this increase occurs before the development of hypotension, a relationship between the kinetics of this cytokine and the observed hemodynamic instability may be present.

Adult↗

Lack of specificity of albumin-mRNA-positive cells as a marker of circulating hepatoma cells.

The aim of the study was to assess the specificity of albumin-messenger RNA (mRNA)-positive cells in peripheral blood as an indicator for circulating malignant hepatocytes. Albumin-mRNA-positive cells in the peripheral blood mononuclear cell (PMNC) fraction were detected by reverse-transcription polymerase chain reaction (RT-PCR). Albumin-mRNA-positive cells in PMNC were found in 12 of 19 (63%) patients with hepatocellular carcinoma, but also in 22 of 25 (88%) patients with chronic hepatitis without evidence for hepatoma, and in 18 of 19 (94%) of patients with acute viral hepatitis. In addition, 8 of 28 (28%) of healthy control individuals had also albumin-mRNA-positive cells in peripheral blood. PMNC known to be spontaneously negative for albumin-mRNA could be induced in vitro to transcribe albumin-mRNA after activation with a variety of substances such as interleukin-1 (IL-1) plus concanavalin A (Con A), IL-2, bacterial lipopolysaccharide, platelet derived growth factor, alpha-fibroblast growth factor, or hepatocyte growth factor. These results show that the majority of patients with acute and chronic liver disease without evidence for hepatocellular carcinoma has albumin-mRNA-positive cells in their PMNC fraction indicating the nonspecificity of that parameter for the presence of circulating malignant hepatocytes. In addition, in vitro experiments suggest that PMNC are capable of transcribing mRNA for albumin at a low level after activation. In vivo-activated PMNC are likely to be the source of positivity in healthy controls, patients with nonmalignant acute and chronic liver disease, and patients with hepatocellular carcinoma.

Adult↗