Lucerne Cantonal Hospital

Luzern, Switzerland

Lucerne Cantonal Hospital

Luzern, Switzerland
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Maher C.,University of Queensland | Feiner B.,Technion University | Baessler K.,Pelvic Floor Center Charite | Christmann-Schmid C.,Lucerne Cantonal Hospital | And 2 more authors.
Cochrane Database of Systematic Reviews | Year: 2016

Background: A wide variety of grafts have been introduced with the aim of improving the outcomes of traditional native tissue repair (colporrhaphy) for vaginal prolapse. Objectives: To determine the safety and effectiveness of transvaginal mesh or biological grafts compared to native tissue repair for vaginal prolapse. Search methods: We searched the Cochrane Incontinence Group Specialised Register, which contains trials identified from the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, ongoing trials registers, and handsearching of journals and conference proceedings (6 July 2015). We also contacted researchers in the field. Selection criteria: Randomised controlled trials (RCTs) comparing different types of vaginal repair (mesh, biological graft, or native tissue). Data collection and analysis: Two review authors independently selected trials, assessed risk of bias, and extracted data. The primary outcomes were awareness of prolapse, repeat surgery, and recurrent prolapse on examination. Main results: We included 37 RCTs (4023 women). The quality of the evidence ranged from very low to moderate. The main limitations were poor reporting of study methods, inconsistency, and imprecision. Permanent mesh versus native tissue repair Awareness of prolapse at one to three years was less likely after mesh repair (risk ratio (RR) 0.66, 95% confidence interval (CI) 0.54 to 0.81, 12 RCTs, n = 1614, I2 = 3%, moderate-quality evidence). This suggests that if 19% of women are aware of prolapse after native tissue repair, between 10% and 15% will be aware of prolapse after permanent mesh repair. Rates of repeat surgery for prolapse were lower in the mesh group (RR 0.53, 95% CI 0.31 to 0.88, 12 RCTs, n = 1675, I2 = 0%, moderate-quality evidence). There was no evidence of a difference between the groups in rates of repeat surgery for continence (RR 1.07, 95% CI 0.62 to 1.83, 9 RCTs, n = 1284, I2 = 21%, low-quality evidence). More women in the mesh group required repeat surgery for the combined outcome of prolapse, stress incontinence, or mesh exposure (RR 2.40, 95% CI 1.51 to 3.81, 7 RCTs, n = 867, I2 = 0%, moderate-quality evidence). This suggests that if 5% of women require repeat surgery after native tissue repair, between 7% and 18% in the permanent mesh group will do so. Eight per cent of women in the mesh group required repeat surgery for mesh exposure. Recurrent prolapse on examination was less likely after mesh repair (RR 0.40, 95% CI 0.30 to 0.53, 21 RCTs, n = 2494, I2 = 73%, low-quality evidence). This suggests that if 38% of women have recurrent prolapse after native tissue repair, between 11% and 20% will do so after mesh repair. Permanent mesh was associated with higher rates of de novo stress incontinence (RR 1.39, 95% CI 1.06 to 1.82, 12 RCTs, 1512 women, I2 = 0%, low-quality evidence) and bladder injury (RR 3.92, 95% CI 1.62 to 9.50, 11 RCTs, n = 1514, I2 = 0%, moderate-quality evidence). There was no evidence of a difference between the groups in rates of de novo dyspareunia (RR 0.92, 95% CI 0.58 to 1.47, 11 RCTs, n = 764, I2 = 21%, low-quality evidence). Effects on quality of life were uncertain due to the very low-quality evidence. Absorbable mesh versus native tissue repair There was very low-quality evidence for the effectiveness of either form of repair at two years on the rate of awareness of prolapse (RR 1.05, 95% CI 0.77 to 1.44, 1 RCT, n = 54). There was very low-quality evidence for the effectiveness of either form of repair on the rate of repeat surgery for prolapse (RR 0.47, 95% CI 0.09 to 2.40, 1 RCT, n = 66). Recurrent prolapse on examination was less likely in the mesh group (RR 0.71, 95% CI 0.52 to 0.96, 3 RCTs, n = 292, I2 = 21%, low-quality evidence) The effect of either form of repair was uncertain for urinary outcomes, dyspareunia, and quality of life. Biological graft versus native tissue repair There was no evidence of a difference between the groups at one to three years for the outcome awareness of prolapse (RR 0.97, 95% CI 0.65 to 1.43, 7 RCTs, n = 777, low-quality evidence). There was no evidence of a difference between the groups for the outcome repeat surgery for prolapse (RR 1.22, 95% CI 0.61 to 2.44, 5 RCTs, n = 306, I2 = 8%, low-quality evidence). The effect of either approach was very uncertain for recurrent prolapse (RR 0.94, 95% CI 0.60 to 1.47, 7 RCTs, n = 587, I2 = 59%, very low-quality evidence). There was no evidence of a difference between the groups for dyspareunia or quality of life outcomes (very low-quality evidence). Authors' conclusions: While transvaginal permanent mesh is associated with lower rates of awareness of prolapse, reoperation for prolapse, and prolapse on examination than native tissue repair, it is also associated with higher rates of reoperation for prolapse, stress urinary incontinence, or mesh exposure and higher rates of bladder injury at surgery and de novo stress urinary incontinence. The risk-benefit profile means that transvaginal mesh has limited utility in primary surgery. While it is possible that in women with higher risk of recurrence the benefits may outweigh the risks, there is currently no evidence to support this position. Limited evidence suggests that absorbable mesh may reduce rates of recurrent prolapse on examination compared to native tissue repair, but there was insufficient evidence on absorbable mesh for us to draw any conclusions for other outcomes. There was also insufficient evidence for us to draw any conclusions regarding biological grafts compared to native tissue repair. In 2011, many transvaginal permanent meshes were voluntarily withdrawn from the market, and the newer, lightweight transvaginal permanent meshes still available have not been evaluated within a RCT. In the meantime, these newer transvaginal meshes should be utilised under the discretion of the ethics committee. © 2016 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.

Hirschmann A.,Lucerne Cantonal Hospital | Lamb T.A.,Ventana Medical Systems | Marchal G.,Hoffmann-La Roche | Padilla M.,Hoffmann-La Roche | Diebold J.,Lucerne Cantonal Hospital
American Journal of Clinical Pathology | Year: 2012

This study sought to evaluate a new combined gene and protein detection platform in the context of HER2 evaluation in breast and gastric carcinomas. HER2 immunohistochemistry (IHC) and dual color in situ hybridization (Dual ISH) were combined on a single slide. Results were compared with conventional HER2 IHC and fluorescence ISH. Results from the gene and protein assay were reliable and highly reproducible for both breast and gastric carcinomas. Concordance was found between conventional HER2 IHC and ISH testing and the gene and protein assay in the same laboratory (> 795% for Dual ISH; lower for IHC because of different antibody clones), between IHC and Dual ISH performed on the same slide (>92%), and in the gene and protein assays between laboratories (>96%). This cost- and time-effective method provides fast and definitive results (IHC confirmed by means of Dual ISH) to aid in rapid treatment decisions. It can also be applied to other gene and protein combinations. © American Society for Clinical Pathology.

Huellner M.W.,University of Zürich | Strobel K.,Lucerne Cantonal Hospital
European Journal of Nuclear Medicine and Molecular Imaging | Year: 2014

Today, SPECT/CT is increasingly used and available in the majority of larger nuclear medicine departments. Several applications of SPECT/CT as a supplement to or replacement for traditional conventional bone scintigraphy have been established in recent years. SPECT/CT of the upper and lower extremities is valuable in many conditions with abnormal bone turnover due to trauma, inflammation, infection, degeneration or tumour. SPECT/CT is often used in patients if conventional radiographs are insufficient, if MR image quality is impaired due to metal implants or in patients with contraindications to MR. In complex joints such as those in the foot and wrist, SPECT/CT provides exact anatomical correlation of pathological uptake. In many cases SPECT increases the sensitivity and CT the specificity of the study, increasing confidence in the final diagnosis compared to planar images alone. The CT protocol should be adapted to the clinical question and may vary from very low-dose (e.g. attenuation correction only), to low-dose for anatomical correlation, to normal-dose protocols enabling precise anatomical resolution. The aim of this review is to give an overview of SPECT/CT imaging of the extremities with a focus on the hand and wrist, knee and foot, and for evaluation of patients after joint arthroplasty. © Springer-Verlag Berlin Heidelberg 2013.

Bolouri C.,Lucerne Cantonal Hospital | Merwald M.,Lucerne Cantonal Hospital | Huellner M.W.,Lucerne Cantonal Hospital | Veit-Haibach P.,Lucerne Cantonal Hospital | And 4 more authors.
European Journal of Nuclear Medicine and Molecular Imaging | Year: 2013

Purpose: The aim of this study was to evaluate the performance of a novel flat-panel single photon emission computed tomography (SPECT)/CT in patients with suspicion of osteomyelitis (OM) of the jaw in comparison with conventional orthopantomography (OPT), planar bone scintigraphy (PS) and CT alone. Methods: Forty-two patients (21 female, 21 male, mean age 52, range 10-84 years) with suspected OM (n = 38) or exacerbation of a known OM (n = 4) were investigated with OPT, CT alone, PS and combined SPECT/CT. Images were separately reviewed by a nuclear physician/radiologist and jaw surgeon regarding presence of OM. Additionally, the different methods were rated regarding their usefulness for diagnosis (5-point scale: from 1 = diagnostic to 5 = useless). Biopsy served as the standard of reference in 30 patients and clinical/imaging follow-up of at least 6 months in 12 patients. Results: In 35 of 42 patients the final diagnosis of OM was established according to the reference standard. Sensitivity, specificity and accuracy for OPT was 59, 100 and 66 %, for CT alone 77, 86 and 79 %, for PS 100, 71 and 95 % and for SPECT/CT 100, 86 and 98 %. SPECT/CT was significantly more accurate compared with CT alone (p = 0.0078) and OPT (p = 0.001). SPECT/CT was rated as the most useful imaging modality (mean value 1.2) compared with PS (2.2), CT (2.5) and OPT (3.2). Conclusion: SPECT/CT is an accurate method to assess the presence of OM of the jaw and superior to CT alone and OPT. SPECT/CT slightly improved the specificity of PS. However, SPECT/CT in this study was not significantly more accurate compared with PS and whether the advantages to the patient of a one-stop study as opposed to doing separate CT and PS justifies its routine use in terms of cost requires further study. © 2012 Springer-Verlag Berlin Heidelberg.

Kreutziger J.,Innsbruck Medical University | Frankenberger B.,Pain Therapy and Emergency Medicine | Luger T.J.,Innsbruck Medical University | Richard S.,Cantonal Hospital of Aarau | Zbinden S.,Lucerne Cantonal Hospital
British Journal of Anaesthesia | Year: 2010

Background. Hyperbaric prilocaine 2% is a medium long-acting spinal anaesthetic. There are few data on time to recovery and rate of urinary retention after spinal administration of hyperbaric prilocaine 2%. This prospective study was carried out to evaluate the time to spontaneous micturition, quantify the rate of necessary bladder catheterizations, and identify the risk factors for urinary retention after intrathecal prilocaine administration.Methods. ASA I/II patients (16-80 yr) undergoing ambulatory lower limb surgery were enrolled and received spinal anaesthesia using hyperbaric prilocaine 2% (60 mg). Ringer's lactate was administered for peroperative volume replacement. Bladder ultrasound was performed hourly until spontaneous micturition or catheterization, when bladder filling reached 600 ml, and they were unable to urinate spontaneously.Results. Eighty-six patients completed the study (49 males and 37 females). Mean (sd) fluid administration was 1200 (499) ml until either micturition or catheterization; 37.8% of the women and 12.2% of the men required catheterization (P=0.009). Mean (sd) time between spinal anaesthesia and catheterization was 190 (88) min, and 260 (61) min to micturition (P<0.0001). Age <40 or >60 yr and female gender were predisposing factors for urinary retention.Conclusions. After spinal anaesthesia with hyperbaric prilocaine 2% (60 mg) for ambulatory lower limb surgery, 23% of patients required postoperative urinary catheterization. Postoperative bladder ultrasound and early catheterization are essential to avoid bladder distension and facilitate discharge in patients after intrathecal prilocaine 2% administration in ambulatory surgery. © The Author [2010]. Published by Oxford University Press on behalf of the British Journal of Anaesthesia. All rights reserved.

Huellner M.W.,University of Zürich | Pauli C.,Institute of Pathology | Mattei A.,Lucerne Cantonal Hospital | Ross S.,University of Zürich | And 5 more authors.
Investigative Radiology | Year: 2014

OBJECTIVES: The aim of this study was to assess the performance of dynamic contrast-enhanced computed tomography of the prostate in patients with biopsy-proven prostate cancer. MATERIAL AND METHODS: A total of 46 male patients (median age, 65 years; range, 49-73 years) with biopsy-proven prostate cancer underwent an en bloc computed tomography perfusion (CTP) scan of the prostate before surgery. The perfusion parameters mean transit time (MTT), blood flow (BF), and blood volume (BV), as well as the microvessel density (MVD) of surgical specimens were determined. Differences in CTP parameters and MVD among postsurgical Gleason score (sGS) and postsurgical combined Gleason grade (sGG) groups were analyzed. Spearman correlation coefficients were determined between CTP parameters and presurgical biopsy-derived Gleason score (bGS), presurgical biopsy-derived combined Gleason grade (bGG), sGS, sGG, MVD, and pathological tumor stage. A linear regression analysis was carried out for exogenous variables BF, BV, MTT, bGS, and presurgical biopsy-derived combined Gleason grade and endogenous variables sGS, sGG, MVD, and T stage. A receiver operating characteristics analysis was performed to analyze the discriminating performance of CTP parameters and bGS between intermediate-and high-grade tumors. RESULTS: The mean perfusion parameters within the prostate tissue were as follows: BF, 39.1 ± 13.4 mL/100 mL min; BV, 4.9 ± 2.4 mL/100 mL; and MTT, 8.9 ± 3.7 seconds. The mean MVD of the tumor tissue was 144.3 ± 55.6/mm. Computed tomography perfusion parameters and MVD were significantly higher in patients with high-grade tumors compared with those with intermediate-grade tumors (P < 0.01 for BF, BV, and MVD). Only BV and MVD were significantly different among sGS and sGG groups. Moderate correlations were found between BF and sGS (0.38) and between BV and sGS (0.43). Linear relations of BV to sGS and to sGG were found. Blood volume (area under the curve, 0.86) was superior to bGS (area under the curve, 0.75) in discriminating high-grade from intermediate-grade tumors. CONCLUSION: Computed tomography perfusion parameters derived by en bloc perfusion of the prostate are higher in high-grade tumors compared with intermediate-grade tumors. Blood flow and BV correlate with the definitive Gleason score. Blood volume predicts high-grade tumors better than does the Gleason score of biopsy specimens. Further studies are needed to determine a potential role for CTP in prostate cancer patients. © 2014 Lippincott Williams and Wilkins.

Nguyen-Kim T.D.L.,University of Zürich | Frauenfelder T.,University of Zürich | Strobel K.,Lucerne Cantonal Hospital | Veit-Haibach P.,University of Zürich | Huellner M.W.,University of Zürich
Investigative Radiology | Year: 2015

Objectives The aim of this study was to investigate the dual blood supply of non-small cell lung cancer (NSCLC) and its association with tumor subtype, size, and stage, using computed tomography perfusion (CTP). Materials and Methods A total of 54 patients (median age, 65 years; range, 42-79 years; 15 women, 39 men) with suspected lung cancer underwent a CTP scan of the lung tumor. Pulmonary and bronchial vasculature regions of interest were used to calculate independently CTP parameters (blood flow [BF], blood volume [BV], and mean transit time [MTT]) of the tumor tissue. The mean and maximum pulmonary and bronchial perfusion indexes (PImean and PImax) were calculated. The tumoral volume and the largest tumoral diameter were assessed. Differences in CTP parameters and indexes among NSCLC subtypes, tumor stages and tumor dimensions were analyzed using non-parametric tests. Results According to biopsy, 37 patients had NSCLC (22 adenocarcinomas [ACs], 8 squamous cell carcinomas [SCCs], 7 large-cell carcinomas [LCC]). The mean bronchial BF/pulmonary BF, bronchial BV/pulmonary BV, and bronchial MTT/pulmonary MTT was 41.2 ± 30.0/36.9 ± 24.2 mL/100 mL/min, 11.4 ± 9.7/10.4 ± 9.4 mL/100 mL, and 11.4 ± 4.3/14.9 ± 4.4 seconds, respectively. In general, higher bronchial BF than pulmonary BF was observed in NSCLC (P = 0.014). Using a tumoral volume cutoff of 3.5 cm3, a significant difference in pulmonary PImax was found (P = 0.028). There was a significantly higher mean pulmonary BF in LCCs and SCCs compared with ACs (P = 0.018 and P = 0.044, respectively), whereas the mean bronchial BF was only significantly higher in LCCs compared with ACs (P = 0.024). Correspondingly, the PImax was significantly higher in LCCs and SCCs than in ACs (P = 0.001 for both). Differences between bronchial and pulmonary PImean and PImax among T stages and Union Internationale Contre le Cancer stages were not statistically significant (P values ranging from 0.691 to 0.753). Conclusions The known dual blood supply of NSCLC, which depends on tumor size and histological subtype, is reflected in CTP parameters, with parameters depending both on tumor size and histological subtype. This has to be accounted for when analyzing NSCLC with CTP. © 2014 Wolters Kluwer Health, Inc.

Girguis-Bucher A.,Lucerne Cantonal Hospital | Schlegel-Wagner C.,Lucerne Cantonal Hospital
Journal of Laryngology and Otology | Year: 2013

Objective: We report a unique case of anatomical variation of the extracranial course of the optic nerve running in the floor of the sphenoid sinus. Method: Clinical and radiological findings are presented. Results: A 39-year-old woman with Turner syndrome presented with severe headache associated with visual disturbances. Magnetic resonance imaging revealed a mass presumed to be a sella meningioma. Computed tomography of the paranasal sinuses was undertaken to help plan surgical removal via an endoscopic trans-sphenoidal approach; this scan revealed an atypical extracranial course of the optic nerve, running in the floor of the sphenoid sinus. © JLO (1984) Limited 2013.

Rohner-Spengler M.,Lucerne Cantonal Hospital | Frotzler A.,Clinical Trial Unit | Honigmann P.,Lucerne Cantonal Hospital | Babst R.,Lucerne Cantonal Hospital
Journal of Bone and Joint Surgery - American Volume | Year: 2014

Background: After ankle and hindfoot fractures, edema has a major impact on the time for surgical intervention and may increase the risk of wound complications and infection postoperatively. The aim of this study was to evaluate the efficacy of multilayer compression and intermittent impulse compression therapy in reducing ankle and hindfoot edema compared with the standard treatment with elevation and ice. Methods: This was a randomized, controlled, single-blinded clinical trial using a repeated-measures design. Fifty-eight patients with unilateral fractures of the ankle or hindfoot were randomized into the cold pack (control) group, the bandage group, or the impulse compression group and were analyzed according to the intention-to-treat principle. The primary outcome was the reduction of edema as measured with the figure-of-eight-20 method. Results: Preoperatively and postoperatively, there were significant differences in edema reduction between the bandage group and the control group. After two days of intervention, the median preoperative edema reduction in the control group was -2.0 mm (-5%) compared with -11.0 mm (-23%) in the bandage group (p < 0.017), and -0.3 mm (0%) in the impulse compression group (p > 0.017). Postoperatively, after two days, the median edema changes were +3.5 mm (+7%) in the control group compared with -7.3 mm (-22%) in the bandage group (p < 0.017) and +5.0 mm (+46%) in the impulse compression group (p > 0.017). Conclusions: Multilayer compression therapy results in a faster reduction of ankle and hindfoot edema, although with less ankle dorsiflexion on postoperative day three than the control group, and can be recommended as an alternative treatment. Intermittent impulse compression applied without any extra compression by stockinette or bandage and without elevation in off-session periods cannot be recommended as a superior alternative to the treatment with ice. Level of Evidence: Therapeutic Level I. See Instructions to Authors for a complete description of levels of evidence. Copyright © 2014 by the Journal of Bone and Joint Surgery, Incorporated.

Huellner M.W.,Lucerne Cantonal Hospital | Burkert A.,Lucerne Cantonal Hospital | Schleich F.S.,Lucerne Cantonal Hospital | Schurch M.,Lucerne Cantonal Hospital | And 4 more authors.
European Journal of Nuclear Medicine and Molecular Imaging | Year: 2012

Background Hand and wrist pain is a diagnostic challenge for hand surgeons and radiologists due to the complex anatomy of the involved small structures. The American College of Radiology recommends MRI as the study of choice in patients with chronic wrist pain if radiographs are negative. Lately, state-of-the-art SPECT/CT systems have been introduced and may help in the diagnosis of this selected indication. Materials and methods This retrospective study included 21 patients with nonspecific pain of the hand/wrist. The diagnosis of nonspecific wrist pain was made by the referring hand surgeon based on patient history, clinical examination, plain radiography and clinical guidelines. All patients received planar early-phase imaging and late-phase SPECT/CT imaging as well as MRI. Lesions were divided into major (causative) and minor (not causative) pathologies according to clinical follow-up. Furthermore, oedema-like bone marrow changes seen on MRI were compared with focally increased tracer uptake seen on SPECT/CT images. Results MRI yielded a quite high sensitivity (0.86), but a low specificity (0.20). In contrast, SPECT/CT yielded a high specificity (1.00) and a low sensitivity (0.71). Oedema-like bone marrow changes were detected in 15 lesions in 11 patients. In ten lesions with bone marrow oedema on MRI, foci of elevated tracer uptake were detected on SPECT/CT. Overall, MRI was more sensitive, but SPECT/CT was more specific in the evaluation of causative pathologies. Conclusion In this initial comparison, SPECT/CT showed higher specificity than MRI in the evaluation of causative pathologies in patients with nonspecific wrist pain. However, MRI was more sensitive. Thus, SPECT/CTwas shown to be a useful problem-solving tool in the diagnostic work-up of these patients. © Springer-Verlag 2012.

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