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Lill Y, Cespedes WV, Benitez BK, Eckstein-Halla NC, Leitmeyer KS, Gürtler N, Stieger C, Mueller AA. Screening for congenital hearing impairment with brainstem evoked response audiometry in isolated orofacial cleft. Int J Oral Maxillofac Surg 2024; 53:376-381. [PMID: 38061954 DOI: 10.1016/j.ijom.2023.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 11/24/2023] [Accepted: 11/29/2023] [Indexed: 04/16/2024]
Abstract
Brainstem evoked response audiometry (BERA) is the most established and recommended objective audiometric method for the clinical diagnosis of hearing impairment in high-risk infants. It is unclear whether infants with orofacial clefts meet the criteria for the high-risk group. This retrospective cohort study evaluated the need for diagnostic BERA in infants with cleft palate with or without cleft lip by assessing the predisposition to and diagnosis of congenital hearing impairment. Data from 122 patients treated at a single cleft centre were evaluated. BERA was conducted at the time of palate repair at 4-6 months of age. Clinical follow-up was analysed up to 4 years. The presence of a syndrome was examined as a risk factor for congenital hearing impairment. Among the 122 patients, four had congenital sensorineural or mixed hearing loss requiring hearing aids. All affected patients had syndromes in addition to the cleft. Most patients with elevated hearing thresholds had transient conductive hearing loss. Most suspected sensorineural hearing loss initially diagnosed was refuted. However, a higher incidence of sensorineural hearing loss was found in patients with syndromic clefts, supporting the diagnostic use of BERA with initial surgery only in patients with syndromic clefts.
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Affiliation(s)
- Y Lill
- Oral and Craniomaxillofacial Surgery, University Hospital Basel and University of Basel, Basel, Switzerland; Department of Clinical Research, University of Basel, Basel, Switzerland; Department of Biomedical Engineering, University of Basel, Allschwil, Switzerland.
| | - W V Cespedes
- Oral and Craniomaxillofacial Surgery, University Hospital Basel and University of Basel, Basel, Switzerland.
| | - B K Benitez
- Oral and Craniomaxillofacial Surgery, University Hospital Basel and University of Basel, Basel, Switzerland; Department of Clinical Research, University of Basel, Basel, Switzerland; Department of Biomedical Engineering, University of Basel, Allschwil, Switzerland.
| | - N C Eckstein-Halla
- Oral and Craniomaxillofacial Surgery, University Hospital Basel and University of Basel, Basel, Switzerland; Department of Clinical Research, University of Basel, Basel, Switzerland; Department of Biomedical Engineering, University of Basel, Allschwil, Switzerland.
| | - K S Leitmeyer
- Department of Otorhinolaryngology, University Hospital Basel and University of Basel, Basel, Switzerland.
| | - N Gürtler
- Department of Otorhinolaryngology, University Hospital Basel and University of Basel, Basel, Switzerland; Department of Otorhinolaryngology, University Children's Hospital Basel, Basel, Switzerland.
| | - C Stieger
- Department of Otorhinolaryngology, University Hospital Basel and University of Basel, Basel, Switzerland.
| | - A A Mueller
- Oral and Craniomaxillofacial Surgery, University Hospital Basel and University of Basel, Basel, Switzerland; Department of Clinical Research, University of Basel, Basel, Switzerland; Department of Biomedical Engineering, University of Basel, Allschwil, Switzerland.
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Schuler L, Hodel M, Stieger C. The Rapunzel syndrome: a hairy tale. Surg Case Rep 2023; 9:49. [PMID: 36976388 PMCID: PMC10050508 DOI: 10.1186/s40792-023-01631-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 03/23/2023] [Indexed: 03/29/2023] Open
Abstract
BACKGROUND Trichobezoars are a rare medical condition, often requiring a surgical approach and commonly associated with an underlying psychiatric disorder. The Rapunzel syndrome is a rare variant of trichobezoar in the stomach extending from the stomach into the small intestine causing a bowel obstruction. CASE PRESENTATION In this case report, the clinical presentation, diagnostic approach, and surgical removal of a large-size bezoar (Rapunzel syndrome) in a young and otherwise healthy female is described. Different surgical strategies are discussed. Psychiatric exploration gives an insight on development of trichophagia ultimately leading to the forming of the trichobezoar. CONCLUSIONS This brief report sheds light on the importance of the collective mind of a multidisciplinary team preventing a potentially fatal outcome.
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Affiliation(s)
- Luca Schuler
- Department of Emergency Medicine, Cantonal Hospital of Lucerne, Lucerne, Switzerland.
| | | | - Claudia Stieger
- Surgical Department, Cantonal Hospital of Lucerne, Lucerne, Switzerland
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Stieger C, Metzger J. [Hernia surgery on patients with co-morbidities]. Ther Umsch 2019; 76:563-569. [PMID: 32238113 DOI: 10.1024/0040-5930/a001139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Hernia surgery on patients with co-morbidities Abstract. Establishing a correct diagnosis and choosing the right surgical treatment is already a challenge for the healthy hernia-patient. But for them a clearly structured guideline already exists, according to international hernia societies the decision-making process should be done according to a patient-tailored approach. For sick hernia-patients with multiple risk factors for surgery, the challenge is even greater. In particular many different medical issues are incorporated into the therapeutic decision. The following article intends to provide an overview of the therapy-relevant secondary diagnoses to be observed and treated in advance.
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Affiliation(s)
| | - Jürg Metzger
- Allgemein- und Viszeralchirurgie, Luzerner Kantonsspital
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Gort R, Bühlmann K, Däster S, Salvatella G, Hartmann N, Zemp Y, Holenstein S, Stieger C, Fognini A, Michlmayr TU, Bähler T, Vaterlaus A, Acremann Y. Early Stages of Ultrafast Spin Dynamics in a 3d Ferromagnet. Phys Rev Lett 2018; 121:087206. [PMID: 30192573 DOI: 10.1103/physrevlett.121.087206] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 07/24/2018] [Indexed: 06/08/2023]
Abstract
Prior to the development of pulsed lasers, one assigned a single local temperature to the lattice, the electron gas, and the spins. With the availability of ultrafast laser sources, one can now drive the temperature of these reservoirs out of equilibrium. Thus, the solid shows new internal degrees of freedom characterized by individual temperatures of the electron gas T_{e}, the lattice T_{l} and the spins T_{s}. We demonstrate an analogous behavior in the spin polarization of a ferromagnet in an ultrafast demagnetization experiment: At the Fermi energy, the polarization is reduced faster than at deeper in the valence band. Therefore, on the femtosecond time scale, the magnetization as a macroscopic quantity does not provide the full picture of the spin dynamics: The spin polarization separates into different parts similar to how the single temperature paradigm changed with the development of ultrafast lasers.
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Affiliation(s)
- R Gort
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - K Bühlmann
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - S Däster
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - G Salvatella
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - N Hartmann
- Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland
| | - Y Zemp
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - S Holenstein
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
- Department of Physics, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - C Stieger
- Department of Information Technology and Electrical Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - A Fognini
- Department of Quantum Nanoscience, TU Delft, 2628 CD Delft, Netherlands
| | - T U Michlmayr
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - T Bähler
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - A Vaterlaus
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - Y Acremann
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
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Kutnyakhov D, Lushchyk P, Fognini A, Perriard D, Kolbe M, Medjanik K, Fedchenko E, Nepijko SA, Elmers HJ, Salvatella G, Stieger C, Gort R, Bähler T, Michlmayer T, Acremann Y, Vaterlaus A, Giebels F, Gollisch H, Feder R, Tusche C, Krasyuk A, Kirschner J, Schönhense G. Imaging spin filter for electrons based on specular reflection from iridium (001). Ultramicroscopy 2013; 130:63-9. [PMID: 23639852 DOI: 10.1016/j.ultramic.2013.03.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Revised: 03/15/2013] [Accepted: 03/18/2013] [Indexed: 11/18/2022]
Abstract
As Stern-Gerlach type spin filters do not work with electrons, spin analysis of electron beams is accomplished by spin-dependent scattering processes based on spin-orbit or exchange interaction. Existing polarimeters are single-channel devices characterized by an inherently low figure of merit (FoM) of typically 10⁻⁴-10⁻³. This single-channel approach is not compatible with parallel imaging microscopes and also not with modern electron spectrometers that acquire a certain energy and angular interval simultaneously. We present a novel type of polarimeter that can transport a full image by making use of k-parallel conservation in low-energy electron diffraction. We studied specular reflection from Ir (001) because this spin-filter crystal provides a high analyzing power combined with a "lifetime" in UHV of a full day. One good working point is centered at 39 eV scattering energy with a broad maximum of 5 eV usable width. A second one at about 10 eV shows a narrower profile but much higher FoM. A relativistic layer-KKR SPLEED calculation shows good agreement with measurements.
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Affiliation(s)
- D Kutnyakhov
- Johannes Gutenberg-Universität, Institut für Physik, 55099 Mainz, Germany
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Caversaccio M, Bell B, Stieger C, Nolte L, Weber S. A Self-Developed and Constructed Robot for Minimally Invasive Cochlear Implantation. Skull Base Surg 2012. [DOI: 10.1055/s-0032-1314165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Bernhard H, Stieger C, Perriard Y. Design of a Semi-Implantable Hearing Device for Direct Acoustic Cochlear Stimulation. IEEE Trans Biomed Eng 2011; 58:420-8. [DOI: 10.1109/tbme.2010.2087756] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
The fox tapeworm Echinococcus multilocularis is typically perpetuated in a cycle with red foxes as definitive hosts and various rodent species as intermediate hosts. In this study, foxes were baited with a highly efficient drug against cestodes (praziquantel) in 5 blocks of 1 km2. Voles, Arvicola terrestris, the most abundant intermediate host species, were trapped in the 5 baited blocks and in 5 non-baited control blocks. Baiting the foxes reduced the prevalence of E. multilocularis in fox faecal samples in the baited blocks, but voles trapped in the two blocks did not differ in their infection rates. However, voles from the baited blocks had significantly smaller spleen masses and were more likely to be infested with mites than those from the control blocks, possibly reflecting different immunological activities. Our study suggests that the environmental contamination with E. multilocularis eggs, and perhaps those of other tapeworms, influences the immune system of the intermediate host species A. terrestris in the wild.
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Affiliation(s)
- G A Schwarzenbach
- Zoological Museum, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.
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9
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Abstract
High prevalences of Echinococcus multilocularis have been reported from foxes of the city of Zurich, Switzerland. In order to characterize transmission in urban areas, a coproantigen ELISA was evaluated for diagnosing the infection in fox faecal samples collected in the environment. In addition, trapped rodents were investigated for the presence of metacestodes. Faecal samples could reliably be classified as being of fox origin by assessing physical properties as shown by the different parasite spectra of putative fox and dog faecal specimens. From the total of 604 tested putative fox faecal samples 156 (25.8%) were positive in the ELISA with a distinct increase in the proportion of positive samples from the urban to the periurban zone. Furthermore, samples collected in the border zone had significantly more coproantigen-positive results during winter. Prevalence of E. multilocularis in rodents was 9.1% (81/889) for Arvicola terrestris (with 3.5% of the animals harbouring between 14 and 244400 protoscoleces) and 2.4% (2/83) for Clethrionomys glareolus. E. multilocularis-infected A. terrestris were found in 9 of 10 trapping sites in the border zone. The high infection pressure in the periphery of urban areas might pose a risk for infection with E. multilocularis for both domestic carnivores as well as for urban inhabitants. Interventions into the cycle aiming at reducing the infection pressure should therefore focus on these areas.
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Affiliation(s)
- C Stieger
- Institute of Parasitology, University of Zurich, Switzerland
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Adler H, Vonstein S, Deplazes P, Stieger C, Frei R. Prevalence of Leptospira spp. in various species of small mammals caught in an inner-city area in Switzerland. Epidemiol Infect 2002; 128:107-9. [PMID: 11895085 PMCID: PMC2869789 DOI: 10.1017/s0950268801006380] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
In order to establish the leptospira carrier rate of small animals in an urban environment, small rodents and shrews were captured in the city of Zurich, Switzerland. Kidney specimens of 190 animals were examined using a leptospira specific PCR assay. Leptospiral DNA was amplified in kidneys of 12.6% of the animals.
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Affiliation(s)
- H Adler
- Bacteriology Laboratory, University Clinics Basel, Switzerland
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Dip R, Stieger C, Deplazes P, Hegglin D, Müller U, Dafflon O, Koch H, Naegeli H. Comparison of heavy metal concentrations in tissues of red foxes from adjacent urban, suburban, and rural areas. Arch Environ Contam Toxicol 2001; 40:551-556. [PMID: 11525499 DOI: 10.1007/s002440010209] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The red fox (Vulpes vulpes) is a representative of the canid family with wide distribution in the Northern Hemisphere and Australia. The increasing utilization of urbanized habitats by red foxes prompted us to test whether this species may be used to monitor the presence of anthropogenic pollutants in cities or suburbs. For that purpose, we compared the concentrations of heavy metals (Cd, Pb, Cu, Zn) in foxes from urban, suburban, and rural areas within the municipality of Zürich (Switzerland). The kidney and liver of suburban and rural foxes contained the highest Cd concentrations, whereas urban foxes contained the highest Pb levels. In the kidney of suburban foxes, Cd concentrations increased from a median value of 0.73 mg/kg in juvenile animals to 1.82 mg/kg in adults. Similarly, the liver of suburban foxes contained increasing Cd levels from a median of 0.21 mg/kg in juvenile animals to 0.94 mg/kg in adults. An age-dependent storage of Cd was also found in foxes from the rural surroundings, but no such accumulation occurred in urban foxes from the city center, where even adult animals contained very low Cd levels. Conversely, foxes from the urban center were characterized by elevated Pb concentrations during the first 2 years of life, but this transient Pb accumulation was absent in suburban or rural animals. The liver of juvenile foxes contained a median Pb concentration of 0.99 mg/kg in the city compared to only 0.47 and 0.37 mg/kg in the suburban and rural area, respectively. Thus, we found that animals from separate environmental compartments contain different patterns of tissue residues, implying that red foxes may serve as a bioindicator species to detect certain toxic hazards in urbanized habitats.
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Affiliation(s)
- R Dip
- Institute of Pharmacology and Toxicology, University of Zürich-Tierspital, Switzerland
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