Nicotine evoked efferent transmitter release onto immature cochlear inner hair cells.

Olivocochlear neurons make temporary cholinergic synapses on inner hair cells of the rodent cochlea in the first 2 to 3 wk after birth. Repetitive stimulation of these efferent neurons causes facilitation of evoked release and increased spontaneous release that continues for seconds to minutes. Presynaptic nicotinic acetylcholine receptors (nAChRs) are known to modulate neurotransmitter release from brain neurons. The present study explores the hypothesis that presynaptic nAChRs help to increase spontaneous release from efferent terminals on cochlear hair cells. Direct application of nicotine (which does not activate the hair cells' α9α10-containing nAChRs) produces sustained efferent transmitter release, implicating presynaptic nAChRs in this response. The effect of nicotine was reduced by application of ryanodine that reduces release of calcium from intraterminal stores.NEW & NOTEWORTHY Sensory organs exhibit spontaneous activity before the onset of response to external stimuli. Such activity in the cochlea is subject to modulation by cholinergic efferent neurons that directly inhibit sensory hair cells (inner hair cells). Those efferent neurons are themselves subject to various modulatory mechanisms. One such mechanism is positive feedback by released acetylcholine onto presynaptic nicotinic acetylcholine receptors causing further release of acetylcholine.

Familial hypercholesterolaemia in patients with ischaemic stroke or transient ischaemic attack.

BACKGROUND AND PURPOSE: Identification of patients with familial hypercholesterolaemia (FH) is a prerequisite for the appropriate management of their excess cardiovascular risk. It is currently unknown how many patients with acute ischaemic stroke or transient ischaemic attack (TIA) are affected by FH and whether systematic screening for FH is warranted in these patients. METHODS: The prevalence of a clinical diagnosis of FH was estimated in a large representative series of patients with acute ischaemic stroke or TIA (ABCD2 score ≥ 3) using the Dutch Lipid Clinic Network Algorithm (DLCNA; possible FH ≥3, probable/definite FH ≥6). RESULTS: Out of 1054 patients included in the present analysis, 14 had probable/definite FH (1.3%; 95% confidence interval 0.6-2.0) and 107 possible FH (10.2%; 8.4-12.0) corresponding to an overall prevalence of potential FH of 11.5%. Prevalences were even higher in patients with stroke/TIA manifestation before age 55 in men or 60 in women (3.1%, 0.6-5.6; and 13.1%, 8.3-17.9) and those with a prior history of cardiovascular disease (2.6%, 0.9-4.3; and 15.1%, 11.3-18.9). Of note, in two-thirds of our patients with probable/definite and possible FH, stroke or TIA was the initial clinical disease manifestation. CONCLUSIONS: The frequency of potential FH, based on clinical criteria, in patients with acute ischaemic stroke or TIA was 11.5% and that of probable/definite FH (1.3%) was similar to recently reported counts for patients with acute coronary syndrome (1.6%). FH screening using the DLCNA is feasible in clinical routine and should be considered as part of the usual diagnostic work-up.

How to evaluate scar colour after burn injuries - A clinical comparison of the Mexameter® and the subjective scar assessment (POSAS/VSS).

INTRODUCTION: Scarring after burn injuries remains one of the major challenges in burn medicine and is the subject of current research. Accurate and high-quality assessment of scars is needed to enable exact outcome evaluation of different treatments. Our aim was to evaluate the most common subjective scar evaluation scores-the POSAS (Patient and Observer Scar Assessment Scale) and VSS (Vancouver Scar Scale)-in comparison with the objective device Mexameter® for colour evaluation. METHODS: A prospective monocentre study was performed, which included 120 examined scar areas of 60 patients with third degree burns who had received skin grafts between 1975 and 2018 with a total burned surface area (TBSA) > 2%. Two different scar areas in comparison with one healthy skin area concerning 'colour', 'pigmentation', and 'vascularization' were evaluated by the Mexameter® MX 18, the OSAS, and the VSS by the same examiner, as well as the PSAS by the patient. RESULTS: The mean TBSA of the 60 patients was 24.3%. In the OSAS, 61% of the scars were evaluated as 'hyper-', 19% as 'hypo-', and 19% as 'mix-pigmented'. Furthermore, 65% of the scars were estimated as highly vascularized. In the Mexameter®, the melanin index values of the scar areas compared to the healthy skin areas showed a small difference of 12 (p < 0.05). The mean difference of erythema between the scar and the healthy skin areas was 84 (p < 0.001). For the Mexameter®, moderate correlations were found when comparing 'erythema' with the OSAS category 'vascularization' (r = 0.33, p < 0.05) and 'melanin' with the OSAS parameter 'pigmentation' (r = 0.28, p < 0.05). When comparing the Mexameter® measurements to the OSAS questionnaire, 27% of the scars were wrongly evaluated as 'hyperpigmented' by the observer and 21% as 'hypervascularized', while showing low measurements in the device. Additionally, a novel Mexameter® ordinal scare scale was calculated. CONCLUSION: In this study, we were able to show on a relatively large patient population that with the Mexameter®, the subjectivity of the scar colour assessment by examiner/patient can be overcome, but precise differentiation can still be ensured with subjective evaluation tools. We further introduced a novel Mexameter® Scar Scale. It is necessary to further investigate the vast range of objective devices and develop scar panels for with an incorporation of objective and subjective devices to further improve reliability with reduced bias in terms of scar assessment.

The BUrn Mortality Prediction (BUMP) Score - An improved mortality prediction score based on data of the German burn registry.

BACKGROUND: Burn injuries constitute the fourth most common injuries globally. Patient outcomes must be currently assessed to provide appropriate patient care with high quality standards. However, existing mortality prediction scoring methods have been shown to lack accuracy in current burn patient populations. Therefore, this study aimed to validate existing scores using current patient data and assess whether new prediction parameters can provide better accuracy. METHODS: A retrospective analysis of the patient data from the German Burn Registry between 2016 and 2019 was performed to evaluate all Abbreviated Burn Severity Index (ABSI) score parameters. All patients over 16 years of age who received intensive care were included. Descriptive statistics and logistic regression analysis were used to identify novel prediction parameters based on the parameters documented at admission and establish a new prediction score, the BUrn Mortality Prediction (BUMP) score. The quality of the new score was subsequently compared to that of the original ABSI, modified ABSI, Galeiras, Revised Baux score and TIMM. The new prediction score was then validated using patient data collected in the German Burn Registry in 2020. RESULTS: In total, 7276 patients were included. Age; the presence of at least two comorbidities; burn injuries caused by work-related accidents, traffic accidents and suicide attempts; total burn surface area; inhalation trauma and full-thickness burns were identified as independent significant predictors of mortality (p < 0.001). Additionally, we evaluated new age groups to improve prediction accuracy. The number of comorbidities (p < 0.001) and the aetiology (burns occurring at work [p = 0.028], burns caused by traffic accidents [p < 0.001] or burns due to attempted suicide [p < 0.001]) had a significant influence on mortality. The BUMP score, which was developed based on these parameters, showed the best fitness and showed more accurate mortality prediction than all the above-mentioned scores (area under the receiver operating characteristic curve: 0.947 [0.939-0.954] compared to 0.926 [0.915-0.936], 0.928 [0.918-0.939], 0.937 [0.928-0.947], 0.939 [0.930-0.948], 0.940 [0.932-0.949] respectively). CONCLUSIONS: A novel score (BUMP score) was developed for the purpose of external quality assessment of burn centres participating in the German burn registry, where observed and expected outcomes are compared on a hospital level, and for scientifically applications. The clinical impact of this score and its generalisability to other patient populations needs to be evaluated.

[Registry Research Funding of the German Society of Plastic, Reconstructive and Aesthetic Surgery (DGPRÄC) and Research Funding Report 2021/2022]. / Register Forschungsförderung der Deutschen Gesellschaft für Plastische, Rekonstruktive und Ästhetische Chirurgie (DGPRÄC) und Forschungsförderungs-Bericht 2021/2022.

BACKGROUND: Research is an integral part of academic medicine. In plastic surgery, it sets the course for innovations in the specialty. The purpose of this study is to present the research performance of plastic surgeons in Germany for the period 2021/2022 and to compare it with previous periods. MATERIALS AND METHODS: The directors of plastic surgical academic institutions reported all requested/approved and rejected research applications to public, non-public and industrial funding organizations. Data was gathered within an established online database. In addition, the DFG´s public database GEPRIS was screened for plastic surgical research grants. Data was also collected regarding research infrastructure and organization at the participating centers. RESULTS: 105 applications were reported to 54 different funding agencies from 20 plastic surgery centers. 37 funding applications were submitted to the major public funding agencies DFG, BMBF, BMWi, BMG, BMVg, G-BA and EU. Of these, 59,5% (22/37) were DFG, 13,5% (5/37) each BMBF and EU, 5,4% (2/37) BMWi, and 2,7% (1/37) each BMG, BMVg, and G-BA applications. The average funding volume of these proposals was 401,515 euros. Approved DFG proposals were most frequently assigned to the review board 205-27 Orthopedics, Trauma Surgery, Reconstructive Surgery (n=10/16, 62,5%). Over time, the research registry shows an increase in the number of proposals in general and those granted. 70,0% (14/20) of participating sites had their own experimental research laboratory, while only 40,0% (8/20) had their own clinical trial center. CONCLUSION: The 2021/2022 Research Funding Report once again highlights the impressive research accomplishments of the plastic surgery community.

[Extensive fibromata pendulantia. Hydrosurgery as a therapy option using the Versajet technique]. / Flächenhafte Fibromata pendulantia. Hydrochirurgie als Therapieoption mittels Versajet-Technik.

Fibromata pendulantia often appear as small filiform skin tags with a narrow pedicle in the neck, axilla and groin areas. Hitherto, extensive fibromata pendulantia were resected either surgically (curette, scissors, scalpel) or by laser. The present case study of an adipose patient with disseminated fibromata pendulantia in the axillary region in the setting of pseudoacanthosis nigricans introduces the Versajet hydrosurgery technique as an alternative method. It is able to remove tissue and rinse the wound simultaneously by means of a high-pressure water jet.

[Artificial intelligence in the management of anti-VEGF treatment: the Vienna fluid monitor in clinical practice]. / Künstliche Intelligenz im Management der Anti-VEGF-Therapie: der "Vienna Fluid Monitor" in der klinischen Praxis.

The Vienna fluid monitor is an artificial intelligence (AI) algorithm for the precise localization and quantification of retinal fluid. The algorithm is designed to help clinicians to make objective and accurate decisions in the anti-vascular endothelial growth factor (anti-VEGF) therapy of patients with neovascular age-related macular degeneration. The goal of the implementation is to optimize patient safety, preserve visual function and simultaneously to reduce the treatment burden on the healthcare system and patients.

[The medical habilitation at German universities: a comparison of the regulations over 23 years]. / Die medizinische Habilitation an deutschen Hochschulen: ein Vergleich der Ordnungen über 23 Jahre.

BACKGROUND: Due to the further decrease in the number of habilitations in medicine since 2010, the general requirements for habilitation could have increased during the same period. OBJECTIVE: The requirements for a medical habilitation at German universities in a comparison of 23 years are re-evaluated. MATERIAL AND METHODS: An analysis of habilitation regulations for 12 target parameters and evaluation of these by a scoring system (range 0-34 points). RESULTS: Only the criterion of the requirement for a doctorate has remained the same in the 23-year comparison in the evaluation (1998-2021). All results of the other 11 criteria have changed compared to the previous study from 2010. The rating of habilitation achievements has increased from a total score in 1998 of 15.2 ± 5.1 points (95% confidence interval 13.6-16.9 points) to 25.1 ± 3.6 points in 2021 (95% confidence interval 23.9-26.2 points; p < 0.001). The range of assigned scoring values is again more broadly spread in the 11-year comparison with values from 12 to 31 points. A striking new criterion was that 98% of the assessed habilitation regulations now require a didactic continuing education in, however, significantly different requirements from the faculties. CONCLUSION: The requirements for a medical habilitation continued to significantly increase over the 23-year period with, however, a wider dispersion of scores. The more detailed description can be seen as a direct indication of an improvement in transparency. In contrast, the broader dispersion shows that a uniform assessment standard for Germany has again receded into the distance.

Does patient load affect clinical outcome of burn patients in specialized centers? An analysis of the German Burn Registry.

Hospital volume has been identified as an independent outcome parameter for a number of medical fields and surgical procedures, and there is a tendency to increase required patient numbers for center verification. However, the existing literature does not support a clear correlation between patient load and clinical outcome in adult burn care and recent data from Germany does not exist. We therefore evaluated the effect of patient volume in German burn centers on clinical outcome. Patient data was extracted from the German Burn Registry from 2015 to 2018. For better inter-center comparability, solely burn patients with a TBSA ≥ 10% were included. Mortality, number of surgeries and length of stay (LOS) were evaluated with respect to burn center patient volume. Burn center volume was divided into two and three groups. A total of 2718 patients with a TBSA ≥ 10% were admitted to the participating 17 burn centers. Independent from the division of patient data into either 2 or 3 groups, the TBSA and ABSI score-related severity of burn injuries were comparable between groups. There was no significant difference in mortality due to center size. Nevertheless, patients treated in large volume burn centers showed a significantly increased LOS (+4.5 days, [1.9-7.2] CI, p = 0.001) and required significantly more surgeries (+0.5 surgeries [0.2-0.8] CI, p = 0.002) when compared to the small volume centers. A similar phenomenon regarding mortality and LOS (p 0.001) was observed after dividing the centers into two groups. Interestingly a division into three groups showed significant differences with the best outcome for patients in medium-volume centers. Nevertheless, mortality did not differ significantly. Therefore, our data demonstrates that in contrast to many other medical fields, outcome and mortality are not automatically improved in burn care by simply increasing the patient load, at least in centers treating 20-100 BICU patients/year.

Determination of the Avogadro constant by counting the atoms in a 28Si crystal.

The Avogadro constant links the atomic and the macroscopic properties of matter. Since the molar Planck constant is well known via the measurement of the Rydberg constant, it is also closely related to the Planck constant. In addition, its accurate determination is of paramount importance for a definition of the kilogram in terms of a fundamental constant. We describe a new approach for its determination by counting the atoms in 1 kg single-crystal spheres, which are highly enriched with the 28Si isotope. It enabled isotope dilution mass spectroscopy to determine the molar mass of the silicon crystal with unprecedented accuracy. The value obtained, NA = 6.022,140,78(18) × 10(23) mol(-1), is the most accurate input datum for a new definition of the kilogram.

Does Platelet-Rich Fibrin Enhance Healing Of Burn Wounds? Our First Experiences And Main Pitfalls.

Recent research found that enzymatic debridement clearly improves long-term scarring in burns. By reducing the spontaneous wound-healing period, scarring might be optimized. The latest publications show that wound healing can be accelerated by the application of platelet-rich fibrin (PRF). However to date no study that evaluates PRF treatment in burn wounds following enzymatic debridement has been published. We conducted a single-center prospective observational trial treating ten patients with partial thickness to deep dermal burns after enzymatic debridement with PRF. After wound treatment, the dressing remained untouched for five days. For wound healing, we compared different dressings and treatment options. Minimum pain and no signs of infection were observed during any of the treatments. Physicians were able to learn the manufacture of PRF quickly. For two early treatments, skin grafting was required. In one case, the dressing was removed too early. In a second case, the wait for spontaneous wound healing was not long enough. After a standardized treatment procedure was set, we found that results were clearly improving. Mean healing time of seven wounds treated with Suprathel® dressing was 18 days (min 9 days, max 21 days). PRF application might be useful to reduce healing time in partial thickness to deep dermal burn wounds that heal spontaneously after enzymatic debridement. Thus, scarring can be improved.

Les données récentes indiquent clairement que le débridement enzymatique (DE) diminue nettement les séquelles de brûlure, en accélérant leur cicatrisation (et l'on sait que la France est le seul pays d'Europe où cette technique est inutilisable, NDRLF). Les dernières publications montrent que cette cicatrisation peut être accélérée par l'utilisation locale de Fibrine Riche en Plaquettes (FRP). Cette technique n'a pas encore été évaluée couplée au DE. Nous avons évalué ce couplage auprès de 10 patients victimes de brûlures des 2èmes degrés intermédiaire et profond, le pansement étant laissé en place 5 jours après DE+PRP, plusieurs options ayant été essayées. La douleur restait minimale et aucune infection n'a été observée. Les praticiens ont facilement appris la préparation de FRP. Deux échecs ont été observés en début de série (nécessité de greffe). Dans un cas, le pansement a été enlevé trop précocement. Dans l'autre, la greffe a été décidée trop rapidement. La standardisation subséquente du protocole en a nettement amélioré les résultats. Le délai moyen de cicatrisation de 7 patients sous Suprathel® était de 18 j (9- 21). La FRP pourrait être utile à réduire le délai de cicatrisation des brûlures intermédiaires à profondes après débridement enzymatique et ainsi en limiter les séquelles.

Our Initial Experience In The Customized Treatment Of Donor Site And Burn Wounds With A New Nanofibrous Temporary Epidermal Layer.

Recently, electrospinning technology has gained increasing attention for wound care. SpinCare™ electrospun polymer nanofibrous temporary epidermal layer is one of the latest developments in the market. Our objective was to explore the potential use of the new SpinCare™ system for treating burns and wounds. We conducted a single-center prospective observational trial, treating 10 patients with superficial to partial thickness wounds including burn wounds with a nanofibrous dressing. Treatment was evaluated, including procedures, place of injury, treatment times, ease of use etc. Ten superficial to deep dermal wounds were treated successfully. Inexperienced users learned the handling of the device quickly. Covering difficult-to-access wound surfaces was challenging. One leading problem is that the product is nearly opaque once applied on the moist wound. We introduced a standardized 3-day treatment protocol. After application, wounds were covered with a silicon layer for 2 days. The nanofibrous dressing appeared to be suitable following enzymatic debridement in burn wounds. Because there is a risk of wounds drying out under the dressing, the application should probably be limited to superficial and partial thickness wounds if not combined with other treatment options. The electrospun polymer nanofibrous temporary epidermal layer shows promising results in the treatment of superficial to partial thickness wounds including burns. However, minor improvements might help to optimize its usage and thus take full advantage of all existing treatment options.

Récemment, la technologie d'électro filage, plus couramment appelée électro spinning, a trouvé des applications dans le domaine du traitement des plaies. SpinCare™, épiderme temporaire en polymères nano fibreux obtenu par électro spinning, est l'un des derniers développements sur le marché. Notre objectif était d'étudier les utilisations potentielles du nouveau dispositif SpinCare™ dans le traitement des brûlures et des plaies. Nous avons conduit une étude prospective, observationnelle, mono centrique. Nous avons traité 10 patients présentant des plaies de profondeur superficielle à intermédiaire, incluant les brûlures, avec le polymère nano fibreux. Nous avons évalué ce traitement, en tenant compte à la fois du protocole, de la localisation de la plaie, de la durée du traitement, de la facilité d'utilisation, etc. Nous avons obtenu la cicatrisation de 10 plaies atteignant le derme plus ou moins profondément. La courbe d'apprentissage était rapide. L'application sur des plaies de localisation difficile a pu être réalisée. L'un des problèmes majeurs est que le produit devient pratiquement opaque après application sur la plaie humide. Nous avons élaboré un protocole de traitement sur 3 jours. Après l'application du polymère nano fibreux, celui-ci a été recouvert d'une feuille de silicone pour 2 jours. Ce pansement semble pouvoir être appliqué sur une plaie ayant subi un débridement enzymatique dans le cadre des brûlures. En raison du risque d'assèchement de la plaie sous le pansement, son utilisation est probablement réservée aux plaies de profondeur superficielle à intermédiaire s'il n'est pas associé à d'autres options thérapeutiques. Cet épiderme temporaire en polymères nano fibreux obtenu par électro spinning semble être prometteur dans le traitement des plaies de profondeur superficielle à intermédiaire, y compris les brûlures. Cependant, quelques améliorations permettraient d'optimiser son utilisation et de supplanter avantageusement d'autres traitements.

Influence Of Pre-Existing Neurological Illnesses On The Outcome Of Severe Burn Injuries.

It is known that patients suffering from neurological illnesses have an increased risk of burn injuries. These burns are often very severe and lead to poor outcomes. To date, only a few studies have evaluated the impact of pre-existing neurological illnesses on the outcome of burn injuries. None of them performed a regression analysis regarding specific influence on mortality. Between 1996 and 2016, 1475 patients were admitted to the BICU of a specialized German burn center: 26 had less than 1% TBSA burned and were excluded; 177 had pre-existing neurological disorders (group N). 87 patients with psychological disorders were excluded. 1185 patients without neurological or psychological disorders formed the control group. Length of hospital stay, TBSA and number of operations were analyzed using the chi-squared test and Mann-Whitney U-test. Additionally, mortality was evaluated using the logistic regression analysis adjusted for known outcome predictors. Mean age of the patients in the control group was 41.53 years with a BICU stay of 18 days, TBSA of 18.25% and mortality rate of 12.4%; 23.7% had inhalation injuries. Patients in group N had a mean age of 54.63 years, a BICU stay of 27 days, mean TBSA of 20.97%; 31.1% had inhalation injuries and mortality was 20.3%. Patients with neurological disorders were older and showed higher affected TBSA, higher rates of inhalation injury, mortality and affected TBSA, and a longer stay in the BICU compared to the control group. Nevertheless, pre-existing neurological disorders alone had no significant influence on mortality.

Il est avéré que les patients souffrant de pathologie neurologique ont un risque plus élevé de brûlure. Elles sont souvent particulièrement graves et d'évolution défavorable mais la littérature à ce sujet reste pauvre et aucune étude n'a utilisé de régression logistique pour évaluer la corrélation pathologie neurologique- évolution d'une brûlure. Entre 1996 et 2016, 1 475 patients ont été hospitalisés en réanimation spécifique dans un CTB allemand. Vingt- six d'entre eux, brûlés sur moins de 1% SCT, n'ont pas été inclus dans l'étude, pas plus 87 patients psychiatriques si bien que 177 patients souffrant de pathologie neurologique (N) ont été comparés à 1 185 n'en souffrant pas (C). Les durées d'hospitalisation, la surface brûlée et le nombre d'interventions chirurgicales ont été analysée en utilisant C² ou Mann-Whitney. En outre, nous avons effectué une régression logistique étudiant la mortalité, en utilisant les facteurs connus de mortalité. Le groupe C avait 41,53 ans, souffrait de brûlures sur 18,25% SCT, avait inhalé des fumées dans 23,7% des cas, avait un taux de mortalité de 12,4% et restait 18 j en réanimation. Dans le groupe N, ces chiffres étaient respectivement de 54,63 ans, 20,97% SCT, 31,1% de fumées, 20,3% de mortalité et 27 jours en réa. Tous les chiffres étudiés étaient plus élevés dans N que dans C. Toutefois, l'existence de comorbidité neurologique n'apparaissait pas un critère indépendant de mortalité.

[Registry Research Funding of the German Society of Plastic, Reconstructive and Aesthetic Surgeons (DGPRÄC) and Research Funding Report 2019/2020]. / Register Forschungsförderung der Deutschen Gesellschaft der Plastischen, Rekonstruktiven und Ästhetischen Chirurgen (DGPRÄC) und Forschungsförderungsbericht 2019/2020.

BACKGROUND: Since 2015/16 the DGPRÄC collects, evaluates and publishes the research activities of academic sections, departments and clinics for plastic surgery at university hospitals in Germany, in order to raise the awareness of plastic surgical research performance. MATERIALS AND METHODS: The directors of plastic surgical academic institutions were contacted via the DGPRÄC and asked to report any requested/approved and rejected research applications to public, non-public and industrial funding organizations. Data was collected in our previously established online database: https://docs.google.com/forms/d/e/1FAIpQLSe6F5xmTyw-k7VKJx_2jkPA4LBXsA0sgBGMrC3rx_4bHj6uzQ/viewform?usp=sf_link. In addition, applications were identified via the DFG's public database GEPRIS. RESULTS: A total of 41 funding applications to the public funding institutes DFG, BMBF, BMWi, BMG and EU were identified. 75.6 % (31/41) of the applications had already been approved at the time of data collection, of which 77.4 % (24/31) were DFG, 9.7 % (3/31) were BMWi, 6.5 % (2/31) were EU and 3.2 % (1/31) were BMBF or BMG applications. The average funding amounted to 358 301 Euro. In 50.0 % (12/24) of the cases, the approved DFG proposals were assigned to the subject review board 205-27 Orthopedics, Trauma Surgery, Reconstructive Surgery. CONCLUSION: The continuous publication of plastic surgical research funding reports submitted by the convention of university plastic surgeons of the DGPRÄC portraits the excellent, collaborative research activity in the field of plastic surgery.

Modified technique for thoracomyoplasty after posterolateral thoracotomy.

OBJECTIVE: Thoracomyoplasty after prior posterolateral thoracotomy (PLT) remains a challenge for the thoracic surgeon. Thoracodorsal artery division after PLT impairs the vascularization supply of the latissimus dorsi muscle (LDM) resulting in muscle mass reduction due to distal atrophy. This makes adequate filling of residual empyema space and/or surgical closure of bronchial stump insufficiency more difficult, and they require alternative surgical procedures. We present an alternative approach using a four-muscle flap technique to include the infraspinatus, the subscapularis and the teres major muscle group, all pedicled from the subscapular artery as a part of a modified thoracomyoplasty technique for closing residual empyema space and bronchial stump insufficiency. METHODS: Between 2002 and 2008 we performed the technique in 7 patients with residual empyema space. Three patients had post-tuberculosis syndrome, 2 had postpneumectomy empyema, and 2 had chronic parapneumonic empyema. Three cases were combined with a bronchopleural fistula. All patients underwent a two-stage procedure. First, open window thoracostomy was performed followed by definitive surgical treatment after 3-6 months. In all cases with bronchial insufficiency the stump was covered with a subscapularis muscle flap. The infraspinatus and the teres muscle group were used in combination with a local thoracoplasty. RESULTS: Mean age was 68 +/- 7.9 years. Time from open window thoracostomy to thoracomyoplasty averaged 4 +/- 1.3 months. The number of resected ribs ranged between 4 and 8. Mean postoperative stay in the ICU was 3 +/- 2.9 days. The thoracic drains were removed after 5 +/- 2.3 days. Total hospital stay was 15 +/- 7.6 days. No hospital mortality was noted. Minor postoperative complications occurred in 2 cases. Shoulder function without pain allowed abduction up to 90 degrees. Function was decreased by 16 +/- 9 degrees compared to preoperative evaluation. No severe progressive scoliosis was noted. CONCLUSIONS: Division of the LDM and its vascular supply after posterolateral thoracotomy results in a reduction of muscle mass. The shoulder girdle muscles offer an adequate alternative to fill residual empyema space with acceptable long-term results and restriction in shoulder motion. In all cases with bronchial fistula, bronchial stump closure with a pedicled subscapular muscle was an effective alternative operative technique.

[Nazi action T4 euthanasia programme: historical research, individual life stories and the culture of remembrance]. / Die nationalsozialistische "Euthanasieaktion T4" : Historische Forschung, individuelle Lebensgeschichten und Erinnerungskultur.

The psychiatric patients killed under the disguise of euthanasia during World War II belong to the group of victims which are often forgotten in public remembrance. For German and Austrian psychiatry it is important to include them into the memory of the discipline as well as into European remembrance of the victims of Nazi annihilation policy. The patient files of the victims enable us to reconstruct the criterion of economic usefulness for deciding about life or death. But above all the files are the basis on which the suffering and the life histories of the patients can be told.

Pre-Hospital Care Of Patients With Severe Burns In Germany: A Review Of 29 Years Of Experience.

Despite the high number of burn injuries worldwide, pre-hospital care differs across regions. Data documenting pre-hospital care of severe burn injuries in Germany are scarce. Nevertheless, efficient prehospital care of burn patients is crucial for later outcomes. Therefore, we retrospectively analyzed pre-hospital care in patients admitted to the burn intensive care unit of a specialized burn center in Germany from 1989 to 2018. Approximately one-third of all admitted patients arrived intubated to the burn intensive care unit. Mean total burned surface area was higher in intubated patients than in non-intubated patients. Hypothermia prevention measures were undertaken in most patients. Although cooling was performed in only 36 primarily admitted patients, it did not have an effect on temperature at admission. Instead, in the regression analysis a positive influence on mortality could be found (p=0.03). Inhalation injury was a reason for intubation and corticosteroid therapy. Corticosteroid use declined over the years and had no significant influence on mortality (p=0.38). Inhalation injury could be diagnosed in only 50.68% of patients receiving corticosteroids. Furthermore, especially in recent years, most patients with inhalation injuries did not receive corticosteroids. Although efficient prehospital care is crucial for later outcomes, standard pre-hospital care through first aiders and emergency personnel has not been applied. Therefore, strategies for information exchange, leading to standardized pre-hospital treatment guidelines, should be given high priority with special attention on pre-hospital cooling. In the future, data from registries and surveys can help expand information regarding pre-hospital burn treatment.

Malgré une incidence mondiale élevée, la prise en charge pré- hospitalière des brûlés est éminemment variable. Les données à ce sujet sont rares en Allemagne, alors qu'une prise en charge pré- hospitalière est fondamentale pour le devenir à terme de ces patients. Nous avons donc analysé rétrospectivement les dossiers pré- hospitaliers des patients admis dans l'USI d'un CTB allemand. Environ 1/3 des patients y arrivent intubés et leur surface atteinte est plus élevée. L'hypothermie est la plupart du temps prévenue. Bien qu'utilisé chez seulement 36 patients, le refroidissement local n'a pas entraîné d'hypothermie, alors qu'il permet de réduire la mortalité (p = 0,003). L'inhalation de fumées était une indication à l'intubation et la corticothérapie, celle- ci, de moins en moins utilisée (quasiment pas dans les dernières années), n'ayant pas d'effet sur la mortalité (p = 0 ,38). Une inhalation de fumées n'a par ailleurs été objectivée que chez 50,68% des patients ayant reçu des corticoïdes. On constante que les recommandations sur la prise en charge pré- hospitalière des brûlés n'est pas appliquée, tant par les secouristes que par les urgentistes. Ainsi, le développement d'une campagne de communication à ce sujet, insistant sur le refroidissement local, est nécessaire et pourra être amendée selon de futures études rétro- et prospectives.

Patients' satisfaction with anesthesia in enzymatic debridement from a surgical perspective.

INTRODUCTION: Various clinical studies found that enzymatic debridement (EDNX) is superior to tangential excision after severe burns. The current study evaluates patients' satisfaction with pain management in EDNX with special respect to different anesthesia techniques. METHODS: Between 2015 and 2016, all patients at a department of plastic surgery were asked to complete a German-wide validated pain questionnaire. In a retrospective study design, satisfaction with pain management was compared between the control group (diagnosis from the whole field of plastic surgery except burns) and the EDNX group (burns treated with EDNX only). Analgosedation, general, regional and local anesthesia were chosen for pain management. RESULTS: In the control group 403 patients (153 females, 250 males, medium age 53 years) could be included The EDNX group included 88 patients (20 females, 68 males, medium age 38 years). The mean burn size was 5.3% TBSA. Between 0.5%-10.5% of the surface was treated with EDNX. EDNX patients could be treated under analgosedation and regional anesthesia, by topical anesthesia creme and without any anesthesia. They reported less pain during stress (p = 0.04) and were less frequently affected by motion (p = 0.024) and nausea (<0.001). However, they felt that they need more information about alternative anesthetic treatments (<0.001). CONCLUSION: EDNX can be performed sufficiently either under analgosedation, regional or local anesthesia. Thus, side effects of general anesthesia can be reduced and treatment costs can be decreased. However, it was found that neither after topical anesthetic creme nor after hand block pain treatment was sufficient.

Cholinergic synaptic inhibition of inner hair cells in the neonatal mammalian cochlea.

Efferent feedback onto sensory organs provides a means to modulate input to the central nervous system. In the developing mammalian cochlea, inner hair cells are transiently innervated by efferent fibers, even before sensory function begins. Here, we show that neonatal inner hair cells are inhibited by cholinergic synaptic input before the onset of hearing. The synaptic currents, as well as the inner hair cell's response to acetylcholine, are mediated by a nicotinic (alpha9-containing) receptor and result in the activation of small-conductance calcium-dependent potassium channels.

A molecular mechanism for electrical tuning of cochlear hair cells.

Cochlear frequency selectivity in lower vertebrates arises in part from electrical tuning intrinsic to the sensory hair cells. The resonant frequency is determined largely by the gating kinetics of calcium-activated potassium (BK) channels encoded by the slo gene. Alternative splicing of slo from chick cochlea generated kinetically distinct BK channels. Combination with accessory beta subunits slowed the gating kinetics of alpha splice variants but preserved relative differences between them. In situ hybridization showed that the beta subunit is preferentially expressed by low-frequency (apical) hair cells in the avian cochlea. Interaction of beta with alpha splice variants could provide the kinetic range needed for electrical tuning of cochlear hair cells.