Physical and barrier changes in gastrointestinal mucus induced by the permeation enhancer sodium 8-[(2-hydroxybenzoyl)amino]octanoate (SNAC).

Drug delivery systems (DDS) for oral delivery of peptide drugs contain excipients that facilitate and enhance absorption. However, little knowledge exists on how DDS excipients such as permeation enhancers interact with the gastrointestinal mucus barrier. This study aimed to investigate interactions of the permeation enhancer sodium 8-[(2-hydroxybenzoyl)amino]octanoate (SNAC) with ex vivo porcine intestinal mucus (PIM), ex vivo porcine gastric mucus (PGM), as well as with in vitro biosimilar mucus (BM) by profiling their physical and barrier properties upon exposure to SNAC. Bulk mucus permeability studies using the peptides cyclosporine A and vancomycin, ovalbumin as a model protein, as well as fluorescein-isothiocyanate dextrans (FDs) of different molecular weights and different surface charges were conducted in parallel to mucus retention force studies using a texture analyzer, rheological studies, cryo-scanning electron microscopy (cryo-SEM), and single particle tracking of fluorescence-labelled nanoparticles to investigate the effects of the SNAC-mucus interaction. The exposure of SNAC to PIM increased the mucus retention force, storage modulus, viscosity, increased nanoparticle confinement within PIM as well as decreased the permeation of cyclosporine A and ovalbumin through PIM. Surprisingly, the viscosity of PGM and the permeation of cyclosporine A and ovalbumin through PGM was unaffected by the presence of SNAC, thus the effect of SNAC depended on the regional site that mucus was collected from. In the absence of SNAC, the permeation of different molecular weight and differently charged FDs through PIM was comparable to that through BM. However, while bulk permeation of neither of the FDs through PIM was affected by SNAC, the presence of SNAC decreased the permeation of FD4 and increased the permeation of FD150 kDa through BM. Additionally, and in contrast to observations in PIM, nanoparticle confinement within BM remained unaffected by the presence of SNAC. In conclusion, the present study showed that SNAC altered the physical and barrier properties of PIM, but not of PGM. The effects of SNAC in PIM were not observed in the BM in vitro model. Altogether, the study highlights the need for further understanding how permeation enhancers influence the mucus barrier and illustrates that the selected mucus model for such studies should be chosen with care.

Perineal Diagnostic Microbial Swabs As A Predictive Parameter In Pediatric Burn Injury.

The aim is to evaluate the predictive usefulness of perineal diagnostic microbial swabs (PDMS) which will identify an enteric reservoir as possible source of concomitant wound infection following scald burn injury in infants. Perineal swabs were taken on admission of infants presenting with scald burn injury along with a standardized protocol of initial sterile surgical field cleansing and dressing. Complicated (CC) and uncomplicated (UC) clinical cases were discriminated based on parameters of significant microbial burn wound colonization, such as onset of fever, white blood cell count (WCC), C-reactive protein (CRP) and a concomitant need for surgical wound revision with/without guided antibiotic therapy. Relative risks (RR) / odds ratios (OR) based on microbial swab results were calculated related to anticipated wound infection. We found PDMS to be an independent predictive parameter for clinically relevant microbial wound colonization in pediatric patients (n=274; age 2.81±2.69). Most importantly, we show that in patients with initial total burn surface area (TBSA) >5%, clinically relevant burn wound infection requiring intervention can be predicted from initial perineal swab results with ORs ~10fold. Infants presenting with scald burn injury are exposed to a relevant risk of wound infection emanating from a unique microbial enteric reservoir, even with initial surgical decontamination and sterile dressing protocols, warranting further hospitalization. Based on our findings we suggest PDMS as a useful additional predictive parameter to (i) characterize the relevant enteric microbial reservoir and (ii) direct further therapeutic measures with the aim of preventing complicated wound infections, including preemptive aseptic wound dressings, guided antibiotic therapy and surgical wound revision.

Cette étude a pour but d'évaluer l'intérêt de la surveillance par écouvillonnage du microbiote périnéal comme reflet du microbiote digestif, susceptible de contaminer les brûlures par ébouillantement chez l'enfant. Le prélèvement était réalisé à l'entrée des enfants par ailleurs bénéficiant d'un traitement standard de pansements stériles. Les brûlures étaient considérées comme compliquées devant un syndrome septique (fièvre, hyperleucocytose, augmentation de la CRP) d'origine locale (nécessité de pansement chirurgical) et l'antibiothérapie pouvait être guidée par le prélèvement initial. Nous avons calculé risque relatif et Odds Ratio d'infection de brûlure selon le résultat de l'écouvillonnage, qui s'est avéré, quand il est positif, multiplier par 10 le risque d'infection locale. Les enfants ébouillantés ont un risque d'infection par bactéries d'origine digestive clairement augmenté en cas de colonisation périnéale, même avec des pansements réalisés en conditions stériles. Nous suggérons donc la réalisation d'une cartographie bactérienne périnéale initiale chez ces patients afin d'évaluer le risque d'infection locale et de guider le traitement (type de pansement, antibiothérapie, pansement chirurgical).

Early Functional Treatment and Modern Cast Making for Indications in Hand Surgery.

Cast treatment can serve both as a nonsurgical treatment option and as a means for providing postoperative protection. However, with the duration of immobilization intervals, the benefits of cast treatment, especially in hand surgery, are at risk of being outweighed by undesired drawbacks such as joint stiffening and contracture formation. In order to minimize potential complications commonly associated with cast treatment, efforts to further improve cast making must attempt to reconcile two conflicting objectives: (1) to achieve stability and rigidity at the site of injury (e.g., fracture retention) and (2) to allow free range of joint movement as early as possible. In addition, in order to assure patient compliance, modern cast treatments should aim to improve wearing-comfort of the cast. This paper describes modern cast designs for four common types hand injuries, with sample cases highlighting the clinical outcome of each treatment.

[Research Assessment in Plastic and Reconstructive Surgery on a National Level: A 5-Years Systematic Review of Research Activity in German University Hospitals]. / Eine Analyse der Forschungsaktivität universitärer Kliniken für Plastische Chirurgie im nationalen Vergleich: Eine systematische 5-Jahres Evaluation der Forschungsaktivität in Deutschland.

BACKGROUND: In plastic surgery, a broad spectrum of research activity has been performed over the past decade. However, compared with other medical fields, there seems to be a lack of central coordination in the individual research areas. Also no comprehensive, periodical assessment has been undertaken to date. This study aims to provide an overview of German research activity in plastic surgery departments affiliated to medical universities. METHODS: We performed a 5-year interval (01/2010-12/2014) survey of PubMed-listed publications of plastic surgery departments in German university hospitals. For each university (n=11), statistical analyses of the following parameters were performed: distribution of research fields, number of publications, annual cumulative impact sum (IS) and impact factor (IF). RESULTS: For the above-mentioned period, a total of n=904 publications were analysed. Ranking among academic departments was as follows: number of publications: 1. Medizinische Hochschule Hannover 178 (annual average x̅=36/median x͂=34; 2. University Hospital of Erlangen 115 (x̅=23/x͂=23); 3. Bergmannsheil Bochum 90 (x̅=18/x͂=19). The annual impact sum (IS) averaged 33.51 (SD 11.088, p<0.05); separated IS: 1. Medizinische Hochschule Hannover x̅=74.66, x͂=62.22, 2. University Hospital of Erlangen x̅=53.24, x͂=50.84, 3. University Hospital RWTH Aachen x̅=46.12, x͂=44.67. The average impact factor per publication was: 1.98 (SD 0.31, p<0.05); separated IF: 1. University Hospital RWTH Aachen x̅=2.76, x͂=2.79; 2. University Hospital of Erlangen x̅=2.34, x͂=2.46; 3. Medizinische Hochschule Hannover x̅=2.08, x͂=2.05. The analysed publications were distributed as follows: 43% reviews, 20% cell biology/tissue engineering, 10% reconstruction, 27% others (including wound healing, vessel/nerve research, hand surgery, burn, aesthetics, oncology). CONCLUSION: Based on this comprehensive analysis, it seems that a periodical assessment of current research activity would be useful for the future. Data assessments should be started on European and international levels and should also be applied to other surgical and medical disciplines.

Extensive burn injury caused by fundamental electronic cigarette design flaw.

Currently, electronic cigarette (EC) devices are widely used as an alternative to conventional smoking. The underlying technical principle is an electric coil-based vaporizer unit, which vaporizes various solutions for inhalation purposes with a rechargeable lithium battery unit as power source. We report a case of extensive burn injury resulting from the thermal explosion of a battery unit within an EC device. Though internal thermal instabilities of lithium ion batteries are a known safety issue, the unique feature here is a pronounced amplification of the extent of burn injury due to an additional scalding burn mechanism that resulted from heating of the liquid reservoir adjacent to the battery. Thus, we demonstrate a relevant design flaw in various EC devices, which in the authors' opinion needs to be addressed both by manufacturers and safety regulations.

Les cigarettes électroniques sont de nos jours très largement utilisées comme alternative au tabagisme. Le principe est la vaporisation aux fins d'inhalation d'un liquide chauffé par une résistance alimentée par une batterie au lithium, rechargeable. Nous rapportons un cas de brûlure étendue causée par l'explosion de la batterie, surchauffée. Si le risque d'explosion des batteries au lithium est bien connu en cas de surchauffe, la particularité ici est que le patient a en outre été ébouillanté par le e-liquide dont le réservoir était très proche de la batterie. Nous montrons ici un défaut de conception de certaines cigarettes électroniques qui devrait être pris en compte par les fabricants et les autorités.

Conservative scoliosis treatment in patients with Prader-Willi syndrome.

UNLABELLED: Patients with Prader-Willi syndrome often suffer from scoliosis of major degrees. Due to current literature surgical intervention seems the gold standard of treatment although the rate of complications in this condition are reported to be significantly higher than in patients with Adolescent Idiopathic Scoliosis. Purpose of this study was to reveal the effects of conservative treatment in this rare patient population. MATERIALS AND METHODS: A case series of patients with this condition has been investigated to estimate as to whether Prader-Willi patients with scoliosis may benefit from conservative scoliosis management. 9 Patients with this condition have been found in our out-patient database. 5 of these retarded patients (3 girls, two boys) today are 19 years and older and therefore are without any significant residual growth. Average Cobb angle was 47 degrees (34 - 66 degrees) at 12 years, average observation time was 6.4 years. RESULTS: Two of the five patients progressed. Average Cobb angle after follow-up was 52 degrees. No progression beyond 70 degrees has been found after cessation of growth. In one patient the curve deteriorated clearly after reducing brace wearing time and therefore was due to non-compliance. CONCLUSIONS: Stabilisation of scoliosis due to Prader-Willi syndrome is possible by means of conservative management. To expose this patient population to the risks of surgical management seems not to be justified.

[Free scapular or parascapular flaps for soft tissue damage accompanying talus or calcaneus fractures]. / Freier Paraskapular-/Skapularlappen bei frakturbegleitendem Weichteildefekt an Talus oder Kalkaneus.

BASIS: Fractures of the talus or calcaneus with accompanying soft tissue damage require precisely planned treatment to prevent infection of the wound over time, especially in severely injured patients. MATERIAL AND METHODS: Seven patients with fractures of the talus or calcaneus and accompanying 2nd and 3rd degree open or 3rd degree closed soft tissue injuries were followed up retrospectively. These patients were operated on between January 1999 and January 2006 with free fasciocutaneous scapular or parascapular flaps. The average age was 34 (range 16-54). Follow-up was at 6-36 months. RESULTS: Osteosynthesis was primarily in six cases, post-primarily in one, and in four cases exterior fixation was used additively. Temporary vacuum therapy was performed for a mean of 28 days (6-42). Parascapular, scapular, and Latissimus dorsi flap coverage was performed six, one, and one times, respectively. Six flaps healed without complication. One necrosis of a parascapular flap occurred and made a Latissimus dorsi flap necessary. In one case of donor-site wound dehiscense, a local rotation flap became necessary. There was no joint infection or osteomyelitis. Bony consolidation was achieved within all fractures. CONCLUSION: Traumatic soft tissue damage must be taken into account when primary or secondary internal fixation is performed and should influence the choice of implant. Free fasciocutaneous parascapular or scapular flaps are a powerful tool for preventing infection if local flaps are not sufficient to achieve stable soft tissue coverage.

The acceptability of isoflavones as a treatment of menopausal symptoms: a European survey among postmenopausal women.

OBJECTIVE: To investigate determinants of the acceptability of isoflavone products among postmenopausal women with regard to social and lifestyle factors, dietary habits, health concerns, food beliefs, menopausal symptoms and therapies, and to elucidate preferences for specific products. METHODS: A consumer survey was conducted among postmenopausal women in four European countries (Germany, Denmark, Italy and the UK), including a total of 465 respondents. RESULTS: The declared acceptability of isoflavones was highest in Germany (80%), followed by Italy (75%), the UK (59%) and Denmark (55%; p < 0.001). Among other factors, prior information about isoflavones (odds ratio (OR) 2.64, 95% confidence interval (CI) 1.54-4.51, p < 0.001) and belief that foods can be used to treat medical conditions (OR 2.18, 95% CI 1.17-4.05, p = 0.014) were the strongest predictors of potential acceptability. The preferred forms in which isoflavones might be taken differed markedly between countries. CONCLUSIONS: Information about the health effects of isoflavones and health-diet links should be considered the most important factors in attempts to influence the potential acceptability of isoflavone products. Foods enriched with isoflavones need to be developed with regard to specific cultural demands in order to assure consumer acceptance on the marketplace.