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    Our research and development teams operate at a global level and generate synergies from our collective expertise and by drawing on related disciplines. We are also constantly exchanging information at an international level with independent technical institutions, key opinion leaders and multipliers in order to be able to ensure cooperation and knowledge management of the highest order. As part of this process, we also conduct extensive research, the results of which we continually present in workshops, at conferences and symposiums - either in documentation or talks given by our cooperation partners - and also publish in renowned scientific journals. This database contains a large number of these evidence-based scientific articles, most of which have been evaluated by independent assessors:

    1. Journal article

      Alveolar iodine tampon packing after impacted third molar surgery improves oral health-related quality of life and postoperative sequela: a randomized study

      Oral and maxillofacial surgery 2021 25(2) 181190


      The aim of this study was to evaluate the effect of an iodine tampon on postoperative discomfort after surgical removal of a mandibular third molar.


      Patients were randomly assigned to two groups: one group received an alveolar iodine-containing tampon in the extraction socket (N = 44), and the other group used a disposable syringe (Monoject®) to rinse the wound (N = 43). Postoperative discomfort was assessed with the Oral Health Impact Profile-14 (OHIP-14) questionnaire, Pain Intensity Numerical Rating Scale (PI-NRS), and questions about self-care and discomfort.


      This study included 87 patients (52 women and 35 men) with an average age of 26.47 years (SD, 6.36). The mean OHIP-14 sum scores were significantly lower in the iodine tampon group compared with the Monoject® syringe group. Mean PI-NRS scores significantly differed between the iodine tampon group (3.33; SE, 0.27) and Monoject® syringe group (4.46; SE, 0.27) (F (1, 85) = 8.16, p < 0.01), with no interaction effect between time and PI-NRS (F (6, 510) = 1.26, p = 0.28). Patients in the iodine tampon group reported less postoperative discomfort.


      Insertion of an iodine-containing tampon in the postoperative socket reduced the pain and impact on oral health-related quality of life during the first postoperative week and positively influenced postoperative sequelae.

      Products Opraclean
      PMID 32862256
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    2. Journal article

      In vitro Activity of Antimicrobial Wound Dressings on P. aeruginosa Wound Biofilm

      Frontiers in microbiology 2021 12 664030

      The treatment of acute and chronic infected wounds with residing biofilm still poses a major challenge in medical care. Interactions of antimicrobial dressings with bacterial load, biofilm matrix and the overall protein-rich wound microenvironment remain insufficiently studied. This analysis aimed to extend the investigation on the efficacy of a variety of antimicrobial dressings using an in vitro biofilm model (lhBIOM) mimicking the specific biofilm-environment in human wounds. Four wound dressings containing polyhexanide (PHMB), octendine di-hydrochloride (OCT), cadexomer-iodine (C-IOD) or ionic silver (AG) were compared regarding their antimicrobial efficacy. Quantitative analysis was performed using a quantitative suspension method, separately assessing remaining microbial counts within the solid biofilm as well as the dressing eluate (representing the absorbed wound exudate). Dressing performance was tested against P. aeruginosa biofilms over the course of 6 days. Scanning electron microscopy (SEM) was used to obtain qualitative visualization on changes in biofilm structure. C-IOD demonstrated superior bacterial reduction. In comparison it was the only dressing achieving a significant reduction of more than 7 log10 steps within 3 days. Neither the OCT- nor the AG-containing dressing exerted a distinct and sustained antimicrobial effect. PHMB achieved a non-significant microbicidal effect (1.71 ± 0.31 log10 steps) at day 1. Over the remaining course (6 days) it demonstrated a significant microbistatic effect compared to OCT, AG and the control. Quantitative results in the dressing eluate correlate with those of the solid biofilm model. Overall, AG- and OCT-containing dressings did not achieve the expected anti-biofilm efficacy, while C-IOD performed best. Chemical interaction with the biofilms extrapolymeric substance (EPS), visualized in the SEM, and dressing configuration (agent concentration and release pattern) are suspected to be responsible. The unexpected low and diverse results of the tested antimicrobial dressings indicate a necessity to rethink non-debridement anti-biofilm therapy. Focussing on the combination of biofilm-disruptive (for EPS structure) and antimicrobial (for residing microorganisms) features, as with C-IOD, using dehydration and iodine, appears reasonably complementary and an optimal solution, as suggested by the here presented in vitro data.

      PMID 34054768
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    3. Journal article

      Endoscopic negative pressure therapy for a broad rectal fistula using pull-through open-pore film and polyurethane foam drains

    4. Journal article

      Effect of Negative Pressure Therapy on Open Abdomen Treatments. Prospective Randomized Study With Two Commercial Negative Pressure Systems

      Frontiers in Surgary 2021 7 596056

      The use of negative pressure dressings for open abdominal therapy has made a great impact on strategies for open abdominal treatment. Observed intestinal damage and developement of fistula formation raises questions about safety of commonly used systems (AB-Thera). The most common used system uses foils for shielding intestines directly from negative pressure. As an alternative a system with open pore dressing in double layer film was introduced (Suprasorb CNP) and proved to safe in animal studies. We compared the effects of this two systems on patients requiring open abdominal treatment.Materials and methods: Patients with secondary peritonitis in at least two abdominal quadrants were included in this randomized study. Inclusion criteria were secondary peritonitis (ACS), abdominal compartment syndrome, and abdominal trauma combined with ACS and/or contaminated abdomen. Patients with active bleeding and pancreatitis were not included. We examined Mannheim peritonitis Index (MPI), bloodcount, PCT, amount of fluid collected, and morphological changes on the bowel. Data were collected on day 2, 4, 7, 14, 21, and 28. Primary end point was fascial closure. Examination was terminated in case of death and damage to the abdominal organs. Groups were compared using Mann Whitney U-test and chi square test. Trend evaluation was evaluated using an one way repeated measure analysis of variance. P-values below 0.05 was

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    5. Journal article

      Suprasorb® P sensitive: A 51-wound clinical evaluation

      Wounds UK 2021 17(3) 9198

      Dressings continue to be a key part of successful wound care, however, choosing the right product for the right patient at the right time can be challenging for the clinician (Hedger, 2014). Modern foam dressings have been widely available since the mid-1970s with the aim to manage light-to-heavy exuding wounds (Hedger et al, 2014). Historically, bordered foam dressings have utilised acrylic-based adhesives; however, these have been associated with increased risk of skin sensitisation and medical adhesive-related skin injuries (MARSI; Meuleneire and Rucknagel, 2013; Hedger et al, 2014; Mestach et al, 2018; Downie and Collier, 2021). A clinical evaluation was undertaken to detail the characteristics and performance of Suprasorb® P sensitive silicone foam dressing (L&R Healthcare). The evaluation comprised a minimum of four dressing changes over at least 2 weeks. Fifty patients (51 wounds) were included in the evaluation. At the final evaluation, 57% (n=29) of the wounds were recorded as improved, 37% (n=19) were recorded as static and 6% (n=3) were recorded as having deteriorated. Of the 27% (n=14) evaluations where patients reported self caring, 71% scored Suprasorb P sensitive as above average for ease of use, suggesting the dressing may be suitable for patients who were self-caring and can apply their own dressing. Suprasorb P sensitive performed well in all the parameters evaluated and may be considered where effective exudate handling, improved patient comfort and ease of handling is required.

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    6. Journal article

      Closure of a duodenal cutaneous fistula with endoscopic negative pressure therapy using a thin open-pore film drain - an easy tool and simple method

      Endoscopy 2021

      A 57-year-old patient underwent emergency laparotomy for an acute abdomen with free intra-abdominal air caused by a perforated distal gastric ulcer. Surgical closure was performed by suture. Histological adenocarcinoma was found Therefore, revision laparotomy with distal gastric resection and Roux-en-y reconstruction was done 3 days later. At 6 days postoperatively, a discharge of biliary secretions via target drainage for duodenal stump insufficiency was seen. Surgical closure was tried in another revision laparotomy. But again biliary secretion occurred proving the persistent duodenal leakage.

      Passive drainage via the operative drain was sufficient to avoid development of an acute abdomen, therefore the duodenal secretions were drained passively. Secretion of 100–200 ml daily persisted for 21 days with formation of a duodenal cutaneous fistula channel ([Fig. 1]).

      Then, treatment was switched to active drainage management with endoscopic negative pressure using an open-pore film drain. The drain was made by wrapping a strip of thin, double-layered, open-pore film (Suprasorb CNP Drainage Film; Lohmann & Rauscher, Rengsdorf, Germany) around the distal drainage end and fixing it with a suture [1] [2] [3] [4] [5] ([Fig. 2]). This created a small-bore open-pore drainage tube to which negative pressure could be applied. The open-pore film drain used had a diameter of only 5 mm. The length of the drainage element was 10 cm. The drain was simply manually inserted in the cutaneous opening into the pre-existing 12-cm-long fistula channel. Suction of –125 mmHg was applied (ACTIV.A.C; KCI, San Antonio, Texas, USA). The secretion stopped immediately. After 4 days, endoscopic negative pressure treatment was terminated. The open-pore film drain was removed by pulling out the tube ([Fig. 3]). Endoscopic inspection of the fistula channel showed the typical suction effects ([Fig. 4]), with the regular pore structure of the open-pore membrane ([Video 1]). The fistula was closed. The open-pore film drain is a simple device that can be used to achieve duodenal cutaneous fistula closure very easily by negative pressure in appropriate cases.

      PMID 34624919
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    7. Journal article

      Debridement: When, How, and Why?

    8. Journal article

      Endoscopic negative pressure therapy (ENPT) of a spontaneous oesophageal rupture (Boerhaave's syndrome) with peritonitis - a new treatment option

      Innovative Surgical Sciences 2021 6(2) 8186


      Boerhaave's syndrome is a life-threatening disease with high mortality and morbidity. Endoscopic negative pressure therapy (ENPT) can be used to treat oesophageal perforations.

      Case presentation

      We report on a case of oesophageal rupture with peritonitis in a 35-year-old male patient. The start of treatment was 11 h after the perforation event. The treatment of the perforation defect was performed exclusively by intraluminal ENPT, the treatment of peritonitis was performed by laparotomy with abdominal lavage. For ENPT we used two different types of open-pore drains. The first treatment cycle of four days was performed with an open-pored polyurethane foam drainage (OPD), which was placed intraluminal to cover the perforation defect and to empty the stomach permanently. The second treatment cycle of nine days was performed with a thin nasogastric tube like double-lumen open-pored film drainage (OFD). For suction OPD and OFD were connected with an electronic vacuum pump (-125 mmHg). OFD enables active gastric emptying with simultaneous intestinal feeding via an integrated feeding tube. Intraluminal ENPT with a total treatment duration of 13 days was able to achieve the complete healing of the defect. Surgical treatment of the perforation defect was not necessary. The patient was discharged 20 days after initial treatment with a non-irritating abdominal wound and a closed perforation.


      In suitable cases, endoscopic negative pressure therapy is a minimally invasive, organ-preserving procedure for the treatment of spontaneous oesophageal rupture.

      PMID 34589575
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    9. Journal article

      Endoscopic negative pressure therapy for a broad rectal fistula using pull-through open-pore film and polyurethane foam drains

    10. Journal article

      Endoskopische Vakuumtherapie der Anastomoseninsuffizienz – Schritt für Schritt

      Gastroenterologie up2date 2021 93 498

      Die endoskopische Vakuumtherapie (EVT) ist ein fester Bestandteil der Therapie postoperativer Anastomoseninsuffizienzen im Gastrointestinaltrakt. In jüngster Zeit wird die EVT auch bei anderen Indikationen wie Perforationen, endoskopisch zugänglichen Abszessen oder enterokutanen Fisteln mit Erfolg angewendet. Dieser Beitrag erläutert schrittweise den Gebrauch der EVT und zeigt die Möglichkeiten, aber auch Risiken und Grenzen der Therapie auf.

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