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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

      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

    2. Journal article

      The Effect of Negative Pressure in the Abdominal Cavity With Suprasorb CNP on Abdominal Organs - An Experimental Study

      Frontiers in Surgery 2021 7 584926

      Since the introduction of negative pressure therapy of the abdomen, care has been taken to protect the intestine from the effects of negative pressure in order to avoid impairments of abdominal organs. As an alternative to the widespread AB-TheraR system (KCI, San Antonio, Texas, USA), the different concept of Suprasorb CNPR (Lohmann & Rauscher, Austria-Germany) was introduced by the producer with the premise of achieving a better therapeutic effect. Due to numerous pores of the film, the effects of the negative pressure are brought to the surface of the intestinal organs and these effects were tested on seven experimental animals. Particular attention was paid to the small intestine, colon, liver, and pancreas. Over 8 h continuously, three animals were tested with −80 mmHg, 4 with −60 mmHg. The results showed no macroscopic pathological changes. The histological results showed borderline changes in the small intestine and colon with −80 mmHg application, minimal or none with −60 mmHg. The liver and pancreas were found free of pathological changes. For use on human organs, the intra-abdominal application of −60 mmHg for the Suprasorb CNP system is proposed as the standard.

    3. Journal article

      Endoscopic Negative Pressure Therapy (ENPT) Is Superior to Stent Therapy for Staple Line Leak After Sleeve Gastrectomy: a Single-Center Cohort Study

      Obesity surgery 2021

      PURPOSE

      Staple line leak (SLL) is a serious complication after sleeve gastrectomy (SG). Common endoscopic treatment options include self-expandable metallic stent (SEMS), endoscopic internal drainage (EID), and endoscopic closure. The endoscopic negative pressure therapy (ENPT) is a promising treatment option combining temporary sealing of the defect with drainage of the inflammatory bed. In this study, we compare the outcome of ENPT and SEMS for the treatment of SLL following SG.

      MATERIALS AND METHODS

      A retrospective cohort of 27 patients (21 females) treated at a single center for SLL after SG was included. ENPT was primary therapy for 14 patients and compared with 13 patients treated primarily using SEMS.

      RESULTS

      ENPT was associated with a significant reduction of hospital stay (19 ± 15.1 vs. 56.69 ± 47.21 days, p = 0.027), reduced duration of endoscopic treatment (9.8 ± 8.6 vs. 44.92 ± 60.98 days, p = 0.009), and shorter transabdominal drain dwell time (15 (5-96) vs. 45 (12-162) days, p = 0.014) when compared to SEMS. Whereas endoscopic management was successful in 12/14 (85.7%) of patients from the ENPT group, SEMS was successful in only 5/13 (38.5%) of patients (p = 0.015). Furthermore, ENPT was associated with a significant reduction of endoscopic adverse events compared with SEMS (14.3% vs. 76.92% p = 0.001).

      CONCLUSION

      Compared with SEMS, ENPT is effective and safe in treating SLL after SG providing higher success rates, shorter treatment duration, and lower adverse events rates.

      PMID 33650088
    4. Journal article

      Endoscopic negative pressure therapy for upper gastrointestinal leaks:Description of a fashioned device allowing simultaneous enteral feeding

      VideoGIE 2021 6(2) 5861

      Endoscopic negative pressure therapy (ENPT) represents a modern and effective treatment strategy for gastrointestinal tract wall defects. The intracavitary treatment strategy is based on placing a sponge within the defect cavity (Fig. 1), whereas the intraluminal treatment approach is based on placing a drainage device within the visceral lumen overlapping the defect area (Fig. 2). These strategies complement each other and are successful treatments for gastrointestinal perforation and postoperative adverse events in the upper or lower GI tract.

      An open-pore film drainage (OFD) device was first described in 2015 by Loske et al3 and has been used for several indications in the upper GI tract, urinary tract, and other sites. OFD may offer several advantages in terms of easier placement, adhesiveness to the wound base, less frequent reintervention, and better fluid mobilization. In this video (Video 1, available online at www.giejournal.org), we present the assembly and placement procedure of a fashioned OFD device that allows simultaneous enteral feeding.

    5. Poster

      Establishment of a moist environment by a new foam dressing (NFD)* beneficial for wound healing in vitro

      Poster presented at EWMA 2020 18.11.2020 Virtual Conference

      Aim: Foam dressings are thought to aid in the establishment of a beneficial moist wound environment as they exhibit excellent fluid management capacity by absorbing as well as donating fluid. Therefore, a scratch wound healing model using human fibroblasts and keratinocytes was developed depending on the donation of fluid by the applied dressings. The effect on cell proliferation and migration of NFD* and cotton gauze was investigated.

       

      Methods: Human dermal fibroblasts (DF) and human epidermal keratinocytes (HaCaT) were seeded into 6-well-plates and cultivated for 48h before scratching. NFD and gauze were cut aseptically (d=3.5cm), soaked in medium and applied directly on the cell scratches without further medium addition. Cells were stained with hematoxylin/eosin after 1, 6, 24, and 48h. Scratches were photographed using a digital microscope and evaluated using the Image J program.

       

      Results: It was found that NFD supported the scratch healing in vitro by promoting fibroblast and keratinocyte proliferation and migration through establishing a moist wound environment. Results were almost comparable to the medium control. In contrast, scratches covered with gauze remained open, probably due to the loss of moisture by drying of the wound dressing.

       

      Conclusions: It could be shown that NFD is able to promote wound healing by effectively creating humid conditions favouring wound closure while gauze was not able to maintain the moist environment resulting in non-healing cell scratch wounds in vitro.

       

      *NFD - Suprasorb® P sensitive (Lohmann&Rauscher)

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    6. Poster

      THE USE OF NIGHT TIME GARMENTS FOR CHRONIC EDEMA MANAGEMENT IMPACTS PATIENTS' QUALITY OF LIFE AND EDEMA MANAGEMENT

      Poster presented at WUWHS 2020 13.09.2020 Abu Dhabi, UAE

      Background and Aims

      In the management of leg ulcers and hyperkeratosis of the surrounding skin, it is not uncommon for them to affect very large areas of the leg. The large size also leads to an increase in the level of exudate and the amount of devitalised tissue. As a result, a larger amount of material is needed to loosen and remove the devitalised tissue than is the case with smaller wounds. To evaluate the performance of this debridement pad optimised for larger wounds and the surrounding skin, a small case series was performed.

       

      Methods

      For the case series leg ulcers of various origins that needed debridement were treated once or over a longer period of time with the larger pad when indicated. The treatment was documented both photographically and in writing.

       

      Results

      Five patients between the ages of 64 and 83 were treated. All of them suffered from chronic ulcers covering a big area on their legs. At least some of the wounds were colonised with bacteria/biofilm. Two patients were suffering from hyperkeratosis, too. The debridement with the debridement pad was well tolerated by the patients. Biofilm as well as devitalised tissue were removed effectively. All wounds were healed or becoming better.

       

      Conclusions

      Most of the time one pad was sufficient, even for ulcers spreading to cover the entire gaiter area. A much larger area could be treated efficiently and quicker than it would have been possible with a smaller device. In addition, the enlargement of the device is accompanied by an increase in the absorption capacity for exudate, slough and debris.

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    7. Poster

      Mechanical debridement of leg ulcers and the surrounding skin using a monofilament fibre debridement pad designed for larger wounds and surface areas

      Poster presented at WUWHS 2020 13.09.2020 Abu Dhabi, UAE

      Background and Aims

      In the management of leg ulcers and hyperkeratosis of the surrounding skin, it is not uncommon for them to affect very large areas of the leg. The large size also leads to an increase in the level of exudate and the amount of devitalised tissue. As a result, a larger amount of material is needed to loosen and remove the devitalised tissue than is the case with smaller wounds. To evaluate the performance of this debridement pad optimised for larger wounds and the surrounding skin, a small case series was performed.

       

      Methods

      For the case series leg ulcers of various origins that needed debridement were treated once or over a longer period of time with the larger pad when indicated. The treatment was documented both photographically and in writing.

       

      Results

      Five patients between the ages of 64 and 83 were treated. All of them suffered from chronic ulcers covering a big area on their legs. At least some of the wounds were colonised with bacteria/biofilm. Two patients were suffering from hyperkeratosis, too. The debridement with the debridement pad was well tolerated by the patients. Biofilm as well as devitalised tissue were removed effectively. All wounds were healed or becoming better.

       

      Conclusions

      Most of the time one pad was sufficient, even for ulcers spreading to cover the entire gaiter area. A much larger area could be treated efficiently and quicker than it would have been possible with a smaller device. In addition, the enlargement of the device is accompanied by an increase in the absorption capacity for exudate, slough and debris.

      Products Debrisoft Pad
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    8. Poster

      Surgical treatment of extended keloid scar with dermal substitute, negative pressure wound therapy and partial thickness skin graft: A case study

      Poster presented at WUWHS 2020 13.09.2020 Abu Dhabi, UAE

      Aim

      We present the case of a young female patient, with sequela from 2nd and 3rd degree burn wounds on her legs and forearms bilaterally. Within 3 month after injury and conservative treatment, the patient developed extended keloids on the dorsal side of her left hand and forearm with functional impairment at the wrist and elbow.

       

      Method

      After the excision of the scar lesion, the full thickness skin defect was reconstructed in stages. To reconstruct a sufficient dermal layer, we locally applied a dermal substitute, initially covered with a meshed silicone sheet. To adequately steady the matrix and avoid shear stress, we used the technique of NPWT in general and a very easily manageable sleeve-like dressing* in particular.

       

      Results

      After complete healing of the graft, the patient is pain-free and no longer limited in her movements. At 1.5 years of follow-up there is no sign of recurrence for keloid.

       

      Conclusions

      The excision of large surface keloids overpassing joints and the use of a dermal matrix associated with skin grafts is a useful technique for restoring full thickness skin defects, particularly on the extremities. NPWT is known to perfectly mold the grafts to the wound. Yet, its application using gauzes or cut out foams and several pieces of transparent and self-adhering film is often difficult and time-consuming. Accordingly, NPWT that can be sealed by overlaying a sleeve simplifies the process, lowers the number of manipulations and thus speeds up the execution time.

       

      *Suprasorb CNP EasyDress - Lohmann & Rauscher

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    9. Poster

      REDUCED TISSUE FIBROSIS WITH ADDITION OF TEXTURED COMPRESSION GARMENTS TO EDEMA MANAGEMENT PROGRAM

      Poster presented at WUWHS 2020 13.09.2020 Abu Dhabi, UAE

      Background and Aims

      In the management of leg ulcers and hyperkeratosis of the surrounding skin, it is not uncommon for them to affect very large areas of the leg. The large size also leads to an increase in the level of exudate and the amount of devitalised tissue. As a result, a larger amount of material is needed to loosen and remove the devitalised tissue than is the case with smaller wounds. To evaluate the performance of this debridement pad optimised for larger wounds and the surrounding skin, a small case series was performed.

       

      Methods

      For the case series leg ulcers of various origins that needed debridement were treated once or over a longer period of time with the larger pad when indicated. The treatment was documented both photographically and in writing.

       

      Results

      Five patients between the ages of 64 and 83 were treated. All of them suffered from chronic ulcers covering a big area on their legs. At least some of the wounds were colonised with bacteria/biofilm. Two patients were suffering from hyperkeratosis, too. The debridement with the debridement pad was well tolerated by the patients. Biofilm as well as devitalised tissue were removed effectively. All wounds were healed or becoming better.

       

      Conclusions

      Most of the time one pad was sufficient, even for ulcers spreading to cover the entire gaiter area. A much larger area could be treated efficiently and quicker than it would have been possible with a smaller device. In addition, the enlargement of the device is accompanied by an increase in the absorption capacity for exudate, slough and debris.

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    10. Poster

      Providing Compression Options: The Key to Better Compliance and Concordance

      Poster presented at ALA Virtual Conference 2020 28.05.2020 Hobart, Australia

      Aim:

      Compression remains the gold standard for long-term management of chronic edema. Reviews have shown that the benefits of compression diminish according to levels of non-adherence. Reasons commonly stated for nonadherence to compression include inconvenience, heat, cost, and pain. We hypothesize that offering compression options will have positive impact on patients’ compliance and concordance to compression regimens.

       

      Method:

      Observational study performed at 2 different edema management clinics. Ten patients presenting with lower extremity swelling and history of non-compliance with previous compression regiments were observed. Objective data measured included limb volume, range of motion (ROM), functional activity status using the Timed Up and Go(TUG), and assessment of quality of life (QOL) using the Lymphoedema QOL Tool (LYMQOL-LEG). Measurements were taken at four different intervals over a minimum of 3 months. Compression options were individualized to patient's physical presentation and lifestyle for long term management of their edema.

       

      Results / Discussion:

      Compression therapy had a positive impact on all outcomes measured during the intensive phase of therapy. Follow-up outside the intensive phase of therapy demonstrated further volume loss in 6/10 subjects; Volume remained constant 3/10, increased slightly 1/10. LYMQOL scores and functional performance level maintained stable during the follow-up period.

       

      Conclusion:

      Offering multiple compression options including custom and ready-to-wear flat knit stockings*, an adjustable wrap ** and nighttime compression options*** had a positive impact on patients’ adherence to compression regimens during the study period compared to single compression modalities offered previously. Individualizing the compression regimen to each patient’s lifestyle improved their adherence to chronic edema management.

      Products Rosidal TCS
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