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Silicone and wounds

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https://www.readbyqxmd.com/read/28194352/application-of-a-silicone-sheet-in-negative-pressure-wound-therapy-to-treat-an-abdominal-wall-defect-after-necrotizing-fasciitis
#1
Jin Su Shin, Hwan Jun Choi
Necrotizing fasciitis (NF) is an aggressive soft-tissue infection involving the deep fascia and is characterized by extensive deterioration of the surrounding tissue. Immediate diagnosis and intensive treatment, including debridement and systemic antibiotics, represent the most important factors influencing the survival of NF patients. In this report, we present a case of NF in the abdomen due to an infection caused by a perforated small bowel after abdominal liposuction. It was successfully treated using negative-pressure wound therapy, in which a silicone sheet functioned as a barrier between the sponge and internal organs to protect the small bowel...
January 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28155844/enhanced-biocompatibility-of-neural-probes-by-integrating-microstructures-and-delivering-anti-inflammatory-agents-via-microfluidic-channels
#2
Bin Liu, Eric Kim, Anika Meggo, Sachin Gandhi, Hao Luo, Srinivas Kallakuri, Yong Xu, Jinsheng Zhang
OBJECTIVE: Biocompatibility is a major issue for chronic neural implants, involving inflammatory and wound healing responses of neurons and glial cells. To enhance biocompatibility, we developed silicon-parylene hybrid neural probes with open architecture electrodes, microfluidic channels and a reservoir for drug delivery to suppress tissue responses. APPROACH: We chronically implanted our neural probes in the rat auditory cortex and investigated (1) whether open architecture electrode reduces inflammatory reaction by measuring glial responses; and (2) whether delivery of antibiotic minocycline reduces inflammatory and tissue reaction...
February 3, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28129211/a-new-form-of-artificial-skin-to-promote-permanent-wound-coverage-a-preliminary-report
#3
Hsian-Jenn Wang, Lin-Gwei Wei, Chi-Hsien Wang, Ya-Chen Cheng, Junn-Liang Chang, Tai-Li Tsou, Chih-Hung Ku, Chun-Chang Li, Wen-Kuan Chiu, Chieh-Feng Chen
BACKGROUND: Although tendon-exposed or bone-exposed wounds can be resurfaced with flaps, such surgeries may not be feasible in patients with poor general or local conditions. Biosynthetic artificial skin is an alternative for critical wound coverage. We designed a new artificial skin bilayer to close difficult wounds permanently. AIM AND OBJECTIVES: This study compares incorporation and wound contraction between silicone acellular porcine dermis (SAPD) and the Integra graft (Integra Life Sciences Corp...
January 27, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28121865/sanativo-wound-healing-product-does-not-accelerate-reepithelialization-in-a-mouse-cutaneous-wound-healing-model
#4
Clement D Marshall, Michael S Hu, Tripp Leavitt, Leandra A Barnes, Alexander T M Cheung, Samir Malhotra, H Peter Lorenz, Scott L Delp, Stephen R Quake, Michael T Longaker
BACKGROUND: Sanativo is an over-the-counter Brazilian product derived from Amazon rainforest plant extract that is purported to improve the healing of skin wounds. Two experimental studies have shown accelerated closure of nonsplinted excisional wounds in rat models. However, these models allow for significant contraction of the wound and do not approximate healing in the tight skin of humans. METHODS: Full-thickness excisional wounds were created on the dorsal skin of mice and were splinted with silicone rings, a model that forces the wound to heal by granulation and reepithelialization...
February 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28111908/associated-use-of-silicone-vitamin-e-gauzes-and-%C3%AE-tocopherol-acetate-oil-in-healing-of-skin-graft-donor-sites
#5
Antonio Stanizzi, Manuela Bottoni, Caterina Tartaglione, Elisa Bolletta, Giovanni Di Benedetto
Split-thickness skin graft is one of the most used procedures in plastic surgery. This procedure involves numerous painful dressings at the donor site. α-Tocopherol acetate has anti-oxidative and anti-inflammatory properties and it can reduce the local bacterial growth, thereby promoting wound healing. We designed a prospective study to evaluate the effects of two different kinds of dressings at skin graft donor sites. A total of 30 patients were subjected to daily dressings with α-tocopherol acetate oil and traditional moist gauzes (group 1)...
January 23, 2017: International Wound Journal
https://www.readbyqxmd.com/read/28097936/experimental-study-on-tissue-phantoms-to-understand-the-effect-of-injury-and-suturing-on-human-skin-mechanical-properties
#6
Arnab Chanda, Vinu Unnikrishnan, Zachary Flynn, Kim Lackey
Skin injuries are the most common type of injuries occurring in day-to-day life. A skin injury usually manifests itself in the form of a wound or a cut. While a shallow wound may heal by itself within a short time, deep wounds require surgical interventions such as suturing for timely healing. To date, suturing practices are based on a surgeon's experience and may vary widely from one situation to another. Understanding the mechanics of wound closure and suturing of the skin is crucial to improve clinical suturing practices and also to plan automated robotic surgeries...
January 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28097806/a-silicone-rubber-membrane-with-a-specific-pore-size-enhances-cell-proliferation-and-wound-regeneration-via-the-wnt-%C3%AE-catenin-pathway
#7
Rui Xu, Yang Bai, Jian Zhao, Hesheng Xia, Yi Kong, Zhihui Yao, Rongshuai Yan, Xiaorong Zhang, Xiaohong Hu, Meixi Liu, Qingwu Yang, Gaoxing Luo, Jun Wu
A porous structure is critically important for wound dressing or tissue engineering scaffolds. However, the influence of the pore sizes on cell proliferation, tissue regeneration and the underlying mechanism remains unclear. In this study, silicone rubber membranes with different pore sizes were prepared using certain constituents of liquid silicone rubber (LSR) precursor/ liquid paraffin (LP) /hexane based on our previous studies. It was found that pore size had a significant impact on cell proliferation and wound healing...
January 17, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28043851/negative-pressure-wound-therapy-in-orthopaedic-surgery
#8
REVIEW
N Robert
Negative pressure wound therapy (NPWT) consists in applying subatmospheric pressure to a wound that is sealed off by a specially designed dressing and connected by a tube to a suction pump and drainage collection system. Skin defects are extremely common in orthopaedic and trauma surgery. NPWT is valuable across a range of indications. Proven effects include an increase in blood flow, stimulation of angiogenesis, and a decrease in wound surface area. NPWT can be used to treat post-traumatic and surgical wounds, burns, and chronic wounds such as pressure sores and ulcers...
December 30, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28017412/intracorporal-knot-tying-techniques-which-is-the-right-one
#9
Philipp Romero, Felix Nickel, Maisha Mantel, Giovanni Frongia, Alina Rossler, Karl-Friedrich Kowalewski, Beat Peter Müller-Stich, Patrick Günther
INTRODUCTION: Intracorporal knot tying (ICKT) and suturing in minimal invasive surgery (MIS) represent a key skill for advanced procedures such as Nissen fundoplication. Suture placement under tension is particularly challenging during MIS. The aim of this study was to compare ICKT of the common surgical square knot and the slipping knot on a simulated suture placement under tension. Furthermore, we objectively assessed the surgical skill of ICKT following 3hours of hands-on training...
December 20, 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28009693/importance-of-scar-prevention-and-treatment-an-approach-from-wound-care-principles
#10
Leonardo Marini, Derek Odendaal, Sergey Smirnyi
BACKGROUND: The increased number of cosmetic surgical and nonsurgical procedures has led to a greater demand to achieve aesthetically acceptable scars. Silicone gel (SG) dressings were evaluated in these cases following the principles of wound care and also minimizing abnormal scar formation. PATIENTS AND METHODS: A newly developed solution in wound care in the form of a SG has proven to be a highly effective treatment for a series of 4 clinically challenging cases presented in this article: postprocedure healing after a laser treatment, nonhealing scalp wounds, chronic relapsing xerotic eczematous cheilitis, and the treatment of scars caused by third degree burns...
January 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/27986365/silicon-dioxide-polyvinylpyrrolidone-as-a-wound-dressing-for-skin-defects-in-a-murine-model
#11
Ferenc Öri, Richard Dietrich, Cornelia Ganz, Michael Dau, Daniel Wolter, Annika Kasten, Thomas Gerber, Bernhard Frerich
OBJECTIVE: There is a high demand for temporary wound dressings that improve wound healing and regeneration. Silicon (as SiO2) has been shown to support the growth and collagen formation in biological systems. METHODS: A nanocomposite was made from PVP (polyvinylpyrrolidon), nano-sized silica aggregates and water and served for fabrication of a wet dressing material (SiO2-PVP gel, by cross-linking the gel) and a freeze-dried dressing material (SiO2-PVP fleece). Materials were characterized by SAXS, DSC, EDX and viscosity measurements...
January 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27871930/reconstruction-of-penile-shaft-defects-following-silicone-injection-by-bipedicled-anterior-scrotal-flap
#12
Richard Fakin, Simon Zimmermann, Sirachai Jindarak, Nicole Lindenblatt, Pietro Giovanoli, Poonpissamai Suwajo
PURPOSE: Numerous causalities, including attempts at penile augmentation with silicone or paraffin, can lead to extensive circular penile shaft defects. Reconstruction is challenging and skin grafting is a suboptimal option despite its widespread use. We present a surgical technique for penile shaft reconstruction with a bipedicled anterior scrotal flap. MATERIALS AND METHODS: A retrospective data analysis was performed of patients treated for symptomatic penile siliconomas who underwent subsequent penile reconstruction with a bipedicled anterior scrotal flap between 2010 and 2015...
November 18, 2016: Journal of Urology
https://www.readbyqxmd.com/read/27869355/delivery-of-flightless-i-neutralizing-antibody-from-porous-silicon-nanoparticles-improves-wound-healing-in-diabetic-mice
#13
Christopher T Turner, Steven J P McInnes, Elizabeth Melville, Allison J Cowin, Nicolas H Voelcker
Flightless I (Flii) is elevated in human chronic wounds and is a negative regulator of wound repair. Decreasing its activity improves healing responses. Flii neutralizing antibodies (FnAbs) decrease Flii activity in vivo and hold significant promise as healing agents. However, to avoid the need for repeated application in a clinical setting and to protect the therapeutic antibody from the hostile environment of the wound, suitable delivery vehicles are required. In this study, the use of porous silicon nanoparticles (pSi NPs) is demonstrated for the controlled release of FnAb to diabetic wounds...
November 21, 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/27820589/management-of-a-patient-with-toxic-epidermal-necrolysis-using-silicone-transfer-foam-dressings-and-a-secondary-absorbent-dressing
#14
Kimberly D McCarthy, Rachel M Donovan
BACKGROUND: Toxic epidermal necrolysis (TEN) is an exfoliative disorder of the skin usually caused by a drug reaction. The primary goal of wound care for patients with TEN is prevention of further mechanical trauma to the skin, along with management of wound infection. CASE: A 77-year-old woman with TEN was successfully managed with a perforated silver soft contact foam and a superabsorbent outer layer. Topical therapy combined nanoparticle silver for management of wound infection and minimized trauma to the skin as only the outer layer needed to be changed...
November 2016: Journal of Wound, Ostomy, and Continence Nursing
https://www.readbyqxmd.com/read/27812471/toward-multiplexing-detection-of-wound-healing-biomarkers-on-porous-silicon-resonant-microcavities
#15
Fransiska Sri Herwahyu Krismastuti, Alex Cavallaro, Beatriz Prieto-Simon, Nicolas H Voelcker
Bacterial wound infections can cause septicemia and lead to limb amputation or death. Therefore, early detection of bacteria is important in chronic wound management. Here, an optical biosensor based on porous silicon resonant microcavity (pSiRM) structure modified with fluorogenic peptide substrate is demonstrated to detect the presence of Sortase A (SrtA), a bacterial enzyme found in the cell membrane protein of Staphylococcus aureus. The combination of fluorescence enhancement effects of the pSiRM architecture with the incorporation of SrtA fluorogenic peptide substrate within the pSi matrix enables the sensing of SrtA with an outstanding limit of detection of 8 × 10(-14) m...
June 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27798620/microrna-21-preserves-the-fibrotic-mechanical-memory-of-mesenchymal-stem-cells
#16
Chen Xi Li, Nilesh P Talele, Stellar Boo, Anne Koehler, Ericka Knee-Walden, Jenna L Balestrini, Pam Speight, Andras Kapus, Boris Hinz
Expansion on stiff culture substrates activates pro-fibrotic cell programs that are retained by mechanical memory. Here, we show that priming on physiologically soft silicone substrates suppresses fibrogenesis and desensitizes mesenchymal stem cells (MSCs) against subsequent mechanical activation in vitro and in vivo, and identify the microRNA miR-21 as a long-term memory keeper of the fibrogenic program in MSCs. During stiff priming, miR-21 levels were gradually increased by continued regulation through the acutely mechanosensitive myocardin-related transcription factor-A (MRTF-A/MLK-1) and remained high over 2 weeks after removal of the mechanical stimulus...
October 31, 2016: Nature Materials
https://www.readbyqxmd.com/read/27790732/root-coverage-using-porcine-collagen-matrix-with-fibroblast-growth-factor-2-a-pilot-study-in-dogs
#17
Jae Kook Cha, Yoo-Kyung Sun, Jung-Seok Lee, Seong-Ho Choi, Ui-Won Jung
AIM: The aim of this study was to evaluate the effect of fibroblast growth factor-2 (FGF-2) in combination with porcine collagen matrix (CM) for coverage of gingival recession defects in dogs. MATERIALS AND METHODS: In five male mongrel dogs, labial gingival recession defects were surgically created in the lower-third incisors bilaterally. The defects were randomly assigned to the CM/FGF-2 group (experimental) or the CM-only group (control). Standardized clinical photographs and silicone impressions were taken at 4 and 16 weeks of healing to calculate the remaining recession area...
January 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/27767980/hemorheological-factors-can-be-informative-in-comparing-treatment-possibilities-of%C3%A2-abdominal-compartment-syndrome
#18
Norbert Nemeth, Katalin Peto, Adam Deak, Viktoria Sogor, Gabor Varga, Bence Tanczos, Klaudia Balog, Adrienn Csiszko, Zoltan Godo, Zsolt Szentkereszty
BACKGROUND: Abdominal compartment syndrome (ACS) is a life-threatening condition, of which pathomechanism hasn't been completely clarified, yet. Furthermore, surgical therapy still needs optimization. OBJECTIVE: We aimed to investigate microcirculatory and micro-rheological alterations in ACS, using various temporary abdominal closure methods, including three settings of vacuum-assisted closure technique (negative pressure wound therapy, NPWT). METHODS: On anesthetized pigs, by intraabdominally placed and filled-up silicone bags, intraabdominal pressure at 30 mmHg was maintained for 3 hours, and afterwards, decompressive laparotomy happened...
2016: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/27766402/management-of-implant-exposure-in-one-stage-breast-reconstruction-using-titanium-coated-polypropylene-mesh-sub-mammary-intercostal-perforator-flap
#19
Michele Antonio De Riggi, Nicola Rocco, Giulio Gherardini, Emanuela Esposito, Massimiliano D'Aiuto
INTRODUCTION: One-stage implant-based breast reconstruction using titanium-coated polypropylene mesh is a novel approach widely used in Europe. Complication rates in breast reconstruction with the use of titanium-coated meshes seem to be comparable to those in patients with implant-based breast reconstruction alone. However, the use of synthetic meshes in implant-based breast reconstructive surgery leads to new clinical scenarios with the need for the breast surgeon to face new complications...
December 2016: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/27743199/arginine-silicate-inositol-complex-accelerates-cutaneous-wound-healing
#20
Ali Said Durmus, Mehmet Tuzcu, Oguzhan Ozdemir, Cemal Orhan, Nurhan Sahin, Ibrahim Hanifi Ozercan, James Richard Komorowski, Shakir Ali, Kazim Sahin
Arginine silicate inositol (ASI) complex is a composition of arginine, silicon, and inositol that has been shown to have beneficial effects on vascular health. This study reports the effects of an ASI ointment on wound healing in rats. A full-thickness excision wound was created by using a disposable 5 mm diameter skin punch biopsy tool. In this placebo-controlled study, the treatment group's wound areas were covered by 4 or 10 % ASI ointments twice a day for 5, 10, or 15 days. The rats were sacrificed either 5, 10, or 15 days after the wounds were created, and biopsy samples were taken for biochemical and histopathological analysis...
October 14, 2016: Biological Trace Element Research
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