Hypertrophic scars (HTSs) result from excessive collagen accumulation and impaired wound remodelling, leading to considerable aesthetic and functional concerns. Despite the availability of various treatment strategies, their clinical success remains limited, emphasising the need for alternative approaches. Human amniotic fluid (hAF), naturally enriched with cytokines and growth factors, has emerged as a promising biological material for tissue regeneration. This study investigated the therapeutic potential of two forms of hAF—pooled-frozen and pooled-frozen gamma-irradiated—in a rat model of hypertrophic scarring. Fifteen adult male Sprague–Dawley rats were randomly assigned to receive subcutaneous injections of either saline, pooled-frozen hAF, or pooled-frozen gamma-irradiated hAF at the wound margins on days 1, 3 and 5 following the induction of hypertrophic scars via talc powder application. After 21 days, wound healing was evaluated through histological and immunohistochemical analyses. Both treatment groups demonstrated significantly improved wound healing compared to the control group. Granulation tissue formation was enhanced in the treated groups, particularly in animals receiving gamma-irradiated fluid, which also showed superior collagen remodelling characterised by aligned and mature collagen bundles. Both treatment groups demonstrated an increase in M2 macrophage density, as evidenced by elevated Arg+/CD68+ cell ratios; however, this effect was more pronounced in the gamma-irradiated group, indicating a stronger shift towards a regenerative immune profile. Enhanced reepithelialisation, increased hair follicle density and reduced scar thickness were also observed. These findings suggest that gamma-irradiated hAF provides a more effective and minimally invasive therapeutic option for modulating scar formation and improving wound healing outcomes, supporting its potential translation into clinical applications for the management of hypertrophic scars.
Skin allografts are essential in managing complex wounds, yet their availability is limited by low post-mortem donation rates. Skin harvested during body contouring surgeries offers a novel and sustainable source to expand tissue supply. We conducted a retrospective descriptive study at the Tarapacá Skin and Tissue Bank from January 2022 to December 2024. All donations from body contouring surgeries were processed as cryopreserved total skin allografts following national tissue banking standards. Variables included donor demographics, harvested area, units produced, microbiological results, and discard rates. To describe clinical performance, we present our group's initial clinical series of treated patients. From 248 living donors (mean age 41.3 years), 81 293 cm2 of skin generated 2050 units. The discard rate was 27%, mainly due to a storage failure and isolated microbial contamination. Clinically, all patients achieved complete initial graft take, followed by gradual necrotic eschar formation at an average of 21 days. Eschar removal revealed vital tissue firmly adhered to the recipient bed, rich in fibroblasts and neovascular structures. Subsequent management included either escharectomy with split-thickness autografting over the neodermis, or spontaneous eschar lysis and skin regeneration, with the graft functioning as a dermal regenerator. This model increases tissue availability while providing allografts with both coverage and dermal regenerative properties.
Chronic leg ulcers present a significant clinical challenge due to their prolonged healing time and high recurrence rates. This prospective, multi-centre, non-randomised, observational study investigated the efficacy of a dermal regeneration template in improving skin graft integration for chronic leg ulcer treatment. Thirty patients were enrolled, with a control group receiving only skin grafts to evaluate the additional benefits of the template. Patients were assessed for pain levels, healing rates, wound retraction, pruritus, dressing type, analgesic use, complications, surgeon-evaluated wound recovery using the Vancouver scale, quality of life through the EuroQol questionnaire and photographic wound documentation. At 18 months, 70.0% of patients achieved at least a 50% reduction in wound surface area and 56.7% experienced complete wound closure. Significant improvements were observed in pain and discomfort (p = 0.0125), mobility (p = 0.0267), pain levels (p = 0.0340), vascularity (p = 0.0275) and overall wound reduction (p = 0.0368). The control group demonstrated lower wound reduction and complete healing rates, reinforcing the superior effectiveness of the dermal regeneration template in combination with skin grafting. This study highlights the potential of this approach to accelerate wound healing, reduce patient discomfort and enhance quality of life compared to traditional skin grafting alone.
Carbapenem-resistant Pseudomonas aeruginosa exacerbates the healing of chronic leg ulcer among patients. Further, production and dissemination of the carbapenemase genes are associated with P. aeruginosa high-risk sequence types. Hence, understanding the population structure of these organisms is essential for healthcare personnel to establish effective leg ulcers care management, prevention interventions and control strategies particularly in regions with poor diagnosis. A cross-sectional study included inpatients and outpatients with chronic leg ulcers was conducted from August 2022 to April 2023 in 2 hospitals in Kilimanjaro region. Antimicrobial susceptibility testing was done by using the disc diffusion method. Further, whole genome sequencing was performed to study the genotypic characteristics of the isolates. Ten of 92 participants were positive for genus Pseudomonas isolates upon culture during the study period. Ambler class D carbapenemase genes were carried in all 8 isolates, and class B (blaVIM−2$$ {\mathrm{bla}}_{\mathrm{VIM}-2} $$, blaDIM−1$$ {\mathrm{bla}}_{\mathrm{DIM}-1} $$) in 2 isolates. The tree topology showed that all 8 P. aeruginosa isolates that carried any of the Ambler carbapenemase genes were in one clade with the reference strain PAO1. This study sheds light on different carbapenemase gene types (VIM-2, DIM-1, and OXA-types) harboured in the denominated global high-risk and endemic sequence types in 2 tertiary hospitals in northern Tanzania, alarming the possibility of a prolonged healing process and a high risk of treatment failure among patients because of the increased spread of antimicrobial resistance. Further, the findings underscore the need for antimicrobial surveillance to guide healthcare personnel in managing chronic leg ulcers for better patient outcomes and the implementation of antimicrobial stewardship programs.
The primary aim of this study was to evaluate the impact of the polyhexamethylene biguanide (PHMB) care bundle on the occurrence rates of surgical site infections (SSIs) in paediatric and neonatal cardiac surgery, addressing a critical gap in paediatric-specific infection prevention protocols. A retrospective cohort study included patients under 18 years old who underwent cardiac surgery at IRCCS Policlinico San Donato. Cohort A (n = 117) received the PHMB care bundle from April to December 2023, while Cohort B (n = 801) received conventional care from September 2020 to March 2023. The 1:1 propensity score matching was used to balance covariates between cohorts, resulting in two comparable cohorts (Cohort A = 114 patients and Cohort B = 112). The study found a significant reduction in SSIs among patients receiving the PHMB care bundle compared with those receiving conventional care (1.8% vs. 7.1%, p = 0.048). The comprehensive nature of the PHMB care bundle, including educational programs, preoperative and postoperative antimicrobial treatments, and consistent application of best practices, was instrumental in achieving these outcomes. Implementing antimicrobial care bundles could significantly reduce SSIs in paediatric cardiac surgery. Future research is needed to refine the tested bundle with prospective approaches.
High specification mattresses periodically redistribute pressure using alternating air cells, offloading tissues. This study aimed to evaluate the effects of alternating air pressure gradients on sacral tissue physiology. This randomised cross-over study recruited 15 healthy participants to test the three mattress settings (fast cycle, normal cycle, and slow cycle). Participants were asked to adopt supine, lateral, and high sitting (head of bed at 40°) postures, whilst transcutaneous tissue gas tensions and interface pressures at the sacrum were continuously monitored. Comparison between mattress settings and postures showed no statistical difference (p > 0.05) between peak pressure index values at the sacrum for each air inflation cycle speed setting. By contrast, a significantly higher sacral (p < 0.05) contact area was observed for high sitting. During high sitting, ischemic responses during both fast and normal air inflation cycle speed settings were recorded. During the slow air inflation cycle speed, most participants (60%–100%) showed high levels of perfusion. The present study identified a main effect of posture on interface pressure and perfusion over the sacrum. The alternating mattress speed influenced local tissue perfusion, with the greatest changes in tissue oxygenation occurring in a high-speed setting.
Diabetes related foot ulcers (DFUs) are complex and costly to manage, with the prevalence of non-healing wounds steadily increasing across the globe. Non-healing wounds can occur when clinicians fail to undertake an appropriate assessment, fail to recognise the importance of systemic or local complications, or provide the optimal treatment. The aetiological causes behind non-healing wounds are multifactorial; however, the purpose of this article is to focus on the role of oxygen in non-healing wounds and to introduce readers to advances in the delivery of topical oxygen therapy (TOT) via a haemoglobin spray. Importantly, this article incorporates a clinical decision support tool (CDST) to help clinicians identify the most appropriate individuals for whom topical haemoglobin may be most beneficial and the most appropriate time for introducing the intervention to improve wound healing outcomes.
To develop a concise Consensus Statement on the management of venous leg ulcers (VLUs) that incorporates existing standards and guidance on new technology, including improvement of calf muscle pump function and the utilisation of advanced wound therapies. A multidisciplinary panel of 19 wound healthcare providers from across Canada, who treat patients with VLUs, was formed. A draft document was created and four rounds of consultation and feedback were sought from the panel. The Consensus Statement was completed in June 2024 with 100% consensus on 20 sections and > 85% consensus on the remaining three sections. The key elements are—Clinical assessment and investigations; Treatment-compression to improve calf muscle pump function, and wound treatment with the principles of Wound Bed Preparation; When not healing or only suboptimal compression can be used - add treatment with muscle pump activator by continuous Neuromuscular Electrical Stimulation of the common peroneal nerve to improve calf muscle pump function; When VLUs are not healing with optimal therapy - an algorithm for the use of advanced wound therapies; and Prevention of VLU recurrence. The Consensus Statement is a concise guide for healthcare providers to use at the bedside and has been endorsed by leading nursing and homecare associations in Canada that also have physician representation.
The lack of systematic and comprehensive clinical nutrition management practices for patients with chronic wounds necessitates the construction of a scientifically-based, standardised, normalised nutrition management guidance procedure for these patients in clinical settings. The purpose of this study was to: (i) summarise the best evidence for nutrition management in patients with chronic wounds by performing a systematic literature search and rigorous evaluation, and (ii) construct a nutrition management guidance flowchart for these patients based on best evidence. We reported the best evidence summary for nutrition management in patients with chronic wounds by following the Evidence Summary Reporting Standard of Fudan University Evidence-Based Care Center. An expert panel was established to construct a flowchart of nutrition management guidance for patients with chronic wounds by discussing existing evidence entries. After the quality evaluation, 17 studies (5 guidelines and 12 systematic reviews) were included, which provided extractable data for this summary of evidence. The best evidence of nutrition management in patients with chronic wounds was summarised, and a nutrition management guidance flowchart based on this was constructed, which can provide references for medical staff to guide nutrition management for patients with chronic wounds. Looking ahead, more high-quality research is needed to focus on specific personalised nutrition management programmes for patients with chronic wounds.
Mass spectrometry is increasingly utilised in medicine to identify and quantify small biomarkers for diagnostic and prognostic purposes. Conventional mass spectrometry, however, requires time-consuming sample preparation, hindering its clinical application. Direct sampling mass spectrometry, which allows for direct analysis of patient samples with minimal preparation, offers potential for clinical use. This systematic review examines the utility of direct sampling mass spectrometry for the assessment of external wounds and explores its translational applications in wound care. Out of 2 930 screened abstracts, six studies were included employing various direct sampling mass spectrometry technologies. These studies focused on burn wounds (n = 3), pressure ulcers (n = 2), and acute surgical wounds (n = 1). Both targeted and untargeted molecular profiling methods were used to examine biomarkers related to inflammatory and healing processes, including various proteins, lipid species, and other metabolites. Direct sampling mass spectrometry was found to complement conventional methods such as histology, providing additional insights into the spatial localisation and accumulation of metabolites within wounds. Additionally, imaging techniques equipped with this technology can spatially map wound surfaces and reveal dynamic changes in wounds as they age or progress through different healing processes, with specific metabolite and protein accumulations potentially aiding in prognostication.
This descriptive, cross-sectional study aimed to identify whether having a chronic leg ulcer (CLU), in addition to diabetes, contributed to frailty in individuals ≥65 years old. It also explored the associations between frailty, pre-frailty and other factors. 125 participants aged ≥65 attending outpatient clinics in Ireland were categorised into three groups: (1) diabetes-only and no CLU, (2) CLU-only and no diabetes, and (3) diabetes and CLU. Frailty status was identified using the Groningen Frailty Indicator (GFI) and the Physical Frailty Phenotype (PFP). The mean age was 76.09 ± 7.31. Overall, 90 (72%) had diabetes, and 89 (71.2%) had CLU in the past 6 months. While 124 (99.2%) were frail according to the GFI, 122 (97.6%) were either physically frail (n = 40, 32%) or pre-frail (n = 82, 65.6%) based on the PFP. There was no difference between the three groups regarding general frailty status (p > 0.05). However, being aged ≥75, having CLU and having CLU in addition to diabetes were associated with frailty severity (p < 0.05). Slow gait, inability to go to the toilet and dress/undress independently were the common factors contributing to frailty. Age, comorbidities and CLU were associated with frailty severity. Incorporating multidimensional frailty screening into regular clinic visits for older adults with CLU is recommended.
Good foot care knowledge and behaviour are very important to prevent the occurrence of diabetic foot, but there are few reports on the foot care knowledge and behaviour of older people with diabetes in the community. The purpose of this study was to understand the foot care knowledge and behaviour of older people with type 2 diabetes in Beijing community, and analyse its influencing factors, so as to provide reference for further intervention. We investigated 254 older people with type 2 diabetes in Xinjiekou community, Beijing, including their general information, chronic complications, foot care knowledge and behaviour. The results showed that the average scores of foot care knowledge and behaviour were 73.38 ± 12.25 and 49.70 ± 8.70, respectively. Multiple stepwise regression analysis showed that the factors affecting the total score of foot nursing knowledge of older people with diabetes in community were gender, duration of diabetes and whether they had received foot nursing education (p < 0.05). The factors influencing the total score of foot nursing behaviour were gender, duration of disease, whether they had received foot nursing education and peripheral vascular disease (p < 0.05). In conclusion, the knowledge of foot care of older people with diabetes in community is in the middle level, and the foot care behaviour is not optimistic. Community healthcare workers can improve patients' knowledge of foot care and improve their compliance with foot care behaviour through foot care health education. At the same time, we should pay more attention to men, those with a shorter duration of diabetes and diabetic patients with peripheral vascular disease to reduce the occurrence of diabetic foot.
Guidance for venous leg ulceration (VLU) recommends compression therapy and early referral for specialist vascular assessment within two weeks. Few patients receive timely assessment and referral. Reasons for this are unclear. The aim of this work was to explore nurses' perceptions of the barriers and facilitators to early assessment of VLU and referral for specialist treatment. One-to-one semi-structured interviews explored experiences caring for and referring patients with VLU to a vascular specialist. Maximum variation sampling and inductive thematic analysis were used. Eighteen nurses participated. Findings suggest junior nurses lack knowledge and confidence to care for VLU and often revert to a ‘task-based’ approach, exacerbated by staff shortages and limited training. Because VLU occurs in the context of competing conditions and pressures, comprehensive assessments are missed, and the need for referral is not established or prioritised. Supporting patients to self-manage is seen as a possible solution. Nurses reported disjointed pathways between primary and secondary care, compounded by poor MDT collaboration, ineffective communication systems and inadequate data sharing. Consequently, when the need for referral is established, communicating this between healthcare organisations is complex. Organisational and behavioural barriers impact nurses' ability to promote timely referral. Further exploration with patients and other healthcare professionals is needed.
Friction blisters are common among outdoor enthusiasts, yet their causes remain uncertain. This study aimed to compare foot hydration in long-distance hikers with and without blisters, and to assess variability based on age and sex. An observational case–control study involving 86 hikers was conducted. Skin hydration was measured using a corneometer on various foot zones. Data on blister count, footwear, sex, age, and temperature were recorded. The most hydrated zones were the digital area, forefoot, and heel. Higher hydration was found in the blister group (61.6%) compared to the control group (38.4%). A significant relationship between hydration and blisters was observed in the left foot (p = 0.032). Total foot hydration was higher in women (p = 0.007) and inversely related to age (r = −0.333; p = 0.002). Hydration values above 30.40 a.u. in the right foot and 27.37 a.u. in the left foot were linked to blisters with 80% sensitivity. This study highlights the variability in foot hydration and its relationship with blisters. The influence of age and wet socks underscores the complexity of blister formation, emphasizing the need for future research on effective prevention.
One of the key measures to prevent pressure ulcer is to identify the factors that influence them. This study aimed to assess the occurrence of pressure ulcers and their related risk factors in patients admitted to specialized care units. This research is a retrospective cohort study that was conducted in the critical care units of hospitals affiliated to Ardabil University of Medical Sciences. A total of 1158 patient records who were hospitalized in the intensive care unit (ICU) between 2021 and 2022 were selected from the research population using the available sampling method and based on the inclusion criteria. Data was collected using a researcher-made checklist between April 2021 and December 2022. Data were analysed using analytical tests (chi-squared test, regression test) and descriptive statistics (prevalence, mean, standard deviation, and median) tests. All 1158 patient files were examined without any sample loss. The average age of the patients was 58.59 ± 19.73 years. The study found a significant association between the occurrence of pressure ulcers and age, duration of hospitalization, weight, body temperature, and male gender (p-value <0.001). Additionally, there was a significant association between the occurrence of pressure ulcers and the use of pain relievers, vasopressors, alpha-blockers, calcium blockers, and angiotensin (p-value 0.001). The study also investigated the association between nursing care practices and the development of pressure ulcers. The findings revealed that changing the angle of the bed, using a wavy mattress, repositioning the patient every 2 h, using a CPR bed for mobility, providing protective equipment, and applying physical restraint to the patient were all significantly associated with the likelihood of pressure ulcers (p < 0.001). The study showed that pressure ulcers in ICU patients are influenced by the type of disease and clinical factors in individuals. However, considering the conflicting results of this study with some other studies, more research is needed on this subject. It is suggested that appropriate measures be taken based on the patient's condition to prevent pressure ulcers in those admitted to the ICU.
To investigate risk factors for re-infection and compare the outcomes in people with diabetic foot infections. A retrospective chart review was conducted, and 294 hospitalised patients with moderate to severe diabetic foot infections (DFIs) were analysed for this study. The diagnosis and classification of the severity of infection was based on the International Working Group on the Diabetic Foot (IWGDF) infection guidelines. Skin and soft tissue infections were diagnosed based on clinical observations as per IWGDF classification in addition to ruling out any suspected osteomyelitis (OM) through negative bone culture, MRI or WBC SPECT CT. OM was confirmed by bone culture or histopathology. Clinical outcomes were based on a 12-month follow-up period. All dichotomous outcomes were compared using χ 2 with an alpha of 0.05. The result of this study shows a 48% rate of re-infection in people admitted to our hospital with moderate and severe diabetic foot infections (DFI). Patients with osteomyelitis present during the index admission were 2.1 times more likely to experience a re-infection than patients with soft tissue infection (56.7% vs. 38.0% respectively). In the univariate analysis, risk factors for re-infection included osteomyelitis, non-healing wounds, prolonged wound healing, antidepressants and leukocytosis. In the regression analysis, the only risk factor for re-infection was wounds that were not healed >90 days (HR =2.0, CI: 1.5, 2.7, p = 0.001). Re-infection is very common in patients with moderate and severe diabetic foot infections. Risk factors include osteomyelitis, non-healing wound, prolonged wound healing, antidepressants and leukocytosis.
The disturbance of the inflammatory microenvironment is a frequent pathological trait of diabetic wounds, contributing to the emergence of numerous chronic illnesses. This is crucial in both the development and recovery of wounds caused by diabetes. This study aims to perform a bibliometric analysis of research on the inflammatory microenvironment within the domain of diabetic wounds (DW) over the past 10 years. The objective is to map out the current global research landscape, pinpoint the most significant areas of study and offer guidance for future research avenues. Our research involved querying the Web of Science Core Collection (WoSCC) database for all pertinent studies on the inflammatory microenvironment in diabetic wounds (DW). We utilized bibliometric tools such as CiteSpace, VOSviewer and R (version 4.3.1) to identify and highlight the most impactful studies in the field. The study encompassed a review of 1454 articles published from 2014 to 2023, highlighting China and the United States as pivotal nations in the research of the inflammatory microenvironment in diabetic wounds (DW). Within this sphere, the University of Michigan and Harvard University in the United States, along with Shanghai Jiaotong University in China, emerged as the most prolific institutions. WANG Y from China was identified as the most productive author, while KUNKEL SL from the United States received the most citations. The research primarily focuses on topics such as wound healing, repair processes, angiogenesis, oxidative stress and macrophage activity. Additionally, “macrophage” and “delivery” were pinpointed as the leading subjects with promising research potential in this area. Research on the inflammatory microenvironment of diabetic wounds is rapidly advancing through active international collaboration. The study of new mechanisms related to the inflammatory microenvironment and the development of novel materials for repair based on this microenvironment represent emerging fields of future research, particularly in terms of translational applications. This may offer guidance and novel perspectives for further research in the area of the diabetic wound inflammatory microenvironment.
This study was conducted to adapt the Skin Tear Knowledge Assessment Instrument (OASES) into Turkish and to verify its validity and reliability. This study was conducted on 314 nurses in Türkiye between November 2023 and February 2024 to test the psychometric properties of OASES. The instrument consists of 20 items clustered into six domains. The cultural adaptation process was carried out according to the International Testing Commission guidelines: Turkish translation, expert panel, content validity, translation back to English, preliminary study and the final version of the instrument. To check the validity of the multiple-choice test, item difficulty and discriminating index were analysed. The reliability of the instrument was evaluated to the retest 14 days after the first test. Scale level content validity by 11 experts in wound care was 0,97 (I-CVI = 0.8–1.0). In the item analysed of the OASES, the item difficulty index was 0,51 (p-value = 0.34–0.76) and the discriminating index was 0.40 (D-value = 0.26–0.51). The 2-week test-retest intraclass correlation coefficient of the overall instrument was 0.90 (95% CI = 0.79–0.95). The Turkish version of OASES is a valid and reliable measurement instrument to evaluate nurses' knowledge levels regarding skin tears with acceptable psychometric properties. It can be applied in nursing education, research and practice to evaluate the knowledge of Turkish speaking nurses about skin tears.