The impact of wound pH on the antibacterial properties of Medical Grade Honey when applied to bacterial isolates present in common foot and ankle wounds. An in vitro study.

BACKGROUND: Diabetic foot ulcers (DFUs) and post-surgical wound infections are amongst the most troublesome complications of diabetes and following foot and ankle surgery (FAS) respectively. Both have significant psychosocial and financial burden for both patients and the healthcare system. FAS has been reported to have higher than average post-surgical infections when compared to other orthopaedic subspecialties. Evidence also indicates that patients with diabetes and other co morbidities undergoing FAS are at a much greater risk of developing surgical site infections (SSIs). With the growing challenges of antibiotic resistance and the increasingly high numbers of resilient bacteria to said antibiotics, the need for alternative antimicrobial therapies has become critical. AIM: The aim of this study was to investigate the use of medical grade honey (MGH) when altered to environments typically present in foot and ankle wounds including DFUs and post-surgical wounds (pH6-8). METHODS: MGH (Activon) was altered to pH 6, 7 and 8 and experimental inoculums of Pseudomonas aeruginosa (NCTC10782), Escherichia coli, (NCTC10418), Staphylococcus aureus (NCTC10655) and Staphylococcus epidermidis (NCTC 5955) were transferred into each pH adjusted MGH and TSB solution and the positive and negative controls. RESULTS: MGH adjusted to various pH values had the ability to reduce bacteria cell survival in all pH variations for all bacteria tested, with the most bacterial reduction/elimination noted for Staphylococcus epidermidis. No correlations were noted among the pH environments investigated and the colony counts, for which there were small amounts of bacteria survived. CONCLUSION: This research would indicate that the antibacterial properties of honey remains the same regardless of the pH environment. MGH could therefore potentially be considered for use on non-infected foot and ankle wounds to reduce the bacterial bioburden, the risk of infections and ultimately to improve healing outcomes.

Overcoming barriers to self-management: The person-centred diabetes foot behavioural agreement.

OBJECTIVE: Behavioural agreements have been proposed as a clinical strategy for improving concordance with diabetes foot self-management practices, both for individuals 'At-risk' of, and with active, diabetes foot disease. This narrative review sought to explore the potential supportive role of person-centred diabetes foot behavioural agreements in promoting protective foot self-management behaviours among 'At-risk' individuals. CONCLUSIONS: Healthcare professionals (HCPs) involved in diabetes foot risk stratification and management dedicate considerable time, effort and resources to the prevention of diabetic foot ulcers (DFU) and lower extremity amputation (LEA) and are uniquely placed to deliver person-centred diabetes self-management education and support (DSMES) interventions. Written, verbal and non-verbal agreements are consistent with a wider global move toward DSMES approaches, respectful of people's preferences, and supporting them to undertake protective self-care behaviours. PRACTICE IMPLICATIONS: It is theorised that clear communication of the roles of the person with diabetes, their family or carers and HCPs may improve concordance with self-management behaviours. Rather than a punitive measure or means of facilitating discharge of 'non-concordant' individuals, person-centred behavioural agreements should be framed positively, as a means of delineating, prescribing and supporting individual diabetes foot-care responsibilities. This is an area worthy of further research.

Charcot neuroarthropathy patient education among podiatrists in Scotland: a modified Delphi approach.

BACKGROUND: This evaluation sought to determine current Charcot neuroarthropathy (CN) diabetes patient education practices among Scottish National Health Service (NHS) and academic podiatrists and evaluate novel visual tools and develop expert consensus for future practice. METHODS: Questionnaires collected mixed qualitative and quantitative responses, analysed concurrently within a convergence coding matrix. Delphi methodology permitted member-checking and agreement of consensus over two rounds. RESULTS: Fourteen participants (16.28%) completed a Round One questionnaire, leading to the generation of four themes; Experience; Person-Centred Care and the Content and Context of CN patient education. Seven consensus statements were subsequently developed and six achieved over 80% agreement among 16 participants (18.60%) with a Round Two questionnaire. Respondents agreed CN patient education should be considered for all 'At-risk' individuals with diabetic peripheral neuropathy (DPN). Verbal metaphors, including the 'rocker-bottom' foot, soft or brittle bones, collapsing, walking on honeycomb and a shattering lightbulb were frequently employed. Visual tools, including visual metaphors and The Charcot Foot Thermometer, were positively evaluated and made available online. CONCLUSIONS: Key findings included respondent's belief that CN education should be considered for all individuals with DPN and the frequent use of simile, analogy and metaphor in CN education. The concept of 'remission' proved controversial due to its potential for misinterpretation.

Effects of pH on the Antibiotic Resistance of Bacteria Recovered from Diabetic Foot Ulcer Fluid An In Vitro Study.

BACKGROUND: This study investigated the resistance of bacteria isolated from diabetic foot ulcers (DFUs) to antibiotics frequently used in the management of the diabetic foot infections, at a range of pH values (pH 6.5, 7.5, and 8.5) known to exist in DFU wound fluid. This study aimed to determine whether changes (or atypical stasis) in wound fluid pH modulate the antibiotic resistance of DFU isolates, with potential implications in relation to the suppression/eradication of bacterial infections in DFUs. METHODS: Thirty bacterial isolates were recovered from DFU wound fluid, including Staphylococcus spp, Staphylococcus aureus, Escherichia coli, Streptococcus spp, Pseudomonas spp, and Pseudomonas aeruginosa. The resistances of these isolates to a panel of antibiotics currently used in the treatment of infected or potentially infected DFUs, ie, ciprofloxacin, amoxicillin-clavulanate, doxycycline, and piperacillin-tazobactam, at the previously mentioned pH values were determined by a modification of the Kirby-Bauer assay. RESULTS: The resistance of DFU isolates to clinically relevant antibiotics was significantly affected by the pH levels in DFU wound fluid. CONCLUSIONS: These findings highlight the importance of a more comprehensive understanding of the conditions in DFUs to inform clinical decision making in the selection and application of antibiotics in treating these difficult-to-heal wounds. The scale of the differences in the efficacies of antibiotics at the different pH values examined is likely to be sufficient to suggest reconsideration of the antibiotics of choice in the treatment of DFU infection.

The pH of wound fluid in diabetic foot ulcers -- the way forward in detecting clinical infection?

Infections within diabetic foot ulcers are often hard to detect and extremely difficult to treat. The normal signs and symptoms of infection including purulence, erythema, pain, tenderness, warmth and induration are frequently absent in such wounds necessitating exploration of other ways of rapidly and accurately detecting infection. This study considers diabetic wound fluid pH as a possible alternative means of monitoring infection status. CINAHL, Ovid SP and MEDLINE were searched for papers in English published between January 2004 to May 2014. Key search terms included wound fluid, exudate, wound, ulcer, diabetes, pH, healing, infection, bacteria. This paper considers the potential benefits of augmenting and supporting current clinical practice in the early determination of wound healing trajectory and infection status, by monitoring wound fluid pH. The evidence collected highlights the need for further research and suggests the potential of wound fluid analysis as a possible surrogate marker for detecting infection in diabetic foot ulcers.