REPAIRS Delphi: A UK and Ireland Consensus Statement on the Management of Infected Arterial Pseudoaneurysms Secondary to Groin Injecting Drug Use

\ua9 2024 The Author(s)Objective: Consensus guidelines on the optimal management of infected arterial pseudoaneurysms secondary to groin injecting drug use are lacking. This pathology is a problem in the UK and globally, yet operative management options remain contentious. This study was designed to establish consensus to promote better management of these patients, drawing on the expert experience of those in a location with a high prevalence of illicit drug use. Methods: A three round modified Delphi was undertaken, systematically surveying consultant vascular surgeons in the UK and Ireland using an online platform. Seventy five vascular surgery units were invited to participate, with one consultant providing the unit consensus practice. Round one responses were thematically analysed to generate statements for round two. These statements were evaluated by participants using a five point Likert scale. Consensus was achieved at a threshold of 70% or more agreement or disagreement. Those statements not reaching consensus were assessed and modified for round three. The results of the Delphi process constituted the consensus statement. Results: Round one received 64 (86%) responses, round two 59 (79%) responses, and round three 62 (83%) responses; 73 (97%) of 75 units contributed. Round two comprised 150 statements and round three 24 statements. Ninety one statements achieved consensus agreement and 15 consensus disagreement. The Delphi statements covered sequential management of these patients from diagnosis and imaging, antibiotics and microbiology, surgical approach, wound management, follow up, and additional considerations. Pre-operative imaging achieved consensus agreement (97%), with computerised tomography angiography being the modality of choice (97%). Ligation and debridement without arterial reconstruction was the preferred approach at initial surgical intervention (89%). Multidisciplinary management, ensuring holistic care and access to substance use services, also gained consensus agreement. Conclusion: This comprehensive consensus statement provides a strong insight into the standard of care for these patients

Modification and validation of the Bluebelle Wound Healing Questionnaire (WHQ) for assessing surgical site infection in wounds healing by secondary intention

\ua9 2025 The Authors. Background: Surgical wounds healing by secondary intention are common. Healing is often complicated by surgical site infection (SSI). SSI assessment is important to guide treatment but existing methods generally require in-person assessment, making them resource intensive. A validated patient-reported SSI outcome measure may be useful to overcome this limitation. Aim: To modify and validate the Bluebelle Wound Healing Questionnaire (WHQ) for wounds healing by secondary intention. Methods: The 18-item Bluebelle WHQ developed for wounds healing by primary intention was modified to make it applicable to secondary healing wounds. Testing was performed as part of the SWHSI-2 randomised trial assessing negative pressure wound dressings versus standard care. Participants completed the WHQ at five timepoints; in-person (baseline, post-healing) and by post (3, 6, 12 months). A reference SSI assessment was performed by a research nurse at the time of wound healing. Acceptability and criterion validity (ability of the Bluebelle WHQ to discriminate between SSI/no SSI) were explored by examining questionnaire return rates, levels of missing data and total score sensitivity/specificity values (receiver operating characteristic curve (ROC)). Results: Baseline in-person questionnaire return rates were highest (672/686; 98 %), with postal return rates of 428/615 (68.5 %), 274/416 (65.9 %) and 186/296 (62.8 %) at follow up points. Overall, low levels of item-missing data were observed with few problems completing the questionnaire reported. Ability to discriminate between SSI/no SSI was good (Area under ROC = 0.796). Conclusion: The modified Bluebelle WHQ is a valuable tool for post-discharge assessment of wounds healing by secondary intention. It is recommended for use in research and clinical practice

Lawson criterion for ignition exceeded in an inertial fusion experiment

For more than half a century, researchers around the world have been engaged in attempts to achieve fusion ignition as a proof of principle of various fusion concepts. Following the Lawson criterion, an ignited plasma is one where the fusion heating power is high enough to overcome all the physical processes that cool the fusion plasma, creating a positive thermodynamic feedback loop with rapidly increasing temperature. In inertially confined fusion, ignition is a state where the fusion plasma can begin "burn propagation" into surrounding cold fuel, enabling the possibility of high energy gain. While "scientific breakeven" (i.e., unity target gain) has not yet been achieved (here target gain is 0.72, 1.37 MJ of fusion for 1.92 MJ of laser energy), this Letter reports the first controlled fusion experiment, using laser indirect drive, on the National Ignition Facility to produce capsule gain (here 5.8) and reach ignition by nine different formulations of the Lawson criterion

Functional significance of erythropoietin in renal cell carcinoma

One of the molecules regulated by the transcription factor, hypoxia inducible factor (HIF), is the hypoxia-responsive hematopoietic factor, erythropoietin (EPO). This may have relevance to the development of renal cell carcinoma (RCC), where mutations of the von Hippel-Lindau (VHL) gene are major risk factors for the development of familial and sporadic RCC. VHL mutations up-regulate and stabilize HIF, which in turn activates many downstream molecules, including EPO, that are known to promote angiogenesis, drug resistance, proliferation and progression of solid tumours. HIFs typically respond to hypoxic cellular environment. While the hypoxic microenvironment plays a critical role in the development and progression of tumours in general, it is of special significance in the case of RCC because of the link between VHL, HIF and EPO. EPO and its receptor, EPOR, are expressed in many cancers, including RCC. This limits the use of recombinant human EPO (rhEPO) to treat anaemia in cancer patients, because the rhEPO may be stimulatory to the cancer. EPO may also stimulate epithelial-mesenchymal transition (EMT) in RCC, and pathological EMT has a key role in cancer progression. In this mini review, we summarize the current knowledge of the role of EPO in RCC. The available data, either for or against the use of EPO in RCC patients, are equivocal and insufficient to draw a definitive conclusion

Modification and validation of the Bluebelle Wound Healing Questionnaire (WHQ) for assessing surgical site infection in wounds healing by secondary intention

BackgroundSurgical wounds healing by secondary intention are common. Healing is often complicated by surgical site infection (SSI). SSI assessment is important to guide treatment but existing methods generally require in-person assessment, making them resource intensive. A validated patient-reported SSI outcome measure may be useful to overcome this limitation. AimTo modify and validate the Bluebelle Wound Healing Questionnaire (WHQ) for wounds healing by secondary intention.MethodsThe 18-item Bluebelle WHQ developed for wounds healing by primary intention was modified to make it applicable to secondary healing wounds. Testing was performed as part of the SWHSI-2 randomised trial assessing negative pressure wound dressings versus standard care. Participants completed the WHQ at five timepoints; in-person (baseline, post-healing) and by post (3, 6, 12 months). A reference SSI assessment was performed by a research nurse at the time of wound healing. Acceptability and criterion validity (ability of the Bluebelle WHQ to discriminate between SSI/no SSI) were explored by examining questionnaire return rates, levels of missing data and total score sensitivity/specificity values (receiver operating characteristic curve (ROC)).Results Baseline in-person questionnaire return rates were highest (672/686; 98%), with postal return rates of 428/615 (68.5%), 274/416 (65.9%) and 186/296 (62.8%) at follow up points. Overall, low levels of item-missing data were observed with few problems completing the questionnaire reported. Ability to discriminate between SSI/no SSI was good (Area under ROC=0.796)ConclusionThe modified Bluebelle WHQ is a valuable tool for post-discharge assessment of wounds healing by secondary intention. It is recommended for use in research and clinical practice