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Hydatid disease (cystic echinococcosis) is a neglected zoonosis, often incidentally detected in its late stages. The clinical manifestations depend on the location and dimensions of the cysts, with the liver and lungs frequently affected. This case report describes thrombocytopenia, an unusual haematological complication of hydatid disease. We use this case to highlight the role that platelets play in various parasitic infections and to advocate for further research into the role of platelets in hydatid disease., Contribution: We draw attention to a less well-known complication of hydatid disease., Competing Interests: The authors declare that they have no financial or personal relationships that may have inappropriately influenced them in writing this case report., (© 2024. The Authors.)

Background/Objectives : Chronic limb-threatening ischaemia (CLTI) is a significant life and limb-threatening condition. Two recent seminal trials, BEST-CLI and BASIL-2, have provided seemingly conflicting results concerning the optimal treatment modality for patients with CLTI. We sought to investigate the outcomes of patient undergoing infrainguinal bypass at two centres in Aotearoa New Zealand. Methods : A cross-sectional retrospective review of all patients who underwent infrainguinal bypass grafting for CLTI at Auckland City Hospital and Waikato Hospital between January 2020 and December 2021 was performed. The primary outcome was a composite of death, above-ankle amputation, and major limb reintervention. The secondary outcome was minor limb reintervention. Kaplan-Meier survival analysis was performed to determine time to the primary and secondary endpoints. Demographic factors were examined using the log-rank test to examine the effect on the outcome. Results: One hundred and nineteen patients who underwent infrainguinal bypass for CLTI in the study period were identified. Of these, 93 patients had a bypass with ipsilateral or contralateral GSV. The median follow-up time was 1.85 years. The most common indication for surgery was tissue loss (69%, n = 63), with the most common distal bypass target being the below-knee popliteal artery (45%, n = 41). The primary composite outcome occurred in 42.8% of the cohort ( n = 39). Death was the most common component of the primary outcome (26%, n = 24). Male sex (HR 0.48, 95% CI 0.26-0.88, p = 0.018) and statin use (HR 0.49, 95% CI 0.24-0.98, p = 0.044) were independent predictors of protection from the composite outcome on multivariate analysis. Dialysis dependence (HR 3.32, 95% CI 1.23-8.99, p = 0.018) was an independent predictor for patients meeting the composite outcome. Conclusions : This study's results are consistent with the published outcomes of BEST-CLI. The patient cohorts examined, anatomical disease patterns, and conduit use may explain some of the differences observed between this study, BEST-CLI and BASIL-2. Further work is required to define the specific patient populations who will benefit most from an open surgical or endovascular first approach to the management of CLTI.

Competing Interests: The authors declare that they have no financial or personal relationships that may have inappropriately influenced them in writing this article.

Background: Classical toxin-mediated respiratory diphtheria has become less common because of widespread effective vaccination globally but invasive disease as a result of non-toxigenic strains of Corynebacterium diphtheriae is not prevented by vaccination and may result in severe disease, including infective endocarditis (IE)., Objectives: To describe the outbreak and subsequent investigation of a cluster of five cases of non-toxigenic C. diphtheriae endocarditis., Method: A retrospective observational case series of five cases of non-toxigenic C. diphtheriae endocarditis identified in the rural West Coast district of the Western Cape province of South Africa between May 2021 and June 2021., Results: Non-toxigenic C. diphtheriae IE had an aggressive clinical course with high mortality in this cohort. Only one of five patients survived to hospital discharge. The surviving patient received a prompt diagnosis with early surgical intervention but still had a complicated clinical course. Notably, only one case had a pre-existing risk factor for IE, namely a prosthetic valve. Whole genome sequencing of clinical isolates confirmed that all isolates were of the same novel sequence type of non-toxigenic C. diphtheriae but despite a thorough investigation no epidemiological link was ever found between the cases., Conclusion: Non-toxigenic strains of C. diphtheriae are less well known but may be highly virulent and cause severe invasive disease., Contribution: This is the largest cluster of non-toxigenic C. diphtheriae IE ever described in South Africa and expands the body of literature on this unusual but possibly emerging infection., Competing Interests: The authors declare that they have no financial or personal relationships that may have inappropriately influenced them in writing this article., (© 2024. The Authors.)

Background: The coronavirus disease 2019 (COVID-19) pandemic placed an unprecedented strain on intensive care units (ICUs) in South Africa. Infection prevention and control (IPC) strategies were highlighted to minimise the risk to healthcare workers and for the protection of patients from contracting hospital-acquired infections (HAIs). During the third wave, our institution adopted a shift system to address severe burnout among ICU personnel. We noted an upstroke in the occurrence of HAIs, specifically carbapenem-resistant Enterobacterales (CRE) and multidrug-resistant (MDR) Acinetobacter baumannii., Objectives: To report these outbreaks, compare the rate of CRE and A. baumannii infections with the first COVID-19 wave and to analyse its impact on patient outcomes., Method: We retrospectively analysed data from a prospectively collected registry involving all adult patients with severe COVID-19 admitted to the dedicated COVID-19 ICU from May 2021 to September 2021. Information from the admission database, including the patients' demographics, comorbidities, laboratory results and length of ICU stay were extracted., Results: Ninety patients were admitted with severe COVID-19 during the third wave. There was an outbreak of both CRE (the majority Klebsiella pneumoniae) and A. baumannii. Furthermore, 18 patients cultured the same CRE organism, and 25 patients cultured the environmental organism A. baumannii. The HAI rate was significantly higher compared with the first wave published data: 59/90 (65.6%) v. 73/363 (20.1%, p<0.01). Patients with any HAI had a longer mean stay in ICU (10.1 days v. 6.7 days (p<0.01) and a higher mortality of 48/59 (81%) v. 19/31 (61%) (p=0.05)., Conclusion: We observed a very significant rise in HAIs in the COVID-19 ICU during the third wave compared with the first, with almost three times as many patients developing HAIs. Unsurprisingly, it was associated with a longer mean stay in ICU and a higher mortality. The outbreak of both CRE and A. baumannii, and the fact that many patients cultured the same CRE organism and A. baumannii, strongly suggests that a critical breakdown in IPC measures had occurred.

Background: Pseudoaneurysms of the abdominal aorta secondary to pancreatitis are an extremely rare clinical entity, however, can result in life threatening complications., Objective: To describe a chimney endovascular aneurysm repair (Ch-EVAR) for an acute pancreatitis related paravisceral aortic pseudoaneurym., Method: Prospective data collected from subject., Results: We present a case of 23-year-old female who underwent a successful salvage Ch-EVAR for a ruptured paravisceral pseudoaneurysm secondary to acute on chronic pancreatitis., Conclusion: Ch-EVAR may present a viable temporizing or definitive therapeutic treatment option for a paravisceral pseudoaneurysm, particularly in the setting of acute pancreatitis. Further studies are warranted to elucidate the long term viability of Ch-EVAR grafts in the suprarenal, paravisceral aortic position., Competing Interests: Declaration of conflicting interestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Purpose: Ascending aortic pseudoaneurysms are a common phenomenon requiring surgical intervention but can pose high surgical risks in medically complex patients. We report a novel approach to percutaneous closure of ascending aortic pseudoaneurysms using an Amplatzer PFO closure device., Case Report: We present the case of a 65-year-old male with haemoptysis on a background of multiple cardiac surgeries and chronic kidney disease. Serial computerised tomography scans of the thoracic aorta demonstrated an enlarging ascending aortic pseudoaneurysm. Percutaneous closure was considered the safest treatment option. With angiography, the pseudoaneurysm was defined and a 25 mm Amplatzer PFO closure device was deployed. Repeat Computed Tomography aortography performed 43 days later confirmed stable device position and resolution of the pseudoaneurysm. The patient was clinically stable at this follow-up point., Conclusion: The off-label use of the Amplatzer PFO device may provide a viable alternative treatment for ascending aortic pseudoaneurysms in medically complex patients to reduce morbidity and mortality., Competing Interests: Declaration of conflicting interestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Purpose: The objective of this study is to report a case of a primary aortoenteric fistula successfully treated with endovascular repair without aortic explant., Case Report: A 48-year-old man presented with a 24-hour history of hematemesis and malena. A computed tomography (CT) abdomen and pelvis demonstrated a 6 cm infrarenal aortic aneurysm with periaortic stranding and contrast enhancement within the lumen of the third part of the duodenum. The patient underwent emergency Endovascular Aortic Repair (EVAR). The patient was discharged on day 8 of his admission on oral antibiotics. He returned 7 weeks postindex procedure and underwent a laparotomy with omental patch repair of the aortic defect. Intraoperative cultures grew candida albicans, and the patient was discharged on lifelong oral Fluconazole and Amoxycillin-Clavulanic Acid. At 18 months postoperatively, the patient was clinically stable with improved appearances on CT aortogram., Conclusion: We discuss the use of EVAR without aortic explant as a possible treatment option in the management of patient with primary aortoenteric fistulae. This may potentially avoid the significant morbidity and mortality associated with aortic explant in suitable candidates without perioperative signs of sepsis.

Background: Infective endocarditis (IE) is a morbid condition with high mortality. We investigated predictors of in-hospital mortality and embolic phenomena in a contemporary Australasian cohort., Methods: We identified all patients with IE admitted between January 2017 and 30th April 2020 (40 months). Patient characteristics, risk factors and clinical outcomes were retrospectively collected and analysed., Results: One hundred and seventy-two consecutive patients (mean age: 56.8 ± 17.9 years, male: 63%, 114/172) were included. Causative organisms were Staphylococcus aureus (44%, 75/172), Enterococcus faecalis (15%, 26/172), Streptococcus mitis (6%, 10/172) and Staphylococcus epidermidis (3%, 6/172). In-hospital mortality was 15% (25/172). Embolic complications were found among 57% (98/172) of patients, the most common being stroke (23%, 40/172), septic pulmonary emboli (17%, 29/172), splenic and/or renal emboli (17%, 26/172) and peripheral limb emboli (15%, 25/172). Sixty (35%, 60/172) patients underwent cardiac surgery. On multivariable analysis, independent predictors of in-hospital mortality were: increased age (odds ratio: 1.064, per year older, P = 0.001), ICU admission independent of cardiac surgery (OR 9.81, P < 0.001), moderate or severe LV impairment (OR 5.19, P = 0.012) and any sign of embolic phenomena to limbs (OR 5.02, P = 0.006). Multivariable predictors of embolic complications were S. aureus bacteraemia (OR 3.22, P = 0.001) and large vegetation >10 mm (OR 3.04, P = 0.002)., Conclusion: We demonstrate predictors of in-hospital mortality and embolic phenomena in our cohort. Though age remains a consistent predictor of mortality, surprisingly, signs of embolic phenomena to the limbs was established as an independent predictor of mortality. The mechanism of this is unclear and warrants further evaluation., (© 2022 Royal Australasian College of Surgeons.)

The COVID-19 pandemic has profoundly influenced the practice of medicine in Australia over the last 24 months. Recently, the development of several vaccines to COVID-19 has been accompanied by reports of an associated rare syndrome of thrombosis and thrombocytopaenia (VITTS). The possibility of this rare disorder confronts all clinicians who deal with acute thrombosis, particularly given the prevalence of patients who have recently been immunised. However, VITTS remains rare, and we believe unnecessary focus on its potential diagnosis may distract from other more common causes of acute thrombosis. We discuss this with reference to a recent case at our institution.

Popliteal Artery Entrapment Syndrome (PAES) is an uncommon syndrome that predominantly affects young athletes. Functional PAES is a subtype of PAES without anatomic entrapment of the popliteal artery. Patients with functional PAES tend to be younger and more active than typical PAES patients. A number of differential diagnoses exist, the most common of which is chronic exertional compartment syndrome. There is no consensus regarding choice of investigation for these patients. However, exercise ankle-brachial indices and magnetic resonance imaging are less invasive alternatives to digital subtraction angiography. Patients with typical symptoms that are severe and repetitive should be considered for intervention. Surgical intervention consists of release of the popliteal artery, either via a posterior or medial approach. The Turnipseed procedure involves a medial approach with a concomitant release of the medial gastrocnemius and soleal fascia, the medial tibial attachments of the soleus and excision of the proximal third of the plantaris muscle. Injection of botulinum A toxin under electromyographic guidance has recently shown promise as a diagnostic and/or therapeutic intervention in small case series. This review provides relevant information for the clinician investigating and managing patients with functional PAES., Competing Interests: The authors state that this study meets the ethical standards of the journal 66. The authors have no conflicts of interest to declare., (Thieme. All rights reserved.)

Ligation of the left renal vein is an accepted manoeuvre where it is difficult to access the pararenal abdominal aorta for the open treatment of aortic occlusive or aneurysmal disease. There is some controversy regarding the long-term effect of this on renal function. We describe the case of a 37-year-old gentleman who underwent an elective aorto-bifemoral bypass for aorto-iliac occlusive disease with symptoms of short distance claudication, with intra-operative ligation of the left renal vein. This was complicated by post-operative acute renal failure and haematuria, with CT findings of left renal venous dilatation and peri-renal stranding. The patient underwent successful left renocaval bypass with reversed great saphenous vein, with subsequent resolution of haematuria and improvement in renal function. The syndrome of acute renal failure and haematuria is a rare but possible complication of left renal vein ligation during aortic surgery, and restoration of renal venous outflow via renocaval bypass in this instance was an effective method of treating this complication.

Purpose: Ensuring that examiners in different parallel circuits of objective structured clinical examinations (OSCEs) judge to the same standard is critical to the chain of validity. Recent work suggests examiner-cohort (i.e., the particular group of examiners) could significantly alter outcomes for some candidates. Despite this, examiner-cohort effects are rarely examined since fully nested data (i.e., no crossover between the students judged by different examiner groups) limit comparisons. In this study, the authors aim to replicate and further develop a novel method called Video-based Examiner Score Comparison and Adjustment (VESCA), so it can be used to enhance quality assurance of distributed or national OSCEs., Method: In 2019, 6 volunteer students were filmed on 12 stations in a summative OSCE. In addition to examining live student performances, examiners from 8 separate examiner-cohorts scored the pool of video performances. Examiners scored videos specific to their station. Video scores linked otherwise fully nested data, enabling comparisons by Many Facet Rasch Modeling. Authors compared and adjusted for examiner-cohort effects. They also compared examiners' scores when videos were embedded (interspersed between live students during the OSCE) or judged later via the Internet., Results: Having accounted for differences in students' ability, different examiner-cohort scores for the same ability of student ranged from 18.57 of 27 (68.8%) to 20.49 (75.9%), Cohen's d = 1.3. Score adjustment changed the pass/fail classification for up to 16% of students depending on the modeled cut score. Internet and embedded video scoring showed no difference in mean scores or variability. Examiners' accuracy did not deteriorate over the 3-week Internet scoring period., Conclusions: Examiner-cohorts produced a replicable, significant influence on OSCE scores that was unaccounted for by typical assessment psychometrics. VESCA offers a promising means to enhance validity and fairness in distributed OSCEs or national exams. Internet-based scoring may enhance VESCA's feasibility., (Copyright © 2021 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the Association of American Medical Colleges.)

Background: We use a 'Virtual Clinic' for follow up of hip and knee replacement patients. The aim of this study was to investigate patient compliance, pain and function, revision rates and surgeon experience using this system., Methods: All hip and knee replacements conducted from 2000 onwards were suitable for 'Virtual Clinic' review. Between July 2014 and December 2016, all patients due for follow up (at 1, 5 and 7 years post-operatively, or biennially thereafter) were mailed an Oxford Hip or Knee Score and a request for a radiograph. A surgeon reviewed the questionnaire and radiograph and decided whether face-to-face review was necessary. We calculated compliance as the percentage of eligible patients who completed the 'Virtual Clinic'. We used retrospective review of medical records for all clinic participants to analyse Oxford scores, disposition following appointment, and revision rates. We reviewed all clinic participants in December 2017 to identify any further revisions. Surgeon feedback was assessed by emailed survey., Results: A total of 2076 patients were due for follow up. 1405 patients were contactable, and 710 completed the process. We calculated a 36% compliance rate. Surgeons decided 162 (23%) patients with a mean Oxford score of 24.2 required face-to-face assessment. This identified 13 patients needing revision. One other patient was revised for loosening which developed between 'Virtual Clinic' appointments. Surgeon feedback indicated the inclusion of a 'comment' section on the questionnaire as particularly useful., Discussion: We describe our adoption of a 'Virtual Clinic' for joint replacement follow up. We recommend this system as a practical method of following up patients., (© 2018 Royal Australasian College of Surgeons.)