The sharp decrease in open surgical repair (OSR) for abdominal aortic aneurysm (AAA) has raised concerns about contemporary postoperative outcomes. The study was designed to analyse the impact of complications on clinical outcomes within 30 days following OSR.Patients who underwent OSR for intact AAA registered prospectively between 2016 and 2019 in the Dutch Surgical Aneurysm Audit were included. Complications and outcomes (death, secondary interventions, prolonged hospitalization) were evaluated. The adjusted relative risk (aRr) and 95 per cent confidence intervals were computed using Poisson regression. Subsequently, the population-attributable fraction (PAF) was calculated. The PAF reflects the expected percentage reduction of an outcome if a complication were to be completely prevented.A total of 1657 patients were analysed. Bowel ischaemia and renal complications had the largest impact on death (aRr 12·44 (95 per cent c.i. 7·95 to 19·84) at PAF 20 (95 per cent c.i. 8·4 to 31·5) per cent and aRr 5·07 (95 per cent c.i. 3·18 to 8.07) at PAF 14 (95 per cent c.i. 0·7 to 27·0) per cent, respectively). Arterial occlusion had the greatest impact on secondary interventions (aRr 11·28 (95 per cent c.i. 8·90 to 14·30) at PAF 21 (95 per cent c.i. 14·7 to 28·1) per cent), and pneumonia (aRr 2·52 (95 per cent c.i. 2·04 to 3·10) at PAF 13 (95 per cent c.i. 8·3 to 17·8) per cent) on prolonged hospitalization. Small effects were observed on outcomes for other complications.The greatest clinical impact following OSR can be made by focusing on measures to reduce the occurrence of bowel ischaemia, arterial occlusion and pneumonia.
Abstract The ultrasonographic measurement of abdominal aortic aneurysm (AAA) must be accurate as the decision on elective repair will usually be based on such results. To detect expansion, measurements must be comparable. The interobserver variation of ultrasonographic measurement of infrarenal aortic aneurysms under standardized conditions is described.
Het leren van klinisch redeneren en oplossen van medische problemen vormt een belangrijk onderdeel van het medisch onderwijs. In dit artikel wordt een overzicht gegeven van de historische ontwikkeling van de inzichten om het proces van klinisch redeneren te verklaren. Tegenwoordig wordt aangenomen dat klinisch redeneren sterk gekoppeld is aan de beschikking over medische (klinische) kennis. Het is hierbij belangrijk dat medici een persoonlijk netwerk van patiëntgeoriënteerde medische kennis ontwikkelen, in de vorm van zogenaamde ziektescripts. Klinisch redeneren met behulp van ziektescripts berust op de activatie van een eerder verkregen netwerk van relevante kennis en ervaring door nieuwe informatie. Enkele voorbeelden in het huidige medisch onderwijs waarbij het klinisch redeneren en de ontwikkeling van ziektescripts centraal staan, worden besproken. (Vries AC de, Custers EJFM, Cate ThJ ten. Leren klinisch redeneren en het ontwikkelen van ziektescripts: mogelijkheden in het medisch onderwijs. Tijdschrift voor Medisch Onderwijs 2006;25(1):3-13.)
In the past years extensive experience has been gained in the upgrading of waste water treatment processes for efficient nutrient removal. Hereby especially the integration of denitrification and biological P-removal has been focused upon on these experiences a new process configuration (the BCFS®-process) was developed. This process is specially designed to optimise the activity of denitrifying P-removing bacteria. If the biological P-removal process needs to be supplemented an integrated ‘P-stripper’ is designed. This paper reviews the upgrading of three wastewater treatment plants by the new process.
The difference between the mortality rate from ruptured abdominal aortic aneurysm (overall mortality rate 85-95 per cent and operative mortality rate 23-63 per cent), and that for elective aneurysm repair (less than 5 per cent) is dramatic. Awareness of the existence of an abdominal aortic aneurysm is therefore essential. Of 1800 consecutive patients aged greater than or equal to 50 years referred for their first abdominal ultrasonography, 113 who had been referred specifically for suspected abdominal aortic aneurysm or vascular screening were excluded. The remaining 1687 patients (693 men and 994 women) form the study group. Apart from the symptom-directed examination, the entire abdomen of every patient was routinely studied by ultrasonography. The definition of an abdominal aortic aneurysm was a local dilatation of the aorta with an anteroposterior diameter greater than 30 mm or greater than 1.5 times the anteroposterior diameter of the proximal aorta. In 82 cases (4.9 per cent) an abdominal aortic aneurysm was disclosed; 61 were in men (8.8 per cent) and 21 were in women (2.1 per cent). The prevalence of abdominal aortic aneurysm as an incidental finding in men aged greater than or equal to 60 years was 11.4 per cent. In every patient aged greater than or equal to 50 years undergoing their first abdominal ultrasonography examination, the aorta should be screened for the presence of an aneurysm.
A carotid endarterectomy (CEA) has certain risks, of which peri-operative cardiovascular risk is one. Peri-operative neurological monitoring can be done with electroencephalography (EEG) and transcranial Doppler (TCD). No previous reports have been published demonstrating the actual changes in cerebral and cardiac activity during a peri-operative asystole.The case of a 70 year old man with a symptomatic (bilateral) carotid stenosis is described. The patient complained of amaurosis fugax in both eyes. Duplex ultrasound showed a stenosis of >70% in both carotid arteries. The most severe symptoms were on the right side, so a staged approach was chosen, starting with a right sided eversion CEA (eCEA). Peri-operatively, the patient experienced an asystolic cardiac arrest after external carotid artery revascularisation, requiring brief cardiopulmonary resuscitation, which was recorded on the EEG. Post-operatively, the patient recovered fully, with no post-operative neurological or cardiac sequelae. The (symptomatic) contralateral stenosis was treated conservatively with best medical therapy (BMT; dual antiplatelets and statin). The patient is currently in good clinical condition, 1.5 years later.This case shows the unique EEG recording of a cardiological event during eCEA. The cause of asystole was most likely a vasovagal syncope as a result of the surgical procedure by iatrogenic damage to the carotid sinus fibres, causing impairment of the baroreflex and chemoreflex mechanisms, which is greater during eCEA. The unilateral eCEA and contralateral BMT in this symptomatic (bilateral) stenosis seemed appropriate when cardiological risk was increased but follow up ruled out any cardiological cause.
