Ultrasound最新文献

Introduction: Mirror artefacts often can be seen in abdominal ultrasound. Their efficacy in detecting sonographically occult lesions has been overlooked.

Case report: We present two cases of abdominal ultrasound examination, where the mirror image artefact was utilised in the diagnosis of sonographically occult lesions in segment VII of the liver.

Discussion: The physical principle behind the mirror image artefacts in these cases has been explored and explained. Suggestion on utilising this artefact is recommended.

Conclusion: These cases demonstrate the key role that mirror artefacts played in detecting occult liver lesions. Sonographers are advised to extend their survey of the right liver and pay close attention to displayed mirror images above the diaphragm especially from potential sonographically occult lesions in segment VII of the liver.

Introduction: To perform a systematic review of the diagnostic accuracy of point-of-care lung ultrasound, compared to chest radiography, in children and young people (0-21 years) who present to ambulatory settings with suspected community-acquired pneumonia.

Methods: Registration: Prospero June 2021 CRD42021260552. Electronic searching performed on Medline, Embase, CINAHL and Science Citation Index from inception to 20 June 2023. Two researchers independently screened titles, abstracts, and full texts for study selection. Risk of bias was assessed using the Quality Assessment Tool for Diagnostic Accuracy Studies (QUADAS-2) tool. Meta-analysis of included studies.

Results: The six studies included in this systematic review described point-of-care lung ultrasound performed primarily by paediatric emergency medicine clinicians on a total of 1099 paediatric patients, with a reference standard of chest radiography or chest radiography with clinical findings. The majority of included studies lacked clarity on training for the index test with potential bias around flow and timing of testing. Meta-analysis of the combined results of the included six studies calculated a pooled sensitivity of 90.9% (95% CI [85.5%, 94.4%]) and pooled specificity of 80.7% (95% CI [63.6%, 91.0%]).

Conclusions: Point-of-care lung ultrasound has high sensitivity but lower specificity to diagnose acute pneumonia in children. Further research is needed which overcomes issues around training in point-of-care lung ultrasound, study design and reliability of the reference test (chest radiography) to better evidence the role of point-of-care lung ultrasound in diagnosing pneumonia in children in ambulatory and resource-limited settings.

Background: From previous studies, evaluation of post-anastomosis draining-vein volume flow rate with Doppler ultrasound can be a predictor for arteriovenous fistula maturation. Due to the high variation in measurements by the effect of probe pressure in draining vein, measuring volume flow rate based on post-anastomosis feeding-artery may be an early alternative predictor of arteriovenous fistula maturation. This study aims to investigate the correlation of post-creation brachial artery volume flow rate on maturity of brachiocephalic arteriovenous fistula access in patients with end-stage kidney disease with diabetes mellitus.

Methods: A retrospective cohort study was conducted on end-stage kidney disease patients with diabetes mellitus who underwent brachiocephalic arteriovenous fistula creation at three hospitals from July 2019 to March 2020. Doppler ultrasound examination of the brachial artery and draining vein volume flow rate was conducted at pre-operative, post-creation, 2 weeks, and 6 weeks post-creation. Maturity was evaluated at 6 weeks post-anastomosis.

Results: A total of 71 subjects met the inclusion and exclusion criteria, with 44 (62%) achieving maturation within 6 weeks. There was a correlation between post-anastomosis brachial artery (p < 0.001) and draining vein volume flow rate (p < 0.001) with arteriovenous fistula maturity after 6 weeks post-operatively. Brachial artery volume flow rate of ⩾350 mL/min can predict AVF maturity with a sensitivity of 95.45% (95% confidence interval = 84.86-98.74) and a specificity of 85.19% (95% confidence interval = 67.52-94.08).

Conclusion: Post-anastomosis brachial artery flow volume can be a valuable parameter to predict brachiocephalic arteriovenous fistula maturity. It is a potential alternative to draining vein volume flow, which is technically a difficult examination.

Objectives: Focused cardiac ultrasound (FoCUS) is increasingly applied in many specialities, and adequate education and training of physicians is therefore mandatory. This study aimed to assess the impact of artificial intelligence (AI)-assisted interactive focused cardiac ultrasound (FoCUS) teaching session on undergraduate medical students' confidence level and knowledge in cardiac ultrasound.

Methods: The AI-assisted interactive FoCUS teaching session was held during the 9th National Undergraduate Cardiovascular Conference in London in March 2023 and all undergraduate medical students were invited to attend, and 79 students enrolled and attended the training. Two workshops were conducted each over 3-hour period. Each workshop consisted of a theoretical lecture followed by a supervised hands-on session by experts, first workshop trained 39 students and the second workshop trained 40 students. The students' pre- and post-session knowledge and confidence levels were assessed by Likert-type-scale questionnaires filled in by the students before and immediately after the workshop.

Results: A total of 61 pre-session and 52 post-session questionnaires were completed. Confidence level in ultrasound skills increased significantly for all six domains after the workshop, with the greatest improvement seen in obtaining basic cardiac views (p < 0.001 for all six domains). Students strongly agreed about the effectiveness of the teaching session and supported the integration of ultrasound training into their medical curriculum.

Conclusions: AI-assisted interactive FoCUS training can be an effective and powerful tool to increase ultrasound skills and confidence levels of undergraduate medical students. Integration of such ultrasound courses into the medical curriculum should therefore be considered.

Introduction: Riedel's thyroiditis is a rare inflammatory disease of the thyroid with non-specific and varied presentations. A typical presentation and ultrasound findings are reported in this case.

Case report: A 68-year-old male is referred to Ear, Nose and Throat for a neck lump that varied in size over 2 years. An ultrasound scan identified a suspicious nodule on the left thyroid that was biopsied confirming the diagnosis of Riedel's thyroiditis.

Discussion: The aetiology, presentation and management of Riedel's thyroiditis are explored. The use of ultrasound and the utility of other imaging and biochemical tests are discussed.

Conclusion: Riedel's thyroiditis is a difficult condition to diagnose due to rarity, varied presentation, with non-specific clinical, biochemical and radiographic findings which often mimic thyroid cancers. Definitive diagnosis of Riedel's thyroiditis requires histological analysis, and while fine-needle aspirations are typically insufficient, diagnostic samples can be taken with ultrasound-guided core biopsies.

Introduction: Imaging appearances and clinical presentation of soft tissue sarcoma and soft tissue haematomas are similar. It is imperative that sarcoma is differentiated from benign soft tissue lesions due to the poor outcomes and high morbidity associated with sarcoma.

Topic description: Part 2 of this pictorial review summarises the key ultrasound appearances of soft tissue sarcoma and soft tissue haematomas and some differential diagnoses.

Discussion: Ultrasound is the first line test in the investigation of soft tissue masses. With the overlapping ultrasound appearances of soft tissue sarcoma and soft tissue haematomas, it is essential that practitioners are aware of key ultrasound appearances and understand when to escalate cases for further investigation.

Conclusion: Sound knowledge of the clinical and sonographic features of soft tissue haematomas and soft tissue sarcoma as well as recognising potential differential diagnoses is fundamental to ensuring an accurate diagnosis, timely management and improved patient outcomes.

Introduction: Sonographers are required to deliver unexpected news to expectant parents in real time during obstetric ultrasound scans. The complexity of these interactions requires sonographers to conduct the clinical task while communicating their findings and managing the expectant parent's response within the designated appointment time. Communication coaching for sonographers (CCS) is a tailored intervention that has previously been associated with improvements in confidence and news delivery practice. The current study explored the views and experiences of sonographers who completed CCS to evaluate and inform future delivery of this intervention.

Methods: Nine sonographers participated in semi-structured qualitative interviews after completing CCS. We analysed data using a Reflexive Thematic Analysis (RTA) approach.

Results: Participants reported CCS to be valuable and informative. The key themes identified included (1) innovating the path: tailored and novel training for sonographers, (2) humanising care: honouring the self, service-users and relevant others in the delivery of compassion-focused care and (3) making space: considerations for successfully delivering coaching. Participants said the coaching provided practical suggestions and was experienced as a 'safe space' for reflective practice that helped to enhance their capacity to identify and respond to emotion in others. There were practical challenges to taking part in CCS and organisational factors could act as a barrier; managerial championing of the intervention was crucial to uptake and completion.

Conclusions: Participants viewed CCS positively. To implement CCS, there needs to be organisational coordination. Further controlled studies will be needed to establish the effectiveness of CCS.

Musculoskeletal disorders are a significant global health concern, affecting over 1.71 billion individuals worldwide, with a considerable impact on quality of life and economic burden due to healthcare costs and productivity losses. In the United Kingdom, approximately one-third of the population suffers from musculoskeletal disorders, underscoring the need for effective diagnostic and management strategies. Musculoskeletal ultrasound imaging emerges as a preferred diagnostic modality, offering a balance between technical capabilities and cost-effectiveness, owing to its non-invasive nature, portability and lack of radiation exposure. However, the operator-dependent nature of musculoskeletal ultrasound imaging necessitates specialised training for medical and healthcare professionals. The integration of musculoskeletal ultrasound imaging into traditional clinical examinations, known as ultrasound imaging-assisted clinical examination (UIACE), enhances traditional diagnostic processes by providing immediate visual feedback, facilitating a more accurate and comprehensive assessment of musculoskeletal conditions. This approach not only refines diagnosis in cases with ambiguous symptoms or overlapping signs but also significantly improves patient reassurance and management strategies. In addition, incorporating musculoskeletal ultrasound imaging into medical education through ultrasound imaging-assisted clinical examination offers students a dynamic, interactive learning experience, fostering a deeper understanding of clinical anatomy and examination skills. By advocating for its systematic inclusion in the undergraduate medical curriculum, the study highlights the potential to enhance the competence and confidence of future professionals in utilising ultrasound imaging, ultimately improving patient outcomes in musculoskeletal care.

Introduction: Imaging appearances and clinical presentation of soft tissue sarcoma and soft tissue haematomas are similar. It is imperative that sarcoma is differentiated from benign soft tissue lesions due to the poor outcomes and high morbidity associated with sarcoma.

Topic description: Part 1 of this pictorial review will summarise the paucity of guidance in management of suspected haematomas, the clinical features and ultrasound techniques used in the assessment of soft tissue masses.

Discussion: Ultrasound is the first-line test in the investigation of soft tissue masses. With the overlapping ultrasound appearances of soft tissue sarcoma and soft tissue haematoma, thorough and methodical clinical examination and scanning technique is fundamental so that practitioners understand when to escalate cases for further investigation.

Conclusion: The clinical assessment and clinical history taking into consideration the intensity of trauma and ecchymosis must correlate with the ultrasound appearances. This will facilitate an accurate diagnosis, timely management and improved patient outcomes.

Introduction: Radiofrequency ablation is a procedure used to alleviate pain by destroying nerves with by radiofrequency-generated heat. Traditionally, radiofrequency ablation is preceded by diagnostic medial branch block injections, both guided by fluoroscopy. Fluoroscopic visualization of the superolateral aspect of the thoracic transverse process, where thoracic medial branch nerves occur, can be challenging due to anatomical complexities, especially in obese patients. We present a novel technique in which ultrasound was utilized in conjunction with fluoroscopy to perform medial branch block and radiofrequency ablation of the thoracic medial branch nerves.

Case report: First, two diagnostic thoracic medial branch nerve blocks were performed under ultrasound guidance. For the subsequent radiofrequency ablation, spinal needles were first advanced under ultrasound guidance to the target thoracic medial branch nerves. The position of those spinal needles was then used to guide the placement of cooled radiofrequency ablation probes using fluoroscopy. The patient reported 100% pain relief following the procedures.

Discussion: We found that the addition of ultrasound allowed us to overcome the challenge of visualizing the superolateral aspect of thoracic transverse process under fluoroscopy alone. Direct ultrasound visualization allowed us to accurately and safely perform a thoracic medial branch block and radiofrequency ablation in a patient with poor fluoroscopic anatomy, as demonstrated by the patient's complete pain relief after both medial branch block and radiofrequency ablation. We also theorize that our novel technique allows the provider to directly visualize the pleura, which could reduce the risk of severe pneumothorax associated with thoracic medial branch block and cooled radiofrequency ablation.