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Kaiser U, Herr W, Greiner B, Stroszczynski C, Jung EM. Mobile handheld ultrasound with VScan Air for the diagnosis of deep vein thrombosis. Clin Hemorheol Microcirc 2023; 83:149-161. [PMID: 36278343 DOI: 10.3233/ch-221598] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE This study aimed to evaluate a new W-Lan-supported ultrasound mobile technology for the diagnosis of vascular peripheral thrombosis. MATERIAL AND METHODS Fifty patients were examined by an experienced reference sonographer using high-end technology and a W-Lan supported device (VScan Air) to evaluate its diagnostic capabilities for peripheral thrombosis. RESULTS Fifty patients were examined (age, 25-88 years; male, n = 27, female n = 23). Thromboses were diagnosed in the neck (n = 1), upper leg (n = 7), lower leg (n = 49), and muscle veins (n = 25). VScan Air technique also allows the diagnosis of circumscribed deep vein thrombosis with a sufficient diagnostic certainty. Moreover, for superficial thrombi that can be well-delineated, a maximum image quality is possible compared to high-end technology. CONCLUSION The mobile VScan technology opens up new possibilities for near-patient and location-independent imaging in cases of deep vein thrombosis.
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Affiliation(s)
- Ulrich Kaiser
- Medical Clinic and Polyclinic III, University Hospital Regensburg, Regensburg, Germany
| | - Wolfgang Herr
- Medical Clinic and Polyclinic III, University Hospital Regensburg, Regensburg, Germany
| | - Barbara Greiner
- Institute for Diagnostic Radiology and Interdisciplinary Ultrasound, University Hospital Regensburg, Regensburg, Germany
| | - Christian Stroszczynski
- Institute for Diagnostic Radiology and Interdisciplinary Ultrasound, University Hospital Regensburg, Regensburg, Germany
| | - Ernst-Michael Jung
- Institute for Diagnostic Radiology and Interdisciplinary Ultrasound, University Hospital Regensburg, Regensburg, Germany
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Kaiser U, Dropco I, Reuthner K, Ertl M, Schlitt HJ, Herr W, Stroszczynski C, Jung EM. Wireless handheld focused ultrasound in student teaching during the COVID-19 pandemic: Initial results of a pilot study1. Clin Hemorheol Microcirc 2023; 85:297-305. [PMID: 36502312 DOI: 10.3233/ch-229104] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The study aim was to investigate the use of a novel device, the Vscan Air™, for rapidly and effectively performing ultrasound in student teaching during the COVID-19 pandemic. MATERIAL AND METHODS As part of the ultrasound practical course with integrated hands-on activity required by the regular medical curriculum, 100 medical students were instructed in the use of the Vscan Air™, including duplex mode. They then evaluated the quality of the ultrasound images obtained by the Vscan Air™ from previously selected organs. RESULTS 100 students were interviewed (female n = 68, male n = 32; age >18 years n = 100). The rated image quality never fell below a mean of 3 for the examined organs and portal vein flow (liver 4,58; spleen 3,99; kidneys 4,29; aorta 4,16; Douglas/rectovesical space 4,14; portal vein 4,43; pancreas 3,53; Focused Assessment with Sonography for Trauma 4,38). Scores below 3 were found sporadically in ultrasounds of the spleen (n = 4), kidneys (n = 3), Douglas/rectovesical space (n = 2), and pancreas (n = 15). The liver was rated the lowest for 59 ratings. The portal vein was evaluated in 68 cases. The hepatic artery and hepatic veins could be also visualized in all 68 examinations. The aorta was evaluated in 62 cases. CONCLUSION The Vscan Air™ technology offered adequate image quality and provided a new, fast and patient-oriented technique to support continuous ultrasound examinations and education of students, especially during a pandemic. Particularly noteworthy is the uncomplicated compliance with the required high level of hygiene.
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Affiliation(s)
- Ulrich Kaiser
- Medical Clinic and Polyclinic III, University Hospital Regensburg, Regensburg, Germany
| | - Ivor Dropco
- Clinic and Polyclinic for Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Kathrin Reuthner
- Medical Clinic and Polyclinic III, University Hospital Regensburg, Regensburg, Germany
| | - Michael Ertl
- Department of Medical Technology, University Hospital Regensburg, Regensburg, Germany
| | - Hans Jürgen Schlitt
- Clinic and Polyclinic for Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Wolfgang Herr
- Medical Clinic and Polyclinic III, University Hospital Regensburg, Regensburg, Germany
| | - Christian Stroszczynski
- Institute for Diagnostic Radiology and Interdisciplinary Ultrasound, University Hospital Regensburg, Regensburg, Germany
| | - Ernst Michael Jung
- Institute for Diagnostic Radiology and Interdisciplinary Ultrasound, University Hospital Regensburg, Regensburg, Germany
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Jung EM, Dinkel J, Verloh N, Brandenstein M, Stroszczynski C, Jung F, Rennert J. Wireless point-of-care ultrasound: First experiences with a new generation handheld device. Clin Hemorheol Microcirc 2021; 79:463-474. [PMID: 34151848 PMCID: PMC8764604 DOI: 10.3233/ch-211197] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
AIM: To evaluate the diagnostic reliability of a new generation wireless point-of care ultrasound device for abdominal and thoracic findings. MATERIAL AND METHODS: 40 patients (16 females, 24 males 19 –80 years, on average 56.1 years) were scanned by an experienced examiner using the new wireless Vscan Air device for abdominal and thoracic findings. The probe frequencies were 2–5 MHz (convex probe) and 3–12 MHz for the linear probe. As a reference standard, all patients were also examined using high-end ultrasound (LOGIQ E9/LOGIQ E10). Results were interpreted independently by two examiners in consensus, also with regard to the image quality (0–4, from not assessable = 0, to excellent 4). RESULTS: In all 40 patients (100%) examination with conventional high-end ultrasound and the Vscan Air ultrasound device was feasible. Sensitivity, specificity, positive and negative predictive value for the diagnosis of abdominal and thoracic findings were 63.3%, 100%, 100%, and 40%, respectively. Most main diagnostic findings were detected using the mobile device compared to the high-end ultrasound. Limitations were found regarding characterization and classification of hepatic and renal tumorous lesions. Image quality revealed mostly minor diagnostic limitations for the mobile device, mean 2.9 (SD ± 0.300) and was excellent or with only minor diagnostic limitations for conventional high-end ultrasound, mean 3.25 (SD ± 0.438). CONCLUSION: Due to its easy application and its high diagnostic reliability, point-of-care ultrasound systems of the latest generation represent a valuable imaging method for the primary assessment of abdominal and thoracic findings, especially in patients on intensive care units or in emergency situations.
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Affiliation(s)
- E M Jung
- Institute of Diagnostic Radiology and Interdisciplinary Ultrasound Department, University Hospital, Regensburg, Germany
| | - J Dinkel
- Institute of Diagnostic Radiology and Interdisciplinary Ultrasound Department, University Hospital, Regensburg, Germany
| | - N Verloh
- Institute of Diagnostic Radiology and Interdisciplinary Ultrasound Department, University Hospital, Regensburg, Germany
| | - M Brandenstein
- Institute of Diagnostic Radiology and Interdisciplinary Ultrasound Department, University Hospital, Regensburg, Germany
| | - C Stroszczynski
- Institute of Diagnostic Radiology and Interdisciplinary Ultrasound Department, University Hospital, Regensburg, Germany
| | - F Jung
- Institute of Biotechnology, Brandenburg University of Technology, Senftenberg, Germany
| | - J Rennert
- Institute of Diagnostic Radiology and Interdisciplinary Ultrasound Department, University Hospital, Regensburg, Germany
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Zheng BW, Zhang HJ, Gu SJ, Wu T, Wu LL, Lian YF, Tong G, Yi SH, Ren J. Contrast-enhanced ultrasonography to evaluate risk factors for short-term and long-term outcomes after liver transplantation: A pilot prospective study. Eur J Radiol 2020; 135:109475. [PMID: 33373895 DOI: 10.1016/j.ejrad.2020.109475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 11/16/2020] [Accepted: 12/07/2020] [Indexed: 02/07/2023]
Abstract
PURPOSE To evaluate whether Doppler ultrasonography (DUS) and contrast-enhanced ultrasonography (CEUS) can identify liver donation after brain death (DBD) and cardiac death (DCD) with the risk of developing short-term primary graft dysfunction (PGD) or arterial and biliary complications within 1 year. MATERIALS AND METHODS Consecutive DBD and DCD donors who underwent DUS/CEUS examinations before surgical procurement from February 2016 to June 2018 at our institution were included. The US and CEUS images of each donor liver were analysed, and the parameters were recorded. RESULTS The mean time for US examination was 32 min (range, 20-59 min), and all donors tolerated the examination well. In terms of short-term outcomes, among the 52 eligible donor livers, 20 (38.5 %) of their recipients developed PGD. The multivariable analysis showed that decreased enhancement of donor livers on CEUS (OR = 15.976, 95 % CI: 1.652-154.628, P = 0.017) and high recipient model for end-stage liver disease (MELD) scores (OR = 1.050, 95 % CI: 1.004-1.099, P = 0.034) before liver transplantation (LT) were independent factors of PGD. In contrast, for long-term complications, among the 48 eligible donor livers, 16 (33.3 %) developed arterial or biliary complications within 1 year. The multivariable analysis did not show any independent factors of arterial or biliary complications within 1 year. CONCLUSIONS A decrease in enhancement on CEUS is an independent risk factor for poor short-term outcomes of LT. CEUS may be promising for predicting post-LT outcomes of critically ill donors effectively and safely by evaluating the haemodynamic changes in DBD and DCD donor livers.
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Affiliation(s)
- Bo-Wen Zheng
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-Sen University, Guangdong Province Key Laboratory of Hepatology Research, 600 Tianhe Road, Guangzhou, Guangdong, People's Republic of China
| | - Hong-Jun Zhang
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-Sen University, Guangdong Province Key Laboratory of Hepatology Research, 600 Tianhe Road, Guangzhou, Guangdong, People's Republic of China
| | - Shi-Jie Gu
- Department of Organ Transplantation, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangdong Province Hospital of Chinese Medicine, 55 West Neihuan Road, Higher Education Mega Center, Guangzhou, Guangdong, People's Republic of China
| | - Tao Wu
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-Sen University, Guangdong Province Key Laboratory of Hepatology Research, 600 Tianhe Road, Guangzhou, Guangdong, People's Republic of China
| | - Li-Li Wu
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-Sen University, Guangdong Province Key Laboratory of Hepatology Research, 600 Tianhe Road, Guangzhou, Guangdong, People's Republic of China
| | - Yu-Fan Lian
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-Sen University, Guangdong Province Key Laboratory of Hepatology Research, 600 Tianhe Road, Guangzhou, Guangdong, People's Republic of China
| | - Ge Tong
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-Sen University, Guangdong Province Key Laboratory of Hepatology Research, 600 Tianhe Road, Guangzhou, Guangdong, People's Republic of China
| | - Shu-Hong Yi
- Department of Liver Transplantation, The Third Affiliated Hospital of Sun Yat-Sen University, Guangdong Province Key Laboratory of Hepatology Research, 600 Tianhe Road, Guangzhou, Guangdong, People's Republic of China.
| | - Jie Ren
- Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-Sen University, Guangdong Province Key Laboratory of Hepatology Research, 600 Tianhe Road, Guangzhou, Guangdong, People's Republic of China.
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