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Marini TJ, Castaneda B, Satheesh M, Zhao YT, Reátegui-Rivera CM, Sifuentes W, Baran TM, Kaproth-Joslin KA, Ambrosini R, Rios-Mayhua G, Dozier AM. Sustainable volume sweep imaging lung teleultrasound in Peru: Public health perspectives from a new frontier in expanding access to imaging. Front Health Serv 2023; 3:1002208. [PMID: 37077694 PMCID: PMC10106710 DOI: 10.3389/frhs.2023.1002208] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 02/27/2023] [Indexed: 04/05/2023]
Abstract
BackgroundPulmonary disease is a common cause of morbidity and mortality, but the majority of the people in the world lack access to diagnostic imaging for its assessment. We conducted an implementation assessment of a potentially sustainable and cost-effective model for delivery of volume sweep imaging (VSI) lung teleultrasound in Peru. This model allows image acquisition by individuals without prior ultrasound experience after only a few hours of training.MethodsLung teleultrasound was implemented at 5 sites in rural Peru after a few hours of installation and staff training. Patients were offered free lung VSI teleultrasound examination for concerns of respiratory illness or research purposes. After ultrasound examination, patients were surveyed regarding their experience. Health staff and members of the implementation team also participated in separate interviews detailing their views of the teleultrasound system which were systematically analyzed for key themes.ResultsPatients and staff rated their experience with lung teleultrasound as overwhelmingly positive. The lung teleultrasound system was viewed as a potential way to improve access to imaging and the health of rural communities. Detailed interviews with the implementation team revealed obstacles to implementation important for consideration such as gaps in lung ultrasound understanding.ConclusionsLung VSI teleultrasound was successfully deployed to 5 health centers in rural Peru. Implementation assessment revealed enthusiasm for the system among members of the community along with important areas of consideration for future teleultrasound deployment. This system offers a potential means to increase access to imaging for pulmonary illness and improve the health of the global community.
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Affiliation(s)
- Thomas J. Marini
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY, United States
- Correspondence: Thomas J. Marini
| | - Benjamin Castaneda
- Departamento de Ingeniería, Laboratorio de Imágenes Médicas, Pontificia Universidad Católica del Perú, Lima, Peru
| | - Malavika Satheesh
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY, United States
| | - Yu T. Zhao
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY, United States
| | | | | | - Timothy M. Baran
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY, United States
| | | | - Robert Ambrosini
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY, United States
| | | | - Ann M. Dozier
- Department of Public Health, University of Rochester Medical Center, Rochester, NY, United States
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Loftus JR, Hu Z, Morin BR, Hobbs SK, Francis CW, Khorana AA, Rubens DJ, Kaproth-Joslin KA. Vascular Imaging in the Asymptomatic High-risk Cancer Population: A Role for Thrombosis Screening and Therapy Management. J Ultrasound Med 2022; 41:225-236. [PMID: 33772825 DOI: 10.1002/jum.15701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 03/07/2021] [Accepted: 03/11/2021] [Indexed: 06/12/2023]
Abstract
OBJECTIVES We retrospectively examined the venous thromboembolism (VTE) events diagnosed in the Prophylaxis of High-Risk Ambulatory Cancer Patients Study (PHACS), a multi-center randomized trial, to assess the value of screening vascular imaging for the diagnosis of incidental VTE in high-risk cancer patients. METHODS A total of 117 asymptomatic cancer patients with a Khorana score ≥3 starting a new systemic chemotherapy regimen were enrolled in a prospective randomized control trial. Patients underwent baseline venous ultrasound (US) of the lower extremities (LEs) and screening contrast-enhanced chest computed tomography (CT). Those without preexisting VTE were then randomized into observation or dalteparin prophylaxis groups and were screened with serial US every 4 weeks for up to 12 weeks and imaged with contrast-enhanced chest CT at 12 weeks. Any additional imaging performed during the study period was also evaluated for VTE. RESULTS Baseline prevalence of incidental VTE was 9% (n = 10) with 58% percent of VTEs diagnosed by screening US. Incidence of VTE in the randomized phase of the trial was 16% (n = 16) with 21% (n = 10) of patients in the control arm and 12% (n = 6) of patients in the dalteparin arm developing VTE, a non-significant 9% absolute risk reduction (HR = 0.69, 95% CI 0.23-1.89). Sixty-nine percent of these patients were asymptomatic with 31% of patients diagnosed by screening US. CONCLUSIONS Adding screening US to routine oncologic surveillance CT in high-risk ambulatory cancer patients with a Khorana score ≥3 can lead to increased VTE detection, with potential for decreased morbidity, mortality, and health care spending.
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Affiliation(s)
- James Ryan Loftus
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, New York, USA
| | - Zhongxia Hu
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, New York, USA
| | - Burke R Morin
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, New York, USA
| | - Susan K Hobbs
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, New York, USA
| | - Charles W Francis
- Department of Medicine, University of Rochester Medical Center, Rochester, New York, USA
| | - Alok A Khorana
- Department of Hematology and Oncology, Cleveland Clinic Main Campus, Cleveland, Ohio, USA
| | - Deborah J Rubens
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, New York, USA
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Marini TJ, Rubens DJ, Zhao YT, Weis J, O’Connor TP, Novak WH, Kaproth-Joslin KA. Lung Ultrasound: The Essentials. Radiol Cardiothorac Imaging 2021; 3:e200564. [PMID: 33969313 PMCID: PMC8098095 DOI: 10.1148/ryct.2021200564] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 01/16/2021] [Accepted: 02/05/2021] [Indexed: 12/20/2022]
Abstract
Although US of the lungs is increasingly used clinically, diagnostic radiologists are not routinely trained in its use and interpretation. Lung US is a highly sensitive and specific modality that aids in the evaluation of the lungs for many different abnormalities, including pneumonia, pleural effusion, pulmonary edema, and pneumothorax. This review provides an overview of lung US to equip the diagnostic radiologist with knowledge needed to interpret this increasingly used modality. Supplemental material is available for this article. © RSNA, 2021.
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Affiliation(s)
- Thomas J. Marini
- From the Departments of Imaging Sciences (T.J.M., D.J.R., Y.T.Z., K.A.K.J.), Medicine (J.W., W.H.N.), and Emergency Medicine (T.P.O.), University of Rochester Medical Center, School of Medicine and Dentistry, 601 Elmwood Ave, Box 655, Rochester, NY 14642
| | - Deborah J. Rubens
- From the Departments of Imaging Sciences (T.J.M., D.J.R., Y.T.Z., K.A.K.J.), Medicine (J.W., W.H.N.), and Emergency Medicine (T.P.O.), University of Rochester Medical Center, School of Medicine and Dentistry, 601 Elmwood Ave, Box 655, Rochester, NY 14642
| | - Yu T. Zhao
- From the Departments of Imaging Sciences (T.J.M., D.J.R., Y.T.Z., K.A.K.J.), Medicine (J.W., W.H.N.), and Emergency Medicine (T.P.O.), University of Rochester Medical Center, School of Medicine and Dentistry, 601 Elmwood Ave, Box 655, Rochester, NY 14642
| | - Justin Weis
- From the Departments of Imaging Sciences (T.J.M., D.J.R., Y.T.Z., K.A.K.J.), Medicine (J.W., W.H.N.), and Emergency Medicine (T.P.O.), University of Rochester Medical Center, School of Medicine and Dentistry, 601 Elmwood Ave, Box 655, Rochester, NY 14642
| | - Timothy P. O’Connor
- From the Departments of Imaging Sciences (T.J.M., D.J.R., Y.T.Z., K.A.K.J.), Medicine (J.W., W.H.N.), and Emergency Medicine (T.P.O.), University of Rochester Medical Center, School of Medicine and Dentistry, 601 Elmwood Ave, Box 655, Rochester, NY 14642
| | - William H. Novak
- From the Departments of Imaging Sciences (T.J.M., D.J.R., Y.T.Z., K.A.K.J.), Medicine (J.W., W.H.N.), and Emergency Medicine (T.P.O.), University of Rochester Medical Center, School of Medicine and Dentistry, 601 Elmwood Ave, Box 655, Rochester, NY 14642
| | - Katherine A. Kaproth-Joslin
- From the Departments of Imaging Sciences (T.J.M., D.J.R., Y.T.Z., K.A.K.J.), Medicine (J.W., W.H.N.), and Emergency Medicine (T.P.O.), University of Rochester Medical Center, School of Medicine and Dentistry, 601 Elmwood Ave, Box 655, Rochester, NY 14642
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Marini TJ, Castaneda B, Baran T, O'Connor TP, Garra B, Tamayo L, Zambrano M, Carlotto C, Trujillo L, Kaproth-Joslin KA. Lung Ultrasound Volume Sweep Imaging for Pneumonia Detection in Rural Areas: Piloting Training in Rural Peru. J Clin Imaging Sci 2019; 9:35. [PMID: 31538033 PMCID: PMC6737249 DOI: 10.25259/jcis_29_2019] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Accepted: 05/21/2019] [Indexed: 01/19/2023] Open
Abstract
Objective: Pneumonia is the leading cause of pediatric mortality worldwide among children 0–5 years old. Lung ultrasound can be used to diagnose pneumonia in rural areas as it is a portable and relatively economic imaging modality with ~95% sensitivity and specificity for pneumonia in children. Lack of trained sonographers is the current limiting factor to its deployment in rural areas. In this study, we piloted training of a volume sweep imaging (VSI) ultrasound protocol for pneumonia detection in Peru with rural health workers. VSI may be taught to individuals with limited medical/ultrasound experience as it requires minimal anatomical knowledge and technical skill. In VSI, the target organ is imaged with a series of sweeps and arcs of the ultrasound probe in relation to external body landmarks. Methods: Rural health workers in Peru were trained on a VSI ultrasound protocol for pneumonia detection. Subjects were given a brief didactic session followed by hands-on practice with the protocol. Each attempt was timed and mistakes were recorded. Participants performed the protocol until they demonstrated two mistake-free attempts. Results: It took participants a median number of three attempts (range 1–6) to perform the VSI protocol correctly. Time to mastery took 51.4 ± 17.7 min. There were no significant differences among doctors, nurses, and technicians in total training time (P = 0.43) or number of attempts to success (P = 0.72). Trainee age was not found to be significantly correlated with training time (P = 0.50) or number of attempts to success (P = 0.40). Conclusion: Rural health workers learned a VSI protocol for pneumonia detection with relative ease in a short amount of time. Future studies should investigate the clinical efficacy of this VSI protocol for pneumonia detection. Key Message: A volume sweep imaging (VSI) protocol for pneumonia detection can be taught with minimal difficulty to rural health workers without prior ultrasound experience. No difference was found in training performance related to education level or age. VSI involves no significant knowledge of anatomy or technical skill.
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Affiliation(s)
- Thomas J Marini
- Departments of Imaging Sciences, University of Rochester, Rochester, New York, United States
| | - Benjamin Castaneda
- Department of Engineering, Pontifical Catholic University of Peru, Lima, Peru
| | - Timothy Baran
- Departments of Imaging Sciences, University of Rochester, Rochester, New York, United States
| | - Timothy P O'Connor
- Departments of Emergency Medicine, University of Rochester, Rochester, New York, United States
| | - Brian Garra
- Medical Imaging Ministries of the Americas, Clermont, Florida, United States
| | - Lorena Tamayo
- Medical Innovation and Technology, San Isidrio, Peru
| | - Maria Zambrano
- Touro College of Osteopathic Medicine, Middletown, New York, United States
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Chaturvedi A, Oppenheimer D, Rajiah P, Kaproth-Joslin KA, Chaturvedi A. Contrast opacification on thoracic CT angiography: challenges and solutions. Insights Imaging 2016; 8:127-140. [PMID: 27858323 PMCID: PMC5265191 DOI: 10.1007/s13244-016-0524-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 09/06/2016] [Accepted: 09/28/2016] [Indexed: 11/25/2022] Open
Abstract
Contrast flow and enhancement patterns seen on thoracic CT angiography (CTA) can often be challenging and may often reveal more than is immediately apparent. A non-diagnostic CTA following the initial contrast injection can be secondary to many causes; these include both extrinsic factors, such as injection technique/equipment failure (iv cannula, power injector), and intrinsic, patient-related factors. Contrast pressure and flow graphs often contain useful information regarding the etiology of a non-diagnostic scan. Understanding these graphs will help the radiologist plan a repeat contrast injection to overcome the deficiencies of the first injection and thus obtain a diagnostic scan. The current review article outlines normal and abnormal intravenous contrast dynamics, discusses how to recognize etiologies of non-diagnostic scans, and ultimately addresses techniques to overcome obstacles towards obtaining normal contrast opacification of the target vessel. In addition, there are some life-threatening findings, which unless sought for, may remain hidden in plain sight. Key Points • Using contrast enhancement and flow patterns to identify the cause of a non-diagnostic CTA. • Recognize life threatening causes of altered contrast dynamics such as cardiac asystole. • Non-target vessel opacification may hold key to underlying pathophysiology.
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Affiliation(s)
- Abhishek Chaturvedi
- Department of Imaging Sciences, University of Rochester Medical Center, 601 Elmwood Ave, P.O. Box no. 648, Rochester, NY, 14642, USA.
| | - Daniel Oppenheimer
- Department of Imaging Sciences, University of Rochester Medical Center, 601 Elmwood Ave, P.O. Box no. 648, Rochester, NY, 14642, USA
| | - Prabhakar Rajiah
- Department of Radiology, University of Texas Southwestern, Dallas, TX, USA
| | - Katherine A Kaproth-Joslin
- Department of Imaging Sciences, University of Rochester Medical Center, 601 Elmwood Ave, P.O. Box no. 648, Rochester, NY, 14642, USA
| | - Apeksha Chaturvedi
- Department of Imaging Sciences, University of Rochester Medical Center, 601 Elmwood Ave, P.O. Box no. 648, Rochester, NY, 14642, USA
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Kaproth-Joslin KA, Nicola R, Dogra VS. The History of US: From Bats and Boats to the Bedside and Beyond: RSNA Centennial Article. Radiographics 2015; 35:960-70. [PMID: 25822324 DOI: 10.1148/rg.2015140300] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Katherine A Kaproth-Joslin
- From the Department of Imaging Science, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY 14642
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Kaproth-Joslin KA, Bhatt S, Scoutt LM, Rubens DJ. The Essentials of Extracranial Carotid Ultrasonographic Imaging. Radiol Clin North Am 2014; 52:1325-42. [DOI: 10.1016/j.rcl.2014.07.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Oestreich EA, Wang H, Malik S, Kaproth-Joslin KA, Blaxall BC, Kelley GG, Dirksen RT, Smrcka AV. Epac-mediated activation of phospholipase C(epsilon) plays a critical role in beta-adrenergic receptor-dependent enhancement of Ca2+ mobilization in cardiac myocytes. J Biol Chem 2006; 282:5488-95. [PMID: 17178726 DOI: 10.1074/jbc.m608495200] [Citation(s) in RCA: 144] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Recently we demonstrated that PLC(epsilon) plays an important role in beta-adrenergic receptor (betaAR) stimulation of Ca(2+)-induced Ca(2+) release (CICR) in cardiac myocytes. Here we have reported for the first time that a pathway downstream of betaAR involving the cAMP-dependent Rap GTP exchange factor, Epac, and PLC(epsilon) regulates CICR in cardiac myocytes. To demonstrate a role for Epac in the stimulation of CICR, cardiac myocytes were treated with an Epac-selective cAMP analog, 8-4-(chlorophenylthio)-2'-O-methyladenosine-3',5'-monophosphate (cpTOME). cpTOME treatment increased the amplitude of electrically evoked Ca(2+) transients, implicating Epac for the first time in cardiac CICR. This response is abolished in PLC(epsilon)(-/-) cardiac myocytes but rescued by transduction with PLC(epsilon), indicating that Epac is upstream of PLC(epsilon). Furthermore, transduction of PLC(epsilon)(+/+) cardiac myocytes with a Rap inhibitor, RapGAP1, significantly inhibited isoproterenol-dependent CICR. Using a combination of cpTOME and PKA-selective activators and inhibitors, we have shown that betaAR-dependent increases in CICR consist of two independent components mediated by PKA and the novel Epac/(epsilon) pathway. We also show that Epac/PLC(epsilon)-dependent effects on CICR are independent of sarcoplasmic reticulum loading and Ca(2+) clearance mechanisms. These data define a novel endogenous PKA-independent betaAR-signaling pathway through cAMP-dependent Epac activation, Rap, and PLC(epsilon) that enhances intracellular Ca(2+) release in cardiac myocytes.
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Affiliation(s)
- Emily A Oestreich
- Department of Pharmacology, University of Rochester School of Medicine, Rochester, New York 14642, USA
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Kelley GG, Kaproth-Joslin KA, Reks SE, Smrcka AV, Wojcikiewicz RJH. G-protein-coupled receptor agonists activate endogenous phospholipase Cepsilon and phospholipase Cbeta3 in a temporally distinct manner. J Biol Chem 2006; 281:2639-48. [PMID: 16314422 PMCID: PMC1483126 DOI: 10.1074/jbc.m507681200] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Phospholipase Cepsilon (PLCepsilon) is one of the newest members of the phosphatidylinositol-specific phospholipase C (PLC) family. Previous studies have suggested that G-protein-coupled receptors (GPCRs) stimulate phosphoinositide (PI) hydrolysis by activating PLCbeta isoforms through G(q) family G proteins and Gbetagamma subunits. Using RNA interference to knock down PLC isoforms, we demonstrate that the GPCR agonists endothelin (ET-1), lysophosphatidic acid (LPA), and thrombin, acting through endogenous receptors, couple to both endogenous PLCepsilon and the PLCbeta isoform, PLCbeta3, in Rat-1 fibroblasts. Examination of the temporal activation of these PLC isoforms, however, reveals agonist- and isoform-specific profiles. PLCbeta3 is activated acutely within the first minute of ET-1, LPA, or thrombin stimulation but does not contribute to sustained PI hydrolysis induced by LPA or thrombin and accounts for only part of ET-1 sustained stimulation. PLCepsilon, on the other hand, predominantly accounts for sustained PI hydrolysis. Consistent with this observation, reconstitution of PLCepsilon in knockdown cells dose-dependently increases sustained, but not acute, agonist-stimulated PI hydrolysis. Furthermore, combined knockdown of both PLCepsilon and PLCbeta3 additively inhibits PI hydrolysis, suggesting independent regulation of each isoform. Importantly, ubiquitination of inositol 1,4,5-trisphosphate receptors correlates with sustained, but not acute, activation of PLCepsilon or PLCbeta3. In conclusion, GPCR agonists ET-1, LPA, and thrombin activate endogenous PLCepsilon and PLCbeta3 in Rat-1 fibroblasts. Activation of these PLC isoforms displays agonist-specific temporal profiles; however, PLCbeta3 is predominantly involved in acute and PLCepsilon in sustained PI hydrolysis.
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Affiliation(s)
- Grant G Kelley
- Department of Medicine and Pharmacology, State University of New York Upstate Medical University, Syracuse, New York 13210, USA.
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