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Raz MA, Grupper A, Soetendorp H, Feder O, Amsterdam D, Schwartz D, Kliuk-Ben Bassat O. Use of lung ultrasound to assess volume status and its association with physical examination in patients with chronic kidney disease. Clin Kidney J 2024; 17:sfae167. [PMID: 39027415 PMCID: PMC11255482 DOI: 10.1093/ckj/sfae167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Indexed: 07/20/2024] Open
Abstract
Introduction Defining the optimal hydration status in patients with chronic kidney disease (CKD) is challenging, and the quest for an objective accurate method continues. Lung ultrasound (LUS) is a well-validated technique to estimate volume status. Previous studies examining the relationship between LUS and physical examination demonstrated conflicting results. We aimed to evaluate the correlation between LUS results and physical examination for assessing volume status in patients with CKD, and to compare different LUS protocols. Methods A prospective, single-center trial correlating physical examination findings to LUS results in different CKD groups, including non-dialysis and dialysis patients. Hemodialysis patients were tested twice, before and after dialysis, to compare results with ultrafiltration volume. Different LUS protocols were performed and compared, including 16-, 12-, and 8-zone measurements. Results We recruited 175 participants. A strong positive correlation was demonstrated between 16- and 12-zone protocols [r = .91 (P < .001)] and between 12- and 8-zone protocols (r = .951, P < .001). Correlation was significant in various CKD groups. While blood pressure did not correlate with LUS score, there was a significant correlation between LUS and other components of the physical examination including lung crackles (OR = 1.15 (95%CI 1.096-1.22), P < .01), pleural effusion (OR = 1.15 (95%CI 1.09-2.13), P < .01) and peripheral edema (r = .24, P < .001). Ultrafiltration volume did not correlate significantly with change in LUS scores pre- and post-dialysis (r = .169, P = .065). Conclusion Most components of physical examination findings correlated with extravascular lung water assessment on LUS in CKD patients. The use of a simplified pragmatic LUS protocol may facilitate LUS use in clinical practice.
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Affiliation(s)
- Michal Ariela Raz
- Department of Nephrology and Hypertension, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Ayelet Grupper
- Department of Nephrology and Hypertension, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Hila Soetendorp
- Department of Nephrology and Hypertension, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Omri Feder
- Department of Internal Medicine H, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Dana Amsterdam
- Department of Internal Medicine H, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Doron Schwartz
- Department of Nephrology and Hypertension, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Orit Kliuk-Ben Bassat
- Department of Nephrology and Hypertension, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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Elgenidy A, Amin MA, Awad AK, Emad A, Nassar A, Alomari O, Ibrahim R, Husain-Syed F, Aly MG. The use of lung ultrasound in evaluation of extravascular lung water in hemodialysis patients: Systematic review and meta-analysis. Hemodial Int 2024; 28:148-161. [PMID: 38413047 DOI: 10.1111/hdi.13141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 02/10/2024] [Accepted: 02/13/2024] [Indexed: 02/29/2024]
Abstract
RATIONALE AND OBJECTIVES Determining dry weight is crucial for optimizing hemodialysis, influencing efficacy, cardiovascular outcomes, and overall survival. Traditional clinical assessment methods for dry weight, relying on factors such as blood pressure and edema, frequently lack reliability. Lung ultrasound stands out as a promising tool for assessing volume status, given its non-invasiveness and reproducibility. This study aims to explore the role of Lung ultrasound in evaluating the impact of hemodialysis and ultrafiltration on extravascular lung water, with a specific focus on changes in B-lines post-hemodialysis compared to pre-hemodialysis. MATERIALS AND METHODS The research encompassed searches across PubMed, WOS, and Scopus databases for studies related to lung ultrasound and hemodialysis. A meta-analysis was then performed to determine the mean differences in various parameters before compared to after, hemodialysis, including the number of B-lines, indexed end-inspiratory and end-expiratory inferior vena cava diameters, inferior vena cava collapsibility index, weight, blood pressure, and serum levels of NT-pro-BNP. RESULTS Our meta-analysis, included 33 studies with 2301 hemodialysis patients, revealed a significant decrease in the number of B-lines post-hemodialysis (mean difference = 8.30, 95% CI [3.55 to 13.05]). Furthermore, there was a noteworthy reduction in inspiratory and expiratory inferior vena cava diameters post-hemodialysis (mean difference = 2.32, 95% CI [0.31 to 4.33]; mean difference = 4.05, 95% CI [2.44 to 5.65], respectively). Additionally, a significant positive correlation was observed between B-lines and the maximum inferior vena cava diameter both pre- and post-hemodialysis (correlation coefficient = 0.39; correlation coefficient = 0.32, respectively). CONCLUSION These findings indicate the effectiveness of lung ultrasound in detection of volume overload and assessment of response to ultrafiltration in hemodialysis patients.
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Affiliation(s)
| | | | - Ahmed K Awad
- Faculty of Medicine, Ain-Shams University, Cairo, Egypt
| | | | | | - Omar Alomari
- Hamidiye International School of Medicine, University of Health Sciences, Istanbul, Turkey
| | - Radwa Ibrahim
- Nephrology Unit, Internal Medicine Department, Assiut University, Assiut, Egypt
| | - Faeq Husain-Syed
- Department of Internal Medicine II, University Hospital Giessen and Marburg, Giessen, Germany
- Department of Nephrology, Dialysis and Transplantation, International Renal Research Institute of Vicenza, San Bortolo Hospital, Vicenza, Italy
| | - Mostafa G Aly
- Nephrology Unit, Internal Medicine Department, Assiut University, Assiut, Egypt
- Transplantation Immunology, Institute of Immunology, University Hospital, Heidelberg, Germany
- Department of Nephrology, University Hospital Heidelberg, Heidelberg, Germany
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3
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Zheng D, Liu Y, Li Y, Jin J, He Q, Shen X. Lung Ultrasound and Bioelectrical Impedance Analysis for Fluid Status Assessing Patients Undergoing Maintenance Hemodialysis. Int J Clin Pract 2024; 2024:1232211. [PMID: 38229934 PMCID: PMC10791474 DOI: 10.1155/2024/1232211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 12/12/2023] [Accepted: 12/30/2023] [Indexed: 01/18/2024] Open
Abstract
Background Volume overload is a fatal complication for people undergoing hemodialysis. Therefore, regulating a patient's "dry weight" based on their fluid status is imperative. Clinical experiences are too subjective to accurately judge a patient's fluid status, but techniques have emerged for improved fluid control in the two decades. Specifically, lung ultrasonography (LUS) uses a unique aspect of ultrasound images, the B-lines, to evaluate extravascular lung water, which has increasingly attracted attention. However, the role of B-line quantification in predicting short-mid-term death and/or cardiovascular complications is unclear. Methods Patients undergoing MHD at the hemodialysis center of Zhejiang Provincial People's Hospital from October 1, 2020, to February 28, 2021, were examined using LUS and a bioelectrical impedance analysis before and after dialysis, and related clinical data were collected. All patients were followed up for one year after the examination, and deaths and first cardiovascular events (e.g., stroke, myocardial infarction, and heart failure) during this period were recorded. Results 98 patients were enrolled and divided into three groups in relation to their mild (<16 B-lines), moderate (16-30 B-lines), or severe (>30 B-lines) hypervolemia, defined by the number of B-lines. The long-term survival rate was significantly lower in the severe group than in the mild and moderate groups. LUS and bioelectrical impedance-related parameters (e.g., extracellular water-to-water ratio) were closely related to cardiac ultrasound parameters (left ventricular ejection fraction) (P < 0.001). The optimal B-line cutoff value on LUS for predicting fluid overload (defined clinically) in patients on hemodialysis was 11.5 lines (AUC = 0.840, 95% confidence interval 0.735-0.945, P < 0.001), and the diagnostic sensitivity and specificity were both 76.5%. During the one-year follow-up period, ten deaths and six cardiovascular events occurred. The survival rate was significantly lower in the severe group than in the mild group (log-rank test χ2 = 10.050, P=0.002) but did not differ between the severe and moderate groups (χ2 = 2.629, P=0.105). Conclusion LUS is a cheap, noninvasive, simple, and repeatable volume-monitoring method that can assist with individualized fluid volume management in patients undergoing MHD. LUS results may also help to predict the short-mid-term survival rate of patients to a certain extent.
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Affiliation(s)
- Danna Zheng
- Suzhou Medical College of Soochow University, Suzhou, Jiangsu, China
- Urology & Nephrology Center, Department of Nephrology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital), Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Yueming Liu
- Urology & Nephrology Center, Department of Nephrology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital), Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Yuting Li
- Urology & Nephrology Center, Department of Nephrology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital), Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Juan Jin
- Urology & Nephrology Center, Department of Nephrology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital), Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Qiang He
- Urology & Nephrology Center, Department of Nephrology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital), Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Xiaogang Shen
- Urology & Nephrology Center, Department of Nephrology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital), Hangzhou Medical College, Hangzhou, Zhejiang, China
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Kharat A, Tallaa F, Lepage MA, Trinh E, Suri RS, Mavrakanas TA. Volume Status Assessment by Lung Ultrasound in End-Stage Kidney Disease: A Systematic Review. Can J Kidney Health Dis 2023; 10:20543581231217853. [PMID: 38148768 PMCID: PMC10750529 DOI: 10.1177/20543581231217853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 10/22/2023] [Indexed: 12/28/2023] Open
Abstract
Purpose of review Lung ultrasound is a noninvasive bedside technique that can accurately assess pulmonary congestion by evaluating extravascular lung water. This technique is expanding and is easily available. Our primary outcome was to compare the efficacy of volume status assessment by lung ultrasound with clinical evaluation, echocardiography, bioimpedance, or biomarkers. The secondary outcomes were all-cause mortality and cardiovascular events. Sources of information We conducted a MEDLINE literature search for observational and randomized studies with lung ultrasound in patients on maintenance dialysis. Methods From a total of 2363 articles, we included 28 studies (25 observational and 3 randomized). The correlation coefficients were pooled for each variable of interest using the generic inverse variance method with a random effects model. Among the clinical parameters, New York Heart Association Functional Classification of Heart Failure status and lung auscultation showed the highest correlation with the number of B-lines on ultrasound, with a pooled r correlation coefficient of .57 and .36, respectively. Among echocardiographic parameters, left ventricular ejection fraction and inferior vena cava index had the strongest correlation with the number of B-lines, with a pooled r coefficient of .35 and .31, respectively. Three randomized studies compared a lung ultrasound-guided approach with standard of care on hard clinical endpoints. Although patients in the lung ultrasound group achieved better decongestion and blood pressure control, there was no difference between the 2 management strategies with respect to death from any cause or major adverse cardiovascular events. Key findings Lung ultrasound may be considered for the identification of patients with subclinical volume overload. Trials did not show differences in clinically important outcomes. The number of studies was small and many were of suboptimal quality. Limitations The included studies were heterogeneous and of relatively limited quality.
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Affiliation(s)
- Aileen Kharat
- Division of Respirology, Geneva University Hospitals, Switzerland
| | - Faissal Tallaa
- Division of Nephrology, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Marc-Antoine Lepage
- Division of General Internal Medicine, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
| | - Emilie Trinh
- Division of Nephrology, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
| | - Rita S. Suri
- Division of Nephrology, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
| | - Thomas A. Mavrakanas
- Division of Nephrology, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
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Abstract
Lung ultrasound is increasingly used in emergency departments, medical wards, and critical care units-adult, pediatric, and neonatal. In vitro and in vivo studies show that the number and type of artifacts visualized change with lung density. This has led to the idea of a quantitative lung ultrasound approach, opening up new prospects for use not only as a diagnostic but also as a monitoring tool. Consequently, the multiple scoring systems proposed in the last few years have different technical approaches and specific clinical indications, adaptable for more or less time-dependent patients. However, multiple scoring systems may generate confusion among physicians aiming at introducing lung ultrasound in their clinical practice. This review describes the various lung ultrasound scoring systems and aims to clarify their use in different settings, focusing on technical aspects, validation with reference techniques, and clinical applications.
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Covic A, Siriopol D. Assessment and Management of Volume Overload Among Patients on Chronic Dialysis. Curr Vasc Pharmacol 2021; 19:34-40. [PMID: 32096744 DOI: 10.2174/1570161118666200225093827] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 01/30/2020] [Accepted: 01/31/2020] [Indexed: 12/11/2022]
Abstract
Volume overload is the most common complication in end-stage renal disease (ESRD) patients, being directly related to numerous complications including resistant hypertension, cardiac hypertrophy, congestive heart failure or arterial stiffness, among others. Therefore, volume overload is now considered an important risk factor for hard outcomes, like all-cause or cardiovascular mortality. Relying solely on clinical examination for assessing volume overload in ESRD patients lacks sensitivity and specificity. Numerous efforts have been made to identify new methods that could objectively assess volume status; however, each of them has important limitations. This review aims to discuss the most frequently used methods (biomarkers, inferior vena cava assessment, lung ultrasonography, bioimpedance analysis and blood volume monitoring) and to compare the advantage of each method vs. the overall/ clinical strategy.
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Affiliation(s)
- Adrian Covic
- Nephrology Department, "Grigore T. Popa" University of Medicine and Pharmacy Iasi, Iasi 700115, Romania
| | - Dimitrie Siriopol
- Nephrology Department, "Grigore T. Popa" University of Medicine and Pharmacy Iasi, Iasi 700115, Romania
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Pachtman Shetty SL, Koenig S, Tenenbaum S, Meirowitz N. Point-of-care lung ultrasound patterns in late third-trimester gravidas with and without preeclampsia. Am J Obstet Gynecol MFM 2021; 3:100310. [PMID: 33465492 DOI: 10.1016/j.ajogmf.2021.100310] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 01/06/2021] [Accepted: 01/10/2021] [Indexed: 01/21/2023]
Abstract
BACKGROUND Transthoracic point-of-care ultrasonography of the lungs has become a standard technique in critical care medicine for the evaluation of patients with respiratory signs or symptoms but has not been well studied in pregnancy. OBJECTIVE To compare lung ultrasound patterns in third-trimester gravidas with and without preeclampsia and assess interobserver agreement between 3 obstetrical providers and a physician expert in critical care lung ultrasound. STUDY DESIGN This is a prospective observational study of 262 women with singleton pregnancies between 32 0/7 and 41 6/7 weeks' gestation. Lung ultrasound examinations were performed and interpreted by a team of obstetrical care providers and then interpreted by an expert in point-of-care lung ultrasound. The number of B-lines in each of the 4 lung fields, indicating the accumulation of fluid in the interstitial space and the alveoli, was evaluated. The primary outcome was a positive study for pulmonary interstitial edema, defined as an ultrasound study with 3 or more B-lines in 2 or more bilateral lung fields. The secondary outcome was a lung ultrasound study with 1 or 2 B-lines in 1 or more lung fields or 3 B-lines in 1 lung field. Interobserver agreement in lung ultrasound interpretation between obstetrical care providers and an expert in critical care point-of-care ultrasonography of the lung was assessed. RESULTS Among healthy gravidas, no subject had a lung ultrasound examination positive for pulmonary interstitial edema. Notably, 2 patients with preeclampsia had positive lung ultrasound studies, and both had respiratory symptoms or signs of pulmonary edema. One or 2 B-lines or 3 B-lines in 1 lung field were identified in 11.4% of healthy gravidas and 18.6% of patients with preeclampsia. There was no difference in lung ultrasound patterns between healthy gravidas and those with preeclampsia. The obstetrical care providers and the lung ultrasound expert had a high proportion of agreement regarding the interpretation of negative lung ultrasound examinations. The 2 patients with clinical signs of pulmonary edema were judged to have positive studies by both the obstetrical team and the expert; however, the obstetrical team classified more studies as positive. CONCLUSION Lung ultrasound patterns in women with preeclampsia without respiratory symptoms or clinical signs of pulmonary edema are similar to the lung ultrasound patterns of healthy gravidas. Point-of-care lung ultrasound can be used to evaluate third-trimester gravidas with preeclampsia and respiratory complaints or signs concerning for pulmonary edema. Formal training is important before the widespread adoption of point-of-care lung ultrasound by obstetrical healthcare providers.
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Affiliation(s)
- Sarah L Pachtman Shetty
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Long Island Jewish Medical Center, New Hyde Park, NY.
| | - Seth Koenig
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Long Island Jewish Medical Center, New Hyde Park, NY
| | - Sara Tenenbaum
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Long Island Jewish Medical Center, New Hyde Park, NY
| | - Natalie Meirowitz
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Long Island Jewish Medical Center, New Hyde Park, NY
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Karakuş O, Anantrasirichai N, Aguersif A, Silva S, Basarab A, Achim A. Detection of Line Artifacts in Lung Ultrasound Images of COVID-19 Patients Via Nonconvex Regularization. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2020; 67:2218-2229. [PMID: 32784133 PMCID: PMC8544933 DOI: 10.1109/tuffc.2020.3016092] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 08/07/2020] [Indexed: 05/11/2023]
Abstract
In this article, we present a novel method for line artifacts quantification in lung ultrasound (LUS) images of COVID-19 patients. We formulate this as a nonconvex regularization problem involving a sparsity-enforcing, Cauchy-based penalty function, and the inverse Radon transform. We employ a simple local maxima detection technique in the Radon transform domain, associated with known clinical definitions of line artifacts. Despite being nonconvex, the proposed technique is guaranteed to convergence through our proposed Cauchy proximal splitting (CPS) method, and accurately identifies both horizontal and vertical line artifacts in LUS images. To reduce the number of false and missed detection, our method includes a two-stage validation mechanism, which is performed in both Radon and image domains. We evaluate the performance of the proposed method in comparison to the current state-of-the-art B-line identification method, and show a considerable performance gain with 87% correctly detected B-lines in LUS images of nine COVID-19 patients.
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Affiliation(s)
- Oktay Karakuş
- Visual Information LaboratoryUniversity of BristolBristolBS1 5DDU.K
| | | | - Amazigh Aguersif
- Service de RéanimationCentre Hospitalier Universitaire (CHU) Purpan31300ToulouseFrance
| | - Stein Silva
- Service de RéanimationCentre Hospitalier Universitaire (CHU) Purpan31300ToulouseFrance
| | - Adrian Basarab
- CNRS UMR 5505Institut de Recherche en Informatique de Toulouse (IRIT), University of Toulouse31062ToulouseFrance
| | - Alin Achim
- Visual Information LaboratoryUniversity of BristolBristolBS1 5DDU.K
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Optimizing B-lines on lung ultrasound: an in-vitro to in-vivo pilot study with clinical implications. J Clin Monit Comput 2020; 34:277-284. [PMID: 31089845 PMCID: PMC7429193 DOI: 10.1007/s10877-019-00321-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 05/08/2019] [Indexed: 01/05/2023]
Abstract
B-lines on lung ultrasound (US) are the hallmark of pulmonary edema. It is unknown if ultrasound machine settings or probe type matter. We created an in-vitro gelatin model. Using lung presets as baseline, five blinded investigators assessed the impact of 32 distinct settings on B-line visibility based on a Likert-Scale (LS) from 0 to10 (< 5 worse, > 5 better) separately for two probes. The experiment was then repeated in-vivo in a patient with known pulmonary edema. Based on a multivariable regression LS-ratings were similar when comparing the in-vitro versus in-vivo experiment (P = 0.16; partial R2 = 0.2%) and when using the curvilinear versus linear probe (P = 0.69; partial R2 = 0.02%) but significantly different across machine settings (P < 0.0001; partial R2 = 34.4%). Limited by its pilot character, our study suggests that (1) certain US-machine settings heavily impact B-line visibility, with no clear difference between probes; (2) in-vitro models are a valid and practical alternative to more challenging patient-based research; (3) there is significant potential to improve B-line visibility and thus diagnostic yield in the clinical setting by using lung presets, centering the focal zone at the pleural line and increasing the distal time gain compensation, most of which are (in our experience) rarely done.
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Wang AYM, Dong J, Xu X, Davies S. Volume management as a key dimension of a high-quality PD prescription. Perit Dial Int 2020; 40:282-292. [PMID: 32063208 DOI: 10.1177/0896860819895365] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Appropriate volume control is one of the key goals in a peritoneal dialysis (PD) prescription. As such it is an important component of the International Society of Peritoneal Dialysis (ISPD) guideline for "High-quality PD prescription" necessitating a review of the literature on volume management. The workgroup recognized the importance of including within its scope measures of volume status and blood pressure in prescribing high-quality PD therapy. METHODS A Medline and PubMed search for publications addressing volume status and its management in PD since the publication of the 2015 ISPD Adult Cardiovascular and Metabolic Guidelines, from October 2014 through to July 2019, was conducted. RESULTS There were no randomized controlled trials on blood pressure intervention and six randomized trials of bioimpedance-guided volume management. Generally, all studies were of small sample size, short duration, and used surrogate markers as primary outcomes. As a consequence, only "practice points" were drawn. High-quality goal-directed PD prescription should aim to achieve and maintain clinical euvolemia taking residual kidney function and its preservation into account, so that both fluid removal from peritoneal ultrafiltration and urine output are considered and residual kidney function is not compromised. Blood pressure should be included as a key objective parameter in assessing the quality of PD prescription but there is currently no evidence for a specific target in PD. Clinical examination remains the keystone of routine clinical care. CONCLUSIONS High-quality goal-directed PD prescription should include volume management as one of the key dimensions.
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Affiliation(s)
- Angela Yee-Moon Wang
- Department of Medicine, Queen Mary Hospital, University of Hong Kong, Hong Kong SAR, China
| | - Jie Dong
- Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Beijing, China
| | - Xiao Xu
- Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Beijing, China
| | - Simon Davies
- Faculty of Medicine and Health Sciences, Keele University and University Hospitals of North Midlands, Stoke-on-Trent, UK
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11
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Arun Thomas ET, Mohandas MK, George J. Comparison between clinical judgment and integrated lung and inferior vena cava ultrasonography for dry weight estimation in hemodialysis patients. Hemodial Int 2019; 23:494-503. [DOI: 10.1111/hdi.12762] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 04/26/2019] [Accepted: 04/27/2019] [Indexed: 12/15/2022]
Affiliation(s)
- E. T. Arun Thomas
- Department of NephrologyGovernment Medical College—Thiruvananthapuram Thiruvananthapuram Kerala India
| | - M. K. Mohandas
- Department of NephrologyGovernment Medical College—Thiruvananthapuram Thiruvananthapuram Kerala India
| | - Jacob George
- Department of NephrologyGovernment Medical College—Thiruvananthapuram Thiruvananthapuram Kerala India
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12
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Pardała A, Lupa M, Chudek J, Kolonko A. Lung Ultrasound B-lines Occurrence in Relation to Left Ventricular Function and Hydration Status in Hemodialysis Patients. ACTA ACUST UNITED AC 2019; 55:medicina55020045. [PMID: 30759793 PMCID: PMC6410033 DOI: 10.3390/medicina55020045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 02/06/2019] [Accepted: 02/07/2019] [Indexed: 12/12/2022]
Abstract
Background and objective: Reliable assessment of the fluid status in hemodialysis (HD) patients is often difficult. A lung ultrasound with an assessment of the B-lines (“lung comets” (LCs)) number is a novel hydration status measure. However, the occurrence of left ventricular dysfunction may have a significant effect on pulmonary congestion and further modulate the LC number. The aim of this study was to analyze to what extent left ventricular dysfunction, pulmonary hypertension, and hypervolemia affect the occurrence of LC in a cohort of prevalent HD patients. Material and methods: This cross-sectional study included 108 assessments performed in 54 patients who attended thrice weekly outpatient HD. Each patient’s fluid status was evaluated twice, prior to HD sessions, using echocardiography, LC number assessment, measurement of inferior vena cava (IVC) diameters, and bioelectric impedance analysis (BIA). Patients were stratified into three subgroups according to their LC number. Results: There were 76 separate assessments with mild (<14), 16 with moderate (14–30), and 16 with severe (>30) LC occurrence. There was a negative correlation between the LC number and left ventricular ejection fraction (LVEF), and positive correlations between the LC number and mitral gradient, and the left and right atrium area and volume, but not with the BIA-derived relative fluid overload. Multivariate linear regression analysis revealed that the LC number was proportionally related to the mitral gradient (β = 0.407 (0.247–0.567), p < 0.001) and IVC max diameter (β = 0.219 (0.060–0.378), p < 0.01), and was inversely related to LVEF (β = −0.431 (−0.580 to −0.282), p < 0.001). Conclusions: The number of LCs appears to reflect both overhydration and left ventricular dysfunction in our HD patients cohort. Therefore, heart failure must be considered as an important factor limiting the usefulness of LCs number assessment in this population.
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Affiliation(s)
| | - Mariusz Lupa
- Department of Internal Medicine, District Hospital, 34-600 Limanowa, Poland.
| | - Jerzy Chudek
- Department of Internal Medicine and Oncological Chemotherapy, Medical University of Silesia, 40-027 Katowice, Poland.
| | - Aureliusz Kolonko
- Department of Nephrology, Transplantation and Internal Medicine, Medical University of Silesia, 40-027 Katowice, Poland.
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13
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Muniz RT, Mesquita ET, Souza Junior CV, Martins WDA. Pulmonary Ultrasound in Patients with Heart Failure - Systematic Review. Arq Bras Cardiol 2019; 110:577-584. [PMID: 30226917 PMCID: PMC6023636 DOI: 10.5935/abc.20180097] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 03/21/2018] [Indexed: 12/14/2022] Open
Abstract
Pulmonary congestion is an important clinical finding in patients with heart failure (HF). Physical examination and chest X-ray have limited accuracy in detecting congestion. Pulmonary ultrasound (PU) has been incorporated into clinical practice in the evaluation of pulmonary congestion. This paper aimed to perform a systematic review of the use of PU in patients with HF, in different scenarios. A search was performed in the MEDLINE and LILACS databases in February 2017 involving articles published between 2006 and 2016. We found 26 articles in the present review, 11 of which in the emergency setting and 7 in the outpatient setting, with diagnostic and prognosis defined value and poorly studied therapeutic value. PU increased accuracy by 90% as compared to physical examination and chest X-ray for the diagnosis of congestion, being more sensitive and precocious. The skill of the PU performer did not interfere with diagnostic accuracy. The presence of B-lines ≥ 15 correlated with high BNP values (≥ 500) and E/e' ratio ≥ 15, with prognostic impact in IC patients at hospital discharge and those followed up on an outpatient basis. In conclusion, when assessing pulmonary congestion in HF, PU has an incremental value in the diagnostic and prognostic approach in all scenarios studied.
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Affiliation(s)
- Rafael Tostes Muniz
- Programa de Pós-graduação em Ciências Cardiovasculares da Universidade Federal Fluminense (UFF), Niterói, RJ - Brazil.,Complexo Hospitalar de Niterói, Niterói, RJ - Brazil
| | - Evandro Tinoco Mesquita
- Programa de Pós-graduação em Ciências Cardiovasculares da Universidade Federal Fluminense (UFF), Niterói, RJ - Brazil
| | | | - Wolney de Andrade Martins
- Programa de Pós-graduação em Ciências Cardiovasculares da Universidade Federal Fluminense (UFF), Niterói, RJ - Brazil.,Complexo Hospitalar de Niterói, Niterói, RJ - Brazil
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14
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Wang X, Burzynski JS, Hamilton J, Rao PS, Weitzel WF, Bull JL. Quantifying lung ultrasound comets with a convolutional neural network: Initial clinical results. Comput Biol Med 2019; 107:39-46. [PMID: 30776670 DOI: 10.1016/j.compbiomed.2019.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 02/03/2019] [Accepted: 02/03/2019] [Indexed: 01/15/2023]
Abstract
Lung ultrasound comets are "comet-tail" artifacts appearing in lung ultrasound images. They are particularly useful in detecting several lung pathologies and may indicate the amount of extravascular lung water. However, the comets are not always well defined and large variations in the counting results exist between observers. This study uses a convolutional neural network to quantify these lung ultrasound comets on a 4864-image clinical lung ultrasound dataset labeled by the authors. The neural network counted the number of comets correctly on 43.4% of the images and has an intraclass correlation (ICC) of 0.791 with respect to human counting on the test set. The ICC level indicates a higher correlation level than previously reported ICC between human observers. The neural network was then deployed and applied to a clinical 6272-image dataset. The correlation between the automated comet counts and the clinical parameters was examined. The comet counts correlate positively with the diastolic blood pressure (p = 0.047, r = 0.448), negatively with ejection fraction (p = 0.061, r = -0.513), and negatively with BMI (p = 0.009, r = -0.566). The neural network can be alternatively formulated as a diagnostic test for comet-positive images with 80.8% accuracy. The results could potentially be improved with a larger dataset and a refined approach to the neural networks used.
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Affiliation(s)
- Xianglong Wang
- Biomedical Engineering, College of Engineering, University of Michigan - Ann Arbor, Ann Arbor, MI, USA
| | - Joseph S Burzynski
- Biomedical Engineering, College of Engineering, University of Michigan - Ann Arbor, Ann Arbor, MI, USA
| | | | - Panduranga S Rao
- Division of Nephrology, Internal Medicine, University of Michigan - Ann Arbor, Ann Arbor, MI, USA
| | - William F Weitzel
- Division of Nephrology, Internal Medicine, University of Michigan - Ann Arbor, Ann Arbor, MI, USA; Ann Arbor Veteran Affairs Healthcare System, Ann Arbor, MI, USA
| | - Joseph L Bull
- Biomedical Engineering, School of Science and Engineering, Tulane University, New Orleans, LA, USA.
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15
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Seidowsky A, Vilaine È, Mansencal N, Ébel A, Villain C, Cheddani L, Massy ZA. [Pulmonary ultrasound and dialysis]. Nephrol Ther 2018; 14 Suppl 1:S73-S81. [PMID: 29606266 DOI: 10.1016/j.nephro.2018.02.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Accepted: 02/09/2018] [Indexed: 01/08/2023]
Abstract
Profound deficit of the body fluid composition regulation system is present at the end stage kidney disease, leading to the increase the risk of acute or chronic volume overload, which impacts the morbidity and mortality in these patients. Pulmonary ultrasound by its ability to estimate extrapulmonary water at an infraclinical stage has helped to make progress in this area. Line B is the element of fundamental semiology that reflects the presence of water in the pulmonary alveoli. The alteration of left ventricular function and the increase of pulmonary capillary permeability are the determining factors in the genesis of subclinical pulmonary congestion and are positively correlated with B-lines. Because of its non-invasive nature, its ease of use, its intra- and interoperability reproducibility and its ease of learning, nephrologists can be efficiently and quickly trained to use it to measure pulmonary congestion. Recent data have shown an epidemiological association between B-lines and mortality in end stage kidney disease patients. The causal role of subclinical pulmonary congestion assessed by these B lines in the genesis of detrimental events is being evaluated by a randomized, multicentre, open-label European clinical trial (Lung water by ultra-sound guided treatment [LUST] trial). The clinical usefulness of pulmonary ultrasound in the management of subclinical pulmonary congestion in patients with end stage kidney disease remains to be determined, but it could be considered from now as an additional tool to improve the management of this congestion, possibly by complementing bioimpedancemetry data.
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Affiliation(s)
- Alexandre Seidowsky
- Service de néphrologie-dialyse, CHU Ambroise-Paré, 9, avenue du Général-de-Gaulle, 92104 Boulogne-Billancourt, France; Service de néphrologie-hémodialyse, hôpital américain de Paris, 63, boulevard Victor-Hugo, 92200 Neuilly-sur-Seine, France
| | - Ève Vilaine
- Service de néphrologie-dialyse, CHU Ambroise-Paré, 9, avenue du Général-de-Gaulle, 92104 Boulogne-Billancourt, France; Inserm U1018, Team 5, centre de recherche en épidémiologie et santé des populations (CESP), 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France; Université Versailles-Saint-Quentin, 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France; Paris-Saclay université 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France
| | - Nicolas Mansencal
- Service de cardiologie, CHU Ambroise-Paré, 9, avenue du Général-de-Gaulle, 92104 Boulogne-Billancourt, France
| | - Alexandre Ébel
- Service de néphrologie-dialyse, CHU Ambroise-Paré, 9, avenue du Général-de-Gaulle, 92104 Boulogne-Billancourt, France
| | - Cédric Villain
- Service de néphrologie-dialyse, CHU Ambroise-Paré, 9, avenue du Général-de-Gaulle, 92104 Boulogne-Billancourt, France; Inserm U1018, Team 5, centre de recherche en épidémiologie et santé des populations (CESP), 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France; Université Versailles-Saint-Quentin, 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France; Paris-Saclay université 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France
| | - Lynda Cheddani
- Service de néphrologie-dialyse, CHU Ambroise-Paré, 9, avenue du Général-de-Gaulle, 92104 Boulogne-Billancourt, France; Inserm U1018, Team 5, centre de recherche en épidémiologie et santé des populations (CESP), 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France; Université Versailles-Saint-Quentin, 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France; Paris-Saclay université 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France
| | - Ziad A Massy
- Service de néphrologie-dialyse, CHU Ambroise-Paré, 9, avenue du Général-de-Gaulle, 92104 Boulogne-Billancourt, France; Inserm U1018, Team 5, centre de recherche en épidémiologie et santé des populations (CESP), 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France; Université Versailles-Saint-Quentin, 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France; Paris-Saclay université 16, avenue Paul-Vaillant-Couturier, 94807 Villejuif cedex, France.
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16
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Miller DL, Dong Z, Dou C, Raghavendran K. Pulmonary Capillary Hemorrhage Induced by Different Imaging Modes of Diagnostic Ultrasound. ULTRASOUND IN MEDICINE & BIOLOGY 2018; 44:1012-1021. [PMID: 29428168 PMCID: PMC5869104 DOI: 10.1016/j.ultrasmedbio.2017.11.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 11/03/2017] [Accepted: 11/13/2017] [Indexed: 05/16/2023]
Abstract
The induction of pulmonary capillary hemorrhage (PCH) is a well-established non-thermal biological effect of pulsed ultrasound in animal models. Typically, research has been done using laboratory pulsed ultrasound systems with a fixed beam and, recently, by B-mode diagnostic ultrasound. In this study, a GE Vivid 7 Dimension ultrasound machine with 10 L linear array probe was used at 6.6 MHz to explore the relative PCH efficacy of B-mode imaging, M-mode (fixed beam), color angio mode Doppler imaging and pulsed Doppler mode (fixed beam). Anesthetized rats were scanned in a warmed water bath, and thresholds were determined by scanning at different power steps, 2 dB apart, in different groups of six rats. Exposures were performed for 5 min, except for a 15-s M-mode group. Peak rarefactional pressure amplitude thresholds were 1.5 MPa for B-mode and 1.1 MPa for angio Doppler mode. For the non-scanned modes, thresholds were 1.1 MPa for M-mode and 0.6 MPa for pulsed Doppler mode with its relatively high duty cycle (7.7 × 10-3 vs. 0.27 × 10-3 for M-mode). Reducing the duration of M-mode to 15 s (from 300 s) did not significantly reduce PCH (area, volume or depth) for some power settings, but the threshold was increased to 1.4 MPa. Pulmonary sonographers should be aware of this unique adverse bio-effect of diagnostic ultrasound and should consider reduced on-screen mechanical index settings for potentially vulnerable patients.
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Affiliation(s)
- Douglas L Miller
- Department of Radiology, University of Michigan Health System, Ann Arbor, Michigan, USA.
| | - Zhihong Dong
- Department of Radiology, University of Michigan Health System, Ann Arbor, Michigan, USA
| | - Chunyan Dou
- Department of Radiology, University of Michigan Health System, Ann Arbor, Michigan, USA
| | - Krishnan Raghavendran
- Department of Surgery, University of Michigan Health System, Ann Arbor, Michigan, USA
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17
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Covic A, Siriopol D, Voroneanu L. Use of Lung Ultrasound for the Assessment of Volume Status in CKD. Am J Kidney Dis 2018; 71:412-422. [DOI: 10.1053/j.ajkd.2017.10.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Accepted: 10/12/2017] [Indexed: 12/20/2022]
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18
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Abstract
PURPOSE OF REVIEW The aim of this article is to present current information on techniques for fluid status assessment in patients with kidney disease. The methods can be broadly categorized into biomarkers, ultrasound, blood volume monitoring, and bioimpedance. RECENT FINDINGS Biomarkers including atrial natriuretic peptide and B-type natriuretic peptide have been shown to provide information about relative changes in fluid status. Ultrasound is applied to measure inferior vena cava indices, pulmonary indicators, and vascular indicators of fluid overload. Relative blood volume monitoring is used to measure change in intravascular fluid during hemodialysis. While in principle appealing, measurement of absolute blood volume has seen limited use to date. Bioimpedance techniques such as vector analysis, whole body, and regional bioimpedance spectroscopy, have shown their ability to estimate fluid status. SUMMARY The interpretation of biomarkers is complicated by the presence of cardiac disease. All ultrasound methods have some correlation with fluid status; however, operator dependency limits their routine use. Bioimpedance methods and relative blood volume monitoring are increasingly used to assess fluid status in patients with acute or chronic kidney disease. Measurement of absolute blood volume holds promise for the future.
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19
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Ultrasound-Based Detection of Lung Abnormalities Using Single Shot Detection Convolutional Neural Networks. SIMULATION, IMAGE PROCESSING, AND ULTRASOUND SYSTEMS FOR ASSISTED DIAGNOSIS AND NAVIGATION 2018. [DOI: 10.1007/978-3-030-01045-4_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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20
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Allinovi M, Saleem M, Romagnani P, Nazerian P, Hayes W. Lung ultrasound: a novel technique for detecting fluid overload in children on dialysis. Nephrol Dial Transplant 2017; 32:541-547. [PMID: 27190380 DOI: 10.1093/ndt/gfw037] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 01/29/2016] [Indexed: 12/18/2022] Open
Abstract
Background Optimizing the target weight of infants and children on dialysis remains an important clinical challenge. The use of ultrasound to detect fluid overload in adult patients on dialysis is receiving growing attention. We hypothesized that fluid overload can be quantified in infants and children receiving dialysis using lung ultrasound. Methods In this prospective observational study, infants and children receiving dialysis for end-stage renal disease (ESRD) or acute kidney injury (AKI) in a regional paediatric nephrology centre were eligible. Lung ultrasound examinations were performed during in-centre dialysis, on home visits or in an outpatient clinic. Fluid overload was assessed by quantifying B-lines on ultrasound and compared with proportional (%) increase in patient weight from the target weight. Results A total of 142 ultrasound assessments were performed in 23 children. In children with AKI, median B-line score reduced from 5 (range 0-22) at presentation to 1.5 (0-4) at recovery (P = 0.04) with concurrent improvement in fluid overload judged by weight from 7.2 (-1.9 to 15.2)% to 0%. A linear correlation between lung ultrasound B-line score and fluid overload judged by weight was observed in children with AKI (r = 0.83) and ESRD (r = 0.61). Inter-observer variability was acceptable. Conclusions Lung ultrasound is a practical and sensitive method of quantifying subclinical fluid overload in infants and children on dialysis. Interventional studies to determine the benefits of using lung ultrasound to optimize the target weight for children with ESRD are merited.
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Affiliation(s)
- Marco Allinovi
- Bristol Children's Renal Unit, Bristol Royal Hospital for Children, Bristol, UK.,Paediatric Nephrology Unit, Meyer Children's Hospital, Florence, Italy
| | - Moin Saleem
- Bristol Children's Renal Unit, Bristol Royal Hospital for Children, Bristol, UK.,University of Bristol, Bristol, UK
| | - Paola Romagnani
- Paediatric Nephrology Unit, Meyer Children's Hospital, Florence, Italy.,University of Florence, Florence, Italy
| | - Peiman Nazerian
- Department of Emergency Medicine, Careggi University Hospital, Florence, Italy
| | - Wesley Hayes
- Bristol Children's Renal Unit, Bristol Royal Hospital for Children, Bristol, UK.,University of Bristol, Bristol, UK
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21
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Anantrasirichai N, Hayes W, Allinovi M, Bull D, Achim A. Line Detection as an Inverse Problem: Application to Lung Ultrasound Imaging. IEEE TRANSACTIONS ON MEDICAL IMAGING 2017; 36:2045-2056. [PMID: 28682247 PMCID: PMC6051490 DOI: 10.1109/tmi.2017.2715880] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 05/15/2017] [Accepted: 06/11/2017] [Indexed: 05/25/2023]
Abstract
This paper presents a novel method for line restoration in speckle images. We address this as a sparse estimation problem using both convex and non-convex optimization techniques based on the Radon transform and sparsity regularization. This breaks into subproblems, which are solved using the alternating direction method of multipliers, thereby achieving line detection and deconvolution simultaneously. We include an additional deblurring step in the Radon domain via a total variation blind deconvolution to enhance line visualization and to improve line recognition. We evaluate our approach on a real clinical application: the identification of B-lines in lung ultrasound images. Thus, an automatic B-line identification method is proposed, using a simple local maxima technique in the Radon transform domain, associated with known clinical definitions of line artefacts. Using all initially detected lines as a starting point, our approach then differentiates between B-lines and other lines of no clinical significance, including Z-lines and A-lines. We evaluated our techniques using as ground truth lines identified visually by clinical experts. The proposed approach achieves the best B-line detection performance as measured by the F score when a non-convex [Formula: see text] regularization is employed for both line detection and deconvolution. The F scores as well as the receiver operating characteristic (ROC) curves show that the proposed approach outperforms the state-of-the-art methods with improvements in B-line detection performance of 54%, 40%, and 33% for [Formula: see text], [Formula: see text], and [Formula: see text], respectively, and of 24% based on ROC curve evaluations.
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22
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Simoni F, Vitturi N, Dugo M. Usefulness of ultrasound imaging in overhydrated nephropathic patients. J Ultrasound 2016; 19:299-300. [DOI: 10.1007/s40477-016-0213-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 05/03/2016] [Indexed: 10/21/2022] Open
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23
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Miller DL, Dong Z, Dou C, Raghavendran K. Influence of Scan Duration on Pulmonary Capillary Hemorrhage Induced by Diagnostic Ultrasound. ULTRASOUND IN MEDICINE & BIOLOGY 2016; 42:1942-50. [PMID: 27117631 PMCID: PMC4912944 DOI: 10.1016/j.ultrasmedbio.2016.03.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 03/02/2016] [Accepted: 03/20/2016] [Indexed: 05/05/2023]
Abstract
Diagnostic ultrasound can induce pulmonary capillary hemorrhage (PCH) in rats and display this as "comet tail" artifacts (CTAs) after a time delay. To test the hypothesis that no PCH occurs for brief scans, anesthetized rats were scanned using a 6-MHz linear array for different durations. PCH was characterized by ultrasound CTAs, micro-computed tomography (μCT), and measurements of fixed lung tissue. The μCT images revealed regions of PCH, sometimes penetrating the entire depth of a lobe, which were reflected in the fixed tissue measurements. At -3 dB of power, PCH was substantial for 300-s scans, but not significant for 25-s scans. At 0 dB, PCH was not strongly dependent on scan durations of 300 to 10 s. Contrary to the hypothesis, CTAs were not evident during most 10-s scans (p > 0.05), but PCH was significant (p = 0.02), indicating that PCH could occur without evidence of the injury in the images.
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Affiliation(s)
- Douglas L Miller
- Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA.
| | - Zhihong Dong
- Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Chunyan Dou
- Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA
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24
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Gullett J, Donnelly JP, Sinert R, Hosek B, Fuller D, Hill H, Feldman I, Galetto G, Auster M, Hoffmann B. Interobserver agreement in the evaluation of B-lines using bedside ultrasound. J Crit Care 2015; 30:1395-9. [DOI: 10.1016/j.jcrc.2015.08.021] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 08/16/2015] [Accepted: 08/24/2015] [Indexed: 11/26/2022]
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