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  • 1
    Online Resource
    Online Resource
    Ovid Technologies (Wolters Kluwer Health) ; 2011
    In:  Anesthesiology Vol. 114, No. 6 ( 2011-06-01), p. 1320-1324
    In: Anesthesiology, Ovid Technologies (Wolters Kluwer Health), Vol. 114, No. 6 ( 2011-06-01), p. 1320-1324
    Abstract: Epidural needle insertion is usually a blind technique where the rate of adverse events depends on the experience of the operator. A novel ultrasound method to guide epidural catheter insertion is described. Methods An ultrasound transducer (40 MHz, a -6 dB fractional bandwidth of 50%) was placed into the hollow chamber of an 18-gauge Tuohy needle. The single crystal was polished to a thickness of 50 μm, with a width of 0.5 mm. Tissue planes were identified from the reflected signals in an A-mode display. The device was inserted three times into both the lumbar and thoracic regions of five pigs (average weight, 20 kg) using a paramedian approach at an angle of 35-40°. The epidural space was identified using signals from the ligamentum flavum and dura mater. Epidural catheters were placed with each attempt and placement confirmed by contrast injection. Results The ligamentum flavum was identified in 83.3% of insertions and the dura mater in all insertions. The dura mater signal was stronger than that of the ligamentum flavum and served as a landmark in all epidural catheter insertions. Contrast studies confirmed correct placement of the catheter in the epidural space of all study animals. Conclusions This is the first study to introduce a new ultrasound probe embedded in a standard epidural needle. It is anticipated that this technique could reduce failed epidural blocks and complications caused by dural puncture.
    Type of Medium: Online Resource
    ISSN: 0003-3022
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2011
    detail.hit.zdb_id: 2016092-6
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  • 2
    In: Journal of Ultrasound in Medicine, Wiley, Vol. 41, No. 9 ( 2022-09), p. 2269-2277
    Abstract: Sarcopenia patients require more medical attention and caretaking. As such, early detection of sarcopenia and appropriate interventions are crucial for decreasing medical costs and meeting the challenges of aging populations. The aim of the present study was to develop a reliable and accurate model to estimate muscle mass using ultrasound‐derived parameters from the rectus femoris (RF), referenced by dual‐energy X‐ray absorptiometry. Methods Cross‐sectional study was performed. The study patients were recruited by Taipei Veterans General Hospital (No. 2016‐07‐013C) between 2016 and 2019. A total of 91 community‐dwelling adults (35 men and 56 women) were enrolled in this study. Ultrasound measurements of RF muscle thickness (MT), cross‐sectional area (CSA), and muscle volume (MV) were performed in B‐mode. Muscle strength and physical performance were also examined. Multivariate linear regression was used to build models for the prediction of appendicular skeletal muscle index (ASMI) based on MT, CSA, and MV values. The accuracy of ultrasound RF measurements for predicting sarcopenia was evaluated by using receiver operating characteristic (ROC) curve analysis. Results The regression equations used for ASMI prediction (adjusted body mass index, sex, and leg length) had high precision and low error. Moreover, the MV model results were close to those of the CSA model and higher than those of the MT model. The ROC analysis showed that both MV and CSA had excellent discrimination when assessing sarcopenia (AUC = 0.83 and 0.81, respectively), whereas MT showed acceptable discrimination (AUC = 0.73). Conclusions Ultrasound‐derived RF MV was accurate when predicting ASMI and diagnosing sarcopenia in community‐dwelling adults.
    Type of Medium: Online Resource
    ISSN: 0278-4297 , 1550-9613
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2067124-6
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  • 3
    Online Resource
    Online Resource
    Elsevier BV ; 2021
    In:  Ultrasound in Medicine & Biology Vol. 47, No. 7 ( 2021-07), p. 1881-1892
    In: Ultrasound in Medicine & Biology, Elsevier BV, Vol. 47, No. 7 ( 2021-07), p. 1881-1892
    Type of Medium: Online Resource
    ISSN: 0301-5629
    RVK:
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
    detail.hit.zdb_id: 1498918-9
    SSG: 12
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