19 research outputs found
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Evaluation of the American college of surgeons thyroid and parathyroid ultrasound course: Results of a web-based survey.
Objectives/hypothesisThe American College of Surgeons Thyroid and Parathyroid Ultrasound Skills-Oriented Course (TPUSC) was designed to teach surgeons how to interpret and perform office-based head and neck ultrasound (HNUS). The objective of this study was to survey attendees of the TPUSC to evaluate the usefulness of the course, to track surgeon performed HNUS practice patterns, and to help identify potential roadblocks to incorporation of HNUS into a surgeon's practice.Study designCross-sectional survey.MethodsA Web-based survey was sent to 952 surgeons who completed the TPUSC between 2010 and 2014. Questions included surgeon specialty, practice type, Likert scale rating of the TPUSC, competency with different HNUS procedures, and current HNUS practice patterns.ResultsThe response rate was 24%. On a scale from 1 (not useful) to 5 (extremely valuable), the mean course usefulness rating was 4.2. Educational goals were met for 194 (92%) surgeons, and 162 (77%) surgeons reported performing HNUS in their practice. Of 48 surgeons not performing HNUS, 24 (50%) attributed insufficient time in their clinic schedule, and 21 (44%) attributed high equipment costs.ConclusionsThe TPUSC is a valuable educational experience for surgeons seeking to gain proficiency in HNUS. The majority of TPUSC graduates gain competency with at least one type of HNUS procedure following the course.Level of evidenceNA Laryngoscope, 127:1950-1958, 2017
Ultrafast X‑ray Absorption Near Edge Structure Reveals Ballistic Excited State Structural Dynamics
Polarized ultrafast
time-resolved X-ray absorption near edge structure
(XANES) allows characterization of excited state dynamics following
excitation. Excitation of vitamin B<sub>12</sub>, cyanocobalamin (CNCbl),
in the αβ-band at 550 nm and the γ-band at 365 nm
was used to uniquely resolve axial and equatorial contributions to
the excited state dynamics. The structural evolution of the excited
molecule is best described by a coherent ballistic trajectory on the
excited state potential energy surface. Prompt expansion of the Co
cavity by ca. 0.03 Ã… is followed by significant elongation of
the axial bonds (>0.25 Ã…) over the first 190 fs. Subsequent
contraction
of the Co cavity in both axial and equatorial directions results
in the relaxed S<sub>1</sub> excited state structure within 500 fs
of excitation