{"id":37065,"date":"2026-06-17T07:07:17","date_gmt":"2026-06-17T01:37:17","guid":{"rendered":"https:\/\/atsixty.com\/?p=37065"},"modified":"2026-06-17T22:49:57","modified_gmt":"2026-06-17T17:19:57","slug":"vascular-trauma-burns","status":"publish","type":"post","link":"https:\/\/atsixty.com\/index.php\/clinical\/surgery\/vascular-trauma-burns\/","title":{"rendered":"Vascular, Trauma &amp; Burns"},"content":{"rendered":"\n\n\n<meta charset=\"UTF-8\">\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n<title>Morning Rounds \u00b7 Vascular, Trauma &amp; Burns<\/title>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&#038;family=Source+Serif+4:ital,wght@0,300;0,400;0,600;1,400&#038;display=swap\" rel=\"stylesheet\">\n<style>\n#surg06 *,#surg06 *::before,#surg06 *::after{box-sizing:border-box;margin:0;padding:0}\n#surg06{\n  --surg:#2C5F8A;--surg-light:#3A78A8;--surg-pale:#EBF2F8;--surg-dark:#1E4464;\n  --correct:#2D6B47;--correct-bg:#EAF6EF;--correct-border:#3A9960;\n  --wrong:#B83232;--wrong-bg:#FDF0F0;--wrong-border:#E53935;\n  --ink:#1A2A38;--ink-mid:#3A5A6A;--ink-soft:#7A98AD;\n  --line:#D6E5EE;--cream:#F4F8FB;--warm:#FAFCFE;\n  font-family:'Source Serif 4',Georgia,serif;font-size:16px;color:var(--ink);\n  background:var(--cream);line-height:1.7;padding:0 0 64px;\n}\n#surg06 .mr-header{background:var(--surg);color:#EEF5FA;padding:34px 24px 28px;text-align:center}\n#surg06 .mr-eyebrow{font-size:0.68rem;letter-spacing:0.18em;text-transform:uppercase;font-weight:600;opacity:0.65;margin-bottom:10px}\n#surg06 .mr-title{font-family:'Playfair Display',serif;font-size:1.75rem;font-weight:700;line-height:1.2;margin-bottom:4px}\n#surg06 .mr-title em{font-style:italic;font-weight:400;opacity:0.88}\n#surg06 .mr-subtitle{font-size:0.82rem;opacity:0.7;margin-top:8px;font-style:italic}\n#surg06 .mr-chips{display:flex;justify-content:center;gap:10px;margin-top:18px;flex-wrap:wrap}\n#surg06 .mr-chip{background:rgba(255,255,255,0.13);border:1px solid rgba(255,255,255,0.22);border-radius:20px;padding:4px 13px;font-size:0.73rem}\n#surg06 .mr-sentinel{height:1px}\n#surg06 .mr-progress{position:fixed;top:0;left:0;right:0;z-index:9999;background:var(--warm);border-bottom:1px solid var(--line);box-shadow:0 2px 12px rgba(26,42,56,0.08);padding:9px 16px;display:none}\n#surg06 .mr-progress.visible{display:block}\n#surg06 .mr-prog-inner{max-width:720px;margin:0 auto;display:flex;align-items:center;justify-content:center}\n#surg06 .mr-pips{display:flex;align-items:center;justify-content:center}\n#surg06 .mr-pip-wrap{display:flex;align-items:center}\n#surg06 .mr-pip-line{width:28px;height:2px;background:var(--line);transition:background 0.35s}\n#surg06 .mr-pip-line.done{background:var(--surg)}\n#surg06 .mr-pip{width:28px;height:28px;border-radius:50%;border:2px solid var(--line);background:var(--warm);display:flex;align-items:center;justify-content:center;font-size:0.63rem;font-weight:700;color:var(--ink-soft);transition:all 0.3s;flex-shrink:0}\n#surg06 .mr-pip.correct{background:var(--correct-border);border-color:var(--correct-border);color:#fff}\n#surg06 .mr-pip.wrong{background:var(--wrong-border);border-color:var(--wrong-border);color:#fff}\n#surg06 .mr-body{max-width:720px;margin:0 auto;padding:0 16px}\n#surg06 .mr-case{background:var(--warm);border:1px solid var(--line);border-left:4px solid var(--surg);border-radius:10px;margin:28px 0;overflow:hidden;box-shadow:0 1px 6px rgba(26,42,56,0.05)}\n#surg06 .mr-case-top{padding:16px 20px 14px;display:flex;gap:14px;align-items:flex-start}\n#surg06 .mr-num{font-family:'Playfair Display',serif;font-size:2.2rem;font-weight:700;color:var(--surg);opacity:0.16;line-height:1;margin-top:-2px;flex-shrink:0}\n#surg06 .mr-meta{flex:1}\n#surg06 .mr-tag{font-size:0.61rem;font-weight:700;letter-spacing:0.14em;text-transform:uppercase;color:var(--surg);opacity:0.75;margin-bottom:5px}\n#surg06 .mr-stem{font-size:0.94rem;color:var(--ink);line-height:1.72}\n#surg06 .mr-stem strong{font-weight:600}\n#surg06 .mr-stem em{font-style:italic}\n#surg06 .mr-rule{height:1px;background:var(--line);margin:0 20px}\n#surg06 .mr-opts{padding:12px 20px 16px;display:flex;flex-direction:column;gap:8px}\n#surg06 .mr-opt{display:flex;align-items:flex-start;gap:11px;padding:10px 14px;border:1.5px solid var(--line);border-radius:8px;cursor:pointer;background:var(--warm);transition:border-color 0.15s,background 0.15s;-webkit-tap-highlight-color:transparent}\n#surg06 .mr-opt:hover{border-color:var(--surg);background:var(--surg-pale)}\n#surg06 .mr-opt.locked{cursor:default}\n#surg06 .mr-opt.locked:hover{border-color:var(--line);background:var(--warm)}\n#surg06 .mr-opt.correct{border-color:var(--correct-border);background:var(--correct-bg);cursor:default}\n#surg06 .mr-opt.correct:hover{border-color:var(--correct-border);background:var(--correct-bg)}\n#surg06 .mr-opt.wrong{border-color:var(--wrong-border);background:var(--wrong-bg);cursor:default}\n#surg06 .mr-opt.wrong:hover{border-color:var(--wrong-border);background:var(--wrong-bg)}\n#surg06 .mr-opt.dimmed{opacity:0.35;cursor:default}\n#surg06 .mr-opt.dimmed:hover{border-color:var(--line);background:var(--warm)}\n#surg06 .mr-ltr{flex-shrink:0;width:20px;height:20px;border-radius:50%;border:1.5px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:0.62rem;font-weight:700;color:var(--ink-soft);margin-top:2px;transition:all 0.15s}\n#surg06 .mr-opt.correct .mr-ltr{background:var(--correct-border);border-color:var(--correct-border);color:#fff}\n#surg06 .mr-opt.wrong .mr-ltr{background:var(--wrong-border);border-color:var(--wrong-border);color:#fff}\n#surg06 .mr-opt-text{font-size:0.9rem;color:var(--ink-mid);line-height:1.58}\n#surg06 .mr-opt.correct .mr-opt-text{color:var(--correct);font-weight:600}\n#surg06 .mr-opt.wrong .mr-opt-text{color:var(--wrong)}\n#surg06 .mr-exp{display:none;border-top:1px solid #b8d4e4;background:linear-gradient(180deg,#e4f0f7 0%,#f0f7fb 100%);padding:13px 20px 15px}\n#surg06 .mr-exp-lbl{font-size:0.61rem;font-weight:700;letter-spacing:0.12em;text-transform:uppercase;color:#1a5070;margin-bottom:6px}\n#surg06 .mr-exp-text{font-size:0.86rem;color:#12324A;line-height:1.68}\n#surg06 .mr-exp-text strong{font-weight:600}\n#surg06 .mr-exp-text em{font-style:italic}\n#surg06 .mr-img-wrap{margin-top:14px;background:var(--warm);border:1px solid var(--line);border-radius:8px;padding:14px;text-align:center}\n#surg06 .mr-img-wrap figcaption{font-size:0.73rem;color:var(--ink-soft);font-style:italic;margin-top:8px;line-height:1.4}\n#surg06 .mr-submit-wrap{text-align:center;padding:28px 16px 8px}\n#surg06 .mr-btn{background:var(--surg);color:#EEF5FA;border:none;border-radius:8px;padding:13px 44px;font-family:'Playfair Display',serif;font-size:1rem;font-weight:700;cursor:pointer;box-shadow:0 2px 8px rgba(44,95,138,0.28)}\n#surg06 .mr-btn:hover{background:var(--surg-dark)}\n#surg06 .mr-score{display:none;background:var(--warm);border:1px solid var(--line);border-top:4px solid var(--surg);border-radius:10px;margin:24px 0 0;box-shadow:0 2px 12px rgba(26,42,56,0.08);overflow:hidden}\n#surg06 .mr-score-in{padding:28px 24px;text-align:center}\n#surg06 .mr-score-ey{font-size:0.66rem;letter-spacing:0.14em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:12px;font-weight:600}\n#surg06 .mr-ring{width:98px;height:98px;border-radius:50%;background:conic-gradient(var(--surg) 0%,var(--line) 0%);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;position:relative}\n#surg06 .mr-ring::before{content:'';position:absolute;width:76px;height:76px;border-radius:50%;background:var(--warm)}\n#surg06 .mr-ring-in{position:relative;display:flex;flex-direction:column;align-items:center;line-height:1.2}\n#surg06 .mr-ring-pct{font-family:'Playfair Display',serif;font-size:1.3rem;font-weight:700;color:var(--surg)}\n#surg06 .mr-ring-sub{font-size:0.54rem;color:var(--ink-soft);text-transform:uppercase;letter-spacing:0.06em}\n#surg06 .mr-score-title{font-family:'Playfair Display',serif;font-size:1.15rem;font-weight:700;color:var(--ink);margin-bottom:4px}\n#surg06 .mr-score-net{font-size:0.9rem;color:var(--surg);font-weight:600;margin-bottom:4px}\n#surg06 .mr-verdict{font-size:0.83rem;color:var(--ink-soft);font-style:italic;margin-bottom:18px;padding:0 12px}\n#surg06 .mr-bands{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}\n#surg06 .mr-band{padding:5px 13px;border-radius:16px;font-size:0.78rem;font-weight:600}\n#surg06 .mr-band-c{background:var(--correct-bg);color:var(--correct)}\n#surg06 .mr-band-w{background:var(--wrong-bg);color:var(--wrong)}\n#surg06 .mr-band-s{background:var(--surg-pale);color:var(--surg)}\n#surg06 .mr-retry{display:block;margin:18px auto 4px;background:transparent;border:2px solid var(--surg);color:var(--surg);border-radius:8px;padding:9px 28px;font-family:'Playfair Display',serif;font-size:0.92rem;font-weight:700;cursor:pointer}\n#surg06 .mr-retry:hover{background:var(--surg);color:#EEF5FA}\n@media(max-width:480px){#surg06 .mr-title{font-size:1.4rem}#surg06 .mr-num{font-size:1.7rem}#surg06 .mr-stem{font-size:0.9rem}#surg06 .mr-opt-text{font-size:0.86rem}}\n<\/style>\n\n<!-- SVG Q3: Burns \u2014 Rule of 9s + Parkland formula -->\n<div id=\"surg06-img3\" style=\"display:none\">\n  <figure class=\"mr-img-wrap\">\n    <svg viewBox=\"0 0 560 175\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:100%;max-width:560px;display:block;margin:0 auto\">\n      <rect x=\"0\" y=\"0\" width=\"560\" height=\"175\" rx=\"8\" fill=\"#f0f5f9\"\/>\n      <text x=\"14\" y=\"18\" fill=\"#1A2A38\" font-size=\"9.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Burns \u2014 Rule of 9s (Adult) &amp; Parkland Formula<\/text>\n      <!-- Rule of 9s -->\n      <rect x=\"10\" y=\"24\" width=\"260\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <text x=\"140\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Rule of 9s \u2014 Adult TBSA<\/text>\n      <rect x=\"10\" y=\"48\" width=\"260\" height=\"19\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"140\" y=\"61\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Head &amp; neck \u2014 9%<\/text>\n      <rect x=\"10\" y=\"69\" width=\"260\" height=\"19\" rx=\"2\" fill=\"#eef4f8\"\/>\n      <text x=\"140\" y=\"82\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Each upper limb \u2014 9% (\u00d72 = 18%)<\/text>\n      <rect x=\"10\" y=\"90\" width=\"260\" height=\"19\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"140\" y=\"103\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Anterior trunk \u2014 18%<\/text>\n      <rect x=\"10\" y=\"111\" width=\"260\" height=\"19\" rx=\"2\" fill=\"#eef4f8\"\/>\n      <text x=\"140\" y=\"124\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Posterior trunk \u2014 18%<\/text>\n      <rect x=\"10\" y=\"132\" width=\"260\" height=\"19\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"140\" y=\"145\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Each lower limb \u2014 18% (\u00d72 = 36%)<\/text>\n      <rect x=\"10\" y=\"153\" width=\"260\" height=\"19\" rx=\"2\" fill=\"#eef4f8\"\/>\n      <text x=\"140\" y=\"166\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Perineum \u2014 1%  \u00b7  Total = 100%<\/text>\n      <!-- Parkland -->\n      <rect x=\"278\" y=\"24\" width=\"272\" height=\"22\" rx=\"3\" fill=\"#1E4464\"\/>\n      <text x=\"414\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Parkland Formula &amp; Key Rules<\/text>\n      <rect x=\"278\" y=\"48\" width=\"272\" height=\"29\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"414\" y=\"61\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">4 mL \u00d7 weight (kg) \u00d7 %TBSA<\/text>\n      <text x=\"414\" y=\"73\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\">Ringer's lactate (preferred over NS)<\/text>\n      <rect x=\"278\" y=\"79\" width=\"272\" height=\"22\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"414\" y=\"92\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">\u00bd in first 8 hrs from time of burn (not admission)<\/text>\n      <rect x=\"278\" y=\"103\" width=\"272\" height=\"22\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"414\" y=\"116\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">\u00bd over next 16 hrs<\/text>\n      <rect x=\"278\" y=\"127\" width=\"272\" height=\"19\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"414\" y=\"140\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7.5\" font-family=\"Georgia,serif\">Titrate to UO: 0.5\u20131 mL\/kg\/hr adults<\/text>\n      <rect x=\"278\" y=\"148\" width=\"272\" height=\"24\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"414\" y=\"159\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">IV fluids for burns \u226515% TBSA (adult)<\/text>\n      <text x=\"414\" y=\"170\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7\" font-family=\"Georgia,serif\">Children: \u226510% TBSA \u00b7 Add dextrose maintenance in children<\/text>\n    <\/svg>\n    <figcaption>\n      <strong>NEET trap:<\/strong> Parkland formula uses time of burn, not time of admission \u2014 if patient arrives 2 hours after injury, the first 8-hour volume must be given in the remaining 6 hours. Ringer's lactate is preferred (less hyperchloraemic acidosis than NS). Colloid is not given in the first 24 hours (capillary leak). <strong>Curling's ulcer<\/strong> = stress ulcer in burns (duodenum); <strong>Marjolin's ulcer<\/strong> = SCC arising in chronic burn scar (years later).\n    <\/figcaption>\n  <\/figure>\n<\/div>\n\n<!-- SVG Q5: AAA \u2014 Laplace's law + repair thresholds -->\n<div id=\"surg06-img5\" style=\"display:none\">\n  <figure class=\"mr-img-wrap\">\n    <svg viewBox=\"0 0 560 160\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:100%;max-width:560px;display:block;margin:0 auto\">\n      <rect x=\"0\" y=\"0\" width=\"560\" height=\"160\" rx=\"8\" fill=\"#f0f5f9\"\/>\n      <text x=\"14\" y=\"18\" fill=\"#1A2A38\" font-size=\"9.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Abdominal Aortic Aneurysm \u2014 Rupture Risk &amp; Repair Thresholds<\/text>\n      <!-- Headers -->\n      <rect x=\"10\" y=\"24\" width=\"130\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <rect x=\"145\" y=\"24\" width=\"130\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <rect x=\"280\" y=\"24\" width=\"130\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <rect x=\"415\" y=\"24\" width=\"135\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <text x=\"75\"  y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Diameter<\/text>\n      <text x=\"210\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Annual rupture risk<\/text>\n      <text x=\"345\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Action<\/text>\n      <text x=\"482\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Surveillance USS<\/text>\n      <!-- Rows -->\n      <rect x=\"10\" y=\"48\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"75\"  y=\"63\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7.5\" font-family=\"Georgia,serif\">&lt; 3.0 cm<\/text>\n      <rect x=\"145\" y=\"48\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"210\" y=\"63\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7.5\" font-family=\"Georgia,serif\">Negligible<\/text>\n      <rect x=\"280\" y=\"48\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"345\" y=\"63\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7.5\" font-family=\"Georgia,serif\">Reassure<\/text>\n      <rect x=\"415\" y=\"48\" width=\"135\" height=\"22\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"482\" y=\"63\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7.5\" font-family=\"Georgia,serif\">No routine follow-up<\/text>\n\n      <rect x=\"10\" y=\"72\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"75\"  y=\"87\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">3.0\u20134.4 cm<\/text>\n      <rect x=\"145\" y=\"72\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"210\" y=\"87\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">0.5\u20131% \/ year<\/text>\n      <rect x=\"280\" y=\"72\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"345\" y=\"87\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Surveillance<\/text>\n      <rect x=\"415\" y=\"72\" width=\"135\" height=\"22\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"482\" y=\"87\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Every 12 months<\/text>\n\n      <rect x=\"10\" y=\"96\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"75\"  y=\"111\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\">4.5\u20135.4 cm<\/text>\n      <rect x=\"145\" y=\"96\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"210\" y=\"111\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\">~5\u201310% \/ year<\/text>\n      <rect x=\"280\" y=\"96\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"345\" y=\"111\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\">Surveillance + optimise RF<\/text>\n      <rect x=\"415\" y=\"96\" width=\"135\" height=\"22\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"482\" y=\"111\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\">Every 3\u20136 months<\/text>\n\n      <rect x=\"10\" y=\"120\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"75\"  y=\"135\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">\u2265 5.5 cm (men)<\/text>\n      <rect x=\"145\" y=\"120\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"210\" y=\"135\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\">&gt;10% \/ year<\/text>\n      <rect x=\"280\" y=\"120\" width=\"130\" height=\"22\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"345\" y=\"135\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Elective repair<\/text>\n      <rect x=\"415\" y=\"120\" width=\"135\" height=\"22\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"482\" y=\"135\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\">EVAR or open repair<\/text>\n\n      <rect x=\"10\" y=\"144\" width=\"540\" height=\"13\" rx=\"2\" fill=\"#2C5F8A\" opacity=\"0.10\"\/>\n      <text x=\"280\" y=\"154\" text-anchor=\"middle\" fill=\"#1E4464\" font-size=\"7\" font-family=\"Georgia,serif\" font-weight=\"bold\">Women: repair threshold \u22655.0 cm \u00b7 Symptomatic or rapidly expanding (&gt;1 cm\/year): repair regardless of size \u00b7 Laplace's law: wall tension \u221d pressure \u00d7 radius<\/text>\n    <\/svg>\n    <figcaption>\n      <strong>Laplace's law explains why larger aneurysms rupture more readily:<\/strong> wall tension = pressure \u00d7 radius. As diameter doubles, tension doubles \u2014 a self-accelerating process. EVAR (endovascular aneurysm repair) has lower 30-day mortality than open repair but requires lifelong surveillance for endoleaks. Open repair is more durable. <strong>Ruptured AAA triad:<\/strong> sudden tearing back\/flank pain + hypotension + pulsatile abdominal mass \u2014 direct to theatre, no CT if haemodynamically unstable.\n    <\/figcaption>\n  <\/figure>\n<\/div>\n\n<div id=\"surg06\">\n  <div class=\"mr-header\">\n    <div class=\"mr-eyebrow\">Morning Rounds &middot; Surgery Series &middot; Round 06<\/div>\n    <div class=\"mr-title\">Vascular, Trauma &amp; Burns<br><em>Pressure, Flow &amp; the Golden Hour<\/em><\/div>\n    <div class=\"mr-subtitle\">Five cases &middot; Read carefully &middot; Trust your instinct<\/div>\n    <div class=\"mr-chips\">\n      <span class=\"mr-chip\">5 Cases<\/span>\n      <span class=\"mr-chip\">+4 \/ &minus;1 scoring<\/span>\n      <span class=\"mr-chip\">Options reshuffled<\/span>\n    <\/div>\n  <\/div>\n\n  <div class=\"mr-sentinel\" id=\"surg06-sentinel\"><\/div>\n  <div class=\"mr-progress\" id=\"surg06-progress\">\n    <div class=\"mr-prog-inner\">\n      <div class=\"mr-pips\" id=\"surg06-pips\"><\/div>\n    <\/div>\n  <\/div>\n\n  <div class=\"mr-body\">\n    <div id=\"surg06-cases\"><\/div>\n    <div class=\"mr-submit-wrap\">\n      <button class=\"mr-btn\" id=\"surg06-submit\">Submit for Debrief<\/button>\n    <\/div>\n    <div class=\"mr-score\" id=\"surg06-score\">\n      <div class=\"mr-score-in\">\n        <div class=\"mr-score-ey\">Round Complete<\/div>\n        <div class=\"mr-ring\" id=\"surg06-ring\">\n          <div class=\"mr-ring-in\">\n            <span class=\"mr-ring-pct\" id=\"surg06-pct\">0%<\/span>\n            <span class=\"mr-ring-sub\">net<\/span>\n          <\/div>\n        <\/div>\n        <div class=\"mr-score-title\">Your Debrief<\/div>\n        <div class=\"mr-score-net\" id=\"surg06-net\"><\/div>\n        <div class=\"mr-verdict\" id=\"surg06-verdict\"><\/div>\n        <div class=\"mr-bands\">\n          <span class=\"mr-band mr-band-c\" id=\"surg06-ct-c\"><\/span>\n          <span class=\"mr-band mr-band-w\" id=\"surg06-ct-w\"><\/span>\n          <span class=\"mr-band mr-band-s\" id=\"surg06-ct-s\"><\/span>\n        <\/div>\n        <button class=\"mr-retry\" id=\"surg06-retry\">&#8635; New Round<\/button>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<script>\n(function () {\n  'use strict';\n\n  var NS    = 'surg06';\n  var TOTAL = 5;\n  var MAX   = 20;\n  var LTRS  = ['A','B','C','D'];\n\n  var QS = [\n\n    {\n      id:    1,\n      tag:   'Trauma &mdash; Blunt Abdominal Injury',\n      stem:  'A <strong>28-year-old motorcyclist<\/strong> is brought to the emergency department following a high-speed road traffic accident. He is <strong>confused, pale, and diaphoretic<\/strong>. Vitals: BP 84\/50 mmHg, PR 136\/min, RR 24\/min, SpO\u2082 96% on air. Abdomen is <strong>diffusely tender and distended<\/strong>. A FAST (Focused Assessment with Sonography in Trauma) scan shows <strong>free fluid in the hepatorenal pouch (Morrison\\'s pouch) and in the pelvis<\/strong>. Chest X-ray is normal. Two large-bore IV cannulae are inserted and resuscitation commenced. Despite 1 litre of crystalloid, BP remains 88\/56 mmHg. What is the next most appropriate step?',\n      correct: 'Emergency laparotomy (damage control surgery); haemodynamically unstable blunt abdominal trauma with positive FAST is an indication for immediate surgery',\n      opts: [\n        'Emergency laparotomy (damage control surgery); haemodynamically unstable blunt abdominal trauma with positive FAST is an indication for immediate surgery',\n        'CT abdomen with contrast (trauma CT) to identify the specific organ injured before proceeding to theatre',\n        'Diagnostic peritoneal lavage (DPL) to confirm intraperitoneal haemorrhage before surgical intervention',\n        'Angioembolisation of the splenic artery as the spleen is the most commonly injured organ in blunt trauma'\n      ],\n      exp:   'This patient has <strong>haemodynamic instability + positive FAST<\/strong> \u2014 the combination that mandates <strong>immediate emergency laparotomy<\/strong> without further imaging. <br><br><strong>FAST scan:<\/strong> detects free fluid (&gt;200 mL) in pericardial sac, hepatorenal pouch (Morrison\\'s pouch \u2014 most dependent RUQ space), splenorenal pouch, and pelvis (pouch of Douglas). Free fluid in the context of trauma = haemoperitoneum until proven otherwise. <br><br><strong>The decision framework in blunt abdominal trauma:<\/strong> <br>&bull; Haemodynamically <em>unstable<\/em> + positive FAST \u2192 <strong>emergency laparotomy<\/strong> (no CT \u2014 patient cannot tolerate the delay) <br>&bull; Haemodynamically <em>stable<\/em> + positive FAST \u2192 CT abdomen with contrast (trauma CT) to grade injury and guide management (operative vs non-operative) <br>&bull; Equivocal FAST \/ unclear \u2192 DPL (now largely replaced by CT) <br><br><strong>Damage control surgery (DCS):<\/strong> abbreviated laparotomy for haemorrhage control and contamination control only \u2014 pack, clamp, temporary closure. Definitive repair deferred to 24\u201348 hours once physiology corrected (the \"lethal triad\": hypothermia + acidosis + coagulopathy). <br><br><strong>Most commonly injured organs in blunt abdominal trauma:<\/strong> spleen (MC overall) &gt; liver &gt; mesentery\/small bowel &gt; kidney. Spleen injury in a <em>stable<\/em> patient is managed non-operatively (NOM) with angio-embolisation if active blush on CT; unstable \u2192 splenectomy. CT before theatre is only acceptable if the patient is haemodynamically stable. <br><br><strong>DPL<\/strong> (peritoneal lavage with saline): historically used when USS unavailable; largely replaced by FAST + CT.',\n      imgId: null\n    },\n\n    {\n      id:    2,\n      tag:   'Vascular &mdash; Deep Vein Thrombosis',\n      stem:  'A <strong>52-year-old woman<\/strong> returns from a <strong>14-hour intercontinental flight<\/strong> and presents 2 days later with <strong>left calf pain, swelling, and erythema<\/strong>. She takes the combined oral contraceptive pill and smokes 10 cigarettes per day. Her Wells DVT score is <strong>3 (high probability)<\/strong>. D-dimer is markedly elevated at 4.8 mg\/L FEU. Compression Doppler USS confirms <strong>non-compressible left popliteal and femoral veins<\/strong>. She is haemodynamically stable with no chest symptoms. What is the most appropriate initial treatment?',\n      correct: 'Low molecular weight heparin (LMWH) followed by direct oral anticoagulant (DOAC \u2014 rivaroxaban or apixaban) for a minimum of 3 months',\n      opts: [\n        'Low molecular weight heparin (LMWH) followed by direct oral anticoagulant (DOAC \u2014 rivaroxaban or apixaban) for a minimum of 3 months',\n        'Unfractionated heparin infusion with aPTT monitoring; LMWH is contraindicated in provoked DVT from long-haul travel',\n        'IVC filter placement before anticoagulation; proximal DVT carries high PE risk and filter is the safest first step',\n        'Thrombolysis with IV alteplase; proximal DVT requires aggressive treatment to prevent post-thrombotic syndrome'\n      ],\n      exp:   '<strong>Proximal DVT<\/strong> (popliteal vein and above) is confirmed here \u2014 highest risk for pulmonary embolism (PE). This is a <strong>provoked DVT<\/strong> (long-haul flight + OCP + smoking = multiple risk factors). <br><br><strong>First-line treatment:<\/strong> <strong>LMWH<\/strong> (e.g. enoxaparin 1 mg\/kg BD or 1.5 mg\/kg OD SC) as a bridge, then transition to a <strong>DOAC<\/strong> (rivaroxaban 15 mg BD \u00d7 3 weeks then 20 mg OD, or apixaban 10 mg BD \u00d7 7 days then 5 mg BD) for a <strong>minimum 3 months<\/strong>. DOACs are now first-line over warfarin for most DVTs (simpler, no INR monitoring, comparable efficacy). Alternatively, rivaroxaban and apixaban can be started directly without LMWH bridge. <br><br><strong>Duration of anticoagulation:<\/strong> <br>&bull; Provoked (transient risk factor \u2014 surgery, travel, OCP): 3 months, then stop <br>&bull; Unprovoked first DVT: 3\u20136 months, consider extended therapy based on bleeding vs recurrence risk <br>&bull; Cancer-associated: LMWH or DOAC indefinitely while cancer active <br><br><strong>IVC filter<\/strong> is <em>not<\/em> first-line \u2014 indicated only when anticoagulation is absolutely contraindicated (active major haemorrhage, recent intracranial bleed, major surgery) or in recurrent PE despite therapeutic anticoagulation. <br><br><strong>Thrombolysis<\/strong> is reserved for massive PE with haemodynamic compromise, or phlegmasia cerulea dolens (massive iliofemoral DVT with limb ischaemia) \u2014 not for routine proximal DVT. <br><br><strong>OCP<\/strong> should be stopped \u2014 oestrogen is prothrombotic (increases clotting factors II, VII, X). Advise alternative contraception. Thrombophilia screen after anticoagulation completed.',\n      imgId: null\n    },\n\n    {\n      id:    3,\n      tag:   'Burns &mdash; Fluid Resuscitation',\n      stem:  'A <strong>70 kg man<\/strong> sustains <strong>flame burns<\/strong> in a house fire. Burns are assessed as involving the <strong>entire anterior trunk (18%), both upper limbs (18%), and the head and neck (9%)<\/strong> \u2014 total 45% TBSA, predominantly <strong>deep partial-thickness and full-thickness<\/strong>. He is brought to the emergency department at <strong>10 PM<\/strong>; the fire occurred at <strong>8 PM<\/strong>. He is haemodynamically stable, alert, and has a urine output of 20 mL\/hour via catheter. Using the Parkland formula, calculate the total fluid requirement and determine how much should be given in the <em>first delivery period<\/em>.',\n      correct: 'Total 12,600 mL; give 6,300 mL in the first 6 hours remaining (first 8 hrs from time of burn = 10 PM), then 6,300 mL over next 16 hours',\n      opts: [\n        'Total 12,600 mL; give 6,300 mL in the first 6 hours remaining (first 8 hrs from time of burn = 10 PM), then 6,300 mL over next 16 hours',\n        'Total 12,600 mL; give 6,300 mL over the next 8 hours from time of admission, then 6,300 mL over 16 hours',\n        'Total 6,300 mL; give 3,150 mL in first 8 hours and 3,150 mL in next 16 hours \u2014 colloid replaces the second half',\n        'Total 12,600 mL; give all fluid in the first 8 hours to compensate for the 2-hour pre-hospital delay'\n      ],\n      exp:   '<strong>Parkland formula:<\/strong> 4 mL \u00d7 weight (kg) \u00d7 %TBSA burned = total fluid (Ringer\\'s lactate) in first 24 hours. <br><br>= 4 \u00d7 70 \u00d7 45 = <strong>12,600 mL<\/strong> <br><br><strong>Critical timing rule:<\/strong> the 24-hour clock starts from the <strong>time of burn, not time of admission<\/strong>. The fire was at 8 PM; admission at 10 PM = 2 hours have already elapsed. <br><br>&bull; First \u00bd (6,300 mL) must be given in the first <strong>8 hours from burn time<\/strong> = by 4 AM. Time remaining from admission = 6 hours. Rate = 6,300 \u00f7 6 = <strong>1,050 mL\/hour<\/strong> for the first 6 hours. <br>&bull; Second \u00bd (6,300 mL) given over the next <strong>16 hours<\/strong> (4 AM to 8 PM next day). Rate = ~394 mL\/hour. <br><br><strong>Titrate<\/strong> all fluids to: urine output <strong>0.5\u20131 mL\/kg\/hr<\/strong> in adults (= 35\u201370 mL\/hr for this patient \u2014 current UO of 20 mL\/hr is inadequate, confirming need for aggressive resuscitation). <br><br><strong>Key rules:<\/strong> <br>&bull; Use <strong>Ringer\\'s lactate<\/strong> (not normal saline \u2014 avoids hyperchloraemic acidosis) <br>&bull; No colloid in first 24 hours (capillary leak) \u2014 albumin or FFP added after 24 hours if needed <br>&bull; Parkland applies to burns \u226515% TBSA in adults, \u226510% in children <br>&bull; Superficial burns (epidermal only) are <em>excluded<\/em> from TBSA calculation <br><br><strong>Burn depth:<\/strong> superficial (epidermal) \u2014 painful, red, no blistering; superficial partial-thickness \u2014 painful, blisters, blanches; deep partial-thickness \u2014 reduced sensation, does not blanch; full-thickness \u2014 painless, leathery, no blanching.',\n      imgId: 'surg06-img3'\n    },\n\n    {\n      id:    4,\n      tag:   'Vascular &mdash; Peripheral Arterial Disease',\n      stem:  'A <strong>58-year-old man<\/strong> with a <strong>40-pack-year smoking history<\/strong> and type 2 diabetes presents with <strong>left calf pain on walking 100 metres<\/strong>, which is completely relieved by rest within 2 minutes. He has no rest pain and no skin changes. Peripheral pulses: right femoral present, left femoral reduced; popliteal and pedal pulses absent bilaterally. <strong>ABPI (Ankle-Brachial Pressure Index) is 0.52 on the left<\/strong>. Which statement most accurately describes his condition and the primary management principle?',\n      correct: 'Fontaine stage IIb claudication; supervised exercise therapy is first-line alongside aggressive cardiovascular risk factor modification',\n      opts: [\n        'Fontaine stage IIb claudication; supervised exercise therapy is first-line alongside aggressive cardiovascular risk factor modification',\n        'Fontaine stage III critical limb ischaemia; urgent vascular surgical referral for bypass grafting within 48 hours',\n        'ABPI of 0.52 confirms critical limb ischaemia; immediate amputation should be discussed as revascularisation is unlikely to succeed',\n        'Fontaine stage IIb; anticoagulation with warfarin is the cornerstone of medical management to prevent arterial thrombosis'\n      ],\n      exp:   '<strong>Fontaine Classification of Peripheral Arterial Disease:<\/strong> <br>&bull; Stage I: asymptomatic <br>&bull; Stage IIa: claudication &gt;200 m <br>&bull; Stage IIb: claudication &lt;200 m (this patient \u2014 100 m) <br>&bull; Stage III: rest pain <br>&bull; Stage IV: tissue loss (ulceration\/gangrene) <br><br>Stages III and IV together = <strong>Chronic Limb-Threatening Ischaemia (CLTI)<\/strong> \u2014 previously called critical limb ischaemia. <br><br><strong>ABPI interpretation:<\/strong> <br>&bull; Normal: 0.9\u20131.3 <br>&bull; Mild PAD: 0.7\u20130.9 <br>&bull; Moderate PAD: 0.4\u20130.7 (this patient = 0.52) <br>&bull; Severe \/ critical ischaemia: &lt;0.4 <br>&bull; &gt;1.3: non-compressible vessels (calcified \u2014 common in diabetics; use toe pressure instead) <br><br><strong>Management of claudication (Stage II):<\/strong> <br>1. <strong>Supervised exercise therapy<\/strong> (SET) \u2014 30\u201360 min treadmill, 3\u00d7\/week, 12 weeks minimum; increases walking distance by improving collateral circulation and muscle metabolism; first-line evidence-based treatment <br>2. <strong>Cardiovascular risk modification<\/strong>: smoking cessation (most important single intervention), statin therapy, antiplatelet (aspirin or clopidogrel \u2014 reduces cardiovascular events, not claudication per se), BP control, glycaemic control <br>3. <strong>Revascularisation<\/strong> (angioplasty\/stent or bypass) \u2014 for disabling claudication failing conservative treatment, or CLTI <br><br><strong>Anticoagulation<\/strong> (warfarin\/DOAC) is <em>not<\/em> routine in PAD \u2014 antiplatelets are used. Anticoagulation is reserved for acute limb ischaemia (arterial thrombosis\/embolism) or specific situations (AF with PAD).',\n      imgId: null\n    },\n\n    {\n      id:    5,\n      tag:   'Vascular &mdash; Abdominal Aortic Aneurysm',\n      stem:  'A <strong>68-year-old man<\/strong> with hypertension and a 30-pack-year smoking history attends for his NHS AAA screening USS (offered to all men at age 65). The aortic diameter is measured at <strong>5.8 cm<\/strong>. He is asymptomatic and haemodynamically stable. CT angiography confirms an infrarenal AAA of 5.8 cm with a suitable neck and iliac anatomy. His renal function and cardiopulmonary reserve are adequate. He asks about the two main surgical options. Which statement most accurately compares <strong>EVAR and open repair<\/strong> for this patient?',\n      correct: 'EVAR has lower 30-day operative mortality but equivalent long-term survival to open repair; it requires lifelong surveillance for endoleaks and has higher reintervention rates',\n      opts: [\n        'EVAR has lower 30-day operative mortality but equivalent long-term survival to open repair; it requires lifelong surveillance for endoleaks and has higher reintervention rates',\n        'Open repair is always preferred over EVAR in fit patients as it provides better long-term survival with no need for follow-up imaging',\n        'EVAR is superior to open repair in all respects \u2014 lower mortality, lower reintervention rate, and no need for post-operative surveillance',\n        'At 5.8 cm in an asymptomatic patient, surveillance USS every 3 months is appropriate; repair is only indicated above 7 cm'\n      ],\n      exp:   'This patient meets the <strong>elective repair threshold: \u22655.5 cm in men<\/strong> (\u22655.0 cm in women, or any symptomatic or rapidly expanding AAA). At 5.8 cm, the annual rupture risk is &gt;10% \u2014 repair is indicated. <br><br><strong>EVAR (Endovascular Aneurysm Repair):<\/strong> <br>&bull; Stent-graft deployed via femoral arteries under fluoroscopic guidance \u2014 excludes aneurysm sac from circulation <br>&bull; <strong>Lower 30-day mortality<\/strong> (~1% vs ~5% for open) <br>&bull; Shorter hospital stay, faster recovery <br>&bull; <strong>Requires lifelong CT\/USS surveillance<\/strong> for endoleaks (blood flow persisting into the aneurysm sac) <br>&bull; <strong>Higher reintervention rate<\/strong> (~20% at 8 years) <br>&bull; Long-term survival (5\u201310 year) equivalent to open repair \u2014 the early mortality advantage is lost by 2\u20133 years <br><br><strong>Open repair:<\/strong> <br>&bull; Prosthetic Dacron graft sutured directly into aorta <br>&bull; Higher 30-day mortality (~3\u20135%) but <strong>more durable<\/strong> \u2014 lower reintervention rates, no endoleak risk <br>&bull; No mandatory long-term surveillance imaging <br>&bull; Preferred in younger fit patients (&lt;65), those with unfavourable anatomy for EVAR, or ruptured AAA <br><br><strong>Endoleak types (NEET favourite):<\/strong> Type I = seal failure at proximal\/distal attachment (reintervene urgently); Type II = retrograde flow from lumbar\/IMA (observe if sac not growing); Type III = fabric tear\/junction failure (reintervene); Type IV = graft porosity (usually self-limiting). <br><br><strong>Laplace\\'s law:<\/strong> wall tension = pressure \u00d7 radius. Explains exponential increase in rupture risk with diameter. Ruptured AAA = surgical emergency \u2014 mortality ~80% (50% die before reaching hospital).',\n      imgId: 'surg06-img5'\n    }\n\n  ];\n\n  var answers  = {};\n  var answered = 0;\n  var shuffled = {};\n  var done     = false;\n\n  function byId(id) { return document.getElementById(id); }\n  function gid(s)   { return byId(NS + '-' + s); }\n\n  function shuffleArr(arr) {\n    var a = arr.slice(), i, j, t;\n    for (i = a.length - 1; i > 0; i--) {\n      j = Math.floor(Math.random() * (i + 1));\n      t = a[i]; a[i] = a[j]; a[j] = t;\n    }\n    return a;\n  }\n\n  function countVal(v) {\n    var k, n = 0;\n    for (k in answers) { if (answers.hasOwnProperty(k) && answers[k] === v) n++; }\n    return n;\n  }\n\n  function buildPips() {\n    var cont = gid('pips'), i, q, wl, wp, l, p;\n    cont.innerHTML = '';\n    for (i = 0; i < QS.length; i++) {\n      q = QS[i];\n      if (i > 0) {\n        wl = document.createElement('div'); wl.className = 'mr-pip-wrap';\n        l  = document.createElement('div'); l.className  = 'mr-pip-line'; l.id = NS + '-pl' + q.id;\n        wl.appendChild(l); cont.appendChild(wl);\n      }\n      wp = document.createElement('div'); wp.className = 'mr-pip-wrap';\n      p  = document.createElement('div'); p.className  = 'mr-pip'; p.id = NS + '-pip' + q.id;\n      p.textContent = String(q.id);\n      wp.appendChild(p); cont.appendChild(wp);\n    }\n  }\n\n  function build() {\n    var cont, i, q, opts, card, top, num, meta, tag, stem,\n        rule, od, exp, lbl, txt, imgDiv, imgSrc, j, opt, ls, ts;\n    cont = gid('cases'); cont.innerHTML = '';\n    answers = {}; answered = 0; shuffled = {}; done = false;\n    gid('score').style.display = 'none';\n    buildPips();\n\n    for (i = 0; i < QS.length; i++) {\n      q = QS[i];\n      opts = shuffleArr(q.opts);\n      shuffled[q.id] = opts;\n\n      card = document.createElement('div'); card.className = 'mr-case';\n      top  = document.createElement('div'); top.className  = 'mr-case-top';\n      num  = document.createElement('div'); num.className  = 'mr-num';\n      num.textContent = q.id < 10 ? 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