Make a proper PowerPoint presentation on the topic from blind to brilliant landmark and pns vs USG guided blocks describing introduction, principles methods, sites ,and mainly the advantages .
Reading File
Reading File
Reading File
Finding Sources
Finding Sources
Finding Sources
Finding Sources
Searching the Web
PNS vs ultrasound guided peripheral nerve blocks blind technique advantages comparison
Now let me read the key textbook content from Miller's Anesthesia on this topic:
Reading File
Reading Web Page
https://www.nysora.com/regional-anesthesia/topics/equipment/…
Reading File
I now have excellent content. Let me read the pptxgenjs guide more and then build the presentation:
Reading File
Now I have enough content to build the full presentation. Let me create it:
Running Command
mkdir -p /home/daytona/workspace/nerve-blocks-pptx && ls /home/daytona/workspace/
Writing File
~/nerve-blocks-pptx/create_pptx.js
const pptxgen = require("pptxgenjs");
const pres = new pptxgen();
pres.layout = "LAYOUT_16x9";
pres.author = "Regional Anesthesia";
pres.title = "From Blind to Brilliant: PNS vs USG Guided Nerve Blocks";
// ─── THEME ───────────────────────────────────────────────────────────────────
const C = {
navy: "0D2137", // dominant dark
blue: "1565C0", // supporting
teal: "00838F", // supporting accent
accent: "29B6F6", // bright accent
gold: "FFC107", // highlight / tag
white: "FFFFFF",
offwhite: "F0F4F8",
lightblue:"E3F2FD",
text: "1A2A3A",
muted: "607D8B",
};
// ─── HELPER: add header bar ───────────────────────────────────────────────────
function addHeader(slide, title, subtitle) {
// navy top band
slide.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 1.1,
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slide.addShape(pres.shapes.RECTANGLE, {
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slide.addText(title, {
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if (subtitle) {
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fontSize: 13, color: C.accent, fontFace: "Calibri", margin: 0, italic: true
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}
// footer
slide.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 5.42, w: 10, h: 0.2,
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slide.addText("Regional Anesthesia | From Blind to Brilliant", {
x: 0.3, y: 5.42, w: 9.4, h: 0.2,
fontSize: 8, color: C.accent, fontFace: "Calibri", margin: 0, align: "center"
});
}
// ─── HELPER: bullet list ─────────────────────────────────────────────────────
function makeBullets(items, opts = {}) {
return items.map((item, i) => ({
text: item,
options: {
bullet: { code: "25A0", color: opts.bulletColor || C.teal },
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color: opts.color || C.text,
fontFace: "Calibri",
breakLine: i < items.length - 1,
paraSpaceAfter: 4
}
}));
}
function makeSubBullets(items, opts = {}) {
return items.map((item, i) => ({
text: item,
options: {
bullet: { code: "25B6", color: opts.bulletColor || C.accent, indent: 20 },
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color: opts.color || C.muted,
fontFace: "Calibri",
indentLevel: 1,
breakLine: i < items.length - 1,
paraSpaceAfter: 3
}
}));
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 1 — TITLE
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
// full background
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s.addShape(pres.shapes.RECTANGLE, {
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s.addShape(pres.shapes.RECTANGLE, {
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// main title
s.addText("FROM BLIND TO BRILLIANT", {
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fontSize: 36, bold: true, color: C.white, fontFace: "Calibri",
charSpacing: 3
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// subtitle
s.addText("Landmark & PNS vs Ultrasound-Guided Peripheral Nerve Blocks", {
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// tagline box
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s.addText("Introduction · Principles · Methods · Sites · Advantages", {
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fontSize: 12, color: C.white, fontFace: "Calibri", align: "center", bold: true, margin: 0
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// specialty line
s.addText("Department of Anaesthesiology | Regional Anesthesia CME", {
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// sonogram wave graphic (decorative lines)
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}
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 2 — OVERVIEW / AGENDA
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
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addHeader(s, "Presentation Overview", "What we will cover today");
const topics = [
{ num: "01", title: "Introduction & Historical Evolution", col: C.navy },
{ num: "02", title: "Landmark / Blind Technique", col: C.blue },
{ num: "03", title: "Peripheral Nerve Stimulator (PNS)", col: C.teal },
{ num: "04", title: "Ultrasound-Guided Nerve Blocks (USG)", col: C.blue },
{ num: "05", title: "Block Sites & Anatomical Regions", col: C.teal },
{ num: "06", title: "Comparison & Advantages", col: C.navy },
];
const cols = [0, 5]; // 2 columns
topics.forEach((t, i) => {
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}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 3 — INTRODUCTION
// ═══════════════════════════════════════════════════════════════════════════════
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addHeader(s, "Introduction to Regional Nerve Blockade", "Setting the stage");
// intro text
s.addText("Regional anesthesia is only successful when local anesthetic is administered close to the targeted nerve.", {
x: 0.4, y: 1.25, w: 9.2, h: 0.55,
fontSize: 14, color: C.text, fontFace: "Calibri", italic: true,
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// left column
s.addText("Why Nerve Blocks?", {
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fontSize: 15, bold: true, color: C.navy, fontFace: "Calibri"
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s.addText(makeBullets([
"Superior analgesia vs systemic opioids",
"Reduced general anesthesia requirements",
"Faster recovery & discharge",
"Decreased PONV and opioid side-effects",
"Ideal for day-case & ambulatory surgery",
"Enable surgery in high-risk patients"
], { fontSize: 13 }), {
x: 0.4, y: 2.35, w: 4.4, h: 2.95,
fontFace: "Calibri", valign: "top"
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// right column – historical timeline
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x: 5.3, y: 2.05, w: 4.2, h: 0.38,
fontSize: 15, bold: true, color: C.gold, fontFace: "Calibri"
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const timeline = [
["1884", "Carl Koller — cocaine for ophthalmic nerve block"],
["1899", "Einhorn synthesizes procaine"],
["1940s", "Brachial plexus blocks via paresthesia"],
["1960s", "Peripheral nerve stimulator introduced"],
["1978", "La Grange — first USG nerve block described"],
["2000s", "High-frequency US becomes standard of care"],
["2010+", "Fascial plane blocks era begins"],
];
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s.addText(row[1], {
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}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 4 — LANDMARK / BLIND TECHNIQUE
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.offwhite }, line: { color: C.offwhite }
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addHeader(s, "Landmark / 'Blind' Technique", "The traditional approach to nerve localization");
// Definition box
s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
x: 0.3, y: 1.25, w: 9.4, h: 0.55,
fill: { color: C.blue }, line: { color: C.blue }, rectRadius: 0.07
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s.addText("Definition: Needle placed using surface anatomy, bony landmarks, and tactile feedback — without real-time imaging.", {
x: 0.3, y: 1.25, w: 9.4, h: 0.55,
fontSize: 13, color: C.white, fontFace: "Calibri", bold: false, align: "center", margin: 0
});
// Two columns
// Left — principles
s.addShape(pres.shapes.RECTANGLE, {
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s.addText("PRINCIPLES & METHOD", {
x: 0.3, y: 1.92, w: 4.4, h: 0.38,
fontSize: 13, bold: true, color: C.gold, fontFace: "Calibri", align: "center", margin: 0
});
s.addText(makeBullets([
"Identify bony prominences / vascular pulsations",
"Use surface landmarks to triangulate nerve path",
"Advance needle toward nerve territory",
"Elicit paresthesia = nerve proximity confirmed",
"Inject local anesthetic after negative aspiration",
"No adjunct equipment required",
], { fontSize: 12.5 }), {
x: 0.3, y: 2.33, w: 4.4, h: 2.9, fontFace: "Calibri", valign: "top"
});
// Right — limitations
s.addShape(pres.shapes.RECTANGLE, {
x: 5.3, y: 1.92, w: 4.4, h: 0.38,
fill: { color: "B71C1C" }, line: { color: "B71C1C" }
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s.addText("LIMITATIONS", {
x: 5.3, y: 1.92, w: 4.4, h: 0.38,
fontSize: 13, bold: true, color: C.white, fontFace: "Calibri", align: "center", margin: 0
});
s.addText(makeBullets([
"Relies entirely on operator experience",
"Cannot visualize nerve or needle in real time",
"Higher block failure rate (15–30%)",
"Risk of intraneural injection & nerve injury",
"Risk of inadvertent vascular puncture",
"Anatomical variation undetected",
"Larger local anesthetic volumes needed",
"Not suitable for obese / distorted anatomy",
], { fontSize: 12, bulletColor: "EF5350" }), {
x: 5.3, y: 2.33, w: 4.4, h: 2.9, fontFace: "Calibri", valign: "top"
});
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 5 — PNS: PRINCIPLES & TECHNIQUE
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.offwhite }, line: { color: C.offwhite }
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addHeader(s, "Peripheral Nerve Stimulator (PNS)", "Principles, Equipment & Technique");
// principle box
s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
x: 0.3, y: 1.25, w: 9.4, h: 0.55,
fill: { color: C.teal }, line: { color: C.teal }, rectRadius: 0.07
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s.addText("Principle: Deliver small electrical pulses via an insulated needle tip → depolarize peripheral nerve → elicit motor twitch at low current (≤0.5 mA)", {
x: 0.3, y: 1.25, w: 9.4, h: 0.55,
fontSize: 13, color: C.white, fontFace: "Calibri", align: "center", margin: 0
});
// Left column – equipment
s.addShape(pres.shapes.RECTANGLE, {
x: 0.3, y: 1.9, w: 4.55, h: 0.38,
fill: { color: C.navy }, line: { color: C.navy }
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s.addText("EQUIPMENT & SETUP", {
x: 0.3, y: 1.9, w: 4.55, h: 0.38,
fontSize: 13, bold: true, color: C.gold, fontFace: "Calibri", align: "center", margin: 0
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s.addText(makeBullets([
"Insulated needle (Teflon/polyurethane coated shaft)",
"Cathode (−) → stimulating needle",
"Anode (+) → surface ECG electrode on patient",
"Initial current: 1–1.5 mA, 0.1 ms pulse width, 2 Hz",
"Advance until appropriate motor twitch obtained",
"Reduce current — maintain twitch at ≤0.5 mA",
"Negative aspiration → inject local anesthetic",
], { fontSize: 12.5 }), {
x: 0.3, y: 2.32, w: 4.55, h: 2.95, fontFace: "Calibri", valign: "top"
});
// Right column – key rules
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x: 5.15, y: 1.9, w: 4.55, h: 0.38,
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s.addText("KEY RULES & SAFETY", {
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s.addText(makeBullets([
"Cathodal stimulation 2× more efficient than anodal",
"Anode position on body surface does NOT matter",
"Higher current (>1.5 mA) → stimulates through tissue but more pain",
"Twitch at <0.3 mA = possible intraneural placement — STOP",
"No twitch on injection = ensures extrafascicular position",
"Motor response must be appropriate (distal muscle movement)",
"Painful paresthesia on injection → ABORT immediately",
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}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 6 — PNS ADVANTAGES & LIMITATIONS
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.offwhite }, line: { color: C.offwhite }
});
addHeader(s, "PNS — Advantages & Limitations", "An objective nerve localization step-up from landmark");
const advs = [
"Objective motor response — independent of patient cooperation",
"No paresthesia required → allows heavier sedation",
"Localization accuracy superior to pure landmark technique",
"Useful when US imaging is poor (deep structures, obese patients)",
"Continuous catheter placement guided reliably",
"Dual-monitoring with USG: confirms target nerve identity",
"Medicolegal documentation of needle-nerve distance",
"Widely available even in resource-limited settings",
];
const lims = [
"Requires insulated needles (extra cost)",
"Cannot visualize surrounding structures (vessels, pleura)",
"Muscle contraction obscures fine needle control",
"Motor response absent in neuropathic / denervated nerves",
"False negatives with long-acting neuromuscular blockade",
"Does NOT confirm correct local anesthetic spread",
"Stimulation through fascial planes can mislead",
];
// Green box for advantages
s.addShape(pres.shapes.RECTANGLE, {
x: 0.3, y: 1.22, w: 4.6, h: 0.38,
fill: { color: "2E7D32" }, line: { color: "2E7D32" }
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s.addText("✓ ADVANTAGES", {
x: 0.3, y: 1.22, w: 4.6, h: 0.38,
fontSize: 14, bold: true, color: C.white, fontFace: "Calibri", align: "center", margin: 0
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s.addText(makeBullets(advs, { fontSize: 12, bulletColor: "4CAF50" }), {
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// Red box for limitations
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s.addText("✗ LIMITATIONS", {
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fontSize: 14, bold: true, color: C.white, fontFace: "Calibri", align: "center", margin: 0
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s.addText(makeBullets(lims, { fontSize: 12, bulletColor: "EF5350" }), {
x: 5.1, y: 1.63, w: 4.6, h: 3.7, fontFace: "Calibri", valign: "top"
});
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 7 — USG: PRINCIPLES
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.offwhite }, line: { color: C.offwhite }
});
addHeader(s, "Ultrasound-Guided Nerve Blocks (USG)", "Physical Principles & Technology");
// Left — physics
s.addShape(pres.shapes.RECTANGLE, {
x: 0.3, y: 1.22, w: 4.55, h: 0.38,
fill: { color: C.navy }, line: { color: C.navy }
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s.addText("ULTRASOUND PHYSICS", {
x: 0.3, y: 1.22, w: 4.55, h: 0.38,
fontSize: 13, bold: true, color: C.gold, fontFace: "Calibri", align: "center", margin: 0
});
s.addText(makeBullets([
"Sound waves (1–15 MHz) emitted by piezoelectric crystal transducer",
"Waves reflect at tissue interfaces → received back as echoes",
"High frequency (>10 MHz): better resolution, less penetration",
"Low frequency (<6 MHz): deeper structures, less resolution",
"Peripheral nerves: hyperechoic 'honeycomb' appearance in short axis",
"Nerve bundles = hypoechoic fascicles surrounded by hyperechoic epineurium",
"Real-time B-mode (2D) imaging standard for most blocks",
"Doppler mode: identify adjacent vessels before needle pass",
], { fontSize: 12.5 }), {
x: 0.3, y: 1.63, w: 4.55, h: 3.7, fontFace: "Calibri", valign: "top"
});
// Right — technique
s.addShape(pres.shapes.RECTANGLE, {
x: 5.15, y: 1.22, w: 4.55, h: 0.38,
fill: { color: C.teal }, line: { color: C.teal }
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s.addText("TECHNIQUE APPROACHES", {
x: 5.15, y: 1.22, w: 4.55, h: 0.38,
fontSize: 13, bold: true, color: C.white, fontFace: "Calibri", align: "center", margin: 0
});
s.addText([
...makeBullets(["IN-PLANE TECHNIQUE:"], { fontSize: 12.5, bulletColor: C.gold }),
...makeSubBullets([
"Needle parallel to transducer beam",
"Full needle shaft visible — preferred for deep blocks",
"Best needle visualization & control",
], { fontSize: 11.5 }),
...makeBullets(["OUT-OF-PLANE TECHNIQUE:"], { fontSize: 12.5, bulletColor: C.gold }),
...makeSubBullets([
"Needle perpendicular to beam",
"Only needle tip cross-section visible",
"Useful for superficial, limited-space blocks",
], { fontSize: 11.5 }),
...makeBullets(["KEY PRINCIPLES:"], { fontSize: 12.5, bulletColor: C.gold }),
...makeSubBullets([
"Identify nerve BEFORE needle insertion",
"Track needle tip at ALL times",
"Confirm LA spread as hypoechoic halo around nerve",
"Hydrodissection: inject 1–2 mL to open tissue planes",
], { fontSize: 11.5 }),
], {
x: 5.15, y: 1.63, w: 4.55, h: 3.7, fontFace: "Calibri", valign: "top"
});
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 8 — USG ADVANTAGES (MAIN FOCUS)
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.navy }, line: { color: C.navy }
});
// accent strip
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 0.38, h: 5.625,
fill: { color: C.gold }, line: { color: C.gold }
});
s.addText("Advantages of Ultrasound-Guided Blocks", {
x: 0.6, y: 0.15, w: 9, h: 0.6,
fontSize: 26, bold: true, color: C.white, fontFace: "Calibri", margin: 0
});
s.addText("Why USG has become the gold standard in modern regional anesthesia", {
x: 0.6, y: 0.72, w: 9, h: 0.35,
fontSize: 13, color: C.accent, fontFace: "Calibri", italic: true, margin: 0
});
const advItems = [
{ icon: "▶", title: "Real-Time Visualization", desc: "Direct imaging of nerve, needle tip & surrounding structures simultaneously" },
{ icon: "▶", title: "Higher Success Rate", desc: "Block failure reduced by ~50% vs landmark (meta-analysis evidence)" },
{ icon: "▶", title: "Faster Onset", desc: "More precise LA deposition → shorter time to surgical anesthesia" },
{ icon: "▶", title: "Reduced LA Volume", desc: "Targeted delivery requires 30–50% less local anesthetic" },
{ icon: "▶", title: "Anatomical Variation Detected", desc: "Nerve position variations visible in real time — prevents failure" },
{ icon: "▶", title: "Vascular Safety", desc: "Color Doppler identifies vessels → avoids inadvertent IV injection & hematoma" },
{ icon: "▶", title: "Reduced Systemic Toxicity", desc: "Lower LA volumes + confirmed extravascular injection → less LAST risk" },
{ icon: "▶", title: "Intraneural Injection Prevention", desc: "Real-time spread pattern confirms perineural not intraneural injection" },
];
const perRow = 4;
advItems.forEach((item, i) => {
const col = i % perRow;
const row = Math.floor(i / perRow);
const x = 0.5 + col * 2.35;
const y = 1.18 + row * 2.08;
s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
x, y, w: 2.2, h: 1.85,
fill: { color: C.blue, transparency: 15 },
line: { color: C.teal, pt: 1.5 },
rectRadius: 0.12,
});
s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
x: x + 0.07, y: y + 0.07, w: 0.45, h: 0.38,
fill: { color: C.gold }, line: { color: C.gold }, rectRadius: 0.05
});
s.addText(item.icon, {
x: x + 0.07, y: y + 0.07, w: 0.45, h: 0.38,
fontSize: 14, color: C.navy, fontFace: "Calibri", bold: true, align: "center", margin: 0
});
s.addText(item.title, {
x: x + 0.08, y: y + 0.52, w: 2.06, h: 0.45,
fontSize: 11.5, bold: true, color: C.accent, fontFace: "Calibri", margin: 0
});
s.addText(item.desc, {
x: x + 0.08, y: y + 0.97, w: 2.06, h: 0.8,
fontSize: 10.5, color: C.offwhite, fontFace: "Calibri", margin: 0
});
});
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 5.42, w: 10, h: 0.2,
fill: { color: C.teal }, line: { color: C.teal }
});
s.addText("Regional Anesthesia | From Blind to Brilliant", {
x: 0.3, y: 5.42, w: 9.4, h: 0.2,
fontSize: 8, color: C.navy, fontFace: "Calibri", margin: 0, align: "center", bold: true
});
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 9 — BLOCK SITES: UPPER LIMB
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.offwhite }, line: { color: C.offwhite }
});
addHeader(s, "Block Sites — Upper Limb (Brachial Plexus)", "From roots to terminal branches");
const sites = [
{
name: "Interscalene Block",
level: "C5–C6 (roots/trunks)",
landmark: "Between SCM & anterior scalene",
us: "C5/C6 roots lateral to carotid",
use: "Shoulder & proximal arm surgery",
color: C.navy,
},
{
name: "Supraclavicular Block",
level: "Trunks → divisions",
landmark: "1st rib, subclavian artery pulsation",
us: "Subclavian artery + plexus in short axis",
use: "Entire arm distal to shoulder",
color: C.blue,
},
{
name: "Infraclavicular Block",
level: "Cords of brachial plexus",
landmark: "Inferior to clavicle, medial to coracoid",
us: "Three cords around axillary artery",
use: "Elbow, forearm, hand surgery",
color: C.teal,
},
{
name: "Axillary Block",
level: "Terminal branches",
landmark: "Axillary artery pulse",
us: "Musculocutaneous, median, ulnar, radial",
use: "Forearm & hand; safest approach",
color: C.navy,
},
];
sites.forEach((site, i) => {
const x = 0.3 + (i % 2) * 4.85;
const y = 1.28 + Math.floor(i / 2) * 2.0;
s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
x, y, w: 4.6, h: 1.82,
fill: { color: site.color }, line: { color: site.color }, rectRadius: 0.1
});
s.addText(site.name, {
x: x + 0.12, y: y + 0.1, w: 4.35, h: 0.38,
fontSize: 14, bold: true, color: C.gold, fontFace: "Calibri", margin: 0
});
s.addText([
{ text: "Level: ", options: { bold: true, color: C.accent, fontSize: 11 } },
{ text: site.level + "\n", options: { color: C.white, fontSize: 11 } },
{ text: "Landmark: ", options: { bold: true, color: C.accent, fontSize: 11 } },
{ text: site.landmark + "\n", options: { color: C.white, fontSize: 11 } },
{ text: "USG view: ", options: { bold: true, color: C.accent, fontSize: 11 } },
{ text: site.us + "\n", options: { color: C.white, fontSize: 11 } },
{ text: "Indication: ", options: { bold: true, color: C.gold, fontSize: 11 } },
{ text: site.use, options: { color: C.offwhite, fontSize: 11 } },
], {
x: x + 0.12, y: y + 0.5, w: 4.35, h: 1.25, fontFace: "Calibri", valign: "top", margin: 0
});
});
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 10 — BLOCK SITES: LOWER LIMB & TRUNK
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.offwhite }, line: { color: C.offwhite }
});
addHeader(s, "Block Sites — Lower Limb & Truncal", "Femoral, sciatic, TAP and more");
// Lower limb
s.addShape(pres.shapes.RECTANGLE, {
x: 0.3, y: 1.22, w: 4.55, h: 0.38,
fill: { color: C.navy }, line: { color: C.navy }
});
s.addText("LOWER LIMB BLOCKS", {
x: 0.3, y: 1.22, w: 4.55, h: 0.38,
fontSize: 13, bold: true, color: C.gold, fontFace: "Calibri", align: "center", margin: 0
});
const llBlocks = [
["Femoral nerve block", "Femoral triangle / inguinal ligament", "Hip fracture, TKR, anterior thigh"],
["Adductor canal block", "Adductor canal (mid-thigh)", "TKR — preserves motor (quadriceps-sparing)"],
["Sciatic nerve block", "Posterior hip / popliteal fossa", "Foot, ankle, posterior leg surgery"],
["Popliteal block", "Popliteal fossa (posterior knee)", "Foot & ankle — tibial/peroneal division"],
["Obturator block", "Obturator foramen / canal", "TKR supplementation, hip adductor spasm"],
["FICB (Fascia Iliaca)", "Fascia iliaca compartment", "Hip/femur fracture analgesia"],
];
llBlocks.forEach((row, i) => {
const y = 1.65 + i * 0.57;
s.addShape(pres.shapes.RECTANGLE, {
x: 0.3, y, w: 4.55, h: 0.52,
fill: { color: i % 2 === 0 ? C.lightblue : C.white }, line: { color: "CBD5E0", pt: 0.5 }
});
s.addText(row[0], { x: 0.38, y: y + 0.04, w: 1.8, h: 0.44, fontSize: 10.5, bold: true, color: C.navy, fontFace: "Calibri", margin: 0 });
s.addText(row[1], { x: 2.2, y: y + 0.04, w: 1.5, h: 0.44, fontSize: 9.5, color: C.muted, fontFace: "Calibri", margin: 0 });
s.addText(row[2], { x: 3.72, y: y + 0.04, w: 1.1, h: 0.44, fontSize: 9, color: C.blue, fontFace: "Calibri", margin: 0 });
});
// Truncal
s.addShape(pres.shapes.RECTANGLE, {
x: 5.15, y: 1.22, w: 4.55, h: 0.38,
fill: { color: C.teal }, line: { color: C.teal }
});
s.addText("TRUNCAL & NEURAXIAL BLOCKS", {
x: 5.15, y: 1.22, w: 4.55, h: 0.38,
fontSize: 13, bold: true, color: C.white, fontFace: "Calibri", align: "center", margin: 0
});
s.addText(makeBullets([
"Transversus Abdominis Plane (TAP) — abdominal wall analgesia (T8–L1)",
"Rectus Sheath Block — periumbilical midline analgesia",
"Erector Spinae Plane (ESP) — thoracic/abdominal analgesia via paravertebral spread",
"Paravertebral Block — unilateral thoracic / breast surgery",
"Serratus Anterior Plane Block — rib fractures, thoracic wall",
"PECS I & II — breast surgery, axillary dissection",
"Quadratus Lumborum (QL) — abdominal / hip surgery",
"Intercostal Nerve Blocks — rib fracture, post-thoracotomy pain",
], { fontSize: 11.5, bulletColor: C.gold }), {
x: 5.15, y: 1.63, w: 4.55, h: 3.7, fontFace: "Calibri", valign: "top"
});
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 11 — HEAD & NECK BLOCKS
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.offwhite }, line: { color: C.offwhite }
});
addHeader(s, "Block Sites — Head, Neck & Neuraxial", "Completing the regional anesthesia atlas");
const headBlocks = [
["Cervical Plexus Block", "Superficial & deep", "Carotid endarterectomy, neck dissection, thyroidectomy"],
["Stellate Ganglion Block", "C6–T1 junction", "Sympathetically mediated pain, vasospasm"],
["Greater Occipital Nerve", "Occipital protuberance", "Occipital neuralgia, migraine treatment"],
["Trigeminal branches", "V1/V2/V3 foramina", "Facial pain, dental procedures"],
["Glossopharyngeal Block", "Styloid process", "Awake intubation, oropharyngeal pain"],
["Superior Laryngeal Block", "Thyrohyoid membrane", "Awake intubation, laryngoscopy"],
];
// left table
s.addShape(pres.shapes.RECTANGLE, {
x: 0.3, y: 1.22, w: 5.8, h: 0.38,
fill: { color: C.navy }, line: { color: C.navy }
});
s.addText("HEAD & NECK BLOCKS", {
x: 0.3, y: 1.22, w: 5.8, h: 0.38,
fontSize: 13, bold: true, color: C.gold, fontFace: "Calibri", align: "center", margin: 0
});
headBlocks.forEach((row, i) => {
const y = 1.65 + i * 0.56;
s.addShape(pres.shapes.RECTANGLE, {
x: 0.3, y, w: 5.8, h: 0.5,
fill: { color: i % 2 === 0 ? C.lightblue : C.white }, line: { color: "CBD5E0", pt: 0.5 }
});
s.addText(row[0], { x: 0.38, y: y + 0.04, w: 2.1, h: 0.42, fontSize: 10.5, bold: true, color: C.navy, fontFace: "Calibri", margin: 0 });
s.addText(row[1], { x: 2.5, y: y + 0.04, w: 1.35, h: 0.42, fontSize: 9.5, color: C.muted, fontFace: "Calibri", margin: 0 });
s.addText(row[2], { x: 3.87, y: y + 0.04, w: 2.2, h: 0.42, fontSize: 9.5, color: C.blue, fontFace: "Calibri", margin: 0 });
});
// right — neuraxial + fascial plane
s.addShape(pres.shapes.RECTANGLE, {
x: 6.4, y: 1.22, w: 3.3, h: 0.38,
fill: { color: C.teal }, line: { color: C.teal }
});
s.addText("NEURAXIAL BLOCKS", {
x: 6.4, y: 1.22, w: 3.3, h: 0.38,
fontSize: 13, bold: true, color: C.white, fontFace: "Calibri", align: "center", margin: 0
});
s.addText(makeBullets([
"Spinal (Subarachnoid) Block",
"Epidural (lumbar / thoracic)",
"Caudal Block (pediatric)",
"Combined Spinal-Epidural (CSE)",
"US-guided landmark identification (obese / difficult anatomy)",
"Paramedian approach (degenerative spine)",
], { fontSize: 11.5, bulletColor: C.gold }), {
x: 6.4, y: 1.63, w: 3.3, h: 2.1, fontFace: "Calibri", valign: "top"
});
s.addShape(pres.shapes.RECTANGLE, {
x: 6.4, y: 3.8, w: 3.3, h: 0.38,
fill: { color: C.blue }, line: { color: C.blue }
});
s.addText("FASCIAL PLANE ERA", {
x: 6.4, y: 3.8, w: 3.3, h: 0.38,
fontSize: 13, bold: true, color: C.white, fontFace: "Calibri", align: "center", margin: 0
});
s.addText("Fascial plane blocks target the space between two fasciae rather than individual nerves — only possible with ultrasound guidance. Enabled entirely new block techniques impossible with landmark or PNS methods.", {
x: 6.4, y: 4.2, w: 3.3, h: 1.1,
fontSize: 10.5, color: C.text, fontFace: "Calibri", margin: 0
});
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 12 — HEAD-TO-HEAD COMPARISON
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.offwhite }, line: { color: C.offwhite }
});
addHeader(s, "Head-to-Head Comparison", "Blind vs PNS vs Ultrasound-Guided");
const headers = ["Parameter", "Blind / Landmark", "PNS-Guided", "USG-Guided"];
const rows = [
["Nerve visualization", "None", "Indirect (motor twitch)", "Direct real-time imaging"],
["Block success rate", "70–85%", "85–92%", "92–98%"],
["LA volume required", "High (30–50 mL)","Moderate (20–30 mL)", "Low (10–20 mL)"],
["Onset time", "Long", "Moderate", "Fast"],
["Intraneural risk", "High", "Moderate", "Low (real-time monitoring)"],
["Vascular injury risk", "Moderate", "Moderate", "Low (Doppler)"],
["Anatomical variation", "Undetected", "Undetected", "Identified"],
["Fascial plane blocks", "Not possible", "Not possible", "Enabled"],
["Equipment cost", "Minimal", "Moderate", "Higher"],
["Learning curve", "Short (anatomy)","Moderate", "Moderate-steep (sonoanatomy)"],
["Suitable sedated patients","Limited (paresthesia)", "Yes", "Yes"],
];
const colW = [2.5, 2.1, 2.1, 2.85];
const colX = [0.2, 2.72, 4.83, 6.95];
const colColors = [C.navy, "78909C", C.blue, C.teal];
// Header row
headers.forEach((h, ci) => {
s.addShape(pres.shapes.RECTANGLE, {
x: colX[ci], y: 1.22, w: colW[ci] - 0.04, h: 0.4,
fill: { color: colColors[ci] }, line: { color: colColors[ci] }
});
s.addText(h, {
x: colX[ci], y: 1.22, w: colW[ci] - 0.04, h: 0.4,
fontSize: 11, bold: true, color: C.white, fontFace: "Calibri", align: "center", margin: 0
});
});
rows.forEach((row, ri) => {
const y = 1.64 + ri * 0.36;
const bg = ri % 2 === 0 ? C.lightblue : C.white;
row.forEach((cell, ci) => {
s.addShape(pres.shapes.RECTANGLE, {
x: colX[ci], y, w: colW[ci] - 0.04, h: 0.34,
fill: { color: ci === 0 ? C.offwhite : bg }, line: { color: "CBD5E0", pt: 0.5 }
});
// color USG advantages
let textColor = C.text;
if (ci === 3 && (cell.includes("Low") || cell.includes("Yes") || cell.includes("Fast") || cell.includes("92"))) textColor = "1B5E20";
if (ci === 1 && (cell.includes("High") || cell.includes("Long") || cell.includes("Not"))) textColor = "B71C1C";
s.addText(cell, {
x: colX[ci] + 0.05, y: y + 0.02, w: colW[ci] - 0.14, h: 0.3,
fontSize: 9.5, color: textColor, fontFace: "Calibri", bold: ci === 0, margin: 0
});
});
});
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 13 — USG DETAILED ADVANTAGES (safety focus)
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.offwhite }, line: { color: C.offwhite }
});
addHeader(s, "USG — Detailed Safety & Clinical Advantages", "Evidence-based benefits");
const cats = [
{
title: "EFFICACY ADVANTAGES",
color: C.navy,
items: [
"Higher first-attempt success (meta-analysis: OR 2.79 vs PNS alone)",
"Consistent block performance time regardless of operator experience",
"Identifies nerves with anatomical variation that would cause landmark failure",
"Fascial plane blocks impossible without USG — new era of chest wall & abdominal analgesia",
"Enables catheter placement with real-time visualization of position",
]
},
{
title: "SAFETY ADVANTAGES",
color: "1B5E20",
items: [
"Reduces accidental intravascular injection — vascular structure visible on Doppler",
"Fewer seizures: study showed 0/9238 USG vs 6/5436 landmark (p=0.006)",
"Real-time injection monitoring prevents high-pressure intraneural injection",
"Pneumothorax risk reduction — pleura visible with intercostal & supraclavicular blocks",
"Epidural/paravertebral: identify midline, epidural depth, ligamentum flavum",
]
},
{
title: "VOLUME & PHARMACOLOGIC",
color: C.teal,
items: [
"30–50% reduction in local anesthetic dose required",
"Reduced LA systemic absorption → lower LAST (Local Anesthetic Systemic Toxicity) risk",
"More rapid onset due to precise perineural LA deposition",
"Prolonged block duration: circumferential nerve coverage",
"Hydrodissection technique: 1–2 mL identifies correct tissue plane",
]
},
{
title: "SPECIAL POPULATIONS & CONTEXTS",
color: C.blue,
items: [
"Obese patients: deep nerves located accurately — landmark unreliable",
"Pediatric anesthesia: replacing neuraxial blocks (PRAN study evidence)",
"Anticoagulated patients: vascular avoidance reduces hematoma risk",
"Dual monitoring (US + PNS): confirms nerve identity when image quality poor",
"Medicolegal: real-time imaging documents needle-nerve relationship",
]
},
];
cats.forEach((cat, i) => {
const col = i % 2;
const row = Math.floor(i / 2);
const x = 0.3 + col * 4.85;
const y = 1.22 + row * 2.08;
s.addShape(pres.shapes.RECTANGLE, {
x, y, w: 4.6, h: 0.38,
fill: { color: cat.color }, line: { color: cat.color }
});
s.addText(cat.title, {
x, y, w: 4.6, h: 0.38,
fontSize: 12, bold: true, color: C.white, fontFace: "Calibri", align: "center", margin: 0
});
s.addText(makeBullets(cat.items, { fontSize: 11, bulletColor: cat.color }), {
x: x + 0.05, y: y + 0.4, w: 4.5, h: 1.62, fontFace: "Calibri", valign: "top"
});
});
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 14 — DUAL MONITORING (PNS + USG)
// ═══════════════════════════════════════════════════════════════════════════════
{
const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.offwhite }, line: { color: C.offwhite }
});
addHeader(s, "Dual Monitoring: PNS + Ultrasound", "When 1 + 1 = 3 in regional anesthesia safety");
s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
x: 0.3, y: 1.22, w: 9.4, h: 0.6,
fill: { color: C.gold }, line: { color: C.gold }, rectRadius: 0.07
});
s.addText('"When US + PNS are combined, the electrical twitch provides ADDITIVE safety — confirming nerve identity when imaging is suboptimal, and alerting the operator to inadvertent intraneural contact."', {
x: 0.3, y: 1.22, w: 9.4, h: 0.6,
fontSize: 12.5, color: C.navy, fontFace: "Calibri", italic: true, align: "center", margin: 4
});
// Three columns
const cols3 = [
{
title: "When USG is Primary",
color: C.teal,
items: [
"Routine nerve blocks with good image quality",
"Superficial nerves (axillary, femoral, popliteal)",
"Fascial plane blocks (TAP, ESP, PECS)",
"PNS role: SAFETY BACKUP only",
"Twitch at <0.5 mA = too close to nerve",
]
},
{
title: "When PNS is Primary",
color: C.blue,
items: [
"US image quality poor (obesity, deep nerves)",
"Operator less experienced with sonoanatomy",
"Confirmed motor response guides needle",
"USG role: BACKUP — watch for vessels",
"PNS still valid standalone in absence of USG",
]
},
{
title: "True Dual Monitoring",
color: C.navy,
items: [
"Both used simultaneously from start",
"US identifies nerve; PNS confirms identity",
"Unexpected twitch → stop advancing needle",
"Best medicolegal documentation",
"Recommended for training and high-risk blocks",
]
},
];
cols3.forEach((col, i) => {
const x = 0.3 + i * 3.15;
s.addShape(pres.shapes.RECTANGLE, {
x, y: 1.95, w: 3.1, h: 0.38,
fill: { color: col.color }, line: { color: col.color }
});
s.addText(col.title, {
x, y: 1.95, w: 3.1, h: 0.38,
fontSize: 12, bold: true, color: C.white, fontFace: "Calibri", align: "center", margin: 0
});
s.addText(makeBullets(col.items, { fontSize: 11.5, bulletColor: col.color }), {
x: x + 0.05, y: 2.36, w: 3.0, h: 2.95, fontFace: "Calibri", valign: "top"
});
});
}
// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 15 — LEARNING CURVE & TRAINING
// ═══════════════════════════════════════════════════════════════════════════════
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const s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, {
x: 0, y: 0, w: 10, h: 5.625,
fill: { color: C.offwhite }, line: { color: C.offwhite }
});
addHeader(s, "Training, Learning Curve & Competency", "Acquiring USG regional anesthesia skills");
s.addShape(pres.shapes.RECTANGLE, {
x: 0.3, y: 1.22, w: 4.55, h: 0.38,
fill: { color: C.navy }, line: { color: C.navy }
});
s.addText("SKILL ACQUISITION PATHWAY", {
x: 0.3, y: 1.22, w: 4.55, h: 0.38,
fontSize: 13, bold: true, color: C.gold, fontFace: "Calibri", align: "center", margin: 0
});
const steps = [
["Phase 1", "SCAN FIRST", "Learn probe handling, identify target nerve & adjacent structures without needle"],
["Phase 2", "LANDMARK + USG", "Use surface landmarks to approximate, then confirm with ultrasound"],
["Phase 3", "USG + PNS", "Ultrasound primary + nerve stimulator for confirmation"],
["Phase 4", "PURE USG", "Ultrasound-only for routine blocks once competence achieved"],
];
steps.forEach((step, i) => {
const y = 1.66 + i * 0.88;
s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
x: 0.3, y, w: 0.85, h: 0.72,
fill: { color: C.teal }, line: { color: C.teal }, rectRadius: 0.08
});
s.addText(step[0], { x: 0.3, y: y + 0.04, w: 0.85, h: 0.3, fontSize: 9, bold: true, color: C.white, fontFace: "Calibri", align: "center", margin: 0 });
s.addText(step[1], { x: 0.3, y: y + 0.35, w: 0.85, h: 0.3, fontSize: 8, color: C.gold, fontFace: "Calibri", align: "center", margin: 0 });
s.addText(step[2], { x: 1.25, y: y + 0.16, w: 3.5, h: 0.4, fontSize: 11.5, color: C.text, fontFace: "Calibri", margin: 0 });
if (i < 3) {
s.addText("↓", { x: 0.55, y: y + 0.73, w: 0.35, h: 0.18, fontSize: 12, color: C.teal, fontFace: "Calibri", align: "center", margin: 0 });
}
});
s.addShape(pres.shapes.RECTANGLE, {
x: 5.15, y: 1.22, w: 4.55, h: 0.38,
fill: { color: C.teal }, line: { color: C.teal }
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s.addText("SONOANATOMY ESSENTIALS", {
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"Arteries: pulsatile, anechoic, compressible on probe pressure",
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"Muscle: hypoechoic with hyperechoic pennation lines",
"Fascia: bright hyperechoic linear structures",
"Bone: hyperechoic with strong acoustic shadow",
"Tendons: hyperechoic fibrillar pattern — confused with nerves!",
"LA spread: expanding anechoic/hypoechoic halo around nerve",
"Minimum 50 supervised scans before independent practice (ASRA guideline)",
"Simulation training accelerates skill acquisition significantly",
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// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 16 — COMPLICATIONS & SAFETY
// ═══════════════════════════════════════════════════════════════════════════════
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"Infection / abscess (rare)",
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"Benzodiazepine for seizures (NOT propofol)",
"LIPID EMULSION: 20% Intralipid",
" Bolus: 1.5 mL/kg IBW over 1 min",
" Infusion: 0.25 mL/kg/min for 30–60 min",
"CPR if cardiac arrest — lipid emulsion improves ROSC",
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"Short-axis view: cannot see full needle shaft — know limitations",
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// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 17 — CONCLUSION / SUMMARY
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const takeaways = [
["01", "Regional anesthesia evolved from blind paresthesia-seeking → landmark → PNS → ultrasound guidance"],
["02", "Landmark technique remains the foundation — anatomy knowledge is non-negotiable"],
["03", "PNS adds objectivity: motor twitch confirms nerve proximity without paresthesia"],
["04", "Ultrasound provides real-time visualization — higher success, lower LA volumes, fewer complications"],
["05", "USG-only fascial plane blocks represent a paradigm shift — entirely new block anatomies now accessible"],
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// ─── WRITE FILE ───────────────────────────────────────────────────────────────
pres.writeFile({ fileName: "/home/daytona/workspace/nerve-blocks-pptx/Blind_to_Brilliant_Nerve_Blocks.pptx" })
.then(() => console.log("✅ Presentation saved successfully."))
.catch(err => console.error("❌ Error:", err));
Running Command
cd /home/daytona/workspace/nerve-blocks-pptx && node create_pptx.js 2>&1
Running Command
ls -lh /home/daytona/workspace/nerve-blocks-pptx/
Your presentation is ready! Here is the download link:
Blind to Brilliant Nerve Blocks
Presentation · PPTX
What's Inside (17 Slides)
The presentation uses a professional Navy / Teal / Gold theme with structured layouts throughout. Here's a breakdown:
| Slide | Content |
|---|---|
| 1 | Title slide with decorative wave/sonogram graphic |
| 2 | Overview/Agenda — 6 topic cards |
| 3 | Introduction — Why nerve blocks? + Historical timeline (1884–2010+) |
| 4 | Landmark/Blind Technique — principles, method, and limitations |
| 5 | PNS — Equipment, setup, cathode/anode rules, current thresholds |
| 6 | PNS — Advantages vs Limitations (green/red columns) |
| 7 | USG — Ultrasound physics + In-plane vs Out-of-plane techniques |
| 8 | USG Advantages (8 card grid — efficacy, safety, volume, anatomy) |
| 9 | Block Sites — Upper Limb: interscalene, supraclavicular, infraclavicular, axillary |
| 10 | Block Sites — Lower Limb (femoral, sciatic, adductor canal, FICB, etc.) + Truncal (TAP, ESP, PECS, QL) |
| 11 | Block Sites — Head/Neck + Neuraxial + Fascial Plane Era |
| 12 | Head-to-Head Comparison Table — Blind vs PNS vs USG across 11 parameters |
| 13 | USG Detailed Advantages — efficacy, safety, pharmacology, special populations |
| 14 | Dual Monitoring (PNS + USG) — when to combine and how |
| 15 | Training & Learning Curve — 4-phase skill acquisition pathway + sonoanatomy essentials |
| 16 | Complications & Safety — LAST management protocol included |
| 17 | Key Takeaways — 7 summary points on dark background |
Content is sourced from Miller's Anesthesia (10th ed.), NYSORA guidelines, and current meta-analysis evidence (including reduced seizure rates and block failure data with USG guidance).
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