Create a poster on hd machine mechanism and working
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hemodialysis machine mechanism working principle components
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hemodialysis machine dialyzer circuit diagram
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Running Command
mkdir -p /home/daytona/workspace/hd-poster && ls /home/daytona/workspace/hd-poster/
Writing File
~/hd-poster/create_poster.js
const pptxgen = require("pptxgenjs");
const { execSync } = require("child_process");
// Fetch the Harrison's HD diagram image
const imageUrl = "https://cdn.orris.care/cdss_images/HARRISON_1763034105306_49f4fe97-5014-4506-a5ee-4fa1ce331770.png";
const images = JSON.parse(execSync(
`node /home/daytona/skills/shared/scripts/fetch_images.js "${imageUrl}"`
).toString());
const hdDiagram = images[0].base64;
const pres = new pptxgen();
pres.layout = "LAYOUT_WIDE"; // 13.3" × 7.5" for poster-style
// ─── COLOR PALETTE ───────────────────────────────────────────────────────────
const C = {
deepBlue: "0A1628", // dominant dark background
midBlue: "0D2E5E", // card backgrounds
accentBlue: "1B6CA8", // section headers
teal: "00B4D8", // accent lines / highlights
red: "E63946", // blood circuit accent
green: "2DC653", // dialysate accent
white: "FFFFFF",
offWhite: "E8F4FD",
lightGray: "B0C4DE",
yellow: "FFD700",
};
// ─── SLIDE (POSTER) ──────────────────────────────────────────────────────────
const slide = pres.addSlide();
// Background
slide.addShape(pres.ShapeType.rect, {
x: 0, y: 0, w: 13.3, h: 7.5,
fill: { color: C.deepBlue },
line: { type: "none" },
});
// ── TOP BANNER ───────────────────────────────────────────────────────────────
slide.addShape(pres.ShapeType.rect, {
x: 0, y: 0, w: 13.3, h: 0.85,
fill: { color: C.accentBlue },
line: { type: "none" },
});
// Teal accent bar under banner
slide.addShape(pres.ShapeType.rect, {
x: 0, y: 0.85, w: 13.3, h: 0.06,
fill: { color: C.teal },
line: { type: "none" },
});
// Main Title
slide.addText("HEMODIALYSIS (HD) MACHINE", {
x: 0.3, y: 0.07, w: 9.5, h: 0.65,
fontSize: 30, bold: true, color: C.white,
fontFace: "Calibri", align: "left", valign: "middle", margin: 0,
charSpacing: 3,
});
// Subtitle badge
slide.addShape(pres.ShapeType.roundRect, {
x: 9.9, y: 0.12, w: 3.1, h: 0.55,
fill: { color: C.teal },
line: { type: "none" },
rectRadius: 0.1,
});
slide.addText("MECHANISM & WORKING", {
x: 9.9, y: 0.12, w: 3.1, h: 0.55,
fontSize: 11, bold: true, color: C.deepBlue,
fontFace: "Calibri", align: "center", valign: "middle", margin: 0,
});
// ── COLUMN LAYOUT ─────────────────────────────────────────────────────────────
// Col 1: x=0.18 w=3.6
// Col 2 (image): x=4.05 w=5.0
// Col 3: x=9.25 w=3.85
const colY = 1.08; // start Y for content
// ╔═══════════════════════════════════════╗
// ║ LEFT COLUMN ║
// ╚═══════════════════════════════════════╝
// --- WHAT IS HD? ---
slide.addShape(pres.ShapeType.roundRect, {
x: 0.18, y: colY, w: 3.6, h: 1.0,
fill: { color: C.midBlue },
line: { color: C.teal, pt: 1.5 },
rectRadius: 0.12,
});
slide.addText("🔬 WHAT IS HEMODIALYSIS?", {
x: 0.28, y: colY + 0.04, w: 3.4, h: 0.32,
fontSize: 10.5, bold: true, color: C.teal,
fontFace: "Calibri", align: "left", valign: "middle", margin: 0,
});
slide.addText(
"Hemodialysis substitutes a synthetic filter (dialyzer) for the failed glomerulus. " +
"Blood is continuously cleansed of uremic toxins, excess fluid, and electrolytes outside " +
"the body — typically 3 sessions/week, 3–4 hours each.",
{
x: 0.28, y: colY + 0.34, w: 3.4, h: 0.6,
fontSize: 8.5, color: C.offWhite,
fontFace: "Calibri", align: "left", valign: "top", margin: 0,
}
);
// --- BLOOD CIRCUIT ---
const bY = colY + 1.14;
slide.addShape(pres.ShapeType.roundRect, {
x: 0.18, y: bY, w: 3.6, h: 1.68,
fill: { color: C.midBlue },
line: { color: C.red, pt: 1.5 },
rectRadius: 0.12,
});
// Red accent bar on left edge
slide.addShape(pres.ShapeType.rect, {
x: 0.18, y: bY + 0.02, w: 0.06, h: 1.64,
fill: { color: C.red },
line: { type: "none" },
});
slide.addText("🩸 BLOOD (EXTRACORPOREAL) CIRCUIT", {
x: 0.32, y: bY + 0.07, w: 3.3, h: 0.28,
fontSize: 10, bold: true, color: C.red,
fontFace: "Calibri", align: "left", valign: "middle", margin: 0,
});
slide.addText([
{ text: "Arterial line: ", options: { bold: true, color: C.lightGray } },
{ text: "Blood drawn via vascular access (AVF/graft/catheter)\n", options: { color: C.offWhite } },
{ text: "Blood pump: ", options: { bold: true, color: C.lightGray } },
{ text: "Roller pump drives blood at 300–500 mL/min\n", options: { color: C.offWhite } },
{ text: "Dialyzer: ", options: { bold: true, color: C.lightGray } },
{ text: "Hollow-fiber semipermeable membrane (filter)\n", options: { color: C.offWhite } },
{ text: "Heparin pump: ", options: { bold: true, color: C.lightGray } },
{ text: "Anticoagulation prevents clotting in circuit\n", options: { color: C.offWhite } },
{ text: "Air trap/detector: ", options: { bold: true, color: C.lightGray } },
{ text: "Venous chamber traps air bubbles before return", options: { color: C.offWhite } },
], {
x: 0.32, y: bY + 0.36, w: 3.3, h: 1.24,
fontSize: 8, fontFace: "Calibri",
align: "left", valign: "top", margin: 0,
});
// --- DIALYSIS PRINCIPLES ---
const pY = bY + 1.82;
slide.addShape(pres.ShapeType.roundRect, {
x: 0.18, y: pY, w: 3.6, h: 1.72,
fill: { color: C.midBlue },
line: { color: C.yellow, pt: 1.5 },
rectRadius: 0.12,
});
slide.addShape(pres.ShapeType.rect, {
x: 0.18, y: pY + 0.02, w: 0.06, h: 1.68,
fill: { color: C.yellow },
line: { type: "none" },
});
slide.addText("⚡ PRINCIPLES OF SOLUTE REMOVAL", {
x: 0.32, y: pY + 0.07, w: 3.3, h: 0.28,
fontSize: 10, bold: true, color: C.yellow,
fontFace: "Calibri", align: "left", valign: "middle", margin: 0,
});
slide.addText([
{ text: "DIFFUSION\n", options: { bold: true, color: C.yellow } },
{ text: "Small solutes (urea, creatinine, K⁺) move down concentration gradient across membrane.\n\n", options: { color: C.offWhite } },
{ text: "ULTRAFILTRATION\n", options: { bold: true, color: C.yellow } },
{ text: "Hydrostatic pressure drives fluid removal (controls edema).\n\n", options: { color: C.offWhite } },
{ text: "CONVECTION\n", options: { bold: true, color: C.yellow } },
{ text: "Solutes dragged with fluid flow ('solute drag') — important in high-flux dialysis.", options: { color: C.offWhite } },
], {
x: 0.32, y: pY + 0.36, w: 3.3, h: 1.28,
fontSize: 8, fontFace: "Calibri",
align: "left", valign: "top", margin: 0,
});
// ╔═══════════════════════════════════════╗
// ║ CENTER: DIAGRAM ║
// ╚═══════════════════════════════════════╝
// Image container background
slide.addShape(pres.ShapeType.roundRect, {
x: 4.02, y: colY, w: 5.06, h: 3.4,
fill: { color: "FFFFFF" },
line: { color: C.teal, pt: 2 },
rectRadius: 0.15,
});
slide.addImage({
data: hdDiagram,
x: 4.1, y: colY + 0.08, w: 4.9, h: 3.22,
sizing: { type: "contain", w: 4.9, h: 3.22 },
});
slide.addText("Fig. Harrison's Principles of Internal Medicine – HD Schema", {
x: 4.02, y: colY + 3.28, w: 5.06, h: 0.22,
fontSize: 7, italic: true, color: C.lightGray,
fontFace: "Calibri", align: "center", valign: "middle", margin: 0,
});
// --- STEP-BY-STEP FLOW below diagram ---
const stepY = colY + 3.58;
slide.addShape(pres.ShapeType.roundRect, {
x: 4.02, y: stepY, w: 5.06, h: 2.5,
fill: { color: C.midBlue },
line: { color: C.accentBlue, pt: 1.2 },
rectRadius: 0.12,
});
slide.addText("📋 STEP-BY-STEP WORKING", {
x: 4.15, y: stepY + 0.06, w: 4.8, h: 0.28,
fontSize: 10.5, bold: true, color: C.teal,
fontFace: "Calibri", align: "left", valign: "middle", margin: 0,
});
const steps = [
["①", "Patient connected via vascular access (AVF / graft / catheter)"],
["②", "Blood pump draws blood at 300–500 mL/min into arterial line"],
["③", "Blood flows through hollow-fiber dialyzer (artificial kidney)"],
["④", "Dialysate flows counter-current at 500–800 mL/min on opposite side"],
["⑤", "Waste (urea, creatinine, K⁺, phosphate) diffuse across membrane"],
["⑥", "Excess fluid removed by controlled ultrafiltration pressure"],
["⑦", "Cleaned blood returns via venous line through air detector"],
["⑧", "Monitors alarm for pressure changes, blood leaks, air embolism"],
];
const stX = 4.15, stW = 4.8;
steps.forEach((s, i) => {
const sy = stepY + 0.38 + i * 0.255;
slide.addText([
{ text: s[0] + " ", options: { bold: true, color: C.teal } },
{ text: s[1], options: { color: C.offWhite } },
], {
x: stX, y: sy, w: stW, h: 0.24,
fontSize: 8, fontFace: "Calibri",
align: "left", valign: "middle", margin: 0,
});
});
// ╔═══════════════════════════════════════╗
// ║ RIGHT COLUMN ║
// ╚═══════════════════════════════════════╝
const rX = 9.28;
// --- DIALYSATE CIRCUIT ---
slide.addShape(pres.ShapeType.roundRect, {
x: rX, y: colY, w: 3.85, h: 1.72,
fill: { color: C.midBlue },
line: { color: C.green, pt: 1.5 },
rectRadius: 0.12,
});
slide.addShape(pres.ShapeType.rect, {
x: rX, y: colY + 0.02, w: 0.06, h: 1.68,
fill: { color: C.green },
line: { type: "none" },
});
slide.addText("💧 DIALYSATE CIRCUIT", {
x: rX + 0.14, y: colY + 0.07, w: 3.6, h: 0.28,
fontSize: 10.5, bold: true, color: C.green,
fontFace: "Calibri", align: "left", valign: "middle", margin: 0,
});
slide.addText([
{ text: "Water treatment: ", options: { bold: true, color: C.lightGray } },
{ text: "Deionization + reverse osmosis\n", options: { color: C.offWhite } },
{ text: "Acid concentrate: ", options: { bold: true, color: C.lightGray } },
{ text: "Na⁺, K⁺, Ca²⁺, Mg²⁺, Cl⁻, acetate\n", options: { color: C.offWhite } },
{ text: "Bicarbonate: ", options: { bold: true, color: C.lightGray } },
{ text: "NaHCO₃/NaCl corrects acidosis\n", options: { color: C.offWhite } },
{ text: "Flow direction: ", options: { bold: true, color: C.lightGray } },
{ text: "Counter-current to blood (maximises gradient)\n", options: { color: C.offWhite } },
{ text: "Flow rate: ", options: { bold: true, color: C.lightGray } },
{ text: "500–800 mL/min; used dialysate drained away", options: { color: C.offWhite } },
], {
x: rX + 0.14, y: colY + 0.38, w: 3.6, h: 1.26,
fontSize: 8, fontFace: "Calibri",
align: "left", valign: "top", margin: 0,
});
// --- DIALYZER (ARTIFICIAL KIDNEY) ---
const dY = colY + 1.86;
slide.addShape(pres.ShapeType.roundRect, {
x: rX, y: dY, w: 3.85, h: 1.72,
fill: { color: C.midBlue },
line: { color: C.teal, pt: 1.5 },
rectRadius: 0.12,
});
slide.addShape(pres.ShapeType.rect, {
x: rX, y: dY + 0.02, w: 0.06, h: 1.68,
fill: { color: C.teal },
line: { type: "none" },
});
slide.addText("🫘 THE DIALYZER (ARTIFICIAL KIDNEY)", {
x: rX + 0.14, y: dY + 0.07, w: 3.6, h: 0.28,
fontSize: 10, bold: true, color: C.teal,
fontFace: "Calibri", align: "left", valign: "middle", margin: 0,
});
slide.addText([
{ text: "Structure: ", options: { bold: true, color: C.lightGray } },
{ text: "Thousands of hollow polysulfone/polyamide fibers\n", options: { color: C.offWhite } },
{ text: "Surface area: ", options: { bold: true, color: C.lightGray } },
{ text: "0.8–2.1 m² of semipermeable membrane\n", options: { color: C.offWhite } },
{ text: "Pore size: ", options: { bold: true, color: C.lightGray } },
{ text: "Allows passage of small solutes; blocks proteins & blood cells\n", options: { color: C.offWhite } },
{ text: "High-flux: ", options: { bold: true, color: C.lightGray } },
{ text: "Larger pores remove middle molecules (β₂-microglobulin)\n", options: { color: C.offWhite } },
{ text: "Configuration: ", options: { bold: true, color: C.lightGray } },
{ text: "Blood inside fibers; dialysate outside — maximises exchange", options: { color: C.offWhite } },
], {
x: rX + 0.14, y: dY + 0.38, w: 3.6, h: 1.26,
fontSize: 8, fontFace: "Calibri",
align: "left", valign: "top", margin: 0,
});
// --- MONITORING & SAFETY ---
const mY = dY + 1.86;
slide.addShape(pres.ShapeType.roundRect, {
x: rX, y: mY, w: 3.85, h: 1.84,
fill: { color: C.midBlue },
line: { color: C.yellow, pt: 1.5 },
rectRadius: 0.12,
});
slide.addShape(pres.ShapeType.rect, {
x: rX, y: mY + 0.02, w: 0.06, h: 1.8,
fill: { color: C.yellow },
line: { type: "none" },
});
slide.addText("🛡️ MONITORING & SAFETY SYSTEMS", {
x: rX + 0.14, y: mY + 0.07, w: 3.6, h: 0.28,
fontSize: 10, bold: true, color: C.yellow,
fontFace: "Calibri", align: "left", valign: "middle", margin: 0,
});
slide.addText([
{ text: "Arterial & venous pressure: ", options: { bold: true, color: C.lightGray } },
{ text: "Detects access failure or clotting\n", options: { color: C.offWhite } },
{ text: "Blood flow rate: ", options: { bold: true, color: C.lightGray } },
{ text: "Measured continuously via roller pump\n", options: { color: C.offWhite } },
{ text: "Air (embolism) detector: ", options: { bold: true, color: C.lightGray } },
{ text: "Ultrasonic — stops pump if air detected\n", options: { color: C.offWhite } },
{ text: "Blood leak detector: ", options: { bold: true, color: C.lightGray } },
{ text: "Optical sensor on dialysate outflow\n", options: { color: C.offWhite } },
{ text: "Conductivity monitor: ", options: { bold: true, color: C.lightGray } },
{ text: "Ensures correct dialysate composition\n", options: { color: C.offWhite } },
{ text: "Temperature: ", options: { bold: true, color: C.lightGray } },
{ text: "Maintained at 35–37 °C; deviations trigger alarms", options: { color: C.offWhite } },
], {
x: rX + 0.14, y: mY + 0.38, w: 3.6, h: 1.38,
fontSize: 8, fontFace: "Calibri",
align: "left", valign: "top", margin: 0,
});
// ── BOTTOM FOOTER ────────────────────────────────────────────────────────────
slide.addShape(pres.ShapeType.rect, {
x: 0, y: 7.28, w: 13.3, h: 0.04,
fill: { color: C.teal },
line: { type: "none" },
});
slide.addShape(pres.ShapeType.rect, {
x: 0, y: 7.32, w: 13.3, h: 0.18,
fill: { color: C.midBlue },
line: { type: "none" },
});
slide.addText(
"Sources: Harrison's Principles of Internal Medicine 21e | Brenner & Rector's The Kidney | Tintinalli's Emergency Medicine | Campbell-Walsh-Wein Urology",
{
x: 0.2, y: 7.31, w: 13.0, h: 0.18,
fontSize: 6.5, italic: true, color: C.lightGray,
fontFace: "Calibri", align: "center", valign: "middle", margin: 0,
}
);
// ── VASCULAR ACCESS KEY BOX (below blood circuit title area) ─────────────────
// Already well-covered in step-by-step; add a quick dialysis dose tag
slide.addShape(pres.ShapeType.roundRect, {
x: 0.18, y: 6.5, w: 3.6, h: 0.65,
fill: { color: "0D2E5E" },
line: { color: C.accentBlue, pt: 1 },
rectRadius: 0.1,
});
slide.addText([
{ text: "Dialysis Dose: ", options: { bold: true, color: C.teal } },
{ text: "Kt/V ≥ 1.2 per session (urea kinetic modelling)\n", options: { color: C.offWhite } },
{ text: "Access types: ", options: { bold: true, color: C.teal } },
{ text: "AVF (preferred) • AVG • Tunnelled CVC", options: { color: C.offWhite } },
], {
x: 0.28, y: 6.5, w: 3.4, h: 0.65,
fontSize: 8, fontFace: "Calibri",
align: "left", valign: "middle", margin: 0,
});
pres.writeFile({ fileName: "/home/daytona/workspace/hd-poster/HD_Machine_Mechanism_Poster.pptx" });
console.log("Poster created successfully!");
Running Command
cd /home/daytona/workspace/hd-poster && node create_poster.js 2>&1
Running Command
ls -lh /home/daytona/workspace/hd-poster/
The poster is ready! Here's your download link:
HD Machine Mechanism Poster
Presentation · PPTX
What's on the poster
A single wide-format poster (13.3" × 7.5") with a deep navy/blue theme, color-coded by circuit, covering:
| Section | Color | Content |
|---|---|---|
| What is HD? | Teal | Definition, indication, session frequency |
| Blood (Extracorporeal) Circuit | Red | Arterial line, roller pump, dialyzer, heparin pump, venous air trap |
| Dialysis Principles | Gold | Diffusion, Ultrafiltration, Convection |
| Center Diagram | — | Harrison's official HD schema (hollow-fiber dialyzer, blood/dialysate circuits, delivery system) |
| Step-by-Step Working | Teal | 8-step numbered workflow from access to return |
| Dialysate Circuit | Green | Water treatment, acid concentrate, bicarbonate, counter-current flow |
| Dialyzer (Artificial Kidney) | Teal | Hollow fiber structure, surface area, pore size, high-flux |
| Monitoring & Safety | Gold | Pressure, blood flow, air detector, blood leak, conductivity, temperature alarms |
| Dialysis Dose & Access | Blue | Kt/V ≥ 1.2, AVF / AVG / CVC access types |
Sources: Harrison's 21e, Brenner & Rector's The Kidney, Tintinalli's Emergency Medicine, Campbell-Walsh-Wein Urology.
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