[Verse 1] Boyle says pressure times volume stays the same Charles adds temperature to the gas law game Dalton's law — each partial pressure stands alone Henry's law — dissolved gas follows tension home Poiseuille says flow goes with radius to the fourth Double the tube, sixteen times the worth Viscosity drags it, length takes its toll Resistance governs every molecule's role [Chorus] Las leyes del gas, they never bend Flujo laminar or turbulent end Reynolds number tells you which way it breaks Critical velocity, everything's at stake Bernoulli speeds the flow, pressure drops below Venturi pulls the oxygen, watch the entrainment go La física no miente — physics doesn't lie Learn the laws or watch your patient's numbers fly [Verse 2] Laminar flow is orderly, parabolic and clean Turbulent flow is chaotic, loud, and mean Reynolds number under two thousand, smooth and steady Climb past four thousand — turbulence is ready Between them sits the critical velocity zone Kinematic viscosity, density, diameter — never alone Ohm's law: voltage over resistance equals current through Electrical safety — what you don't know can hurt you [Chorus] Las leyes del gas, they never bend Flujo laminar or turbulent end Reynolds number tells you which way it breaks Critical velocity, everything's at stake Bernoulli speeds the flow, pressure drops below Venturi pulls the oxygen, watch the entrainment go La física no miente — physics doesn't lie Learn the laws or watch your patient's numbers fly [Verse 3] Laplace says tension equals pressure times the radius Small alveoli collapse — that's the hazard Surfactant cuts the tension, keeps the small ones round Without it, atelectasis drags the patient down Macroshock needs milliamps to stop a heart cold Microshock through a catheter — microamps is all it takes to fold Isolated power systems break the earth connection Line isolation monitors — your electrical protection [Bridge] El fuego en el quirófano — three things ignite Fuel and oxidizer, an ignition source takes flight Laser strikes the ETT, oxygen-rich and bare Saline-filled cuffs and foil-wrapped tubes — take care MRI pulls ferromagnetic objects without warning Zone four means implants screened every single morning Pacemakers feel EMI, diathermy scrambles their beat Bipolar cautery near the generator — keep it discreet [Verse 4] Pressure transducers — level them at the phlebostatic point Zero them to atmosphere or your readings will disappoint Resonance inflates the waveform, damping flattens it out Optimal damping coefficient — point six four, without a doubt Heat and humidity — the airway needs both to survive Hygroscopic heat exchangers keep inspired gas alive Active humidifiers add water vapor, temperature-controlled The nose is a heat exchanger — bypass it, and the story's cold
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