Is physics necessary to become a medical doctor?

Kesha Megharaj MRCS
2 min readJul 1, 2020

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I was under this misapprehension too.

The reality being physics is everywhere!

Although pure physics in its actual form taught in +2 / Intermediate is not directly applicable to studying human biology, there is good deal of physics in understanding human physiology.

  1. Fluid dynamics in cardiovascular system,
  2. electrical conduction in ECG, electrophysiology labs,
  3. optics in visual system and further in ophthalmology,
  4. sound wave related issues in audiology / audiometry,
  5. muscle contraction and neurophysiology deal good amount with potential differences / electricity issues.
  6. Parallel and series circuits in pulmonary / systemic circulation
  7. Similar application in long / short distance association fibres in brain.
  8. Metabolism, heat sink, engine efficiency with ATP generation and distribution.
  9. Feedback and feedforward loops for homeostasis / endocrine systems and neuron circuits.
  10. Issues on resistance, conductance for study of airflow in respiratory system.
  11. Clinical application in CT scan for checking hounsfield units based on stopping power of each tissue medium for X rays.
  12. Electromagnetic principles as applied to MRI as spin of atoms is realigned by magnetic fields, relaxation being registered as images for each pixel.
  13. Lasers of different fancy types for Urology, Ophthalmology, General Surgery with safety precautions at each level.
  14. Ergonomics of laparoscopic surgery in terms of fulcrum point for each port to obtain best effort with minimal energy. (Depth of port placement and instrument use)
  15. Area of cooling based on body surface area with its role in cardiac index, burns treatment, hyperthermia etc. (Heat loss or gain correlates to surface area roughly)
  16. Radioisotope compounds for use in bone scans based on technetium that we use in oncology and neurosurgery on a routine basis.

I really can’t imagine medicine and surgery without physics and its language of study, mathematics.

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Kesha Megharaj MRCS
Kesha Megharaj MRCS

Written by Kesha Megharaj MRCS

Trainee Neurosurgeon 🧠 Global citizen 🌏

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