Home
list_alt All Notes
Surgical Diathermy Machine
How a surgical diathermy machine works: the high frequency current used to cut and to coagulate, monopolar and bipolar action, the waveform and power control, the return electrode, and the hazards of misuse in theatre.
Operation Theatre Table
The operation theatre table: the types and their movements, the hydraulic and electromechanical drive, the accessories and attachments, the positioning of the patient for different procedures, the radiolucent tops, and the maintenance and safety checks.
Engineering Mathematics Solved Questions
Revision questions with answers for engineering mathematics: determinants and matrices, gradient and divergence, complex numbers, De Moivre and binomial expansions, partial fractions, Laplace transforms, series expansion and differential equations, in the section A and section B format used in the exam.
Sensors and Blood Flowmeters
Chapter on the sensors and flowmeters used in medicine: temperature, pressure and flow sensors, the electromagnetic, ultrasonic and thermal dilution methods of measuring blood flow, the catheters and probes involved, and the errors to watch for.
Thermodynamics Course Notes
Handwritten thermodynamics course notes and outline for the medical engineering plant unit: definitions and working substance, pure substances and phases, the thermodynamic cycles, internal energy, enthalpy and entropy, calorimetry, the laws of thermodynamics and the applied equations with worked examples.
Theatre Department Supplies
The essential supplies and equipment a theatre department keeps: the categories of consumable, the instruments and their care, the stock levels held, and how supplies are checked and restocked between lists.
Operating Theatre Room
The operating theatre as a department: the surgical suite and its zones, the traffic and clean and dirty routes, the airflow and filtration, the finishes and services, and the equipment that makes up the theatre complex.
Transducers
Transducers for medical instrumentation: the classification into active and passive, analog and digital, resistive, capacitive, inductive, piezoelectric and strain gauge types, with the characteristics of sensitivity, range, linearity and hysteresis that decide which one a device uses.
Electrosurgical Unit
Notes on the electrosurgical unit, or surgical diathermy machine: the principles of operation, monopolar and bipolar modes, the accessories and return electrode, power settings for cutting and coagulation, and the safety checks a biomedical technician performs before the machine goes back to theatre.
Infrared Temperature Sensors
Medical engineering notes on temperature measurement: contact sensors such as thermocouples, RTDs and thermistors, and non-contact infrared detectors, with the emissivity problems, the response times and the clinical instruments each type is used in.
Fibre Optic Temperature Sensors
Fibre optic temperature sensing for medical equipment: how an optical fibre sensor works, the intensity, interferometric and Bragg grating approaches, why they are used where electrical sensors would be unsafe near RF and MRI equipment, and their calibration.
Blood Pressure Measurement
Notes on measuring blood pressure: the auscultatory and oscillometric methods, the diagnostic set and sphygmomanometer, automated and non-invasive monitors, the errors that make a reading wrong, and the routine checks carried out on the device.
