FYS 4250 Fysisk institutt Rikshospitalet Medical instrumentation intensive
- Slides: 25
FYS 4250 Fysisk institutt - Rikshospitalet
Medical instrumentation, intensive care unit FYS 4250 Fysisk institutt - Rikshospitalet
Operating room FYS 4250 Fysisk institutt - Rikshospitalet
Approaches • • Physicians Physicists, engineers Researcher Patients Functions: diagnostic, therapeutic, support Invasive / non-invasive Technology: electromagnetic, optical, mecanical FYS 4250 Fysisk institutt - Rikshospitalet
FYS 4250 Fysisk institutt - Rikshospitalet
Unit of measurement, SI system U = 5 volt U is the quantity 5 is the dimension figure [volt] is the unit Examples of non SI-units: bar, psi, inch, yard, degrees Fahrenheit, miles, gallon FYS 4250 Fysisk institutt - Rikshospitalet
Interfering modifying desired FYS 4250 Fysisk institutt - Rikshospitalet
Example: modifying, interfering input FYS 4250 Fysisk institutt - Rikshospitalet
Regulation systems of the body FYS 4250 Fysisk institutt - Rikshospitalet
Servo loop FYS 4250 Fysisk institutt - Rikshospitalet
Servo (negative feedback) Eq. 1. 3 y = output FYS 4250 xd = desired input Gd = gain Fysisk institutt - Rikshospitalet Hf = part of y back to input
Biostatistics • Sensitivity high • Specificity high FYS 4250 → → high true positive high true negative Fysisk institutt - Rikshospitalet
(a) Linear system fits the equation y = mx + b. (b) Nonlinear system does not fit the straight line. (a) FYS 4250 (b) Fysisk institutt - Rikshospitalet
(a) The one-point calibration may miss nonlinearity. (b) The two-point calibration may also miss nonlinearity. (a) FYS 4250 (b) Fysisk institutt - Rikshospitalet
A hysteresis loop The output curve obtained when increasing the measurand is different from the output obtained when decreasing the measurand. FYS 4250 Fysisk institutt - Rikshospitalet
Precision, (a) low, (b) high (a) FYS 4250 (b) Fysisk institutt - Rikshospitalet
Accuracy: (a) low, (b) high (a) FYS 4250 (b) Fysisk institutt - Rikshospitalet
Sensitivity Drifting FYS 4250 Fysisk institutt - Rikshospitalet
Linearity FYS 4250 Fysisk institutt - Rikshospitalet
Dynamic systems The medical variable to be measured will normally vary as a function of time The statical and dynamical properties of a measurement instrument can be described with a differeintial equation, usually limited to a 2. order like: a 2 d 2 y/dt 2 + a 1 dy/dt + a 0 y(t) = b 2 d 2 x/dt 2 +b 1 dx/dt + b 0 x(t) input x(t), FYS 4250 output y(t) Fysisk institutt - Rikshospitalet
0. order system, static, no energy storing FYS 4250 Fysisk institutt - Rikshospitalet
1. order system, one energy storing element, relaxation FYS 4250 Fysisk institutt - Rikshospitalet
2. order system, two energy storing elements, swinging system FYS 4250 Fysisk institutt - Rikshospitalet
2. order system, blood pressure monitoring FYS 4250 Fysisk institutt - Rikshospitalet
Teknology: How to Design, construct Produce, market Medical equipment FYS 4250 Fysisk institutt - Rikshospitalet
- Cve-2008-4250
- Redaransvar
- A fys
- Institutt for fysikk og teknologi
- Agnes scott irb
- Meteorologisk institutt (met.no)
- Anonymous acronym
- Institutt for lingvistiske og nordiske studier
- Handlingsplan for fysisk aktivitet
- Fysisk resursteori
- Ergonomi fysisk arbetsmiljö
- Psykisk och fysisk hälsa
- Psykisk och fysisk hälsa
- Pc based medical instruments
- Aami 2018 standards
- Elements of instrumentation system
- Torrance memorial tcu
- Doctors license number
- Cartersville medical center medical records
- Gbmc infoweb
- Hepburn osteometric board
- Piping and instrumentation diagram (p&id)
- Cmc instrumentation and controls
- Hplc instrumentation diagram
- Qualitative flow diagram
- Machine protection systems